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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const common = require('../common');
if (common.isWindows)
common.skip('This test is disabled on windows.');
const assert = require('assert');
const http = require('http');
const net = require('net');
const cluster = require('cluster');
console.error('Cluster listen fd test', process.argv[2] || 'runner');
// Process relationship is:
//
// parent: the test main script
// -> master: the cluster master
// -> worker: the cluster worker
switch (process.argv[2]) {
case 'master': return master();
case 'worker': return worker();
}
let ok;
process.on('exit', function() {
assert.ok(ok);
});
// Spawn the parent, and listen for it to tell us the pid of the cluster.
// WARNING: This is an example of listening on some arbitrary FD number
// that has already been bound elsewhere in advance. However, binding
// server handles to stdio fd's is NOT a good or reliable way to do
// concurrency in HTTP servers! Use the cluster module, or if you want
// a more low-level approach, use child process IPC manually.
test(function(parent, port) {
// Now make sure that we can request to the worker, then kill it.
http.get({
server: 'localhost',
port: port,
path: '/',
}).on('response', function(res) {
let s = '';
res.on('data', function(c) {
s += c.toString();
});
res.on('end', function() {
// Kill the worker before we start doing asserts.
// it's really annoying when tests leave orphans!
parent.kill();
parent.on('exit', function() {
assert.strictEqual(s, 'hello from worker\n');
assert.strictEqual(res.statusCode, 200);
console.log('ok');
ok = true;
});
});
});
});
function test(cb) {
console.error('about to listen in parent');
const server = net.createServer(function(conn) {
console.error('connection on parent');
conn.end('hello from parent\n');
}).listen(0, function() {
const port = this.address().port;
console.error(`server listening on ${port}`);
const spawn = require('child_process').spawn;
const master = spawn(process.execPath, [__filename, 'master'], {
stdio: [ 0, 'pipe', 2, server._handle, 'ipc' ],
detached: true
});
// Now close the parent, so that the master is the only thing
// referencing that handle. Note that connections will still
// be accepted, because the master has the fd open.
server.close();
master.on('exit', function(code) {
console.error('master exited', code);
});
master.on('close', function() {
console.error('master closed');
});
console.error('master spawned');
master.on('message', function(msg) {
if (msg === 'started worker') {
cb(master, port);
}
});
});
}
function master() {
console.error('in master, spawning worker');
cluster.setupMaster({
args: [ 'worker' ]
});
const worker = cluster.fork();
worker.on('message', function(msg) {
if (msg === 'worker ready') {
process.send('started worker');
}
});
// Prevent outliving our parent process in case it is abnormally killed -
// under normal conditions our parent kills this process before exiting.
process.on('disconnect', function() {
console.error('master exit on disconnect');
process.exit(0);
});
}
function worker() {
console.error('worker, about to create server and listen on fd=3');
// Start a server on fd=3
http.createServer(function(req, res) {
console.error('request on worker');
console.error('%s %s', req.method, req.url, req.headers);
res.end('hello from worker\n');
}).listen({ fd: 3 }, function() {
console.error('worker listening on fd=3');
process.send('worker ready');
});
}
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