Merge branch 'modelarts' of git.pcl.ac.cn:yoyoyard/opendata into modelarts

modules/obs/auth.go

@@ -0,0 +1,466 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+package obs
+
+import (
+	"fmt"
+	"net/url"
+	"sort"
+	"strings"
+	"time"
+)
+
+func (obsClient ObsClient) doAuthTemporary(method, bucketName, objectKey string, params map[string]string,
+	headers map[string][]string, expires int64) (requestURL string, err error) {
+	isAkSkEmpty := obsClient.conf.securityProvider == nil || obsClient.conf.securityProvider.ak == "" || obsClient.conf.securityProvider.sk == ""
+	if isAkSkEmpty == false && obsClient.conf.securityProvider.securityToken != "" {
+		if obsClient.conf.signature == SignatureObs {
+			params[HEADER_STS_TOKEN_OBS] = obsClient.conf.securityProvider.securityToken
+		} else {
+			params[HEADER_STS_TOKEN_AMZ] = obsClient.conf.securityProvider.securityToken
+		}
+	}
+	requestURL, canonicalizedURL := obsClient.conf.formatUrls(bucketName, objectKey, params, true)
+	parsedRequestURL, err := url.Parse(requestURL)
+	if err != nil {
+		return "", err
+	}
+	encodeHeaders(headers)
+	hostName := parsedRequestURL.Host
+
+	isV4 := obsClient.conf.signature == SignatureV4
+	prepareHostAndDate(headers, hostName, isV4)
+
+	if isAkSkEmpty {
+		doLog(LEVEL_WARN, "No ak/sk provided, skip to construct authorization")
+	} else {
+		if isV4 {
+			date, parseDateErr := time.Parse(RFC1123_FORMAT, headers[HEADER_DATE_CAMEL][0])
+			if parseDateErr != nil {
+				doLog(LEVEL_WARN, "Failed to parse date with reason: %v", parseDateErr)
+				return "", parseDateErr
+			}
+			delete(headers, HEADER_DATE_CAMEL)
+			shortDate := date.Format(SHORT_DATE_FORMAT)
+			longDate := date.Format(LONG_DATE_FORMAT)
+			if len(headers[HEADER_HOST_CAMEL]) != 0 {
+				index := strings.LastIndex(headers[HEADER_HOST_CAMEL][0], ":")
+				if index != -1 {
+					port := headers[HEADER_HOST_CAMEL][0][index+1:]
+					if port == "80" || port == "443" {
+						headers[HEADER_HOST_CAMEL] = []string{headers[HEADER_HOST_CAMEL][0][:index]}
+					}
+				}
+
+			}
+
+			signedHeaders, _headers := getSignedHeaders(headers)
+
+			credential, scope := getCredential(obsClient.conf.securityProvider.ak, obsClient.conf.region, shortDate)
+			params[PARAM_ALGORITHM_AMZ_CAMEL] = V4_HASH_PREFIX
+			params[PARAM_CREDENTIAL_AMZ_CAMEL] = credential
+			params[PARAM_DATE_AMZ_CAMEL] = longDate
+			params[PARAM_EXPIRES_AMZ_CAMEL] = Int64ToString(expires)
+			params[PARAM_SIGNEDHEADERS_AMZ_CAMEL] = strings.Join(signedHeaders, ";")
+
+			requestURL, canonicalizedURL = obsClient.conf.formatUrls(bucketName, objectKey, params, true)
+			parsedRequestURL, _err := url.Parse(requestURL)
+			if _err != nil {
+				return "", _err
+			}
+
+			stringToSign := getV4StringToSign(method, canonicalizedURL, parsedRequestURL.RawQuery, scope, longDate, UNSIGNED_PAYLOAD, signedHeaders, _headers)
+			signature := getSignature(stringToSign, obsClient.conf.securityProvider.sk, obsClient.conf.region, shortDate)
+
+			requestURL += fmt.Sprintf("&%s=%s", PARAM_SIGNATURE_AMZ_CAMEL, UrlEncode(signature, false))
+
+		} else {
+			originDate := headers[HEADER_DATE_CAMEL][0]
+			date, parseDateErr := time.Parse(RFC1123_FORMAT, originDate)
+			if parseDateErr != nil {
+				doLog(LEVEL_WARN, "Failed to parse date with reason: %v", parseDateErr)
+				return "", parseDateErr
+			}
+			expires += date.Unix()
+			headers[HEADER_DATE_CAMEL] = []string{Int64ToString(expires)}
+
+			stringToSign := getV2StringToSign(method, canonicalizedURL, headers, obsClient.conf.signature == SignatureObs)
+			signature := UrlEncode(Base64Encode(HmacSha1([]byte(obsClient.conf.securityProvider.sk), []byte(stringToSign))), false)
+			if strings.Index(requestURL, "?") < 0 {
+				requestURL += "?"
+			} else {
+				requestURL += "&"
+			}
+			delete(headers, HEADER_DATE_CAMEL)
+
+			if obsClient.conf.signature != SignatureObs {
+				requestURL += "AWS"
+			}
+			requestURL += fmt.Sprintf("AccessKeyId=%s&Expires=%d&Signature=%s", UrlEncode(obsClient.conf.securityProvider.ak, false), expires, signature)
+		}
+	}
+
+	return
+}
+
+func (obsClient ObsClient) doAuth(method, bucketName, objectKey string, params map[string]string,
+	headers map[string][]string, hostName string) (requestURL string, err error) {
+	isAkSkEmpty := obsClient.conf.securityProvider == nil || obsClient.conf.securityProvider.ak == "" || obsClient.conf.securityProvider.sk == ""
+	if isAkSkEmpty == false && obsClient.conf.securityProvider.securityToken != "" {
+		if obsClient.conf.signature == SignatureObs {
+			headers[HEADER_STS_TOKEN_OBS] = []string{obsClient.conf.securityProvider.securityToken}
+		} else {
+			headers[HEADER_STS_TOKEN_AMZ] = []string{obsClient.conf.securityProvider.securityToken}
+		}
+	}
+	isObs := obsClient.conf.signature == SignatureObs
+	requestURL, canonicalizedURL := obsClient.conf.formatUrls(bucketName, objectKey, params, true)
+	parsedRequestURL, err := url.Parse(requestURL)
+	if err != nil {
+		return "", err
+	}
+	encodeHeaders(headers)
+
+	if hostName == "" {
+		hostName = parsedRequestURL.Host
+	}
+
+	isV4 := obsClient.conf.signature == SignatureV4
+	prepareHostAndDate(headers, hostName, isV4)
+
+	if isAkSkEmpty {
+		doLog(LEVEL_WARN, "No ak/sk provided, skip to construct authorization")
+	} else {
+		ak := obsClient.conf.securityProvider.ak
+		sk := obsClient.conf.securityProvider.sk
+		var authorization string
+		if isV4 {
+			headers[HEADER_CONTENT_SHA256_AMZ] = []string{UNSIGNED_PAYLOAD}
+			ret := v4Auth(ak, sk, obsClient.conf.region, method, canonicalizedURL, parsedRequestURL.RawQuery, headers)
+			authorization = fmt.Sprintf("%s Credential=%s,SignedHeaders=%s,Signature=%s", V4_HASH_PREFIX, ret["Credential"], ret["SignedHeaders"], ret["Signature"])
+		} else {
+			ret := v2Auth(ak, sk, method, canonicalizedURL, headers, isObs)
+			hashPrefix := V2_HASH_PREFIX
+			if isObs {
+				hashPrefix = OBS_HASH_PREFIX
+			}
+			authorization = fmt.Sprintf("%s %s:%s", hashPrefix, ak, ret["Signature"])
+		}
+		headers[HEADER_AUTH_CAMEL] = []string{authorization}
+	}
+	return
+}
+
+func prepareHostAndDate(headers map[string][]string, hostName string, isV4 bool) {
+	headers[HEADER_HOST_CAMEL] = []string{hostName}
+	if date, ok := headers[HEADER_DATE_AMZ]; ok {
+		flag := false
+		if len(date) == 1 {
+			if isV4 {
+				if t, err := time.Parse(LONG_DATE_FORMAT, date[0]); err == nil {
+					headers[HEADER_DATE_CAMEL] = []string{FormatUtcToRfc1123(t)}
+					flag = true
+				}
+			} else {
+				if strings.HasSuffix(date[0], "GMT") {
+					headers[HEADER_DATE_CAMEL] = []string{date[0]}
+					flag = true
+				}
+			}
+		}
+		if !flag {
+			delete(headers, HEADER_DATE_AMZ)
+		}
+	}
+	if _, ok := headers[HEADER_DATE_CAMEL]; !ok {
+		headers[HEADER_DATE_CAMEL] = []string{FormatUtcToRfc1123(time.Now().UTC())}
+	}
+}
+
+func encodeHeaders(headers map[string][]string) {
+	for key, values := range headers {
+		for index, value := range values {
+			values[index] = UrlEncode(value, true)
+		}
+		headers[key] = values
+	}
+}
+
+func attachHeaders(headers map[string][]string, isObs bool) string {
+	length := len(headers)
+	_headers := make(map[string][]string, length)
+	keys := make([]string, 0, length)
+
+	for key, value := range headers {
+		_key := strings.ToLower(strings.TrimSpace(key))
+		if _key != "" {
+			prefixheader := HEADER_PREFIX
+			if isObs {
+				prefixheader = HEADER_PREFIX_OBS
+			}
+			if _key == "content-md5" || _key == "content-type" || _key == "date" || strings.HasPrefix(_key, prefixheader) {
+				keys = append(keys, _key)
+				_headers[_key] = value
+			}
+		} else {
+			delete(headers, key)
+		}
+	}
+
+	for _, interestedHeader := range interestedHeaders {
+		if _, ok := _headers[interestedHeader]; !ok {
+			_headers[interestedHeader] = []string{""}
+			keys = append(keys, interestedHeader)
+		}
+	}
+	dateCamelHeader := PARAM_DATE_AMZ_CAMEL
+	dataHeader := HEADER_DATE_AMZ
+	if isObs {
+		dateCamelHeader = PARAM_DATE_OBS_CAMEL
+		dataHeader = HEADER_DATE_OBS
+	}
+	if _, ok := _headers[HEADER_DATE_CAMEL]; ok {
+		if _, ok := _headers[dataHeader]; ok {
+			_headers[HEADER_DATE_CAMEL] = []string{""}
+		} else if _, ok := headers[dateCamelHeader]; ok {
+			_headers[HEADER_DATE_CAMEL] = []string{""}
+		}
+	} else if _, ok := _headers[strings.ToLower(HEADER_DATE_CAMEL)]; ok {
+		if _, ok := _headers[dataHeader]; ok {
+			_headers[HEADER_DATE_CAMEL] = []string{""}
+		} else if _, ok := headers[dateCamelHeader]; ok {
+			_headers[HEADER_DATE_CAMEL] = []string{""}
+		}
+	}
+
+	sort.Strings(keys)
+
+	stringToSign := make([]string, 0, len(keys))
+	for _, key := range keys {
+		var value string
+		prefixHeader := HEADER_PREFIX
+		prefixMetaHeader := HEADER_PREFIX_META
+		if isObs {
+			prefixHeader = HEADER_PREFIX_OBS
+			prefixMetaHeader = HEADER_PREFIX_META_OBS
+		}
+		if strings.HasPrefix(key, prefixHeader) {
+			if strings.HasPrefix(key, prefixMetaHeader) {
+				for index, v := range _headers[key] {
+					value += strings.TrimSpace(v)
+					if index != len(_headers[key])-1 {
+						value += ","
+					}
+				}
+			} else {
+				value = strings.Join(_headers[key], ",")
+			}
+			value = fmt.Sprintf("%s:%s", key, value)
+		} else {
+			value = strings.Join(_headers[key], ",")
+		}
+		stringToSign = append(stringToSign, value)
+	}
+	return strings.Join(stringToSign, "\n")
+}
+
+func getV2StringToSign(method, canonicalizedURL string, headers map[string][]string, isObs bool) string {
+	stringToSign := strings.Join([]string{method, "\n", attachHeaders(headers, isObs), "\n", canonicalizedURL}, "")
+
+	var isSecurityToken bool
+	var securityToken []string
+	if isObs {
+		securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_OBS]
+	} else {
+		securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_AMZ]
+	}
+	var query []string
+	if !isSecurityToken {
+		parmas := strings.Split(canonicalizedURL, "?")
+		if len(parmas) > 1 {
+			query = strings.Split(parmas[1], "&")
+			for _, value := range query {
+				if strings.HasPrefix(value, HEADER_STS_TOKEN_AMZ+"=") || strings.HasPrefix(value, HEADER_STS_TOKEN_OBS+"=") {
+					if value[len(HEADER_STS_TOKEN_AMZ)+1:] != "" {
+						securityToken = []string{value[len(HEADER_STS_TOKEN_AMZ)+1:]}
+						isSecurityToken = true
+					}
+				}
+			}
+		}
+	}
+	logStringToSign := stringToSign
+	if isSecurityToken && len(securityToken) > 0 {
+		logStringToSign = strings.Replace(logStringToSign, securityToken[0], "******", -1)
+	}
+	doLog(LEVEL_DEBUG, "The v2 auth stringToSign:\n%s", logStringToSign)
+	return stringToSign
+}
+
+func v2Auth(ak, sk, method, canonicalizedURL string, headers map[string][]string, isObs bool) map[string]string {
+	stringToSign := getV2StringToSign(method, canonicalizedURL, headers, isObs)
+	return map[string]string{"Signature": Base64Encode(HmacSha1([]byte(sk), []byte(stringToSign)))}
+}
+
+func getScope(region, shortDate string) string {
+	return fmt.Sprintf("%s/%s/%s/%s", shortDate, region, V4_SERVICE_NAME, V4_SERVICE_SUFFIX)
+}
+
+func getCredential(ak, region, shortDate string) (string, string) {
+	scope := getScope(region, shortDate)
+	return fmt.Sprintf("%s/%s", ak, scope), scope
+}
+
+func getV4StringToSign(method, canonicalizedURL, queryURL, scope, longDate, payload string, signedHeaders []string, headers map[string][]string) string {
+	canonicalRequest := make([]string, 0, 10+len(signedHeaders)*4)
+	canonicalRequest = append(canonicalRequest, method)
+	canonicalRequest = append(canonicalRequest, "\n")
+	canonicalRequest = append(canonicalRequest, canonicalizedURL)
+	canonicalRequest = append(canonicalRequest, "\n")
+	canonicalRequest = append(canonicalRequest, queryURL)
+	canonicalRequest = append(canonicalRequest, "\n")
+
+	for _, signedHeader := range signedHeaders {
+		values, _ := headers[signedHeader]
+		for _, value := range values {
+			canonicalRequest = append(canonicalRequest, signedHeader)
+			canonicalRequest = append(canonicalRequest, ":")
+			canonicalRequest = append(canonicalRequest, value)
+			canonicalRequest = append(canonicalRequest, "\n")
+		}
+	}
+	canonicalRequest = append(canonicalRequest, "\n")
+	canonicalRequest = append(canonicalRequest, strings.Join(signedHeaders, ";"))
+	canonicalRequest = append(canonicalRequest, "\n")
+	canonicalRequest = append(canonicalRequest, payload)
+
+	_canonicalRequest := strings.Join(canonicalRequest, "")
+
+	var isSecurityToken bool
+	var securityToken []string
+	if securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_OBS]; !isSecurityToken {
+		securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_AMZ]
+	}
+	var query []string
+	if !isSecurityToken {
+		query = strings.Split(queryURL, "&")
+		for _, value := range query {
+			if strings.HasPrefix(value, HEADER_STS_TOKEN_AMZ+"=") || strings.HasPrefix(value, HEADER_STS_TOKEN_OBS+"=") {
+				if value[len(HEADER_STS_TOKEN_AMZ)+1:] != "" {
+					securityToken = []string{value[len(HEADER_STS_TOKEN_AMZ)+1:]}
+					isSecurityToken = true
+				}
+			}
+		}
+	}
+	logCanonicalRequest := _canonicalRequest
+	if isSecurityToken && len(securityToken) > 0 {
+		logCanonicalRequest = strings.Replace(logCanonicalRequest, securityToken[0], "******", -1)
+	}
+	doLog(LEVEL_DEBUG, "The v4 auth canonicalRequest:\n%s", logCanonicalRequest)
+
+	stringToSign := make([]string, 0, 7)
+	stringToSign = append(stringToSign, V4_HASH_PREFIX)
+	stringToSign = append(stringToSign, "\n")
+	stringToSign = append(stringToSign, longDate)
+	stringToSign = append(stringToSign, "\n")
+	stringToSign = append(stringToSign, scope)
+	stringToSign = append(stringToSign, "\n")
+	stringToSign = append(stringToSign, HexSha256([]byte(_canonicalRequest)))
+
+	_stringToSign := strings.Join(stringToSign, "")
+
+	doLog(LEVEL_DEBUG, "The v4 auth stringToSign:\n%s", _stringToSign)
+	return _stringToSign
+}
+
+func getSignedHeaders(headers map[string][]string) ([]string, map[string][]string) {
+	length := len(headers)
+	_headers := make(map[string][]string, length)
+	signedHeaders := make([]string, 0, length)
+	for key, value := range headers {
+		_key := strings.ToLower(strings.TrimSpace(key))
+		if _key != "" {
+			signedHeaders = append(signedHeaders, _key)
+			_headers[_key] = value
+		} else {
+			delete(headers, key)
+		}
+	}
+	sort.Strings(signedHeaders)
+	return signedHeaders, _headers
+}
+
+func getSignature(stringToSign, sk, region, shortDate string) string {
+	key := HmacSha256([]byte(V4_HASH_PRE+sk), []byte(shortDate))
+	key = HmacSha256(key, []byte(region))
+	key = HmacSha256(key, []byte(V4_SERVICE_NAME))
+	key = HmacSha256(key, []byte(V4_SERVICE_SUFFIX))
+	return Hex(HmacSha256(key, []byte(stringToSign)))
+}
+
+// V4Auth is a wrapper for v4Auth
+func V4Auth(ak, sk, region, method, canonicalizedURL, queryURL string, headers map[string][]string) map[string]string {
+	return v4Auth(ak, sk, region, method, canonicalizedURL, queryURL, headers)
+}
+
+func v4Auth(ak, sk, region, method, canonicalizedURL, queryURL string, headers map[string][]string) map[string]string {
+	var t time.Time
+	if val, ok := headers[HEADER_DATE_AMZ]; ok {
+		var err error
+		t, err = time.Parse(LONG_DATE_FORMAT, val[0])
+		if err != nil {
+			t = time.Now().UTC()
+		}
+	} else if val, ok := headers[PARAM_DATE_AMZ_CAMEL]; ok {
+		var err error
+		t, err = time.Parse(LONG_DATE_FORMAT, val[0])
+		if err != nil {
+			t = time.Now().UTC()
+		}
+	} else if val, ok := headers[HEADER_DATE_CAMEL]; ok {
+		var err error
+		t, err = time.Parse(RFC1123_FORMAT, val[0])
+		if err != nil {
+			t = time.Now().UTC()
+		}
+	} else if val, ok := headers[strings.ToLower(HEADER_DATE_CAMEL)]; ok {
+		var err error
+		t, err = time.Parse(RFC1123_FORMAT, val[0])
+		if err != nil {
+			t = time.Now().UTC()
+		}
+	} else {
+		t = time.Now().UTC()
+	}
+	shortDate := t.Format(SHORT_DATE_FORMAT)
+	longDate := t.Format(LONG_DATE_FORMAT)
+
+	signedHeaders, _headers := getSignedHeaders(headers)
+
+	credential, scope := getCredential(ak, region, shortDate)
+
+	payload := UNSIGNED_PAYLOAD
+	if val, ok := headers[HEADER_CONTENT_SHA256_AMZ]; ok {
+		payload = val[0]
+	}
+	stringToSign := getV4StringToSign(method, canonicalizedURL, queryURL, scope, longDate, payload, signedHeaders, _headers)
+
+	signature := getSignature(stringToSign, sk, region, shortDate)
+
+	ret := make(map[string]string, 3)
+	ret["Credential"] = credential
+	ret["SignedHeaders"] = strings.Join(signedHeaders, ";")
+	ret["Signature"] = signature
+	return ret
+}

modules/obs/conf.go

@@ -0,0 +1,471 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:golint, unused
+package obs
+
+import (
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type securityProvider struct {
+	ak            string
+	sk            string
+	securityToken string
+}
+
+type urlHolder struct {
+	scheme string
+	host   string
+	port   int
+}
+
+type config struct {
+	securityProvider *securityProvider
+	urlHolder        *urlHolder
+	pathStyle        bool
+	cname            bool
+	sslVerify        bool
+	endpoint         string
+	signature        SignatureType
+	region           string
+	connectTimeout   int
+	socketTimeout    int
+	headerTimeout    int
+	idleConnTimeout  int
+	finalTimeout     int
+	maxRetryCount    int
+	proxyURL         string
+	maxConnsPerHost  int
+	pemCerts         []byte
+	transport        *http.Transport
+	ctx              context.Context
+	maxRedirectCount int
+}
+
+func (conf config) String() string {
+	return fmt.Sprintf("[endpoint:%s, signature:%s, pathStyle:%v, region:%s"+
+		"\nconnectTimeout:%d, socketTimeout:%dheaderTimeout:%d, idleConnTimeout:%d"+
+		"\nmaxRetryCount:%d, maxConnsPerHost:%d, sslVerify:%v, maxRedirectCount:%d]",
+		conf.endpoint, conf.signature, conf.pathStyle, conf.region,
+		conf.connectTimeout, conf.socketTimeout, conf.headerTimeout, conf.idleConnTimeout,
+		conf.maxRetryCount, conf.maxConnsPerHost, conf.sslVerify, conf.maxRedirectCount,
+	)
+}
+
+type configurer func(conf *config)
+
+// WithSslVerify is a wrapper for WithSslVerifyAndPemCerts.
+func WithSslVerify(sslVerify bool) configurer {
+	return WithSslVerifyAndPemCerts(sslVerify, nil)
+}
+
+// WithSslVerifyAndPemCerts is a configurer for ObsClient to set conf.sslVerify and conf.pemCerts.
+func WithSslVerifyAndPemCerts(sslVerify bool, pemCerts []byte) configurer {
+	return func(conf *config) {
+		conf.sslVerify = sslVerify
+		conf.pemCerts = pemCerts
+	}
+}
+
+// WithHeaderTimeout is a configurer for ObsClient to set the timeout period of obtaining the response headers.
+func WithHeaderTimeout(headerTimeout int) configurer {
+	return func(conf *config) {
+		conf.headerTimeout = headerTimeout
+	}
+}
+
+// WithProxyUrl is a configurer for ObsClient to set HTTP proxy.
+func WithProxyUrl(proxyURL string) configurer {
+	return func(conf *config) {
+		conf.proxyURL = proxyURL
+	}
+}
+
+// WithMaxConnections is a configurer for ObsClient to set the maximum number of idle HTTP connections.
+func WithMaxConnections(maxConnsPerHost int) configurer {
+	return func(conf *config) {
+		conf.maxConnsPerHost = maxConnsPerHost
+	}
+}
+
+// WithPathStyle is a configurer for ObsClient.
+func WithPathStyle(pathStyle bool) configurer {
+	return func(conf *config) {
+		conf.pathStyle = pathStyle
+	}
+}
+
+// WithSignature is a configurer for ObsClient.
+func WithSignature(signature SignatureType) configurer {
+	return func(conf *config) {
+		conf.signature = signature
+	}
+}
+
+// WithRegion is a configurer for ObsClient.
+func WithRegion(region string) configurer {
+	return func(conf *config) {
+		conf.region = region
+	}
+}
+
+// WithConnectTimeout is a configurer for ObsClient to set timeout period for establishing
+// an http/https connection, in seconds.
+func WithConnectTimeout(connectTimeout int) configurer {
+	return func(conf *config) {
+		conf.connectTimeout = connectTimeout
+	}
+}
+
+// WithSocketTimeout is a configurer for ObsClient to set the timeout duration for transmitting data at
+// the socket layer, in seconds.
+func WithSocketTimeout(socketTimeout int) configurer {
+	return func(conf *config) {
+		conf.socketTimeout = socketTimeout
+	}
+}
+
+// WithIdleConnTimeout is a configurer for ObsClient to set the timeout period of an idle HTTP connection
+// in the connection pool, in seconds.
+func WithIdleConnTimeout(idleConnTimeout int) configurer {
+	return func(conf *config) {
+		conf.idleConnTimeout = idleConnTimeout
+	}
+}
+
+// WithMaxRetryCount is a configurer for ObsClient to set the maximum number of retries when an HTTP/HTTPS connection is abnormal.
+func WithMaxRetryCount(maxRetryCount int) configurer {
+	return func(conf *config) {
+		conf.maxRetryCount = maxRetryCount
+	}
+}
+
+// WithSecurityToken is a configurer for ObsClient to set the security token in the temporary access keys.
+func WithSecurityToken(securityToken string) configurer {
+	return func(conf *config) {
+		conf.securityProvider.securityToken = securityToken
+	}
+}
+
+// WithHttpTransport is a configurer for ObsClient to set the customized http Transport.
+func WithHttpTransport(transport *http.Transport) configurer {
+	return func(conf *config) {
+		conf.transport = transport
+	}
+}
+
+// WithRequestContext is a configurer for ObsClient to set the context for each HTTP request.
+func WithRequestContext(ctx context.Context) configurer {
+	return func(conf *config) {
+		conf.ctx = ctx
+	}
+}
+
+// WithCustomDomainName is a configurer for ObsClient.
+func WithCustomDomainName(cname bool) configurer {
+	return func(conf *config) {
+		conf.cname = cname
+	}
+}
+
+// WithMaxRedirectCount is a configurer for ObsClient to set the maximum number of times that the request is redirected.
+func WithMaxRedirectCount(maxRedirectCount int) configurer {
+	return func(conf *config) {
+		conf.maxRedirectCount = maxRedirectCount
+	}
+}
+
+func (conf *config) prepareConfig() {
+	if conf.connectTimeout <= 0 {
+		conf.connectTimeout = DEFAULT_CONNECT_TIMEOUT
+	}
+
+	if conf.socketTimeout <= 0 {
+		conf.socketTimeout = DEFAULT_SOCKET_TIMEOUT
+	}
+
+	conf.finalTimeout = conf.socketTimeout * 10
+
+	if conf.headerTimeout <= 0 {
+		conf.headerTimeout = DEFAULT_HEADER_TIMEOUT
+	}
+
+	if conf.idleConnTimeout < 0 {
+		conf.idleConnTimeout = DEFAULT_IDLE_CONN_TIMEOUT
+	}
+
+	if conf.maxRetryCount < 0 {
+		conf.maxRetryCount = DEFAULT_MAX_RETRY_COUNT
+	}
+
+	if conf.maxConnsPerHost <= 0 {
+		conf.maxConnsPerHost = DEFAULT_MAX_CONN_PER_HOST
+	}
+
+	if conf.maxRedirectCount < 0 {
+		conf.maxRedirectCount = DEFAULT_MAX_REDIRECT_COUNT
+	}
+}
+
+func (conf *config) initConfigWithDefault() error {
+	conf.securityProvider.ak = strings.TrimSpace(conf.securityProvider.ak)
+	conf.securityProvider.sk = strings.TrimSpace(conf.securityProvider.sk)
+	conf.securityProvider.securityToken = strings.TrimSpace(conf.securityProvider.securityToken)
+	conf.endpoint = strings.TrimSpace(conf.endpoint)
+	if conf.endpoint == "" {
+		return errors.New("endpoint is not set")
+	}
+
+	if index := strings.Index(conf.endpoint, "?"); index > 0 {
+		conf.endpoint = conf.endpoint[:index]
+	}
+
+	for strings.LastIndex(conf.endpoint, "/") == len(conf.endpoint)-1 {
+		conf.endpoint = conf.endpoint[:len(conf.endpoint)-1]
+	}
+
+	if conf.signature == "" {
+		conf.signature = DEFAULT_SIGNATURE
+	}
+
+	urlHolder := &urlHolder{}
+	var address string
+	if strings.HasPrefix(conf.endpoint, "https://") {
+		urlHolder.scheme = "https"
+		address = conf.endpoint[len("https://"):]
+	} else if strings.HasPrefix(conf.endpoint, "http://") {
+		urlHolder.scheme = "http"
+		address = conf.endpoint[len("http://"):]
+	} else {
+		urlHolder.scheme = "https"
+		address = conf.endpoint
+	}
+
+	addr := strings.Split(address, ":")
+	if len(addr) == 2 {
+		if port, err := strconv.Atoi(addr[1]); err == nil {
+			urlHolder.port = port
+		}
+	}
+	urlHolder.host = addr[0]
+	if urlHolder.port == 0 {
+		if urlHolder.scheme == "https" {
+			urlHolder.port = 443
+		} else {
+			urlHolder.port = 80
+		}
+	}
+
+	if IsIP(urlHolder.host) {
+		conf.pathStyle = true
+	}
+
+	conf.urlHolder = urlHolder
+
+	conf.region = strings.TrimSpace(conf.region)
+	if conf.region == "" {
+		conf.region = DEFAULT_REGION
+	}
+
+	conf.prepareConfig()
+	conf.proxyURL = strings.TrimSpace(conf.proxyURL)
+	return nil
+}
+
+func (conf *config) getTransport() error {
+	if conf.transport == nil {
+		conf.transport = &http.Transport{
+			Dial: func(network, addr string) (net.Conn, error) {
+				conn, err := net.DialTimeout(network, addr, time.Second*time.Duration(conf.connectTimeout))
+				if err != nil {
+					return nil, err
+				}
+				return getConnDelegate(conn, conf.socketTimeout, conf.finalTimeout), nil
+			},
+			MaxIdleConns:          conf.maxConnsPerHost,
+			MaxIdleConnsPerHost:   conf.maxConnsPerHost,
+			ResponseHeaderTimeout: time.Second * time.Duration(conf.headerTimeout),
+			IdleConnTimeout:       time.Second * time.Duration(conf.idleConnTimeout),
+		}
+
+		if conf.proxyURL != "" {
+			proxyURL, err := url.Parse(conf.proxyURL)
+			if err != nil {
+				return err
+			}
+			conf.transport.Proxy = http.ProxyURL(proxyURL)
+		}
+
+		tlsConfig := &tls.Config{InsecureSkipVerify: !conf.sslVerify}
+		if conf.sslVerify && conf.pemCerts != nil {
+			pool := x509.NewCertPool()
+			pool.AppendCertsFromPEM(conf.pemCerts)
+			tlsConfig.RootCAs = pool
+		}
+
+		conf.transport.TLSClientConfig = tlsConfig
+		conf.transport.DisableCompression = true
+	}
+
+	return nil
+}
+
+func checkRedirectFunc(req *http.Request, via []*http.Request) error {
+	return http.ErrUseLastResponse
+}
+
+// DummyQueryEscape return the input string.
+func DummyQueryEscape(s string) string {
+	return s
+}
+
+func (conf *config) prepareBaseURL(bucketName string) (requestURL string, canonicalizedURL string) {
+	urlHolder := conf.urlHolder
+	if conf.cname {
+		requestURL = fmt.Sprintf("%s://%s:%d", urlHolder.scheme, urlHolder.host, urlHolder.port)
+		if conf.signature == "v4" {
+			canonicalizedURL = "/"
+		} else {
+			canonicalizedURL = "/" + urlHolder.host + "/"
+		}
+	} else {
+		if bucketName == "" {
+			requestURL = fmt.Sprintf("%s://%s:%d", urlHolder.scheme, urlHolder.host, urlHolder.port)
+			canonicalizedURL = "/"
+		} else {
+			if conf.pathStyle {
+				requestURL = fmt.Sprintf("%s://%s:%d/%s", urlHolder.scheme, urlHolder.host, urlHolder.port, bucketName)
+				canonicalizedURL = "/" + bucketName
+			} else {
+				requestURL = fmt.Sprintf("%s://%s.%s:%d", urlHolder.scheme, bucketName, urlHolder.host, urlHolder.port)
+				if conf.signature == "v2" || conf.signature == "OBS" {
+					canonicalizedURL = "/" + bucketName + "/"
+				} else {
+					canonicalizedURL = "/"
+				}
+			}
+		}
+	}
+	return
+}
+
+func (conf *config) prepareObjectKey(escape bool, objectKey string, escapeFunc func(s string) string) (encodeObjectKey string) {
+	if escape {
+		tempKey := []rune(objectKey)
+		result := make([]string, 0, len(tempKey))
+		for _, value := range tempKey {
+			if string(value) == "/" {
+				result = append(result, string(value))
+			} else {
+				if string(value) == " " {
+					result = append(result, url.PathEscape(string(value)))
+				} else {
+					result = append(result, url.QueryEscape(string(value)))
+				}
+			}
+		}
+		encodeObjectKey = strings.Join(result, "")
+	} else {
+		encodeObjectKey = escapeFunc(objectKey)
+	}
+	return
+}
+
+func (conf *config) prepareEscapeFunc(escape bool) (escapeFunc func(s string) string) {
+	if escape {
+		return url.QueryEscape
+	}
+	return DummyQueryEscape
+}
+
+func (conf *config) formatUrls(bucketName, objectKey string, params map[string]string, escape bool) (requestURL string, canonicalizedURL string) {
+
+	requestURL, canonicalizedURL = conf.prepareBaseURL(bucketName)
+	var escapeFunc func(s string) string
+	escapeFunc = conf.prepareEscapeFunc(escape)
+
+	if objectKey != "" {
+		var encodeObjectKey string
+		encodeObjectKey = conf.prepareObjectKey(escape, objectKey, escapeFunc)
+		requestURL += "/" + encodeObjectKey
+		if !strings.HasSuffix(canonicalizedURL, "/") {
+			canonicalizedURL += "/"
+		}
+		canonicalizedURL += encodeObjectKey
+	}
+
+	keys := make([]string, 0, len(params))
+	for key := range params {
+		keys = append(keys, strings.TrimSpace(key))
+	}
+	sort.Strings(keys)
+	i := 0
+
+	for index, key := range keys {
+		if index == 0 {
+			requestURL += "?"
+		} else {
+			requestURL += "&"
+		}
+		_key := url.QueryEscape(key)
+		requestURL += _key
+
+		_value := params[key]
+		if conf.signature == "v4" {
+			requestURL += "=" + url.QueryEscape(_value)
+		} else {
+			if _value != "" {
+				requestURL += "=" + url.QueryEscape(_value)
+				_value = "=" + _value
+			} else {
+				_value = ""
+			}
+			lowerKey := strings.ToLower(key)
+			_, ok := allowedResourceParameterNames[lowerKey]
+			prefixHeader := HEADER_PREFIX
+			isObs := conf.signature == SignatureObs
+			if isObs {
+				prefixHeader = HEADER_PREFIX_OBS
+			}
+			ok = ok || strings.HasPrefix(lowerKey, prefixHeader)
+			if ok {
+				if i == 0 {
+					canonicalizedURL += "?"
+				} else {
+					canonicalizedURL += "&"
+				}
+				canonicalizedURL += getQueryURL(_key, _value)
+				i++
+			}
+		}
+	}
+	return
+}
+
+func getQueryURL(key, value string) string {
+	queryURL := ""
+	queryURL += key
+	queryURL += value
+	return queryURL
+}

modules/obs/const.go

@@ -0,0 +1,932 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:golint, unused
+package obs
+
+const (
+	obsSdkVersion          = "3.20.9"
+	USER_AGENT             = "obs-sdk-go/" + obsSdkVersion
+	HEADER_PREFIX          = "x-amz-"
+	HEADER_PREFIX_META     = "x-amz-meta-"
+	HEADER_PREFIX_OBS      = "x-obs-"
+	HEADER_PREFIX_META_OBS = "x-obs-meta-"
+	HEADER_DATE_AMZ        = "x-amz-date"
+	HEADER_DATE_OBS        = "x-obs-date"
+	HEADER_STS_TOKEN_AMZ   = "x-amz-security-token"
+	HEADER_STS_TOKEN_OBS   = "x-obs-security-token"
+	HEADER_ACCESSS_KEY_AMZ = "AWSAccessKeyId"
+	PREFIX_META            = "meta-"
+
+	HEADER_CONTENT_SHA256_AMZ               = "x-amz-content-sha256"
+	HEADER_ACL_AMZ                          = "x-amz-acl"
+	HEADER_ACL_OBS                          = "x-obs-acl"
+	HEADER_ACL                              = "acl"
+	HEADER_LOCATION_AMZ                     = "location"
+	HEADER_BUCKET_LOCATION_OBS              = "bucket-location"
+	HEADER_COPY_SOURCE                      = "copy-source"
+	HEADER_COPY_SOURCE_RANGE                = "copy-source-range"
+	HEADER_RANGE                            = "Range"
+	HEADER_STORAGE_CLASS                    = "x-default-storage-class"
+	HEADER_STORAGE_CLASS_OBS                = "x-obs-storage-class"
+	HEADER_VERSION_OBS                      = "version"
+	HEADER_GRANT_READ_OBS                   = "grant-read"
+	HEADER_GRANT_WRITE_OBS                  = "grant-write"
+	HEADER_GRANT_READ_ACP_OBS               = "grant-read-acp"
+	HEADER_GRANT_WRITE_ACP_OBS              = "grant-write-acp"
+	HEADER_GRANT_FULL_CONTROL_OBS           = "grant-full-control"
+	HEADER_GRANT_READ_DELIVERED_OBS         = "grant-read-delivered"
+	HEADER_GRANT_FULL_CONTROL_DELIVERED_OBS = "grant-full-control-delivered"
+	HEADER_REQUEST_ID                       = "request-id"
+	HEADER_BUCKET_REGION                    = "bucket-region"
+	HEADER_ACCESS_CONRTOL_ALLOW_ORIGIN      = "access-control-allow-origin"
+	HEADER_ACCESS_CONRTOL_ALLOW_HEADERS     = "access-control-allow-headers"
+	HEADER_ACCESS_CONRTOL_MAX_AGE           = "access-control-max-age"
+	HEADER_ACCESS_CONRTOL_ALLOW_METHODS     = "access-control-allow-methods"
+	HEADER_ACCESS_CONRTOL_EXPOSE_HEADERS    = "access-control-expose-headers"
+	HEADER_EPID_HEADERS                     = "epid"
+	HEADER_VERSION_ID                       = "version-id"
+	HEADER_COPY_SOURCE_VERSION_ID           = "copy-source-version-id"
+	HEADER_DELETE_MARKER                    = "delete-marker"
+	HEADER_WEBSITE_REDIRECT_LOCATION        = "website-redirect-location"
+	HEADER_METADATA_DIRECTIVE               = "metadata-directive"
+	HEADER_EXPIRATION                       = "expiration"
+	HEADER_EXPIRES_OBS                      = "x-obs-expires"
+	HEADER_RESTORE                          = "restore"
+	HEADER_OBJECT_TYPE                      = "object-type"
+	HEADER_NEXT_APPEND_POSITION             = "next-append-position"
+	HEADER_STORAGE_CLASS2                   = "storage-class"
+	HEADER_CONTENT_LENGTH                   = "content-length"
+	HEADER_CONTENT_TYPE                     = "content-type"
+	HEADER_CONTENT_LANGUAGE                 = "content-language"
+	HEADER_EXPIRES                          = "expires"
+	HEADER_CACHE_CONTROL                    = "cache-control"
+	HEADER_CONTENT_DISPOSITION              = "content-disposition"
+	HEADER_CONTENT_ENCODING                 = "content-encoding"
+	HEADER_AZ_REDUNDANCY                    = "az-redundancy"
+	headerOefMarker                         = "oef-marker"
+
+	HEADER_ETAG         = "etag"
+	HEADER_LASTMODIFIED = "last-modified"
+
+	HEADER_COPY_SOURCE_IF_MATCH            = "copy-source-if-match"
+	HEADER_COPY_SOURCE_IF_NONE_MATCH       = "copy-source-if-none-match"
+	HEADER_COPY_SOURCE_IF_MODIFIED_SINCE   = "copy-source-if-modified-since"
+	HEADER_COPY_SOURCE_IF_UNMODIFIED_SINCE = "copy-source-if-unmodified-since"
+
+	HEADER_IF_MATCH            = "If-Match"
+	HEADER_IF_NONE_MATCH       = "If-None-Match"
+	HEADER_IF_MODIFIED_SINCE   = "If-Modified-Since"
+	HEADER_IF_UNMODIFIED_SINCE = "If-Unmodified-Since"
+
+	HEADER_SSEC_ENCRYPTION = "server-side-encryption-customer-algorithm"
+	HEADER_SSEC_KEY        = "server-side-encryption-customer-key"
+	HEADER_SSEC_KEY_MD5    = "server-side-encryption-customer-key-MD5"
+
+	HEADER_SSEKMS_ENCRYPTION      = "server-side-encryption"
+	HEADER_SSEKMS_KEY             = "server-side-encryption-aws-kms-key-id"
+	HEADER_SSEKMS_ENCRYPT_KEY_OBS = "server-side-encryption-kms-key-id"
+
+	HEADER_SSEC_COPY_SOURCE_ENCRYPTION = "copy-source-server-side-encryption-customer-algorithm"
+	HEADER_SSEC_COPY_SOURCE_KEY        = "copy-source-server-side-encryption-customer-key"
+	HEADER_SSEC_COPY_SOURCE_KEY_MD5    = "copy-source-server-side-encryption-customer-key-MD5"
+
+	HEADER_SSEKMS_KEY_AMZ = "x-amz-server-side-encryption-aws-kms-key-id"
+
+	HEADER_SSEKMS_KEY_OBS = "x-obs-server-side-encryption-kms-key-id"
+
+	HEADER_SUCCESS_ACTION_REDIRECT = "success_action_redirect"
+
+	HEADER_DATE_CAMEL                          = "Date"
+	HEADER_HOST_CAMEL                          = "Host"
+	HEADER_HOST                                = "host"
+	HEADER_AUTH_CAMEL                          = "Authorization"
+	HEADER_MD5_CAMEL                           = "Content-MD5"
+	HEADER_LOCATION_CAMEL                      = "Location"
+	HEADER_CONTENT_LENGTH_CAMEL                = "Content-Length"
+	HEADER_CONTENT_TYPE_CAML                   = "Content-Type"
+	HEADER_USER_AGENT_CAMEL                    = "User-Agent"
+	HEADER_ORIGIN_CAMEL                        = "Origin"
+	HEADER_ACCESS_CONTROL_REQUEST_HEADER_CAMEL = "Access-Control-Request-Headers"
+	HEADER_CACHE_CONTROL_CAMEL                 = "Cache-Control"
+	HEADER_CONTENT_DISPOSITION_CAMEL           = "Content-Disposition"
+	HEADER_CONTENT_ENCODING_CAMEL              = "Content-Encoding"
+	HEADER_CONTENT_LANGUAGE_CAMEL              = "Content-Language"
+	HEADER_EXPIRES_CAMEL                       = "Expires"
+
+	PARAM_VERSION_ID                   = "versionId"
+	PARAM_RESPONSE_CONTENT_TYPE        = "response-content-type"
+	PARAM_RESPONSE_CONTENT_LANGUAGE    = "response-content-language"
+	PARAM_RESPONSE_EXPIRES             = "response-expires"
+	PARAM_RESPONSE_CACHE_CONTROL       = "response-cache-control"
+	PARAM_RESPONSE_CONTENT_DISPOSITION = "response-content-disposition"
+	PARAM_RESPONSE_CONTENT_ENCODING    = "response-content-encoding"
+	PARAM_IMAGE_PROCESS                = "x-image-process"
+
+	PARAM_ALGORITHM_AMZ_CAMEL     = "X-Amz-Algorithm"
+	PARAM_CREDENTIAL_AMZ_CAMEL    = "X-Amz-Credential"
+	PARAM_DATE_AMZ_CAMEL          = "X-Amz-Date"
+	PARAM_DATE_OBS_CAMEL          = "X-Obs-Date"
+	PARAM_EXPIRES_AMZ_CAMEL       = "X-Amz-Expires"
+	PARAM_SIGNEDHEADERS_AMZ_CAMEL = "X-Amz-SignedHeaders"
+	PARAM_SIGNATURE_AMZ_CAMEL     = "X-Amz-Signature"
+
+	DEFAULT_SIGNATURE            = SignatureV2
+	DEFAULT_REGION               = "region"
+	DEFAULT_CONNECT_TIMEOUT      = 60
+	DEFAULT_SOCKET_TIMEOUT       = 60
+	DEFAULT_HEADER_TIMEOUT       = 60
+	DEFAULT_IDLE_CONN_TIMEOUT    = 30
+	DEFAULT_MAX_RETRY_COUNT      = 3
+	DEFAULT_MAX_REDIRECT_COUNT   = 3
+	DEFAULT_MAX_CONN_PER_HOST    = 1000
+	EMPTY_CONTENT_SHA256         = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+	UNSIGNED_PAYLOAD             = "UNSIGNED-PAYLOAD"
+	LONG_DATE_FORMAT             = "20060102T150405Z"
+	SHORT_DATE_FORMAT            = "20060102"
+	ISO8601_DATE_FORMAT          = "2006-01-02T15:04:05Z"
+	ISO8601_MIDNIGHT_DATE_FORMAT = "2006-01-02T00:00:00Z"
+	RFC1123_FORMAT               = "Mon, 02 Jan 2006 15:04:05 GMT"
+
+	V4_SERVICE_NAME   = "s3"
+	V4_SERVICE_SUFFIX = "aws4_request"
+
+	V2_HASH_PREFIX  = "AWS"
+	OBS_HASH_PREFIX = "OBS"
+
+	V4_HASH_PREFIX = "AWS4-HMAC-SHA256"
+	V4_HASH_PRE    = "AWS4"
+
+	DEFAULT_SSE_KMS_ENCRYPTION     = "aws:kms"
+	DEFAULT_SSE_KMS_ENCRYPTION_OBS = "kms"
+
+	DEFAULT_SSE_C_ENCRYPTION = "AES256"
+
+	HTTP_GET     = "GET"
+	HTTP_POST    = "POST"
+	HTTP_PUT     = "PUT"
+	HTTP_DELETE  = "DELETE"
+	HTTP_HEAD    = "HEAD"
+	HTTP_OPTIONS = "OPTIONS"
+
+	REQUEST_PAYER = "request-payer"
+	MULTI_AZ      = "3az"
+
+	MAX_PART_SIZE     = 5 * 1024 * 1024 * 1024
+	MIN_PART_SIZE     = 100 * 1024
+	DEFAULT_PART_SIZE = 9 * 1024 * 1024
+	MAX_PART_NUM      = 10000
+)
+
+// SignatureType defines type of signature
+type SignatureType string
+
+const (
+	// SignatureV2 signature type v2
+	SignatureV2 SignatureType = "v2"
+	// SignatureV4 signature type v4
+	SignatureV4 SignatureType = "v4"
+	// SignatureObs signature type OBS
+	SignatureObs SignatureType = "OBS"
+)
+
+var (
+	interestedHeaders = []string{"content-md5", "content-type", "date"}
+
+	allowedRequestHTTPHeaderMetadataNames = map[string]bool{
+		"content-type":                   true,
+		"content-md5":                    true,
+		"content-length":                 true,
+		"content-language":               true,
+		"expires":                        true,
+		"origin":                         true,
+		"cache-control":                  true,
+		"content-disposition":            true,
+		"content-encoding":               true,
+		"access-control-request-method":  true,
+		"access-control-request-headers": true,
+		"x-default-storage-class":        true,
+		"location":                       true,
+		"date":                           true,
+		"etag":                           true,
+		"range":                          true,
+		"host":                           true,
+		"if-modified-since":              true,
+		"if-unmodified-since":            true,
+		"if-match":                       true,
+		"if-none-match":                  true,
+		"last-modified":                  true,
+		"content-range":                  true,
+	}
+
+	allowedResourceParameterNames = map[string]bool{
+		"acl":                          true,
+		"backtosource":                 true,
+		"metadata":                     true,
+		"policy":                       true,
+		"torrent":                      true,
+		"logging":                      true,
+		"location":                     true,
+		"storageinfo":                  true,
+		"quota":                        true,
+		"storageclass":                 true,
+		"storagepolicy":                true,
+		"requestpayment":               true,
+		"versions":                     true,
+		"versioning":                   true,
+		"versionid":                    true,
+		"uploads":                      true,
+		"uploadid":                     true,
+		"partnumber":                   true,
+		"website":                      true,
+		"notification":                 true,
+		"lifecycle":                    true,
+		"deletebucket":                 true,
+		"delete":                       true,
+		"cors":                         true,
+		"restore":                      true,
+		"tagging":                      true,
+		"append":                       true,
+		"position":                     true,
+		"replication":                  true,
+		"response-content-type":        true,
+		"response-content-language":    true,
+		"response-expires":             true,
+		"response-cache-control":       true,
+		"response-content-disposition": true,
+		"response-content-encoding":    true,
+		"x-image-process":              true,
+		"x-oss-process":                true,
+		"x-image-save-bucket":          true,
+		"x-image-save-object":          true,
+		"ignore-sign-in-query":         true,
+	}
+
+	mimeTypes = map[string]string{
+		"001":     "application/x-001",
+		"301":     "application/x-301",
+		"323":     "text/h323",
+		"7z":      "application/x-7z-compressed",
+		"906":     "application/x-906",
+		"907":     "drawing/907",
+		"IVF":     "video/x-ivf",
+		"a11":     "application/x-a11",
+		"aac":     "audio/x-aac",
+		"acp":     "audio/x-mei-aac",
+		"ai":      "application/postscript",
+		"aif":     "audio/aiff",
+		"aifc":    "audio/aiff",
+		"aiff":    "audio/aiff",
+		"anv":     "application/x-anv",
+		"apk":     "application/vnd.android.package-archive",
+		"asa":     "text/asa",
+		"asf":     "video/x-ms-asf",
+		"asp":     "text/asp",
+		"asx":     "video/x-ms-asf",
+		"atom":    "application/atom+xml",
+		"au":      "audio/basic",
+		"avi":     "video/avi",
+		"awf":     "application/vnd.adobe.workflow",
+		"biz":     "text/xml",
+		"bmp":     "application/x-bmp",
+		"bot":     "application/x-bot",
+		"bz2":     "application/x-bzip2",
+		"c4t":     "application/x-c4t",
+		"c90":     "application/x-c90",
+		"cal":     "application/x-cals",
+		"cat":     "application/vnd.ms-pki.seccat",
+		"cdf":     "application/x-netcdf",
+		"cdr":     "application/x-cdr",
+		"cel":     "application/x-cel",
+		"cer":     "application/x-x509-ca-cert",
+		"cg4":     "application/x-g4",
+		"cgm":     "application/x-cgm",
+		"cit":     "application/x-cit",
+		"class":   "java/*",
+		"cml":     "text/xml",
+		"cmp":     "application/x-cmp",
+		"cmx":     "application/x-cmx",
+		"cot":     "application/x-cot",
+		"crl":     "application/pkix-crl",
+		"crt":     "application/x-x509-ca-cert",
+		"csi":     "application/x-csi",
+		"css":     "text/css",
+		"csv":     "text/csv",
+		"cu":      "application/cu-seeme",
+		"cut":     "application/x-cut",
+		"dbf":     "application/x-dbf",
+		"dbm":     "application/x-dbm",
+		"dbx":     "application/x-dbx",
+		"dcd":     "text/xml",
+		"dcx":     "application/x-dcx",
+		"deb":     "application/x-debian-package",
+		"der":     "application/x-x509-ca-cert",
+		"dgn":     "application/x-dgn",
+		"dib":     "application/x-dib",
+		"dll":     "application/x-msdownload",
+		"doc":     "application/msword",
+		"docx":    "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+		"dot":     "application/msword",
+		"drw":     "application/x-drw",
+		"dtd":     "text/xml",
+		"dvi":     "application/x-dvi",
+		"dwf":     "application/x-dwf",
+		"dwg":     "application/x-dwg",
+		"dxb":     "application/x-dxb",
+		"dxf":     "application/x-dxf",
+		"edn":     "application/vnd.adobe.edn",
+		"emf":     "application/x-emf",
+		"eml":     "message/rfc822",
+		"ent":     "text/xml",
+		"eot":     "application/vnd.ms-fontobject",
+		"epi":     "application/x-epi",
+		"eps":     "application/postscript",
+		"epub":    "application/epub+zip",
+		"etd":     "application/x-ebx",
+		"etx":     "text/x-setext",
+		"exe":     "application/x-msdownload",
+		"fax":     "image/fax",
+		"fdf":     "application/vnd.fdf",
+		"fif":     "application/fractals",
+		"flac":    "audio/flac",
+		"flv":     "video/x-flv",
+		"fo":      "text/xml",
+		"frm":     "application/x-frm",
+		"g4":      "application/x-g4",
+		"gbr":     "application/x-gbr",
+		"gif":     "image/gif",
+		"gl2":     "application/x-gl2",
+		"gp4":     "application/x-gp4",
+		"gz":      "application/gzip",
+		"hgl":     "application/x-hgl",
+		"hmr":     "application/x-hmr",
+		"hpg":     "application/x-hpgl",
+		"hpl":     "application/x-hpl",
+		"hqx":     "application/mac-binhex40",
+		"hrf":     "application/x-hrf",
+		"hta":     "application/hta",
+		"htc":     "text/x-component",
+		"htm":     "text/html",
+		"html":    "text/html",
+		"htt":     "text/webviewhtml",
+		"htx":     "text/html",
+		"icb":     "application/x-icb",
+		"ico":     "application/x-ico",
+		"ics":     "text/calendar",
+		"iff":     "application/x-iff",
+		"ig4":     "application/x-g4",
+		"igs":     "application/x-igs",
+		"iii":     "application/x-iphone",
+		"img":     "application/x-img",
+		"ini":     "text/plain",
+		"ins":     "application/x-internet-signup",
+		"ipa":     "application/vnd.iphone",
+		"iso":     "application/x-iso9660-image",
+		"isp":     "application/x-internet-signup",
+		"jar":     "application/java-archive",
+		"java":    "java/*",
+		"jfif":    "image/jpeg",
+		"jpe":     "image/jpeg",
+		"jpeg":    "image/jpeg",
+		"jpg":     "image/jpeg",
+		"js":      "application/x-javascript",
+		"json":    "application/json",
+		"jsp":     "text/html",
+		"la1":     "audio/x-liquid-file",
+		"lar":     "application/x-laplayer-reg",
+		"latex":   "application/x-latex",
+		"lavs":    "audio/x-liquid-secure",
+		"lbm":     "application/x-lbm",
+		"lmsff":   "audio/x-la-lms",
+		"log":     "text/plain",
+		"ls":      "application/x-javascript",
+		"ltr":     "application/x-ltr",
+		"m1v":     "video/x-mpeg",
+		"m2v":     "video/x-mpeg",
+		"m3u":     "audio/mpegurl",
+		"m4a":     "audio/mp4",
+		"m4e":     "video/mpeg4",
+		"m4v":     "video/mp4",
+		"mac":     "application/x-mac",
+		"man":     "application/x-troff-man",
+		"math":    "text/xml",
+		"mdb":     "application/msaccess",
+		"mfp":     "application/x-shockwave-flash",
+		"mht":     "message/rfc822",
+		"mhtml":   "message/rfc822",
+		"mi":      "application/x-mi",
+		"mid":     "audio/mid",
+		"midi":    "audio/mid",
+		"mil":     "application/x-mil",
+		"mml":     "text/xml",
+		"mnd":     "audio/x-musicnet-download",
+		"mns":     "audio/x-musicnet-stream",
+		"mocha":   "application/x-javascript",
+		"mov":     "video/quicktime",
+		"movie":   "video/x-sgi-movie",
+		"mp1":     "audio/mp1",
+		"mp2":     "audio/mp2",
+		"mp2v":    "video/mpeg",
+		"mp3":     "audio/mp3",
+		"mp4":     "video/mp4",
+		"mp4a":    "audio/mp4",
+		"mp4v":    "video/mp4",
+		"mpa":     "video/x-mpg",
+		"mpd":     "application/vnd.ms-project",
+		"mpe":     "video/mpeg",
+		"mpeg":    "video/mpeg",
+		"mpg":     "video/mpeg",
+		"mpg4":    "video/mp4",
+		"mpga":    "audio/rn-mpeg",
+		"mpp":     "application/vnd.ms-project",
+		"mps":     "video/x-mpeg",
+		"mpt":     "application/vnd.ms-project",
+		"mpv":     "video/mpg",
+		"mpv2":    "video/mpeg",
+		"mpw":     "application/vnd.ms-project",
+		"mpx":     "application/vnd.ms-project",
+		"mtx":     "text/xml",
+		"mxp":     "application/x-mmxp",
+		"net":     "image/pnetvue",
+		"nrf":     "application/x-nrf",
+		"nws":     "message/rfc822",
+		"odc":     "text/x-ms-odc",
+		"oga":     "audio/ogg",
+		"ogg":     "audio/ogg",
+		"ogv":     "video/ogg",
+		"ogx":     "application/ogg",
+		"out":     "application/x-out",
+		"p10":     "application/pkcs10",
+		"p12":     "application/x-pkcs12",
+		"p7b":     "application/x-pkcs7-certificates",
+		"p7c":     "application/pkcs7-mime",
+		"p7m":     "application/pkcs7-mime",
+		"p7r":     "application/x-pkcs7-certreqresp",
+		"p7s":     "application/pkcs7-signature",
+		"pbm":     "image/x-portable-bitmap",
+		"pc5":     "application/x-pc5",
+		"pci":     "application/x-pci",
+		"pcl":     "application/x-pcl",
+		"pcx":     "application/x-pcx",
+		"pdf":     "application/pdf",
+		"pdx":     "application/vnd.adobe.pdx",
+		"pfx":     "application/x-pkcs12",
+		"pgl":     "application/x-pgl",
+		"pgm":     "image/x-portable-graymap",
+		"pic":     "application/x-pic",
+		"pko":     "application/vnd.ms-pki.pko",
+		"pl":      "application/x-perl",
+		"plg":     "text/html",
+		"pls":     "audio/scpls",
+		"plt":     "application/x-plt",
+		"png":     "image/png",
+		"pnm":     "image/x-portable-anymap",
+		"pot":     "application/vnd.ms-powerpoint",
+		"ppa":     "application/vnd.ms-powerpoint",
+		"ppm":     "application/x-ppm",
+		"pps":     "application/vnd.ms-powerpoint",
+		"ppt":     "application/vnd.ms-powerpoint",
+		"pptx":    "application/vnd.openxmlformats-officedocument.presentationml.presentation",
+		"pr":      "application/x-pr",
+		"prf":     "application/pics-rules",
+		"prn":     "application/x-prn",
+		"prt":     "application/x-prt",
+		"ps":      "application/postscript",
+		"ptn":     "application/x-ptn",
+		"pwz":     "application/vnd.ms-powerpoint",
+		"qt":      "video/quicktime",
+		"r3t":     "text/vnd.rn-realtext3d",
+		"ra":      "audio/vnd.rn-realaudio",
+		"ram":     "audio/x-pn-realaudio",
+		"rar":     "application/x-rar-compressed",
+		"ras":     "application/x-ras",
+		"rat":     "application/rat-file",
+		"rdf":     "text/xml",
+		"rec":     "application/vnd.rn-recording",
+		"red":     "application/x-red",
+		"rgb":     "application/x-rgb",
+		"rjs":     "application/vnd.rn-realsystem-rjs",
+		"rjt":     "application/vnd.rn-realsystem-rjt",
+		"rlc":     "application/x-rlc",
+		"rle":     "application/x-rle",
+		"rm":      "application/vnd.rn-realmedia",
+		"rmf":     "application/vnd.adobe.rmf",
+		"rmi":     "audio/mid",
+		"rmj":     "application/vnd.rn-realsystem-rmj",
+		"rmm":     "audio/x-pn-realaudio",
+		"rmp":     "application/vnd.rn-rn_music_package",
+		"rms":     "application/vnd.rn-realmedia-secure",
+		"rmvb":    "application/vnd.rn-realmedia-vbr",
+		"rmx":     "application/vnd.rn-realsystem-rmx",
+		"rnx":     "application/vnd.rn-realplayer",
+		"rp":      "image/vnd.rn-realpix",
+		"rpm":     "audio/x-pn-realaudio-plugin",
+		"rsml":    "application/vnd.rn-rsml",
+		"rss":     "application/rss+xml",
+		"rt":      "text/vnd.rn-realtext",
+		"rtf":     "application/x-rtf",
+		"rv":      "video/vnd.rn-realvideo",
+		"sam":     "application/x-sam",
+		"sat":     "application/x-sat",
+		"sdp":     "application/sdp",
+		"sdw":     "application/x-sdw",
+		"sgm":     "text/sgml",
+		"sgml":    "text/sgml",
+		"sis":     "application/vnd.symbian.install",
+		"sisx":    "application/vnd.symbian.install",
+		"sit":     "application/x-stuffit",
+		"slb":     "application/x-slb",
+		"sld":     "application/x-sld",
+		"slk":     "drawing/x-slk",
+		"smi":     "application/smil",
+		"smil":    "application/smil",
+		"smk":     "application/x-smk",
+		"snd":     "audio/basic",
+		"sol":     "text/plain",
+		"sor":     "text/plain",
+		"spc":     "application/x-pkcs7-certificates",
+		"spl":     "application/futuresplash",
+		"spp":     "text/xml",
+		"ssm":     "application/streamingmedia",
+		"sst":     "application/vnd.ms-pki.certstore",
+		"stl":     "application/vnd.ms-pki.stl",
+		"stm":     "text/html",
+		"sty":     "application/x-sty",
+		"svg":     "image/svg+xml",
+		"swf":     "application/x-shockwave-flash",
+		"tar":     "application/x-tar",
+		"tdf":     "application/x-tdf",
+		"tg4":     "application/x-tg4",
+		"tga":     "application/x-tga",
+		"tif":     "image/tiff",
+		"tiff":    "image/tiff",
+		"tld":     "text/xml",
+		"top":     "drawing/x-top",
+		"torrent": "application/x-bittorrent",
+		"tsd":     "text/xml",
+		"ttf":     "application/x-font-ttf",
+		"txt":     "text/plain",
+		"uin":     "application/x-icq",
+		"uls":     "text/iuls",
+		"vcf":     "text/x-vcard",
+		"vda":     "application/x-vda",
+		"vdx":     "application/vnd.visio",
+		"vml":     "text/xml",
+		"vpg":     "application/x-vpeg005",
+		"vsd":     "application/vnd.visio",
+		"vss":     "application/vnd.visio",
+		"vst":     "application/x-vst",
+		"vsw":     "application/vnd.visio",
+		"vsx":     "application/vnd.visio",
+		"vtx":     "application/vnd.visio",
+		"vxml":    "text/xml",
+		"wav":     "audio/wav",
+		"wax":     "audio/x-ms-wax",
+		"wb1":     "application/x-wb1",
+		"wb2":     "application/x-wb2",
+		"wb3":     "application/x-wb3",
+		"wbmp":    "image/vnd.wap.wbmp",
+		"webm":    "video/webm",
+		"wiz":     "application/msword",
+		"wk3":     "application/x-wk3",
+		"wk4":     "application/x-wk4",
+		"wkq":     "application/x-wkq",
+		"wks":     "application/x-wks",
+		"wm":      "video/x-ms-wm",
+		"wma":     "audio/x-ms-wma",
+		"wmd":     "application/x-ms-wmd",
+		"wmf":     "application/x-wmf",
+		"wml":     "text/vnd.wap.wml",
+		"wmv":     "video/x-ms-wmv",
+		"wmx":     "video/x-ms-wmx",
+		"wmz":     "application/x-ms-wmz",
+		"woff":    "application/x-font-woff",
+		"wp6":     "application/x-wp6",
+		"wpd":     "application/x-wpd",
+		"wpg":     "application/x-wpg",
+		"wpl":     "application/vnd.ms-wpl",
+		"wq1":     "application/x-wq1",
+		"wr1":     "application/x-wr1",
+		"wri":     "application/x-wri",
+		"wrk":     "application/x-wrk",
+		"ws":      "application/x-ws",
+		"ws2":     "application/x-ws",
+		"wsc":     "text/scriptlet",
+		"wsdl":    "text/xml",
+		"wvx":     "video/x-ms-wvx",
+		"x_b":     "application/x-x_b",
+		"x_t":     "application/x-x_t",
+		"xap":     "application/x-silverlight-app",
+		"xbm":     "image/x-xbitmap",
+		"xdp":     "application/vnd.adobe.xdp",
+		"xdr":     "text/xml",
+		"xfd":     "application/vnd.adobe.xfd",
+		"xfdf":    "application/vnd.adobe.xfdf",
+		"xhtml":   "text/html",
+		"xls":     "application/vnd.ms-excel",
+		"xlsx":    "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+		"xlw":     "application/x-xlw",
+		"xml":     "text/xml",
+		"xpl":     "audio/scpls",
+		"xpm":     "image/x-xpixmap",
+		"xq":      "text/xml",
+		"xql":     "text/xml",
+		"xquery":  "text/xml",
+		"xsd":     "text/xml",
+		"xsl":     "text/xml",
+		"xslt":    "text/xml",
+		"xwd":     "application/x-xwd",
+		"yaml":    "text/yaml",
+		"yml":     "text/yaml",
+		"zip":     "application/zip",
+	}
+)
+
+// HttpMethodType defines http method type
+type HttpMethodType string
+
+const (
+	HttpMethodGet     HttpMethodType = HTTP_GET
+	HttpMethodPut     HttpMethodType = HTTP_PUT
+	HttpMethodPost    HttpMethodType = HTTP_POST
+	HttpMethodDelete  HttpMethodType = HTTP_DELETE
+	HttpMethodHead    HttpMethodType = HTTP_HEAD
+	HttpMethodOptions HttpMethodType = HTTP_OPTIONS
+)
+
+// SubResourceType defines the subResource value
+type SubResourceType string
+
+const (
+	// SubResourceStoragePolicy subResource value: storagePolicy
+	SubResourceStoragePolicy SubResourceType = "storagePolicy"
+
+	// SubResourceStorageClass subResource value: storageClass
+	SubResourceStorageClass SubResourceType = "storageClass"
+
+	// SubResourceQuota subResource value: quota
+	SubResourceQuota SubResourceType = "quota"
+
+	// SubResourceStorageInfo subResource value: storageinfo
+	SubResourceStorageInfo SubResourceType = "storageinfo"
+
+	// SubResourceLocation subResource value: location
+	SubResourceLocation SubResourceType = "location"
+
+	// SubResourceAcl subResource value: acl
+	SubResourceAcl SubResourceType = "acl"
+
+	// SubResourcePolicy subResource value: policy
+	SubResourcePolicy SubResourceType = "policy"
+
+	// SubResourceCors subResource value: cors
+	SubResourceCors SubResourceType = "cors"
+
+	// SubResourceVersioning subResource value: versioning
+	SubResourceVersioning SubResourceType = "versioning"
+
+	// SubResourceWebsite subResource value: website
+	SubResourceWebsite SubResourceType = "website"
+
+	// SubResourceLogging subResource value: logging
+	SubResourceLogging SubResourceType = "logging"
+
+	// SubResourceLifecycle subResource value: lifecycle
+	SubResourceLifecycle SubResourceType = "lifecycle"
+
+	// SubResourceNotification subResource value: notification
+	SubResourceNotification SubResourceType = "notification"
+
+	// SubResourceTagging subResource value: tagging
+	SubResourceTagging SubResourceType = "tagging"
+
+	// SubResourceDelete subResource value: delete
+	SubResourceDelete SubResourceType = "delete"
+
+	// SubResourceVersions subResource value: versions
+	SubResourceVersions SubResourceType = "versions"
+
+	// SubResourceUploads subResource value: uploads
+	SubResourceUploads SubResourceType = "uploads"
+
+	// SubResourceRestore subResource value: restore
+	SubResourceRestore SubResourceType = "restore"
+
+	// SubResourceMetadata subResource value: metadata
+	SubResourceMetadata SubResourceType = "metadata"
+
+	// SubResourceRequestPayment subResource value: requestPayment
+	SubResourceRequestPayment SubResourceType = "requestPayment"
+)
+
+// objectKeyType defines the objectKey value
+type objectKeyType string
+
+const (
+	// objectKeyExtensionPolicy objectKey value: v1/extension_policy
+	objectKeyExtensionPolicy objectKeyType = "v1/extension_policy"
+
+	// objectKeyAsyncFetchJob objectKey value: v1/async-fetch/jobs
+	objectKeyAsyncFetchJob objectKeyType = "v1/async-fetch/jobs"
+)
+
+// AclType defines bucket/object acl type
+type AclType string
+
+const (
+	AclPrivate                 AclType = "private"
+	AclPublicRead              AclType = "public-read"
+	AclPublicReadWrite         AclType = "public-read-write"
+	AclAuthenticatedRead       AclType = "authenticated-read"
+	AclBucketOwnerRead         AclType = "bucket-owner-read"
+	AclBucketOwnerFullControl  AclType = "bucket-owner-full-control"
+	AclLogDeliveryWrite        AclType = "log-delivery-write"
+	AclPublicReadDelivery      AclType = "public-read-delivered"
+	AclPublicReadWriteDelivery AclType = "public-read-write-delivered"
+)
+
+// StorageClassType defines bucket storage class
+type StorageClassType string
+
+const (
+	//StorageClassStandard storage class: STANDARD
+	StorageClassStandard StorageClassType = "STANDARD"
+
+	//StorageClassWarm storage class: WARM
+	StorageClassWarm StorageClassType = "WARM"
+
+	//StorageClassCold storage class: COLD
+	StorageClassCold StorageClassType = "COLD"
+
+	storageClassStandardIA StorageClassType = "STANDARD_IA"
+	storageClassGlacier    StorageClassType = "GLACIER"
+)
+
+// PermissionType defines permission type
+type PermissionType string
+
+const (
+	// PermissionRead permission type: READ
+	PermissionRead PermissionType = "READ"
+
+	// PermissionWrite permission type: WRITE
+	PermissionWrite PermissionType = "WRITE"
+
+	// PermissionReadAcp permission type: READ_ACP
+	PermissionReadAcp PermissionType = "READ_ACP"
+
+	// PermissionWriteAcp permission type: WRITE_ACP
+	PermissionWriteAcp PermissionType = "WRITE_ACP"
+
+	// PermissionFullControl permission type: FULL_CONTROL
+	PermissionFullControl PermissionType = "FULL_CONTROL"
+)
+
+// GranteeType defines grantee type
+type GranteeType string
+
+const (
+	// GranteeGroup grantee type: Group
+	GranteeGroup GranteeType = "Group"
+
+	// GranteeUser grantee type: CanonicalUser
+	GranteeUser GranteeType = "CanonicalUser"
+)
+
+// GroupUriType defines grantee uri type
+type GroupUriType string
+
+const (
+	// GroupAllUsers grantee uri type: AllUsers
+	GroupAllUsers GroupUriType = "AllUsers"
+
+	// GroupAuthenticatedUsers grantee uri type: AuthenticatedUsers
+	GroupAuthenticatedUsers GroupUriType = "AuthenticatedUsers"
+
+	// GroupLogDelivery grantee uri type: LogDelivery
+	GroupLogDelivery GroupUriType = "LogDelivery"
+)
+
+// VersioningStatusType defines bucket version status
+type VersioningStatusType string
+
+const (
+	// VersioningStatusEnabled version status: Enabled
+	VersioningStatusEnabled VersioningStatusType = "Enabled"
+
+	// VersioningStatusSuspended version status: Suspended
+	VersioningStatusSuspended VersioningStatusType = "Suspended"
+)
+
+// ProtocolType defines protocol type
+type ProtocolType string
+
+const (
+	// ProtocolHttp prorocol type: http
+	ProtocolHttp ProtocolType = "http"
+
+	// ProtocolHttps prorocol type: https
+	ProtocolHttps ProtocolType = "https"
+)
+
+// RuleStatusType defines lifeCycle rule status
+type RuleStatusType string
+
+const (
+	// RuleStatusEnabled rule status: Enabled
+	RuleStatusEnabled RuleStatusType = "Enabled"
+
+	// RuleStatusDisabled rule status: Disabled
+	RuleStatusDisabled RuleStatusType = "Disabled"
+)
+
+// RestoreTierType defines restore options
+type RestoreTierType string
+
+const (
+	// RestoreTierExpedited restore options: Expedited
+	RestoreTierExpedited RestoreTierType = "Expedited"
+
+	// RestoreTierStandard restore options: Standard
+	RestoreTierStandard RestoreTierType = "Standard"
+
+	// RestoreTierBulk restore options: Bulk
+	RestoreTierBulk RestoreTierType = "Bulk"
+)
+
+// MetadataDirectiveType defines metadata operation indicator
+type MetadataDirectiveType string
+
+const (
+	// CopyMetadata metadata operation: COPY
+	CopyMetadata MetadataDirectiveType = "COPY"
+
+	// ReplaceNew metadata operation: REPLACE_NEW
+	ReplaceNew MetadataDirectiveType = "REPLACE_NEW"
+
+	// ReplaceMetadata metadata operation: REPLACE
+	ReplaceMetadata MetadataDirectiveType = "REPLACE"
+)
+
+// EventType defines bucket notification type of events
+type EventType string
+
+const (
+	// ObjectCreatedAll type of events: ObjectCreated:*
+	ObjectCreatedAll EventType = "ObjectCreated:*"
+
+	// ObjectCreatedPut type of events: ObjectCreated:Put
+	ObjectCreatedPut EventType = "ObjectCreated:Put"
+
+	// ObjectCreatedPost type of events: ObjectCreated:Post
+	ObjectCreatedPost EventType = "ObjectCreated:Post"
+
+	// ObjectCreatedCopy type of events: ObjectCreated:Copy
+	ObjectCreatedCopy EventType = "ObjectCreated:Copy"
+
+	// ObjectCreatedCompleteMultipartUpload type of events: ObjectCreated:CompleteMultipartUpload
+	ObjectCreatedCompleteMultipartUpload EventType = "ObjectCreated:CompleteMultipartUpload"
+
+	// ObjectRemovedAll type of events: ObjectRemoved:*
+	ObjectRemovedAll EventType = "ObjectRemoved:*"
+
+	// ObjectRemovedDelete type of events: ObjectRemoved:Delete
+	ObjectRemovedDelete EventType = "ObjectRemoved:Delete"
+
+	// ObjectRemovedDeleteMarkerCreated type of events: ObjectRemoved:DeleteMarkerCreated
+	ObjectRemovedDeleteMarkerCreated EventType = "ObjectRemoved:DeleteMarkerCreated"
+)
+
+// PayerType defines type of payer
+type PayerType string
+
+const (
+	// BucketOwnerPayer type of payer: BucketOwner
+	BucketOwnerPayer PayerType = "BucketOwner"
+
+	// RequesterPayer type of payer: Requester
+	RequesterPayer PayerType = "Requester"
+
+	// Requester header for requester-Pays
+	Requester PayerType = "requester"
+)
+
+// FetchPolicyStatusType defines type of fetch policy status
+type FetchPolicyStatusType string
+
+const (
+	// FetchStatusOpen type of status: open
+	FetchStatusOpen FetchPolicyStatusType = "open"
+
+	// FetchStatusClosed type of status: closed
+	FetchStatusClosed FetchPolicyStatusType = "closed"
+)

modules/obs/convert.go

@@ -0,0 +1,880 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:golint, unused
+package obs
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"reflect"
+	"strings"
+	"time"
+)
+
+func cleanHeaderPrefix(header http.Header) map[string][]string {
+	responseHeaders := make(map[string][]string)
+	for key, value := range header {
+		if len(value) > 0 {
+			key = strings.ToLower(key)
+			if strings.HasPrefix(key, HEADER_PREFIX) || strings.HasPrefix(key, HEADER_PREFIX_OBS) {
+				key = key[len(HEADER_PREFIX):]
+			}
+			responseHeaders[key] = value
+		}
+	}
+	return responseHeaders
+}
+
+// ParseStringToEventType converts string value to EventType value and returns it
+func ParseStringToEventType(value string) (ret EventType) {
+	switch value {
+	case "ObjectCreated:*", "s3:ObjectCreated:*":
+		ret = ObjectCreatedAll
+	case "ObjectCreated:Put", "s3:ObjectCreated:Put":
+		ret = ObjectCreatedPut
+	case "ObjectCreated:Post", "s3:ObjectCreated:Post":
+		ret = ObjectCreatedPost
+	case "ObjectCreated:Copy", "s3:ObjectCreated:Copy":
+		ret = ObjectCreatedCopy
+	case "ObjectCreated:CompleteMultipartUpload", "s3:ObjectCreated:CompleteMultipartUpload":
+		ret = ObjectCreatedCompleteMultipartUpload
+	case "ObjectRemoved:*", "s3:ObjectRemoved:*":
+		ret = ObjectRemovedAll
+	case "ObjectRemoved:Delete", "s3:ObjectRemoved:Delete":
+		ret = ObjectRemovedDelete
+	case "ObjectRemoved:DeleteMarkerCreated", "s3:ObjectRemoved:DeleteMarkerCreated":
+		ret = ObjectRemovedDeleteMarkerCreated
+	default:
+		ret = ""
+	}
+	return
+}
+
+// ParseStringToStorageClassType converts string value to StorageClassType value and returns it
+func ParseStringToStorageClassType(value string) (ret StorageClassType) {
+	switch value {
+	case "STANDARD":
+		ret = StorageClassStandard
+	case "STANDARD_IA", "WARM":
+		ret = StorageClassWarm
+	case "GLACIER", "COLD":
+		ret = StorageClassCold
+	default:
+		ret = ""
+	}
+	return
+}
+
+func prepareGrantURI(grant Grant) string {
+	if grant.Grantee.URI == GroupAllUsers || grant.Grantee.URI == GroupAuthenticatedUsers {
+		return fmt.Sprintf("<URI>%s%s</URI>", "http://acs.amazonaws.com/groups/global/", grant.Grantee.URI)
+	}
+	if grant.Grantee.URI == GroupLogDelivery {
+		return fmt.Sprintf("<URI>%s%s</URI>", "http://acs.amazonaws.com/groups/s3/", grant.Grantee.URI)
+	}
+	return fmt.Sprintf("<URI>%s</URI>", grant.Grantee.URI)
+}
+
+func convertGrantToXML(grant Grant, isObs bool, isBucket bool) string {
+	xml := make([]string, 0, 4)
+
+	if grant.Grantee.Type == GranteeUser {
+		if isObs {
+			xml = append(xml, "<Grant><Grantee>")
+		} else {
+			xml = append(xml, fmt.Sprintf("<Grant><Grantee xsi:type=\"%s\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">", grant.Grantee.Type))
+		}
+		if grant.Grantee.ID != "" {
+			granteeID := XmlTranscoding(grant.Grantee.ID)
+			xml = append(xml, fmt.Sprintf("<ID>%s</ID>", granteeID))
+		}
+		if !isObs && grant.Grantee.DisplayName != "" {
+			granteeDisplayName := XmlTranscoding(grant.Grantee.DisplayName)
+			xml = append(xml, fmt.Sprintf("<DisplayName>%s</DisplayName>", granteeDisplayName))
+		}
+		xml = append(xml, "</Grantee>")
+	} else {
+		if !isObs {
+			xml = append(xml, fmt.Sprintf("<Grant><Grantee xsi:type=\"%s\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">", grant.Grantee.Type))
+			xml = append(xml, prepareGrantURI(grant))
+			xml = append(xml, "</Grantee>")
+		} else if grant.Grantee.URI == GroupAllUsers {
+			xml = append(xml, "<Grant><Grantee>")
+			xml = append(xml, fmt.Sprintf("<Canned>Everyone</Canned>"))
+			xml = append(xml, "</Grantee>")
+		} else {
+			return strings.Join(xml, "")
+		}
+	}
+
+	xml = append(xml, fmt.Sprintf("<Permission>%s</Permission>", grant.Permission))
+	if isObs && isBucket {
+		xml = append(xml, fmt.Sprintf("<Delivered>%t</Delivered>", grant.Delivered))
+	}
+	xml = append(xml, fmt.Sprintf("</Grant>"))
+	return strings.Join(xml, "")
+}
+
+func hasLoggingTarget(input BucketLoggingStatus) bool {
+	if input.TargetBucket != "" || input.TargetPrefix != "" || len(input.TargetGrants) > 0 {
+		return true
+	}
+	return false
+}
+
+// ConvertLoggingStatusToXml converts BucketLoggingStatus value to XML data and returns it
+func ConvertLoggingStatusToXml(input BucketLoggingStatus, returnMd5 bool, isObs bool) (data string, md5 string) {
+	grantsLength := len(input.TargetGrants)
+	xml := make([]string, 0, 8+grantsLength)
+
+	xml = append(xml, "<BucketLoggingStatus>")
+	if isObs && input.Agency != "" {
+		agency := XmlTranscoding(input.Agency)
+		xml = append(xml, fmt.Sprintf("<Agency>%s</Agency>", agency))
+	}
+	if hasLoggingTarget(input) {
+		xml = append(xml, "<LoggingEnabled>")
+		if input.TargetBucket != "" {
+			xml = append(xml, fmt.Sprintf("<TargetBucket>%s</TargetBucket>", input.TargetBucket))
+		}
+		if input.TargetPrefix != "" {
+			targetPrefix := XmlTranscoding(input.TargetPrefix)
+			xml = append(xml, fmt.Sprintf("<TargetPrefix>%s</TargetPrefix>", targetPrefix))
+		}
+		if grantsLength > 0 {
+			xml = append(xml, "<TargetGrants>")
+			for _, grant := range input.TargetGrants {
+				xml = append(xml, convertGrantToXML(grant, isObs, false))
+			}
+			xml = append(xml, "</TargetGrants>")
+		}
+
+		xml = append(xml, "</LoggingEnabled>")
+	}
+	xml = append(xml, "</BucketLoggingStatus>")
+	data = strings.Join(xml, "")
+	if returnMd5 {
+		md5 = Base64Md5([]byte(data))
+	}
+	return
+}
+
+// ConvertAclToXml converts AccessControlPolicy value to XML data and returns it
+func ConvertAclToXml(input AccessControlPolicy, returnMd5 bool, isObs bool) (data string, md5 string) {
+	xml := make([]string, 0, 4+len(input.Grants))
+	ownerID := XmlTranscoding(input.Owner.ID)
+	xml = append(xml, fmt.Sprintf("<AccessControlPolicy><Owner><ID>%s</ID>", ownerID))
+	if !isObs && input.Owner.DisplayName != "" {
+		ownerDisplayName := XmlTranscoding(input.Owner.DisplayName)
+		xml = append(xml, fmt.Sprintf("<DisplayName>%s</DisplayName>", ownerDisplayName))
+	}
+	if isObs && input.Delivered != "" {
+		objectDelivered := XmlTranscoding(input.Delivered)
+		xml = append(xml, fmt.Sprintf("</Owner><Delivered>%s</Delivered><AccessControlList>", objectDelivered))
+	} else {
+		xml = append(xml, "</Owner><AccessControlList>")
+	}
+	for _, grant := range input.Grants {
+		xml = append(xml, convertGrantToXML(grant, isObs, false))
+	}
+	xml = append(xml, "</AccessControlList></AccessControlPolicy>")
+	data = strings.Join(xml, "")
+	if returnMd5 {
+		md5 = Base64Md5([]byte(data))
+	}
+	return
+}
+
+func convertBucketACLToXML(input AccessControlPolicy, returnMd5 bool, isObs bool) (data string, md5 string) {
+	xml := make([]string, 0, 4+len(input.Grants))
+	ownerID := XmlTranscoding(input.Owner.ID)
+	xml = append(xml, fmt.Sprintf("<AccessControlPolicy><Owner><ID>%s</ID>", ownerID))
+	if !isObs && input.Owner.DisplayName != "" {
+		ownerDisplayName := XmlTranscoding(input.Owner.DisplayName)
+		xml = append(xml, fmt.Sprintf("<DisplayName>%s</DisplayName>", ownerDisplayName))
+	}
+
+	xml = append(xml, "</Owner><AccessControlList>")
+
+	for _, grant := range input.Grants {
+		xml = append(xml, convertGrantToXML(grant, isObs, true))
+	}
+	xml = append(xml, "</AccessControlList></AccessControlPolicy>")
+	data = strings.Join(xml, "")
+	if returnMd5 {
+		md5 = Base64Md5([]byte(data))
+	}
+	return
+}
+
+func convertConditionToXML(condition Condition) string {
+	xml := make([]string, 0, 2)
+	if condition.KeyPrefixEquals != "" {
+		keyPrefixEquals := XmlTranscoding(condition.KeyPrefixEquals)
+		xml = append(xml, fmt.Sprintf("<KeyPrefixEquals>%s</KeyPrefixEquals>", keyPrefixEquals))
+	}
+	if condition.HttpErrorCodeReturnedEquals != "" {
+		xml = append(xml, fmt.Sprintf("<HttpErrorCodeReturnedEquals>%s</HttpErrorCodeReturnedEquals>", condition.HttpErrorCodeReturnedEquals))
+	}
+	if len(xml) > 0 {
+		return fmt.Sprintf("<Condition>%s</Condition>", strings.Join(xml, ""))
+	}
+	return ""
+}
+
+func prepareRoutingRule(input BucketWebsiteConfiguration) string {
+	xml := make([]string, 0, len(input.RoutingRules)*10)
+	for _, routingRule := range input.RoutingRules {
+		xml = append(xml, "<RoutingRule>")
+		xml = append(xml, "<Redirect>")
+		if routingRule.Redirect.Protocol != "" {
+			xml = append(xml, fmt.Sprintf("<Protocol>%s</Protocol>", routingRule.Redirect.Protocol))
+		}
+		if routingRule.Redirect.HostName != "" {
+			xml = append(xml, fmt.Sprintf("<HostName>%s</HostName>", routingRule.Redirect.HostName))
+		}
+		if routingRule.Redirect.ReplaceKeyPrefixWith != "" {
+			replaceKeyPrefixWith := XmlTranscoding(routingRule.Redirect.ReplaceKeyPrefixWith)
+			xml = append(xml, fmt.Sprintf("<ReplaceKeyPrefixWith>%s</ReplaceKeyPrefixWith>", replaceKeyPrefixWith))
+		}
+
+		if routingRule.Redirect.ReplaceKeyWith != "" {
+			replaceKeyWith := XmlTranscoding(routingRule.Redirect.ReplaceKeyWith)
+			xml = append(xml, fmt.Sprintf("<ReplaceKeyWith>%s</ReplaceKeyWith>", replaceKeyWith))
+		}
+		if routingRule.Redirect.HttpRedirectCode != "" {
+			xml = append(xml, fmt.Sprintf("<HttpRedirectCode>%s</HttpRedirectCode>", routingRule.Redirect.HttpRedirectCode))
+		}
+		xml = append(xml, "</Redirect>")
+
+		if ret := convertConditionToXML(routingRule.Condition); ret != "" {
+			xml = append(xml, ret)
+		}
+		xml = append(xml, "</RoutingRule>")
+	}
+	return strings.Join(xml, "")
+}
+
+// ConvertWebsiteConfigurationToXml converts BucketWebsiteConfiguration value to XML data and returns it
+func ConvertWebsiteConfigurationToXml(input BucketWebsiteConfiguration, returnMd5 bool) (data string, md5 string) {
+	routingRuleLength := len(input.RoutingRules)
+	xml := make([]string, 0, 6+routingRuleLength*10)
+	xml = append(xml, "<WebsiteConfiguration>")
+
+	if input.RedirectAllRequestsTo.HostName != "" {
+		xml = append(xml, fmt.Sprintf("<RedirectAllRequestsTo><HostName>%s</HostName>", input.RedirectAllRequestsTo.HostName))
+		if input.RedirectAllRequestsTo.Protocol != "" {
+			xml = append(xml, fmt.Sprintf("<Protocol>%s</Protocol>", input.RedirectAllRequestsTo.Protocol))
+		}
+		xml = append(xml, "</RedirectAllRequestsTo>")
+	} else {
+		if input.IndexDocument.Suffix != "" {
+			indexDocumentSuffix := XmlTranscoding(input.IndexDocument.Suffix)
+			xml = append(xml, fmt.Sprintf("<IndexDocument><Suffix>%s</Suffix></IndexDocument>", indexDocumentSuffix))
+		}
+		if input.ErrorDocument.Key != "" {
+			errorDocumentKey := XmlTranscoding(input.ErrorDocument.Key)
+			xml = append(xml, fmt.Sprintf("<ErrorDocument><Key>%s</Key></ErrorDocument>", errorDocumentKey))
+		}
+		if routingRuleLength > 0 {
+			xml = append(xml, "<RoutingRules>")
+			xml = append(xml, prepareRoutingRule(input))
+			xml = append(xml, "</RoutingRules>")
+		}
+	}
+
+	xml = append(xml, "</WebsiteConfiguration>")
+	data = strings.Join(xml, "")
+	if returnMd5 {
+		md5 = Base64Md5([]byte(data))
+	}
+	return
+}
+
+func convertTransitionsToXML(transitions []Transition, isObs bool) string {
+	if length := len(transitions); length > 0 {
+		xml := make([]string, 0, length)
+		for _, transition := range transitions {
+			var temp string
+			if transition.Days > 0 {
+				temp = fmt.Sprintf("<Days>%d</Days>", transition.Days)
+			} else if !transition.Date.IsZero() {
+				temp = fmt.Sprintf("<Date>%s</Date>", transition.Date.UTC().Format(ISO8601_MIDNIGHT_DATE_FORMAT))
+			}
+			if temp != "" {
+				if !isObs {
+					storageClass := string(transition.StorageClass)
+					if transition.StorageClass == StorageClassWarm {
+						storageClass = string(storageClassStandardIA)
+					} else if transition.StorageClass == StorageClassCold {
+						storageClass = string(storageClassGlacier)
+					}
+					xml = append(xml, fmt.Sprintf("<Transition>%s<StorageClass>%s</StorageClass></Transition>", temp, storageClass))
+				} else {
+					xml = append(xml, fmt.Sprintf("<Transition>%s<StorageClass>%s</StorageClass></Transition>", temp, transition.StorageClass))
+				}
+			}
+		}
+		return strings.Join(xml, "")
+	}
+	return ""
+}
+
+func convertExpirationToXML(expiration Expiration) string {
+	if expiration.Days > 0 {
+		return fmt.Sprintf("<Expiration><Days>%d</Days></Expiration>", expiration.Days)
+	} else if !expiration.Date.IsZero() {
+		return fmt.Sprintf("<Expiration><Date>%s</Date></Expiration>", expiration.Date.UTC().Format(ISO8601_MIDNIGHT_DATE_FORMAT))
+	}
+	return ""
+}
+func convertNoncurrentVersionTransitionsToXML(noncurrentVersionTransitions []NoncurrentVersionTransition, isObs bool) string {
+	if length := len(noncurrentVersionTransitions); length > 0 {
+		xml := make([]string, 0, length)
+		for _, noncurrentVersionTransition := range noncurrentVersionTransitions {
+			if noncurrentVersionTransition.NoncurrentDays > 0 {
+				storageClass := string(noncurrentVersionTransition.StorageClass)
+				if !isObs {
+					if storageClass == string(StorageClassWarm) {
+						storageClass = string(storageClassStandardIA)
+					} else if storageClass == string(StorageClassCold) {
+						storageClass = string(storageClassGlacier)
+					}
+				}
+				xml = append(xml, fmt.Sprintf("<NoncurrentVersionTransition><NoncurrentDays>%d</NoncurrentDays>"+
+					"<StorageClass>%s</StorageClass></NoncurrentVersionTransition>",
+					noncurrentVersionTransition.NoncurrentDays, storageClass))
+			}
+		}
+		return strings.Join(xml, "")
+	}
+	return ""
+}
+func convertNoncurrentVersionExpirationToXML(noncurrentVersionExpiration NoncurrentVersionExpiration) string {
+	if noncurrentVersionExpiration.NoncurrentDays > 0 {
+		return fmt.Sprintf("<NoncurrentVersionExpiration><NoncurrentDays>%d</NoncurrentDays></NoncurrentVersionExpiration>", noncurrentVersionExpiration.NoncurrentDays)
+	}
+	return ""
+}
+
+// ConvertLifecyleConfigurationToXml converts BucketLifecyleConfiguration value to XML data and returns it
+func ConvertLifecyleConfigurationToXml(input BucketLifecyleConfiguration, returnMd5 bool, isObs bool) (data string, md5 string) {
+	xml := make([]string, 0, 2+len(input.LifecycleRules)*9)
+	xml = append(xml, "<LifecycleConfiguration>")
+	for _, lifecyleRule := range input.LifecycleRules {
+		xml = append(xml, "<Rule>")
+		if lifecyleRule.ID != "" {
+			lifecyleRuleID := XmlTranscoding(lifecyleRule.ID)
+			xml = append(xml, fmt.Sprintf("<ID>%s</ID>", lifecyleRuleID))
+		}
+		lifecyleRulePrefix := XmlTranscoding(lifecyleRule.Prefix)
+		xml = append(xml, fmt.Sprintf("<Prefix>%s</Prefix>", lifecyleRulePrefix))
+		xml = append(xml, fmt.Sprintf("<Status>%s</Status>", lifecyleRule.Status))
+		if ret := convertTransitionsToXML(lifecyleRule.Transitions, isObs); ret != "" {
+			xml = append(xml, ret)
+		}
+		if ret := convertExpirationToXML(lifecyleRule.Expiration); ret != "" {
+			xml = append(xml, ret)
+		}
+		if ret := convertNoncurrentVersionTransitionsToXML(lifecyleRule.NoncurrentVersionTransitions, isObs); ret != "" {
+			xml = append(xml, ret)
+		}
+		if ret := convertNoncurrentVersionExpirationToXML(lifecyleRule.NoncurrentVersionExpiration); ret != "" {
+			xml = append(xml, ret)
+		}
+		xml = append(xml, "</Rule>")
+	}
+	xml = append(xml, "</LifecycleConfiguration>")
+	data = strings.Join(xml, "")
+	if returnMd5 {
+		md5 = Base64Md5([]byte(data))
+	}
+	return
+}
+
+func converntFilterRulesToXML(filterRules []FilterRule, isObs bool) string {
+	if length := len(filterRules); length > 0 {
+		xml := make([]string, 0, length*4)
+		for _, filterRule := range filterRules {
+			xml = append(xml, "<FilterRule>")
+			if filterRule.Name != "" {
+				filterRuleName := XmlTranscoding(filterRule.Name)
+				xml = append(xml, fmt.Sprintf("<Name>%s</Name>", filterRuleName))
+			}
+			if filterRule.Value != "" {
+				filterRuleValue := XmlTranscoding(filterRule.Value)
+				xml = append(xml, fmt.Sprintf("<Value>%s</Value>", filterRuleValue))
+			}
+			xml = append(xml, "</FilterRule>")
+		}
+		if !isObs {
+			return fmt.Sprintf("<Filter><S3Key>%s</S3Key></Filter>", strings.Join(xml, ""))
+		}
+		return fmt.Sprintf("<Filter><Object>%s</Object></Filter>", strings.Join(xml, ""))
+	}
+	return ""
+}
+
+func converntEventsToXML(events []EventType, isObs bool) string {
+	if length := len(events); length > 0 {
+		xml := make([]string, 0, length)
+		if !isObs {
+			for _, event := range events {
+				xml = append(xml, fmt.Sprintf("<Event>%s%s</Event>", "s3:", event))
+			}
+		} else {
+			for _, event := range events {
+				xml = append(xml, fmt.Sprintf("<Event>%s</Event>", event))
+			}
+		}
+		return strings.Join(xml, "")
+	}
+	return ""
+}
+
+func converntConfigureToXML(topicConfiguration TopicConfiguration, xmlElem string, isObs bool) string {
+	xml := make([]string, 0, 6)
+	xml = append(xml, xmlElem)
+	if topicConfiguration.ID != "" {
+		topicConfigurationID := XmlTranscoding(topicConfiguration.ID)
+		xml = append(xml, fmt.Sprintf("<Id>%s</Id>", topicConfigurationID))
+	}
+	topicConfigurationTopic := XmlTranscoding(topicConfiguration.Topic)
+	xml = append(xml, fmt.Sprintf("<Topic>%s</Topic>", topicConfigurationTopic))
+
+	if ret := converntEventsToXML(topicConfiguration.Events, isObs); ret != "" {
+		xml = append(xml, ret)
+	}
+	if ret := converntFilterRulesToXML(topicConfiguration.FilterRules, isObs); ret != "" {
+		xml = append(xml, ret)
+	}
+	tempElem := xmlElem[0:1] + "/" + xmlElem[1:]
+	xml = append(xml, tempElem)
+	return strings.Join(xml, "")
+}
+
+// ConverntObsRestoreToXml converts RestoreObjectInput value to XML data and returns it
+func ConverntObsRestoreToXml(restoreObjectInput RestoreObjectInput) string {
+	xml := make([]string, 0, 2)
+	xml = append(xml, fmt.Sprintf("<RestoreRequest><Days>%d</Days>", restoreObjectInput.Days))
+	if restoreObjectInput.Tier != "Bulk" {
+		xml = append(xml, fmt.Sprintf("<RestoreJob><Tier>%s</Tier></RestoreJob>", restoreObjectInput.Tier))
+	}
+	xml = append(xml, fmt.Sprintf("</RestoreRequest>"))
+	data := strings.Join(xml, "")
+	return data
+}
+
+// ConvertNotificationToXml converts BucketNotification value to XML data and returns it
+func ConvertNotificationToXml(input BucketNotification, returnMd5 bool, isObs bool) (data string, md5 string) {
+	xml := make([]string, 0, 2+len(input.TopicConfigurations)*6)
+	xml = append(xml, "<NotificationConfiguration>")
+	for _, topicConfiguration := range input.TopicConfigurations {
+		ret := converntConfigureToXML(topicConfiguration, "<TopicConfiguration>", isObs)
+		xml = append(xml, ret)
+	}
+	xml = append(xml, "</NotificationConfiguration>")
+	data = strings.Join(xml, "")
+	if returnMd5 {
+		md5 = Base64Md5([]byte(data))
+	}
+	return
+}
+
+// ConvertCompleteMultipartUploadInputToXml converts CompleteMultipartUploadInput value to XML data and returns it
+func ConvertCompleteMultipartUploadInputToXml(input CompleteMultipartUploadInput, returnMd5 bool) (data string, md5 string) {
+	xml := make([]string, 0, 2+len(input.Parts)*4)
+	xml = append(xml, "<CompleteMultipartUpload>")
+	for _, part := range input.Parts {
+		xml = append(xml, "<Part>")
+		xml = append(xml, fmt.Sprintf("<PartNumber>%d</PartNumber>", part.PartNumber))
+		xml = append(xml, fmt.Sprintf("<ETag>%s</ETag>", part.ETag))
+		xml = append(xml, "</Part>")
+	}
+	xml = append(xml, "</CompleteMultipartUpload>")
+	data = strings.Join(xml, "")
+	if returnMd5 {
+		md5 = Base64Md5([]byte(data))
+	}
+	return
+}
+
+func parseSseHeader(responseHeaders map[string][]string) (sseHeader ISseHeader) {
+	if ret, ok := responseHeaders[HEADER_SSEC_ENCRYPTION]; ok {
+		sseCHeader := SseCHeader{Encryption: ret[0]}
+		if ret, ok = responseHeaders[HEADER_SSEC_KEY_MD5]; ok {
+			sseCHeader.KeyMD5 = ret[0]
+		}
+		sseHeader = sseCHeader
+	} else if ret, ok := responseHeaders[HEADER_SSEKMS_ENCRYPTION]; ok {
+		sseKmsHeader := SseKmsHeader{Encryption: ret[0]}
+		if ret, ok = responseHeaders[HEADER_SSEKMS_KEY]; ok {
+			sseKmsHeader.Key = ret[0]
+		} else if ret, ok = responseHeaders[HEADER_SSEKMS_ENCRYPT_KEY_OBS]; ok {
+			sseKmsHeader.Key = ret[0]
+		}
+		sseHeader = sseKmsHeader
+	}
+	return
+}
+
+func parseCorsHeader(output BaseModel) (AllowOrigin, AllowHeader, AllowMethod, ExposeHeader string, MaxAgeSeconds int) {
+	if ret, ok := output.ResponseHeaders[HEADER_ACCESS_CONRTOL_ALLOW_ORIGIN]; ok {
+		AllowOrigin = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_ACCESS_CONRTOL_ALLOW_HEADERS]; ok {
+		AllowHeader = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_ACCESS_CONRTOL_MAX_AGE]; ok {
+		MaxAgeSeconds = StringToInt(ret[0], 0)
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_ACCESS_CONRTOL_ALLOW_METHODS]; ok {
+		AllowMethod = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_ACCESS_CONRTOL_EXPOSE_HEADERS]; ok {
+		ExposeHeader = ret[0]
+	}
+	return
+}
+
+func parseUnCommonHeader(output *GetObjectMetadataOutput) {
+	if ret, ok := output.ResponseHeaders[HEADER_VERSION_ID]; ok {
+		output.VersionId = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_WEBSITE_REDIRECT_LOCATION]; ok {
+		output.WebsiteRedirectLocation = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_EXPIRATION]; ok {
+		output.Expiration = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_RESTORE]; ok {
+		output.Restore = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_OBJECT_TYPE]; ok {
+		output.ObjectType = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_NEXT_APPEND_POSITION]; ok {
+		output.NextAppendPosition = ret[0]
+	}
+}
+
+// ParseGetObjectMetadataOutput sets GetObjectMetadataOutput field values with response headers
+func ParseGetObjectMetadataOutput(output *GetObjectMetadataOutput) {
+	output.AllowOrigin, output.AllowHeader, output.AllowMethod, output.ExposeHeader, output.MaxAgeSeconds = parseCorsHeader(output.BaseModel)
+	parseUnCommonHeader(output)
+	if ret, ok := output.ResponseHeaders[HEADER_STORAGE_CLASS2]; ok {
+		output.StorageClass = ParseStringToStorageClassType(ret[0])
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_ETAG]; ok {
+		output.ETag = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CONTENT_TYPE]; ok {
+		output.ContentType = ret[0]
+	}
+
+	output.SseHeader = parseSseHeader(output.ResponseHeaders)
+	if ret, ok := output.ResponseHeaders[HEADER_LASTMODIFIED]; ok {
+		ret, err := time.Parse(time.RFC1123, ret[0])
+		if err == nil {
+			output.LastModified = ret
+		}
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CONTENT_LENGTH]; ok {
+		output.ContentLength = StringToInt64(ret[0], 0)
+	}
+
+	output.Metadata = make(map[string]string)
+
+	for key, value := range output.ResponseHeaders {
+		if strings.HasPrefix(key, PREFIX_META) {
+			_key := key[len(PREFIX_META):]
+			output.ResponseHeaders[_key] = value
+			output.Metadata[_key] = value[0]
+			delete(output.ResponseHeaders, key)
+		}
+	}
+
+}
+
+// ParseCopyObjectOutput sets CopyObjectOutput field values with response headers
+func ParseCopyObjectOutput(output *CopyObjectOutput) {
+	if ret, ok := output.ResponseHeaders[HEADER_VERSION_ID]; ok {
+		output.VersionId = ret[0]
+	}
+	output.SseHeader = parseSseHeader(output.ResponseHeaders)
+	if ret, ok := output.ResponseHeaders[HEADER_COPY_SOURCE_VERSION_ID]; ok {
+		output.CopySourceVersionId = ret[0]
+	}
+}
+
+// ParsePutObjectOutput sets PutObjectOutput field values with response headers
+func ParsePutObjectOutput(output *PutObjectOutput) {
+	if ret, ok := output.ResponseHeaders[HEADER_VERSION_ID]; ok {
+		output.VersionId = ret[0]
+	}
+	output.SseHeader = parseSseHeader(output.ResponseHeaders)
+	if ret, ok := output.ResponseHeaders[HEADER_STORAGE_CLASS2]; ok {
+		output.StorageClass = ParseStringToStorageClassType(ret[0])
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_ETAG]; ok {
+		output.ETag = ret[0]
+	}
+}
+
+// ParseInitiateMultipartUploadOutput sets InitiateMultipartUploadOutput field values with response headers
+func ParseInitiateMultipartUploadOutput(output *InitiateMultipartUploadOutput) {
+	output.SseHeader = parseSseHeader(output.ResponseHeaders)
+}
+
+// ParseUploadPartOutput sets UploadPartOutput field values with response headers
+func ParseUploadPartOutput(output *UploadPartOutput) {
+	output.SseHeader = parseSseHeader(output.ResponseHeaders)
+	if ret, ok := output.ResponseHeaders[HEADER_ETAG]; ok {
+		output.ETag = ret[0]
+	}
+}
+
+// ParseCompleteMultipartUploadOutput sets CompleteMultipartUploadOutput field values with response headers
+func ParseCompleteMultipartUploadOutput(output *CompleteMultipartUploadOutput) {
+	output.SseHeader = parseSseHeader(output.ResponseHeaders)
+	if ret, ok := output.ResponseHeaders[HEADER_VERSION_ID]; ok {
+		output.VersionId = ret[0]
+	}
+}
+
+// ParseCopyPartOutput sets CopyPartOutput field values with response headers
+func ParseCopyPartOutput(output *CopyPartOutput) {
+	output.SseHeader = parseSseHeader(output.ResponseHeaders)
+}
+
+// ParseGetBucketMetadataOutput sets GetBucketMetadataOutput field values with response headers
+func ParseGetBucketMetadataOutput(output *GetBucketMetadataOutput) {
+	output.AllowOrigin, output.AllowHeader, output.AllowMethod, output.ExposeHeader, output.MaxAgeSeconds = parseCorsHeader(output.BaseModel)
+	if ret, ok := output.ResponseHeaders[HEADER_STORAGE_CLASS]; ok {
+		output.StorageClass = ParseStringToStorageClassType(ret[0])
+	} else if ret, ok := output.ResponseHeaders[HEADER_STORAGE_CLASS2]; ok {
+		output.StorageClass = ParseStringToStorageClassType(ret[0])
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_VERSION_OBS]; ok {
+		output.Version = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_BUCKET_REGION]; ok {
+		output.Location = ret[0]
+	} else if ret, ok := output.ResponseHeaders[HEADER_BUCKET_LOCATION_OBS]; ok {
+		output.Location = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_EPID_HEADERS]; ok {
+		output.Epid = ret[0]
+	}
+}
+
+func parseContentHeader(output *SetObjectMetadataOutput) {
+	if ret, ok := output.ResponseHeaders[HEADER_CONTENT_DISPOSITION]; ok {
+		output.ContentDisposition = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CONTENT_ENCODING]; ok {
+		output.ContentEncoding = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CONTENT_LANGUAGE]; ok {
+		output.ContentLanguage = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CONTENT_TYPE]; ok {
+		output.ContentType = ret[0]
+	}
+}
+
+// ParseSetObjectMetadataOutput sets SetObjectMetadataOutput field values with response headers
+func ParseSetObjectMetadataOutput(output *SetObjectMetadataOutput) {
+	if ret, ok := output.ResponseHeaders[HEADER_STORAGE_CLASS]; ok {
+		output.StorageClass = ParseStringToStorageClassType(ret[0])
+	} else if ret, ok := output.ResponseHeaders[HEADER_STORAGE_CLASS2]; ok {
+		output.StorageClass = ParseStringToStorageClassType(ret[0])
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_METADATA_DIRECTIVE]; ok {
+		output.MetadataDirective = MetadataDirectiveType(ret[0])
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CACHE_CONTROL]; ok {
+		output.CacheControl = ret[0]
+	}
+	parseContentHeader(output)
+	if ret, ok := output.ResponseHeaders[HEADER_EXPIRES]; ok {
+		output.Expires = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_WEBSITE_REDIRECT_LOCATION]; ok {
+		output.WebsiteRedirectLocation = ret[0]
+	}
+	output.Metadata = make(map[string]string)
+
+	for key, value := range output.ResponseHeaders {
+		if strings.HasPrefix(key, PREFIX_META) {
+			_key := key[len(PREFIX_META):]
+			output.ResponseHeaders[_key] = value
+			output.Metadata[_key] = value[0]
+			delete(output.ResponseHeaders, key)
+		}
+	}
+}
+
+// ParseDeleteObjectOutput sets DeleteObjectOutput field values with response headers
+func ParseDeleteObjectOutput(output *DeleteObjectOutput) {
+	if versionID, ok := output.ResponseHeaders[HEADER_VERSION_ID]; ok {
+		output.VersionId = versionID[0]
+	}
+
+	if deleteMarker, ok := output.ResponseHeaders[HEADER_DELETE_MARKER]; ok {
+		output.DeleteMarker = deleteMarker[0] == "true"
+	}
+}
+
+// ParseGetObjectOutput sets GetObjectOutput field values with response headers
+func ParseGetObjectOutput(output *GetObjectOutput) {
+	ParseGetObjectMetadataOutput(&output.GetObjectMetadataOutput)
+	if ret, ok := output.ResponseHeaders[HEADER_DELETE_MARKER]; ok {
+		output.DeleteMarker = ret[0] == "true"
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CACHE_CONTROL]; ok {
+		output.CacheControl = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CONTENT_DISPOSITION]; ok {
+		output.ContentDisposition = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CONTENT_ENCODING]; ok {
+		output.ContentEncoding = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_CONTENT_LANGUAGE]; ok {
+		output.ContentLanguage = ret[0]
+	}
+	if ret, ok := output.ResponseHeaders[HEADER_EXPIRES]; ok {
+		output.Expires = ret[0]
+	}
+}
+
+// ConvertRequestToIoReaderV2 converts req to XML data
+func ConvertRequestToIoReaderV2(req interface{}) (io.Reader, string, error) {
+	data, err := TransToXml(req)
+	if err == nil {
+		if isDebugLogEnabled() {
+			doLog(LEVEL_DEBUG, "Do http request with data: %s", string(data))
+		}
+		return bytes.NewReader(data), Base64Md5(data), nil
+	}
+	return nil, "", err
+}
+
+// ConvertRequestToIoReader converts req to XML data
+func ConvertRequestToIoReader(req interface{}) (io.Reader, error) {
+	body, err := TransToXml(req)
+	if err == nil {
+		if isDebugLogEnabled() {
+			doLog(LEVEL_DEBUG, "Do http request with data: %s", string(body))
+		}
+		return bytes.NewReader(body), nil
+	}
+	return nil, err
+}
+
+// ParseResponseToBaseModel gets response from OBS
+func ParseResponseToBaseModel(resp *http.Response, baseModel IBaseModel, xmlResult bool, isObs bool) (err error) {
+	readCloser, ok := baseModel.(IReadCloser)
+	if !ok {
+		defer func() {
+			errMsg := resp.Body.Close()
+			if errMsg != nil {
+				doLog(LEVEL_WARN, "Failed to close response body")
+			}
+		}()
+		body, err := ioutil.ReadAll(resp.Body)
+		if err == nil && len(body) > 0 {
+			if xmlResult {
+				err = ParseXml(body, baseModel)
+			} else {
+				s := reflect.TypeOf(baseModel).Elem()
+				if reflect.TypeOf(baseModel).Elem().Name() == "GetBucketPolicyOutput" {
+					for i := 0; i < s.NumField(); i++ {
+						if s.Field(i).Tag == "json:\"body\"" {
+							reflect.ValueOf(baseModel).Elem().FieldByName(s.Field(i).Name).SetString(string(body))
+							break
+						}
+					}
+				} else {
+					err = parseJSON(body, baseModel)
+				}
+			}
+			if err != nil {
+				doLog(LEVEL_ERROR, "Unmarshal error: %v", err)
+			}
+		}
+	} else {
+		readCloser.setReadCloser(resp.Body)
+	}
+
+	baseModel.setStatusCode(resp.StatusCode)
+	responseHeaders := cleanHeaderPrefix(resp.Header)
+	baseModel.setResponseHeaders(responseHeaders)
+	if values, ok := responseHeaders[HEADER_REQUEST_ID]; ok {
+		baseModel.setRequestID(values[0])
+	}
+	return
+}
+
+// ParseResponseToObsError gets obsError from OBS
+func ParseResponseToObsError(resp *http.Response, isObs bool) error {
+	isJson := false
+	if contentType, ok := resp.Header[HEADER_CONTENT_TYPE_CAML]; ok {
+		jsonType, _ := mimeTypes["json"]
+		isJson = contentType[0] == jsonType
+	}
+	obsError := ObsError{}
+	respError := ParseResponseToBaseModel(resp, &obsError, !isJson, isObs)
+	if respError != nil {
+		doLog(LEVEL_WARN, "Parse response to BaseModel with error: %v", respError)
+	}
+	obsError.Status = resp.Status
+	return obsError
+}
+
+// convertFetchPolicyToJSON converts SetBucketFetchPolicyInput into json format
+func convertFetchPolicyToJSON(input SetBucketFetchPolicyInput) (data string, err error) {
+	fetch := map[string]SetBucketFetchPolicyInput{"fetch": input}
+	json, err := json.Marshal(fetch)
+	if err != nil {
+		return "", err
+	}
+	data = string(json)
+	return
+}
+
+// convertFetchJobToJSON converts SetBucketFetchJobInput into json format
+func convertFetchJobToJSON(input SetBucketFetchJobInput) (data string, err error) {
+	objectHeaders := make(map[string]string)
+	for key, value := range input.ObjectHeaders {
+		if value != "" {
+			_key := strings.ToLower(key)
+			if !strings.HasPrefix(key, HEADER_PREFIX_OBS) {
+				_key = HEADER_PREFIX_META_OBS + _key
+			}
+			objectHeaders[_key] = value
+		}
+	}
+	input.ObjectHeaders = objectHeaders
+	json, err := json.Marshal(input)
+	if err != nil {
+		return "", err
+	}
+	data = string(json)
+	return
+}

modules/obs/error.go

@@ -0,0 +1,35 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:golint, unused
+package obs
+
+import (
+	"encoding/xml"
+	"fmt"
+)
+
+// ObsError defines error response from OBS
+type ObsError struct {
+	BaseModel
+	Status   string
+	XMLName  xml.Name `xml:"Error"`
+	Code     string   `xml:"Code" json:"code"`
+	Message  string   `xml:"Message" json:"message"`
+	Resource string   `xml:"Resource"`
+	HostId   string   `xml:"HostId"`
+}
+
+func (err ObsError) Error() string {
+	return fmt.Sprintf("obs: service returned error: Status=%s, Code=%s, Message=%s, RequestId=%s",
+		err.Status, err.Code, err.Message, err.RequestId)
+}

modules/obs/extension.go

@@ -0,0 +1,37 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:golint, unused
+package obs
+
+import (
+	"fmt"
+	"strings"
+)
+
+type extensionOptions interface{}
+type extensionHeaders func(headers map[string][]string, isObs bool) error
+
+func setHeaderPrefix(key string, value string) extensionHeaders {
+	return func(headers map[string][]string, isObs bool) error {
+		if strings.TrimSpace(value) == "" {
+			return fmt.Errorf("set header %s with empty value", key)
+		}
+		setHeaders(headers, key, []string{value}, isObs)
+		return nil
+	}
+}
+
+// WithReqPaymentHeader sets header for requester-pays
+func WithReqPaymentHeader(requester PayerType) extensionHeaders {
+	return setHeaderPrefix(REQUEST_PAYER, string(requester))
+}

modules/obs/http.go

@@ -0,0 +1,566 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+package obs
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"math/rand"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"time"
+)
+
+func prepareHeaders(headers map[string][]string, meta bool, isObs bool) map[string][]string {
+	_headers := make(map[string][]string, len(headers))
+	if headers != nil {
+		for key, value := range headers {
+			key = strings.TrimSpace(key)
+			if key == "" {
+				continue
+			}
+			_key := strings.ToLower(key)
+			if _, ok := allowedRequestHTTPHeaderMetadataNames[_key]; !ok && !strings.HasPrefix(key, HEADER_PREFIX) && !strings.HasPrefix(key, HEADER_PREFIX_OBS) {
+				if !meta {
+					continue
+				}
+				if !isObs {
+					_key = HEADER_PREFIX_META + _key
+				} else {
+					_key = HEADER_PREFIX_META_OBS + _key
+				}
+			} else {
+				_key = key
+			}
+			_headers[_key] = value
+		}
+	}
+	return _headers
+}
+
+func (obsClient ObsClient) doActionWithoutBucket(action, method string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
+	return obsClient.doAction(action, method, "", "", input, output, true, true, extensions)
+}
+
+func (obsClient ObsClient) doActionWithBucketV2(action, method, bucketName string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
+	if strings.TrimSpace(bucketName) == "" && !obsClient.conf.cname {
+		return errors.New("Bucket is empty")
+	}
+	return obsClient.doAction(action, method, bucketName, "", input, output, false, true, extensions)
+}
+
+func (obsClient ObsClient) doActionWithBucket(action, method, bucketName string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
+	if strings.TrimSpace(bucketName) == "" && !obsClient.conf.cname {
+		return errors.New("Bucket is empty")
+	}
+	return obsClient.doAction(action, method, bucketName, "", input, output, true, true, extensions)
+}
+
+func (obsClient ObsClient) doActionWithBucketAndKey(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
+	return obsClient._doActionWithBucketAndKey(action, method, bucketName, objectKey, input, output, true, extensions)
+}
+
+func (obsClient ObsClient) doActionWithBucketAndKeyV2(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
+	if strings.TrimSpace(bucketName) == "" && !obsClient.conf.cname {
+		return errors.New("Bucket is empty")
+	}
+	if strings.TrimSpace(objectKey) == "" {
+		return errors.New("Key is empty")
+	}
+	return obsClient.doAction(action, method, bucketName, objectKey, input, output, false, true, extensions)
+}
+
+func (obsClient ObsClient) doActionWithBucketAndKeyUnRepeatable(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
+	return obsClient._doActionWithBucketAndKey(action, method, bucketName, objectKey, input, output, false, extensions)
+}
+
+func (obsClient ObsClient) _doActionWithBucketAndKey(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, repeatable bool, extensions []extensionOptions) error {
+	if strings.TrimSpace(bucketName) == "" && !obsClient.conf.cname {
+		return errors.New("Bucket is empty")
+	}
+	if strings.TrimSpace(objectKey) == "" {
+		return errors.New("Key is empty")
+	}
+	return obsClient.doAction(action, method, bucketName, objectKey, input, output, true, repeatable, extensions)
+}
+
+func (obsClient ObsClient) doAction(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, xmlResult bool, repeatable bool, extensions []extensionOptions) error {
+
+	var resp *http.Response
+	var respError error
+	doLog(LEVEL_INFO, "Enter method %s...", action)
+	start := GetCurrentTimestamp()
+
+	params, headers, data, err := input.trans(obsClient.conf.signature == SignatureObs)
+	if err != nil {
+		return err
+	}
+
+	if params == nil {
+		params = make(map[string]string)
+	}
+
+	if headers == nil {
+		headers = make(map[string][]string)
+	}
+
+	for _, extension := range extensions {
+		if extensionHeader, ok := extension.(extensionHeaders); ok {
+			_err := extensionHeader(headers, obsClient.conf.signature == SignatureObs)
+			if _err != nil {
+				doLog(LEVEL_WARN, fmt.Sprintf("set header with error: %v", _err))
+			}
+		} else {
+			doLog(LEVEL_WARN, "Unsupported extensionOptions")
+		}
+	}
+
+	switch method {
+	case HTTP_GET:
+		resp, respError = obsClient.doHTTPGet(bucketName, objectKey, params, headers, data, repeatable)
+	case HTTP_POST:
+		resp, respError = obsClient.doHTTPPost(bucketName, objectKey, params, headers, data, repeatable)
+	case HTTP_PUT:
+		resp, respError = obsClient.doHTTPPut(bucketName, objectKey, params, headers, data, repeatable)
+	case HTTP_DELETE:
+		resp, respError = obsClient.doHTTPDelete(bucketName, objectKey, params, headers, data, repeatable)
+	case HTTP_HEAD:
+		resp, respError = obsClient.doHTTPHead(bucketName, objectKey, params, headers, data, repeatable)
+	case HTTP_OPTIONS:
+		resp, respError = obsClient.doHTTPOptions(bucketName, objectKey, params, headers, data, repeatable)
+	default:
+		respError = errors.New("Unexpect http method error")
+	}
+	if respError == nil && output != nil {
+		respError = ParseResponseToBaseModel(resp, output, xmlResult, obsClient.conf.signature == SignatureObs)
+		if respError != nil {
+			doLog(LEVEL_WARN, "Parse response to BaseModel with error: %v", respError)
+		}
+	} else {
+		doLog(LEVEL_WARN, "Do http request with error: %v", respError)
+	}
+
+	if isDebugLogEnabled() {
+		doLog(LEVEL_DEBUG, "End method %s, obsclient cost %d ms", action, (GetCurrentTimestamp() - start))
+	}
+
+	return respError
+}
+
+func (obsClient ObsClient) doHTTPGet(bucketName, objectKey string, params map[string]string,
+	headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
+	return obsClient.doHTTP(HTTP_GET, bucketName, objectKey, params, prepareHeaders(headers, false, obsClient.conf.signature == SignatureObs), data, repeatable)
+}
+
+func (obsClient ObsClient) doHTTPHead(bucketName, objectKey string, params map[string]string,
+	headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
+	return obsClient.doHTTP(HTTP_HEAD, bucketName, objectKey, params, prepareHeaders(headers, false, obsClient.conf.signature == SignatureObs), data, repeatable)
+}
+
+func (obsClient ObsClient) doHTTPOptions(bucketName, objectKey string, params map[string]string,
+	headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
+	return obsClient.doHTTP(HTTP_OPTIONS, bucketName, objectKey, params, prepareHeaders(headers, false, obsClient.conf.signature == SignatureObs), data, repeatable)
+}
+
+func (obsClient ObsClient) doHTTPDelete(bucketName, objectKey string, params map[string]string,
+	headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
+	return obsClient.doHTTP(HTTP_DELETE, bucketName, objectKey, params, prepareHeaders(headers, false, obsClient.conf.signature == SignatureObs), data, repeatable)
+}
+
+func (obsClient ObsClient) doHTTPPut(bucketName, objectKey string, params map[string]string,
+	headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
+	return obsClient.doHTTP(HTTP_PUT, bucketName, objectKey, params, prepareHeaders(headers, true, obsClient.conf.signature == SignatureObs), data, repeatable)
+}
+
+func (obsClient ObsClient) doHTTPPost(bucketName, objectKey string, params map[string]string,
+	headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
+	return obsClient.doHTTP(HTTP_POST, bucketName, objectKey, params, prepareHeaders(headers, true, obsClient.conf.signature == SignatureObs), data, repeatable)
+}
+
+func (obsClient ObsClient) doHTTPWithSignedURL(action, method string, signedURL string, actualSignedRequestHeaders http.Header, data io.Reader, output IBaseModel, xmlResult bool) (respError error) {
+	req, err := http.NewRequest(method, signedURL, data)
+	if err != nil {
+		return err
+	}
+	if obsClient.conf.ctx != nil {
+		req = req.WithContext(obsClient.conf.ctx)
+	}
+	var resp *http.Response
+
+	var isSecurityToken bool
+	var securityToken string
+	var query []string
+	parmas := strings.Split(signedURL, "?")
+	if len(parmas) > 1 {
+		query = strings.Split(parmas[1], "&")
+		for _, value := range query {
+			if strings.HasPrefix(value, HEADER_STS_TOKEN_AMZ+"=") || strings.HasPrefix(value, HEADER_STS_TOKEN_OBS+"=") {
+				if value[len(HEADER_STS_TOKEN_AMZ)+1:] != "" {
+					securityToken = value[len(HEADER_STS_TOKEN_AMZ)+1:]
+					isSecurityToken = true
+				}
+			}
+		}
+	}
+	logSignedURL := signedURL
+	if isSecurityToken {
+		logSignedURL = strings.Replace(logSignedURL, securityToken, "******", -1)
+	}
+	doLog(LEVEL_INFO, "Do %s with signedUrl %s...", action, logSignedURL)
+
+	req.Header = actualSignedRequestHeaders
+	if value, ok := req.Header[HEADER_HOST_CAMEL]; ok {
+		req.Host = value[0]
+		delete(req.Header, HEADER_HOST_CAMEL)
+	} else if value, ok := req.Header[HEADER_HOST]; ok {
+		req.Host = value[0]
+		delete(req.Header, HEADER_HOST)
+	}
+
+	if value, ok := req.Header[HEADER_CONTENT_LENGTH_CAMEL]; ok {
+		req.ContentLength = StringToInt64(value[0], -1)
+		delete(req.Header, HEADER_CONTENT_LENGTH_CAMEL)
+	} else if value, ok := req.Header[HEADER_CONTENT_LENGTH]; ok {
+		req.ContentLength = StringToInt64(value[0], -1)
+		delete(req.Header, HEADER_CONTENT_LENGTH)
+	}
+
+	req.Header[HEADER_USER_AGENT_CAMEL] = []string{USER_AGENT}
+	start := GetCurrentTimestamp()
+	resp, err = obsClient.httpClient.Do(req)
+	if isInfoLogEnabled() {
+		doLog(LEVEL_INFO, "Do http request cost %d ms", (GetCurrentTimestamp() - start))
+	}
+
+	var msg interface{}
+	if err != nil {
+		respError = err
+		resp = nil
+	} else {
+		doLog(LEVEL_DEBUG, "Response headers: %v", resp.Header)
+		if resp.StatusCode >= 300 {
+			respError = ParseResponseToObsError(resp, obsClient.conf.signature == SignatureObs)
+			msg = resp.Status
+			resp = nil
+		} else {
+			if output != nil {
+				respError = ParseResponseToBaseModel(resp, output, xmlResult, obsClient.conf.signature == SignatureObs)
+			}
+			if respError != nil {
+				doLog(LEVEL_WARN, "Parse response to BaseModel with error: %v", respError)
+			}
+		}
+	}
+
+	if msg != nil {
+		doLog(LEVEL_ERROR, "Failed to send request with reason:%v", msg)
+	}
+
+	if isDebugLogEnabled() {
+		doLog(LEVEL_DEBUG, "End method %s, obsclient cost %d ms", action, (GetCurrentTimestamp() - start))
+	}
+
+	return
+}
+
+func (obsClient ObsClient) doHTTP(method, bucketName, objectKey string, params map[string]string,
+	headers map[string][]string, data interface{}, repeatable bool) (resp *http.Response, respError error) {
+
+	bucketName = strings.TrimSpace(bucketName)
+
+	method = strings.ToUpper(method)
+
+	var redirectURL string
+	var requestURL string
+	maxRetryCount := obsClient.conf.maxRetryCount
+	maxRedirectCount := obsClient.conf.maxRedirectCount
+
+	var _data io.Reader
+	if data != nil {
+		if dataStr, ok := data.(string); ok {
+			doLog(LEVEL_DEBUG, "Do http request with string: %s", dataStr)
+			headers["Content-Length"] = []string{IntToString(len(dataStr))}
+			_data = strings.NewReader(dataStr)
+		} else if dataByte, ok := data.([]byte); ok {
+			doLog(LEVEL_DEBUG, "Do http request with byte array")
+			headers["Content-Length"] = []string{IntToString(len(dataByte))}
+			_data = bytes.NewReader(dataByte)
+		} else if dataReader, ok := data.(io.Reader); ok {
+			_data = dataReader
+		} else {
+			doLog(LEVEL_WARN, "Data is not a valid io.Reader")
+			return nil, errors.New("Data is not a valid io.Reader")
+		}
+	}
+
+	var lastRequest *http.Request
+	redirectFlag := false
+	for i, redirectCount := 0, 0; i <= maxRetryCount; i++ {
+		if redirectURL != "" {
+			if !redirectFlag {
+				parsedRedirectURL, err := url.Parse(redirectURL)
+				if err != nil {
+					return nil, err
+				}
+				requestURL, err = obsClient.doAuth(method, bucketName, objectKey, params, headers, parsedRedirectURL.Host)
+				if err != nil {
+					return nil, err
+				}
+				if parsedRequestURL, err := url.Parse(requestURL); err != nil {
+					return nil, err
+				} else if parsedRequestURL.RawQuery != "" && parsedRedirectURL.RawQuery == "" {
+					redirectURL += "?" + parsedRequestURL.RawQuery
+				}
+			}
+			requestURL = redirectURL
+		} else {
+			var err error
+			requestURL, err = obsClient.doAuth(method, bucketName, objectKey, params, headers, "")
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		req, err := http.NewRequest(method, requestURL, _data)
+		if obsClient.conf.ctx != nil {
+			req = req.WithContext(obsClient.conf.ctx)
+		}
+		if err != nil {
+			return nil, err
+		}
+		doLog(LEVEL_DEBUG, "Do request with url [%s] and method [%s]", requestURL, method)
+
+		if isDebugLogEnabled() {
+			auth := headers[HEADER_AUTH_CAMEL]
+			delete(headers, HEADER_AUTH_CAMEL)
+
+			var isSecurityToken bool
+			var securityToken []string
+			if securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_AMZ]; isSecurityToken {
+				headers[HEADER_STS_TOKEN_AMZ] = []string{"******"}
+			} else if securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_OBS]; isSecurityToken {
+				headers[HEADER_STS_TOKEN_OBS] = []string{"******"}
+			}
+			doLog(LEVEL_DEBUG, "Request headers: %v", headers)
+			headers[HEADER_AUTH_CAMEL] = auth
+			if isSecurityToken {
+				if obsClient.conf.signature == SignatureObs {
+					headers[HEADER_STS_TOKEN_OBS] = securityToken
+				} else {
+					headers[HEADER_STS_TOKEN_AMZ] = securityToken
+				}
+			}
+		}
+
+		for key, value := range headers {
+			if key == HEADER_HOST_CAMEL {
+				req.Host = value[0]
+				delete(headers, key)
+			} else if key == HEADER_CONTENT_LENGTH_CAMEL {
+				req.ContentLength = StringToInt64(value[0], -1)
+				delete(headers, key)
+			} else {
+				req.Header[key] = value
+			}
+		}
+
+		lastRequest = req
+
+		req.Header[HEADER_USER_AGENT_CAMEL] = []string{USER_AGENT}
+
+		if lastRequest != nil {
+			req.Host = lastRequest.Host
+			req.ContentLength = lastRequest.ContentLength
+		}
+
+		start := GetCurrentTimestamp()
+		resp, err = obsClient.httpClient.Do(req)
+		if isInfoLogEnabled() {
+			doLog(LEVEL_INFO, "Do http request cost %d ms", (GetCurrentTimestamp() - start))
+		}
+
+		var msg interface{}
+		if err != nil {
+			msg = err
+			respError = err
+			resp = nil
+			if !repeatable {
+				break
+			}
+		} else {
+			doLog(LEVEL_DEBUG, "Response headers: %v", resp.Header)
+			if resp.StatusCode < 300 {
+				break
+			} else if !repeatable || (resp.StatusCode >= 400 && resp.StatusCode < 500) || resp.StatusCode == 304 {
+				respError = ParseResponseToObsError(resp, obsClient.conf.signature == SignatureObs)
+				resp = nil
+				break
+			} else if resp.StatusCode >= 300 && resp.StatusCode < 400 {
+				if location := resp.Header.Get(HEADER_LOCATION_CAMEL); location != "" && redirectCount < maxRedirectCount {
+					redirectURL = location
+					doLog(LEVEL_WARN, "Redirect request to %s", redirectURL)
+					msg = resp.Status
+					maxRetryCount++
+					redirectCount++
+					if resp.StatusCode == 302 && method == HTTP_GET {
+						redirectFlag = true
+					} else {
+						redirectFlag = false
+					}
+				} else {
+					respError = ParseResponseToObsError(resp, obsClient.conf.signature == SignatureObs)
+					resp = nil
+					break
+				}
+			} else {
+				msg = resp.Status
+			}
+		}
+		if i != maxRetryCount {
+			if resp != nil {
+				_err := resp.Body.Close()
+				if _err != nil {
+					doLog(LEVEL_WARN, "Failed to close resp body")
+				}
+				resp = nil
+			}
+			if _, ok := headers[HEADER_AUTH_CAMEL]; ok {
+				delete(headers, HEADER_AUTH_CAMEL)
+			}
+			doLog(LEVEL_WARN, "Failed to send request with reason:%v, will try again", msg)
+			if r, ok := _data.(*strings.Reader); ok {
+				_, err := r.Seek(0, 0)
+				if err != nil {
+					return nil, err
+				}
+			} else if r, ok := _data.(*bytes.Reader); ok {
+				_, err := r.Seek(0, 0)
+				if err != nil {
+					return nil, err
+				}
+			} else if r, ok := _data.(*fileReaderWrapper); ok {
+				fd, err := os.Open(r.filePath)
+				if err != nil {
+					return nil, err
+				}
+				defer func() {
+					errMsg := fd.Close()
+					if errMsg != nil {
+						doLog(LEVEL_WARN, "Failed to close with reason: %v", errMsg)
+					}
+				}()
+				fileReaderWrapper := &fileReaderWrapper{filePath: r.filePath}
+				fileReaderWrapper.mark = r.mark
+				fileReaderWrapper.reader = fd
+				fileReaderWrapper.totalCount = r.totalCount
+				_data = fileReaderWrapper
+				_, err = fd.Seek(r.mark, 0)
+				if err != nil {
+					return nil, err
+				}
+			} else if r, ok := _data.(*readerWrapper); ok {
+				_, err := r.seek(0, 0)
+				if err != nil {
+					return nil, err
+				}
+			}
+			time.Sleep(time.Duration(float64(i+2) * rand.Float64() * float64(time.Second)))
+		} else {
+			doLog(LEVEL_ERROR, "Failed to send request with reason:%v", msg)
+			if resp != nil {
+				respError = ParseResponseToObsError(resp, obsClient.conf.signature == SignatureObs)
+				resp = nil
+			}
+		}
+	}
+	return
+}
+
+type connDelegate struct {
+	conn          net.Conn
+	socketTimeout time.Duration
+	finalTimeout  time.Duration
+}
+
+func getConnDelegate(conn net.Conn, socketTimeout int, finalTimeout int) *connDelegate {
+	return &connDelegate{
+		conn:          conn,
+		socketTimeout: time.Second * time.Duration(socketTimeout),
+		finalTimeout:  time.Second * time.Duration(finalTimeout),
+	}
+}
+
+func (delegate *connDelegate) Read(b []byte) (n int, err error) {
+	setReadDeadlineErr := delegate.SetReadDeadline(time.Now().Add(delegate.socketTimeout))
+	flag := isDebugLogEnabled()
+
+	if setReadDeadlineErr != nil && flag {
+		doLog(LEVEL_DEBUG, "Failed to set read deadline with reason: %v, but it's ok", setReadDeadlineErr)
+	}
+
+	n, err = delegate.conn.Read(b)
+	setReadDeadlineErr = delegate.SetReadDeadline(time.Now().Add(delegate.finalTimeout))
+	if setReadDeadlineErr != nil && flag {
+		doLog(LEVEL_DEBUG, "Failed to set read deadline with reason: %v, but it's ok", setReadDeadlineErr)
+	}
+	return n, err
+}
+
+func (delegate *connDelegate) Write(b []byte) (n int, err error) {
+	setWriteDeadlineErr := delegate.SetWriteDeadline(time.Now().Add(delegate.socketTimeout))
+	flag := isDebugLogEnabled()
+	if setWriteDeadlineErr != nil && flag {
+		doLog(LEVEL_DEBUG, "Failed to set write deadline with reason: %v, but it's ok", setWriteDeadlineErr)
+	}
+
+	n, err = delegate.conn.Write(b)
+	finalTimeout := time.Now().Add(delegate.finalTimeout)
+	setWriteDeadlineErr = delegate.SetWriteDeadline(finalTimeout)
+	if setWriteDeadlineErr != nil && flag {
+		doLog(LEVEL_DEBUG, "Failed to set write deadline with reason: %v, but it's ok", setWriteDeadlineErr)
+	}
+	setReadDeadlineErr := delegate.SetReadDeadline(finalTimeout)
+	if setReadDeadlineErr != nil && flag {
+		doLog(LEVEL_DEBUG, "Failed to set read deadline with reason: %v, but it's ok", setReadDeadlineErr)
+	}
+	return n, err
+}
+
+func (delegate *connDelegate) Close() error {
+	return delegate.conn.Close()
+}
+
+func (delegate *connDelegate) LocalAddr() net.Addr {
+	return delegate.conn.LocalAddr()
+}
+
+func (delegate *connDelegate) RemoteAddr() net.Addr {
+	return delegate.conn.RemoteAddr()
+}
+
+func (delegate *connDelegate) SetDeadline(t time.Time) error {
+	return delegate.conn.SetDeadline(t)
+}
+
+func (delegate *connDelegate) SetReadDeadline(t time.Time) error {
+	return delegate.conn.SetReadDeadline(t)
+}
+
+func (delegate *connDelegate) SetWriteDeadline(t time.Time) error {
+	return delegate.conn.SetWriteDeadline(t)
+}

modules/obs/log.go

@@ -0,0 +1,317 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:golint, unused
+package obs
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"sync"
+)
+
+// Level defines the level of the log
+type Level int
+
+const (
+	LEVEL_OFF   Level = 500
+	LEVEL_ERROR Level = 400
+	LEVEL_WARN  Level = 300
+	LEVEL_INFO  Level = 200
+	LEVEL_DEBUG Level = 100
+)
+
+var logLevelMap = map[Level]string{
+	LEVEL_OFF:   "[OFF]: ",
+	LEVEL_ERROR: "[ERROR]: ",
+	LEVEL_WARN:  "[WARN]: ",
+	LEVEL_INFO:  "[INFO]: ",
+	LEVEL_DEBUG: "[DEBUG]: ",
+}
+
+type logConfType struct {
+	level        Level
+	logToConsole bool
+	logFullPath  string
+	maxLogSize   int64
+	backups      int
+}
+
+func getDefaultLogConf() logConfType {
+	return logConfType{
+		level:        LEVEL_WARN,
+		logToConsole: false,
+		logFullPath:  "",
+		maxLogSize:   1024 * 1024 * 30, //30MB
+		backups:      10,
+	}
+}
+
+var logConf logConfType
+
+type loggerWrapper struct {
+	fullPath   string
+	fd         *os.File
+	ch         chan string
+	wg         sync.WaitGroup
+	queue      []string
+	logger     *log.Logger
+	index      int
+	cacheCount int
+	closed     bool
+}
+
+func (lw *loggerWrapper) doInit() {
+	lw.queue = make([]string, 0, lw.cacheCount)
+	lw.logger = log.New(lw.fd, "", 0)
+	lw.ch = make(chan string, lw.cacheCount)
+	lw.wg.Add(1)
+	go lw.doWrite()
+}
+
+func (lw *loggerWrapper) rotate() {
+	stat, err := lw.fd.Stat()
+	if err != nil {
+		_err := lw.fd.Close()
+		if _err != nil {
+			doLog(LEVEL_WARN, "Failed to close file with reason: %v", _err)
+		}
+		panic(err)
+	}
+	if stat.Size() >= logConf.maxLogSize {
+		_err := lw.fd.Sync()
+		if _err != nil {
+			panic(err)
+		}
+		_err = lw.fd.Close()
+		if _err != nil {
+			doLog(LEVEL_WARN, "Failed to close file with reason: %v", _err)
+		}
+		if lw.index > logConf.backups {
+			lw.index = 1
+		}
+		_err = os.Rename(lw.fullPath, lw.fullPath+"."+IntToString(lw.index))
+		if _err != nil {
+			panic(err)
+		}
+		lw.index++
+
+		fd, err := os.OpenFile(lw.fullPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
+		if err != nil {
+			panic(err)
+		}
+		lw.fd = fd
+		lw.logger.SetOutput(lw.fd)
+	}
+}
+
+func (lw *loggerWrapper) doFlush() {
+	lw.rotate()
+	for _, m := range lw.queue {
+		lw.logger.Println(m)
+	}
+	err := lw.fd.Sync()
+	if err != nil {
+		panic(err)
+	}
+}
+
+func (lw *loggerWrapper) doClose() {
+	lw.closed = true
+	close(lw.ch)
+	lw.wg.Wait()
+}
+
+func (lw *loggerWrapper) doWrite() {
+	defer lw.wg.Done()
+	for {
+		msg, ok := <-lw.ch
+		if !ok {
+			lw.doFlush()
+			_err := lw.fd.Close()
+			if _err != nil {
+				doLog(LEVEL_WARN, "Failed to close file with reason: %v", _err)
+			}
+			break
+		}
+		if len(lw.queue) >= lw.cacheCount {
+			lw.doFlush()
+			lw.queue = make([]string, 0, lw.cacheCount)
+		}
+		lw.queue = append(lw.queue, msg)
+	}
+
+}
+
+func (lw *loggerWrapper) Printf(format string, v ...interface{}) {
+	if !lw.closed {
+		msg := fmt.Sprintf(format, v...)
+		lw.ch <- msg
+	}
+}
+
+var consoleLogger *log.Logger
+var fileLogger *loggerWrapper
+var lock = new(sync.RWMutex)
+
+func isDebugLogEnabled() bool {
+	return logConf.level <= LEVEL_DEBUG
+}
+
+func isErrorLogEnabled() bool {
+	return logConf.level <= LEVEL_ERROR
+}
+
+func isWarnLogEnabled() bool {
+	return logConf.level <= LEVEL_WARN
+}
+
+func isInfoLogEnabled() bool {
+	return logConf.level <= LEVEL_INFO
+}
+
+func reset() {
+	if fileLogger != nil {
+		fileLogger.doClose()
+		fileLogger = nil
+	}
+	consoleLogger = nil
+	logConf = getDefaultLogConf()
+}
+
+// InitLog enable logging function with default cacheCnt
+func InitLog(logFullPath string, maxLogSize int64, backups int, level Level, logToConsole bool) error {
+	return InitLogWithCacheCnt(logFullPath, maxLogSize, backups, level, logToConsole, 50)
+}
+
+// InitLogWithCacheCnt enable logging function
+func InitLogWithCacheCnt(logFullPath string, maxLogSize int64, backups int, level Level, logToConsole bool, cacheCnt int) error {
+	lock.Lock()
+	defer lock.Unlock()
+	if cacheCnt <= 0 {
+		cacheCnt = 50
+	}
+	reset()
+	if fullPath := strings.TrimSpace(logFullPath); fullPath != "" {
+		_fullPath, err := filepath.Abs(fullPath)
+		if err != nil {
+			return err
+		}
+
+		if !strings.HasSuffix(_fullPath, ".log") {
+			_fullPath += ".log"
+		}
+
+		stat, err := os.Stat(_fullPath)
+		if err == nil && stat.IsDir() {
+			return fmt.Errorf("logFullPath:[%s] is a directory", _fullPath)
+		} else if err = os.MkdirAll(filepath.Dir(_fullPath), os.ModePerm); err != nil {
+			return err
+		}
+
+		fd, err := os.OpenFile(_fullPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
+		if err != nil {
+			return err
+		}
+
+		if stat == nil {
+			stat, err = os.Stat(_fullPath)
+			if err != nil {
+				_err := fd.Close()
+				if _err != nil {
+					doLog(LEVEL_WARN, "Failed to close file with reason: %v", _err)
+				}
+				return err
+			}
+		}
+
+		prefix := stat.Name() + "."
+		index := 1
+		var timeIndex int64 = 0
+		walkFunc := func(path string, info os.FileInfo, err error) error {
+			if err == nil {
+				if name := info.Name(); strings.HasPrefix(name, prefix) {
+					if i := StringToInt(name[len(prefix):], 0); i >= index && info.ModTime().Unix() >= timeIndex {
+						timeIndex = info.ModTime().Unix()
+						index = i + 1
+					}
+				}
+			}
+			return err
+		}
+
+		if err = filepath.Walk(filepath.Dir(_fullPath), walkFunc); err != nil {
+			_err := fd.Close()
+			if _err != nil {
+				doLog(LEVEL_WARN, "Failed to close file with reason: %v", _err)
+			}
+			return err
+		}
+
+		fileLogger = &loggerWrapper{fullPath: _fullPath, fd: fd, index: index, cacheCount: cacheCnt, closed: false}
+		fileLogger.doInit()
+	}
+	if maxLogSize > 0 {
+		logConf.maxLogSize = maxLogSize
+	}
+	if backups > 0 {
+		logConf.backups = backups
+	}
+	logConf.level = level
+	if logToConsole {
+		consoleLogger = log.New(os.Stdout, "", log.LstdFlags)
+	}
+	return nil
+}
+
+// CloseLog disable logging and synchronize cache data to log files
+func CloseLog() {
+	if logEnabled() {
+		lock.Lock()
+		defer lock.Unlock()
+		reset()
+	}
+}
+
+func logEnabled() bool {
+	return consoleLogger != nil || fileLogger != nil
+}
+
+// DoLog writes log messages to the logger
+func DoLog(level Level, format string, v ...interface{}) {
+	doLog(level, format, v...)
+}
+
+func doLog(level Level, format string, v ...interface{}) {
+	if logEnabled() && logConf.level <= level {
+		msg := fmt.Sprintf(format, v...)
+		if _, file, line, ok := runtime.Caller(1); ok {
+			index := strings.LastIndex(file, "/")
+			if index >= 0 {
+				file = file[index+1:]
+			}
+			msg = fmt.Sprintf("%s:%d|%s", file, line, msg)
+		}
+		prefix := logLevelMap[level]
+		if consoleLogger != nil {
+			consoleLogger.Printf("%s%s", prefix, msg)
+		}
+		if fileLogger != nil {
+			nowDate := FormatUtcNow("2006-01-02T15:04:05Z")
+			fileLogger.Printf("%s %s%s", nowDate, prefix, msg)
+		}
+	}
+}

modules/obs/pool.go

@@ -0,0 +1,543 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:structcheck, unused
+//nolint:golint, unused
+package obs
+
+import (
+	"errors"
+	"fmt"
+	"runtime"
+	"sync"
+	"sync/atomic"
+	"time"
+)
+
+// Future defines interface with function: Get
+type Future interface {
+	Get() interface{}
+}
+
+// FutureResult for task result
+type FutureResult struct {
+	result     interface{}
+	resultChan chan interface{}
+	lock       sync.Mutex
+}
+
+type panicResult struct {
+	presult interface{}
+}
+
+func (f *FutureResult) checkPanic() interface{} {
+	if r, ok := f.result.(panicResult); ok {
+		panic(r.presult)
+	}
+	return f.result
+}
+
+// Get gets the task result
+func (f *FutureResult) Get() interface{} {
+	if f.resultChan == nil {
+		return f.checkPanic()
+	}
+	f.lock.Lock()
+	defer f.lock.Unlock()
+	if f.resultChan == nil {
+		return f.checkPanic()
+	}
+
+	f.result = <-f.resultChan
+	close(f.resultChan)
+	f.resultChan = nil
+	return f.checkPanic()
+}
+
+// Task defines interface with function: Run
+type Task interface {
+	Run() interface{}
+}
+
+type funcWrapper struct {
+	f func() interface{}
+}
+
+func (fw *funcWrapper) Run() interface{} {
+	if fw.f != nil {
+		return fw.f()
+	}
+	return nil
+}
+
+type taskWrapper struct {
+	t Task
+	f *FutureResult
+}
+
+func (tw *taskWrapper) Run() interface{} {
+	if tw.t != nil {
+		return tw.t.Run()
+	}
+	return nil
+}
+
+type signalTask struct {
+	id string
+}
+
+func (signalTask) Run() interface{} {
+	return nil
+}
+
+type worker struct {
+	name      string
+	taskQueue chan Task
+	wg        *sync.WaitGroup
+	pool      *RoutinePool
+}
+
+func runTask(t Task) {
+	if tw, ok := t.(*taskWrapper); ok {
+		defer func() {
+			if r := recover(); r != nil {
+				tw.f.resultChan <- panicResult{
+					presult: r,
+				}
+			}
+		}()
+		ret := t.Run()
+		tw.f.resultChan <- ret
+	} else {
+		t.Run()
+	}
+}
+
+func (*worker) runTask(t Task) {
+	runTask(t)
+}
+
+func (w *worker) start() {
+	go func() {
+		defer func() {
+			if w.wg != nil {
+				w.wg.Done()
+			}
+		}()
+		for {
+			task, ok := <-w.taskQueue
+			if !ok {
+				break
+			}
+			w.pool.AddCurrentWorkingCnt(1)
+			w.runTask(task)
+			w.pool.AddCurrentWorkingCnt(-1)
+			if w.pool.autoTuneWorker(w) {
+				break
+			}
+		}
+	}()
+}
+
+func (w *worker) release() {
+	w.taskQueue = nil
+	w.wg = nil
+	w.pool = nil
+}
+
+// Pool defines coroutine pool interface
+type Pool interface {
+	ShutDown()
+	Submit(t Task) (Future, error)
+	SubmitFunc(f func() interface{}) (Future, error)
+	Execute(t Task)
+	ExecuteFunc(f func() interface{})
+	GetMaxWorkerCnt() int64
+	AddMaxWorkerCnt(value int64) int64
+	GetCurrentWorkingCnt() int64
+	AddCurrentWorkingCnt(value int64) int64
+	GetWorkerCnt() int64
+	AddWorkerCnt(value int64) int64
+	EnableAutoTune()
+}
+
+type basicPool struct {
+	maxWorkerCnt      int64
+	workerCnt         int64
+	currentWorkingCnt int64
+	isShutDown        int32
+}
+
+// ErrTaskInvalid will be returned if the task is nil
+var ErrTaskInvalid = errors.New("Task is nil")
+
+func (pool *basicPool) GetCurrentWorkingCnt() int64 {
+	return atomic.LoadInt64(&pool.currentWorkingCnt)
+}
+
+func (pool *basicPool) AddCurrentWorkingCnt(value int64) int64 {
+	return atomic.AddInt64(&pool.currentWorkingCnt, value)
+}
+
+func (pool *basicPool) GetWorkerCnt() int64 {
+	return atomic.LoadInt64(&pool.workerCnt)
+}
+
+func (pool *basicPool) AddWorkerCnt(value int64) int64 {
+	return atomic.AddInt64(&pool.workerCnt, value)
+}
+
+func (pool *basicPool) GetMaxWorkerCnt() int64 {
+	return atomic.LoadInt64(&pool.maxWorkerCnt)
+}
+
+func (pool *basicPool) AddMaxWorkerCnt(value int64) int64 {
+	return atomic.AddInt64(&pool.maxWorkerCnt, value)
+}
+
+func (pool *basicPool) CompareAndSwapCurrentWorkingCnt(oldValue, newValue int64) bool {
+	return atomic.CompareAndSwapInt64(&pool.currentWorkingCnt, oldValue, newValue)
+}
+
+func (pool *basicPool) EnableAutoTune() {
+
+}
+
+// RoutinePool defines the coroutine pool struct
+type RoutinePool struct {
+	basicPool
+	taskQueue     chan Task
+	dispatchQueue chan Task
+	workers       map[string]*worker
+	cacheCnt      int
+	wg            *sync.WaitGroup
+	lock          *sync.Mutex
+	shutDownWg    *sync.WaitGroup
+	autoTune      int32
+}
+
+// ErrSubmitTimeout will be returned if submit task timeout when calling SubmitWithTimeout function
+var ErrSubmitTimeout = errors.New("Submit task timeout")
+
+// ErrPoolShutDown will be returned if RoutinePool is shutdown
+var ErrPoolShutDown = errors.New("RoutinePool is shutdown")
+
+// ErrTaskReject will be returned if submit task is rejected
+var ErrTaskReject = errors.New("Submit task is rejected")
+
+var closeQueue = signalTask{id: "closeQueue"}
+
+// NewRoutinePool creates a RoutinePool instance
+func NewRoutinePool(maxWorkerCnt, cacheCnt int) Pool {
+	if maxWorkerCnt <= 0 {
+		maxWorkerCnt = runtime.NumCPU()
+	}
+
+	pool := &RoutinePool{
+		cacheCnt:   cacheCnt,
+		wg:         new(sync.WaitGroup),
+		lock:       new(sync.Mutex),
+		shutDownWg: new(sync.WaitGroup),
+		autoTune:   0,
+	}
+	pool.isShutDown = 0
+	pool.maxWorkerCnt += int64(maxWorkerCnt)
+	if pool.cacheCnt <= 0 {
+		pool.taskQueue = make(chan Task)
+	} else {
+		pool.taskQueue = make(chan Task, pool.cacheCnt)
+	}
+	pool.workers = make(map[string]*worker, pool.maxWorkerCnt)
+	// dispatchQueue must not have length
+	pool.dispatchQueue = make(chan Task)
+	pool.dispatcher()
+
+	return pool
+}
+
+// EnableAutoTune sets the autoTune enabled
+func (pool *RoutinePool) EnableAutoTune() {
+	atomic.StoreInt32(&pool.autoTune, 1)
+}
+
+func (pool *RoutinePool) checkStatus(t Task) error {
+	if t == nil {
+		return ErrTaskInvalid
+	}
+
+	if atomic.LoadInt32(&pool.isShutDown) == 1 {
+		return ErrPoolShutDown
+	}
+	return nil
+}
+
+func (pool *RoutinePool) dispatcher() {
+	pool.shutDownWg.Add(1)
+	go func() {
+		for {
+			task, ok := <-pool.dispatchQueue
+			if !ok {
+				break
+			}
+
+			if task == closeQueue {
+				close(pool.taskQueue)
+				pool.shutDownWg.Done()
+				continue
+			}
+
+			if pool.GetWorkerCnt() < pool.GetMaxWorkerCnt() {
+				pool.addWorker()
+			}
+
+			pool.taskQueue <- task
+		}
+	}()
+}
+
+// AddMaxWorkerCnt sets the maxWorkerCnt field's value and returns it
+func (pool *RoutinePool) AddMaxWorkerCnt(value int64) int64 {
+	if atomic.LoadInt32(&pool.autoTune) == 1 {
+		return pool.basicPool.AddMaxWorkerCnt(value)
+	}
+	return pool.GetMaxWorkerCnt()
+}
+
+func (pool *RoutinePool) addWorker() {
+	if atomic.LoadInt32(&pool.autoTune) == 1 {
+		pool.lock.Lock()
+		defer pool.lock.Unlock()
+	}
+	w := &worker{}
+	w.name = fmt.Sprintf("woker-%d", len(pool.workers))
+	w.taskQueue = pool.taskQueue
+	w.wg = pool.wg
+	pool.AddWorkerCnt(1)
+	w.pool = pool
+	pool.workers[w.name] = w
+	pool.wg.Add(1)
+	w.start()
+}
+
+func (pool *RoutinePool) autoTuneWorker(w *worker) bool {
+	if atomic.LoadInt32(&pool.autoTune) == 0 {
+		return false
+	}
+
+	if w == nil {
+		return false
+	}
+
+	workerCnt := pool.GetWorkerCnt()
+	maxWorkerCnt := pool.GetMaxWorkerCnt()
+	if workerCnt > maxWorkerCnt && atomic.CompareAndSwapInt64(&pool.workerCnt, workerCnt, workerCnt-1) {
+		pool.lock.Lock()
+		defer pool.lock.Unlock()
+		delete(pool.workers, w.name)
+		w.wg.Done()
+		w.release()
+		return true
+	}
+
+	return false
+}
+
+// ExecuteFunc creates a funcWrapper instance with the specified function and calls the Execute function
+func (pool *RoutinePool) ExecuteFunc(f func() interface{}) {
+	fw := &funcWrapper{
+		f: f,
+	}
+	pool.Execute(fw)
+}
+
+// Execute pushes the specified task to the dispatchQueue
+func (pool *RoutinePool) Execute(t Task) {
+	if t != nil {
+		pool.dispatchQueue <- t
+	}
+}
+
+// SubmitFunc creates a funcWrapper instance with the specified function and calls the Submit function
+func (pool *RoutinePool) SubmitFunc(f func() interface{}) (Future, error) {
+	fw := &funcWrapper{
+		f: f,
+	}
+	return pool.Submit(fw)
+}
+
+// Submit pushes the specified task to the dispatchQueue, and returns the FutureResult and error info
+func (pool *RoutinePool) Submit(t Task) (Future, error) {
+	if err := pool.checkStatus(t); err != nil {
+		return nil, err
+	}
+	f := &FutureResult{}
+	f.resultChan = make(chan interface{}, 1)
+	tw := &taskWrapper{
+		t: t,
+		f: f,
+	}
+	pool.dispatchQueue <- tw
+	return f, nil
+}
+
+// SubmitWithTimeout pushes the specified task to the dispatchQueue, and returns the FutureResult and error info.
+// Also takes a timeout value, will return ErrSubmitTimeout if it does't complete within that time.
+func (pool *RoutinePool) SubmitWithTimeout(t Task, timeout int64) (Future, error) {
+	if timeout <= 0 {
+		return pool.Submit(t)
+	}
+	if err := pool.checkStatus(t); err != nil {
+		return nil, err
+	}
+	timeoutChan := make(chan bool, 1)
+	go func() {
+		time.Sleep(time.Duration(time.Millisecond * time.Duration(timeout)))
+		timeoutChan <- true
+		close(timeoutChan)
+	}()
+
+	f := &FutureResult{}
+	f.resultChan = make(chan interface{}, 1)
+	tw := &taskWrapper{
+		t: t,
+		f: f,
+	}
+	select {
+	case pool.dispatchQueue <- tw:
+		return f, nil
+	case _, ok := <-timeoutChan:
+		if ok {
+			return nil, ErrSubmitTimeout
+		}
+		return nil, ErrSubmitTimeout
+	}
+}
+
+func (pool *RoutinePool) beforeCloseDispatchQueue() {
+	if !atomic.CompareAndSwapInt32(&pool.isShutDown, 0, 1) {
+		return
+	}
+	pool.dispatchQueue <- closeQueue
+	pool.wg.Wait()
+}
+
+func (pool *RoutinePool) doCloseDispatchQueue() {
+	close(pool.dispatchQueue)
+	pool.shutDownWg.Wait()
+}
+
+// ShutDown closes the RoutinePool instance
+func (pool *RoutinePool) ShutDown() {
+	pool.beforeCloseDispatchQueue()
+	pool.doCloseDispatchQueue()
+	for _, w := range pool.workers {
+		w.release()
+	}
+	pool.workers = nil
+	pool.taskQueue = nil
+	pool.dispatchQueue = nil
+}
+
+// NoChanPool defines the coroutine pool struct
+type NoChanPool struct {
+	basicPool
+	wg     *sync.WaitGroup
+	tokens chan interface{}
+}
+
+// NewNochanPool creates a new NoChanPool instance
+func NewNochanPool(maxWorkerCnt int) Pool {
+	if maxWorkerCnt <= 0 {
+		maxWorkerCnt = runtime.NumCPU()
+	}
+
+	pool := &NoChanPool{
+		wg:     new(sync.WaitGroup),
+		tokens: make(chan interface{}, maxWorkerCnt),
+	}
+	pool.isShutDown = 0
+	pool.AddMaxWorkerCnt(int64(maxWorkerCnt))
+
+	for i := 0; i < maxWorkerCnt; i++ {
+		pool.tokens <- struct{}{}
+	}
+
+	return pool
+}
+
+func (pool *NoChanPool) acquire() {
+	<-pool.tokens
+}
+
+func (pool *NoChanPool) release() {
+	pool.tokens <- 1
+}
+
+func (pool *NoChanPool) execute(t Task) {
+	pool.wg.Add(1)
+	go func() {
+		pool.acquire()
+		defer func() {
+			pool.release()
+			pool.wg.Done()
+		}()
+		runTask(t)
+	}()
+}
+
+// ShutDown closes the NoChanPool instance
+func (pool *NoChanPool) ShutDown() {
+	if !atomic.CompareAndSwapInt32(&pool.isShutDown, 0, 1) {
+		return
+	}
+	pool.wg.Wait()
+}
+
+// Execute executes the specified task
+func (pool *NoChanPool) Execute(t Task) {
+	if t != nil {
+		pool.execute(t)
+	}
+}
+
+// ExecuteFunc creates a funcWrapper instance with the specified function and calls the Execute function
+func (pool *NoChanPool) ExecuteFunc(f func() interface{}) {
+	fw := &funcWrapper{
+		f: f,
+	}
+	pool.Execute(fw)
+}
+
+// Submit executes the specified task, and returns the FutureResult and error info
+func (pool *NoChanPool) Submit(t Task) (Future, error) {
+	if t == nil {
+		return nil, ErrTaskInvalid
+	}
+
+	f := &FutureResult{}
+	f.resultChan = make(chan interface{}, 1)
+	tw := &taskWrapper{
+		t: t,
+		f: f,
+	}
+
+	pool.execute(tw)
+	return f, nil
+}
+
+// SubmitFunc creates a funcWrapper instance with the specified function and calls the Submit function
+func (pool *NoChanPool) SubmitFunc(f func() interface{}) (Future, error) {
+	fw := &funcWrapper{
+		f: f,
+	}
+	return pool.Submit(fw)
+}

modules/obs/temporary.go

@@ -0,0 +1,790 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:golint, unused
+package obs
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+)
+
+// CreateSignedUrl creates signed url with the specified CreateSignedUrlInput, and returns the CreateSignedUrlOutput and error
+func (obsClient ObsClient) CreateSignedUrl(input *CreateSignedUrlInput) (output *CreateSignedUrlOutput, err error) {
+	if input == nil {
+		return nil, errors.New("CreateSignedUrlInput is nil")
+	}
+
+	params := make(map[string]string, len(input.QueryParams))
+	for key, value := range input.QueryParams {
+		params[key] = value
+	}
+
+	if input.SubResource != "" {
+		params[string(input.SubResource)] = ""
+	}
+
+	headers := make(map[string][]string, len(input.Headers))
+	for key, value := range input.Headers {
+		headers[key] = []string{value}
+	}
+
+	if input.Expires <= 0 {
+		input.Expires = 300
+	}
+
+	requestURL, err := obsClient.doAuthTemporary(string(input.Method), input.Bucket, input.Key, params, headers, int64(input.Expires))
+	if err != nil {
+		return nil, err
+	}
+
+	output = &CreateSignedUrlOutput{
+		SignedUrl:                  requestURL,
+		ActualSignedRequestHeaders: headers,
+	}
+	return
+}
+
+func (obsClient ObsClient) isSecurityToken(params map[string]string) {
+	if obsClient.conf.securityProvider.securityToken != "" {
+		if obsClient.conf.signature == SignatureObs {
+			params[HEADER_STS_TOKEN_OBS] = obsClient.conf.securityProvider.securityToken
+		} else {
+			params[HEADER_STS_TOKEN_AMZ] = obsClient.conf.securityProvider.securityToken
+		}
+	}
+}
+
+// CreateBrowserBasedSignature gets the browser based signature with the specified CreateBrowserBasedSignatureInput,
+// and returns the CreateBrowserBasedSignatureOutput and error
+func (obsClient ObsClient) CreateBrowserBasedSignature(input *CreateBrowserBasedSignatureInput) (output *CreateBrowserBasedSignatureOutput, err error) {
+	if input == nil {
+		return nil, errors.New("CreateBrowserBasedSignatureInput is nil")
+	}
+
+	params := make(map[string]string, len(input.FormParams))
+	for key, value := range input.FormParams {
+		params[key] = value
+	}
+
+	date := time.Now().UTC()
+	shortDate := date.Format(SHORT_DATE_FORMAT)
+	longDate := date.Format(LONG_DATE_FORMAT)
+
+	credential, _ := getCredential(obsClient.conf.securityProvider.ak, obsClient.conf.region, shortDate)
+
+	if input.Expires <= 0 {
+		input.Expires = 300
+	}
+
+	expiration := date.Add(time.Second * time.Duration(input.Expires)).Format(ISO8601_DATE_FORMAT)
+	if obsClient.conf.signature == SignatureV4 {
+		params[PARAM_ALGORITHM_AMZ_CAMEL] = V4_HASH_PREFIX
+		params[PARAM_CREDENTIAL_AMZ_CAMEL] = credential
+		params[PARAM_DATE_AMZ_CAMEL] = longDate
+	}
+
+	obsClient.isSecurityToken(params)
+
+	matchAnyBucket := true
+	matchAnyKey := true
+	count := 5
+	if bucket := strings.TrimSpace(input.Bucket); bucket != "" {
+		params["bucket"] = bucket
+		matchAnyBucket = false
+		count--
+	}
+
+	if key := strings.TrimSpace(input.Key); key != "" {
+		params["key"] = key
+		matchAnyKey = false
+		count--
+	}
+
+	originPolicySlice := make([]string, 0, len(params)+count)
+	originPolicySlice = append(originPolicySlice, fmt.Sprintf("{\"expiration\":\"%s\",", expiration))
+	originPolicySlice = append(originPolicySlice, "\"conditions\":[")
+	for key, value := range params {
+		if _key := strings.TrimSpace(strings.ToLower(key)); _key != "" {
+			originPolicySlice = append(originPolicySlice, fmt.Sprintf("{\"%s\":\"%s\"},", _key, value))
+		}
+	}
+
+	if matchAnyBucket {
+		originPolicySlice = append(originPolicySlice, "[\"starts-with\", \"$bucket\", \"\"],")
+	}
+
+	if matchAnyKey {
+		originPolicySlice = append(originPolicySlice, "[\"starts-with\", \"$key\", \"\"],")
+	}
+
+	originPolicySlice = append(originPolicySlice, "]}")
+
+	originPolicy := strings.Join(originPolicySlice, "")
+	policy := Base64Encode([]byte(originPolicy))
+	var signature string
+	if obsClient.conf.signature == SignatureV4 {
+		signature = getSignature(policy, obsClient.conf.securityProvider.sk, obsClient.conf.region, shortDate)
+	} else {
+		signature = Base64Encode(HmacSha1([]byte(obsClient.conf.securityProvider.sk), []byte(policy)))
+	}
+
+	output = &CreateBrowserBasedSignatureOutput{
+		OriginPolicy: originPolicy,
+		Policy:       policy,
+		Algorithm:    params[PARAM_ALGORITHM_AMZ_CAMEL],
+		Credential:   params[PARAM_CREDENTIAL_AMZ_CAMEL],
+		Date:         params[PARAM_DATE_AMZ_CAMEL],
+		Signature:    signature,
+	}
+	return
+}
+
+// ListBucketsWithSignedUrl lists buckets with the specified signed url and signed request headers
+func (obsClient ObsClient) ListBucketsWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *ListBucketsOutput, err error) {
+	output = &ListBucketsOutput{}
+	err = obsClient.doHTTPWithSignedURL("ListBuckets", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// CreateBucketWithSignedUrl creates bucket with the specified signed url and signed request headers and data
+func (obsClient ObsClient) CreateBucketWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("CreateBucket", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// DeleteBucketWithSignedUrl deletes bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) DeleteBucketWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("DeleteBucket", HTTP_DELETE, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketStoragePolicyWithSignedUrl sets bucket storage class with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketStoragePolicyWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketStoragePolicy", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketStoragePolicyWithSignedUrl gets bucket storage class with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketStoragePolicyWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketStoragePolicyOutput, err error) {
+	output = &GetBucketStoragePolicyOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketStoragePolicy", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// ListObjectsWithSignedUrl lists objects in a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) ListObjectsWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *ListObjectsOutput, err error) {
+	output = &ListObjectsOutput{}
+	err = obsClient.doHTTPWithSignedURL("ListObjects", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		if location, ok := output.ResponseHeaders[HEADER_BUCKET_REGION]; ok {
+			output.Location = location[0]
+		}
+	}
+	return
+}
+
+// ListVersionsWithSignedUrl lists versioning objects in a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) ListVersionsWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *ListVersionsOutput, err error) {
+	output = &ListVersionsOutput{}
+	err = obsClient.doHTTPWithSignedURL("ListVersions", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		if location, ok := output.ResponseHeaders[HEADER_BUCKET_REGION]; ok {
+			output.Location = location[0]
+		}
+	}
+	return
+}
+
+// ListMultipartUploadsWithSignedUrl lists the multipart uploads that are initialized but not combined or aborted in a
+// specified bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) ListMultipartUploadsWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *ListMultipartUploadsOutput, err error) {
+	output = &ListMultipartUploadsOutput{}
+	err = obsClient.doHTTPWithSignedURL("ListMultipartUploads", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketQuotaWithSignedUrl sets the bucket quota with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketQuotaWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketQuota", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketQuotaWithSignedUrl gets the bucket quota with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketQuotaWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketQuotaOutput, err error) {
+	output = &GetBucketQuotaOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketQuota", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// HeadBucketWithSignedUrl checks whether a bucket exists with the specified signed url and signed request headers
+func (obsClient ObsClient) HeadBucketWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("HeadBucket", HTTP_HEAD, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// HeadObjectWithSignedUrl checks whether an object exists with the specified signed url and signed request headers
+func (obsClient ObsClient) HeadObjectWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("HeadObject", HTTP_HEAD, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketMetadataWithSignedUrl gets the metadata of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketMetadataWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketMetadataOutput, err error) {
+	output = &GetBucketMetadataOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketMetadata", HTTP_HEAD, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParseGetBucketMetadataOutput(output)
+	}
+	return
+}
+
+// GetBucketStorageInfoWithSignedUrl gets storage information about a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketStorageInfoWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketStorageInfoOutput, err error) {
+	output = &GetBucketStorageInfoOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketStorageInfo", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketLocationWithSignedUrl gets the location of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketLocationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketLocationOutput, err error) {
+	output = &GetBucketLocationOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketLocation", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketAclWithSignedUrl sets the bucket ACL with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketAclWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketAcl", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketAclWithSignedUrl gets the bucket ACL with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketAclWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketAclOutput, err error) {
+	output = &GetBucketAclOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketAcl", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketPolicyWithSignedUrl sets the bucket policy with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketPolicyWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketPolicy", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketPolicyWithSignedUrl gets the bucket policy with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketPolicyWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketPolicyOutput, err error) {
+	output = &GetBucketPolicyOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketPolicy", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, false)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// DeleteBucketPolicyWithSignedUrl deletes the bucket policy with the specified signed url and signed request headers
+func (obsClient ObsClient) DeleteBucketPolicyWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("DeleteBucketPolicy", HTTP_DELETE, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketCorsWithSignedUrl sets CORS rules for a bucket with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketCorsWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketCors", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketCorsWithSignedUrl gets CORS rules of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketCorsWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketCorsOutput, err error) {
+	output = &GetBucketCorsOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketCors", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// DeleteBucketCorsWithSignedUrl deletes CORS rules of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) DeleteBucketCorsWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("DeleteBucketCors", HTTP_DELETE, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketVersioningWithSignedUrl sets the versioning status for a bucket with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketVersioningWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketVersioning", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketVersioningWithSignedUrl gets the versioning status of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketVersioningWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketVersioningOutput, err error) {
+	output = &GetBucketVersioningOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketVersioning", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketWebsiteConfigurationWithSignedUrl sets website hosting for a bucket with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketWebsiteConfigurationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketWebsiteConfiguration", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketWebsiteConfigurationWithSignedUrl gets the website hosting settings of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketWebsiteConfigurationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketWebsiteConfigurationOutput, err error) {
+	output = &GetBucketWebsiteConfigurationOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketWebsiteConfiguration", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// DeleteBucketWebsiteConfigurationWithSignedUrl deletes the website hosting settings of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) DeleteBucketWebsiteConfigurationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("DeleteBucketWebsiteConfiguration", HTTP_DELETE, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketLoggingConfigurationWithSignedUrl sets the bucket logging with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketLoggingConfigurationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketLoggingConfiguration", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketLoggingConfigurationWithSignedUrl gets the logging settings of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketLoggingConfigurationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketLoggingConfigurationOutput, err error) {
+	output = &GetBucketLoggingConfigurationOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketLoggingConfiguration", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketLifecycleConfigurationWithSignedUrl sets lifecycle rules for a bucket with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketLifecycleConfigurationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketLifecycleConfiguration", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketLifecycleConfigurationWithSignedUrl gets lifecycle rules of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketLifecycleConfigurationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketLifecycleConfigurationOutput, err error) {
+	output = &GetBucketLifecycleConfigurationOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketLifecycleConfiguration", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// DeleteBucketLifecycleConfigurationWithSignedUrl deletes lifecycle rules of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) DeleteBucketLifecycleConfigurationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("DeleteBucketLifecycleConfiguration", HTTP_DELETE, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketTaggingWithSignedUrl sets bucket tags with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketTaggingWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketTagging", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketTaggingWithSignedUrl gets bucket tags with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketTaggingWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketTaggingOutput, err error) {
+	output = &GetBucketTaggingOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketTagging", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// DeleteBucketTaggingWithSignedUrl deletes bucket tags with the specified signed url and signed request headers
+func (obsClient ObsClient) DeleteBucketTaggingWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("DeleteBucketTagging", HTTP_DELETE, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetBucketNotificationWithSignedUrl sets event notification for a bucket with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketNotificationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketNotification", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketNotificationWithSignedUrl gets event notification settings of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketNotificationWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketNotificationOutput, err error) {
+	output = &GetBucketNotificationOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketNotification", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// DeleteObjectWithSignedUrl deletes an object with the specified signed url and signed request headers
+func (obsClient ObsClient) DeleteObjectWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *DeleteObjectOutput, err error) {
+	output = &DeleteObjectOutput{}
+	err = obsClient.doHTTPWithSignedURL("DeleteObject", HTTP_DELETE, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParseDeleteObjectOutput(output)
+	}
+	return
+}
+
+// DeleteObjectsWithSignedUrl deletes objects in a batch with the specified signed url and signed request headers and data
+func (obsClient ObsClient) DeleteObjectsWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *DeleteObjectsOutput, err error) {
+	output = &DeleteObjectsOutput{}
+	err = obsClient.doHTTPWithSignedURL("DeleteObjects", HTTP_POST, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// SetObjectAclWithSignedUrl sets ACL for an object with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetObjectAclWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetObjectAcl", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetObjectAclWithSignedUrl gets the ACL of an object with the specified signed url and signed request headers
+func (obsClient ObsClient) GetObjectAclWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetObjectAclOutput, err error) {
+	output = &GetObjectAclOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetObjectAcl", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		if versionID, ok := output.ResponseHeaders[HEADER_VERSION_ID]; ok {
+			output.VersionId = versionID[0]
+		}
+	}
+	return
+}
+
+// RestoreObjectWithSignedUrl restores an object with the specified signed url and signed request headers and data
+func (obsClient ObsClient) RestoreObjectWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("RestoreObject", HTTP_POST, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetObjectMetadataWithSignedUrl gets object metadata with the specified signed url and signed request headers
+func (obsClient ObsClient) GetObjectMetadataWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetObjectMetadataOutput, err error) {
+	output = &GetObjectMetadataOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetObjectMetadata", HTTP_HEAD, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParseGetObjectMetadataOutput(output)
+	}
+	return
+}
+
+// GetObjectWithSignedUrl downloads object with the specified signed url and signed request headers
+func (obsClient ObsClient) GetObjectWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetObjectOutput, err error) {
+	output = &GetObjectOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetObject", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParseGetObjectOutput(output)
+	}
+	return
+}
+
+// PutObjectWithSignedUrl uploads an object to the specified bucket with the specified signed url and signed request headers and data
+func (obsClient ObsClient) PutObjectWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *PutObjectOutput, err error) {
+	output = &PutObjectOutput{}
+	err = obsClient.doHTTPWithSignedURL("PutObject", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParsePutObjectOutput(output)
+	}
+	return
+}
+
+// PutFileWithSignedUrl uploads a file to the specified bucket with the specified signed url and signed request headers and sourceFile path
+func (obsClient ObsClient) PutFileWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, sourceFile string) (output *PutObjectOutput, err error) {
+	var data io.Reader
+	sourceFile = strings.TrimSpace(sourceFile)
+	if sourceFile != "" {
+		fd, _err := os.Open(sourceFile)
+		if _err != nil {
+			err = _err
+			return nil, err
+		}
+		defer func() {
+			errMsg := fd.Close()
+			if errMsg != nil {
+				doLog(LEVEL_WARN, "Failed to close file with reason: %v", errMsg)
+			}
+		}()
+
+		stat, _err := fd.Stat()
+		if _err != nil {
+			err = _err
+			return nil, err
+		}
+		fileReaderWrapper := &fileReaderWrapper{filePath: sourceFile}
+		fileReaderWrapper.reader = fd
+
+		var contentLength int64
+		if value, ok := actualSignedRequestHeaders[HEADER_CONTENT_LENGTH_CAMEL]; ok {
+			contentLength = StringToInt64(value[0], -1)
+		} else if value, ok := actualSignedRequestHeaders[HEADER_CONTENT_LENGTH]; ok {
+			contentLength = StringToInt64(value[0], -1)
+		} else {
+			contentLength = stat.Size()
+		}
+		if contentLength > stat.Size() {
+			return nil, errors.New("ContentLength is larger than fileSize")
+		}
+		fileReaderWrapper.totalCount = contentLength
+		data = fileReaderWrapper
+	}
+
+	output = &PutObjectOutput{}
+	err = obsClient.doHTTPWithSignedURL("PutObject", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParsePutObjectOutput(output)
+	}
+	return
+}
+
+// CopyObjectWithSignedUrl creates a copy for an existing object with the specified signed url and signed request headers
+func (obsClient ObsClient) CopyObjectWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *CopyObjectOutput, err error) {
+	output = &CopyObjectOutput{}
+	err = obsClient.doHTTPWithSignedURL("CopyObject", HTTP_PUT, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParseCopyObjectOutput(output)
+	}
+	return
+}
+
+// AbortMultipartUploadWithSignedUrl aborts a multipart upload in a specified bucket by using the multipart upload ID with the specified signed url and signed request headers
+func (obsClient ObsClient) AbortMultipartUploadWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("AbortMultipartUpload", HTTP_DELETE, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// InitiateMultipartUploadWithSignedUrl initializes a multipart upload with the specified signed url and signed request headers
+func (obsClient ObsClient) InitiateMultipartUploadWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *InitiateMultipartUploadOutput, err error) {
+	output = &InitiateMultipartUploadOutput{}
+	err = obsClient.doHTTPWithSignedURL("InitiateMultipartUpload", HTTP_POST, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParseInitiateMultipartUploadOutput(output)
+	}
+	return
+}
+
+// UploadPartWithSignedUrl uploads a part to a specified bucket by using a specified multipart upload ID
+// with the specified signed url and signed request headers and data
+func (obsClient ObsClient) UploadPartWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *UploadPartOutput, err error) {
+	output = &UploadPartOutput{}
+	err = obsClient.doHTTPWithSignedURL("UploadPart", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParseUploadPartOutput(output)
+	}
+	return
+}
+
+// CompleteMultipartUploadWithSignedUrl combines the uploaded parts in a specified bucket by using the multipart upload ID
+// with the specified signed url and signed request headers and data
+func (obsClient ObsClient) CompleteMultipartUploadWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *CompleteMultipartUploadOutput, err error) {
+	output = &CompleteMultipartUploadOutput{}
+	err = obsClient.doHTTPWithSignedURL("CompleteMultipartUpload", HTTP_POST, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParseCompleteMultipartUploadOutput(output)
+	}
+	return
+}
+
+// ListPartsWithSignedUrl lists the uploaded parts in a bucket by using the multipart upload ID with the specified signed url and signed request headers
+func (obsClient ObsClient) ListPartsWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *ListPartsOutput, err error) {
+	output = &ListPartsOutput{}
+	err = obsClient.doHTTPWithSignedURL("ListParts", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// CopyPartWithSignedUrl copy a part to a specified bucket by using a specified multipart upload ID with the specified signed url and signed request headers
+func (obsClient ObsClient) CopyPartWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *CopyPartOutput, err error) {
+	output = &CopyPartOutput{}
+	err = obsClient.doHTTPWithSignedURL("CopyPart", HTTP_PUT, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	} else {
+		ParseCopyPartOutput(output)
+	}
+	return
+}
+
+// SetBucketRequestPaymentWithSignedUrl sets requester-pays setting for a bucket with the specified signed url and signed request headers and data
+func (obsClient ObsClient) SetBucketRequestPaymentWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header, data io.Reader) (output *BaseModel, err error) {
+	output = &BaseModel{}
+	err = obsClient.doHTTPWithSignedURL("SetBucketRequestPayment", HTTP_PUT, signedUrl, actualSignedRequestHeaders, data, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}
+
+// GetBucketRequestPaymentWithSignedUrl gets requester-pays setting of a bucket with the specified signed url and signed request headers
+func (obsClient ObsClient) GetBucketRequestPaymentWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetBucketRequestPaymentOutput, err error) {
+	output = &GetBucketRequestPaymentOutput{}
+	err = obsClient.doHTTPWithSignedURL("GetBucketRequestPayment", HTTP_GET, signedUrl, actualSignedRequestHeaders, nil, output, true)
+	if err != nil {
+		output = nil
+	}
+	return
+}

modules/obs/trait.go

@@ -0,0 +1,909 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:structcheck, unused
+//nolint:golint, unused
+package obs
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// IReadCloser defines interface with function: setReadCloser
+type IReadCloser interface {
+	setReadCloser(body io.ReadCloser)
+}
+
+func (output *GetObjectOutput) setReadCloser(body io.ReadCloser) {
+	output.Body = body
+}
+
+func setHeaders(headers map[string][]string, header string, headerValue []string, isObs bool) {
+	if isObs {
+		header = HEADER_PREFIX_OBS + header
+		headers[header] = headerValue
+	} else {
+		header = HEADER_PREFIX + header
+		headers[header] = headerValue
+	}
+}
+
+func setHeadersNext(headers map[string][]string, header string, headerNext string, headerValue []string, isObs bool) {
+	if isObs {
+		headers[header] = headerValue
+	} else {
+		headers[headerNext] = headerValue
+	}
+}
+
+// IBaseModel defines interface for base response model
+type IBaseModel interface {
+	setStatusCode(statusCode int)
+
+	setRequestID(requestID string)
+
+	setResponseHeaders(responseHeaders map[string][]string)
+}
+
+// ISerializable defines interface with function: trans
+type ISerializable interface {
+	trans(isObs bool) (map[string]string, map[string][]string, interface{}, error)
+}
+
+// DefaultSerializable defines default serializable struct
+type DefaultSerializable struct {
+	params  map[string]string
+	headers map[string][]string
+	data    interface{}
+}
+
+func (input DefaultSerializable) trans(isObs bool) (map[string]string, map[string][]string, interface{}, error) {
+	return input.params, input.headers, input.data, nil
+}
+
+var defaultSerializable = &DefaultSerializable{}
+
+func newSubResourceSerial(subResource SubResourceType) *DefaultSerializable {
+	return &DefaultSerializable{map[string]string{string(subResource): ""}, nil, nil}
+}
+
+func trans(subResource SubResourceType, input interface{}) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(subResource): ""}
+	data, err = ConvertRequestToIoReader(input)
+	return
+}
+
+func (baseModel *BaseModel) setStatusCode(statusCode int) {
+	baseModel.StatusCode = statusCode
+}
+
+func (baseModel *BaseModel) setRequestID(requestID string) {
+	baseModel.RequestId = requestID
+}
+
+func (baseModel *BaseModel) setResponseHeaders(responseHeaders map[string][]string) {
+	baseModel.ResponseHeaders = responseHeaders
+}
+
+func (input ListBucketsInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	headers = make(map[string][]string)
+	if input.QueryLocation && !isObs {
+		setHeaders(headers, HEADER_LOCATION_AMZ, []string{"true"}, isObs)
+	}
+	return
+}
+
+func (input CreateBucketInput) prepareGrantHeaders(headers map[string][]string, isObs bool) {
+	if grantReadID := input.GrantReadId; grantReadID != "" {
+		setHeaders(headers, HEADER_GRANT_READ_OBS, []string{grantReadID}, isObs)
+	}
+	if grantWriteID := input.GrantWriteId; grantWriteID != "" {
+		setHeaders(headers, HEADER_GRANT_WRITE_OBS, []string{grantWriteID}, isObs)
+	}
+	if grantReadAcpID := input.GrantReadAcpId; grantReadAcpID != "" {
+		setHeaders(headers, HEADER_GRANT_READ_ACP_OBS, []string{grantReadAcpID}, isObs)
+	}
+	if grantWriteAcpID := input.GrantWriteAcpId; grantWriteAcpID != "" {
+		setHeaders(headers, HEADER_GRANT_WRITE_ACP_OBS, []string{grantWriteAcpID}, isObs)
+	}
+	if grantFullControlID := input.GrantFullControlId; grantFullControlID != "" {
+		setHeaders(headers, HEADER_GRANT_FULL_CONTROL_OBS, []string{grantFullControlID}, isObs)
+	}
+	if grantReadDeliveredID := input.GrantReadDeliveredId; grantReadDeliveredID != "" {
+		setHeaders(headers, HEADER_GRANT_READ_DELIVERED_OBS, []string{grantReadDeliveredID}, true)
+	}
+	if grantFullControlDeliveredID := input.GrantFullControlDeliveredId; grantFullControlDeliveredID != "" {
+		setHeaders(headers, HEADER_GRANT_FULL_CONTROL_DELIVERED_OBS, []string{grantFullControlDeliveredID}, true)
+	}
+}
+
+func (input CreateBucketInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	headers = make(map[string][]string)
+	if acl := string(input.ACL); acl != "" {
+		setHeaders(headers, HEADER_ACL, []string{acl}, isObs)
+	}
+	if storageClass := string(input.StorageClass); storageClass != "" {
+		if !isObs {
+			if storageClass == string(StorageClassWarm) {
+				storageClass = string(storageClassStandardIA)
+			} else if storageClass == string(StorageClassCold) {
+				storageClass = string(storageClassGlacier)
+			}
+		}
+		setHeadersNext(headers, HEADER_STORAGE_CLASS_OBS, HEADER_STORAGE_CLASS, []string{storageClass}, isObs)
+	}
+	if epid := input.Epid; epid != "" {
+		setHeaders(headers, HEADER_EPID_HEADERS, []string{epid}, isObs)
+	}
+	if availableZone := input.AvailableZone; availableZone != "" {
+		setHeaders(headers, HEADER_AZ_REDUNDANCY, []string{availableZone}, isObs)
+	}
+
+	input.prepareGrantHeaders(headers, isObs)
+	if location := strings.TrimSpace(input.Location); location != "" {
+		input.Location = location
+
+		xml := make([]string, 0, 3)
+		xml = append(xml, "<CreateBucketConfiguration>")
+		if isObs {
+			xml = append(xml, fmt.Sprintf("<Location>%s</Location>", input.Location))
+		} else {
+			xml = append(xml, fmt.Sprintf("<LocationConstraint>%s</LocationConstraint>", input.Location))
+		}
+		xml = append(xml, "</CreateBucketConfiguration>")
+
+		data = strings.Join(xml, "")
+	}
+	return
+}
+
+func (input SetBucketStoragePolicyInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	xml := make([]string, 0, 1)
+	if !isObs {
+		storageClass := "STANDARD"
+		if input.StorageClass == StorageClassWarm {
+			storageClass = string(storageClassStandardIA)
+		} else if input.StorageClass == StorageClassCold {
+			storageClass = string(storageClassGlacier)
+		}
+		params = map[string]string{string(SubResourceStoragePolicy): ""}
+		xml = append(xml, fmt.Sprintf("<StoragePolicy><DefaultStorageClass>%s</DefaultStorageClass></StoragePolicy>", storageClass))
+	} else {
+		if input.StorageClass != StorageClassWarm && input.StorageClass != StorageClassCold {
+			input.StorageClass = StorageClassStandard
+		}
+		params = map[string]string{string(SubResourceStorageClass): ""}
+		xml = append(xml, fmt.Sprintf("<StorageClass>%s</StorageClass>", input.StorageClass))
+	}
+	data = strings.Join(xml, "")
+	return
+}
+
+func (input ListObjsInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = make(map[string]string)
+	if input.Prefix != "" {
+		params["prefix"] = input.Prefix
+	}
+	if input.Delimiter != "" {
+		params["delimiter"] = input.Delimiter
+	}
+	if input.MaxKeys > 0 {
+		params["max-keys"] = IntToString(input.MaxKeys)
+	}
+	headers = make(map[string][]string)
+	if origin := strings.TrimSpace(input.Origin); origin != "" {
+		headers[HEADER_ORIGIN_CAMEL] = []string{origin}
+	}
+	if requestHeader := strings.TrimSpace(input.RequestHeader); requestHeader != "" {
+		headers[HEADER_ACCESS_CONTROL_REQUEST_HEADER_CAMEL] = []string{requestHeader}
+	}
+	return
+}
+
+func (input ListObjectsInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params, headers, data, err = input.ListObjsInput.trans(isObs)
+	if err != nil {
+		return
+	}
+	if input.Marker != "" {
+		params["marker"] = input.Marker
+	}
+	return
+}
+
+func (input ListVersionsInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params, headers, data, err = input.ListObjsInput.trans(isObs)
+	if err != nil {
+		return
+	}
+	params[string(SubResourceVersions)] = ""
+	if input.KeyMarker != "" {
+		params["key-marker"] = input.KeyMarker
+	}
+	if input.VersionIdMarker != "" {
+		params["version-id-marker"] = input.VersionIdMarker
+	}
+	return
+}
+
+func (input ListMultipartUploadsInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceUploads): ""}
+	if input.Prefix != "" {
+		params["prefix"] = input.Prefix
+	}
+	if input.Delimiter != "" {
+		params["delimiter"] = input.Delimiter
+	}
+	if input.MaxUploads > 0 {
+		params["max-uploads"] = IntToString(input.MaxUploads)
+	}
+	if input.KeyMarker != "" {
+		params["key-marker"] = input.KeyMarker
+	}
+	if input.UploadIdMarker != "" {
+		params["upload-id-marker"] = input.UploadIdMarker
+	}
+	return
+}
+
+func (input SetBucketQuotaInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	return trans(SubResourceQuota, input)
+}
+
+func (input SetBucketAclInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceAcl): ""}
+	headers = make(map[string][]string)
+
+	if acl := string(input.ACL); acl != "" {
+		setHeaders(headers, HEADER_ACL, []string{acl}, isObs)
+	} else {
+		data, _ = convertBucketACLToXML(input.AccessControlPolicy, false, isObs)
+	}
+	return
+}
+
+func (input SetBucketPolicyInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourcePolicy): ""}
+	data = strings.NewReader(input.Policy)
+	return
+}
+
+func (input SetBucketCorsInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceCors): ""}
+	data, md5, err := ConvertRequestToIoReaderV2(input)
+	if err != nil {
+		return
+	}
+	headers = map[string][]string{HEADER_MD5_CAMEL: {md5}}
+	return
+}
+
+func (input SetBucketVersioningInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	return trans(SubResourceVersioning, input)
+}
+
+func (input SetBucketWebsiteConfigurationInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceWebsite): ""}
+	data, _ = ConvertWebsiteConfigurationToXml(input.BucketWebsiteConfiguration, false)
+	return
+}
+
+func (input GetBucketMetadataInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	headers = make(map[string][]string)
+	if origin := strings.TrimSpace(input.Origin); origin != "" {
+		headers[HEADER_ORIGIN_CAMEL] = []string{origin}
+	}
+	if requestHeader := strings.TrimSpace(input.RequestHeader); requestHeader != "" {
+		headers[HEADER_ACCESS_CONTROL_REQUEST_HEADER_CAMEL] = []string{requestHeader}
+	}
+	return
+}
+
+func (input SetBucketLoggingConfigurationInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceLogging): ""}
+	data, _ = ConvertLoggingStatusToXml(input.BucketLoggingStatus, false, isObs)
+	return
+}
+
+func (input SetBucketLifecycleConfigurationInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceLifecycle): ""}
+	data, md5 := ConvertLifecyleConfigurationToXml(input.BucketLifecyleConfiguration, true, isObs)
+	headers = map[string][]string{HEADER_MD5_CAMEL: {md5}}
+	return
+}
+
+func (input SetBucketTaggingInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceTagging): ""}
+	data, md5, err := ConvertRequestToIoReaderV2(input)
+	if err != nil {
+		return
+	}
+	headers = map[string][]string{HEADER_MD5_CAMEL: {md5}}
+	return
+}
+
+func (input SetBucketNotificationInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceNotification): ""}
+	data, _ = ConvertNotificationToXml(input.BucketNotification, false, isObs)
+	return
+}
+
+func (input DeleteObjectInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = make(map[string]string)
+	if input.VersionId != "" {
+		params[PARAM_VERSION_ID] = input.VersionId
+	}
+	return
+}
+
+func (input DeleteObjectsInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceDelete): ""}
+	data, md5, err := ConvertRequestToIoReaderV2(input)
+	if err != nil {
+		return
+	}
+	headers = map[string][]string{HEADER_MD5_CAMEL: {md5}}
+	return
+}
+
+func (input SetObjectAclInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceAcl): ""}
+	if input.VersionId != "" {
+		params[PARAM_VERSION_ID] = input.VersionId
+	}
+	headers = make(map[string][]string)
+	if acl := string(input.ACL); acl != "" {
+		setHeaders(headers, HEADER_ACL, []string{acl}, isObs)
+	} else {
+		data, _ = ConvertAclToXml(input.AccessControlPolicy, false, isObs)
+	}
+	return
+}
+
+func (input GetObjectAclInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceAcl): ""}
+	if input.VersionId != "" {
+		params[PARAM_VERSION_ID] = input.VersionId
+	}
+	return
+}
+
+func (input RestoreObjectInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{string(SubResourceRestore): ""}
+	if input.VersionId != "" {
+		params[PARAM_VERSION_ID] = input.VersionId
+	}
+	if !isObs {
+		data, err = ConvertRequestToIoReader(input)
+	} else {
+		data = ConverntObsRestoreToXml(input)
+	}
+	return
+}
+
+// GetEncryption gets the Encryption field value from SseKmsHeader
+func (header SseKmsHeader) GetEncryption() string {
+	if header.Encryption != "" {
+		return header.Encryption
+	}
+	if !header.isObs {
+		return DEFAULT_SSE_KMS_ENCRYPTION
+	}
+	return DEFAULT_SSE_KMS_ENCRYPTION_OBS
+}
+
+// GetKey gets the Key field value from SseKmsHeader
+func (header SseKmsHeader) GetKey() string {
+	return header.Key
+}
+
+// GetEncryption gets the Encryption field value from SseCHeader
+func (header SseCHeader) GetEncryption() string {
+	if header.Encryption != "" {
+		return header.Encryption
+	}
+	return DEFAULT_SSE_C_ENCRYPTION
+}
+
+// GetKey gets the Key field value from SseCHeader
+func (header SseCHeader) GetKey() string {
+	return header.Key
+}
+
+// GetKeyMD5 gets the KeyMD5 field value from SseCHeader
+func (header SseCHeader) GetKeyMD5() string {
+	if header.KeyMD5 != "" {
+		return header.KeyMD5
+	}
+
+	if ret, err := Base64Decode(header.GetKey()); err == nil {
+		return Base64Md5(ret)
+	}
+	return ""
+}
+
+func setSseHeader(headers map[string][]string, sseHeader ISseHeader, sseCOnly bool, isObs bool) {
+	if sseHeader != nil {
+		if sseCHeader, ok := sseHeader.(SseCHeader); ok {
+			setHeaders(headers, HEADER_SSEC_ENCRYPTION, []string{sseCHeader.GetEncryption()}, isObs)
+			setHeaders(headers, HEADER_SSEC_KEY, []string{sseCHeader.GetKey()}, isObs)
+			setHeaders(headers, HEADER_SSEC_KEY_MD5, []string{sseCHeader.GetKeyMD5()}, isObs)
+		} else if sseKmsHeader, ok := sseHeader.(SseKmsHeader); !sseCOnly && ok {
+			sseKmsHeader.isObs = isObs
+			setHeaders(headers, HEADER_SSEKMS_ENCRYPTION, []string{sseKmsHeader.GetEncryption()}, isObs)
+			if sseKmsHeader.GetKey() != "" {
+				setHeadersNext(headers, HEADER_SSEKMS_KEY_OBS, HEADER_SSEKMS_KEY_AMZ, []string{sseKmsHeader.GetKey()}, isObs)
+			}
+		}
+	}
+}
+
+func (input GetObjectMetadataInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = make(map[string]string)
+	if input.VersionId != "" {
+		params[PARAM_VERSION_ID] = input.VersionId
+	}
+	headers = make(map[string][]string)
+
+	if input.Origin != "" {
+		headers[HEADER_ORIGIN_CAMEL] = []string{input.Origin}
+	}
+
+	if input.RequestHeader != "" {
+		headers[HEADER_ACCESS_CONTROL_REQUEST_HEADER_CAMEL] = []string{input.RequestHeader}
+	}
+	setSseHeader(headers, input.SseHeader, true, isObs)
+	return
+}
+
+func (input SetObjectMetadataInput) prepareContentHeaders(headers map[string][]string) {
+	if input.ContentDisposition != "" {
+		headers[HEADER_CONTENT_DISPOSITION_CAMEL] = []string{input.ContentDisposition}
+	}
+	if input.ContentEncoding != "" {
+		headers[HEADER_CONTENT_ENCODING_CAMEL] = []string{input.ContentEncoding}
+	}
+	if input.ContentLanguage != "" {
+		headers[HEADER_CONTENT_LANGUAGE_CAMEL] = []string{input.ContentLanguage}
+	}
+
+	if input.ContentType != "" {
+		headers[HEADER_CONTENT_TYPE_CAML] = []string{input.ContentType}
+	}
+}
+
+func (input SetObjectMetadataInput) prepareStorageClass(headers map[string][]string, isObs bool) {
+	if storageClass := string(input.StorageClass); storageClass != "" {
+		if !isObs {
+			if storageClass == string(StorageClassWarm) {
+				storageClass = string(storageClassStandardIA)
+			} else if storageClass == string(StorageClassCold) {
+				storageClass = string(storageClassGlacier)
+			}
+		}
+		setHeaders(headers, HEADER_STORAGE_CLASS2, []string{storageClass}, isObs)
+	}
+}
+
+func (input SetObjectMetadataInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = make(map[string]string)
+	params = map[string]string{string(SubResourceMetadata): ""}
+	if input.VersionId != "" {
+		params[PARAM_VERSION_ID] = input.VersionId
+	}
+	headers = make(map[string][]string)
+
+	if directive := string(input.MetadataDirective); directive != "" {
+		setHeaders(headers, HEADER_METADATA_DIRECTIVE, []string{string(input.MetadataDirective)}, isObs)
+	} else {
+		setHeaders(headers, HEADER_METADATA_DIRECTIVE, []string{string(ReplaceNew)}, isObs)
+	}
+	if input.CacheControl != "" {
+		headers[HEADER_CACHE_CONTROL_CAMEL] = []string{input.CacheControl}
+	}
+	input.prepareContentHeaders(headers)
+	if input.Expires != "" {
+		headers[HEADER_EXPIRES_CAMEL] = []string{input.Expires}
+	}
+	if input.WebsiteRedirectLocation != "" {
+		setHeaders(headers, HEADER_WEBSITE_REDIRECT_LOCATION, []string{input.WebsiteRedirectLocation}, isObs)
+	}
+	input.prepareStorageClass(headers, isObs)
+	if input.Metadata != nil {
+		for key, value := range input.Metadata {
+			key = strings.TrimSpace(key)
+			setHeadersNext(headers, HEADER_PREFIX_META_OBS+key, HEADER_PREFIX_META+key, []string{value}, isObs)
+		}
+	}
+	return
+}
+
+func (input GetObjectInput) prepareResponseParams(params map[string]string) {
+	if input.ResponseCacheControl != "" {
+		params[PARAM_RESPONSE_CACHE_CONTROL] = input.ResponseCacheControl
+	}
+	if input.ResponseContentDisposition != "" {
+		params[PARAM_RESPONSE_CONTENT_DISPOSITION] = input.ResponseContentDisposition
+	}
+	if input.ResponseContentEncoding != "" {
+		params[PARAM_RESPONSE_CONTENT_ENCODING] = input.ResponseContentEncoding
+	}
+	if input.ResponseContentLanguage != "" {
+		params[PARAM_RESPONSE_CONTENT_LANGUAGE] = input.ResponseContentLanguage
+	}
+	if input.ResponseContentType != "" {
+		params[PARAM_RESPONSE_CONTENT_TYPE] = input.ResponseContentType
+	}
+	if input.ResponseExpires != "" {
+		params[PARAM_RESPONSE_EXPIRES] = input.ResponseExpires
+	}
+}
+
+func (input GetObjectInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params, headers, data, err = input.GetObjectMetadataInput.trans(isObs)
+	if err != nil {
+		return
+	}
+	input.prepareResponseParams(params)
+	if input.ImageProcess != "" {
+		params[PARAM_IMAGE_PROCESS] = input.ImageProcess
+	}
+	if input.RangeStart >= 0 && input.RangeEnd > input.RangeStart {
+		headers[HEADER_RANGE] = []string{fmt.Sprintf("bytes=%d-%d", input.RangeStart, input.RangeEnd)}
+	}
+
+	if input.IfMatch != "" {
+		headers[HEADER_IF_MATCH] = []string{input.IfMatch}
+	}
+	if input.IfNoneMatch != "" {
+		headers[HEADER_IF_NONE_MATCH] = []string{input.IfNoneMatch}
+	}
+	if !input.IfModifiedSince.IsZero() {
+		headers[HEADER_IF_MODIFIED_SINCE] = []string{FormatUtcToRfc1123(input.IfModifiedSince)}
+	}
+	if !input.IfUnmodifiedSince.IsZero() {
+		headers[HEADER_IF_UNMODIFIED_SINCE] = []string{FormatUtcToRfc1123(input.IfUnmodifiedSince)}
+	}
+	return
+}
+
+func (input ObjectOperationInput) prepareGrantHeaders(headers map[string][]string) {
+	if GrantReadID := input.GrantReadId; GrantReadID != "" {
+		setHeaders(headers, HEADER_GRANT_READ_OBS, []string{GrantReadID}, true)
+	}
+	if GrantReadAcpID := input.GrantReadAcpId; GrantReadAcpID != "" {
+		setHeaders(headers, HEADER_GRANT_READ_ACP_OBS, []string{GrantReadAcpID}, true)
+	}
+	if GrantWriteAcpID := input.GrantWriteAcpId; GrantWriteAcpID != "" {
+		setHeaders(headers, HEADER_GRANT_WRITE_ACP_OBS, []string{GrantWriteAcpID}, true)
+	}
+	if GrantFullControlID := input.GrantFullControlId; GrantFullControlID != "" {
+		setHeaders(headers, HEADER_GRANT_FULL_CONTROL_OBS, []string{GrantFullControlID}, true)
+	}
+}
+
+func (input ObjectOperationInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	headers = make(map[string][]string)
+	params = make(map[string]string)
+	if acl := string(input.ACL); acl != "" {
+		setHeaders(headers, HEADER_ACL, []string{acl}, isObs)
+	}
+	input.prepareGrantHeaders(headers)
+	if storageClass := string(input.StorageClass); storageClass != "" {
+		if !isObs {
+			if storageClass == string(StorageClassWarm) {
+				storageClass = string(storageClassStandardIA)
+			} else if storageClass == string(StorageClassCold) {
+				storageClass = string(storageClassGlacier)
+			}
+		}
+		setHeaders(headers, HEADER_STORAGE_CLASS2, []string{storageClass}, isObs)
+	}
+	if input.WebsiteRedirectLocation != "" {
+		setHeaders(headers, HEADER_WEBSITE_REDIRECT_LOCATION, []string{input.WebsiteRedirectLocation}, isObs)
+
+	}
+	setSseHeader(headers, input.SseHeader, false, isObs)
+	if input.Expires != 0 {
+		setHeaders(headers, HEADER_EXPIRES, []string{Int64ToString(input.Expires)}, true)
+	}
+	if input.Metadata != nil {
+		for key, value := range input.Metadata {
+			key = strings.TrimSpace(key)
+			setHeadersNext(headers, HEADER_PREFIX_META_OBS+key, HEADER_PREFIX_META+key, []string{value}, isObs)
+		}
+	}
+	return
+}
+
+func (input PutObjectBasicInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params, headers, data, err = input.ObjectOperationInput.trans(isObs)
+	if err != nil {
+		return
+	}
+
+	if input.ContentMD5 != "" {
+		headers[HEADER_MD5_CAMEL] = []string{input.ContentMD5}
+	}
+
+	if input.ContentLength > 0 {
+		headers[HEADER_CONTENT_LENGTH_CAMEL] = []string{Int64ToString(input.ContentLength)}
+	}
+	if input.ContentType != "" {
+		headers[HEADER_CONTENT_TYPE_CAML] = []string{input.ContentType}
+	}
+
+	return
+}
+
+func (input PutObjectInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params, headers, data, err = input.PutObjectBasicInput.trans(isObs)
+	if err != nil {
+		return
+	}
+	if input.Body != nil {
+		data = input.Body
+	}
+	return
+}
+
+func (input CopyObjectInput) prepareReplaceHeaders(headers map[string][]string) {
+	if input.CacheControl != "" {
+		headers[HEADER_CACHE_CONTROL] = []string{input.CacheControl}
+	}
+	if input.ContentDisposition != "" {
+		headers[HEADER_CONTENT_DISPOSITION] = []string{input.ContentDisposition}
+	}
+	if input.ContentEncoding != "" {
+		headers[HEADER_CONTENT_ENCODING] = []string{input.ContentEncoding}
+	}
+	if input.ContentLanguage != "" {
+		headers[HEADER_CONTENT_LANGUAGE] = []string{input.ContentLanguage}
+	}
+	if input.ContentType != "" {
+		headers[HEADER_CONTENT_TYPE] = []string{input.ContentType}
+	}
+	if input.Expires != "" {
+		headers[HEADER_EXPIRES] = []string{input.Expires}
+	}
+}
+
+func (input CopyObjectInput) prepareCopySourceHeaders(headers map[string][]string, isObs bool) {
+	if input.CopySourceIfMatch != "" {
+		setHeaders(headers, HEADER_COPY_SOURCE_IF_MATCH, []string{input.CopySourceIfMatch}, isObs)
+	}
+	if input.CopySourceIfNoneMatch != "" {
+		setHeaders(headers, HEADER_COPY_SOURCE_IF_NONE_MATCH, []string{input.CopySourceIfNoneMatch}, isObs)
+	}
+	if !input.CopySourceIfModifiedSince.IsZero() {
+		setHeaders(headers, HEADER_COPY_SOURCE_IF_MODIFIED_SINCE, []string{FormatUtcToRfc1123(input.CopySourceIfModifiedSince)}, isObs)
+	}
+	if !input.CopySourceIfUnmodifiedSince.IsZero() {
+		setHeaders(headers, HEADER_COPY_SOURCE_IF_UNMODIFIED_SINCE, []string{FormatUtcToRfc1123(input.CopySourceIfUnmodifiedSince)}, isObs)
+	}
+}
+
+func (input CopyObjectInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params, headers, data, err = input.ObjectOperationInput.trans(isObs)
+	if err != nil {
+		return
+	}
+
+	var copySource string
+	if input.CopySourceVersionId != "" {
+		copySource = fmt.Sprintf("%s/%s?versionId=%s", input.CopySourceBucket, UrlEncode(input.CopySourceKey, false), input.CopySourceVersionId)
+	} else {
+		copySource = fmt.Sprintf("%s/%s", input.CopySourceBucket, UrlEncode(input.CopySourceKey, false))
+	}
+	setHeaders(headers, HEADER_COPY_SOURCE, []string{copySource}, isObs)
+
+	if directive := string(input.MetadataDirective); directive != "" {
+		setHeaders(headers, HEADER_METADATA_DIRECTIVE, []string{directive}, isObs)
+	}
+
+	if input.MetadataDirective == ReplaceMetadata {
+		input.prepareReplaceHeaders(headers)
+	}
+
+	input.prepareCopySourceHeaders(headers, isObs)
+	if input.SourceSseHeader != nil {
+		if sseCHeader, ok := input.SourceSseHeader.(SseCHeader); ok {
+			setHeaders(headers, HEADER_SSEC_COPY_SOURCE_ENCRYPTION, []string{sseCHeader.GetEncryption()}, isObs)
+			setHeaders(headers, HEADER_SSEC_COPY_SOURCE_KEY, []string{sseCHeader.GetKey()}, isObs)
+			setHeaders(headers, HEADER_SSEC_COPY_SOURCE_KEY_MD5, []string{sseCHeader.GetKeyMD5()}, isObs)
+		}
+	}
+	if input.SuccessActionRedirect != "" {
+		headers[HEADER_SUCCESS_ACTION_REDIRECT] = []string{input.SuccessActionRedirect}
+	}
+	return
+}
+
+func (input AbortMultipartUploadInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{"uploadId": input.UploadId}
+	return
+}
+
+func (input InitiateMultipartUploadInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params, headers, data, err = input.ObjectOperationInput.trans(isObs)
+	if err != nil {
+		return
+	}
+	if input.ContentType != "" {
+		headers[HEADER_CONTENT_TYPE_CAML] = []string{input.ContentType}
+	}
+	params[string(SubResourceUploads)] = ""
+	return
+}
+
+func (input UploadPartInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{"uploadId": input.UploadId, "partNumber": IntToString(input.PartNumber)}
+	headers = make(map[string][]string)
+	setSseHeader(headers, input.SseHeader, true, isObs)
+	if input.ContentMD5 != "" {
+		headers[HEADER_MD5_CAMEL] = []string{input.ContentMD5}
+	}
+	if input.Body != nil {
+		data = input.Body
+	}
+	return
+}
+
+func (input CompleteMultipartUploadInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{"uploadId": input.UploadId}
+	data, _ = ConvertCompleteMultipartUploadInputToXml(input, false)
+	return
+}
+
+func (input ListPartsInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{"uploadId": input.UploadId}
+	if input.MaxParts > 0 {
+		params["max-parts"] = IntToString(input.MaxParts)
+	}
+	if input.PartNumberMarker > 0 {
+		params["part-number-marker"] = IntToString(input.PartNumberMarker)
+	}
+	return
+}
+
+func (input CopyPartInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = map[string]string{"uploadId": input.UploadId, "partNumber": IntToString(input.PartNumber)}
+	headers = make(map[string][]string, 1)
+	var copySource string
+	if input.CopySourceVersionId != "" {
+		copySource = fmt.Sprintf("%s/%s?versionId=%s", input.CopySourceBucket, UrlEncode(input.CopySourceKey, false), input.CopySourceVersionId)
+	} else {
+		copySource = fmt.Sprintf("%s/%s", input.CopySourceBucket, UrlEncode(input.CopySourceKey, false))
+	}
+	setHeaders(headers, HEADER_COPY_SOURCE, []string{copySource}, isObs)
+	if input.CopySourceRangeStart >= 0 && input.CopySourceRangeEnd > input.CopySourceRangeStart {
+		setHeaders(headers, HEADER_COPY_SOURCE_RANGE, []string{fmt.Sprintf("bytes=%d-%d", input.CopySourceRangeStart, input.CopySourceRangeEnd)}, isObs)
+	}
+
+	setSseHeader(headers, input.SseHeader, true, isObs)
+	if input.SourceSseHeader != nil {
+		if sseCHeader, ok := input.SourceSseHeader.(SseCHeader); ok {
+			setHeaders(headers, HEADER_SSEC_COPY_SOURCE_ENCRYPTION, []string{sseCHeader.GetEncryption()}, isObs)
+			setHeaders(headers, HEADER_SSEC_COPY_SOURCE_KEY, []string{sseCHeader.GetKey()}, isObs)
+			setHeaders(headers, HEADER_SSEC_COPY_SOURCE_KEY_MD5, []string{sseCHeader.GetKeyMD5()}, isObs)
+		}
+
+	}
+	return
+}
+
+func (input HeadObjectInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	params = make(map[string]string)
+	if input.VersionId != "" {
+		params[PARAM_VERSION_ID] = input.VersionId
+	}
+	return
+}
+
+func (input SetBucketRequestPaymentInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	return trans(SubResourceRequestPayment, input)
+}
+
+type partSlice []Part
+
+func (parts partSlice) Len() int {
+	return len(parts)
+}
+
+func (parts partSlice) Less(i, j int) bool {
+	return parts[i].PartNumber < parts[j].PartNumber
+}
+
+func (parts partSlice) Swap(i, j int) {
+	parts[i], parts[j] = parts[j], parts[i]
+}
+
+type readerWrapper struct {
+	reader      io.Reader
+	mark        int64
+	totalCount  int64
+	readedCount int64
+}
+
+func (rw *readerWrapper) seek(offset int64, whence int) (int64, error) {
+	if r, ok := rw.reader.(*strings.Reader); ok {
+		return r.Seek(offset, whence)
+	} else if r, ok := rw.reader.(*bytes.Reader); ok {
+		return r.Seek(offset, whence)
+	} else if r, ok := rw.reader.(*os.File); ok {
+		return r.Seek(offset, whence)
+	}
+	return offset, nil
+}
+
+func (rw *readerWrapper) Read(p []byte) (n int, err error) {
+	if rw.totalCount == 0 {
+		return 0, io.EOF
+	}
+	if rw.totalCount > 0 {
+		n, err = rw.reader.Read(p)
+		readedOnce := int64(n)
+		remainCount := rw.totalCount - rw.readedCount
+		if remainCount > readedOnce {
+			rw.readedCount += readedOnce
+			return n, err
+		}
+		rw.readedCount += remainCount
+		return int(remainCount), io.EOF
+	}
+	return rw.reader.Read(p)
+}
+
+type fileReaderWrapper struct {
+	readerWrapper
+	filePath string
+}
+
+func (input SetBucketFetchPolicyInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	contentType, _ := mimeTypes["json"]
+	headers = make(map[string][]string, 2)
+	headers[HEADER_CONTENT_TYPE] = []string{contentType}
+	setHeaders(headers, headerOefMarker, []string{"yes"}, isObs)
+	data, err = convertFetchPolicyToJSON(input)
+	return
+}
+
+func (input GetBucketFetchPolicyInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	headers = make(map[string][]string, 1)
+	setHeaders(headers, headerOefMarker, []string{"yes"}, isObs)
+	return
+}
+
+func (input DeleteBucketFetchPolicyInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	headers = make(map[string][]string, 1)
+	setHeaders(headers, headerOefMarker, []string{"yes"}, isObs)
+	return
+}
+
+func (input SetBucketFetchJobInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	contentType, _ := mimeTypes["json"]
+	headers = make(map[string][]string, 2)
+	headers[HEADER_CONTENT_TYPE] = []string{contentType}
+	setHeaders(headers, headerOefMarker, []string{"yes"}, isObs)
+	data, err = convertFetchJobToJSON(input)
+	return
+}
+
+func (input GetBucketFetchJobInput) trans(isObs bool) (params map[string]string, headers map[string][]string, data interface{}, err error) {
+	headers = make(map[string][]string, 1)
+	setHeaders(headers, headerOefMarker, []string{"yes"}, isObs)
+	return
+}

modules/obs/transfer.go

@@ -0,0 +1,873 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:golint, unused
+package obs
+
+import (
+	"bufio"
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"sync"
+	"sync/atomic"
+	"syscall"
+)
+
+var errAbort = errors.New("AbortError")
+
+// FileStatus defines the upload file properties
+type FileStatus struct {
+	XMLName      xml.Name `xml:"FileInfo"`
+	LastModified int64    `xml:"LastModified"`
+	Size         int64    `xml:"Size"`
+}
+
+// UploadPartInfo defines the upload part properties
+type UploadPartInfo struct {
+	XMLName     xml.Name `xml:"UploadPart"`
+	PartNumber  int      `xml:"PartNumber"`
+	Etag        string   `xml:"Etag"`
+	PartSize    int64    `xml:"PartSize"`
+	Offset      int64    `xml:"Offset"`
+	IsCompleted bool     `xml:"IsCompleted"`
+}
+
+// UploadCheckpoint defines the upload checkpoint file properties
+type UploadCheckpoint struct {
+	XMLName     xml.Name         `xml:"UploadFileCheckpoint"`
+	Bucket      string           `xml:"Bucket"`
+	Key         string           `xml:"Key"`
+	UploadId    string           `xml:"UploadId,omitempty"`
+	UploadFile  string           `xml:"FileUrl"`
+	FileInfo    FileStatus       `xml:"FileInfo"`
+	UploadParts []UploadPartInfo `xml:"UploadParts>UploadPart"`
+}
+
+func (ufc *UploadCheckpoint) isValid(bucket, key, uploadFile string, fileStat os.FileInfo) bool {
+	if ufc.Bucket != bucket || ufc.Key != key || ufc.UploadFile != uploadFile {
+		doLog(LEVEL_INFO, "Checkpoint file is invalid, the bucketName or objectKey or uploadFile was changed. clear the record.")
+		return false
+	}
+
+	if ufc.FileInfo.Size != fileStat.Size() || ufc.FileInfo.LastModified != fileStat.ModTime().Unix() {
+		doLog(LEVEL_INFO, "Checkpoint file is invalid, the uploadFile was changed. clear the record.")
+		return false
+	}
+
+	if ufc.UploadId == "" {
+		doLog(LEVEL_INFO, "UploadId is invalid. clear the record.")
+		return false
+	}
+
+	return true
+}
+
+type uploadPartTask struct {
+	UploadPartInput
+	obsClient        *ObsClient
+	abort            *int32
+	extensions       []extensionOptions
+	enableCheckpoint bool
+}
+
+func (task *uploadPartTask) Run() interface{} {
+	if atomic.LoadInt32(task.abort) == 1 {
+		return errAbort
+	}
+
+	input := &UploadPartInput{}
+	input.Bucket = task.Bucket
+	input.Key = task.Key
+	input.PartNumber = task.PartNumber
+	input.UploadId = task.UploadId
+	input.SseHeader = task.SseHeader
+	input.SourceFile = task.SourceFile
+	input.Offset = task.Offset
+	input.PartSize = task.PartSize
+	extensions := task.extensions
+
+	var output *UploadPartOutput
+	var err error
+	if extensions != nil {
+		output, err = task.obsClient.UploadPart(input, extensions...)
+	} else {
+		output, err = task.obsClient.UploadPart(input)
+	}
+
+	if err == nil {
+		if output.ETag == "" {
+			doLog(LEVEL_WARN, "Get invalid etag value after uploading part [%d].", task.PartNumber)
+			if !task.enableCheckpoint {
+				atomic.CompareAndSwapInt32(task.abort, 0, 1)
+				doLog(LEVEL_WARN, "Task is aborted, part number is [%d]", task.PartNumber)
+			}
+			return fmt.Errorf("get invalid etag value after uploading part [%d]", task.PartNumber)
+		}
+		return output
+	} else if obsError, ok := err.(ObsError); ok && obsError.StatusCode >= 400 && obsError.StatusCode < 500 {
+		atomic.CompareAndSwapInt32(task.abort, 0, 1)
+		doLog(LEVEL_WARN, "Task is aborted, part number is [%d]", task.PartNumber)
+	}
+	return err
+}
+
+func loadCheckpointFile(checkpointFile string, result interface{}) error {
+	ret, err := ioutil.ReadFile(checkpointFile)
+	if err != nil {
+		return err
+	}
+	if len(ret) == 0 {
+		return nil
+	}
+	return xml.Unmarshal(ret, result)
+}
+
+func updateCheckpointFile(fc interface{}, checkpointFilePath string) error {
+	result, err := xml.Marshal(fc)
+	if err != nil {
+		return err
+	}
+	err = ioutil.WriteFile(checkpointFilePath, result, 0666)
+	return err
+}
+
+func getCheckpointFile(ufc *UploadCheckpoint, uploadFileStat os.FileInfo, input *UploadFileInput, obsClient *ObsClient, extensions []extensionOptions) (needCheckpoint bool, err error) {
+	checkpointFilePath := input.CheckpointFile
+	checkpointFileStat, err := os.Stat(checkpointFilePath)
+	if err != nil {
+		doLog(LEVEL_DEBUG, fmt.Sprintf("Stat checkpoint file failed with error: [%v].", err))
+		return true, nil
+	}
+	if checkpointFileStat.IsDir() {
+		doLog(LEVEL_ERROR, "Checkpoint file can not be a folder.")
+		return false, errors.New("checkpoint file can not be a folder")
+	}
+	err = loadCheckpointFile(checkpointFilePath, ufc)
+	if err != nil {
+		doLog(LEVEL_WARN, fmt.Sprintf("Load checkpoint file failed with error: [%v].", err))
+		return true, nil
+	} else if !ufc.isValid(input.Bucket, input.Key, input.UploadFile, uploadFileStat) {
+		if ufc.Bucket != "" && ufc.Key != "" && ufc.UploadId != "" {
+			_err := abortTask(ufc.Bucket, ufc.Key, ufc.UploadId, obsClient, extensions)
+			if _err != nil {
+				doLog(LEVEL_WARN, "Failed to abort upload task [%s].", ufc.UploadId)
+			}
+		}
+		_err := os.Remove(checkpointFilePath)
+		if _err != nil {
+			doLog(LEVEL_WARN, fmt.Sprintf("Failed to remove checkpoint file with error: [%v].", _err))
+		}
+	} else {
+		return false, nil
+	}
+
+	return true, nil
+}
+
+func prepareUpload(ufc *UploadCheckpoint, uploadFileStat os.FileInfo, input *UploadFileInput, obsClient *ObsClient, extensions []extensionOptions) error {
+	initiateInput := &InitiateMultipartUploadInput{}
+	initiateInput.ObjectOperationInput = input.ObjectOperationInput
+	initiateInput.ContentType = input.ContentType
+	var output *InitiateMultipartUploadOutput
+	var err error
+	if extensions != nil {
+		output, err = obsClient.InitiateMultipartUpload(initiateInput, extensions...)
+	} else {
+		output, err = obsClient.InitiateMultipartUpload(initiateInput)
+	}
+	if err != nil {
+		return err
+	}
+
+	ufc.Bucket = input.Bucket
+	ufc.Key = input.Key
+	ufc.UploadFile = input.UploadFile
+	ufc.FileInfo = FileStatus{}
+	ufc.FileInfo.Size = uploadFileStat.Size()
+	ufc.FileInfo.LastModified = uploadFileStat.ModTime().Unix()
+	ufc.UploadId = output.UploadId
+
+	err = sliceFile(input.PartSize, ufc)
+	return err
+}
+
+func sliceFile(partSize int64, ufc *UploadCheckpoint) error {
+	fileSize := ufc.FileInfo.Size
+	cnt := fileSize / partSize
+	if cnt >= 10000 {
+		partSize = fileSize / 10000
+		if fileSize%10000 != 0 {
+			partSize++
+		}
+		cnt = fileSize / partSize
+	}
+	if fileSize%partSize != 0 {
+		cnt++
+	}
+
+	if partSize > MAX_PART_SIZE {
+		doLog(LEVEL_ERROR, "The source upload file is too large")
+		return fmt.Errorf("The source upload file is too large")
+	}
+
+	if cnt == 0 {
+		uploadPart := UploadPartInfo{}
+		uploadPart.PartNumber = 1
+		ufc.UploadParts = []UploadPartInfo{uploadPart}
+	} else {
+		uploadParts := make([]UploadPartInfo, 0, cnt)
+		var i int64
+		for i = 0; i < cnt; i++ {
+			uploadPart := UploadPartInfo{}
+			uploadPart.PartNumber = int(i) + 1
+			uploadPart.PartSize = partSize
+			uploadPart.Offset = i * partSize
+			uploadParts = append(uploadParts, uploadPart)
+		}
+		if value := fileSize % partSize; value != 0 {
+			uploadParts[cnt-1].PartSize = value
+		}
+		ufc.UploadParts = uploadParts
+	}
+	return nil
+}
+
+func abortTask(bucket, key, uploadID string, obsClient *ObsClient, extensions []extensionOptions) error {
+	input := &AbortMultipartUploadInput{}
+	input.Bucket = bucket
+	input.Key = key
+	input.UploadId = uploadID
+	if extensions != nil {
+		_, err := obsClient.AbortMultipartUpload(input, extensions...)
+		return err
+	}
+	_, err := obsClient.AbortMultipartUpload(input)
+	return err
+}
+
+func handleUploadFileResult(uploadPartError error, ufc *UploadCheckpoint, enableCheckpoint bool, obsClient *ObsClient, extensions []extensionOptions) error {
+	if uploadPartError != nil {
+		if enableCheckpoint {
+			return uploadPartError
+		}
+		_err := abortTask(ufc.Bucket, ufc.Key, ufc.UploadId, obsClient, extensions)
+		if _err != nil {
+			doLog(LEVEL_WARN, "Failed to abort task [%s].", ufc.UploadId)
+		}
+		return uploadPartError
+	}
+	return nil
+}
+
+func completeParts(ufc *UploadCheckpoint, enableCheckpoint bool, checkpointFilePath string, obsClient *ObsClient, extensions []extensionOptions) (output *CompleteMultipartUploadOutput, err error) {
+	completeInput := &CompleteMultipartUploadInput{}
+	completeInput.Bucket = ufc.Bucket
+	completeInput.Key = ufc.Key
+	completeInput.UploadId = ufc.UploadId
+	parts := make([]Part, 0, len(ufc.UploadParts))
+	for _, uploadPart := range ufc.UploadParts {
+		part := Part{}
+		part.PartNumber = uploadPart.PartNumber
+		part.ETag = uploadPart.Etag
+		parts = append(parts, part)
+	}
+	completeInput.Parts = parts
+	var completeOutput *CompleteMultipartUploadOutput
+	if extensions != nil {
+		completeOutput, err = obsClient.CompleteMultipartUpload(completeInput, extensions...)
+	} else {
+		completeOutput, err = obsClient.CompleteMultipartUpload(completeInput)
+	}
+
+	if err == nil {
+		if enableCheckpoint {
+			_err := os.Remove(checkpointFilePath)
+			if _err != nil {
+				doLog(LEVEL_WARN, "Upload file successfully, but remove checkpoint file failed with error [%v].", _err)
+			}
+		}
+		return completeOutput, err
+	}
+	if !enableCheckpoint {
+		_err := abortTask(ufc.Bucket, ufc.Key, ufc.UploadId, obsClient, extensions)
+		if _err != nil {
+			doLog(LEVEL_WARN, "Failed to abort task [%s].", ufc.UploadId)
+		}
+	}
+	return completeOutput, err
+}
+
+func (obsClient ObsClient) resumeUpload(input *UploadFileInput, extensions []extensionOptions) (output *CompleteMultipartUploadOutput, err error) {
+	uploadFileStat, err := os.Stat(input.UploadFile)
+	if err != nil {
+		doLog(LEVEL_ERROR, fmt.Sprintf("Failed to stat uploadFile with error: [%v].", err))
+		return nil, err
+	}
+	if uploadFileStat.IsDir() {
+		doLog(LEVEL_ERROR, "UploadFile can not be a folder.")
+		return nil, errors.New("uploadFile can not be a folder")
+	}
+
+	ufc := &UploadCheckpoint{}
+
+	var needCheckpoint = true
+	var checkpointFilePath = input.CheckpointFile
+	var enableCheckpoint = input.EnableCheckpoint
+	if enableCheckpoint {
+		needCheckpoint, err = getCheckpointFile(ufc, uploadFileStat, input, &obsClient, extensions)
+		if err != nil {
+			return nil, err
+		}
+	}
+	if needCheckpoint {
+		err = prepareUpload(ufc, uploadFileStat, input, &obsClient, extensions)
+		if err != nil {
+			return nil, err
+		}
+
+		if enableCheckpoint {
+			err = updateCheckpointFile(ufc, checkpointFilePath)
+			if err != nil {
+				doLog(LEVEL_ERROR, "Failed to update checkpoint file with error [%v].", err)
+				_err := abortTask(ufc.Bucket, ufc.Key, ufc.UploadId, &obsClient, extensions)
+				if _err != nil {
+					doLog(LEVEL_WARN, "Failed to abort task [%s].", ufc.UploadId)
+				}
+				return nil, err
+			}
+		}
+	}
+
+	uploadPartError := obsClient.uploadPartConcurrent(ufc, checkpointFilePath, input, extensions)
+	err = handleUploadFileResult(uploadPartError, ufc, enableCheckpoint, &obsClient, extensions)
+	if err != nil {
+		return nil, err
+	}
+
+	completeOutput, err := completeParts(ufc, enableCheckpoint, checkpointFilePath, &obsClient, extensions)
+
+	return completeOutput, err
+}
+
+func handleUploadTaskResult(result interface{}, ufc *UploadCheckpoint, partNum int, enableCheckpoint bool, checkpointFilePath string, lock *sync.Mutex) (err error) {
+	if uploadPartOutput, ok := result.(*UploadPartOutput); ok {
+		lock.Lock()
+		defer lock.Unlock()
+		ufc.UploadParts[partNum-1].Etag = uploadPartOutput.ETag
+		ufc.UploadParts[partNum-1].IsCompleted = true
+		if enableCheckpoint {
+			_err := updateCheckpointFile(ufc, checkpointFilePath)
+			if _err != nil {
+				doLog(LEVEL_WARN, "Failed to update checkpoint file with error [%v].", _err)
+			}
+		}
+	} else if result != errAbort {
+		if _err, ok := result.(error); ok {
+			err = _err
+		}
+	}
+	return
+}
+
+func (obsClient ObsClient) uploadPartConcurrent(ufc *UploadCheckpoint, checkpointFilePath string, input *UploadFileInput, extensions []extensionOptions) error {
+	pool := NewRoutinePool(input.TaskNum, MAX_PART_NUM)
+	var uploadPartError atomic.Value
+	var errFlag int32
+	var abort int32
+	lock := new(sync.Mutex)
+	for _, uploadPart := range ufc.UploadParts {
+		if atomic.LoadInt32(&abort) == 1 {
+			break
+		}
+		if uploadPart.IsCompleted {
+			continue
+		}
+		task := uploadPartTask{
+			UploadPartInput: UploadPartInput{
+				Bucket:     ufc.Bucket,
+				Key:        ufc.Key,
+				PartNumber: uploadPart.PartNumber,
+				UploadId:   ufc.UploadId,
+				SseHeader:  input.SseHeader,
+				SourceFile: input.UploadFile,
+				Offset:     uploadPart.Offset,
+				PartSize:   uploadPart.PartSize,
+			},
+			obsClient:        &obsClient,
+			abort:            &abort,
+			extensions:       extensions,
+			enableCheckpoint: input.EnableCheckpoint,
+		}
+		pool.ExecuteFunc(func() interface{} {
+			result := task.Run()
+			err := handleUploadTaskResult(result, ufc, task.PartNumber, input.EnableCheckpoint, input.CheckpointFile, lock)
+			if err != nil && atomic.CompareAndSwapInt32(&errFlag, 0, 1) {
+				uploadPartError.Store(err)
+			}
+			return nil
+		})
+	}
+	pool.ShutDown()
+	if err, ok := uploadPartError.Load().(error); ok {
+		return err
+	}
+	return nil
+}
+
+// ObjectInfo defines download object info
+type ObjectInfo struct {
+	XMLName      xml.Name `xml:"ObjectInfo"`
+	LastModified int64    `xml:"LastModified"`
+	Size         int64    `xml:"Size"`
+	ETag         string   `xml:"ETag"`
+}
+
+// TempFileInfo defines temp download file properties
+type TempFileInfo struct {
+	XMLName     xml.Name `xml:"TempFileInfo"`
+	TempFileUrl string   `xml:"TempFileUrl"`
+	Size        int64    `xml:"Size"`
+}
+
+// DownloadPartInfo defines download part properties
+type DownloadPartInfo struct {
+	XMLName     xml.Name `xml:"DownloadPart"`
+	PartNumber  int64    `xml:"PartNumber"`
+	RangeEnd    int64    `xml:"RangeEnd"`
+	Offset      int64    `xml:"Offset"`
+	IsCompleted bool     `xml:"IsCompleted"`
+}
+
+// DownloadCheckpoint defines download checkpoint file properties
+type DownloadCheckpoint struct {
+	XMLName       xml.Name           `xml:"DownloadFileCheckpoint"`
+	Bucket        string             `xml:"Bucket"`
+	Key           string             `xml:"Key"`
+	VersionId     string             `xml:"VersionId,omitempty"`
+	DownloadFile  string             `xml:"FileUrl"`
+	ObjectInfo    ObjectInfo         `xml:"ObjectInfo"`
+	TempFileInfo  TempFileInfo       `xml:"TempFileInfo"`
+	DownloadParts []DownloadPartInfo `xml:"DownloadParts>DownloadPart"`
+}
+
+func (dfc *DownloadCheckpoint) isValid(input *DownloadFileInput, output *GetObjectMetadataOutput) bool {
+	if dfc.Bucket != input.Bucket || dfc.Key != input.Key || dfc.VersionId != input.VersionId || dfc.DownloadFile != input.DownloadFile {
+		doLog(LEVEL_INFO, "Checkpoint file is invalid, the bucketName or objectKey or downloadFile was changed. clear the record.")
+		return false
+	}
+	if dfc.ObjectInfo.LastModified != output.LastModified.Unix() || dfc.ObjectInfo.ETag != output.ETag || dfc.ObjectInfo.Size != output.ContentLength {
+		doLog(LEVEL_INFO, "Checkpoint file is invalid, the object info was changed. clear the record.")
+		return false
+	}
+	if dfc.TempFileInfo.Size != output.ContentLength {
+		doLog(LEVEL_INFO, "Checkpoint file is invalid, size was changed. clear the record.")
+		return false
+	}
+	stat, err := os.Stat(dfc.TempFileInfo.TempFileUrl)
+	if err != nil || stat.Size() != dfc.ObjectInfo.Size {
+		doLog(LEVEL_INFO, "Checkpoint file is invalid, the temp download file was changed. clear the record.")
+		return false
+	}
+
+	return true
+}
+
+type downloadPartTask struct {
+	GetObjectInput
+	obsClient        *ObsClient
+	extensions       []extensionOptions
+	abort            *int32
+	partNumber       int64
+	tempFileURL      string
+	enableCheckpoint bool
+}
+
+func (task *downloadPartTask) Run() interface{} {
+	if atomic.LoadInt32(task.abort) == 1 {
+		return errAbort
+	}
+	getObjectInput := &GetObjectInput{}
+	getObjectInput.GetObjectMetadataInput = task.GetObjectMetadataInput
+	getObjectInput.IfMatch = task.IfMatch
+	getObjectInput.IfNoneMatch = task.IfNoneMatch
+	getObjectInput.IfModifiedSince = task.IfModifiedSince
+	getObjectInput.IfUnmodifiedSince = task.IfUnmodifiedSince
+	getObjectInput.RangeStart = task.RangeStart
+	getObjectInput.RangeEnd = task.RangeEnd
+
+	var output *GetObjectOutput
+	var err error
+	if task.extensions != nil {
+		output, err = task.obsClient.GetObject(getObjectInput, task.extensions...)
+	} else {
+		output, err = task.obsClient.GetObject(getObjectInput)
+	}
+
+	if err == nil {
+		defer func() {
+			errMsg := output.Body.Close()
+			if errMsg != nil {
+				doLog(LEVEL_WARN, "Failed to close response body.")
+			}
+		}()
+		_err := updateDownloadFile(task.tempFileURL, task.RangeStart, output)
+		if _err != nil {
+			if !task.enableCheckpoint {
+				atomic.CompareAndSwapInt32(task.abort, 0, 1)
+				doLog(LEVEL_WARN, "Task is aborted, part number is [%d]", task.partNumber)
+			}
+			return _err
+		}
+		return output
+	} else if obsError, ok := err.(ObsError); ok && obsError.StatusCode >= 400 && obsError.StatusCode < 500 {
+		atomic.CompareAndSwapInt32(task.abort, 0, 1)
+		doLog(LEVEL_WARN, "Task is aborted, part number is [%d]", task.partNumber)
+	}
+	return err
+}
+
+func getObjectInfo(input *DownloadFileInput, obsClient *ObsClient, extensions []extensionOptions) (getObjectmetaOutput *GetObjectMetadataOutput, err error) {
+	if extensions != nil {
+		getObjectmetaOutput, err = obsClient.GetObjectMetadata(&input.GetObjectMetadataInput, extensions...)
+	} else {
+		getObjectmetaOutput, err = obsClient.GetObjectMetadata(&input.GetObjectMetadataInput)
+	}
+
+	return
+}
+
+func getDownloadCheckpointFile(dfc *DownloadCheckpoint, input *DownloadFileInput, output *GetObjectMetadataOutput) (needCheckpoint bool, err error) {
+	checkpointFilePath := input.CheckpointFile
+	checkpointFileStat, err := os.Stat(checkpointFilePath)
+	if err != nil {
+		doLog(LEVEL_DEBUG, fmt.Sprintf("Stat checkpoint file failed with error: [%v].", err))
+		return true, nil
+	}
+	if checkpointFileStat.IsDir() {
+		doLog(LEVEL_ERROR, "Checkpoint file can not be a folder.")
+		return false, errors.New("checkpoint file can not be a folder")
+	}
+	err = loadCheckpointFile(checkpointFilePath, dfc)
+	if err != nil {
+		doLog(LEVEL_WARN, fmt.Sprintf("Load checkpoint file failed with error: [%v].", err))
+		return true, nil
+	} else if !dfc.isValid(input, output) {
+		if dfc.TempFileInfo.TempFileUrl != "" {
+			_err := os.Remove(dfc.TempFileInfo.TempFileUrl)
+			if _err != nil {
+				doLog(LEVEL_WARN, "Failed to remove temp download file with error [%v].", _err)
+			}
+		}
+		_err := os.Remove(checkpointFilePath)
+		if _err != nil {
+			doLog(LEVEL_WARN, "Failed to remove checkpoint file with error [%v].", _err)
+		}
+	} else {
+		return false, nil
+	}
+
+	return true, nil
+}
+
+func sliceObject(objectSize, partSize int64, dfc *DownloadCheckpoint) {
+	cnt := objectSize / partSize
+	if objectSize%partSize > 0 {
+		cnt++
+	}
+
+	if cnt == 0 {
+		downloadPart := DownloadPartInfo{}
+		downloadPart.PartNumber = 1
+		dfc.DownloadParts = []DownloadPartInfo{downloadPart}
+	} else {
+		downloadParts := make([]DownloadPartInfo, 0, cnt)
+		var i int64
+		for i = 0; i < cnt; i++ {
+			downloadPart := DownloadPartInfo{}
+			downloadPart.PartNumber = i + 1
+			downloadPart.Offset = i * partSize
+			downloadPart.RangeEnd = (i+1)*partSize - 1
+			downloadParts = append(downloadParts, downloadPart)
+		}
+		dfc.DownloadParts = downloadParts
+		if value := objectSize % partSize; value > 0 {
+			dfc.DownloadParts[cnt-1].RangeEnd = dfc.ObjectInfo.Size - 1
+		}
+	}
+}
+
+func createFile(tempFileURL string, fileSize int64) error {
+	fd, err := syscall.Open(tempFileURL, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
+	if err != nil {
+		doLog(LEVEL_WARN, "Failed to open temp download file [%s].", tempFileURL)
+		return err
+	}
+	defer func() {
+		errMsg := syscall.Close(fd)
+		if errMsg != nil {
+			doLog(LEVEL_WARN, "Failed to close file with error [%v].", errMsg)
+		}
+	}()
+	err = syscall.Ftruncate(fd, fileSize)
+	if err != nil {
+		doLog(LEVEL_WARN, "Failed to create file with error [%v].", err)
+	}
+	return err
+}
+
+func prepareTempFile(tempFileURL string, fileSize int64) error {
+	parentDir := filepath.Dir(tempFileURL)
+	stat, err := os.Stat(parentDir)
+	if err != nil {
+		doLog(LEVEL_DEBUG, "Failed to stat path with error [%v].", err)
+		_err := os.MkdirAll(parentDir, os.ModePerm)
+		if _err != nil {
+			doLog(LEVEL_ERROR, "Failed to make dir with error [%v].", _err)
+			return _err
+		}
+	} else if !stat.IsDir() {
+		doLog(LEVEL_ERROR, "Cannot create folder [%s] due to a same file exists.", parentDir)
+		return fmt.Errorf("cannot create folder [%s] due to a same file exists", parentDir)
+	}
+
+	err = createFile(tempFileURL, fileSize)
+	if err == nil {
+		return nil
+	}
+	fd, err := os.OpenFile(tempFileURL, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
+	if err != nil {
+		doLog(LEVEL_ERROR, "Failed to open temp download file [%s].", tempFileURL)
+		return err
+	}
+	defer func() {
+		errMsg := fd.Close()
+		if errMsg != nil {
+			doLog(LEVEL_WARN, "Failed to close file with error [%v].", errMsg)
+		}
+	}()
+	if fileSize > 0 {
+		_, err = fd.WriteAt([]byte("a"), fileSize-1)
+		if err != nil {
+			doLog(LEVEL_ERROR, "Failed to create temp download file with error [%v].", err)
+			return err
+		}
+	}
+
+	return nil
+}
+
+func handleDownloadFileResult(tempFileURL string, enableCheckpoint bool, downloadFileError error) error {
+	if downloadFileError != nil {
+		if !enableCheckpoint {
+			_err := os.Remove(tempFileURL)
+			if _err != nil {
+				doLog(LEVEL_WARN, "Failed to remove temp download file with error [%v].", _err)
+			}
+		}
+		return downloadFileError
+	}
+	return nil
+}
+
+func (obsClient ObsClient) resumeDownload(input *DownloadFileInput, extensions []extensionOptions) (output *GetObjectMetadataOutput, err error) {
+	getObjectmetaOutput, err := getObjectInfo(input, &obsClient, extensions)
+	if err != nil {
+		return nil, err
+	}
+
+	objectSize := getObjectmetaOutput.ContentLength
+	partSize := input.PartSize
+	dfc := &DownloadCheckpoint{}
+
+	var needCheckpoint = true
+	var checkpointFilePath = input.CheckpointFile
+	var enableCheckpoint = input.EnableCheckpoint
+	if enableCheckpoint {
+		needCheckpoint, err = getDownloadCheckpointFile(dfc, input, getObjectmetaOutput)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if needCheckpoint {
+		dfc.Bucket = input.Bucket
+		dfc.Key = input.Key
+		dfc.VersionId = input.VersionId
+		dfc.DownloadFile = input.DownloadFile
+		dfc.ObjectInfo = ObjectInfo{}
+		dfc.ObjectInfo.LastModified = getObjectmetaOutput.LastModified.Unix()
+		dfc.ObjectInfo.Size = getObjectmetaOutput.ContentLength
+		dfc.ObjectInfo.ETag = getObjectmetaOutput.ETag
+		dfc.TempFileInfo = TempFileInfo{}
+		dfc.TempFileInfo.TempFileUrl = input.DownloadFile + ".tmp"
+		dfc.TempFileInfo.Size = getObjectmetaOutput.ContentLength
+
+		sliceObject(objectSize, partSize, dfc)
+		_err := prepareTempFile(dfc.TempFileInfo.TempFileUrl, dfc.TempFileInfo.Size)
+		if _err != nil {
+			return nil, _err
+		}
+
+		if enableCheckpoint {
+			_err := updateCheckpointFile(dfc, checkpointFilePath)
+			if _err != nil {
+				doLog(LEVEL_ERROR, "Failed to update checkpoint file with error [%v].", _err)
+				_errMsg := os.Remove(dfc.TempFileInfo.TempFileUrl)
+				if _errMsg != nil {
+					doLog(LEVEL_WARN, "Failed to remove temp download file with error [%v].", _errMsg)
+				}
+				return nil, _err
+			}
+		}
+	}
+
+	downloadFileError := obsClient.downloadFileConcurrent(input, dfc, extensions)
+	err = handleDownloadFileResult(dfc.TempFileInfo.TempFileUrl, enableCheckpoint, downloadFileError)
+	if err != nil {
+		return nil, err
+	}
+
+	err = os.Rename(dfc.TempFileInfo.TempFileUrl, input.DownloadFile)
+	if err != nil {
+		doLog(LEVEL_ERROR, "Failed to rename temp download file [%s] to download file [%s] with error [%v].", dfc.TempFileInfo.TempFileUrl, input.DownloadFile, err)
+		return nil, err
+	}
+	if enableCheckpoint {
+		err = os.Remove(checkpointFilePath)
+		if err != nil {
+			doLog(LEVEL_WARN, "Download file successfully, but remove checkpoint file failed with error [%v].", err)
+		}
+	}
+
+	return getObjectmetaOutput, nil
+}
+
+func updateDownloadFile(filePath string, rangeStart int64, output *GetObjectOutput) error {
+	fd, err := os.OpenFile(filePath, os.O_WRONLY, 0666)
+	if err != nil {
+		doLog(LEVEL_ERROR, "Failed to open file [%s].", filePath)
+		return err
+	}
+	defer func() {
+		errMsg := fd.Close()
+		if errMsg != nil {
+			doLog(LEVEL_WARN, "Failed to close file with error [%v].", errMsg)
+		}
+	}()
+	_, err = fd.Seek(rangeStart, 0)
+	if err != nil {
+		doLog(LEVEL_ERROR, "Failed to seek file with error [%v].", err)
+		return err
+	}
+	fileWriter := bufio.NewWriterSize(fd, 65536)
+	part := make([]byte, 8192)
+	var readErr error
+	var readCount int
+	for {
+		readCount, readErr = output.Body.Read(part)
+		if readCount > 0 {
+			wcnt, werr := fileWriter.Write(part[0:readCount])
+			if werr != nil {
+				doLog(LEVEL_ERROR, "Failed to write to file with error [%v].", werr)
+				return werr
+			}
+			if wcnt != readCount {
+				doLog(LEVEL_ERROR, "Failed to write to file [%s], expect: [%d], actual: [%d]", filePath, readCount, wcnt)
+				return fmt.Errorf("Failed to write to file [%s], expect: [%d], actual: [%d]", filePath, readCount, wcnt)
+			}
+		}
+		if readErr != nil {
+			if readErr != io.EOF {
+				doLog(LEVEL_ERROR, "Failed to read response body with error [%v].", readErr)
+				return readErr
+			}
+			break
+		}
+	}
+	err = fileWriter.Flush()
+	if err != nil {
+		doLog(LEVEL_ERROR, "Failed to flush file with error [%v].", err)
+		return err
+	}
+	return nil
+}
+
+func handleDownloadTaskResult(result interface{}, dfc *DownloadCheckpoint, partNum int64, enableCheckpoint bool, checkpointFile string, lock *sync.Mutex) (err error) {
+	if _, ok := result.(*GetObjectOutput); ok {
+		lock.Lock()
+		defer lock.Unlock()
+		dfc.DownloadParts[partNum-1].IsCompleted = true
+		if enableCheckpoint {
+			_err := updateCheckpointFile(dfc, checkpointFile)
+			if _err != nil {
+				doLog(LEVEL_WARN, "Failed to update checkpoint file with error [%v].", _err)
+			}
+		}
+	} else if result != errAbort {
+		if _err, ok := result.(error); ok {
+			err = _err
+		}
+	}
+	return
+}
+
+func (obsClient ObsClient) downloadFileConcurrent(input *DownloadFileInput, dfc *DownloadCheckpoint, extensions []extensionOptions) error {
+	pool := NewRoutinePool(input.TaskNum, MAX_PART_NUM)
+	var downloadPartError atomic.Value
+	var errFlag int32
+	var abort int32
+	lock := new(sync.Mutex)
+	for _, downloadPart := range dfc.DownloadParts {
+		if atomic.LoadInt32(&abort) == 1 {
+			break
+		}
+		if downloadPart.IsCompleted {
+			continue
+		}
+		task := downloadPartTask{
+			GetObjectInput: GetObjectInput{
+				GetObjectMetadataInput: input.GetObjectMetadataInput,
+				IfMatch:                input.IfMatch,
+				IfNoneMatch:            input.IfNoneMatch,
+				IfUnmodifiedSince:      input.IfUnmodifiedSince,
+				IfModifiedSince:        input.IfModifiedSince,
+				RangeStart:             downloadPart.Offset,
+				RangeEnd:               downloadPart.RangeEnd,
+			},
+			obsClient:        &obsClient,
+			extensions:       extensions,
+			abort:            &abort,
+			partNumber:       downloadPart.PartNumber,
+			tempFileURL:      dfc.TempFileInfo.TempFileUrl,
+			enableCheckpoint: input.EnableCheckpoint,
+		}
+		pool.ExecuteFunc(func() interface{} {
+			result := task.Run()
+			err := handleDownloadTaskResult(result, dfc, task.partNumber, input.EnableCheckpoint, input.CheckpointFile, lock)
+			if err != nil && atomic.CompareAndSwapInt32(&errFlag, 0, 1) {
+				downloadPartError.Store(err)
+			}
+			return nil
+		})
+	}
+	pool.ShutDown()
+	if err, ok := downloadPartError.Load().(error); ok {
+		return err
+	}
+
+	return nil
+}

modules/obs/util.go

@@ -0,0 +1,536 @@
+// Copyright 2019 Huawei Technologies Co.,Ltd.
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License.  You may obtain a copy of the
+// License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations under the License.
+
+//nolint:golint, unused
+package obs
+
+import (
+	"crypto/hmac"
+	"crypto/md5"
+	"crypto/sha1"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"encoding/json"
+	"encoding/xml"
+	"fmt"
+	"net/url"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var regex = regexp.MustCompile("^[\u4e00-\u9fa5]$")
+var ipRegex = regexp.MustCompile("^((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?)$")
+var v4AuthRegex = regexp.MustCompile("Credential=(.+?),SignedHeaders=(.+?),Signature=.+")
+var regionRegex = regexp.MustCompile(".+/\\d+/(.+?)/.+")
+
+// StringContains replaces subStr in src with subTranscoding and returns the new string
+func StringContains(src string, subStr string, subTranscoding string) string {
+	return strings.Replace(src, subStr, subTranscoding, -1)
+}
+
+// XmlTranscoding replaces special characters with their escaped form
+func XmlTranscoding(src string) string {
+	srcTmp := StringContains(src, "&", "&")
+	srcTmp = StringContains(srcTmp, "<", "&lt;")
+	srcTmp = StringContains(srcTmp, ">", "&gt;")
+	srcTmp = StringContains(srcTmp, "'", "&apos;")
+	srcTmp = StringContains(srcTmp, "\"", "&quot;")
+	return srcTmp
+}
+
+// StringToInt converts string value to int value with default value
+func StringToInt(value string, def int) int {
+	ret, err := strconv.Atoi(value)
+	if err != nil {
+		ret = def
+	}
+	return ret
+}
+
+// StringToInt64 converts string value to int64 value with default value
+func StringToInt64(value string, def int64) int64 {
+	ret, err := strconv.ParseInt(value, 10, 64)
+	if err != nil {
+		ret = def
+	}
+	return ret
+}
+
+// IntToString converts int value to string value
+func IntToString(value int) string {
+	return strconv.Itoa(value)
+}
+
+// Int64ToString converts int64 value to string value
+func Int64ToString(value int64) string {
+	return strconv.FormatInt(value, 10)
+}
+
+// GetCurrentTimestamp gets unix time in milliseconds
+func GetCurrentTimestamp() int64 {
+	return time.Now().UnixNano() / 1000000
+}
+
+// FormatUtcNow gets a textual representation of the UTC format time value
+func FormatUtcNow(format string) string {
+	return time.Now().UTC().Format(format)
+}
+
+// FormatUtcToRfc1123 gets a textual representation of the RFC1123 format time value
+func FormatUtcToRfc1123(t time.Time) string {
+	ret := t.UTC().Format(time.RFC1123)
+	return ret[:strings.LastIndex(ret, "UTC")] + "GMT"
+}
+
+// Md5 gets the md5 value of input
+func Md5(value []byte) []byte {
+	m := md5.New()
+	_, err := m.Write(value)
+	if err != nil {
+		doLog(LEVEL_WARN, "MD5 failed to write")
+	}
+	return m.Sum(nil)
+}
+
+// HmacSha1 gets hmac sha1 value of input
+func HmacSha1(key, value []byte) []byte {
+	mac := hmac.New(sha1.New, key)
+	_, err := mac.Write(value)
+	if err != nil {
+		doLog(LEVEL_WARN, "HmacSha1 failed to write")
+	}
+	return mac.Sum(nil)
+}
+
+// HmacSha256 get hmac sha256 value if input
+func HmacSha256(key, value []byte) []byte {
+	mac := hmac.New(sha256.New, key)
+	_, err := mac.Write(value)
+	if err != nil {
+		doLog(LEVEL_WARN, "HmacSha256 failed to write")
+	}
+	return mac.Sum(nil)
+}
+
+// Base64Encode wrapper of base64.StdEncoding.EncodeToString
+func Base64Encode(value []byte) string {
+	return base64.StdEncoding.EncodeToString(value)
+}
+
+// Base64Decode wrapper of base64.StdEncoding.DecodeString
+func Base64Decode(value string) ([]byte, error) {
+	return base64.StdEncoding.DecodeString(value)
+}
+
+// HexMd5 returns the md5 value of input in hexadecimal format
+func HexMd5(value []byte) string {
+	return Hex(Md5(value))
+}
+
+// Base64Md5 returns the md5 value of input with Base64Encode
+func Base64Md5(value []byte) string {
+	return Base64Encode(Md5(value))
+}
+
+// Sha256Hash returns sha256 checksum
+func Sha256Hash(value []byte) []byte {
+	hash := sha256.New()
+	_, err := hash.Write(value)
+	if err != nil {
+		doLog(LEVEL_WARN, "Sha256Hash failed to write")
+	}
+	return hash.Sum(nil)
+}
+
+// ParseXml wrapper of xml.Unmarshal
+func ParseXml(value []byte, result interface{}) error {
+	if len(value) == 0 {
+		return nil
+	}
+	return xml.Unmarshal(value, result)
+}
+
+// parseJSON wrapper of json.Unmarshal
+func parseJSON(value []byte, result interface{}) error {
+	if len(value) == 0 {
+		return nil
+	}
+	return json.Unmarshal(value, result)
+}
+
+// TransToXml wrapper of xml.Marshal
+func TransToXml(value interface{}) ([]byte, error) {
+	if value == nil {
+		return []byte{}, nil
+	}
+	return xml.Marshal(value)
+}
+
+// Hex wrapper of hex.EncodeToString
+func Hex(value []byte) string {
+	return hex.EncodeToString(value)
+}
+
+// HexSha256 returns the Sha256Hash value of input in hexadecimal format
+func HexSha256(value []byte) string {
+	return Hex(Sha256Hash(value))
+}
+
+// UrlDecode wrapper of url.QueryUnescape
+func UrlDecode(value string) (string, error) {
+	ret, err := url.QueryUnescape(value)
+	if err == nil {
+		return ret, nil
+	}
+	return "", err
+}
+
+// UrlDecodeWithoutError wrapper of UrlDecode
+func UrlDecodeWithoutError(value string) string {
+	ret, err := UrlDecode(value)
+	if err == nil {
+		return ret
+	}
+	if isErrorLogEnabled() {
+		doLog(LEVEL_ERROR, "Url decode error")
+	}
+	return ""
+}
+
+// IsIP checks whether the value matches ip address
+func IsIP(value string) bool {
+	return ipRegex.MatchString(value)
+}
+
+// UrlEncode encodes the input value
+func UrlEncode(value string, chineseOnly bool) string {
+	if chineseOnly {
+		values := make([]string, 0, len(value))
+		for _, val := range value {
+			_value := string(val)
+			if regex.MatchString(_value) {
+				_value = url.QueryEscape(_value)
+			}
+			values = append(values, _value)
+		}
+		return strings.Join(values, "")
+	}
+	return url.QueryEscape(value)
+}
+
+func copyHeaders(m map[string][]string) (ret map[string][]string) {
+	if m != nil {
+		ret = make(map[string][]string, len(m))
+		for key, values := range m {
+			_values := make([]string, 0, len(values))
+			for _, value := range values {
+				_values = append(_values, value)
+			}
+			ret[strings.ToLower(key)] = _values
+		}
+	} else {
+		ret = make(map[string][]string)
+	}
+
+	return
+}
+
+func parseHeaders(headers map[string][]string) (signature string, region string, signedHeaders string) {
+	signature = "v2"
+	if receviedAuthorization, ok := headers[strings.ToLower(HEADER_AUTH_CAMEL)]; ok && len(receviedAuthorization) > 0 {
+		if strings.HasPrefix(receviedAuthorization[0], V4_HASH_PREFIX) {
+			signature = "v4"
+			matches := v4AuthRegex.FindStringSubmatch(receviedAuthorization[0])
+			if len(matches) >= 3 {
+				region = matches[1]
+				regions := regionRegex.FindStringSubmatch(region)
+				if len(regions) >= 2 {
+					region = regions[1]
+				}
+				signedHeaders = matches[2]
+			}
+
+		} else if strings.HasPrefix(receviedAuthorization[0], V2_HASH_PREFIX) {
+			signature = "v2"
+		}
+	}
+	return
+}
+
+func getTemporaryKeys() []string {
+	return []string{
+		"Signature",
+		"signature",
+		"X-Amz-Signature",
+		"x-amz-signature",
+	}
+}
+
+func getIsObs(isTemporary bool, querys []string, headers map[string][]string) bool {
+	isObs := true
+	if isTemporary {
+		for _, value := range querys {
+			keyPrefix := strings.ToLower(value)
+			if strings.HasPrefix(keyPrefix, HEADER_PREFIX) {
+				isObs = false
+			} else if strings.HasPrefix(value, HEADER_ACCESSS_KEY_AMZ) {
+				isObs = false
+			}
+		}
+	} else {
+		for key := range headers {
+			keyPrefix := strings.ToLower(key)
+			if strings.HasPrefix(keyPrefix, HEADER_PREFIX) {
+				isObs = false
+				break
+			}
+		}
+	}
+	return isObs
+}
+
+func isPathStyle(headers map[string][]string, bucketName string) bool {
+	if receviedHost, ok := headers[HEADER_HOST]; ok && len(receviedHost) > 0 && !strings.HasPrefix(receviedHost[0], bucketName+".") {
+		return true
+	}
+	return false
+}
+
+// GetV2Authorization v2 Authorization
+func GetV2Authorization(ak, sk, method, bucketName, objectKey, queryURL string, headers map[string][]string) (ret map[string]string) {
+
+	if strings.HasPrefix(queryURL, "?") {
+		queryURL = queryURL[1:]
+	}
+
+	method = strings.ToUpper(method)
+
+	querys := strings.Split(queryURL, "&")
+	querysResult := make([]string, 0)
+	for _, value := range querys {
+		if value != "=" && len(value) != 0 {
+			querysResult = append(querysResult, value)
+		}
+	}
+	params := make(map[string]string)
+
+	for _, value := range querysResult {
+		kv := strings.Split(value, "=")
+		length := len(kv)
+		if length == 1 {
+			key := UrlDecodeWithoutError(kv[0])
+			params[key] = ""
+		} else if length >= 2 {
+			key := UrlDecodeWithoutError(kv[0])
+			vals := make([]string, 0, length-1)
+			for i := 1; i < length; i++ {
+				val := UrlDecodeWithoutError(kv[i])
+				vals = append(vals, val)
+			}
+			params[key] = strings.Join(vals, "=")
+		}
+	}
+	headers = copyHeaders(headers)
+	pathStyle := isPathStyle(headers, bucketName)
+	conf := &config{securityProvider: &securityProvider{ak: ak, sk: sk},
+		urlHolder: &urlHolder{scheme: "https", host: "dummy", port: 443},
+		pathStyle: pathStyle}
+	conf.signature = SignatureObs
+	_, canonicalizedURL := conf.formatUrls(bucketName, objectKey, params, false)
+	ret = v2Auth(ak, sk, method, canonicalizedURL, headers, true)
+	v2HashPrefix := OBS_HASH_PREFIX
+	ret[HEADER_AUTH_CAMEL] = fmt.Sprintf("%s %s:%s", v2HashPrefix, ak, ret["Signature"])
+	return
+}
+
+// GetAuthorization Authorization
+func GetAuthorization(ak, sk, method, bucketName, objectKey, queryURL string, headers map[string][]string) (ret map[string]string) {
+
+	if strings.HasPrefix(queryURL, "?") {
+		queryURL = queryURL[1:]
+	}
+
+	method = strings.ToUpper(method)
+
+	querys := strings.Split(queryURL, "&")
+	querysResult := make([]string, 0)
+	for _, value := range querys {
+		if value != "=" && len(value) != 0 {
+			querysResult = append(querysResult, value)
+		}
+	}
+	params := make(map[string]string)
+
+	for _, value := range querysResult {
+		kv := strings.Split(value, "=")
+		length := len(kv)
+		if length == 1 {
+			key := UrlDecodeWithoutError(kv[0])
+			params[key] = ""
+		} else if length >= 2 {
+			key := UrlDecodeWithoutError(kv[0])
+			vals := make([]string, 0, length-1)
+			for i := 1; i < length; i++ {
+				val := UrlDecodeWithoutError(kv[i])
+				vals = append(vals, val)
+			}
+			params[key] = strings.Join(vals, "=")
+		}
+	}
+	isTemporary := false
+	signature := "v2"
+	temporaryKeys := getTemporaryKeys()
+	for _, key := range temporaryKeys {
+		if _, ok := params[key]; ok {
+			isTemporary = true
+			if strings.ToLower(key) == "signature" {
+				signature = "v2"
+			} else if strings.ToLower(key) == "x-amz-signature" {
+				signature = "v4"
+			}
+			break
+		}
+	}
+	isObs := getIsObs(isTemporary, querysResult, headers)
+	headers = copyHeaders(headers)
+	pathStyle := false
+	if receviedHost, ok := headers[HEADER_HOST]; ok && len(receviedHost) > 0 && !strings.HasPrefix(receviedHost[0], bucketName+".") {
+		pathStyle = true
+	}
+	conf := &config{securityProvider: &securityProvider{ak: ak, sk: sk},
+		urlHolder: &urlHolder{scheme: "https", host: "dummy", port: 443},
+		pathStyle: pathStyle}
+
+	if isTemporary {
+		return getTemporaryAuthorization(ak, sk, method, bucketName, objectKey, signature, conf, params, headers, isObs)
+	}
+	signature, region, signedHeaders := parseHeaders(headers)
+	if signature == "v4" {
+		conf.signature = SignatureV4
+		requestURL, canonicalizedURL := conf.formatUrls(bucketName, objectKey, params, false)
+		parsedRequestURL, _err := url.Parse(requestURL)
+		if _err != nil {
+			doLog(LEVEL_WARN, "Failed to parse requestURL")
+			return nil
+		}
+		headerKeys := strings.Split(signedHeaders, ";")
+		_headers := make(map[string][]string, len(headerKeys))
+		for _, headerKey := range headerKeys {
+			_headers[headerKey] = headers[headerKey]
+		}
+		ret = v4Auth(ak, sk, region, method, canonicalizedURL, parsedRequestURL.RawQuery, _headers)
+		ret[HEADER_AUTH_CAMEL] = fmt.Sprintf("%s Credential=%s,SignedHeaders=%s,Signature=%s", V4_HASH_PREFIX, ret["Credential"], ret["SignedHeaders"], ret["Signature"])
+	} else if signature == "v2" {
+		if isObs {
+			conf.signature = SignatureObs
+		} else {
+			conf.signature = SignatureV2
+		}
+		_, canonicalizedURL := conf.formatUrls(bucketName, objectKey, params, false)
+		ret = v2Auth(ak, sk, method, canonicalizedURL, headers, isObs)
+		v2HashPrefix := V2_HASH_PREFIX
+		if isObs {
+			v2HashPrefix = OBS_HASH_PREFIX
+		}
+		ret[HEADER_AUTH_CAMEL] = fmt.Sprintf("%s %s:%s", v2HashPrefix, ak, ret["Signature"])
+	}
+	return
+
+}
+
+func getTemporaryAuthorization(ak, sk, method, bucketName, objectKey, signature string, conf *config, params map[string]string,
+	headers map[string][]string, isObs bool) (ret map[string]string) {
+
+	if signature == "v4" {
+		conf.signature = SignatureV4
+
+		longDate, ok := params[PARAM_DATE_AMZ_CAMEL]
+		if !ok {
+			longDate = params[HEADER_DATE_AMZ]
+		}
+		shortDate := longDate[:8]
+
+		credential, ok := params[PARAM_CREDENTIAL_AMZ_CAMEL]
+		if !ok {
+			credential = params[strings.ToLower(PARAM_CREDENTIAL_AMZ_CAMEL)]
+		}
+
+		_credential := UrlDecodeWithoutError(credential)
+
+		regions := regionRegex.FindStringSubmatch(_credential)
+		var region string
+		if len(regions) >= 2 {
+			region = regions[1]
+		}
+
+		_, scope := getCredential(ak, region, shortDate)
+
+		expires, ok := params[PARAM_EXPIRES_AMZ_CAMEL]
+		if !ok {
+			expires = params[strings.ToLower(PARAM_EXPIRES_AMZ_CAMEL)]
+		}
+
+		signedHeaders, ok := params[PARAM_SIGNEDHEADERS_AMZ_CAMEL]
+		if !ok {
+			signedHeaders = params[strings.ToLower(PARAM_SIGNEDHEADERS_AMZ_CAMEL)]
+		}
+
+		algorithm, ok := params[PARAM_ALGORITHM_AMZ_CAMEL]
+		if !ok {
+			algorithm = params[strings.ToLower(PARAM_ALGORITHM_AMZ_CAMEL)]
+		}
+
+		if _, ok := params[PARAM_SIGNATURE_AMZ_CAMEL]; ok {
+			delete(params, PARAM_SIGNATURE_AMZ_CAMEL)
+		} else if _, ok := params[strings.ToLower(PARAM_SIGNATURE_AMZ_CAMEL)]; ok {
+			delete(params, strings.ToLower(PARAM_SIGNATURE_AMZ_CAMEL))
+		}
+
+		ret = make(map[string]string, 6)
+		ret[PARAM_ALGORITHM_AMZ_CAMEL] = algorithm
+		ret[PARAM_CREDENTIAL_AMZ_CAMEL] = credential
+		ret[PARAM_DATE_AMZ_CAMEL] = longDate
+		ret[PARAM_EXPIRES_AMZ_CAMEL] = expires
+		ret[PARAM_SIGNEDHEADERS_AMZ_CAMEL] = signedHeaders
+
+		requestURL, canonicalizedURL := conf.formatUrls(bucketName, objectKey, params, false)
+		parsedRequestURL, _err := url.Parse(requestURL)
+		if _err != nil {
+			doLog(LEVEL_WARN, "Failed to parse requestUrl")
+			return nil
+		}
+		stringToSign := getV4StringToSign(method, canonicalizedURL, parsedRequestURL.RawQuery, scope, longDate, UNSIGNED_PAYLOAD, strings.Split(signedHeaders, ";"), headers)
+		ret[PARAM_SIGNATURE_AMZ_CAMEL] = UrlEncode(getSignature(stringToSign, sk, region, shortDate), false)
+	} else if signature == "v2" {
+		if isObs {
+			conf.signature = SignatureObs
+		} else {
+			conf.signature = SignatureV2
+		}
+		_, canonicalizedURL := conf.formatUrls(bucketName, objectKey, params, false)
+		expires, ok := params["Expires"]
+		if !ok {
+			expires = params["expires"]
+		}
+		headers[HEADER_DATE_CAMEL] = []string{expires}
+		stringToSign := getV2StringToSign(method, canonicalizedURL, headers, isObs)
+		ret = make(map[string]string, 3)
+		ret["Signature"] = UrlEncode(Base64Encode(HmacSha1([]byte(sk), []byte(stringToSign))), false)
+		ret["AWSAccessKeyId"] = UrlEncode(ak, false)
+		ret["Expires"] = UrlEncode(expires, false)
+	}
+
+	return
+}