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