增加新京报订阅及其与3DM的说明文档 (#297)

* Add 3dm news center.

* Modify router name, fix timezone issue.

* Add entries in Readme.
Add 新京报

README.md

@@ -137,6 +137,7 @@ RSSHub 是一个轻量、易于扩展的 RSS 生成器，可以给任何奇奇
 -   UU 看书
     -   小说章节
 -   3dm
+    -   新闻中心
     -   新闻
     -   攻略
     -   下载
@@ -150,6 +151,8 @@ RSSHub 是一个轻量、易于扩展的 RSS 生成器，可以给任何奇奇
     -   学术讲座
     -   通知公告
     -   教务信息
+-   新京报
+    -   快讯
 
 ## 鸣谢
 

docs/README.md

@@ -1087,6 +1087,14 @@ language，语言，可在 [Trending 页](https://github.com/trending/javascript
 
 ## 3dm
 
+### 新闻中心
+
+举例: [https://rsshub.app/3dm/news](https://rsshub.app/3dm/news)
+
+路由: `/3dm/news`
+
+参数: 无
+
 ### 新闻
 
 举例: [https://rsshub.app/3dm/detroitbecomehuman/news](https://rsshub.app/3dm/detroitbecomehuman/news)
@@ -1182,3 +1190,11 @@ id, 专辑 id, 可在对应专辑页面的 URL 中找到
 路由: `/shmtu/jwc/:type`
 
 参数: type，1 为教务新闻,2 为教务公告
+
+## 新京报
+
+举例: [https://rsshub.app/bjnews/realtime](https://rsshub.app/bjnews/realtime)
+
+路由： `/bjnews/:category`
+
+参数: category，新京报的栏目名，点击对应栏目后在地址栏找到

router.js

@@ -302,4 +302,7 @@ router.get('/shmtu/events', require('./routes/shmtu/events'));
 router.get('/shmtu/notes', require('./routes/shmtu/notes'));
 router.get('/shmtu/jwc/:type', require('./routes/shmtu/jwc'));
 
+// 新京报
+router.get('/bjnews/:cat', require('./routes/bjnews/news'));
+
 module.exports = router;

routes/bjnews/news.js

@@ -0,0 +1,51 @@
+const cheerio = require('cheerio');
+const config = require('../../config');
+const axios = require('../../utils/axios');
+
+const axios_ins = axios.create({
+    headers: {
+        'User-Agent': config.ua,
+    },
+});
+module.exports = async (ctx) => {
+    const url = `http://www.bjnews.com.cn/${ctx.params.cat}`;
+    const res = await axios_ins.get(url);
+    const data = res.data;
+    const $ = cheerio.load(data);
+    const list = $('#news_ul li');
+    const out = [];
+    const proList = [];
+    let time, title, itemUrl;
+    for (let i = 0; i < (list.length <= 20 ? list.length : 20); i++) {
+        const $ = cheerio.load(list[i]);
+        time = $('p').text();
+        title = $('a').text();
+        itemUrl = $('a').attr('href');
+        const cache = await ctx.cache.get(itemUrl);
+        if (cache) {
+            out.push(cache);
+            continue;
+        }
+        const single = {
+            title: title,
+            pubDate: new Date(time).toUTCString(),
+            link: itemUrl,
+            guid: itemUrl,
+        };
+        out.push(single);
+        ctx.cache.set(itemUrl, single, 24 * 60 * 60);
+        proList.push(axios_ins.get(itemUrl));
+    }
+    const responses = await axios.all(proList);
+    for (let i = 0; i < responses.length; i++) {
+        const res = responses[i];
+        const data = res.data;
+        const $ = cheerio.load(data);
+        out[i].description = $('#main .content').html();
+    }
+    ctx.state.data = {
+        title: $('title').text(),
+        link: url,
+        item: out,
+    };
+};