feat: 新增数据库内核月报 (#2709)

* feat: 新增数据库内核月报

* format

lib/routes/aliyun/database_month.js

@@ -0,0 +1,53 @@
+const got = require('@/utils/got');
+const cheerio = require('cheerio');
+
+module.exports = async (ctx) => {
+    const url = 'http://mysql.taobao.org/monthly/';
+    const response = await got({ method: 'get', url });
+    const $ = cheerio.load(response.data);
+
+    const list = $("ul[class='posts'] > li")
+        .map((i, e) => {
+            const element = $(e);
+            const title = element
+                .find('a')
+                .text()
+                .trim();
+            const link =
+                'http://mysql.taobao.org' +
+                element
+                    .find('a')
+                    .attr('href')
+                    .trim();
+            return {
+                title: title,
+                description: '',
+                link: link,
+            };
+        })
+        .get();
+
+    const result = await Promise.all(
+        list.map(async (item) => {
+            const link = item.link;
+
+            const cache = await ctx.cache.get(link);
+            if (cache) {
+                return Promise.resolve(JSON.parse(cache));
+            }
+
+            const itemReponse = await got.get(link);
+            const itemElement = cheerio.load(itemReponse.data);
+            item.description = itemElement('.content').html();
+
+            ctx.cache.set(link, JSON.stringify(item));
+            return Promise.resolve(item);
+        })
+    );
+
+    ctx.state.data = {
+        title: $('title').text(),
+        link: url,
+        item: result.reverse(),
+    };
+};