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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 spawn = require('child_process').spawn;
switch (process.argv[2]) {
case 'child': return child();
case 'parent': return parent();
default: return test();
}
// Spawn the parent, and listen for it to tell us the pid of the child.
// 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.
function test() {
const parent = spawn(process.execPath, [__filename, 'parent'], {
stdio: [ 0, 'pipe', 2 ]
});
let json = '';
parent.stdout.on('data', function(c) {
json += c.toString();
if (json.includes('\n')) next();
});
function next() {
console.error('output from parent = %s', json);
const child = JSON.parse(json);
// Now make sure that we can request to the subprocess, then kill it.
http.get({
server: 'localhost',
port: child.port,
path: '/',
}).on('response', function(res) {
let s = '';
res.on('data', function(c) {
s += c.toString();
});
res.on('end', function() {
// Kill the subprocess before we start doing asserts.
// It's really annoying when tests leave orphans!
process.kill(child.pid, 'SIGKILL');
try {
parent.kill();
} catch {}
assert.strictEqual(s, 'hello from child\n');
assert.strictEqual(res.statusCode, 200);
});
});
}
}
// Listen on port, and then pass the handle to the detached child.
// Then output the child's pid, and immediately exit.
function parent() {
const server = net.createServer(function(conn) {
conn.end('HTTP/1.1 403 Forbidden\r\n\r\nI got problems.\r\n');
throw new Error('Should not see connections on parent');
}).listen(0, function() {
console.error('server listening on %d', this.address().port);
const child = spawn(process.execPath, [__filename, 'child'], {
stdio: [ 0, 1, 2, server._handle ],
detached: true
});
console.log('%j\n', { pid: child.pid, port: this.address().port });
// Now close the parent, so that the child is the only thing
// referencing that handle. Note that connections will still
// be accepted, because the child has the fd open, but the parent
// will exit gracefully.
server.close();
child.unref();
});
}
// Run as a child of the parent() mode.
function child() {
// Start a server on fd=3
http.createServer(function(req, res) {
console.error('request on child');
console.error('%s %s', req.method, req.url, req.headers);
res.end('hello from child\n');
}).listen({ fd: 3 }, function() {
console.error('child listening on fd=3');
});
}
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