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test-http-agent-keepalive.js
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test-http-agent-keepalive.js
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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.
var common = require('../common');
var assert = require('assert');
var http = require('http');
var Agent = require('_http_agent').Agent;
var EventEmitter = require('events').EventEmitter;
var agent = new Agent({
keepAlive: true,
keepAliveMsecs: 1000,
maxSockets: 5,
maxFreeSockets: 5
});
var server = http.createServer(function (req, res) {
if (req.url === '/error') {
res.destroy();
return;
} else if (req.url === '/remote_close') {
// cache the socket, close it after 100ms
var socket = res.connection;
setTimeout(function () {
socket.end();
}, 100);
}
res.end('hello world');
});
function get(path, callback) {
return http.get({
host: 'localhost',
port: common.PORT,
agent: agent,
path: path
}, callback);
}
var name = 'localhost:' + common.PORT + '::';
function checkDataAndSockets(body) {
assert.equal(body.toString(), 'hello world');
assert.equal(agent.sockets[name].length, 1);
assert.equal(agent.freeSockets[name], undefined);
}
function second() {
// request second, use the same socket
get('/second', function (res) {
assert.equal(res.statusCode, 200);
res.on('data', checkDataAndSockets);
res.on('end', function () {
assert.equal(agent.sockets[name].length, 1);
assert.equal(agent.freeSockets[name], undefined);
process.nextTick(function () {
assert.equal(agent.sockets[name], undefined);
assert.equal(agent.freeSockets[name].length, 1);
remoteClose();
});
});
});
}
function remoteClose() {
// mock remote server close the socket
get('/remote_close', function (res) {
assert.deepEqual(res.statusCode, 200);
res.on('data', checkDataAndSockets);
res.on('end', function () {
assert.equal(agent.sockets[name].length, 1);
assert.equal(agent.freeSockets[name], undefined);
process.nextTick(function () {
assert.equal(agent.sockets[name], undefined);
assert.equal(agent.freeSockets[name].length, 1);
// waitting remote server close the socket
setTimeout(function () {
assert.equal(agent.sockets[name], undefined);
assert.equal(agent.freeSockets[name], undefined,
'freeSockets is not empty');
remoteError();
}, 200);
});
});
});
}
function remoteError() {
// remove server will destroy ths socket
var req = get('/error', function (res) {
throw new Error('should not call this function');
});
req.on('error', function (err) {
assert.ok(err);
assert.equal(err.message, 'socket hang up');
assert.equal(agent.sockets[name].length, 1);
assert.equal(agent.freeSockets[name], undefined);
// Wait socket 'close' event emit
setTimeout(function () {
assert.equal(agent.sockets[name], undefined);
assert.equal(agent.freeSockets[name], undefined);
done();
}, 1);
});
}
function done() {
console.log('http keepalive agent test success.');
process.exit(0);
}
server.listen(common.PORT, function() {
// request first, and keep alive
get('/first', function (res) {
assert.equal(res.statusCode, 200);
res.on('data', checkDataAndSockets);
res.on('end', function () {
assert.equal(agent.sockets[name].length, 1);
assert.equal(agent.freeSockets[name], undefined);
process.nextTick(function () {
assert.equal(agent.sockets[name], undefined);
assert.equal(agent.freeSockets[name].length, 1);
second();
});
});
});
});