| /* |
| * |
| * 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", |
| } |
| } |