feat: 优化每日环球展览 iMuseum title 字段 (#2279)

* fix: 修复路由参数默认值

* feat: 优化 title 字段

docs/travel.md

@@ -37,7 +37,7 @@ IATA 国际航空运输协会机场代码, 参见[维基百科 国际航空运
 
 ### 展览信息
 
-<Route author="sinchang" example="/imuseum/shanghai/all" path="/imuseum/:city/:type" :paramsDesc="['如 shanghai, beijing', '不填则默认为 `all`']">
+<Route author="sinchang" example="/imuseum/shanghai/all" path="/imuseum/:city/:type?" :paramsDesc="['如 shanghai, beijing', '不填则默认为 `all`']">
 
 | 全部 | 最新   | 热门 | 即将结束 | 即将开始 | 已结束   |
 | ---- | ------ | ---- | -------- | -------- | -------- |

lib/router.js

@@ -469,7 +469,7 @@ router.get('/google/doodles/:language?', require('./routes/google/doodles'));
 router.get('/pigtails', require('./routes/pigtails'));
 
 // 每日环球展览 iMuseum
-router.get('/imuseum/:city/:type', require('./routes/imuseum'));
+router.get('/imuseum/:city/:type?', require('./routes/imuseum'));
 
 // AppStore
 router.get('/appstore/update/:country/:id', require('./routes/appstore/update'));

lib/routes/imuseum/index.js

@@ -20,9 +20,15 @@ module.exports = async (ctx) => {
     });
     const data = response.data;
     const $ = cheerio.load(data);
+
+    const context = $('.imsm-section');
+    const city_name = context.find('a > h3').text();
+    const exhibition_type = context.find('li.active > a').text();
+    const title = `${city_name} - ${exhibition_type} - 每日环球展览 iMuseum`;
+
     const list = $('.imsm-entries.list li');
     ctx.state.data = {
-        title: `${$('title').text()}`,
+        title,
         link: url,
         description: $('meta[name="description"]').attr('content'),
         item: