diff --git a/CHANGELOG.MD b/CHANGELOG.MD
index d47afcd21d5e1f8103e59f79822bb983debb7cc4..d3846dfc05ee6731d4885ca82aca360013481bb2 100644
--- a/CHANGELOG.MD
+++ b/CHANGELOG.MD
@@ -1,6 +1,20 @@
 # 更新日志
 
+### 2.20.3 | 2018.09.26
+
+- 增加退出登陆接口
+- 修正 /check/music 的检查逻辑
+- 优化 Cookies 设置
+- 重构单元测试
+
+  [by @nondanee](https://github.com/nondanee)
+
+- 增加 301 需要登陆提示信息
+
+- 更新文档
+
 ### 2.20.2 | 2018.09.22
+
 增加热门评论和视频评论接口,更新文档
 
 ### 2.20.1 | 2018.09.17
diff --git a/README.MD b/README.MD
index 61ae4788212a69d6375dfbd0eda97e538c409198..73f197373217f1debe5006963db1c12c573ee20c 100644
--- a/README.MD
+++ b/README.MD
@@ -70,7 +70,7 @@
 48. 独家放送
 49. mv 排行
 50. 获取 mv 数据
-51. 播放 mv
+51. 播放 mv/视频
 52. 排行榜
 53. 歌手榜
 54. 云盘
@@ -96,6 +96,9 @@
 74. 登录状态
 75. 获取视频数据
 76. 发送/删除评论
+77. 热门评论
+78. 视频评论
+79. 退出登录
 
 ## 环境要求
 
diff --git a/docs/README.md b/docs/README.md
index 606916f0b2df65a7fe942daffca8dbd43947ac4b..5c1709cc5ea25712827e030a7331d0181321eb47 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -94,6 +94,7 @@
 76. 发送/删除评论
 77. 热门评论
 78. 视频评论
+79. 退出登录
 
 ## 安装
 
@@ -233,6 +234,12 @@ Cookies
 
 **调用例子 :** `/login/refresh`
 
+### 退出登录
+
+说明 : 调用此接口 , 可退出登录
+
+**调用例子 :** `/logout`
+
 ### 登录状态
 
 说明 : 调用此接口,可获取登录状态
@@ -781,7 +788,8 @@ mp3url 不能直接用 , 可通过 `/music/url` 接口传入歌曲 id 获取具
 **调用例子 :** `/comment/video?id=89ADDE33C0AAE8EC14B99F6750DB954D`
 
 ### 热门评论
-说明 : 调用此接口 ,  传入 type, 资源 id 可获得对应资源热门评论 ( 不需要登录 )
+
+说明 : 调用此接口 , 传入 type, 资源 id 可获得对应资源热门评论 ( 不需要登录 )
 
 **必选参数 :**
 
@@ -797,6 +805,7 @@ mp3url 不能直接用 , 可通过 `/music/url` 接口传入歌曲 id 获取具
 4: 电台
 5: 视频
 ```
+
 **接口地址 :** `/comment/hot`
 
 **调用例子 :** `/comment/hot?id=186016&type=0`
@@ -859,7 +868,7 @@ mp3url 不能直接用 , 可通过 `/music/url` 接口传入歌曲 id 获取具
 2. 删除评论
 
    **必选参数**
-    `action`:0 删除
+   `action`:0 删除
 
    `tpye`: 数字,资源类型,对应歌曲,mv,专辑,歌单,电台,视频对应以下类型
 
diff --git a/package.json b/package.json
index f97631f6d6cdb8e7a9c1133c1914d5b529efbbea..531014df065f067e4b99aff92866b326a6cebc3c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "NeteaseCloudMusicApi",
-  "version": "2.20.2",
+  "version": "2.20.3",
   "description": "网易云音乐 NodeJS 版 API",
   "scripts": {
     "start": "node app.js",
diff --git a/util/util.js b/util/util.js
index 65243d342d03615a59d4dd2f17cbd0ac27c82c94..c514644964713ec14de99e5536db6367445617a6 100644
--- a/util/util.js
+++ b/util/util.js
@@ -1,33 +1,33 @@
-const Encrypt = require("./crypto.js");
-const request = require("request");
-const queryString = require("querystring");
+const Encrypt = require('./crypto.js')
+const request = require('request')
+const queryString = require('querystring')
 
-request.debug = true;
+request.debug = true
 
 function randomUserAgent() {
   const userAgentList = [
-    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36",
-    "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1",
-    "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1",
-    "Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36",
-    "Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36",
-    "Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36",
-    "Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_2 like Mac OS X) AppleWebKit/603.2.4 (KHTML, like Gecko) Mobile/14F89;GameHelper",
-    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.4",
-    "Mozilla/5.0 (iPhone; CPU iPhone OS 10_0 like Mac OS X) AppleWebKit/602.1.38 (KHTML, like Gecko) Version/10.0 Mobile/14A300 Safari/602.1",
-    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36",
-    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:46.0) Gecko/20100101 Firefox/46.0",
-    "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:46.0) Gecko/20100101 Firefox/46.0",
-    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)",
-    "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0)",
-    "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",
-    "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Win64; x64; Trident/6.0)",
-    "Mozilla/5.0 (Windows NT 6.3; Win64, x64; Trident/7.0; rv:11.0) like Gecko",
-    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/13.10586",
-    "Mozilla/5.0 (iPad; CPU OS 10_0 like Mac OS X) AppleWebKit/602.1.38 (KHTML, like Gecko) Version/10.0 Mobile/14A300 Safari/602.1"
-  ];
-  const num = Math.floor(Math.random() * userAgentList.length);
-  return userAgentList[num];
+    'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36',
+    'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36',
+    'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36',
+    'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36',
+    'Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_2 like Mac OS X) AppleWebKit/603.2.4 (KHTML, like Gecko) Mobile/14F89;GameHelper',
+    'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.4',
+    'Mozilla/5.0 (iPhone; CPU iPhone OS 10_0 like Mac OS X) AppleWebKit/602.1.38 (KHTML, like Gecko) Version/10.0 Mobile/14A300 Safari/602.1',
+    'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36',
+    'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:46.0) Gecko/20100101 Firefox/46.0',
+    'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:46.0) Gecko/20100101 Firefox/46.0',
+    'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)',
+    'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0)',
+    'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)',
+    'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Win64; x64; Trident/6.0)',
+    'Mozilla/5.0 (Windows NT 6.3; Win64, x64; Trident/7.0; rv:11.0) like Gecko',
+    'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/13.10586',
+    'Mozilla/5.0 (iPad; CPU OS 10_0 like Mac OS X) AppleWebKit/602.1.38 (KHTML, like Gecko) Version/10.0 Mobile/14A300 Safari/602.1'
+  ]
+  const num = Math.floor(Math.random() * userAgentList.length)
+  return userAgentList[num]
 }
 
 function createWebAPIRequest(
@@ -39,52 +39,65 @@ function createWebAPIRequest(
   callback,
   errorCallback
 ) {
-  const csrfToken = cookie.match(/_csrf=([^(;|$)]+)/);
-  if (csrfToken)
-    data.csrf_token = csrfToken[1];
-  else
-    data.csrf_token = "";
+  const csrfToken = cookie.match(/_csrf=([^(;|$)]+)/)
+  if (csrfToken) data.csrf_token = csrfToken[1]
+  else data.csrf_token = ''
 
-  const proxy = cookie.split("__proxy__")[1];
-  cookie = cookie.split("__proxy__")[0];
+  const proxy = cookie.split('__proxy__')[1]
+  cookie = cookie.split('__proxy__')[0]
 
-  const encryptedData = Encrypt(data);
+  const encryptedData = Encrypt(data)
   const options = {
     url: `http://${host}${path}`,
     method: method,
     headers: {
-      "Accept": "*/*",
-      "Accept-Language": "zh-CN,zh;q=0.8,gl;q=0.6,zh-TW;q=0.4",
-      "Connection": "keep-alive",
-      "Content-Type": "application/x-www-form-urlencoded",
-      "Referer": "http://music.163.com",
-      "Host": "music.163.com",
-      "Cookie": cookie,
-      "User-Agent": randomUserAgent()
+      Accept: '*/*',
+      'Accept-Language': 'zh-CN,zh;q=0.8,gl;q=0.6,zh-TW;q=0.4',
+      Connection: 'keep-alive',
+      'Content-Type': 'application/x-www-form-urlencoded',
+      Referer: 'http://music.163.com',
+      Host: 'music.163.com',
+      Cookie: cookie,
+      'User-Agent': randomUserAgent()
     },
     body: queryString.stringify({
       params: encryptedData.params,
       encSecKey: encryptedData.encSecKey
     }),
     proxy: proxy
-  };
+  }
   console.log(
     `[request] ${options.method} ${options.url} proxy:${options.proxy}`
-  );
+  )
 
   request(options, function(error, res, body) {
     if (error) {
-      console.error(error);
-      errorCallback(error);
+      console.error(error)
+      errorCallback(error)
     } else {
-      let cookie = res.headers["set-cookie"] || [];
-      cookie = cookie.map(x => x.replace(/\s*Domain=[^(;|$)]+;*/, ""));
-      callback(body, cookie);
+      let cookie = res.headers['set-cookie'] || []
+      cookie = cookie.map(x => x.replace(/\s*Domain=[^(;|$)]+;*/, ''))
+      try {
+        const response = JSON.parse(body)
+        if (response.code == '301') {
+          callback(
+            JSON.stringify({
+              ...response,
+              msg: '需要登陆'
+            }),
+            cookie
+          )
+        } else {
+          callback(body, cookie)
+        }
+      } catch (err) {
+        callback(body, cookie)
+      }
     }
-  });
+  })
 }
 
 module.exports = {
   request,
   createWebAPIRequest
-};
+}