今日头条关键词搜索 (#168)

* 添加今日头条关键词搜索

* 添加今日头条关键词搜索

* 添加今日头条关键词搜索文档

docs/README.md

@@ -680,6 +680,14 @@ key: 产品密钥
 
 参数: id，独家号 id，可在对应独家号页 URL 中找到
 
+## 今日头条
+
+举例: [https://rsshub.app/jinritoutiao/keyword/ai](https://rsshub.app/jinritoutiao/keyword/ai)
+
+路由: `/jinritoutiao/keyword/:keyword`
+
+参数: keyword，关键词
+
 ## 极客时间
 
 ### 专栏文章

router.js

@@ -170,6 +170,9 @@ router.get('/biquge/novel/latestchapter/:id', require('./routes/biquge/chapter')
 router.get('/toutiao/today', require('./routes/toutiao/today'));
 router.get('/toutiao/user/:id', require('./routes/toutiao/user'));
 
+// 今日头条
+router.get('/jinritoutiao/keyword/:keyword', require('./routes/jinritoutiao/keyword'));
+
 // Disqus
 if (config.disqus && config.disqus.api_key) {
     router.get('/disqus/posts/:forum', require('./routes/disqus/posts'));

routes/jinritoutiao/keyword.js

@@ -0,0 +1,30 @@
+const axios = require('axios');
+const config = require('../../config');
+
+module.exports = async (ctx) => {
+    const keyword = ctx.params.keyword;
+
+    const response = await axios({
+        method: 'get',
+        url: `https://www.toutiao.com/search_content/?offset=0&format=json&keyword=${encodeURIComponent(keyword)}&autoload=true&count=20&cur_tab=1&from=search_tab`,
+        headers: {
+            'User-Agent': config.ua,
+        },
+    });
+    let data = response.data.data;
+    data = data.filter(function(item) {
+        return !item.cell_type;
+    });
+
+    ctx.state.data = {
+        title: `今日头条: ${keyword}`,
+        link: `https://www.toutiao.com/search/?keyword=${keyword}`,
+        description: `${keyword}`,
+        item: data.map((item) => ({
+            title: `${item.media_name}: ${item.title}`,
+            description: `${item.abstract}`,
+            pubDate: `${new Date(parseInt(item.create_time) * 1000)}`,
+            link: `${item.article_url}`,
+        })),
+    };
+};