Skip to content

Instantly share code, notes, and snippets.

@f3nry f3nry/main.go
Last active Feb 12, 2019

What would you like to do?
Simple Go gRPC Client
package main
import (
var (
tls = flag.Bool("tls", true, "Connection uses TLS if true, else plain TCP")
caFile = flag.String("ca_file", "", "The file containning the CA root cert file")
serverAddr = flag.String("server_addr", "<api-gateway-host>:443", "The server address in the format of host:port")
serverHostOverride = flag.String("server_host_override", "<api-gateway-host>", "The server name use to verify the hostname returned by TLS handshake")
func main() {
var opts []grpc.DialOption
if *tls {
creds, err := credentials.NewClientTLSFromFile(*caFile, *serverHostOverride)
if err != nil {
log.Fatalf("Failed to create TLS credentials %v", err)
opts = append(opts, grpc.WithTransportCredentials(creds))
opts = append(opts, grpc.WithWaitForHandshake())
} else {
opts = append(opts, grpc.WithInsecure())
conn, err := grpc.Dial(*serverAddr, opts...)
if err != nil {
log.Fatalf("fail to dial: %v", err)
defer conn.Close()
client := api.NewProdClient(conn)
resp, err := client.Alive(context.TODO(), &api.AliveRequest{Message: "Hello"})
if err != nil {
log.Fatalf("err making request: %v", err)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.