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98 lines
3.0 KiB
98 lines
3.0 KiB
'use strict';
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var common = require('../common');
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var assert = require('assert');
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var http = require('http');
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var net = require('net');
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var spawn = require('child_process').spawn;
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if (common.isWindows) {
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common.skip('This test is disabled on windows.');
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return;
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}
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switch (process.argv[2]) {
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case 'child': return child();
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case 'parent': return parent();
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default: return test();
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}
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// spawn the parent, and listen for it to tell us the pid of the child.
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// WARNING: This is an example of listening on some arbitrary FD number
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// that has already been bound elsewhere in advance. However, binding
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// server handles to stdio fd's is NOT a good or reliable way to do
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// concurrency in HTTP servers! Use the cluster module, or if you want
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// a more low-level approach, use child process IPC manually.
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function test() {
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var parent = spawn(process.execPath, [__filename, 'parent'], {
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stdio: [ 0, 'pipe', 2 ]
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});
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var json = '';
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parent.stdout.on('data', function(c) {
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json += c.toString();
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if (json.indexOf('\n') !== -1) next();
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});
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function next() {
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console.error('output from parent = %s', json);
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var child = JSON.parse(json);
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// now make sure that we can request to the child, then kill it.
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http.get({
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server: 'localhost',
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port: child.port,
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path: '/',
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}).on('response', function(res) {
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var s = '';
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res.on('data', function(c) {
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s += c.toString();
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});
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res.on('end', function() {
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// kill the child before we start doing asserts.
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// it's really annoying when tests leave orphans!
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process.kill(child.pid, 'SIGKILL');
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try {
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parent.kill();
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} catch (e) {}
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assert.equal(s, 'hello from child\n');
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assert.equal(res.statusCode, 200);
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});
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});
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}
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}
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// Listen on port, and then pass the handle to the detached child.
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// Then output the child's pid, and immediately exit.
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function parent() {
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var server = net.createServer(function(conn) {
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conn.end('HTTP/1.1 403 Forbidden\r\n\r\nI got problems.\r\n');
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throw new Error('Should not see connections on parent');
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}).listen(0, function() {
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console.error('server listening on %d', this.address().port);
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var child = spawn(process.execPath, [__filename, 'child'], {
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stdio: [ 0, 1, 2, server._handle ],
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detached: true
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});
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console.log('%j\n', { pid: child.pid, port: this.address().port });
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// Now close the parent, so that the child is the only thing
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// referencing that handle. Note that connections will still
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// be accepted, because the child has the fd open, but the parent
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// will exit gracefully.
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server.close();
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child.unref();
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});
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}
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// Run as a child of the parent() mode.
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function child() {
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// start a server on fd=3
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http.createServer(function(req, res) {
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console.error('request on child');
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console.error('%s %s', req.method, req.url, req.headers);
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res.end('hello from child\n');
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}).listen({ fd: 3 }, function() {
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console.error('child listening on fd=3');
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});
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}
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