HEAD shouldn't have any body, handle it in writeErrorResponse()

Makefile

@@ -9,7 +9,7 @@ checkgopath:
 	@for mcpath in $(echo ${GOPATH} | sed 's/:/\n/g' | grep -v Godeps); do if [ ! -d ${mcpath}/src/github.com/minio/minio ]; then echo "Project not found in ${mcpath}, please follow instructions provided at https://github.com/minio/minio/blob/master/CONTRIBUTING.md#setup-your-minio-github-repository" && exit 1; fi done
 
 getdeps: checkdeps checkgopath
-	@go get github.com/minio/godep && echo "Installed godep:"
+	@go get github.com/tools/godep && echo "Installed godep:"
 	@go get github.com/golang/lint/golint && echo "Installed golint:"
 	@go get golang.org/x/tools/cmd/vet && echo "Installed vet:"
 	@go get github.com/fzipp/gocyclo && echo "Installed gocyclo:"

pkg/server/api/bucket-handlers.go

@@ -405,17 +405,13 @@ func (api Minio) HeadBucketHandler(w http.ResponseWriter, req *http.Request) {
 	case nil:
 		writeSuccessResponse(w, acceptsContentType)
 	case donut.SignatureDoesNotMatch:
-		error := getErrorCode(SignatureDoesNotMatch)
+		writeErrorResponse(w, req, SignatureDoesNotMatch, acceptsContentType, req.URL.Path)
-		w.WriteHeader(error.HTTPStatusCode)
 	case donut.BucketNotFound:
-		error := getErrorCode(NoSuchBucket)
+		writeErrorResponse(w, req, NoSuchBucket, acceptsContentType, req.URL.Path)
-		w.WriteHeader(error.HTTPStatusCode)
 	case donut.BucketNameInvalid:
-		error := getErrorCode(InvalidBucketName)
+		writeErrorResponse(w, req, InvalidBucketName, acceptsContentType, req.URL.Path)
-		w.WriteHeader(error.HTTPStatusCode)
 	default:
 		log.Error.Println(iodine.New(err, nil))
-		error := getErrorCode(InternalError)
+		writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
-		w.WriteHeader(error.HTTPStatusCode)
 	}
 }

pkg/server/api/generic-handlers.go

@@ -162,12 +162,7 @@ func IgnoreResourcesHandler(h http.Handler) http.Handler {
 func (h resourceHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	acceptsContentType := getContentType(r)
 	if ignoreNotImplementedObjectResources(r) || ignoreNotImplementedBucketResources(r) {
-		error := getErrorCode(NotImplemented)
+		writeErrorResponse(w, r, NotImplemented, acceptsContentType, r.URL.Path)
-		errorResponse := getErrorResponse(error, "")
-		encodeErrorResponse := encodeErrorResponse(errorResponse, acceptsContentType)
-		setCommonHeaders(w, getContentTypeString(acceptsContentType), len(encodeErrorResponse))
-		w.WriteHeader(error.HTTPStatusCode)
-		w.Write(encodeErrorResponse)
 		return
 	}
 	h.handler.ServeHTTP(w, r)

pkg/server/api/object-handlers.go

@@ -147,30 +147,18 @@ func (api Minio) HeadObjectHandler(w http.ResponseWriter, req *http.Request) {
 		setObjectHeaders(w, metadata)
 		w.WriteHeader(http.StatusOK)
 	case donut.SignatureDoesNotMatch:
-		error := getErrorCode(SignatureDoesNotMatch)
+		writeErrorResponse(w, req, SignatureDoesNotMatch, acceptsContentType, req.URL.Path)
-		w.Header().Set("Server", "Minio")
-		w.WriteHeader(error.HTTPStatusCode)
 	case donut.BucketNameInvalid:
-		error := getErrorCode(InvalidBucketName)
+		writeErrorResponse(w, req, InvalidBucketName, acceptsContentType, req.URL.Path)
-		w.Header().Set("Server", "Minio")
-		w.WriteHeader(error.HTTPStatusCode)
 	case donut.BucketNotFound:
-		error := getErrorCode(NoSuchBucket)
+		writeErrorResponse(w, req, NoSuchBucket, acceptsContentType, req.URL.Path)
-		w.Header().Set("Server", "Minio")
-		w.WriteHeader(error.HTTPStatusCode)
 	case donut.ObjectNotFound:
-		error := getErrorCode(NoSuchKey)
+		writeErrorResponse(w, req, NoSuchKey, acceptsContentType, req.URL.Path)
-		w.Header().Set("Server", "Minio")
-		w.WriteHeader(error.HTTPStatusCode)
 	case donut.ObjectNameInvalid:
-		error := getErrorCode(NoSuchKey)
+		writeErrorResponse(w, req, NoSuchKey, acceptsContentType, req.URL.Path)
-		w.Header().Set("Server", "Minio")
-		w.WriteHeader(error.HTTPStatusCode)
 	default:
 		log.Error.Println(iodine.New(err, nil))
-		error := getErrorCode(InternalError)
+		writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
-		w.Header().Set("Server", "Minio")
-		w.WriteHeader(error.HTTPStatusCode)
 	}
 }
 

pkg/server/api/response.go

@@ -201,6 +201,9 @@ func writeErrorResponse(w http.ResponseWriter, req *http.Request, errorType int,
 	setCommonHeaders(w, getContentTypeString(acceptsContentType), len(encodedErrorResponse))
 	// write Header
 	w.WriteHeader(error.HTTPStatusCode)
-	// write error body
+	// HEAD should have no body
-	w.Write(encodedErrorResponse)
+	if req.Method != "HEAD" {
+		// write error body
+		w.Write(encodedErrorResponse)
+	}
 }