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-rw-r--r--node_modules/tunnel/lib/tunnel.js264
1 files changed, 264 insertions, 0 deletions
diff --git a/node_modules/tunnel/lib/tunnel.js b/node_modules/tunnel/lib/tunnel.js
new file mode 100644
index 0000000..10cc382
--- /dev/null
+++ b/node_modules/tunnel/lib/tunnel.js
@@ -0,0 +1,264 @@
+'use strict';
+
+var net = require('net');
+var tls = require('tls');
+var http = require('http');
+var https = require('https');
+var events = require('events');
+var assert = require('assert');
+var util = require('util');
+
+
+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, localAddress) {
+ var options = toOptions(host, port, localAddress);
+ for (var i = 0, len = self.requests.length; i < len; ++i) {
+ var pending = self.requests[i];
+ if (pending.host === options.host && pending.port === options.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, host, port, localAddress) {
+ var self = this;
+ var options = mergeOptions({request: req}, self.options, toOptions(host, port, localAddress));
+
+ if (self.sockets.length >= this.maxSockets) {
+ // We are over limit so we'll add it to the queue.
+ self.requests.push(options);
+ return;
+ }
+
+ // If we are under maxSockets create a new one.
+ self.createSocket(options, function(socket) {
+ socket.on('free', onFree);
+ socket.on('close', onCloseOrRemove);
+ socket.on('agentRemove', onCloseOrRemove);
+ req.onSocket(socket);
+
+ function onFree() {
+ self.emit('free', socket, options);
+ }
+
+ 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,
+ headers: {
+ host: options.host + ':' + options.port
+ }
+ });
+ if (options.localAddress) {
+ connectOptions.localAddress = options.localAddress;
+ }
+ if (connectOptions.proxyAuth) {
+ connectOptions.headers = connectOptions.headers || {};
+ connectOptions.headers['Proxy-Authorization'] = 'Basic ' +
+ new Buffer(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) {
+ debug('tunneling socket could not be established, statusCode=%d',
+ res.statusCode);
+ socket.destroy();
+ var error = new Error('tunneling socket could not be established, ' +
+ 'statusCode=' + res.statusCode);
+ error.code = 'ECONNRESET';
+ options.request.emit('error', error);
+ self.removeSocket(placeholder);
+ return;
+ }
+ if (head.length > 0) {
+ debug('got illegal response body from proxy');
+ socket.destroy();
+ var error = new Error('got illegal response body from proxy');
+ error.code = 'ECONNRESET';
+ options.request.emit('error', error);
+ self.removeSocket(placeholder);
+ return;
+ }
+ debug('tunneling connection has established');
+ self.sockets[self.sockets.indexOf(placeholder)] = socket;
+ return cb(socket);
+ }
+
+ 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.createSocket(pending, function(socket) {
+ pending.request.onSocket(socket);
+ });
+ }
+};
+
+function createSecureSocket(options, cb) {
+ var self = this;
+ TunnelingAgent.prototype.createSocket.call(self, options, function(socket) {
+ var hostHeader = options.request.getHeader('host');
+ var tlsOptions = mergeOptions({}, self.options, {
+ socket: socket,
+ servername: hostHeader ? hostHeader.replace(/:.*$/, '') : options.host
+ });
+
+ // 0 is dummy port for v0.6
+ var secureSocket = tls.connect(0, tlsOptions);
+ self.sockets[self.sockets.indexOf(socket)] = secureSocket;
+ cb(secureSocket);
+ });
+}
+
+
+function toOptions(host, port, localAddress) {
+ if (typeof host === 'string') { // since v0.10
+ return {
+ host: host,
+ port: port,
+ localAddress: localAddress
+ };
+ }
+ return host; // for v0.11 or later
+}
+
+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