vendor update for CSI 0.3.0

vendor/google.golang.org/grpc/examples/oauth/client/main.go

@@ -0,0 +1,72 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+// The client demonstrates how to supply an OAuth2 token for every RPC.
+package main
+
+import (
+	"crypto/tls"
+	"log"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/oauth2"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/oauth"
+	pb "google.golang.org/grpc/examples/helloworld/helloworld"
+)
+
+func main() {
+	perRPC := oauth.NewOauthAccess(fetchToken())
+	opts := []grpc.DialOption{
+		// In addition to the following grpc.DialOption, callers may also use
+		// the grpc.CallOption grpc.PerRPCCredentials with the RPC invocation
+		// itself.
+		// See: https://godoc.org/google.golang.org/grpc#PerRPCCredentials
+		grpc.WithPerRPCCredentials(perRPC),
+		// oauth.NewOauthAccess requires the configuration of transport
+		// credentials.
+		grpc.WithTransportCredentials(
+			credentials.NewTLS(&tls.Config{InsecureSkipVerify: true}),
+		),
+	}
+	conn, err := grpc.Dial(":8080", opts...)
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+	c := pb.NewGreeterClient(conn)
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	r, err := c.SayHello(ctx, &pb.HelloRequest{Name: "authenticated-client"})
+	if err != nil {
+		log.Fatalf("could not greet: %v", err)
+	}
+	log.Printf("Greeting: %s", r.Message)
+}
+
+// fetchToken simulates a token lookup and omits the details of proper token
+// acquisition. For examples of how to acquire an OAuth2 token, see:
+// https://godoc.org/golang.org/x/oauth2
+func fetchToken() *oauth2.Token {
+	return &oauth2.Token{
+		AccessToken: "some-secret-token",
+	}
+}