138 lines
4.1 KiB
JavaScript
138 lines
4.1 KiB
JavaScript
module.exports = ForeverAgent
|
|
ForeverAgent.SSL = ForeverAgentSSL
|
|
|
|
var util = require('util')
|
|
, Agent = require('http').Agent
|
|
, net = require('net')
|
|
, tls = require('tls')
|
|
, AgentSSL = require('https').Agent
|
|
|
|
function getConnectionName(host, port) {
|
|
var name = ''
|
|
if (typeof host === 'string') {
|
|
name = host + ':' + port
|
|
} else {
|
|
// For node.js v012.0 and iojs-v1.5.1, host is an object. And any existing localAddress is part of the connection name.
|
|
name = host.host + ':' + host.port + ':' + (host.localAddress ? (host.localAddress + ':') : ':')
|
|
}
|
|
return name
|
|
}
|
|
|
|
function ForeverAgent(options) {
|
|
var self = this
|
|
self.options = options || {}
|
|
self.requests = {}
|
|
self.sockets = {}
|
|
self.freeSockets = {}
|
|
self.maxSockets = self.options.maxSockets || Agent.defaultMaxSockets
|
|
self.minSockets = self.options.minSockets || ForeverAgent.defaultMinSockets
|
|
self.on('free', function(socket, host, port) {
|
|
var name = getConnectionName(host, port)
|
|
|
|
if (self.requests[name] && self.requests[name].length) {
|
|
self.requests[name].shift().onSocket(socket)
|
|
} else if (self.sockets[name].length < self.minSockets) {
|
|
if (!self.freeSockets[name]) self.freeSockets[name] = []
|
|
self.freeSockets[name].push(socket)
|
|
|
|
// if an error happens while we don't use the socket anyway, meh, throw the socket away
|
|
var onIdleError = function() {
|
|
socket.destroy()
|
|
}
|
|
socket._onIdleError = onIdleError
|
|
socket.on('error', onIdleError)
|
|
} else {
|
|
// If there are no pending requests just destroy the
|
|
// socket and it will get removed from the pool. This
|
|
// gets us out of timeout issues and allows us to
|
|
// default to Connection:keep-alive.
|
|
socket.destroy()
|
|
}
|
|
})
|
|
|
|
}
|
|
util.inherits(ForeverAgent, Agent)
|
|
|
|
ForeverAgent.defaultMinSockets = 5
|
|
|
|
|
|
ForeverAgent.prototype.createConnection = net.createConnection
|
|
ForeverAgent.prototype.addRequestNoreuse = Agent.prototype.addRequest
|
|
ForeverAgent.prototype.addRequest = function(req, host, port) {
|
|
var name = getConnectionName(host, port)
|
|
|
|
if (typeof host !== 'string') {
|
|
var options = host
|
|
port = options.port
|
|
host = options.host
|
|
}
|
|
|
|
if (this.freeSockets[name] && this.freeSockets[name].length > 0 && !req.useChunkedEncodingByDefault) {
|
|
var idleSocket = this.freeSockets[name].pop()
|
|
idleSocket.removeListener('error', idleSocket._onIdleError)
|
|
delete idleSocket._onIdleError
|
|
req._reusedSocket = true
|
|
req.onSocket(idleSocket)
|
|
} else {
|
|
this.addRequestNoreuse(req, host, port)
|
|
}
|
|
}
|
|
|
|
ForeverAgent.prototype.removeSocket = function(s, name, host, port) {
|
|
if (this.sockets[name]) {
|
|
var index = this.sockets[name].indexOf(s)
|
|
if (index !== -1) {
|
|
this.sockets[name].splice(index, 1)
|
|
}
|
|
} else if (this.sockets[name] && this.sockets[name].length === 0) {
|
|
// don't leak
|
|
delete this.sockets[name]
|
|
delete this.requests[name]
|
|
}
|
|
|
|
if (this.freeSockets[name]) {
|
|
var index = this.freeSockets[name].indexOf(s)
|
|
if (index !== -1) {
|
|
this.freeSockets[name].splice(index, 1)
|
|
if (this.freeSockets[name].length === 0) {
|
|
delete this.freeSockets[name]
|
|
}
|
|
}
|
|
}
|
|
|
|
if (this.requests[name] && this.requests[name].length) {
|
|
// If we have pending requests and a socket gets closed a new one
|
|
// needs to be created to take over in the pool for the one that closed.
|
|
this.createSocket(name, host, port).emit('free')
|
|
}
|
|
}
|
|
|
|
function ForeverAgentSSL (options) {
|
|
ForeverAgent.call(this, options)
|
|
}
|
|
util.inherits(ForeverAgentSSL, ForeverAgent)
|
|
|
|
ForeverAgentSSL.prototype.createConnection = createConnectionSSL
|
|
ForeverAgentSSL.prototype.addRequestNoreuse = AgentSSL.prototype.addRequest
|
|
|
|
function createConnectionSSL (port, host, options) {
|
|
if (typeof port === 'object') {
|
|
options = port;
|
|
} else if (typeof host === 'object') {
|
|
options = host;
|
|
} else if (typeof options === 'object') {
|
|
options = options;
|
|
} else {
|
|
options = {};
|
|
}
|
|
|
|
if (typeof port === 'number') {
|
|
options.port = port;
|
|
}
|
|
|
|
if (typeof host === 'string') {
|
|
options.host = host;
|
|
}
|
|
|
|
return tls.connect(options);
|
|
}
|