rss: add readhub (DIYgod#204)

* rss: add readhub

* rss: adjust readhub router

README.md

@@ -117,6 +117,8 @@ RSSHub 是一个轻量、易于扩展的 RSS 生成器，可以给任何奇奇
     *   最热/最新主题
 *   Telegram
     *   频道
+*   Readhub
+    *   分类
 
 ## 鸣谢
 

docs/README.md

@@ -906,3 +906,17 @@ key: 产品密钥
 路由: `/telegram/channel/:username`
 
 参数: username，频道 username
+
+## Readhub
+
+### 分类
+
+举例: [https://rsshub.app/readhub/category/topic](https://rsshub.app/readhub/category/topic)
+
+路由: `/readhub/category/:category`
+
+参数: category，分类名
+
+| 热门话题 | 科技动态 | 开发者资讯 | 区块链快讯 |
+| -------- | -------- | ---------- | ---------- |
+| topic    | news     | technews   | blockchain |

router.js

@@ -233,4 +233,7 @@ if (config.telegram && config.telegram.token) {
     logger.warn('Telegram RSS is disabled for lacking config.');
 }
 
+// readhub
+router.get('/readhub/category/:category', require('./routes/readhub/category'));
+
 module.exports = router;

routes/readhub/category.js

@@ -0,0 +1,46 @@
+const axios = require('../../utils/axios');
+const config = require('../../config');
+
+module.exports = async (ctx) => {
+    const category = ctx.params.category;
+
+    let title;
+    switch (category) {
+        case 'topic':
+            title = '热门话题';
+            break;
+        case 'news':
+            title = '科技动态';
+            break;
+        case 'technews':
+            title = '开发者资讯';
+            break;
+        case 'blockchain':
+            title = '区块链快讯';
+            break;
+        default:
+            break;
+    }
+
+    const response = await axios({
+        method: 'get',
+        url: `https://api.readhub.me/${category}`,
+        headers: {
+            'User-Agent': config.ua,
+        },
+    });
+
+    const data = response.data;
+
+    ctx.state.data = {
+        title: `Readhub-${title}`,
+        link: 'https://readhub.me',
+        item: data.data.map((item) => ({
+            title: item.title,
+            pubDate: new Date(item.publishDate).toUTCString(),
+            description: item.summary,
+            guid: item.id,
+            link: item.url || item.newsArray[0].url,
+        })),
+    };
+};