| /* |
| * |
| * 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. |
| * |
| */ |
| |
| // Binary client is an example client. |
| package main |
| |
| import ( |
| "context" |
| "flag" |
| "fmt" |
| "log" |
| "time" |
| |
| "google.golang.org/grpc" |
| ecpb "google.golang.org/grpc/examples/features/proto/echo" |
| hwpb "google.golang.org/grpc/examples/helloworld/helloworld" |
| ) |
| |
| var addr = flag.String("addr", "localhost:50051", "the address to connect to") |
| |
| // callSayHello calls SayHello on c with the given name, and prints the |
| // response. |
| func callSayHello(c hwpb.GreeterClient, name string) { |
| ctx, cancel := context.WithTimeout(context.Background(), time.Second) |
| defer cancel() |
| r, err := c.SayHello(ctx, &hwpb.HelloRequest{Name: name}) |
| if err != nil { |
| log.Fatalf("client.SayHello(_) = _, %v", err) |
| } |
| fmt.Println("Greeting: ", r.Message) |
| } |
| |
| func callUnaryEcho(client ecpb.EchoClient, message string) { |
| ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) |
| defer cancel() |
| resp, err := client.UnaryEcho(ctx, &ecpb.EchoRequest{Message: message}) |
| if err != nil { |
| log.Fatalf("client.UnaryEcho(_) = _, %v: ", err) |
| } |
| fmt.Println("UnaryEcho: ", resp.Message) |
| } |
| |
| func main() { |
| flag.Parse() |
| // Set up a connection to the server. |
| conn, err := grpc.Dial(*addr, grpc.WithInsecure()) |
| if err != nil { |
| log.Fatalf("did not connect: %v", err) |
| } |
| defer conn.Close() |
| |
| fmt.Println("--- calling helloworld.Greeter/SayHello ---") |
| // Make a greeter client and send an RPC. |
| hwc := hwpb.NewGreeterClient(conn) |
| callSayHello(hwc, "multiplex") |
| |
| fmt.Println() |
| fmt.Println("--- calling routeguide.RouteGuide/GetFeature ---") |
| // Make a routeguild client with the same ClientConn. |
| rgc := ecpb.NewEchoClient(conn) |
| callUnaryEcho(rgc, "this is examples/multiplex") |
| } |