Merge pull request 'no cache when download' (#1502) from fix-1497 into V20220228

Reviewed-on: https://git.openi.org.cn/OpenI/aiforge/pulls/1502
Reviewed-by: ychao_1983 <ychao_1983@sina.com>

routers/repo/download.go

@@ -28,7 +28,8 @@ func ServeData(ctx *context.Context, name string, reader io.Reader) error {
 		buf = buf[:n]
 	}
 
-	ctx.Resp.Header().Set("Cache-Control", "public,max-age=86400")
+	//ctx.Resp.Header().Set("Cache-Control", "public,max-age=86400")
+	ctx.Resp.Header().Set("Cache-Control", "max-age=0")
 	name = path.Base(name)
 
 	// Google Chrome dislike commas in filenames, so let's change it to a space