Update dependencies

vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go

@@ -65,7 +65,7 @@ var (
 )
 
 type errorBody struct {
-	Error   string     `protobuf:"bytes,1,name=error" json:"error"`
+	Error string `protobuf:"bytes,1,name=error" json:"error"`
 	// This is to make the error more compatible with users that expect errors to be Status objects:
 	// https://github.com/grpc/grpc/blob/master/src/proto/grpc/status/status.proto
 	// It should be the exact same message as the Error field.
@@ -88,14 +88,23 @@ func (*errorBody) ProtoMessage()    {}
 func DefaultHTTPError(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, _ *http.Request, err error) {
 	const fallback = `{"error": "failed to marshal error message"}`
 
-	w.Header().Del("Trailer")
-	w.Header().Set("Content-Type", marshaler.ContentType())
-
 	s, ok := status.FromError(err)
 	if !ok {
 		s = status.New(codes.Unknown, err.Error())
 	}
 
+	w.Header().Del("Trailer")
+
+	contentType := marshaler.ContentType()
+	// Check marshaler on run time in order to keep backwards compatability
+	// An interface param needs to be added to the ContentType() function on
+	// the Marshal interface to be able to remove this check
+	if httpBodyMarshaler, ok := marshaler.(*HTTPBodyMarshaler); ok {
+		pb := s.Proto()
+		contentType = httpBodyMarshaler.ContentTypeFromMessage(pb)
+	}
+	w.Header().Set("Content-Type", contentType)
+
 	body := &errorBody{
 		Error:   s.Message(),
 		Message: s.Message(),

vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go

@@ -121,7 +121,16 @@ func ForwardResponseMessage(ctx context.Context, mux *ServeMux, marshaler Marsha
 
 	handleForwardResponseServerMetadata(w, mux, md)
 	handleForwardResponseTrailerHeader(w, md)
-	w.Header().Set("Content-Type", marshaler.ContentType())
+
+	contentType := marshaler.ContentType()
+	// Check marshaler on run time in order to keep backwards compatability
+	// An interface param needs to be added to the ContentType() function on 
+	// the Marshal interface to be able to remove this check
+	if httpBodyMarshaler, ok := marshaler.(*HTTPBodyMarshaler); ok {
+		contentType = httpBodyMarshaler.ContentTypeFromMessage(resp)
+	}
+	w.Header().Set("Content-Type", contentType)
+
 	if err := handleForwardResponseOptions(ctx, w, resp, opts); err != nil {
 		HTTPError(ctx, mux, marshaler, w, req, err)
 		return

vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go

@@ -0,0 +1,43 @@
+package runtime
+
+import (
+	"google.golang.org/genproto/googleapis/api/httpbody"
+)
+
+// SetHTTPBodyMarshaler overwrite the default marshaler with the HTTPBodyMarshaler
+func SetHTTPBodyMarshaler(serveMux *ServeMux) {
+	serveMux.marshalers.mimeMap[MIMEWildcard] = &HTTPBodyMarshaler{
+		Marshaler: &JSONPb{OrigName: true},
+	}
+}
+
+// HTTPBodyMarshaler is a Marshaler which supports marshaling of a
+// google.api.HttpBody message as the full response body if it is
+// the actual message used as the response. If not, then this will
+// simply fallback to the Marshaler specified as its default Marshaler.
+type HTTPBodyMarshaler struct {
+	Marshaler
+}
+
+// ContentType implementation to keep backwards compatability with marshal interface
+func (h *HTTPBodyMarshaler) ContentType() string {
+	return h.ContentTypeFromMessage(nil)
+}
+
+// ContentTypeFromMessage in case v is a google.api.HttpBody message it returns
+// its specified content type otherwise fall back to the default Marshaler.
+func (h *HTTPBodyMarshaler) ContentTypeFromMessage(v interface{}) string {
+	if httpBody, ok := v.(*httpbody.HttpBody); ok {
+		return httpBody.GetContentType()
+	}
+	return h.Marshaler.ContentType()
+}
+
+// Marshal marshals "v" by returning the body bytes if v is a
+// google.api.HttpBody message, otherwise it falls back to the default Marshaler.
+func (h *HTTPBodyMarshaler) Marshal(v interface{}) ([]byte, error) {
+	if httpBody, ok := v.(*httpbody.HttpBody); ok {
+		return httpBody.Data, nil
+	}
+	return h.Marshaler.Marshal(v)
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto_errors.go

@@ -26,14 +26,23 @@ func DefaultHTTPProtoErrorHandler(ctx context.Context, mux *ServeMux, marshaler
 	// return Internal when Marshal failed
 	const fallback = `{"code": 13, "message": "failed to marshal error message"}`
 
-	w.Header().Del("Trailer")
-	w.Header().Set("Content-Type", marshaler.ContentType())
-
 	s, ok := status.FromError(err)
 	if !ok {
 		s = status.New(codes.Unknown, err.Error())
 	}
 
+	w.Header().Del("Trailer")
+
+	contentType := marshaler.ContentType()
+	// Check marshaler on run time in order to keep backwards compatability
+	// An interface param needs to be added to the ContentType() function on 
+	// the Marshal interface to be able to remove this check
+	if httpBodyMarshaler, ok := marshaler.(*HTTPBodyMarshaler); ok {
+		pb := s.Proto()
+		contentType = httpBodyMarshaler.ContentTypeFromMessage(pb)
+	}
+	w.Header().Set("Content-Type", contentType)
+
 	buf, merr := marshaler.Marshal(s.Proto())
 	if merr != nil {
 		grpclog.Infof("Failed to marshal error message %q: %v", s.Proto(), merr)