feat: add v2ex post (#2655)

docs/programming.md

@@ -220,6 +220,10 @@ GitHub 官方也提供了一些 RSS:
 
 <Route author="WhiteWorld" example="/v2ex/topics/latest" path="/v2ex/topics/:type" :paramsDesc="['hot 或 latest']"/>
 
+### 帖子
+
+<Route author="kt286" example="/v2ex/post/584403" path="/v2ex/post/:postid" :paramsDesc="['帖子ID，在 URL 可以找到']"/>
+
 ## 安全客
 
 ::: tip 提示

lib/router.js

@@ -233,6 +233,7 @@ router.get('/kingkong/room/:id', require('./routes/kingkong/room'));
 
 // v2ex
 router.get('/v2ex/topics/:type', require('./routes/v2ex/topics'));
+router.get('/v2ex/post/:postid', require('./routes/v2ex/post'));
 
 // Telegram
 router.get('/telegram/channel/:username', require('./routes/telegram/channel'));

lib/routes/v2ex/post.js

@@ -0,0 +1,39 @@
+const got = require('@/utils/got');
+const cheerio = require('cheerio');
+
+module.exports = async (ctx) => {
+    const postid = ctx.params.postid;
+    const pageUrl = `https://www.v2ex.com/t/${postid}`;
+
+    const response = await got({
+        method: 'get',
+        url: pageUrl,
+    });
+
+    const $ = cheerio.load(response.data);
+    const list = $('[id^="r_"]').get();
+
+    ctx.state.data = {
+        title: `V2EX-${$('.header h1').text()}`,
+        link: pageUrl,
+        description: $('.topic_content').text(),
+        item: list
+            .map((item) => {
+                const post = $(item);
+                const reply_content = post.find('.reply_content').first();
+                const no = post.find('.no').first();
+
+                return {
+                    title: `#${no.text()} ${reply_content.text()}`,
+                    description: reply_content.html(),
+                    guid: post.attr('id'),
+                    link: `${pageUrl}#${post.attr('id')}`,
+                    author: post
+                        .find('.dark')
+                        .first()
+                        .text(),
+                };
+            })
+            .reverse(),
+    };
+};