add router /wenku8/volume (#8471)

docs/reading.md

@@ -303,6 +303,10 @@ count 的取值范围为 1-12，为防止请求次数过多，推荐设置为 5
 
 <Route author="zsakvo" example="/wenku8/chapter/74" path="/wenku8/chapter/:id" :paramsDesc="['小说 id, 可在对应小说页 URL 中找到']"/>
 
+### 最新卷
+
+<Route author="huangliangshusheng" example="/wenku8/volume/1163" path="/wenku8/volume/:id" :paramsDesc="['小说 id, 可在对应小说页 URL 中找到']"/>
+
 ## 生物帮
 
 ### 所有栏目

lib/router.js

@@ -1433,6 +1433,7 @@ router.get('/gaoqing/latest', lazyloadRouteHandler('./routes/gaoqing/latest'));
 
 // 轻小说文库
 router.get('/wenku8/chapter/:id', lazyloadRouteHandler('./routes/wenku8/chapter'));
+router.get('/wenku8/volume/:id', lazyloadRouteHandler('./routes/wenku8/volume'));
 
 // 鲸跃汽车
 router.get('/whalegogo/home', lazyloadRouteHandler('./routes/whalegogo/home'));

lib/routes/wenku8/volume.js

@@ -0,0 +1,52 @@
+const got = require('@/utils/got');
+const cheerio = require('cheerio');
+const iconv = require('iconv-lite');
+
+module.exports = async (ctx) => {
+    const aid = ctx.params.id;
+    const novel_url = `https://www.wenku8.net/novel/${parseInt(aid / 1000)}/${aid}/index.htm`;
+    const $ = cheerio.load(await get(novel_url));
+
+    const novel_name = $('#title').text();
+
+    const volume_list = $('.vcss');
+    const last_volume = $(volume_list[volume_list.length - 1]);
+    const vid = last_volume.parent().next().find('a')[0].attribs.href.replace('.htm', '');
+
+    const volume_url = `https://dl.wenku8.com/packtxt.php?aid=${aid}&vid=${vid}&charset=gbk`;
+    const item_list = await ctx.cache.tryGet(volume_url, async () => {
+        const result = await get(volume_url);
+        const chapter_list = [...result.matchAll(/ {2}(\S.*)\r\n([\S\s]+?)\r\n\r\n/g)];
+        return chapter_list
+            .filter((chapter) => chapter[2].trim())
+            .reverse()
+            .map((chapter) => ({
+                title: chapter[1],
+                description: format_description(chapter[2]),
+                guid: Buffer.from(`${vid}${chapter[1]}`).toString('base64'),
+            }));
+    });
+
+    ctx.state.data = {
+        title: `轻小说文库 ${novel_name} 最新卷`,
+        link: novel_url,
+        item: item_list,
+    };
+};
+
+const get = async (url) => {
+    const response = await got({
+        method: 'get',
+        url,
+        responseType: 'buffer',
+    });
+
+    return iconv.decode(response.data, 'gbk');
+};
+
+const format_description = (str) =>
+    str
+        .split('\r\n')
+        .filter((line) => line.trim())
+        .map((line) => `<p>${line.trim()}</p>`)
+        .join('');