Implement gateway support Google Cloud Storage

vendor/google.golang.org/api/transport/dial_appengine.go

@@ -0,0 +1,40 @@
+// Copyright 2016 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build appengine
+
+package transport
+
+import (
+	"net"
+	"net/http"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/appengine/socket"
+	"google.golang.org/appengine/urlfetch"
+	"google.golang.org/grpc"
+)
+
+func init() {
+	appengineDialerHook = func(ctx context.Context) grpc.DialOption {
+		return grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
+			return socket.DialTimeout(ctx, "tcp", addr, timeout)
+		})
+	}
+
+	appengineUrlfetchHook = func(ctx context.Context) http.RoundTripper {
+		return &urlfetch.Transport{Context: ctx}
+	}
+}