Skip to content
This repository has been archived by the owner. It is now read-only.
Permalink
Browse files

An example using domains in an HTTP server

  • Loading branch information...
isaacs committed Apr 9, 2012
1 parent 0b738f1 commit bf7fda21b814f5fd78fd555520cfa74bf3f360bb
Showing with 115 additions and 0 deletions.
  1. +115 −0 test/simple/test-domain-http-server.js
@@ -0,0 +1,115 @@
// 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.

var domain = require('domain');
var http = require('http');
var assert = require('assert');
var common = require('../common.js');

var objects = { foo: 'bar', baz: {}, num: 42, arr: [1,2,3] };
objects.baz.asdf = objects;

var serverCaught = 0;
var clientCaught = 0

var server = http.createServer(function(req, res) {
var dom = domain.create();
dom.add(req);
dom.add(res);

dom.on('error', function(er) {
serverCaught++;
console.log('server error', er);
// try to send a 500. If that fails, oh well.
res.writeHead(500, {'content-type':'text/plain'});
res.end(er.stack || er.message || 'Unknown error');
});

var data;
dom.run(function() {
// Now, an action that has the potential to fail!
// if you request 'baz', then it'll throw a JSON circular ref error.
data = JSON.stringify(objects[req.url.replace(/[^a-z]/g, '')]);

// this line will throw if you pick an unknown key
assert(data !== undefined, 'Data should not be undefined');

res.writeHead(200);
res.end(data);
});
});

server.listen(common.PORT, next);

function next() {
console.log('listening on localhost:%d', common.PORT);

// now hit it a few times
var dom = domain.create();
var requests = 0;
var responses = 0;

makeReq('/');
makeReq('/foo');
makeReq('/arr');
makeReq('/baz');
makeReq('/num');

function makeReq(p) {
requests++;

var dom = domain.create();
dom.on('error', function(er) {
clientCaught++;
console.log('client error', er);
// kill everything.
dom.dispose();
});

var req = http.get({ host: 'localhost', port: common.PORT, path: p });
dom.add(req);
req.on('response', function(res) {
responses++;
console.error('requests=%d responses=%d', requests, responses);
if (responses === requests) {
console.error('done, closing server');
// no more coming.
server.close();
}

dom.add(res);
var d = '';
res.on('data', function(c) {
d += c;
});
res.on('end', function() {
d = JSON.parse(d);
console.log('json!', d);
});
});
}
}

process.on('exit', function() {
assert.equal(serverCaught, 2);
assert.equal(clientCaught, 2);
console.log('ok');
});

0 comments on commit bf7fda2

Please sign in to comment.
You can’t perform that action at this time.