diff --git a/weed/s3api/s3api_errors.go b/weed/s3api/s3api_errors.go
index 3f97c73cb..ff411f276 100644
--- a/weed/s3api/s3api_errors.go
+++ b/weed/s3api/s3api_errors.go
@@ -33,6 +33,7 @@ const (
 	ErrBucketAlreadyExists
 	ErrBucketAlreadyOwnedByYou
 	ErrNoSuchBucket
+	ErrNoSuchKey
 	ErrNoSuchUpload
 	ErrInvalidBucketName
 	ErrInvalidDigest
@@ -134,6 +135,11 @@ var errorCodeResponse = map[ErrorCode]APIError{
 		Description:    "The specified bucket does not exist",
 		HTTPStatusCode: http.StatusNotFound,
 	},
+	ErrNoSuchKey: {
+		Code:           "NoSuchKey",
+		Description:    "The specified key does not exist.",
+		HTTPStatusCode: http.StatusNotFound,
+	},
 	ErrNoSuchUpload: {
 		Code:           "NoSuchUpload",
 		Description:    "The specified multipart upload does not exist. The upload ID may be invalid, or the upload may have been aborted or completed.",
diff --git a/weed/s3api/s3api_handlers.go b/weed/s3api/s3api_handlers.go
index 45a7cbc2e..7ef676400 100644
--- a/weed/s3api/s3api_handlers.go
+++ b/weed/s3api/s3api_handlers.go
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"net/http"
 	"net/url"
+	"strconv"
 	"time"
 
 	"google.golang.org/grpc"
@@ -76,13 +77,19 @@ func getRESTErrorResponse(err APIError, resource string) RESTErrorResponse {
 
 func writeResponse(w http.ResponseWriter, statusCode int, response []byte, mType mimeType) {
 	setCommonHeaders(w)
+	if response != nil {
+		w.Header().Set("Content-Length", strconv.Itoa(len(response)))
+	}
 	if mType != mimeNone {
 		w.Header().Set("Content-Type", string(mType))
 	}
 	w.WriteHeader(statusCode)
 	if response != nil {
 		glog.V(4).Infof("status %d %s: %s", statusCode, mType, string(response))
-		w.Write(response)
+		_, err := w.Write(response)
+		if err != nil {
+			glog.V(0).Infof("write err: %v", err)
+		}
 		w.(http.Flusher).Flush()
 	}
 }
diff --git a/weed/s3api/s3api_object_handlers.go b/weed/s3api/s3api_object_handlers.go
index 300441ef2..87c3ce705 100644
--- a/weed/s3api/s3api_object_handlers.go
+++ b/weed/s3api/s3api_object_handlers.go
@@ -14,7 +14,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
-	"github.com/chrislusf/seaweedfs/weed/server"
+	weed_server "github.com/chrislusf/seaweedfs/weed/server"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
@@ -108,8 +108,8 @@ func (s3a *S3ApiServer) DeleteObjectHandler(w http.ResponseWriter, r *http.Reque
 	destUrl := fmt.Sprintf("http://%s%s/%s%s",
 		s3a.option.Filer, s3a.option.BucketsPath, bucket, object)
 
-	s3a.proxyToFiler(w, r, destUrl, func(proxyResonse *http.Response, w http.ResponseWriter) {
-		for k, v := range proxyResonse.Header {
+	s3a.proxyToFiler(w, r, destUrl, func(proxyResponse *http.Response, w http.ResponseWriter) {
+		for k, v := range proxyResponse.Header {
 			w.Header()[k] = v
 		}
 		w.WriteHeader(http.StatusNoContent)