4 files changed, 557 insertions, 0 deletions
diff --git a/node_modules/agentkeepalive/lib/_http_agent.js b/node_modules/agentkeepalive/lib/_http_agent.js
new file mode 100644
index 00000000..3c20b028
--- /dev/null
+++ b/node_modules/agentkeepalive/lib/_http_agent.js
@@ -0,0 +1,334 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// copy from https://github.com/nodejs/node/blob/v4.x/lib/_http_agent.js
+
+'use strict';
+
+var net = require('net');
+var util = require('util');
+var EventEmitter = require('events').EventEmitter;
+var debug = require('./utils').debug;
+
+// New Agent code.
+
+// The largest departure from the previous implementation is that
+// an Agent instance holds connections for a variable number of host:ports.
+// Surprisingly, this is still API compatible as far as third parties are
+// concerned. The only code that really notices the difference is the
+// request object.
+
+// Another departure is that all code related to HTTP parsing is in
+// ClientRequest.onSocket(). The Agent is now *strictly*
+// concerned with managing a connection pool.
+
+function Agent(options) {
+  if (!(this instanceof Agent))
+    return new Agent(options);
+
+  EventEmitter.call(this);
+
+  var self = this;
+
+  self.defaultPort = 80;
+  self.protocol = 'http:';
+
+  self.options = util._extend({}, options);
+
+  // don't confuse net and make it think that we're connecting to a pipe
+  self.options.path = null;
+  self.requests = {};
+  self.sockets = {};
+  self.freeSockets = {};
+  self.keepAliveMsecs = self.options.keepAliveMsecs || 1000;
+  self.keepAlive = self.options.keepAlive || false;
+  // free keep-alive socket timeout. By default free socket do not have a timeout.
+  // keepAliveTimeout should be rename to `freeSocketKeepAliveTimeout`
+  self.keepAliveTimeout = self.options.keepAliveTimeout || 0;
+  // working socket timeout. By default working socket do not have a timeout.
+  self.timeout = self.options.timeout || 0;
+  self.maxSockets = self.options.maxSockets || Agent.defaultMaxSockets;
+  self.maxFreeSockets = self.options.maxFreeSockets || 256;
+
+  self.on('free', function(socket, options) {
+    var name = self.getName(options);
+    debug('agent.on(free)', name);
+
+    if (!socket.destroyed &&
+        self.requests[name] && self.requests[name].length) {
+      self.requests[name].shift().onSocket(socket);
+      if (self.requests[name].length === 0) {
+        // don't leak
+        delete self.requests[name];
+      }
+      debug('continue handle next request');
+    } else {
+      // If there are no pending requests, then put it in
+      // the freeSockets pool, but only if we're allowed to do so.
+      var req = socket._httpMessage;
+      if (req &&
+          req.shouldKeepAlive &&
+          !socket.destroyed &&
+          self.options.keepAlive) {
+        var freeSockets = self.freeSockets[name];
+        var freeLen = freeSockets ? freeSockets.length : 0;
+        var count = freeLen;
+        if (self.sockets[name])
+          count += self.sockets[name].length;
+        // console.log(count, freeLen, self.maxSockets, self.maxFreeSockets)
+        if (count > self.maxSockets || freeLen >= self.maxFreeSockets) {
+          // console.log('hit max sockets', count, freeLen, self.maxSockets, self.maxFreeSockets);
+          self.removeSocket(socket, options);
+          socket.destroy();
+        } else {
+          freeSockets = freeSockets || [];
+          self.freeSockets[name] = freeSockets;
+          socket.setKeepAlive(true, self.keepAliveMsecs);
+          socket.unref && socket.unref();
+          socket._httpMessage = null;
+          self.removeSocket(socket, options);
+          freeSockets.push(socket);
+
+          // Add a default error handler to avoid Unhandled 'error' event throw on idle socket
+          // https://github.com/node-modules/agentkeepalive/issues/25
+          // https://github.com/nodejs/node/pull/4482 (fixed in >= 4.4.0 and >= 5.4.0)
+          if (socket.listeners('error').length === 0) {
+            socket.once('error', freeSocketErrorListener);
+          }
+
+          // set free keepalive timer
+          socket.setTimeout(self.keepAliveTimeout);
+        }
+      } else {
+        self.removeSocket(socket, options);
+        socket.destroy();
+      }
+    }
+  });
+}
+
+util.inherits(Agent, EventEmitter);
+exports.Agent = Agent;
+
+function freeSocketErrorListener(err) {
+  var socket = this;
+  debug('SOCKET ERROR on FREE socket:', err.message, err.stack);
+  socket.destroy();
+  socket.emit('agentRemove');
+}
+
+Agent.defaultMaxSockets = Infinity;
+
+Agent.prototype.createConnection = net.createConnection;
+
+// Get the key for a given set of request options
+Agent.prototype.getName = function(options) {
+  var name = '';
+
+  if (options.host)
+    name += options.host;
+  else
+    name += 'localhost';
+
+  name += ':';
+  if (options.port)
+    name += options.port;
+  name += ':';
+  if (options.localAddress)
+    name += options.localAddress;
+  name += ':';
+  return name;
+};
+
+Agent.prototype.addRequest = function(req, options) {
+  // Legacy API: addRequest(req, host, port, path)
+  if (typeof options === 'string') {
+    options = {
+      host: options,
+      port: arguments[2],
+      path: arguments[3]
+    };
+  }
+
+  options = util._extend({}, options);
+  options = util._extend(options, this.options);
+
+  var name = this.getName(options);
+  if (!this.sockets[name]) {
+    this.sockets[name] = [];
+  }
+
+  var freeLen = this.freeSockets[name] ? this.freeSockets[name].length : 0;
+  var sockLen = freeLen + this.sockets[name].length;
+
+  if (freeLen) {
+    // we have a free socket, so use that.
+    var socket = this.freeSockets[name].shift();
+    debug('have free socket');
+
+    socket.removeListener('error', freeSocketErrorListener);
+
+    // restart the default timer
+    socket.setTimeout(this.timeout);
+
+    // don't leak
+    if (!this.freeSockets[name].length)
+      delete this.freeSockets[name];
+
+    socket.ref && socket.ref();
+    req.onSocket(socket);
+    this.sockets[name].push(socket);
+  } else if (sockLen < this.maxSockets) {
+    debug('call onSocket', sockLen, freeLen);
+    // If we are under maxSockets create a new one.
+    req.onSocket(this.createSocket(req, options));
+  } else {
+    debug('wait for socket');
+    // We are over limit so we'll add it to the queue.
+    if (!this.requests[name]) {
+      this.requests[name] = [];
+    }
+    this.requests[name].push(req);
+  }
+};
+
+Agent.prototype.createSocket = function(req, options) {
+  var self = this;
+  options = util._extend({}, options);
+  options = util._extend(options, self.options);
+
+  if (!options.servername) {
+    options.servername = options.host;
+    if (req) {
+      var hostHeader = req.getHeader('host');
+      if (hostHeader) {
+        options.servername = hostHeader.replace(/:.*$/, '');
+      }
+    }
+  }
+
+  var name = self.getName(options);
+
+  debug('createConnection', name, options);
+  options.encoding = null;
+  var s = self.createConnection(options);
+  if (!self.sockets[name]) {
+    self.sockets[name] = [];
+  }
+  this.sockets[name].push(s);
+  debug('sockets', name, this.sockets[name].length);
+
+  function onFree() {
+    self.emit('free', s, options);
+  }
+  s.on('free', onFree);
+
+  function onClose(err) {
+    debug('CLIENT socket onClose');
+    // fix: socket.destroyed always be undefined on 0.10.x
+    if (typeof s.destroyed !== 'boolean') {
+      s.destroyed = true;
+    }
+
+    // This is the only place where sockets get removed from the Agent.
+    // If you want to remove a socket from the pool, just close it.
+    // All socket errors end in a close event anyway.
+    self.removeSocket(s, options);
+    self.emit('close');
+  }
+  s.on('close', onClose);
+
+  function onTimeout() {
+    debug('CLIENT socket onTimeout');
+    s.destroy();
+    // Remove it from freeSockets immediately to prevent new requests from being sent through this socket.
+    self.removeSocket(s, options);
+    self.emit('timeout');
+  }
+  s.on('timeout', onTimeout);
+  // set the default timer
+  s.setTimeout(self.timeout);
+
+  function onRemove() {
+    // We need this function for cases like HTTP 'upgrade'
+    // (defined by WebSockets) where we need to remove a socket from the
+    // pool because it'll be locked up indefinitely
+    debug('CLIENT socket onRemove');
+    self.removeSocket(s, options);
+    s.removeListener('close', onClose);
+    s.removeListener('free', onFree);
+    s.removeListener('agentRemove', onRemove);
+    // remove timer
+    s.setTimeout(0, onTimeout);
+  }
+  s.on('agentRemove', onRemove);
+  return s;
+};
+
+Agent.prototype.removeSocket = function(s, options) {
+  var freeLen, sockLen;
+  var name = this.getName(options);
+  debug('removeSocket', name, 'destroyed:', s.destroyed);
+  var sets = [this.sockets];
+
+  // If the socket was destroyed, remove it from the free buffers too.
+  if (s.destroyed)
+    sets.push(this.freeSockets);
+
+  for (var sk = 0; sk < sets.length; sk++) {
+    var sockets = sets[sk];
+    if (sockets[name]) {
+      var index = sockets[name].indexOf(s);
+      if (index !== -1) {
+        sockets[name].splice(index, 1);
+        // Don't leak
+        if (sockets[name].length === 0)
+          delete sockets[name];
+      }
+    }
+  }
+
+  freeLen = this.freeSockets[name] ? this.freeSockets[name].length : 0;
+  sockLen = freeLen + this.sockets[name] ? this.sockets[name].length : 0;
+
+  if (this.requests[name] && this.requests[name].length && sockLen < this.maxSockets) {
+    debug('removeSocket, have a request, make a socket');
+    var req = this.requests[name][0];
+    // If we have pending requests and a socket gets closed make a new one
+    this.createSocket(req, options).emit('free');
+  }
+};
+
+Agent.prototype.destroy = function() {
+  var sets = [this.freeSockets, this.sockets];
+  for (var s = 0; s < sets.length; s++) {
+    var set = sets[s];
+    var keys = Object.keys(set);
+    for (var v = 0; v < keys.length; v++) {
+      var setName = set[keys[v]];
+      for (var n = 0; n < setName.length; n++) {
+        setName[n].destroy();
+      }
+    }
+  }
+};
+
+exports.globalAgent = new Agent();
diff --git a/node_modules/agentkeepalive/lib/agent.js b/node_modules/agentkeepalive/lib/agent.js
new file mode 100644
index 00000000..ad4917f0
--- /dev/null
+++ b/node_modules/agentkeepalive/lib/agent.js
@@ -0,0 +1,97 @@
+/**
+ * refer:
+ *   * @atimb "Real keep-alive HTTP agent": https://gist.github.com/2963672
+ *   * https://github.com/joyent/node/blob/master/lib/http.js
+ *   * https://github.com/joyent/node/blob/master/lib/https.js
+ *   * https://github.com/joyent/node/blob/master/lib/_http_agent.js
+ *
+ * Copyright(c) 2012 - 2014 fengmk2 <fengmk2@gmail.com>
+ * Copyright(c) node-modules
+ * MIT Licensed
+ */
+
+'use strict';
+
+/**
+ * Module dependencies.
+ */
+
+var https = require('https');
+var utils = require('./utils');
+var OriginalAgent = require('./_http_agent').Agent;
+var OriginalHttpsAgent = https.Agent;
+
+module.exports = Agent;
+
+function Agent(options) {
+  if (!(this instanceof Agent)) {
+    return new Agent(options);
+  }
+
+  options = options || {};
+  options.keepAlive = options.keepAlive !== false;
+  // default is keep-alive and 15s free socket timeout
+  if (options.keepAliveTimeout === undefined) {
+    options.keepAliveTimeout = 15000;
+  }
+  // default timeout is double keepalive timeout
+  if (options.timeout === undefined) {
+    options.timeout = options.keepAliveTimeout * 2;
+  }
+
+  OriginalAgent.call(this, options);
+
+  var self = this;
+  self.createSocketCount = 0;
+  self.closeSocketCount = 0;
+  // socket error event count
+  self.errorSocketCount = 0;
+  self.requestCount = 0;
+  self.timeoutSocketCount = 0;
+  self.on('free', function () {
+    self.requestCount++;
+  });
+  self.on('timeout', function () {
+    self.timeoutSocketCount++;
+  });
+  self.on('close', function () {
+    self.closeSocketCount++;
+  });
+  self.on('error', function () {
+    self.errorSocketCount++;
+  });
+}
+
+utils.inherits(Agent, OriginalAgent);
+
+Agent.prototype.createSocket = function (req, options) {
+  var socket = OriginalAgent.prototype.createSocket.call(this, req, options);
+  if (this.keepAlive) {
+    // Disable Nagle's algorithm: http://blog.caustik.com/2012/04/08/scaling-node-js-to-100k-concurrent-connections/
+    // http://fengmk2.com/benchmark/nagle-algorithm-delayed-ack-mock.html
+    socket.setNoDelay(true);
+  }
+  this.createSocketCount++;
+  return socket;
+};
+
+Agent.prototype.getCurrentStatus = function () {
+  return {
+    createSocketCount: this.createSocketCount,
+    closeSocketCount: this.closeSocketCount,
+    errorSocketCount: this.errorSocketCount,
+    timeoutSocketCount: this.timeoutSocketCount,
+    requestCount: this.requestCount,
+    freeSockets: inspect(this.freeSockets),
+    sockets: inspect(this.sockets),
+    requests: inspect(this.requests)
+  };
+};
+
+function inspect(obj) {
+  var res = {};
+  for (var key in obj) {
+    res[key] = obj[key].length;
+  }
+  return res;
+}
diff --git a/node_modules/agentkeepalive/lib/https_agent.js b/node_modules/agentkeepalive/lib/https_agent.js
new file mode 100644
index 00000000..36b32d66
--- /dev/null
+++ b/node_modules/agentkeepalive/lib/https_agent.js
@@ -0,0 +1,95 @@
+/**
+ * Https Agent base on custom http agent
+ *
+ * Copyright(c) node-modules and other contributors.
+ * MIT Licensed
+ *
+ * Authors:
+ *   fengmk2 <m@fengmk2.com> (http://fengmk2.com)
+ */
+
+'use strict';
+
+/**
+ * Module dependencies.
+ */
+
+var https = require('https');
+var utils = require('./utils');
+var HttpAgent = require('./agent');
+var OriginalHttpsAgent = https.Agent;
+
+var HttpsAgent;
+
+if (utils.isNode10) {
+  // node v0.10
+  HttpsAgent = function HttpsAgent(options) {
+    HttpAgent.call(this, options);
+    this.defaultPort = 443;
+    this.protocol = 'https:';
+  };
+
+  utils.inherits(HttpsAgent, HttpAgent);
+
+  HttpsAgent.prototype.createConnection = https.globalAgent.createConnection;
+  HttpsAgent.prototype.getName = function(options) {
+    var name = HttpAgent.prototype.getName.call(this, options);
+
+    name += ':';
+    if (options.ca)
+      name += options.ca;
+
+    name += ':';
+    if (options.cert)
+      name += options.cert;
+
+    name += ':';
+    if (options.ciphers)
+      name += options.ciphers;
+
+    name += ':';
+    if (options.key)
+      name += options.key;
+
+    name += ':';
+    if (options.pfx)
+      name += options.pfx;
+
+    name += ':';
+    if (options.rejectUnauthorized !== undefined)
+      name += options.rejectUnauthorized;
+
+    return name;
+  };
+} else {
+  HttpsAgent = function HttpsAgent(options) {
+    HttpAgent.call(this, options);
+    this.defaultPort = 443;
+    this.protocol = 'https:';
+    this.maxCachedSessions = this.options.maxCachedSessions;
+    if (this.maxCachedSessions === undefined)
+      this.maxCachedSessions = 100;
+
+    this._sessionCache = {
+      map: {},
+      list: []
+    };
+  };
+
+  utils.inherits(HttpsAgent, HttpAgent);
+
+  [
+    'createConnection',
+    'getName',
+    '_getSession',
+    '_cacheSession',
+    // https://github.com/nodejs/node/pull/4982
+    '_evictSession',
+  ].forEach(function(method) {
+    if (typeof OriginalHttpsAgent.prototype[method] === 'function') {
+      HttpsAgent.prototype[method] = OriginalHttpsAgent.prototype[method];
+    }
+  });
+}
+
+module.exports = HttpsAgent;
diff --git a/node_modules/agentkeepalive/lib/utils.js b/node_modules/agentkeepalive/lib/utils.js
new file mode 100644
index 00000000..7f79f9c1
--- /dev/null
+++ b/node_modules/agentkeepalive/lib/utils.js
@@ -0,0 +1,31 @@
+/**
+ * Copyright(c) node-modules and other contributors.
+ * MIT Licensed
+ *
+ * Authors:
+ *   fengmk2 <m@fengmk2.com> (http://fengmk2.com)
+ */
+
+'use strict';
+
+/**
+ * Module dependencies.
+ */
+
+var util = require('util');
+var debug;
+var node10 = process.version.indexOf('v0.10.') === 0;
+
+if (node10) {
+  debug = function () {
+    if (process.env.NODE_DEBUG && /agentkeepalive/.test(process.env.NODE_DEBUG)) {
+      console.log.apply(console.log, arguments);
+    }
+  };
+} else {
+  debug = util.debuglog('agentkeepalive');
+}
+
+exports.debug = debug;
+exports.isNode10 = node10;
+exports.inherits = util.inherits;