mirror of https://github.com/grpc/grpc-node.git
114 lines
3.5 KiB
JavaScript
114 lines
3.5 KiB
JavaScript
/*
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*
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* Copyright 2024 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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const grpc = require('@grpc/grpc-js');
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const protoLoader = require('@grpc/proto-loader');
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const parseArgs = require('minimist');
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const PROTO_PATH = __dirname + '/../protos/echo.proto';
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const packageDefinition = protoLoader.loadSync(
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PROTO_PATH,
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{keepCase: true,
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longs: String,
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enums: String,
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defaults: true,
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oneofs: true
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});
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const echoProto = grpc.loadPackageDefinition(packageDefinition).grpc.examples.echo;
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function authInterceptor(options, nextCall) {
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const requester = (new grpc.RequesterBuilder())
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.withStart((metadata, listener, next) => {
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metadata.set('authorization', 'some-secret-token');
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next(metadata, listener);
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}).build();
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return new grpc.InterceptingCall(nextCall(options), requester);
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}
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// logger is to mock a sophisticated logging system. To simplify the example, we just print out the content.
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function logger(format, ...args) {
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console.log(`LOG (client):\t${format}\n`, ...args);
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}
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function loggingInterceptor(options, nextCall) {
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const listener = (new grpc.ListenerBuilder())
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.withOnReceiveMessage((message, next) => {
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logger(`Receive a message ${JSON.stringify(message)} at ${(new Date()).toISOString()}`);
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next(message);
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}).build();
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const requester = (new grpc.RequesterBuilder())
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.withSendMessage((message, next) => {
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logger(`Send a message ${JSON.stringify(message)} at ${(new Date()).toISOString()}`);
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next(message);
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}).build();
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return new grpc.InterceptingCall(nextCall(options), requester);
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}
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function callUnaryEcho(client, message) {
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return new Promise((resolve, reject) => {
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const deadline = new Date();
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deadline.setSeconds(deadline.getSeconds() + 10);
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client.unaryEcho({message: message}, {deadline}, (error, value) => {
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if (error) {
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reject(error);
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return;
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}
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console.log(`UnaryEcho: ${JSON.stringify(value)}`);
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resolve();
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});
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});
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}
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function callBidiStreamingEcho(client) {
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return new Promise((resolve, reject) => {
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const deadline = new Date();
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deadline.setSeconds(deadline.getSeconds() + 10);
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const call = client.bidirectionalStreamingEcho({deadline});
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call.on('data', value => {
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console.log(`BidiStreamingEcho: ${JSON.stringify(value)}`);
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});
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call.on('status', status => {
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if (status.code === grpc.status.OK) {
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resolve();
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} else {
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reject(status);
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}
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});
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call.on('error', () => {
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// Ignore error event
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});
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for (let i = 0; i < 5; i++) {
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call.write({message: `Request ${i + 1}`});
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}
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call.end();
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});
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}
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async function main() {
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let argv = parseArgs(process.argv.slice(2), {
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string: 'target',
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default: {target: 'localhost:50051'}
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});
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const client = new echoProto.Echo(argv.target, grpc.credentials.createInsecure(), {interceptors: [authInterceptor, loggingInterceptor]});
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await callUnaryEcho(client, 'hello world');
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await callBidiStreamingEcho(client);
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}
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main();
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