diff --git a/Makefile b/Makefile
index b411e8dd..a9fbd0ee 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,6 @@ test:
 		$(TESTS)
 
 test-cov:
-	@$(MAKE) test REPORTER=dot
 	@$(MAKE) test MOCHA_OPTS='--require blanket' REPORTER=html-cov > coverage.html
 	@$(MAKE) test MOCHA_OPTS='--require blanket' REPORTER=travis-cov
 
diff --git a/index.js b/index.js
index ba85520e..ba111b50 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,21 @@
 var wechat = require('./lib/wechat');
 wechat.List = require('./lib/list');
-wechat.API = require('./lib/common');
+var API = require('./lib/api_common');
+// 菜单接口
+API.mixin(require('./lib/api_menu'));
+// 分组管理
+API.mixin(require('./lib/api_group'));
+// 用户信息
+API.mixin(require('./lib/api_user'));
+// 二维码
+API.mixin(require('./lib/api_qrcode'));
+// 客服消息
+API.mixin(require('./lib/api_customer'));
+// 媒体管理（上传、下载）
+API.mixin(require('./lib/api_media'));
+// 支付接口
+API.mixin(require('./lib/api_pay'));
+wechat.API = API;
 wechat.OAuth = require('./lib/oauth');
+wechat.util = require('./lib/util');
 module.exports = wechat;
diff --git a/lib/api_common.js b/lib/api_common.js
new file mode 100644
index 00000000..b8cc994b
--- /dev/null
+++ b/lib/api_common.js
@@ -0,0 +1,142 @@
+var inherits = require('util').inherits;
+var EventEmitter = require('events').EventEmitter;
+var urllib = require('urllib');
+var util = require('./util');
+var wrapper = util.wrapper;
+
+var AccessToken = function (accessToken, expireTime) {
+  if (!(this instanceof AccessToken)) {
+    return new AccessToken(accessToken, expireTime);
+  }
+  this.accessToken = accessToken;
+  this.expireTime = expireTime;
+};
+
+/**
+ * 检查AccessToken是否有效，检查规则为当前时间和过期时间进行对比
+ *
+ * Examples:
+ * ```
+ * api.isAccessTokenValid();
+ * ```
+ */
+AccessToken.prototype.isValid = function () {
+  return !!this.accessToken && (new Date().getTime()) < this.expireTime;
+};
+
+/**
+ * 根据appid和appsecret创建API的构造函数
+ *
+ * Examples:
+ * ```
+ * var API = require('wechat').API;
+ * var api = new API('appid', 'secret');
+ * api.on('token', function (token) {
+ *   // 请将token存储到全局，跨进程级别的全局
+ *   // 比如写到数据库、redis等
+ *   // 这样才能在cluster模式下使用
+ * });
+ * // 或者
+ * getTokenFromGlobal(function (token) {
+ *   // var api = new API('appid', 'secret', token);
+ * });
+ * ```
+ * @param {String} appid 在公众平台上申请得到的appid
+ * @param {String} appsecret 在公众平台上申请得到的app secret
+ * @param {Object} token 可选的。全局token对象，该对象在调用一次`getAccessToken`后得到
+ */
+var API = function (appid, appsecret, token) {
+  this.appid = appid;
+  this.appsecret = appsecret;
+  if (token) {
+    this.token = AccessToken(token.accessToken, token.expireTime);
+  }
+  this.prefix = 'https://api.weixin.qq.com/cgi-bin/';
+  this.mpPrefix = 'https://mp.weixin.qq.com/cgi-bin/';
+  this.fileServerPrefix = 'http://file.api.weixin.qq.com/cgi-bin/';
+  this.payPrefix = 'https://api.weixin.qq.com/pay/';
+  EventEmitter.call(this);
+};
+inherits(API, EventEmitter);
+
+/**
+ * 根据创建API时传入的appid和appsecret获取access token
+ * 进行后续所有API调用时，需要先获取access token
+ * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=获取access_token>
+ *
+ * Examples:
+ * ```
+ * api.getAccessToken(callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 获取access token出现异常时的异常对象
+ * - `result`, 成功时得到的响应结果
+ *
+ * Result:
+ * ```
+ * {"access_token": "ACCESS_TOKEN","expires_in": 7200}
+ * ```
+ * @param {Function} callback 回调函数
+ */
+API.prototype.getAccessToken = function (callback) {
+  var that = this;
+  var url = this.prefix + 'token?grant_type=client_credential&appid=' + this.appid + '&secret=' + this.appsecret;
+  urllib.request(url, {dataType: 'json'}, wrapper(function (err, data) {
+    if (err) {
+      return callback(err);
+    }
+    // 过期时间，因网络延迟等，将实际过期时间提前10秒，以防止临界点
+    var expireTime = (new Date().getTime()) + (data.expires_in - 10) * 1000;
+    that.token = AccessToken(data.access_token, expireTime);
+    that.emit('token', that.token);
+    callback(err, that.token);
+  }));
+  return this;
+};
+
+/**
+ * 需要access token的接口调用如果采用preRequest进行封装后，就可以直接调用
+ * 无需依赖getAccessToken为前置调用
+ *
+ * @param {Function} method 需要封装的方法
+ * @param {Array} args 方法需要的参数
+ */
+API.prototype.preRequest = function (method, args) {
+  var that = this;
+  var callback = args[args.length - 1];
+  if (that.token && that.token.isValid()) {
+    method.apply(that, args);
+  } else {
+    that.getAccessToken(function (err, data) {
+      // 如遇错误，通过回调函数传出
+      if (err) {
+        callback(err, data);
+        return;
+      }
+      method.apply(that, args);
+    });
+  }
+};
+
+/**
+ * 用于支持对象合并。将对象合并到API.prototype上，使得能够支持扩展
+ * Examples:
+ * ```
+ * // 媒体管理（上传、下载）
+ * API.mixin(require('./lib/api_media'));
+ * ```
+ * @param {Object} obj 要合并的对象
+ */
+API.mixin = function (obj) {
+  for (var key in obj) {
+    if (obj.hasOwnProperty(key)) {
+      if (API.prototype.hasOwnProperty(key)) {
+        throw new Error('Don\'t allow override existed prototype method.');
+      }
+      API.prototype[key] = obj[key];
+    }
+  }
+};
+
+module.exports = API;
diff --git a/lib/api_customer.js b/lib/api_customer.js
new file mode 100644
index 00000000..db18b25c
--- /dev/null
+++ b/lib/api_customer.js
@@ -0,0 +1,293 @@
+var urllib = require('urllib');
+var util = require('./util');
+var wrapper = util.wrapper;
+var postJSON = util.postJSON;
+
+/**
+ * 客服消息，发送文字消息
+ * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
+ * Examples:
+ * ```
+ * api.sendText('openid', 'Hello world', callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * @param {String} openid 用户的openid
+ * @param {String} text 发送的消息内容
+ * @param {Function} callback 回调函数
+ */
+exports.sendText = function (openid, text, callback) {
+  this.preRequest(this._sendText, arguments);
+};
+
+/*!
+ * 客服消息，发送文字消息的未封装版本
+ */
+exports._sendText = function (openid, text, callback) {
+  // {
+  //  "touser":"OPENID",
+  //  "msgtype":"text",
+  //  "text": {
+  //    "content":"Hello World"
+  //  }
+  // }
+  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
+  var data = {
+    "touser": openid,
+    "msgtype": "text",
+    "text": {
+      "content": text
+    }
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 客服消息，发送图片消息
+ * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
+ * Examples:
+ * ```
+ * api.sendImage('openid', 'media_id', callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * @param {String} openid 用户的openid
+ * @param {String} mediaId 媒体文件的ID，参见uploadMedia方法
+ * @param {Function} callback 回调函数
+ */
+exports.sendImage = function (openid, mediaId, callback) {
+  this.preRequest(this._sendImage, arguments);
+};
+
+/*!
+ * 客服消息，发送图片消息的未封装版本
+ */
+exports._sendImage = function (openid, mediaId, callback) {
+  // {
+  //  "touser":"OPENID",
+  //  "msgtype":"image",
+  //  "image": {
+  //    "media_id":"MEDIA_ID"
+  //  }
+  // }
+  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
+  var data = {
+    "touser": openid,
+    "msgtype":"image",
+    "image": {
+      "media_id": mediaId
+    }
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 客服消息，发送语音消息
+ * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
+ * Examples:
+ * ```
+ * api.sendVoice('openid', 'media_id', callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * @param {String} openid 用户的openid
+ * @param {String} mediaId 媒体文件的ID
+ * @param {Function} callback 回调函数
+ */
+exports.sendVoice = function (openid, mediaId, callback) {
+  this.preRequest(this._sendVoice, arguments);
+};
+
+/*!
+ * 客服消息，发送语音消息的未封装版本
+ */
+exports._sendVoice = function (openid, mediaId, callback) {
+  // {
+  //  "touser":"OPENID",
+  //  "msgtype":"voice",
+  //  "voice": {
+  //    "media_id":"MEDIA_ID"
+  //  }
+  // }
+  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
+  var data = {
+    "touser": openid,
+    "msgtype": "voice",
+    "voice": {
+      "media_id": mediaId
+    }
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 客服消息，发送视频消息
+ * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
+ * Examples:
+ * ```
+ * api.sendVideo('openid', 'media_id', 'thumb_media_id', callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * @param {String} openid 用户的openid
+ * @param {String} mediaId 媒体文件的ID
+ * @param {String} thumbMediaId 缩略图文件的ID
+ * @param {Function} callback 回调函数
+ */
+exports.sendVideo = function (openid, mediaId, thumbMediaId, callback) {
+  this.preRequest(this._sendVideo, arguments);
+};
+
+/*!
+ * 客服消息，发送视频消息的未封装版本
+ */
+exports._sendVideo = function (openid, mediaId, thumbMediaId, callback) {
+  // {
+  //  "touser":"OPENID",
+  //  "msgtype":"video",
+  //  "image": {
+  //    "media_id":"MEDIA_ID"
+  //    "thumb_media_id":"THUMB_MEDIA_ID"
+  //  }
+  // }
+  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
+  var data = {
+    "touser": openid,
+    "msgtype":"video",
+    "video": {
+      "media_id": mediaId,
+      "thumb_media_id": thumbMediaId
+    }
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 客服消息，发送音乐消息
+ * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
+ * Examples:
+ * ```
+ * var music = {
+ *  title: '音乐标题', // 可选
+ *  description: '描述内容', // 可选
+ *  musicurl: 'http://url.cn/xxx', 音乐文件地址
+ *  hqmusicurl: "HQ_MUSIC_URL",
+ *  thumb_media_id: "THUMB_MEDIA_ID"
+ * };
+ * api.sendMusic('openid', music, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * @param {String} openid 用户的openid
+ * @param {Object} music 音乐文件
+ * @param {Function} callback 回调函数
+ */
+exports.sendMusic = function (openid, music, callback) {
+  this.preRequest(this._sendMusic, arguments);
+};
+
+/*!
+ * 客服消息，发送音乐消息的未封装版本
+ */
+exports._sendMusic = function (openid, music, callback) {
+  // {
+  //  "touser":"OPENID",
+  //  "msgtype":"music",
+  //  "music": {
+  //    "title":"MUSIC_TITLE", // 可选
+  //    "description":"MUSIC_DESCRIPTION", // 可选
+  //    "musicurl":"MUSIC_URL",
+  //    "hqmusicurl":"HQ_MUSIC_URL",
+  //    "thumb_media_id":"THUMB_MEDIA_ID"
+  //  }
+  // }
+  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
+  var data = {
+    "touser": openid,
+    "msgtype":"music",
+    "music": music
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 客服消息，发送图文消息
+ * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
+ * Examples:
+ * ```
+ * var articles = [
+ *  {
+ *    "title":"Happy Day",
+ *    "description":"Is Really A Happy Day",
+ *    "url":"URL",
+ *    "picurl":"PIC_URL"
+ *  },
+ *  {
+ *    "title":"Happy Day",
+ *    "description":"Is Really A Happy Day",
+ *    "url":"URL",
+ *    "picurl":"PIC_URL"
+ *  }];
+ * api.sendNews('openid', articles, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * @param {String} openid 用户的openid
+ * @param {Array} articles 图文列表
+ * @param {Function} callback 回调函数
+ */
+exports.sendNews = function (openid, articles, callback) {
+  this.preRequest(this._sendNews, arguments);
+};
+
+/*!
+ * 客服消息，发送图文消息的未封装版本
+ */
+exports._sendNews = function (openid, articles, callback) {
+  // {
+  //  "touser":"OPENID",
+  //  "msgtype":"news",
+  //  "news":{
+  //    "articles": [
+  //      {
+  //        "title":"Happy Day",
+  //        "description":"Is Really A Happy Day",
+  //        "url":"URL",
+  //        "picurl":"PIC_URL"
+  //      },
+  //      {
+  //        "title":"Happy Day",
+  //        "description":"Is Really A Happy Day",
+  //        "url":"URL",
+  //        "picurl":"PIC_URL"
+  //      }]
+  //   }
+  // }
+  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
+  var data = {
+    "touser": openid,
+    "msgtype":"news",
+    "news": {
+      "articles": articles
+    }
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
diff --git a/lib/api_group.js b/lib/api_group.js
new file mode 100644
index 00000000..6dde3fef
--- /dev/null
+++ b/lib/api_group.js
@@ -0,0 +1,193 @@
+var urllib = require('urllib');
+var util = require('./util');
+var wrapper = util.wrapper;
+var postJSON = util.postJSON;
+
+/**
+ * 获取分组列表
+ * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
+ * Examples:
+ * ```
+ * api.getGroups(callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {
+ *  "groups": [
+ *    {"id": 0, "name": "未分组", "count": 72596},
+ *    {"id": 1, "name": "黑名单", "count": 36}
+ *  ]
+ * }
+ * ```
+ * @param {Function} callback 回调函数
+ */
+exports.getGroups = function (callback) {
+  this.preRequest(this._getGroups, arguments);
+};
+
+/*!
+ * 获取分组列表的未封装版本
+ */
+exports._getGroups = function (callback) {
+  // https://api.weixin.qq.com/cgi-bin/groups/get?access_token=ACCESS_TOKEN
+  var url = this.prefix + 'groups/get?access_token=' + this.token.accessToken;
+  urllib.request(url, {dataType: 'json'}, wrapper(callback));
+};
+
+/**
+ * 查询用户在哪个分组
+ * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
+ * Examples:
+ * ```
+ * api.getWhichGroup(openid, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {
+ *  "groupid": 102
+ * }
+ * ```
+ * @param {String} openid Open ID
+ * @param {Function} callback 回调函数
+ */
+exports.getWhichGroup = function (openid, callback) {
+  this.preRequest(this._getWhichGroup, arguments);
+};
+
+/*!
+ * 查询用户在哪个分组未分组版本
+ */
+exports._getWhichGroup = function (openid, callback) {
+  // https://api.weixin.qq.com/cgi-bin/groups/getid?access_token=ACCESS_TOKEN
+  var url = this.prefix + 'groups/getid?access_token=' + this.token.accessToken;
+  var data = {
+    "openid": openid
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 创建分组
+ * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
+ * Examples:
+ * ```
+ * api.createGroup('groupname', callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {"group": {"id": 107, "name": "test"}}
+ * ```
+ * @param {String} name 分组名字
+ * @param {Function} callback 回调函数
+ */
+exports.createGroup = function (name, callback) {
+  this.preRequest(this._createGroup, arguments);
+};
+
+/*!
+ * 创建分组的未封装版本
+ */
+exports._createGroup = function (name, callback) {
+  // https://api.weixin.qq.com/cgi-bin/groups/create?access_token=ACCESS_TOKEN
+  // POST数据格式：json
+  // POST数据例子：{"group":{"name":"test"}}
+  var url = this.prefix + 'groups/create?access_token=' + this.token.accessToken;
+  var data = {
+    "group": {"name": name}
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 更新分组名字
+ * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
+ * Examples:
+ * ```
+ * api.updateGroup(107, 'new groupname', callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {"errcode": 0, "errmsg": "ok"}
+ * ```
+ * @param {Number} id 分组ID
+ * @param {String} name 新的分组名字
+ * @param {Function} callback 回调函数
+ */
+exports.updateGroup = function (id, name, callback) {
+  this.preRequest(this._updateGroup, arguments);
+};
+
+/*!
+ * 更新分组名字的未封装版本
+ */
+exports._updateGroup = function (id, name, callback) {
+  // http请求方式: POST（请使用https协议）
+  // https://api.weixin.qq.com/cgi-bin/groups/update?access_token=ACCESS_TOKEN
+  // POST数据格式：json
+  // POST数据例子：{"group":{"id":108,"name":"test2_modify2"}}
+  var url = this.prefix + 'groups/update?access_token=' + this.token.accessToken;
+  var data = {
+    "group": {"id": id, "name": name}
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 移动用户进分组
+ * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
+ * Examples:
+ * ```
+ * api.moveUserToGroup(openid, groupId, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {"errcode": 0, "errmsg": "ok"}
+ * ```
+ * @param {String} openid 用户的openid
+ * @param {Number} groupId 分组ID
+ * @param {Function} callback 回调函数
+ */
+exports.moveUserToGroup = function (openid, groupId, callback) {
+  this.preRequest(this._moveUserToGroup, arguments);
+};
+
+/*!
+ * 移动用户进分组的未封装版本
+ */
+exports._moveUserToGroup = function (openid, groupId, callback) {
+  // http请求方式: POST（请使用https协议）
+  // https://api.weixin.qq.com/cgi-bin/groups/members/update?access_token=ACCESS_TOKEN
+  // POST数据格式：json
+  // POST数据例子：{"openid":"oDF3iYx0ro3_7jD4HFRDfrjdCM58","to_groupid":108}
+  var url = this.prefix + 'groups/members/update?access_token=' + this.token.accessToken;
+  var data = {
+    "openid": openid,
+    "to_groupid": groupId
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
diff --git a/lib/api_media.js b/lib/api_media.js
new file mode 100644
index 00000000..d115a186
--- /dev/null
+++ b/lib/api_media.js
@@ -0,0 +1,114 @@
+var path = require('path');
+var fs = require('fs');
+var urllib = require('urllib');
+var formstream = require('formstream');
+var wrapper = require('./util').wrapper;
+
+/**
+ * 上传多媒体文件，分别有图片（image）、语音（voice）、视频（video）和缩略图（thumb）
+ * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=上传下载多媒体文件>
+ * Examples:
+ * ```
+ * api.uploadMedia('filepath', type, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {"type":"TYPE","media_id":"MEDIA_ID","created_at":123456789}
+ * ```
+ * Shortcut:
+ *
+ * - `exports.uploadImage(filepath, callback);`
+ * - `exports.uploadVoice(filepath, callback);`
+ * - `exports.uploadVideo(filepath, callback);`
+ * - `exports.uploadThumb(filepath, callback);`
+ *
+ * @param {String} filepath 文件路径
+ * @param {String} type 媒体类型，可用值有image、voice、video、thumb
+ * @param {Function} callback 回调函数
+ */
+exports.uploadMedia = function (filepath, type, callback) {
+  this.preRequest(this._uploadMedia, arguments);
+};
+
+/*!
+ * 上传多媒体文件的未封装版本
+ */
+exports._uploadMedia = function (filepath, type, callback) {
+  var that = this;
+  fs.stat(filepath, function (err, stat) {
+    if (err) {
+      return callback(err);
+    }
+    var form = formstream();
+    form.file('media', filepath, path.basename(filepath), stat.size);
+    var url = that.fileServerPrefix + 'media/upload?access_token=' + that.token.accessToken + '&type=' + type;
+    var opts = {
+      dataType: 'json',
+      type: 'POST',
+      timeout: 60000, // 60秒超时
+      headers: form.headers(),
+      stream: form
+    };
+    urllib.request(url, opts, wrapper(callback));
+  });
+};
+
+['image', 'voice', 'video', 'thumb'].forEach(function (type) {
+  var method = 'upload' + type[0].toUpperCase() + type.substring(1);
+  exports[method] = function (filepath, callback) {
+    this.uploadMedia(filepath, type, callback);
+  };
+});
+
+/**
+ * 根据媒体ID获取媒体内容
+ * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=上传下载多媒体文件>
+ * Examples:
+ * ```
+ * api.getMedia('media_id', callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的文件Buffer对象
+ * - `res`, HTTP响应对象
+ *
+ * @param {String} mediaId 媒体文件的ID
+ * @param {Function} callback 回调函数
+ */
+exports.getMedia = function (mediaId, callback) {
+  this.preRequest(this._getMedia, arguments);
+};
+
+/*!
+ * 上传多媒体文件的未封装版本
+ */
+exports._getMedia = function (mediaId, callback) {
+  var url = this.fileServerPrefix + 'media/get?access_token=' + this.token.accessToken + '&media_id=' + mediaId;
+  urllib.request(url, {}, wrapper(function (err, data, res) {
+    // 不用处理err，因为wrapper函数处理过
+    var contentType = res.headers['content-type'];
+    if (contentType === 'application/json') {
+      var ret;
+      try {
+        ret = JSON.parse(data);
+        if (ret.errcode) {
+          err = new Error(ret.errmsg);
+          err.name = 'WeChatAPIError';
+        }
+      } catch (ex) {
+        callback(ex, data, res);
+        return;
+      }
+      callback(err, ret, res);
+    } else {
+      // 输出Buffer对象
+      callback(null, data, res);
+    }
+  }));
+};
diff --git a/lib/api_menu.js b/lib/api_menu.js
new file mode 100644
index 00000000..0597779d
--- /dev/null
+++ b/lib/api_menu.js
@@ -0,0 +1,137 @@
+var urllib = require('urllib');
+var util = require('./util');
+var wrapper = util.wrapper;
+var postJSON = util.postJSON;
+
+/**
+ * 创建自定义菜单
+ * 详细请看：http://mp.weixin.qq.com/wiki/index.php?title=自定义菜单创建接口
+ *
+ * Menu:
+ * ```
+ * {
+ *  "button":[
+ *    {
+ *      "type":"click",
+ *      "name":"今日歌曲",
+ *      "key":"V1001_TODAY_MUSIC"
+ *    },
+ *    {
+ *      "name":"菜单",
+ *      "sub_button":[
+ *        {
+ *          "type":"view",
+ *          "name":"搜索",
+ *          "url":"http://www.soso.com/"
+ *        },
+ *        {
+ *          "type":"click",
+ *          "name":"赞一下我们",
+ *          "key":"V1001_GOOD"
+ *        }]
+ *      }]
+ *    }
+ *  ]
+ * }
+ * ```
+ * Examples:
+ * ```
+ * api.createMenu(menu, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {"errcode":0,"errmsg":"ok"}
+ * ```
+ * @param {Object} menu 菜单对象
+ * @param {Function} callback 回调函数
+ */
+exports.createMenu = function (menu, callback) {
+  this.preRequest(this._createMenu, arguments);
+};
+
+/*!
+ * 创建自定义菜单的未封装版本
+ */
+exports._createMenu = function (menu, callback) {
+  var url = this.prefix + 'menu/create?access_token=' + this.token.accessToken;
+  urllib.request(url, postJSON(menu), wrapper(callback));
+};
+
+/**
+ * 获取菜单
+ * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=自定义菜单查询接口>
+ *
+ * Examples:
+ * ```
+ * api.getMenu(callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * // 结果示例
+ * {
+ *  "menu": {
+ *    "button":[
+ *      {"type":"click","name":"今日歌曲","key":"V1001_TODAY_MUSIC","sub_button":[]},
+ *      {"type":"click","name":"歌手简介","key":"V1001_TODAY_SINGER","sub_button":[]},
+ *      {"name":"菜单","sub_button":[
+ *        {"type":"view","name":"搜索","url":"http://www.soso.com/","sub_button":[]},
+ *        {"type":"view","name":"视频","url":"http://v.qq.com/","sub_button":[]},
+ *        {"type":"click","name":"赞一下我们","key":"V1001_GOOD","sub_button":[]}]
+ *      }
+ *    ]
+ *  }
+ * }
+ * ```
+ * @param {Function} callback 回调函数
+ */
+exports.getMenu = function (callback) {
+  this.preRequest(this._getMenu, arguments);
+};
+
+/*!
+ * 获取自定义菜单的未封装版本
+ */
+exports._getMenu = function (callback) {
+  var url = this.prefix + 'menu/get?access_token=' + this.token.accessToken;
+  urllib.request(url, {dataType: 'json'}, wrapper(callback));
+};
+
+/**
+ * 删除自定义菜单
+ * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=自定义菜单删除接口>
+ * Examples:
+ * ```
+ * api.removeMenu(callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {"errcode":0,"errmsg":"ok"}
+ * ```
+ * @param {Function} callback 回调函数
+ */
+exports.removeMenu = function (callback) {
+  this.preRequest(this._removeMenu, arguments);
+};
+
+/*!
+ * 删除自定义菜单的未封装版本
+ */
+exports._removeMenu = function (callback) {
+  var url = this.prefix + 'menu/delete?access_token=' + this.token.accessToken;
+  urllib.request(url, {dataType: 'json'}, wrapper(callback));
+};
diff --git a/lib/api_pay.js b/lib/api_pay.js
new file mode 100644
index 00000000..7f9e8bdf
--- /dev/null
+++ b/lib/api_pay.js
@@ -0,0 +1,120 @@
+var urllib = require('urllib');
+var util = require('./util');
+var wrapper = util.wrapper;
+var postJSON = util.postJSON;
+
+/**
+ * 微信公众号支付: 发货通知
+ * 详情请见：<http://mp.weixin.qq.com/htmledition/res/bussiness-faq/wx_mp_pay.zip> 接口文档订单发货通知
+ *
+ * Package:
+ * ```
+ * {
+ *   "appid" : "wwwwb4f85f3a797777",
+ *   "openid" : "oX99MDgNcgwnz3zFN3DNmo8uwa-w",
+ *   "transid" : "111112222233333",
+ *   "out_trade_no" : "555666uuu",
+ *   "deliver_timestamp" : "1369745073",
+ *   "deliver_status" : "1",
+ *   "deliver_msg" : "ok",
+ *   "app_signature" : "53cca9d47b883bd4a5c85a9300df3da0cb48565c",
+ *   "sign_method" : "sha1"
+ * }
+ * ```
+ * Examples:
+ * ```
+ * api.deliverNotify(package, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {"errcode":0,"errmsg":"ok"}
+ * ```
+ *
+ * @param {Object} package package对象
+ * @param {Function} callback 回调函数
+ */
+exports.deliverNotify = function (package, callback) {
+  this.preRequest(this._deliverNotify, arguments);
+};
+
+/*!
+ * 发货通知的未封装版本
+ */
+exports._deliverNotify = function (package, callback) {
+  var url = this.payPrefix + 'delivernotify?access_token=' + this.token.accessToken;
+  urllib.request(url, postJSON(package), wrapper(callback));
+};
+
+/**
+ * 微信公众号支付: 订单查询
+ * 详情请见：<http://mp.weixin.qq.com/htmledition/res/bussiness-faq/wx_mp_pay.zip> 接口文档订单查询部分
+ *
+ * Package:
+ * ```
+ * {
+ *   "appid" : "wwwwb4f85f3a797777",
+ *   "package" : "out_trade_no=11122&partner=1900090055&sign=4e8d0df3da0c3d0df38f",
+ *   "timestamp" : "1369745073",
+ *   "app_signature" : "53cca9d47b883bd4a5c85a9300df3da0cb48565c",
+ *   "sign_method" : "sha1"
+ * }
+ * ```
+ * Examples:
+ * ```
+ * api.orderQuery(query, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {
+ *   "errcode":0,
+ *   "errmsg":"ok",
+ *   "order_info":
+ *   {
+ *     "ret_code":0,
+ *     "ret_msg":"",
+ *     "input_charset":"GBK",
+ *     "trade_state":"0",
+ *     "trade_mode":"1",
+ *     "partner":"1900000109",
+ *     "bank_type":"CMB_FP",
+ *     "bank_billno":"207029722724",
+ *     "total_fee":"1",
+ *     "fee_type":"1",
+ *     "transaction_id":"1900000109201307020305773741",
+ *     "out_trade_no":"2986872580246457300",
+ *     "is_split":"false",
+ *     "is_refund":"false",
+ *     "attach":"",
+ *     "time_end":"20130702175943",
+ *     "transport_fee":"0",
+ *     "product_fee":"1",
+ *     "discount":"0",
+ *     "rmb_total_fee":""
+ *   }
+ * }
+ * ```
+ *
+ * @param {Object} query query对象
+ * @param {Function} callback 回调函数
+ */
+exports.orderQuery = function (query, callback) {
+  this.preRequest(this._orderQuery, arguments);
+};
+
+/*!
+ * 发货通知的未封装版本
+ */
+exports._orderQuery = function (query, callback) {
+  var url = this.payPrefix + 'orderquery?access_token=' + this.token.accessToken;
+  urllib.request(url, postJSON(query), wrapper(callback));
+};
diff --git a/lib/api_qrcode.js b/lib/api_qrcode.js
new file mode 100644
index 00000000..fe3c857d
--- /dev/null
+++ b/lib/api_qrcode.js
@@ -0,0 +1,95 @@
+var urllib = require('urllib');
+var util = require('./util');
+var wrapper = util.wrapper;
+var postJSON = util.postJSON;
+
+/**
+ * 创建临时二维码
+ * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=生成带参数的二维码>
+ * Examples:
+ * ```
+ * api.createTmpQRCode(10000, 1800, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {
+ *  "ticket":"gQG28DoAAAAAAAAAASxodHRwOi8vd2VpeGluLnFxLmNvbS9xL0FuWC1DNmZuVEhvMVp4NDNMRnNRAAIEesLvUQMECAcAAA==",
+ *  "expire_seconds":1800
+ * }
+ * ```
+ * @param {Number} sceneId 场景ID
+ * @param {Number} expire 过期时间，单位秒。最大不超过1800
+ * @param {Function} callback 回调函数
+ */
+exports.createTmpQRCode = function (sceneId, expire, callback) {
+  this.preRequest(this._createTmpQRCode, arguments);
+};
+
+/*!
+ * 创建临时二维码的未封装版本
+ */
+exports._createTmpQRCode = function (sceneId, expire, callback) {
+  var url = this.prefix + 'qrcode/create?access_token=' + this.token.accessToken;
+  var data = {
+    "expire_seconds": expire,
+    "action_name": "QR_SCENE",
+    "action_info": {"scene": {"scene_id": sceneId}}
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 创建永久二维码
+ * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=生成带参数的二维码>
+ * Examples:
+ * ```
+ * api.createLimitQRCode(100, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {
+ *  "ticket":"gQG28DoAAAAAAAAAASxodHRwOi8vd2VpeGluLnFxLmNvbS9xL0FuWC1DNmZuVEhvMVp4NDNMRnNRAAIEesLvUQMECAcAAA=="
+ * }
+ * ```
+ * @param {Number} sceneId 场景ID。ID不能大于100000
+ * @param {Function} callback 回调函数
+ */
+exports.createLimitQRCode = function (sceneId, callback) {
+  this.preRequest(this._createLimitQRCode, arguments);
+};
+
+/*!
+ * 创建永久二维码的未封装版本
+ */
+exports._createLimitQRCode = function (sceneId, callback) {
+  var url = this.prefix + 'qrcode/create?access_token=' + this.token.accessToken;
+  var data = {
+    "action_name": "QR_LIMIT_SCENE",
+    "action_info": {"scene": {"scene_id": sceneId}}
+  };
+  urllib.request(url, postJSON(data), wrapper(callback));
+};
+
+/**
+ * 生成显示二维码的链接。微信扫描后，可立即进入场景
+ * Examples:
+ * ```
+ * api.showQRCodeURL(titck);
+ * // => https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=TICKET
+ * ```
+ * @param {String} ticket 二维码Ticket
+ * @return {String} 显示二维码的URL地址，通过img标签可以显示出来
+ */
+exports.showQRCodeURL = function (ticket) {
+  return this.mpPrefix + 'showqrcode?ticket=' + ticket;
+};
diff --git a/lib/api_user.js b/lib/api_user.js
new file mode 100644
index 00000000..8ca3386f
--- /dev/null
+++ b/lib/api_user.js
@@ -0,0 +1,92 @@
+var urllib = require('urllib');
+var util = require('./util');
+var wrapper = util.wrapper;
+
+/**
+ * 获取用户基本信息
+ * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=获取用户基本信息>
+ * Examples:
+ * ```
+ * api.getUser(openid, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {
+ *  "subscribe": 1,
+ *  "openid": "o6_bmjrPTlm6_2sgVt7hMZOPfL2M",
+ *  "nickname": "Band",
+ *  "sex": 1,
+ *  "language": "zh_CN",
+ *  "city": "广州",
+ *  "province": "广东",
+ *  "country": "中国",
+ *  "headimgurl": "http://wx.qlogo.cn/mmopen/g3MonUZtNHkdmzicIlibx6iaFqAc56vxLSUfpb6n5WKSYVY0ChQKkiaJSgQ1dZuTOgvLLrhJbERQQ4eMsv84eavHiaiceqxibJxCfHe/0",
+ *  "subscribe_time": 1382694957
+ * }
+ * ```
+ * @param {String} openid 用户的openid
+ * @param {Function} callback 回调函数
+ */
+exports.getUser = function (openid, callback) {
+  this.preRequest(this._getUser, arguments);
+};
+
+/*!
+ * 获取用户基本信息的未封装版本
+ */
+exports._getUser = function (openid, callback) {
+  // https://api.weixin.qq.com/cgi-bin/user/info?access_token=ACCESS_TOKEN&openid=OPENID
+  var url = this.prefix + 'user/info?openid=' + openid + '&access_token=' + this.token.accessToken;
+  urllib.request(url, {dataType: 'json'}, wrapper(callback));
+};
+
+/**
+ * 获取关注者列表
+ * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=获取关注者列表
+ * Examples:
+ * ```
+ * api.getFollowers(callback);
+ * // or
+ * api.getFollowers(nextOpenid, callback);
+ * ```
+ * Callback:
+ *
+ * - `err`, 调用失败时得到的异常
+ * - `result`, 调用正常时得到的对象
+ *
+ * Result:
+ * ```
+ * {
+ *  "total":2,
+ *  "count":2,
+ *  "data":{
+ *    "openid":["","OPENID1","OPENID2"]
+ *  },
+ *  "next_openid":"NEXT_OPENID"
+ * }
+ * ```
+ * @param {String} nextOpenid 调用一次之后，传递回来的nextOpenid。第一次获取时可不填
+ * @param {Function} callback 回调函数
+ */
+exports.getFollowers = function (nextOpenid, callback) {
+  this.preRequest(this._getFollowers, arguments);
+};
+
+/*!
+ * 获取关注者列表的未封装版本
+ */
+exports._getFollowers = function (nextOpenid, callback) {
+  // https://api.weixin.qq.com/cgi-bin/user/get?access_token=ACCESS_TOKEN&next_openid=NEXT_OPENID
+  if (typeof nextOpenid === 'function') {
+    callback = nextOpenid;
+    nextOpenid = '';
+  }
+  var url = this.prefix + 'user/get?next_openid=' + nextOpenid + '&access_token=' + this.token.accessToken;
+  urllib.request(url, {dataType: 'json'}, wrapper(callback));
+};
+
diff --git a/lib/common.js b/lib/common.js
deleted file mode 100644
index 8e8d89b9..00000000
--- a/lib/common.js
+++ /dev/null
@@ -1,1141 +0,0 @@
-var path = require('path');
-var fs = require('fs');
-var inherits = require('util').inherits;
-var EventEmitter = require('events').EventEmitter;
-var urllib = require('urllib');
-var formstream = require('formstream');
-var util = require('./util');
-var wrapper = util.wrapper;
-var postJSON = util.postJSON;
-
-var AccessToken = function (accessToken, expireTime) {
-  if (!(this instanceof AccessToken)) {
-    return new AccessToken(accessToken, expireTime);
-  }
-  this.accessToken = accessToken;
-  this.expireTime = expireTime;
-};
-
-/**
- * 检查AccessToken是否有效，检查规则为当前时间和过期时间进行对比
- *
- * Examples:
- * ```
- * api.isAccessTokenValid();
- * ```
- */
-AccessToken.prototype.isValid = function () {
-  return !!this.accessToken && (new Date().getTime()) < this.expireTime;
-};
-
-/**
- * 根据appid和appsecret创建API的构造函数
- *
- * Examples:
- * ```
- * var API = require('wechat').API;
- * var api = new API('appid', 'secret');
- * api.on('token', function (token) {
- *   // 请将token存储到全局，跨进程级别的全局
- *   // 比如写到数据库、redis等
- *   // 这样才能在cluster模式下使用
- * });
- * // 或者
- * getTokenFromGlobal(function (token) {
- *   // var api = new API('appid', 'secret', token);
- * });
- * ```
- * @param {String} appid 在公众平台上申请得到的appid
- * @param {String} appsecret 在公众平台上申请得到的app secret
- * @param {Object} token 可选的。全局token对象，该对象在调用一次`getAccessToken`后得到
- */
-var API = function (appid, appsecret, token) {
-  this.appid = appid;
-  this.appsecret = appsecret;
-  if (token) {
-    this.token = AccessToken(token.accessToken, token.expireTime);
-  }
-  this.prefix = 'https://api.weixin.qq.com/cgi-bin/';
-  this.mpPrefix = 'https://mp.weixin.qq.com/cgi-bin/';
-  this.fileServerPrefix = 'http://file.api.weixin.qq.com/cgi-bin/';
-  this.payPrefix = 'https://api.weixin.qq.com/pay/';
-  EventEmitter.call(this);
-};
-inherits(API, EventEmitter);
-
-/**
- * 根据创建API时传入的appid和appsecret获取access token
- * 进行后续所有API调用时，需要先获取access token
- * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=获取access_token>
- *
- * Examples:
- * ```
- * api.getAccessToken(callback);
- * ```
- * Callback:
- *
- * - `err`, 获取access token出现异常时的异常对象
- * - `result`, 成功时得到的响应结果
- *
- * Result:
- * ```
- * {"access_token": "ACCESS_TOKEN","expires_in": 7200}
- * ```
- * @param {Function} callback 回调函数
- */
-API.prototype.getAccessToken = function (callback) {
-  var that = this;
-  var url = this.prefix + 'token?grant_type=client_credential&appid=' + this.appid + '&secret=' + this.appsecret;
-  urllib.request(url, {dataType: 'json'}, wrapper(function (err, data) {
-    if (err) {
-      return callback(err);
-    }
-    // 过期时间，因网络延迟等，将实际过期时间提前10秒，以防止临界点
-    var expireTime = (new Date().getTime()) + (data.expires_in - 10) * 1000;
-    that.token = AccessToken(data.access_token, expireTime);
-    that.emit('token', that.token);
-    callback(err, that.token);
-  }));
-  return this;
-};
-
-/**
- * 需要access token的接口调用如果采用preRequest进行封装后，就可以直接调用
- * 无需依赖getAccessToken为前置调用
- *
- * @param {Function} method 需要封装的方法
- * @param {Array} args 方法需要的参数
- */
-API.prototype.preRequest = function (method, args) {
-  var that = this;
-  var callback = args[args.length - 1];
-  if (that.token && that.token.isValid()) {
-    method.apply(that, args);
-  } else {
-    that.getAccessToken(function (err, data) {
-      // 如遇错误，通过回调函数传出
-      if (err) {
-        callback(err, data);
-        return;
-      }
-      method.apply(that, args);
-    });
-  }
-};
-
-/**
- * 创建自定义菜单
- * 详细请看：http://mp.weixin.qq.com/wiki/index.php?title=自定义菜单创建接口
- *
- * Menu:
- * ```
- * {
- *  "button":[
- *    {
- *      "type":"click",
- *      "name":"今日歌曲",
- *      "key":"V1001_TODAY_MUSIC"
- *    },
- *    {
- *      "name":"菜单",
- *      "sub_button":[
- *        {
- *          "type":"view",
- *          "name":"搜索",
- *          "url":"http://www.soso.com/"
- *        },
- *        {
- *          "type":"click",
- *          "name":"赞一下我们",
- *          "key":"V1001_GOOD"
- *        }]
- *      }]
- *    }
- *  ]
- * }
- * ```
- * Examples:
- * ```
- * api.createMenu(menu, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {"errcode":0,"errmsg":"ok"}
- * ```
- * @param {Object} menu 菜单对象
- * @param {Function} callback 回调函数
- */
-API.prototype.createMenu = function (menu, callback) {
-  this.preRequest(this._createMenu, arguments);
-};
-
-/*!
- * 创建自定义菜单的未封装版本
- */
-API.prototype._createMenu = function (menu, callback) {
-  var url = this.prefix + 'menu/create?access_token=' + this.token.accessToken;
-  urllib.request(url, postJSON(menu), wrapper(callback));
-};
-
-/**
- * 获取菜单
- * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=自定义菜单查询接口>
- *
- * Examples:
- * ```
- * api.getMenu(callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * // 结果示例
- * {
- *  "menu": {
- *    "button":[
- *      {"type":"click","name":"今日歌曲","key":"V1001_TODAY_MUSIC","sub_button":[]},
- *      {"type":"click","name":"歌手简介","key":"V1001_TODAY_SINGER","sub_button":[]},
- *      {"name":"菜单","sub_button":[
- *        {"type":"view","name":"搜索","url":"http://www.soso.com/","sub_button":[]},
- *        {"type":"view","name":"视频","url":"http://v.qq.com/","sub_button":[]},
- *        {"type":"click","name":"赞一下我们","key":"V1001_GOOD","sub_button":[]}]
- *      }
- *    ]
- *  }
- * }
- * ```
- * @param {Function} callback 回调函数
- */
-API.prototype.getMenu = function (callback) {
-  this.preRequest(this._getMenu, arguments);
-};
-
-/*!
- * 获取自定义菜单的未封装版本
- */
-API.prototype._getMenu = function (callback) {
-  var url = this.prefix + 'menu/get?access_token=' + this.token.accessToken;
-  urllib.request(url, {dataType: 'json'}, wrapper(callback));
-};
-
-/**
- * 删除自定义菜单
- * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=自定义菜单删除接口>
- * Examples:
- * ```
- * api.removeMenu(callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {"errcode":0,"errmsg":"ok"}
- * ```
- * @param {Function} callback 回调函数
- */
-API.prototype.removeMenu = function (callback) {
-  this.preRequest(this._removeMenu, arguments);
-};
-
-/*!
- * 删除自定义菜单的未封装版本
- */
-API.prototype._removeMenu = function (callback) {
-  var url = this.prefix + 'menu/delete?access_token=' + this.token.accessToken;
-  urllib.request(url, {dataType: 'json'}, wrapper(callback));
-};
-
-/**
- * 创建临时二维码
- * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=生成带参数的二维码>
- * Examples:
- * ```
- * api.createTmpQRCode(10000, 1800, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {
- *  "ticket":"gQG28DoAAAAAAAAAASxodHRwOi8vd2VpeGluLnFxLmNvbS9xL0FuWC1DNmZuVEhvMVp4NDNMRnNRAAIEesLvUQMECAcAAA==",
- *  "expire_seconds":1800
- * }
- * ```
- * @param {Number} sceneId 场景ID
- * @param {Number} expire 过期时间，单位秒。最大不超过1800
- * @param {Function} callback 回调函数
- */
-API.prototype.createTmpQRCode = function (sceneId, expire, callback) {
-  this.preRequest(this._createTmpQRCode, arguments);
-};
-
-/*!
- * 创建临时二维码的未封装版本
- */
-API.prototype._createTmpQRCode = function (sceneId, expire, callback) {
-  var url = this.prefix + 'qrcode/create?access_token=' + this.token.accessToken;
-  var data = {
-    "expire_seconds": expire,
-    "action_name": "QR_SCENE",
-    "action_info": {"scene": {"scene_id": sceneId}}
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 创建永久二维码
- * 详细请看：<http://mp.weixin.qq.com/wiki/index.php?title=生成带参数的二维码>
- * Examples:
- * ```
- * api.createLimitQRCode(100, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {
- *  "ticket":"gQG28DoAAAAAAAAAASxodHRwOi8vd2VpeGluLnFxLmNvbS9xL0FuWC1DNmZuVEhvMVp4NDNMRnNRAAIEesLvUQMECAcAAA=="
- * }
- * ```
- * @param {Number} sceneId 场景ID。ID不能大于100000
- * @param {Function} callback 回调函数
- */
-API.prototype.createLimitQRCode = function (sceneId, callback) {
-  this.preRequest(this._createLimitQRCode, arguments);
-};
-
-/*!
- * 创建永久二维码的未封装版本
- */
-API.prototype._createLimitQRCode = function (sceneId, callback) {
-  var url = this.prefix + 'qrcode/create?access_token=' + this.token.accessToken;
-  var data = {
-    "action_name": "QR_LIMIT_SCENE",
-    "action_info": {"scene": {"scene_id": sceneId}}
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 生成显示二维码的链接。微信扫描后，可立即进入场景
- * Examples:
- * ```
- * api.showQRCodeURL(titck);
- * // => https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=TICKET
- * ```
- * @param {String} ticket 二维码Ticket
- * @return {String} 显示二维码的URL地址，通过img标签可以显示出来
- */
-API.prototype.showQRCodeURL = function (ticket) {
-  return this.mpPrefix + 'showqrcode?ticket=' + ticket;
-};
-
-/**
- * 获取分组列表
- * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
- * Examples:
- * ```
- * api.getGroups(callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {
- *  "groups": [
- *    {"id": 0, "name": "未分组", "count": 72596},
- *    {"id": 1, "name": "黑名单", "count": 36}
- *  ]
- * }
- * ```
- * @param {Function} callback 回调函数
- */
-API.prototype.getGroups = function (callback) {
-  this.preRequest(this._getGroups, arguments);
-};
-
-/*!
- * 获取分组列表的未封装版本
- */
-API.prototype._getGroups = function (callback) {
-  // https://api.weixin.qq.com/cgi-bin/groups/get?access_token=ACCESS_TOKEN
-  var url = this.prefix + 'groups/get?access_token=' + this.token.accessToken;
-  urllib.request(url, {dataType: 'json'}, wrapper(callback));
-};
-
-/**
- * 查询用户在哪个分组
- * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
- * Examples:
- * ```
- * api.getWhichGroup(openid, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {
- *  "groupid": 102
- * }
- * ```
- * @param {String} openid Open ID
- * @param {Function} callback 回调函数
- */
-API.prototype.getWhichGroup = function (openid, callback) {
-  this.preRequest(this._getWhichGroup, arguments);
-};
-
-/*!
- * 查询用户在哪个分组未分组版本
- */
-API.prototype._getWhichGroup = function (openid, callback) {
-  // https://api.weixin.qq.com/cgi-bin/groups/getid?access_token=ACCESS_TOKEN
-  var url = this.prefix + 'groups/getid?access_token=' + this.token.accessToken;
-  var data = {
-    "openid": openid
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 创建分组
- * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
- * Examples:
- * ```
- * api.createGroup('groupname', callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {"group": {"id": 107, "name": "test"}}
- * ```
- * @param {String} name 分组名字
- * @param {Function} callback 回调函数
- */
-API.prototype.createGroup = function (name, callback) {
-  this.preRequest(this._createGroup, arguments);
-};
-
-/*!
- * 创建分组的未封装版本
- */
-API.prototype._createGroup = function (name, callback) {
-  // https://api.weixin.qq.com/cgi-bin/groups/create?access_token=ACCESS_TOKEN
-  // POST数据格式：json
-  // POST数据例子：{"group":{"name":"test"}}
-  var url = this.prefix + 'groups/create?access_token=' + this.token.accessToken;
-  var data = {
-    "group": {"name": name}
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 更新分组名字
- * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
- * Examples:
- * ```
- * api.updateGroup(107, 'new groupname', callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {"errcode": 0, "errmsg": "ok"}
- * ```
- * @param {Number} id 分组ID
- * @param {String} name 新的分组名字
- * @param {Function} callback 回调函数
- */
-API.prototype.updateGroup = function (id, name, callback) {
-  this.preRequest(this._updateGroup, arguments);
-};
-
-/*!
- * 更新分组名字的未封装版本
- */
-API.prototype._updateGroup = function (id, name, callback) {
-  // http请求方式: POST（请使用https协议）
-  // https://api.weixin.qq.com/cgi-bin/groups/update?access_token=ACCESS_TOKEN
-  // POST数据格式：json
-  // POST数据例子：{"group":{"id":108,"name":"test2_modify2"}}
-  var url = this.prefix + 'groups/update?access_token=' + this.token.accessToken;
-  var data = {
-    "group": {"id": id, "name": name}
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 移动用户进分组
- * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=分组管理接口>
- * Examples:
- * ```
- * api.moveUserToGroup(openid, groupId, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {"errcode": 0, "errmsg": "ok"}
- * ```
- * @param {String} openid 用户的openid
- * @param {Number} groupId 分组ID
- * @param {Function} callback 回调函数
- */
-API.prototype.moveUserToGroup = function (openid, groupId, callback) {
-  this.preRequest(this._moveUserToGroup, arguments);
-};
-
-/*!
- * 移动用户进分组的未封装版本
- */
-API.prototype._moveUserToGroup = function (openid, groupId, callback) {
-  // http请求方式: POST（请使用https协议）
-  // https://api.weixin.qq.com/cgi-bin/groups/members/update?access_token=ACCESS_TOKEN
-  // POST数据格式：json
-  // POST数据例子：{"openid":"oDF3iYx0ro3_7jD4HFRDfrjdCM58","to_groupid":108}
-  var url = this.prefix + 'groups/members/update?access_token=' + this.token.accessToken;
-  var data = {
-    "openid": openid,
-    "to_groupid": groupId
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 获取用户基本信息
- * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=获取用户基本信息>
- * Examples:
- * ```
- * api.getUser(openid, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {
- *  "subscribe": 1,
- *  "openid": "o6_bmjrPTlm6_2sgVt7hMZOPfL2M",
- *  "nickname": "Band",
- *  "sex": 1,
- *  "language": "zh_CN",
- *  "city": "广州",
- *  "province": "广东",
- *  "country": "中国",
- *  "headimgurl": "http://wx.qlogo.cn/mmopen/g3MonUZtNHkdmzicIlibx6iaFqAc56vxLSUfpb6n5WKSYVY0ChQKkiaJSgQ1dZuTOgvLLrhJbERQQ4eMsv84eavHiaiceqxibJxCfHe/0",
- *  "subscribe_time": 1382694957
- * }
- * ```
- * @param {String} openid 用户的openid
- * @param {Function} callback 回调函数
- */
-API.prototype.getUser = function (openid, callback) {
-  this.preRequest(this._getUser, arguments);
-};
-
-/*!
- * 获取用户基本信息的未封装版本
- */
-API.prototype._getUser = function (openid, callback) {
-  // https://api.weixin.qq.com/cgi-bin/user/info?access_token=ACCESS_TOKEN&openid=OPENID
-  var url = this.prefix + 'user/info?openid=' + openid + '&access_token=' + this.token.accessToken;
-  urllib.request(url, {dataType: 'json'}, wrapper(callback));
-};
-
-/**
- * 获取关注者列表
- * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=获取关注者列表
- * Examples:
- * ```
- * api.getFollowers(callback);
- * // or
- * api.getFollowers(nextOpenid, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {
- *  "total":2,
- *  "count":2,
- *  "data":{
- *    "openid":["","OPENID1","OPENID2"]
- *  },
- *  "next_openid":"NEXT_OPENID"
- * }
- * ```
- * @param {String} nextOpenid 调用一次之后，传递回来的nextOpenid。第一次获取时可不填
- * @param {Function} callback 回调函数
- */
-API.prototype.getFollowers = function (nextOpenid, callback) {
-  this.preRequest(this._getFollowers, arguments);
-};
-
-/*!
- * 获取关注者列表的未封装版本
- */
-API.prototype._getFollowers = function (nextOpenid, callback) {
-  // https://api.weixin.qq.com/cgi-bin/user/get?access_token=ACCESS_TOKEN&next_openid=NEXT_OPENID
-  if (typeof nextOpenid === 'function') {
-    callback = nextOpenid;
-    nextOpenid = '';
-  }
-  var url = this.prefix + 'user/get?next_openid=' + nextOpenid + '&access_token=' + this.token.accessToken;
-  urllib.request(url, {dataType: 'json'}, wrapper(callback));
-};
-
-/**
- * 客服消息，发送文字消息
- * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
- * Examples:
- * ```
- * api.sendText('openid', 'Hello world', callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * @param {String} openid 用户的openid
- * @param {String} text 发送的消息内容
- * @param {Function} callback 回调函数
- */
-API.prototype.sendText = function (openid, text, callback) {
-  this.preRequest(this._sendText, arguments);
-};
-
-/*!
- * 客服消息，发送文字消息的未封装版本
- */
-API.prototype._sendText = function (openid, text, callback) {
-  // {
-  //  "touser":"OPENID",
-  //  "msgtype":"text",
-  //  "text": {
-  //    "content":"Hello World"
-  //  }
-  // }
-  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
-  var data = {
-    "touser": openid,
-    "msgtype": "text",
-    "text": {
-      "content": text
-    }
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 客服消息，发送图片消息
- * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
- * Examples:
- * ```
- * api.sendImage('openid', 'media_id', callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * @param {String} openid 用户的openid
- * @param {String} mediaId 媒体文件的ID，参见uploadMedia方法
- * @param {Function} callback 回调函数
- */
-API.prototype.sendImage = function (openid, mediaId, callback) {
-  this.preRequest(this._sendImage, arguments);
-};
-
-/*!
- * 客服消息，发送图片消息的未封装版本
- */
-API.prototype._sendImage = function (openid, mediaId, callback) {
-  // {
-  //  "touser":"OPENID",
-  //  "msgtype":"image",
-  //  "image": {
-  //    "media_id":"MEDIA_ID"
-  //  }
-  // }
-  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
-  var data = {
-    "touser": openid,
-    "msgtype":"image",
-    "image": {
-      "media_id": mediaId
-    }
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 客服消息，发送语音消息
- * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
- * Examples:
- * ```
- * api.sendVoice('openid', 'media_id', callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * @param {String} openid 用户的openid
- * @param {String} mediaId 媒体文件的ID
- * @param {Function} callback 回调函数
- */
-API.prototype.sendVoice = function (openid, mediaId, callback) {
-  this.preRequest(this._sendVoice, arguments);
-};
-
-/*!
- * 客服消息，发送语音消息的未封装版本
- */
-API.prototype._sendVoice = function (openid, mediaId, callback) {
-  // {
-  //  "touser":"OPENID",
-  //  "msgtype":"voice",
-  //  "voice": {
-  //    "media_id":"MEDIA_ID"
-  //  }
-  // }
-  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
-  var data = {
-    "touser": openid,
-    "msgtype": "voice",
-    "voice": {
-      "media_id": mediaId
-    }
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 客服消息，发送视频消息
- * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
- * Examples:
- * ```
- * api.sendVideo('openid', 'media_id', 'thumb_media_id', callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * @param {String} openid 用户的openid
- * @param {String} mediaId 媒体文件的ID
- * @param {String} thumbMediaId 缩略图文件的ID
- * @param {Function} callback 回调函数
- */
-API.prototype.sendVideo = function (openid, mediaId, thumbMediaId, callback) {
-  this.preRequest(this._sendVideo, arguments);
-};
-
-/*!
- * 客服消息，发送视频消息的未封装版本
- */
-API.prototype._sendVideo = function (openid, mediaId, thumbMediaId, callback) {
-  // {
-  //  "touser":"OPENID",
-  //  "msgtype":"video",
-  //  "image": {
-  //    "media_id":"MEDIA_ID"
-  //    "thumb_media_id":"THUMB_MEDIA_ID"
-  //  }
-  // }
-  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
-  var data = {
-    "touser": openid,
-    "msgtype":"video",
-    "video": {
-      "media_id": mediaId,
-      "thumb_media_id": thumbMediaId
-    }
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 客服消息，发送音乐消息
- * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
- * Examples:
- * ```
- * var music = {
- *  title: '音乐标题', // 可选
- *  description: '描述内容', // 可选
- *  musicurl: 'http://url.cn/xxx', 音乐文件地址
- *  hqmusicurl: "HQ_MUSIC_URL",
- *  thumb_media_id: "THUMB_MEDIA_ID"
- * };
- * api.sendMusic('openid', music, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * @param {String} openid 用户的openid
- * @param {Object} music 音乐文件
- * @param {Function} callback 回调函数
- */
-API.prototype.sendMusic = function (openid, music, callback) {
-  this.preRequest(this._sendMusic, arguments);
-};
-
-/*!
- * 客服消息，发送音乐消息的未封装版本
- */
-API.prototype._sendMusic = function (openid, music, callback) {
-  // {
-  //  "touser":"OPENID",
-  //  "msgtype":"music",
-  //  "music": {
-  //    "title":"MUSIC_TITLE", // 可选
-  //    "description":"MUSIC_DESCRIPTION", // 可选
-  //    "musicurl":"MUSIC_URL",
-  //    "hqmusicurl":"HQ_MUSIC_URL",
-  //    "thumb_media_id":"THUMB_MEDIA_ID"
-  //  }
-  // }
-  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
-  var data = {
-    "touser": openid,
-    "msgtype":"music",
-    "music": music
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 客服消息，发送图文消息
- * 详细细节 http://mp.weixin.qq.com/wiki/index.php?title=发送客服消息
- * Examples:
- * ```
- * var articles = [
- *  {
- *    "title":"Happy Day",
- *    "description":"Is Really A Happy Day",
- *    "url":"URL",
- *    "picurl":"PIC_URL"
- *  },
- *  {
- *    "title":"Happy Day",
- *    "description":"Is Really A Happy Day",
- *    "url":"URL",
- *    "picurl":"PIC_URL"
- *  }];
- * api.sendNews('openid', articles, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * @param {String} openid 用户的openid
- * @param {Array} articles 图文列表
- * @param {Function} callback 回调函数
- */
-API.prototype.sendNews = function (openid, articles, callback) {
-  this.preRequest(this._sendNews, arguments);
-};
-
-/*!
- * 客服消息，发送图文消息的未封装版本
- */
-API.prototype._sendNews = function (openid, articles, callback) {
-  // {
-  //  "touser":"OPENID",
-  //  "msgtype":"news",
-  //  "news":{
-  //    "articles": [
-  //      {
-  //        "title":"Happy Day",
-  //        "description":"Is Really A Happy Day",
-  //        "url":"URL",
-  //        "picurl":"PIC_URL"
-  //      },
-  //      {
-  //        "title":"Happy Day",
-  //        "description":"Is Really A Happy Day",
-  //        "url":"URL",
-  //        "picurl":"PIC_URL"
-  //      }]
-  //   }
-  // }
-  var url = this.prefix + 'message/custom/send?access_token=' + this.token.accessToken;
-  var data = {
-    "touser": openid,
-    "msgtype":"news",
-    "news": {
-      "articles": articles
-    }
-  };
-  urllib.request(url, postJSON(data), wrapper(callback));
-};
-
-/**
- * 上传多媒体文件，分别有图片（image）、语音（voice）、视频（video）和缩略图（thumb）
- * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=上传下载多媒体文件>
- * Examples:
- * ```
- * api.uploadMedia('filepath', type, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {"type":"TYPE","media_id":"MEDIA_ID","created_at":123456789}
- * ```
- * Shortcut:
- *
- * - `API.prototype.uploadImage(filepath, callback);`
- * - `API.prototype.uploadVoice(filepath, callback);`
- * - `API.prototype.uploadVideo(filepath, callback);`
- * - `API.prototype.uploadThumb(filepath, callback);`
- *
- * @param {String} filepath 文件路径
- * @param {String} type 媒体类型，可用值有image、voice、video、thumb
- * @param {Function} callback 回调函数
- */
-API.prototype.uploadMedia = function (filepath, type, callback) {
-  this.preRequest(this._uploadMedia, arguments);
-};
-
-/*!
- * 上传多媒体文件的未封装版本
- */
-API.prototype._uploadMedia = function (filepath, type, callback) {
-  var that = this;
-  fs.stat(filepath, function (err, stat) {
-    if (err) {
-      return callback(err);
-    }
-    var form = formstream();
-    form.file('media', filepath, path.basename(filepath), stat.size);
-    var url = that.fileServerPrefix + 'media/upload?access_token=' + that.token.accessToken + '&type=' + type;
-    var opts = {
-      dataType: 'json',
-      type: 'POST',
-      timeout: 60000, // 60秒超时
-      headers: form.headers(),
-      stream: form
-    };
-    urllib.request(url, opts, wrapper(callback));
-  });
-};
-
-['image', 'voice', 'video', 'thumb'].forEach(function (type) {
-  var method = 'upload' + type[0].toUpperCase() + type.substring(1);
-  API.prototype[method] = function (filepath, callback) {
-    this.uploadMedia(filepath, type, callback);
-  };
-});
-
-/**
- * 根据媒体ID获取媒体内容
- * 详情请见：<http://mp.weixin.qq.com/wiki/index.php?title=上传下载多媒体文件>
- * Examples:
- * ```
- * api.getMedia('media_id', callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的文件Buffer对象
- * - `res`, HTTP响应对象
- *
- * @param {String} mediaId 媒体文件的ID
- * @param {Function} callback 回调函数
- */
-API.prototype.getMedia = function (mediaId, callback) {
-  this.preRequest(this._getMedia, arguments);
-};
-
-/*!
- * 上传多媒体文件的未封装版本
- */
-API.prototype._getMedia = function (mediaId, callback) {
-  var url = this.fileServerPrefix + 'media/get?access_token=' + this.token.accessToken + '&media_id=' + mediaId;
-  urllib.request(url, {}, wrapper(function (err, data, res) {
-    // 不用处理err，因为wrapper函数处理过
-    var contentType = res.headers['content-type'];
-    if (contentType === 'application/json') {
-      var ret;
-      try {
-        ret = JSON.parse(data);
-        if (ret.errcode) {
-          err = new Error(ret.errmsg);
-          err.name = 'WeChatAPIError';
-        }
-      } catch (ex) {
-        callback(ex, data, res);
-        return;
-      }
-      callback(err, ret, res);
-    } else {
-      // 输出Buffer对象
-      callback(null, data, res);
-    }
-  }));
-};
-
-/**
- * 微信公众号支付: 发货通知
- * 详情请见：<http://mp.weixin.qq.com/htmledition/res/bussiness-faq/wx_mp_pay.zip> 接口文档订单发货通知
- *
- * Package:
- * ```
- * {
- *   "appid" : "wwwwb4f85f3a797777",
- *   "openid" : "oX99MDgNcgwnz3zFN3DNmo8uwa-w",
- *   "transid" : "111112222233333",
- *   "out_trade_no" : "555666uuu",
- *   "deliver_timestamp" : "1369745073",
- *   "deliver_status" : "1",
- *   "deliver_msg" : "ok",
- *   "app_signature" : "53cca9d47b883bd4a5c85a9300df3da0cb48565c",
- *   "sign_method" : "sha1"
- * }
- * ```
- * Examples:
- * ```
- * api.deliverNotify(package, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {"errcode":0,"errmsg":"ok"}
- * ```
- *
- * @param {Object} package package对象
- * @param {Function} callback 回调函数
- */
-API.prototype.deliverNotify = function (package, callback) {
-  this.preRequest(this._deliverNotify, arguments);
-};
-
-/*!
- * 发货通知的未封装版本
- */
-API.prototype._deliverNotify = function (package, callback) {
-  var url = this.payPrefix + 'delivernotify?access_token=' + this.token.accessToken;
-  urllib.request(url, postJSON(package), wrapper(callback));
-};
-
-/**
- * 微信公众号支付: 订单查询
- * 详情请见：<http://mp.weixin.qq.com/htmledition/res/bussiness-faq/wx_mp_pay.zip> 接口文档订单查询部分
- *
- * Package:
- * ```
- * {
- *   "appid" : "wwwwb4f85f3a797777",
- *   "package" : "out_trade_no=11122&partner=1900090055&sign=4e8d0df3da0c3d0df38f",
- *   "timestamp" : "1369745073",
- *   "app_signature" : "53cca9d47b883bd4a5c85a9300df3da0cb48565c",
- *   "sign_method" : "sha1"
- * }
- * ```
- * Examples:
- * ```
- * api.orderQuery(query, callback);
- * ```
- * Callback:
- *
- * - `err`, 调用失败时得到的异常
- * - `result`, 调用正常时得到的对象
- *
- * Result:
- * ```
- * {
- *   "errcode":0,
- *   "errmsg":"ok",
- *   "order_info":
- *   {
- *     "ret_code":0,
- *     "ret_msg":"",
- *     "input_charset":"GBK",
- *     "trade_state":"0",
- *     "trade_mode":"1",
- *     "partner":"1900000109",
- *     "bank_type":"CMB_FP",
- *     "bank_billno":"207029722724",
- *     "total_fee":"1",
- *     "fee_type":"1",
- *     "transaction_id":"1900000109201307020305773741",
- *     "out_trade_no":"2986872580246457300",
- *     "is_split":"false",
- *     "is_refund":"false",
- *     "attach":"",
- *     "time_end":"20130702175943",
- *     "transport_fee":"0",
- *     "product_fee":"1",
- *     "discount":"0",
- *     "rmb_total_fee":""
- *   }
- * }
- * ```
- *
- * @param {Object} query query对象
- * @param {Function} callback 回调函数
- */
-API.prototype.orderQuery = function (query, callback) {
-  this.preRequest(this._orderQuery, arguments);
-};
-
-/*!
- * 发货通知的未封装版本
- */
-API.prototype._orderQuery = function (query, callback) {
-  var url = this.payPrefix + 'orderquery?access_token=' + this.token.accessToken;
-  urllib.request(url, postJSON(query), wrapper(callback));
-};
-
-module.exports = API;
diff --git a/lib/oauth.js b/lib/oauth.js
index b29273b9..cc616141 100644
--- a/lib/oauth.js
+++ b/lib/oauth.js
@@ -171,7 +171,7 @@ OAuth.prototype._getUser = function (openid, callback) {
  *  "province": "PROVINCE"
  *  "city": "CITY",
  *  "country": "COUNTRY",
- *  "headimgurl": "http://wx.qlogo.cn/mmopen/g3MonUZtNHkdmzicIlibx6iaFqAc56vxLSUfpb6n5WKSYVY0ChQKkiaJSgQ1dZuTOgvLLrhJbERQQ4eMsv84eavHiaiceqxibJxCfHe/46", 
+ *  "headimgurl": "http://wx.qlogo.cn/mmopen/g3MonUZtNHkdmzicIlibx6iaFqAc56vxLSUfpb6n5WKSYVY0ChQKkiaJSgQ1dZuTOgvLLrhJbERQQ4eMsv84eavHiaiceqxibJxCfHe/46",
  *  "privilege": [
  *    "PRIVILEGE1"
  *    "PRIVILEGE2"
diff --git a/lib/wechat.js b/lib/wechat.js
index 36115879..971c9a39 100644
--- a/lib/wechat.js
+++ b/lib/wechat.js
@@ -344,7 +344,8 @@ var middleware = function (token, handle) {
   };
 });
 
+middleware.toXML = compiled;
+middleware.reply = reply;
+middleware.checkSignature = checkSignature;
+
 module.exports = middleware;
-module.exports.toXML = compiled;
-module.exports.reply = reply;
-module.exports.checkSignature = checkSignature;
diff --git a/package.json b/package.json
index 3028824f..97a51c09 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
   "devDependencies": {
     "supertest": "*",
     "mocha": "*",
-    "should": "*",
+    "should": "~3.0.0",
     "expect.js": "*",
     "connect": "*",
     "blanket": "*",
diff --git a/test/common.test.js b/test/common.test.js
index 5396d45c..8004772c 100644
--- a/test/common.test.js
+++ b/test/common.test.js
@@ -747,25 +747,4 @@ describe('common.js', function () {
       });
     });
   });
-
-  describe('pay', function () {
-    var api = new API('appid', 'secret');
-    it('deliverNotify should ok', function (done) {
-      api.deliverNotify('{}', function (err, menu) {
-        should.exist(err);
-        err.name.should.be.equal('WeChatAPIError');
-        err.message.should.be.equal('invalid appid');
-        done();
-      });
-    });
-
-    it('orderQuery should ok', function (done) {
-      api.orderQuery('{}', function (err, menu) {
-        should.exist(err);
-        err.name.should.be.equal('WeChatAPIError');
-        err.message.should.be.equal('invalid appid');
-        done();
-      });
-    });
-  });
 });
diff --git a/test/pay.test.js b/test/pay.test.js
new file mode 100644
index 00000000..7a9c8930
--- /dev/null
+++ b/test/pay.test.js
@@ -0,0 +1,23 @@
+var should = require('should');
+var API = require('../').API;
+
+describe('pay', function () {
+  var api = new API('appid', 'secret');
+  it('deliverNotify should ok', function (done) {
+    api.deliverNotify('{}', function (err, menu) {
+      should.exist(err);
+      err.name.should.be.equal('WeChatAPIError');
+      err.message.should.be.equal('invalid appid');
+      done();
+    });
+  });
+
+  it('orderQuery should ok', function (done) {
+    api.orderQuery('{}', function (err, menu) {
+      should.exist(err);
+      err.name.should.be.equal('WeChatAPIError');
+      err.message.should.be.equal('invalid appid');
+      done();
+    });
+  });
+});