// DialGRPC returns a GRPC connection for use communicating with a Google cloud
// service, configured with the given ClientOptions.
func DialGRPC(ctx context.Context, opt ...cloud.ClientOption) (*grpc.ClientConn, error) {
var o opts.DialOpt
for _, opt := range opt {
opt.Resolve(&o)
}
if o.HTTPClient != nil {
return nil, errors.New("unsupported HTTP base transport specified")
}
if o.GRPCClient != nil {
return o.GRPCClient, nil
}
if o.TokenSource == nil {
var err error
o.TokenSource, err = google.DefaultTokenSource(ctx, o.Scopes...)
if err != nil {
return nil, fmt.Errorf("google.DefaultTokenSource: %v", err)
}
}
grpcOpts := []grpc.DialOption{
grpc.WithPerRPCCredentials(oauth.TokenSource{o.TokenSource}),
grpc.WithTransportCredentials(credentials.NewClientTLSFromCert(nil, "")),
}
grpcOpts = append(grpcOpts, o.GRPCDialOpts...)
if o.UserAgent != "" {
grpcOpts = append(grpcOpts, grpc.WithUserAgent(o.UserAgent))
}
return grpc.Dial(o.Endpoint, grpcOpts...)
}
func main() {
flag.Parse()
serverAddr := net.JoinHostPort(*serverHost, strconv.Itoa(*serverPort))
var opts []grpc.DialOption
if *useTLS {
var sn string
if *tlsServerName != "" {
sn = *tlsServerName
}
var creds credentials.TransportAuthenticator
if *testCA {
var err error
creds, err = credentials.NewClientTLSFromFile(testCAFile, sn)
if err != nil {
grpclog.Fatalf("Failed to create TLS credentials %v", err)
}
} else {
creds = credentials.NewClientTLSFromCert(nil, sn)
}
opts = append(opts, grpc.WithTransportCredentials(creds))
if *testCase == "compute_engine_creds" {
opts = append(opts, grpc.WithPerRPCCredentials(oauth.NewComputeEngine()))
} else if *testCase == "service_account_creds" {
jwtCreds, err := oauth.NewServiceAccountFromFile(*serviceAccountKeyFile, *oauthScope)
if err != nil {
grpclog.Fatalf("Failed to create JWT credentials: %v", err)
}
opts = append(opts, grpc.WithPerRPCCredentials(jwtCreds))
} else if *testCase == "jwt_token_creds" {
jwtCreds, err := oauth.NewJWTAccessFromFile(*serviceAccountKeyFile)
if err != nil {
grpclog.Fatalf("Failed to create JWT credentials: %v", err)
}
opts = append(opts, grpc.WithPerRPCCredentials(jwtCreds))
} else if *testCase == "oauth2_auth_token" {
opts = append(opts, grpc.WithPerRPCCredentials(oauth.NewOauthAccess(interop.GetToken(*serviceAccountKeyFile, *oauthScope))))
}
} else {
opts = append(opts, grpc.WithInsecure())
}
conn, err := grpc.Dial(serverAddr, opts...)
if err != nil {
grpclog.Fatalf("Fail to dial: %v", err)
}
defer conn.Close()
tc := testpb.NewTestServiceClient(conn)
switch *testCase {
case "empty_unary":
interop.DoEmptyUnaryCall(tc)
case "large_unary":
interop.DoLargeUnaryCall(tc)
case "client_streaming":
interop.DoClientStreaming(tc)
case "server_streaming":
interop.DoServerStreaming(tc)
case "ping_pong":
interop.DoPingPong(tc)
case "empty_stream":
interop.DoEmptyStream(tc)
case "timeout_on_sleeping_server":
interop.DoTimeoutOnSleepingServer(tc)
case "compute_engine_creds":
if !*useTLS {
grpclog.Fatalf("TLS is not enabled. TLS is required to execute compute_engine_creds test case.")
}
interop.DoComputeEngineCreds(tc, *defaultServiceAccount, *oauthScope)
case "service_account_creds":
if !*useTLS {
grpclog.Fatalf("TLS is not enabled. TLS is required to execute service_account_creds test case.")
}
interop.DoServiceAccountCreds(tc, *serviceAccountKeyFile, *oauthScope)
case "jwt_token_creds":
if !*useTLS {
grpclog.Fatalf("TLS is not enabled. TLS is required to execute jwt_token_creds test case.")
}
interop.DoJWTTokenCreds(tc, *serviceAccountKeyFile)
case "per_rpc_creds":
if !*useTLS {
grpclog.Fatalf("TLS is not enabled. TLS is required to execute per_rpc_creds test case.")
}
interop.DoPerRPCCreds(tc, *serviceAccountKeyFile, *oauthScope)
case "oauth2_auth_token":
if !*useTLS {
grpclog.Fatalf("TLS is not enabled. TLS is required to execute oauth2_auth_token test case.")
}
interop.DoOauth2TokenCreds(tc, *serviceAccountKeyFile, *oauthScope)
case "cancel_after_begin":
interop.DoCancelAfterBegin(tc)
case "cancel_after_first_response":
interop.DoCancelAfterFirstResponse(tc)
default:
grpclog.Fatal("Unsupported test case: ", *testCase)
}
}