working S3 multipart uploads

other/java/s3copy/copier/src/main/java/com/seaweedfs/s3/HighLevelMultipartUpload.java

@@ -0,0 +1,63 @@
+package com.seaweedfs.s3;
+
+import com.amazonaws.AmazonServiceException;
+import com.amazonaws.ClientConfiguration;
+import com.amazonaws.SdkClientException;
+import com.amazonaws.auth.AWSCredentials;
+import com.amazonaws.auth.AWSStaticCredentialsProvider;
+import com.amazonaws.auth.BasicAWSCredentials;
+import com.amazonaws.client.builder.AwsClientBuilder;
+import com.amazonaws.regions.Regions;
+import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.AmazonS3ClientBuilder;
+import com.amazonaws.services.s3.transfer.TransferManager;
+import com.amazonaws.services.s3.transfer.TransferManagerBuilder;
+import com.amazonaws.services.s3.transfer.Upload;
+
+import java.io.File;
+
+public class HighLevelMultipartUpload {
+
+    public static void main(String[] args) throws Exception {
+        String bucketName = "javabucket";
+        String filePath = args[0];
+        File file = new File(filePath);
+        String keyName = "path/to/" + file.getName();
+
+        try {
+            AWSCredentials credentials = new BasicAWSCredentials("ANY-ACCESSKEYID", "ANY-SECRETACCESSKEY");
+            ClientConfiguration clientConfiguration = new ClientConfiguration();
+            clientConfiguration.setSignerOverride("AWSS3V4SignerType");
+
+            AmazonS3 s3Client = AmazonS3ClientBuilder
+                .standard()
+                .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(
+                    "http://localhost:8333", Regions.US_WEST_1.name()))
+                .withPathStyleAccessEnabled(true)
+                .withClientConfiguration(clientConfiguration)
+                .withCredentials(new AWSStaticCredentialsProvider(credentials))
+                .build();
+
+            TransferManager tm = TransferManagerBuilder.standard()
+                .withS3Client(s3Client)
+                .build();
+
+            // TransferManager processes all transfers asynchronously,
+            // so this call returns immediately.
+            Upload upload = tm.upload(bucketName, keyName, file);
+            System.out.println("Object upload started");
+
+            // Optionally, wait for the upload to finish before continuing.
+            upload.waitForCompletion();
+            System.out.println("Object upload complete");
+        } catch (AmazonServiceException e) {
+            // The call was transmitted successfully, but Amazon S3 couldn't process
+            // it, so it returned an error response.
+            e.printStackTrace();
+        } catch (SdkClientException e) {
+            // Amazon S3 couldn't be contacted for a response, or the client
+            // couldn't parse the response from Amazon S3.
+            e.printStackTrace();
+        }
+    }
+}

other/java/s3copy/copier/src/main/java/com/seaweedfs/s3/PutObject.java

@@ -18,7 +18,7 @@ import java.io.File;
 /**
  * Hello world!
  */
-public class S3Copy {
+public class PutObject {
     public static void main(String[] args) {
 
         AWSCredentials credentials = new BasicAWSCredentials("ANY-ACCESSKEYID", "ANY-SECRETACCESSKEY");

other/java/s3copy/copier/src/test/java/com/seaweedfs/s3/PutObjectTest.java

@@ -7,7 +7,7 @@ import junit.framework.TestSuite;
 /**
  * Unit test for simple App.
  */
-public class S3CopyTest
+public class PutObjectTest
     extends TestCase
 {
     /**
@@ -15,7 +15,7 @@ public class S3CopyTest
      *
      * @param testName name of the test case
      */
-    public S3CopyTest(String testName )
+    public PutObjectTest(String testName )
     {
         super( testName );
     }
@@ -25,7 +25,7 @@ public class S3CopyTest
      */
     public static Test suite()
     {
-        return new TestSuite( S3CopyTest.class );
+        return new TestSuite( PutObjectTest.class );
     }
 
     /**

weed/s3api/filer_multipart.go

@@ -15,7 +15,11 @@ import (
 	"github.com/satori/go.uuid"
 )
 
-func (s3a *S3ApiServer) createMultipartUpload(input *s3.CreateMultipartUploadInput) (output *s3.CreateMultipartUploadOutput, code ErrorCode) {
+type InitiateMultipartUploadResult struct {
+	s3.CreateMultipartUploadOutput
+}
+
+func (s3a *S3ApiServer) createMultipartUpload(input *s3.CreateMultipartUploadInput) (output *InitiateMultipartUploadResult, code ErrorCode) {
 	uploadId, _ := uuid.NewV4()
 	uploadIdString := uploadId.String()
 
@@ -29,16 +33,22 @@ func (s3a *S3ApiServer) createMultipartUpload(input *s3.CreateMultipartUploadInp
 		return nil, ErrInternalError
 	}
 
-	output = &s3.CreateMultipartUploadOutput{
+	output = &InitiateMultipartUploadResult{
-		Bucket:   input.Bucket,
+		s3.CreateMultipartUploadOutput{
-		Key:      input.Key,
+			Bucket:   input.Bucket,
-		UploadId: aws.String(uploadIdString),
+			Key:      input.Key,
+			UploadId: aws.String(uploadIdString),
+		},
 	}
 
 	return
 }
 
-func (s3a *S3ApiServer) completeMultipartUpload(input *s3.CompleteMultipartUploadInput) (output *s3.CompleteMultipartUploadOutput, code ErrorCode) {
+type CompleteMultipartUploadResult struct {
+	s3.CompleteMultipartUploadOutput
+}
+
+func (s3a *S3ApiServer) completeMultipartUpload(input *s3.CompleteMultipartUploadInput) (output *CompleteMultipartUploadResult, code ErrorCode) {
 
 	uploadDirectory := s3a.genUploadsFolder(*input.Bucket) + "/" + *input.UploadId
 
@@ -54,13 +64,14 @@ func (s3a *S3ApiServer) completeMultipartUpload(input *s3.CompleteMultipartUploa
 	for _, entry := range entries {
 		if strings.HasSuffix(entry.Name, ".part") && !entry.IsDirectory {
 			for _, chunk := range entry.Chunks {
-				finalParts = append(finalParts, &filer_pb.FileChunk{
+				p := &filer_pb.FileChunk{
 					FileId: chunk.FileId,
 					Offset: offset,
 					Size:   chunk.Size,
 					Mtime:  chunk.Mtime,
 					ETag:   chunk.ETag,
-				})
+				}
+				finalParts = append(finalParts, p)
 				offset += int64(chunk.Size)
 			}
 		}
@@ -71,6 +82,9 @@ func (s3a *S3ApiServer) completeMultipartUpload(input *s3.CompleteMultipartUploa
 	if dirName == "." {
 		dirName = ""
 	}
+	if strings.HasPrefix(dirName, "/") {
+		dirName = dirName[1:]
+	}
 	dirName = fmt.Sprintf("%s/%s/%s", s3a.option.BucketsPath, *input.Bucket, dirName)
 
 	err = s3a.mkFile(dirName, entryName, finalParts)
@@ -80,10 +94,12 @@ func (s3a *S3ApiServer) completeMultipartUpload(input *s3.CompleteMultipartUploa
 		return nil, ErrInternalError
 	}
 
-	output = &s3.CompleteMultipartUploadOutput{
+	output = &CompleteMultipartUploadResult{
-		Bucket: input.Bucket,
+		s3.CompleteMultipartUploadOutput{
-		ETag:   aws.String("\"" + filer2.ETag(finalParts) + "\""),
+			Bucket: input.Bucket,
-		Key:    input.Key,
+			ETag:   aws.String("\"" + filer2.ETag(finalParts) + "\""),
+			Key:    input.Key,
+		},
 	}
 
 	return
@@ -107,15 +123,21 @@ func (s3a *S3ApiServer) abortMultipartUpload(input *s3.AbortMultipartUploadInput
 	return &s3.AbortMultipartUploadOutput{}, ErrNone
 }
 
-func (s3a *S3ApiServer) listMultipartUploads(input *s3.ListMultipartUploadsInput) (output *s3.ListMultipartUploadsOutput, code ErrorCode) {
+type ListMultipartUploadsResult struct {
+	s3.ListMultipartUploadsOutput
+}
 
-	output = &s3.ListMultipartUploadsOutput{
+func (s3a *S3ApiServer) listMultipartUploads(input *s3.ListMultipartUploadsInput) (output *ListMultipartUploadsResult, code ErrorCode) {
-		Bucket:       input.Bucket,
+
-		Delimiter:    input.Delimiter,
+	output = &ListMultipartUploadsResult{
-		EncodingType: input.EncodingType,
+		s3.ListMultipartUploadsOutput{
-		KeyMarker:    input.KeyMarker,
+			Bucket:       input.Bucket,
-		MaxUploads:   input.MaxUploads,
+			Delimiter:    input.Delimiter,
-		Prefix:       input.Prefix,
+			EncodingType: input.EncodingType,
+			KeyMarker:    input.KeyMarker,
+			MaxUploads:   input.MaxUploads,
+			Prefix:       input.Prefix,
+		},
 	}
 
 	entries, err := s3a.list(s3a.genUploadsFolder(*input.Bucket), *input.Prefix, *input.KeyMarker, true, int(*input.MaxUploads))
@@ -136,13 +158,19 @@ func (s3a *S3ApiServer) listMultipartUploads(input *s3.ListMultipartUploadsInput
 	return
 }
 
-func (s3a *S3ApiServer) listObjectParts(input *s3.ListPartsInput) (output *s3.ListPartsOutput, code ErrorCode) {
+type ListPartsResult struct {
-	output = &s3.ListPartsOutput{
+	s3.ListPartsOutput
-		Bucket:           input.Bucket,
+}
-		Key:              input.Key,
+
-		UploadId:         input.UploadId,
+func (s3a *S3ApiServer) listObjectParts(input *s3.ListPartsInput) (output *ListPartsResult, code ErrorCode) {
-		MaxParts:         input.MaxParts,         // the maximum number of parts to return.
+	output = &ListPartsResult{
-		PartNumberMarker: input.PartNumberMarker, // the part number starts after this, exclusive
+		s3.ListPartsOutput{
+			Bucket:           input.Bucket,
+			Key:              input.Key,
+			UploadId:         input.UploadId,
+			MaxParts:         input.MaxParts,         // the maximum number of parts to return.
+			PartNumberMarker: input.PartNumberMarker, // the part number starts after this, exclusive
+		},
 	}
 
 	entries, err := s3a.list(s3a.genUploadsFolder(*input.Bucket)+"/"+*input.UploadId,

weed/s3api/filer_util.go

@@ -78,7 +78,7 @@ func (s3a *S3ApiServer) list(parentDirectoryPath, prefix, startFrom string, incl
 	err = s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		request := &filer_pb.ListEntriesRequest{
-			Directory:          s3a.option.BucketsPath,
+			Directory:          parentDirectoryPath,
 			Prefix:             prefix,
 			StartFromFileName:  startFrom,
 			InclusiveStartFrom: inclusive,
@@ -135,7 +135,7 @@ func (s3a *S3ApiServer) exists(parentDirectoryPath string, entryName string, isD
 			Name:      entryName,
 		}
 
-		glog.V(1).Infof("exists entry %v/%v: %v", parentDirectoryPath, entryName, request)
+		glog.V(4).Infof("exists entry %v/%v: %v", parentDirectoryPath, entryName, request)
 		resp, err := client.LookupDirectoryEntry(ctx, request)
 		if err != nil {
 			return fmt.Errorf("exists entry %s/%s: %v", parentDirectoryPath, entryName, err)

weed/s3api/s3api_errors.go

@@ -40,9 +40,7 @@ const (
 	ErrInvalidMaxParts
 	ErrInvalidPartNumberMarker
 	ErrInvalidPart
-	ErrInvalidPartOrder
 	ErrInternalError
-	ErrMalformedXML
 	ErrNotImplemented
 )
 
@@ -114,21 +112,12 @@ var errorCodeResponse = map[ErrorCode]APIError{
 		Description:    "We encountered an internal error, please try again.",
 		HTTPStatusCode: http.StatusInternalServerError,
 	},
-	ErrMalformedXML: {
+
-		Code:           "MalformedXML",
-		Description:    "The XML you provided was not well-formed or did not validate against our published schema.",
-		HTTPStatusCode: http.StatusBadRequest,
-	},
 	ErrInvalidPart: {
 		Code:           "InvalidPart",
 		Description:    "One or more of the specified parts could not be found.  The part may not have been uploaded, or the specified entity tag may not match the part's entity tag.",
 		HTTPStatusCode: http.StatusBadRequest,
 	},
-	ErrInvalidPartOrder: {
-		Code:           "InvalidPartOrder",
-		Description:    "The list of parts was not in ascending order. The parts list must be specified in order by part number.",
-		HTTPStatusCode: http.StatusBadRequest,
-	},
 	ErrNotImplemented: {
 		Code:           "NotImplemented",
 		Description:    "A header you provided implies functionality that is not implemented",

weed/s3api/s3api_object_handlers.go

@@ -3,12 +3,15 @@ package s3api
 import (
 	"encoding/json"
 	"fmt"
-	"github.com/chrislusf/seaweedfs/weed/glog"
-	"github.com/gorilla/mux"
 	"io"
 	"io/ioutil"
 	"net/http"
 	"strings"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/gorilla/mux"
+	"github.com/chrislusf/seaweedfs/weed/server"
+	"crypto/md5"
 )
 
 var (
@@ -21,19 +24,13 @@ func init() {
 	}}
 }
 
-type UploadResult struct {
-	Name  string `json:"name,omitempty"`
-	Size  uint32 `json:"size,omitempty"`
-	Error string `json:"error,omitempty"`
-}
-
 func (s3a *S3ApiServer) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
 
 	// http://docs.aws.amazon.com/AmazonS3/latest/dev/UploadingObjects.html
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
-	object := vars["object"]
+	object := getObject(vars)
 
 	_, err := validateContentMd5(r.Header)
 	if err != nil {
@@ -47,7 +44,7 @@ func (s3a *S3ApiServer) PutObjectHandler(w http.ResponseWriter, r *http.Request)
 		dataReader = newSignV4ChunkedReader(r)
 	}
 
-	uploadUrl := fmt.Sprintf("http://%s%s/%s/%s?collection=%s",
+	uploadUrl := fmt.Sprintf("http://%s%s/%s%s?collection=%s",
 		s3a.option.Filer, s3a.option.BucketsPath, bucket, object, bucket)
 
 	etag, errCode := s3a.putToFiler(r, uploadUrl, dataReader)
@@ -147,7 +144,10 @@ func passThroghResponse(proxyResonse *http.Response, w http.ResponseWriter) {
 
 func (s3a *S3ApiServer) putToFiler(r *http.Request, uploadUrl string, dataReader io.ReadCloser) (etag string, code ErrorCode) {
 
-	proxyReq, err := http.NewRequest("PUT", uploadUrl, dataReader)
+	hash := md5.New()
+	var body io.Reader = io.TeeReader(dataReader, hash)
+
+	proxyReq, err := http.NewRequest("PUT", uploadUrl, body)
 
 	if err != nil {
 		glog.Errorf("NewRequest %s: %v", uploadUrl, err)
@@ -165,28 +165,30 @@ func (s3a *S3ApiServer) putToFiler(r *http.Request, uploadUrl string, dataReader
 
 	resp, postErr := client.Do(proxyReq)
 
+	dataReader.Close()
+
 	if postErr != nil {
 		glog.Errorf("post to filer: %v", postErr)
 		return "", ErrInternalError
 	}
 	defer resp.Body.Close()
 
-	etag = resp.Header.Get("ETag")
+	etag = fmt.Sprintf("%x", hash.Sum(nil))
 
 	resp_body, ra_err := ioutil.ReadAll(resp.Body)
 	if ra_err != nil {
 		glog.Errorf("upload to filer response read: %v", ra_err)
 		return etag, ErrInternalError
 	}
-	var ret UploadResult
+	var ret weed_server.FilerPostResult
 	unmarshal_err := json.Unmarshal(resp_body, &ret)
 	if unmarshal_err != nil {
 		glog.Errorf("failing to read upload to %s : %v", uploadUrl, string(resp_body))
-		return etag, ErrInternalError
+		return "", ErrInternalError
 	}
 	if ret.Error != "" {
 		glog.Errorf("upload to filer error: %v", ret.Error)
-		return etag, ErrInternalError
+		return "", ErrInternalError
 	}
 
 	return etag, ErrNone
@@ -194,6 +196,26 @@ func (s3a *S3ApiServer) putToFiler(r *http.Request, uploadUrl string, dataReader
 
 func setEtag(w http.ResponseWriter, etag string) {
 	if etag != "" {
-		w.Header().Set("ETag", "\""+etag+"\"")
+		if strings.HasPrefix(etag, "\"") {
+			w.Header().Set("ETag", etag)
+		} else {
+			w.Header().Set("ETag", "\""+etag+"\"")
+		}
 	}
 }
+
+func getObject(vars map[string]string) string {
+	object := vars["object"]
+	if !strings.HasPrefix(object, "/") {
+		object = "/" + object
+	}
+	return object
+}
+
+func getEtag(r *http.Request) (etag string) {
+	etag = r.Header.Get("ETag")
+	if strings.HasPrefix(etag, "\"") && strings.HasSuffix(etag, "\"") {
+		etag = etag[1 : len(etag)-1]
+	}
+	return
+}

weed/s3api/s3api_object_multipart_handlers.go

@@ -1,15 +1,12 @@
 package s3api
 
 import (
-	"encoding/xml"
 	"fmt"
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/s3"
 	"github.com/gorilla/mux"
-	"io/ioutil"
 	"net/http"
 	"net/url"
-	"sort"
 	"strconv"
 	"strings"
 )
@@ -38,6 +35,8 @@ func (s3a *S3ApiServer) NewMultipartUploadHandler(w http.ResponseWriter, r *http
 		return
 	}
 
+	// println("NewMultipartUploadHandler", string(encodeResponse(response)))
+
 	writeSuccessResponseXML(w, encodeResponse(response))
 
 }
@@ -46,37 +45,19 @@ func (s3a *S3ApiServer) NewMultipartUploadHandler(w http.ResponseWriter, r *http
 func (s3a *S3ApiServer) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
-	object := vars["object"]
+	object := getObject(vars)
 
 	// Get upload id.
 	uploadID, _, _, _ := getObjectResources(r.URL.Query())
 
-	completeMultipartBytes, err := ioutil.ReadAll(r.Body)
-	if err != nil {
-		writeErrorResponse(w, ErrInternalError, r.URL)
-		return
-	}
-	completedMultipartUpload := &s3.CompletedMultipartUpload{}
-	if err = xml.Unmarshal(completeMultipartBytes, completedMultipartUpload); err != nil {
-		writeErrorResponse(w, ErrMalformedXML, r.URL)
-		return
-	}
-	if len(completedMultipartUpload.Parts) == 0 {
-		writeErrorResponse(w, ErrMalformedXML, r.URL)
-		return
-	}
-	if !sort.IsSorted(byCompletedPartNumber(completedMultipartUpload.Parts)) {
-		writeErrorResponse(w, ErrInvalidPartOrder, r.URL)
-		return
-	}
-
 	response, errCode := s3a.completeMultipartUpload(&s3.CompleteMultipartUploadInput{
-		Bucket:          aws.String(bucket),
+		Bucket:   aws.String(bucket),
-		Key:             aws.String(object),
+		Key:      aws.String(object),
-		MultipartUpload: completedMultipartUpload,
+		UploadId: aws.String(uploadID),
-		UploadId:        aws.String(uploadID),
 	})
 
+	// println("CompleteMultipartUploadHandler", string(encodeResponse(response)), errCode)
+
 	if errCode != ErrNone {
 		writeErrorResponse(w, errCode, r.URL)
 		return
@@ -90,7 +71,7 @@ func (s3a *S3ApiServer) CompleteMultipartUploadHandler(w http.ResponseWriter, r
 func (s3a *S3ApiServer) AbortMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
-	object := vars["object"]
+	object := getObject(vars)
 
 	// Get upload id.
 	uploadID, _, _, _ := getObjectResources(r.URL.Query())
@@ -106,6 +87,8 @@ func (s3a *S3ApiServer) AbortMultipartUploadHandler(w http.ResponseWriter, r *ht
 		return
 	}
 
+	// println("AbortMultipartUploadHandler", string(encodeResponse(response)))
+
 	writeSuccessResponseXML(w, encodeResponse(response))
 
 }
@@ -144,6 +127,7 @@ func (s3a *S3ApiServer) ListMultipartUploadsHandler(w http.ResponseWriter, r *ht
 	}
 
 	// TODO handle encodingType
+	// println("ListMultipartUploadsHandler", string(encodeResponse(response)))
 
 	writeSuccessResponseXML(w, encodeResponse(response))
 }
@@ -152,7 +136,7 @@ func (s3a *S3ApiServer) ListMultipartUploadsHandler(w http.ResponseWriter, r *ht
 func (s3a *S3ApiServer) ListObjectPartsHandler(w http.ResponseWriter, r *http.Request) {
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
-	object := vars["object"]
+	object := getObject(vars)
 
 	uploadID, partNumberMarker, maxParts, _ := getObjectResources(r.URL.Query())
 	if partNumberMarker < 0 {
@@ -177,6 +161,8 @@ func (s3a *S3ApiServer) ListObjectPartsHandler(w http.ResponseWriter, r *http.Re
 		return
 	}
 
+	// println("ListObjectPartsHandler", string(encodeResponse(response)))
+
 	writeSuccessResponseXML(w, encodeResponse(response))
 
 }

weed/s3api/s3api_server.go

@@ -43,11 +43,6 @@ func (s3a *S3ApiServer) registerRouter(router *mux.Router) {
 
 	for _, bucket := range routers {
 
-		// PutObject
-		bucket.Methods("PUT").Path("/{object:.+}").HandlerFunc(s3a.PutObjectHandler)
-		// PutBucket
-		bucket.Methods("PUT").HandlerFunc(s3a.PutBucketHandler)
-
 		// HeadObject
 		bucket.Methods("HEAD").Path("/{object:.+}").HandlerFunc(s3a.HeadObjectHandler)
 		// HeadBucket
@@ -66,6 +61,11 @@ func (s3a *S3ApiServer) registerRouter(router *mux.Router) {
 		// ListMultipartUploads
 		bucket.Methods("GET").HandlerFunc(s3a.ListMultipartUploadsHandler).Queries("uploads", "")
 
+		// PutObject
+		bucket.Methods("PUT").Path("/{object:.+}").HandlerFunc(s3a.PutObjectHandler)
+		// PutBucket
+		bucket.Methods("PUT").HandlerFunc(s3a.PutBucketHandler)
+
 		// DeleteObject
 		bucket.Methods("DELETE").Path("/{object:.+}").HandlerFunc(s3a.DeleteObjectHandler)
 		// DeleteBucket

weed/server/filer_server_handlers_write.go

@@ -117,7 +117,7 @@ func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	glog.V(0).Infof("request header %+v, urlLocation: %v", r.Header, urlLocation)
+	glog.V(4).Infof("write %s to %v", r.URL.Path, urlLocation)
 
 	u, _ := url.Parse(urlLocation)
 
@@ -221,6 +221,7 @@ func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 		Fid:   fileId,
 		Url:   urlLocation,
 	}
+	setEtag(w, etag)
 	writeJsonQuiet(w, r, http.StatusCreated, reply)
 }
 

weed/server/volume_server_handlers_write.go

@@ -4,13 +4,14 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
+	"strconv"
+	"time"
+	"strings"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/storage"
 	"github.com/chrislusf/seaweedfs/weed/topology"
-	"strconv"
-	"time"
 )
 
 func (vs *VolumeServer) PostHandler(w http.ResponseWriter, r *http.Request) {
@@ -175,6 +176,10 @@ func (vs *VolumeServer) batchDeleteHandler(w http.ResponseWriter, r *http.Reques
 
 func setEtag(w http.ResponseWriter, etag string) {
 	if etag != "" {
-		w.Header().Set("ETag", "\""+etag+"\"")
+		if strings.HasPrefix(etag, "\"") {
+			w.Header().Set("ETag", etag)
+		} else {
+			w.Header().Set("ETag", "\""+etag+"\"")
+		}
 	}
 }