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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);
}
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