增加21财经的频道RSS (#1855)

docs/traditional-media.md

@@ -209,3 +209,7 @@ category 对应的关键词有
 ## 半月谈
 
 <Route name="板块" author="LogicJake" example="/banyuetan/jicengzhili" path="/banyuetan/:name" :paramsDesc="['板块名称，可在 URL 中找到']"/>
+
+## 21 财经
+
+<Route name="频道" author="brilon" example="/21caijing/channel/readnumber" path="/21caijing/channel/:name" :paramsDesc="['频道名称，可在[https://m.21jingji.com/](https://m.21jingji.com/)页面URL中找到']"/>

lib/router.js

@@ -1237,4 +1237,7 @@ router.get('/mobdata/report', require('./routes/mobdata/report'));
 // 谷雨
 router.get('/tencent/guyu/channel/:name', require('./routes/tencent/guyu/channel'));
 
+// 21财经
+router.get('/21caijing/channel/:name', require('./routes/21caijing/channel'));
+
 module.exports = router;

lib/routes/21caijing/channel.js

@@ -0,0 +1,74 @@
+const axios = require('../../utils/axios');
+const date = require('../../utils/date');
+const cheerio = require('cheerio');
+
+module.exports = async (ctx) => {
+    const channel = ctx.params.name;
+    const pageUrl = `https://m.21jingji.com/channel/${channel}`;
+
+    const response = await axios({
+        method: 'get',
+        url: pageUrl,
+    });
+
+    const $ = cheerio.load(response.data);
+    const channelName = $(`div.nav a[href='/channel/${channel}']`).text();
+    const list = $('div.news_list>a')
+        .slice(0, 5)
+        .map((i, e) => $(e).attr('href'))
+        .get();
+
+    const out = await Promise.all(
+        list.map(async (link) => {
+            const cache = await ctx.cache.get(link);
+            if (cache) {
+                return Promise.resolve(JSON.parse(cache));
+            }
+
+            const response = await axios({
+                method: 'get',
+                url: link,
+                headers: {
+                    Referer: pageUrl,
+                },
+            });
+
+            const $ = cheerio.load(response.data);
+
+            $('img').each((index, elem) => {
+                const $elem = $(elem);
+                const src = $elem.attr('data-original');
+                if (src) {
+                    $elem.attr('src', src);
+                    $elem.removeAttr('data-original');
+                }
+            });
+
+            const div = $('div.editor');
+            if (div) {
+                div.remove();
+            }
+
+            const title = $('h1').text();
+            const dateStr = $('div.newsDate').text();
+            const content = $('div.txtContent').html();
+
+            const single = {
+                pubDate: date(dateStr),
+                link: link,
+                title: title,
+                description: content,
+            };
+
+            ctx.cache.set(link, JSON.stringify(single), 24 * 60 * 60);
+            return Promise.resolve(single);
+        })
+    );
+
+    ctx.state.data = {
+        title: '21财经-' + channelName,
+        link: pageUrl,
+        description: '21财经-' + channelName,
+        item: out,
+    };
+};