fix(route): segmentfault return empty and refactor to V2 (#9270)

* fix(route): return empty and refactor to V2

* docs: update segmentfault user example

lib/v2/segmentfault/channel.js

@@ -0,0 +1,46 @@
+const got = require('@/utils/got');
+const cheerio = require('cheerio');
+const { parseDate } = require('@/utils/parse-date');
+
+const host = 'https://segmentfault.com';
+
+module.exports = async (ctx) => {
+    const name = ctx.params.name;
+
+    const link = `${host}/channel/${name}`;
+    const response = await got(link);
+    const $ = cheerio.load(response.data);
+
+    const channel_name = $('#leftNav > a.active').text();
+
+    const list = $('ul.bg-transparent.list-group.list-group-flush > li')
+        .slice(0, 10)
+        .map((_, item) => ({
+            link: new URL($(item).find('div.content > h5 > a').attr('href'), host).href,
+            title: $(item).find('div.content > h5 > a').text(),
+            author: $(item).find('span.name').text(),
+        }))
+        .get();
+
+    const items = await Promise.all(
+        list.map((item) =>
+            ctx.cache.tryGet(item.link, async () => {
+                const detailResponse = await got(item.link);
+                const content = cheerio.load(detailResponse.data);
+
+                item.description = content('article')
+                    .html()
+                    .replace(/data-src="/g, `src="${host}`);
+                item.pubDate = parseDate(content('time').attr('datetime'));
+
+                return item;
+            })
+        )
+    );
+
+    ctx.state.data = {
+        title: `segmentfault - ${channel_name}`,
+        link,
+        item: items,
+    };
+};