1// Copyright Joyent, Inc. and other Node contributors.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a
4// copy of this software and associated documentation files (the
5// "Software"), to deal in the Software without restriction, including
6// without limitation the rights to use, copy, modify, merge, publish,
7// distribute, sublicense, and/or sell copies of the Software, and to permit
8// persons to whom the Software is furnished to do so, subject to the
9// following conditions:
10//
11// The above copyright notice and this permission notice shall be included
12// in all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20// USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22'use strict';
23const common = require('../common');
24if (common.isWindows)
25  common.skip('This test is disabled on windows.');
26
27const assert = require('assert');
28const http = require('http');
29const net = require('net');
30
31switch (process.argv[2]) {
32  case 'child': return child();
33}
34
35let ok;
36
37process.on('exit', function() {
38  assert.ok(ok);
39});
40
41// WARNING: This is an example of listening on some arbitrary FD number
42// that has already been bound elsewhere in advance.  However, binding
43// server handles to stdio fd's is NOT a good or reliable way to do
44// concurrency in HTTP servers!  Use the cluster module, or if you want
45// a more low-level approach, use child process IPC manually.
46test(function(child, port) {
47  // Now make sure that we can request to the subprocess, then kill it.
48  http.get({
49    server: 'localhost',
50    port: port,
51    path: '/',
52  }).on('response', function(res) {
53    let s = '';
54    res.on('data', function(c) {
55      s += c.toString();
56    });
57    res.on('end', function() {
58      child.kill();
59      child.on('exit', function() {
60        assert.strictEqual(s, 'hello from child\n');
61        assert.strictEqual(res.statusCode, 200);
62        console.log('ok');
63        ok = true;
64      });
65    });
66  });
67});
68
69function child() {
70  // Prevent outliving the parent process in case it is terminated before
71  // killing this child process.
72  process.on('disconnect', function() {
73    console.error('exit on disconnect');
74    process.exit(0);
75  });
76
77  // Start a server on fd=3
78  http.createServer(function(req, res) {
79    console.error('request on child');
80    console.error('%s %s', req.method, req.url, req.headers);
81    res.end('hello from child\n');
82  }).listen({ fd: 3 }, function() {
83    console.error('child listening on fd=3');
84    process.send('listening');
85  });
86}
87
88function test(cb) {
89  const server = net.createServer(function(conn) {
90    console.error('connection on parent');
91    conn.end('hello from parent\n');
92  }).listen(0, function() {
93    const port = this.address().port;
94    console.error('server listening on %d', port);
95
96    const spawn = require('child_process').spawn;
97    const child = spawn(process.execPath, [__filename, 'child'], {
98      stdio: [ 0, 1, 2, server._handle, 'ipc' ]
99    });
100
101    console.log('%j\n', { pid: child.pid });
102
103    // Now close the parent, so that the child is the only thing
104    // referencing that handle.  Note that connections will still
105    // be accepted, because the child has the fd open.
106    server.close();
107
108    child.on('message', function(msg) {
109      if (msg === 'listening') {
110        cb(child, port);
111      }
112    });
113  });
114}
115