| Dir : /proc/self/root/opt/alt/alt-nodejs10/root/lib/node_modules/npm/node_modules/tunnel-agent/ |
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| Dir : //proc/self/root/opt/alt/alt-nodejs10/root/lib/node_modules/npm/node_modules/tunnel-agent/index.js |
'use strict'
var net = require('net')
, tls = require('tls')
, http = require('http')
, https = require('https')
, events = require('events')
, assert = require('assert')
, util = require('util')
, Buffer = require('safe-buffer').Buffer
;
exports.httpOverHttp = httpOverHttp
exports.httpsOverHttp = httpsOverHttp
exports.httpOverHttps = httpOverHttps
exports.httpsOverHttps = httpsOverHttps
function httpOverHttp(options) {
var agent = new TunnelingAgent(options)
agent.request = http.request
return agent
}
function httpsOverHttp(options) {
var agent = new TunnelingAgent(options)
agent.request = http.request
agent.createSocket = createSecureSocket
agent.defaultPort = 443
return agent
}
function httpOverHttps(options) {
var agent = new TunnelingAgent(options)
agent.request = https.request
return agent
}
function httpsOverHttps(options) {
var agent = new TunnelingAgent(options)
agent.request = https.request
agent.createSocket = createSecureSocket
agent.defaultPort = 443
return agent
}
function TunnelingAgent(options) {
var self = this
self.options = options || {}
self.proxyOptions = self.options.proxy || {}
self.maxSockets = self.options.maxSockets || http.Agent.defaultMaxSockets
self.requests = []
self.sockets = []
self.on('free', function onFree(socket, host, port) {
for (var i = 0, len = self.requests.length; i < len; ++i) {
var pending = self.requests[i]
if (pending.host === host && pending.port === port) {
// Detect the request to connect same origin server,
// reuse the connection.
self.requests.splice(i, 1)
pending.request.onSocket(socket)
return
}
}
socket.destroy()
self.removeSocket(socket)
})
}
util.inherits(TunnelingAgent, events.EventEmitter)
TunnelingAgent.prototype.addRequest = function addRequest(req, options) {
var self = this
// Legacy API: addRequest(req, host, port, path)
if (typeof options === 'string') {
options = {
host: options,
port: arguments[2],
path: arguments[3]
};
}
if (self.sockets.length >= this.maxSockets) {
// We are over limit so we'll add it to the queue.
self.requests.push({host: options.host, port: options.port, request: req})
return
}
// If we are under maxSockets create a new one.
self.createConnection({host: options.host, port: options.port, request: req})
}
TunnelingAgent.prototype.createConnection = function createConnection(pending) {
var self = this
self.createSocket(pending, function(socket) {
socket.on('free', onFree)
socket.on('close', onCloseOrRemove)
socket.on('agentRemove', onCloseOrRemove)
pending.request.onSocket(socket)
function onFree() {
self.emit('free', socket, pending.host, pending.port)
}
function onCloseOrRemove(err) {
self.removeSocket(socket)
socket.removeListener('free', onFree)
socket.removeListener('close', onCloseOrRemove)
socket.removeListener('agentRemove', onCloseOrRemove)
}
})
}
TunnelingAgent.prototype.createSocket = function createSocket(options, cb) {
var self = this
var placeholder = {}
self.sockets.push(placeholder)
var connectOptions = mergeOptions({}, self.proxyOptions,
{ method: 'CONNECT'
, path: options.host + ':' + options.port
, agent: false
}
)
if (connectOptions.proxyAuth) {
connectOptions.headers = connectOptions.headers || {}
connectOptions.headers['Proxy-Authorization'] = 'Basic ' +
Buffer.from(connectOptions.proxyAuth).toString('base64')
}
debug('making CONNECT request')
var connectReq = self.request(connectOptions)
connectReq.useChunkedEncodingByDefault = false // for v0.6
connectReq.once('response', onResponse) // for v0.6
connectReq.once('upgrade', onUpgrade) // for v0.6
connectReq.once('connect', onConnect) // for v0.7 or later
connectReq.once('error', onError)
connectReq.end()
function onResponse(res) {
// Very hacky. This is necessary to avoid http-parser leaks.
res.upgrade = true
}
function onUpgrade(res, socket, head) {
// Hacky.
process.nextTick(function() {
onConnect(res, socket, head)
})
}
function onConnect(res, socket, head) {
connectReq.removeAllListeners()
socket.removeAllListeners()
if (res.statusCode === 200) {
assert.equal(head.length, 0)
debug('tunneling connection has established')
self.sockets[self.sockets.indexOf(placeholder)] = socket
cb(socket)
} else {
debug('tunneling socket could not be established, statusCode=%d', res.statusCode)
var error = new Error('tunneling socket could not be established, ' + 'statusCode=' + res.statusCode)
error.code = 'ECONNRESET'
options.request.emit('error', error)
self.removeSocket(placeholder)
}
}
function onError(cause) {
connectReq.removeAllListeners()
debug('tunneling socket could not be established, cause=%s\n', cause.message, cause.stack)
var error = new Error('tunneling socket could not be established, ' + 'cause=' + cause.message)
error.code = 'ECONNRESET'
options.request.emit('error', error)
self.removeSocket(placeholder)
}
}
TunnelingAgent.prototype.removeSocket = function removeSocket(socket) {
var pos = this.sockets.indexOf(socket)
if (pos === -1) return
this.sockets.splice(pos, 1)
var pending = this.requests.shift()
if (pending) {
// 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.createConnection(pending)
}
}
function createSecureSocket(options, cb) {
var self = this
TunnelingAgent.prototype.createSocket.call(self, options, function(socket) {
// 0 is dummy port for v0.6
var secureSocket = tls.connect(0, mergeOptions({}, self.options,
{ servername: options.host
, socket: socket
}
))
self.sockets[self.sockets.indexOf(socket)] = secureSocket
cb(secureSocket)
})
}
function mergeOptions(target) {
for (var i = 1, len = arguments.length; i < len; ++i) {
var overrides = arguments[i]
if (typeof overrides === 'object') {
var keys = Object.keys(overrides)
for (var j = 0, keyLen = keys.length; j < keyLen; ++j) {
var k = keys[j]
if (overrides[k] !== undefined) {
target[k] = overrides[k]
}
}
}
}
return target
}
var debug
if (process.env.NODE_DEBUG && /\btunnel\b/.test(process.env.NODE_DEBUG)) {
debug = function() {
var args = Array.prototype.slice.call(arguments)
if (typeof args[0] === 'string') {
args[0] = 'TUNNEL: ' + args[0]
} else {
args.unshift('TUNNEL:')
}
console.error.apply(console, args)
}
} else {
debug = function() {}
}
exports.debug = debug // for test