mirror of https://github.com/grpc/grpc-node.git
263 lines
8.4 KiB
JavaScript
263 lines
8.4 KiB
JavaScript
/*
|
|
*
|
|
* Copyright 2023 gRPC authors.
|
|
*
|
|
* 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
|
|
*
|
|
* http://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.
|
|
*
|
|
*/
|
|
|
|
const grpc = require('@grpc/grpc-js');
|
|
const protoLoader = require('@grpc/proto-loader');
|
|
const parseArgs = require('minimist');
|
|
|
|
const PROTO_PATH = __dirname + '/../protos/echo.proto';
|
|
|
|
const packageDefinition = protoLoader.loadSync(
|
|
PROTO_PATH,
|
|
{keepCase: true,
|
|
longs: String,
|
|
enums: String,
|
|
defaults: true,
|
|
oneofs: true
|
|
});
|
|
const echoProto = grpc.loadPackageDefinition(packageDefinition).grpc.examples.echo;
|
|
|
|
const STREAMING_COUNT = 10;
|
|
|
|
function unaryCallWithMetadata(client, message) {
|
|
return new Promise((resolve, reject) => {
|
|
console.log('--- unary ---');
|
|
const requestMetadata = new grpc.Metadata();
|
|
requestMetadata.set('timestamp', new Date().toISOString());
|
|
const call = client.unaryEcho({message}, requestMetadata, (error, value) => {
|
|
if (error) {
|
|
console.log(`Received error ${error}`);
|
|
return;
|
|
}
|
|
console.log('Response:');
|
|
console.log(`- ${JSON.stringify(value)}`);
|
|
});
|
|
call.on('metadata', metadata => {
|
|
const timestamps = metadata.get('timestamp');
|
|
if (timestamps.length > 0) {
|
|
console.log('timestamp from header:');
|
|
for (const [index, value] of timestamps.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("timestamp expected but doesn't exist in header");
|
|
}
|
|
const locations = metadata.get('location');
|
|
if (locations.length > 0) {
|
|
console.log('location from header:');
|
|
for (const [index, value] of locations.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("location expected but doesn't exist in header");
|
|
}
|
|
});
|
|
call.on('status', status => {
|
|
const timestamps = status.metadata.get('timestamp');
|
|
if (timestamps.length > 0) {
|
|
console.log('timestamp from trailer:');
|
|
for (const [index, value] of timestamps.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("timestamp expected but doesn't exist in trailer");
|
|
}
|
|
resolve();
|
|
});
|
|
});
|
|
}
|
|
|
|
function serverStreamingWithMetadata(client, message) {
|
|
return new Promise((resolve, reject) => {
|
|
console.log('--- server streaming ---');
|
|
const requestMetadata = new grpc.Metadata();
|
|
requestMetadata.set('timestamp', new Date().toISOString());
|
|
const call = client.serverStreamingEcho({message}, requestMetadata);
|
|
call.on('metadata', metadata => {
|
|
const timestamps = metadata.get('timestamp');
|
|
if (timestamps.length > 0) {
|
|
console.log('timestamp from header:');
|
|
for (const [index, value] of timestamps.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("timestamp expected but doesn't exist in header");
|
|
}
|
|
const locations = metadata.get('location');
|
|
if (locations.length > 0) {
|
|
console.log('location from header:');
|
|
for (const [index, value] of locations.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("location expected but doesn't exist in header");
|
|
}
|
|
});
|
|
call.on('data', value => {
|
|
console.log(`Received response ${JSON.stringify(value)}`);
|
|
});
|
|
call.on('status', status => {
|
|
const timestamps = status.metadata.get('timestamp');
|
|
if (timestamps.length > 0) {
|
|
console.log('timestamp from trailer:');
|
|
for (const [index, value] of timestamps.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("timestamp expected but doesn't exist in trailer");
|
|
}
|
|
resolve();
|
|
});
|
|
call.on('error', error => {
|
|
console.log(`Received error ${error}`);
|
|
});
|
|
});
|
|
}
|
|
|
|
function clientStreamingWithMetadata(client, message) {
|
|
return new Promise((resolve, reject) => {
|
|
console.log('--- client streaming ---');
|
|
const requestMetadata = new grpc.Metadata();
|
|
requestMetadata.set('timestamp', new Date().toISOString());
|
|
const call = client.clientStreamingEcho(requestMetadata, (error, value) => {
|
|
if (error) {
|
|
console.log(`Received error ${error}`);
|
|
return;
|
|
}
|
|
console.log('Response:');
|
|
console.log(`- ${JSON.stringify(value)}`);
|
|
});
|
|
call.on('metadata', metadata => {
|
|
const timestamps = metadata.get('timestamp');
|
|
if (timestamps.length > 0) {
|
|
console.log('timestamp from header:');
|
|
for (const [index, value] of timestamps.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("timestamp expected but doesn't exist in header");
|
|
}
|
|
const locations = metadata.get('location');
|
|
if (locations.length > 0) {
|
|
console.log('location from header:');
|
|
for (const [index, value] of locations.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("location expected but doesn't exist in header");
|
|
}
|
|
});
|
|
call.on('status', status => {
|
|
const timestamps = status.metadata.get('timestamp');
|
|
if (timestamps.length > 0) {
|
|
console.log('timestamp from trailer:');
|
|
for (const [index, value] of timestamps.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("timestamp expected but doesn't exist in trailer");
|
|
}
|
|
resolve();
|
|
});
|
|
for (let i = 0; i < STREAMING_COUNT; i++) {
|
|
call.write({message});
|
|
}
|
|
call.end();
|
|
});
|
|
}
|
|
|
|
function bidirectionalWithMetadata(client, message) {
|
|
return new Promise((resolve, reject) => {
|
|
console.log('--- bidirectional ---');
|
|
const requestMetadata = new grpc.Metadata();
|
|
requestMetadata.set('timestamp', new Date().toISOString());
|
|
const call = client.bidirectionalStreamingEcho(requestMetadata);
|
|
call.on('metadata', metadata => {
|
|
const timestamps = metadata.get('timestamp');
|
|
if (timestamps.length > 0) {
|
|
console.log('timestamp from header:');
|
|
for (const [index, value] of timestamps.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("timestamp expected but doesn't exist in header");
|
|
}
|
|
const locations = metadata.get('location');
|
|
if (locations.length > 0) {
|
|
console.log('location from header:');
|
|
for (const [index, value] of locations.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("location expected but doesn't exist in header");
|
|
}
|
|
});
|
|
call.on('data', value => {
|
|
console.log(`Received response ${JSON.stringify(value)}`);
|
|
});
|
|
call.on('status', status => {
|
|
const timestamps = status.metadata.get('timestamp');
|
|
if (timestamps.length > 0) {
|
|
console.log('timestamp from trailer:');
|
|
for (const [index, value] of timestamps.entries()) {
|
|
console.log(` ${index}. ${value}`);
|
|
}
|
|
} else {
|
|
console.error("timestamp expected but doesn't exist in trailer");
|
|
}
|
|
resolve();
|
|
});
|
|
call.on('error', error => {
|
|
console.log(`Received error ${error}`);
|
|
});
|
|
for (let i = 0; i < STREAMING_COUNT; i++) {
|
|
call.write({message});
|
|
}
|
|
call.end();
|
|
});
|
|
}
|
|
|
|
function asyncWait(ms) {
|
|
return new Promise((resolve, reject) => {
|
|
setTimeout(resolve, ms);
|
|
});
|
|
}
|
|
|
|
const message = 'this is examples/metadata';
|
|
|
|
async function main() {
|
|
let argv = parseArgs(process.argv.slice(2), {
|
|
string: 'target',
|
|
default: {target: 'localhost:50052'}
|
|
});
|
|
const client = new echoProto.Echo(argv.target, grpc.credentials.createInsecure());
|
|
await unaryCallWithMetadata(client, message);
|
|
await asyncWait(1000);
|
|
|
|
await serverStreamingWithMetadata(client, message);
|
|
await asyncWait(1000);
|
|
|
|
await clientStreamingWithMetadata(client, message);
|
|
await asyncWait(1000);
|
|
|
|
await bidirectionalWithMetadata(client, message);
|
|
client.close();
|
|
}
|
|
|
|
main();
|