增加：油价 (#967)

- 实现 #818

docs/README.md

@@ -2001,3 +2001,7 @@ IATA 国际航空运输协会机场代码, 参见[维基百科 国际航空运
 | hot  | news  | scoff | pic  | tec       | ask      |
 
 </route>
+
+### 油价
+
+<route name="今日油价" author="xyqfer" example="/oilprice/shanghai" path="/oilprice/:area" :paramsDesc="['地区拼音，详见[成品油价格网](http://oil.usd-cny.com/)']"/>

router.js

@@ -689,4 +689,7 @@ router.get('/chouti/:subject?', require('./routes/chouti'));
 // 西安电子科技大学
 router.get('/xidian/jwc/:category?', require('./routes/xidian/jwc'));
 
+// 油价
+router.get('/oilprice/:area', require('./routes/oilprice'));
+
 module.exports = router;

routes/oilprice/index.js

@@ -0,0 +1,65 @@
+const axios = require('../../utils/axios');
+const cheerio = require('cheerio');
+const iconv = require('iconv-lite');
+
+module.exports = async (ctx) => {
+    const { area } = ctx.params;
+    const link = 'http://oil.usd-cny.com/';
+    const response = await axios({
+        method: 'get',
+        url: link,
+        responseType: 'arraybuffer',
+    });
+    const $ = cheerio.load(iconv.decode(response.data, 'gb2312'));
+    const $list = $('.pp')
+        .eq(0)
+        .find('table tbody tr');
+    const resultItem = [];
+    let areaName = '';
+    const updateTime = $('.pm')
+        .text()
+        .split('：')[1];
+    const labelList = $list
+        .eq(0)
+        .find('td')
+        .slice(1)
+        .map((index, item) => $(item).text())
+        .get();
+
+    for (let i = 1; i < $list.length; i++) {
+        if (
+            $list
+                .eq(i)
+                .find('td a')
+                .attr('href') === `http://oil.usd-cny.com/${area}.htm`
+        ) {
+            const $item = $list.eq(i);
+            areaName = $item.find('td a').text();
+            const description = labelList.reduce((description, label, index) => {
+                description += `
+          <strong>${label}:</strong> ${$item
+                    .find('td')
+                    .eq(index + 1)
+                    .text()}<br>
+        `;
+                return description;
+            }, '');
+
+            resultItem.push({
+                title: `${updateTime}-${areaName}油价`,
+                description,
+                link,
+                guid: updateTime,
+                pubDate: new Date(updateTime).toUTCString(),
+            });
+            break;
+        }
+    }
+
+    ctx.state.data = {
+        title: `今日油价查询-${areaName}`,
+        description: '今日汽油价格查询 最新柴油油价实时行情',
+        link,
+        item: resultItem,
+    };
+};