fix: some bugs in discuz (#3951)

docs/bbs.md

@@ -16,10 +16,20 @@ pageClass: routes
 
 ## Discuz
 
-### 通用子版块
+### 通用子版块-自动检测
 
 <Route author="junfengP" example="/discuz/http%3a%2f%2fwww.u-share.cn%2fforum.php%3fmod%3dforumdisplay%26fid%3d56" path="/discuz/:link" :paramsDesc="['子版块链接， 需要手动Url编码']"/>
 
+### 通用子版块-指定版本
+
+<Route author="junfengP" example="/discuz/x/https%3a%2f%2fwww.52pojie.cn%2fforum-16-1.html" path="/discuz/:ver/:link" :paramsDesc="['discuz版本类型，见下表','子版块链接， 需要手动Url编码']" >
+
+| Discuz X 系列 | Discuz 7.x 系列 |
+| ------------- | --------------- |
+| x             | 7               |
+
+</Route>
+
 ## MCBBS
 
 ### 版块

docs/en/bbs.md

@@ -3,3 +3,19 @@ pageClass: routes
 ---
 
 # BBS
+
+## Discuz
+
+### General Subforum - Auto detection
+
+<Route author="junfengP" example="/discuz/http%3a%2f%2fwww.u-share.cn%2fforum.php%3fmod%3dforumdisplay%26fid%3d56" path="/discuz/:link" :paramsDesc="['link of subforum, require url encoded ']"/>
+
+### General Subforum - Manual version
+
+<Route author="junfengP" example="/discuz/x/https%3a%2f%2fwww.52pojie.cn%2fforum-16-1.html" path="/discuz/:ver/:link" :paramsDesc="['discuz version，see below table','link of subforum, require url encoded']" >
+
+| Discuz X Series | Discuz 7.x Series |
+| --------------- | ----------------- |
+| x               | 7                 |
+
+</Route>

lib/router.js

@@ -2152,6 +2152,7 @@ router.get('/gbcc/trust', require('./routes/gbcc/trust'));
 router.get('/apnews/topics/:topic', require('./routes/apnews/topics'));
 
 // discuz
+router.get('/discuz/:ver([7|x])/:link(.*)', require('./routes/discuz/discuz'));
 router.get('/discuz/:link(.*)', require('./routes/discuz/discuz'));
 
 // China Dialogue 中外对话

lib/routes/discuz/discuz.js

@@ -44,6 +44,7 @@ async function load(baseUrl, itemLink, ctx, charset) {
 
 module.exports = async (ctx) => {
     let link = ctx.params.link;
+    const ver = ctx.params.ver ? ctx.params.ver.toUpperCase() : undefined;
     link = link.replace(/:\/\//, ':/').replace(/:\//, '://');
 
     const response = await got.get(link);
@@ -52,18 +53,18 @@ module.exports = async (ctx) => {
     let charset = 'utf-8';
     for (const attr of contentType.split(';')) {
         if (attr.indexOf('charset=') >= 0) {
-            charset = attr.split('=').pop();
+            charset = attr
+                .split('=')
+                .pop()
+                .toLowerCase();
         }
     }
     const responseData = charset === 'utf-8' ? response.data : iconv.decode((await got.get({ url: link, responseType: 'buffer' })).data, charset);
     const $ = cheerio.load(responseData);
     const title = $('head > title').text();
+    const version = ver ? 'DISCUZ! ' + ver : $('head > meta[name=generator]').attr('content');
     let process;
-    if (
+    if (version.toUpperCase().startsWith('DISCUZ! 7')) {
-        $('div#footer p em')
-            .text()
-            .startsWith('7')
-    ) {
         // discuz 7.x 系列
         // 支持全文抓取，限制抓取页面5个
         const list = $('tbody[id^="normalthread"] tr')
@@ -82,12 +83,7 @@ module.exports = async (ctx) => {
                 return Promise.resolve(Object.assign({}, single, detail));
             })
         );
-    } else if (
+    } else if (version.toUpperCase().startsWith('DISCUZ! X')) {
-        $('div#frt p em')
-            .text()
-            .toUpperCase()
-            .startsWith('X')
-    ) {
         // discuz X 系列
         // 支持全文抓取，限制抓取页面5个
         const list = $('tbody[id^="normalthread"] tr')