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main.go
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main.go
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package main
import (
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
"net"
"github.com/hoodyman/grpcpbexample/GrpcPbExmpl"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/grpclog"
)
type SrvImpl struct {
GrpcPbExmpl.UnimplementedGrpcPbExmplServer
}
func (s *SrvImpl) Ping(ctx context.Context, req *GrpcPbExmpl.Message) (*GrpcPbExmpl.Message, error) {
x := new(GrpcPbExmpl.Message)
x.MessageData = req.MessageData
return x, nil
}
func main() {
/// SERVER PART
srv_cert, err := tls.LoadX509KeyPair("srv-cert-not-secret.pem", "srv-key-not-secret.pem")
if err != nil {
grpclog.Errorln("srv load cert:", err)
return
}
srv_config := &tls.Config{}
srv_config.Certificates = []tls.Certificate{srv_cert}
srv_creds := credentials.NewTLS(srv_config)
srv := grpc.NewServer(grpc.Creds(srv_creds))
chCheckStopping := make(chan int)
defer func() {
srv.Stop()
<-chCheckStopping
}()
go func() {
defer func() { chCheckStopping <- 0 }()
l, err := net.Listen("tcp", ":6060")
if err != nil {
grpclog.Errorln("srv listen:", err)
return
}
GrpcPbExmpl.RegisterGrpcPbExmplServer(srv, &SrvImpl{})
err = srv.Serve(l)
if err != nil && err != grpc.ErrServerStopped {
grpclog.Errorln("srv serve:", err)
}
}()
/// CLIENT PART
cli_cert, err := ioutil.ReadFile("srv-cert-not-secret.pem")
if err != nil {
grpclog.Errorln("cli read cert:", err)
return
}
cli_cert_pool := x509.NewCertPool()
if !cli_cert_pool.AppendCertsFromPEM(cli_cert) {
grpclog.Errorln("cli pool:", err)
return
}
cli_config := &tls.Config{}
cli_config.RootCAs = cli_cert_pool
cli_conn, err := grpc.Dial(":6060", grpc.WithTransportCredentials(credentials.NewTLS(cli_config)))
if err != nil {
grpclog.Errorln("cli dial:", err)
return
}
cli := GrpcPbExmpl.NewGrpcPbExmplClient(cli_conn)
mess, err := cli.Ping(context.Background(), &GrpcPbExmpl.Message{MessageData: "Hello GRPCPB!"})
if err != nil {
grpclog.Errorln("cli ping:", err)
return
}
fmt.Println(mess.MessageData)
}