/
client.go
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/
client.go
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// Copyright 2019 Google LLC
//
// 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
//
// https://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.
// Package client is a CLI to make requests to the grpc-ping service.
package main
import (
"context"
"crypto/tls"
"flag"
"log"
"os"
"time"
ptypes "github.com/golang/protobuf/ptypes"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
pb "github.com/GoogleCloudPlatform/golang-samples/run/grpc-ping/pkg/api/v1"
)
var (
logger = log.New(os.Stdout, "", 0)
serverAddr = flag.String("server", "", "Server address (host:port)")
serverHost = flag.String("server-host", "", "Host name to which server IP should resolve")
insecure = flag.Bool("insecure", false, "Skip SSL validation? [false]")
skipVerify = flag.Bool("skip-verify", false, "Skip server hostname verification in SSL validation [false]")
message = flag.String("message", "Hi there", "The body of the content sent to server")
sendUpstream = flag.Bool("relay", false, "Direct ping to relay the request to a ping-upstream service [false]")
)
func main() {
flag.Parse()
var opts []grpc.DialOption
if *serverHost != "" {
opts = append(opts, grpc.WithAuthority(*serverHost))
}
if *insecure {
opts = append(opts, grpc.WithInsecure())
} else {
cred := credentials.NewTLS(&tls.Config{
InsecureSkipVerify: *skipVerify,
})
opts = append(opts, grpc.WithTransportCredentials(cred))
}
conn, err := grpc.Dial(*serverAddr, opts...)
if err != nil {
logger.Printf("Failed to dial: %v", err)
}
defer conn.Close()
client := pb.NewPingServiceClient(conn)
send(client)
}
func send(client pb.PingServiceClient) {
ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
defer cancel()
var resp *pb.Response
var err error
if *sendUpstream {
resp, err = client.SendUpstream(ctx, &pb.Request{
Message: *message,
})
} else {
resp, err = client.Send(ctx, &pb.Request{
Message: *message,
})
}
if err != nil {
logger.Fatalf("Error while executing Send: %v", err)
}
respMessage := resp.Pong.GetMessage()
timestamp := ptypes.TimestampString(resp.Pong.GetReceivedOn())
logger.Println("Unary Request/Unary Response")
logger.Printf(" Sent Ping: %s", *message)
logger.Printf(" Received:\n Pong: %s\n Server Time: %s", respMessage, timestamp)
}