mirror of https://github.com/grpc/grpc-go.git
71 lines
1.9 KiB
Go
71 lines
1.9 KiB
Go
/*
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*
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* Copyright 2023 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// Binary client demonstrates how to handle errors returned by a gRPC server.
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package main
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import (
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"context"
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"flag"
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"log"
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"os/user"
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"time"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/credentials/insecure"
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pb "google.golang.org/grpc/examples/helloworld/helloworld"
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"google.golang.org/grpc/status"
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)
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var addr = flag.String("addr", "localhost:50052", "the address to connect to")
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func main() {
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flag.Parse()
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name := "unknown"
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if u, err := user.Current(); err == nil && u.Username != "" {
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name = u.Username
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}
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// Set up a connection to the server.
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conn, err := grpc.NewClient(*addr, grpc.WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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log.Fatalf("Failed to connect: %v", err)
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}
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defer conn.Close()
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c := pb.NewGreeterClient(conn)
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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defer cancel()
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for _, reqName := range []string{"", name} {
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log.Printf("Calling SayHello with Name:%q", reqName)
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r, err := c.SayHello(ctx, &pb.HelloRequest{Name: reqName})
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if err != nil {
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if status.Code(err) != codes.InvalidArgument {
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log.Printf("Received unexpected error: %v", err)
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continue
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}
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log.Printf("Received error: %v", err)
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continue
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}
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log.Printf("Received response: %s", r.Message)
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}
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}
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