增加：看雪论坛主题帖 (#854)

docs/README.md

@@ -602,6 +602,31 @@ GitHub 官方也提供了一些 RSS:
 
 <route name="博文" author="imlonghao" example="/linkedkeeper/sub/1" path="/linkedkeeper/:type/:id?" :paramsDesc="['博文分类, 为 URL 中 `.action` 的文件名', '分区或标签的 ID, 对应 URL 中的 `sid` 或 `tid`']"/>
 
+### 看雪
+
+<route name="论坛" author="renzhexigua" example="/pediy/topic/android/digest" path="/pediy/topic/:category?/:type?" :paramsDesc="['版块, 缺省为`all`', '类型, 缺省为`latest`']"/>
+
+| 版块         | category   |
+| ------------ | ---------- |
+| 智能设备     | iot        |
+| 区块链安全   | blockchain |
+| Android 安全 | android    |
+| iOS 安全     | ios        |
+| 软件逆向     | re         |
+| 编程技术     | coding     |
+| 加壳脱壳     | unpack     |
+| 密码算法     | crypto     |
+| 二进制漏洞   | vuln       |
+| CrackMe      | crackme    |
+| Pwn          | pwn        |
+| WEB 安全     | web        |
+| 全站         | all        |
+
+| 类型     | type   |
+| -------- | ------ |
+| 最新主题 | latest |
+| 精华主题 | digest |
+
 ## 直播
 
 ### 哔哩哔哩直播

router.js

@@ -614,4 +614,7 @@ router.get('/ft/chinese/:channel?', require('./routes/ft/chinese'));
 // The Verge
 router.get('/verge', require('./routes/verge/index'));
 
+// 看雪
+router.get('/pediy/topic/:category?/:type?', require('./routes/pediy/topic'));
+
 module.exports = router;

routes/pediy/topic.js

@@ -0,0 +1,95 @@
+const axios = require('../../utils/axios');
+const dateHelper = require('../../utils/date');
+const cheerio = require('cheerio');
+
+const baseUrl = 'https://bbs.pediy.com/';
+const categoryId = {
+    iot: [128, '智能设备'],
+    blockchain: [172, '区块链安全'],
+    android: [161, 'Android安全'],
+    ios: [166, 'iOS安全'],
+    re: [4, '软件逆向'],
+    coding: [41, '编程技术'],
+    unpack: [88, '加壳脱壳'],
+    crypto: [132, '密码算法'],
+    vuln: [150, '二进制漏洞'],
+    crackme: [37, 'CrackMe'],
+    pwn: [171, 'Pwn'],
+    web: [151, 'WEB安全'],
+};
+
+module.exports = async (ctx) => {
+    const category = ctx.params.category || 'all';
+    const type = ctx.params.type || 'latest';
+    let path;
+    let title;
+    let isSpecific;
+
+    if (categoryId.hasOwnProperty(category)) {
+        isSpecific = true;
+        if (type === 'digest') {
+            // type为digest时只获取精华帖
+            path = `forum-${categoryId[category][0]}-1.htm?digest=1`;
+            title = `看雪论坛精华主题 - ${categoryId[category][1]}`;
+        } else {
+            // type为空/非法/latest时则只获取最新帖
+            path = `forum-${categoryId[category][0]}.html`;
+            title = `看雪论坛最新主题 - ${categoryId[category][1]}`;
+        }
+    } else {
+        // category未知时则获取全站最新帖
+        isSpecific = false;
+        if (category === 'digest') {
+            path = 'new-digest.htm';
+            title = '看雪论坛精华主题';
+        } else {
+            path = 'new-tid.htm';
+            title = '看雪论坛最新主题';
+        }
+    }
+
+    const response = await axios({
+        method: 'get',
+        url: baseUrl + path,
+        headers: {
+            Referer: baseUrl,
+        },
+    });
+
+    const data = response.data;
+    const $ = cheerio.load(data);
+
+    ctx.state.data = {
+        title: `${title}`,
+        link: baseUrl + path,
+        item: $('.thread')
+            .map((_, elem) => {
+                const subject = $('.subject a', elem).eq(1);
+                const author = $('.username', elem).eq(0);
+
+                let pubDate = $('.date', elem).eq(0);
+                if (pubDate.text().indexOf('前') !== -1) {
+                    pubDate = dateHelper(pubDate.text(), 8);
+                } else {
+                    pubDate = pubDate.text();
+                }
+
+                let topic;
+                if (isSpecific) {
+                    topic = categoryId[category][1];
+                } else {
+                    topic = $('.subject a.small', elem)
+                        .eq(0)
+                        .text();
+                }
+
+                return {
+                    title: subject.text(),
+                    link: baseUrl + subject.attr('href'),
+                    pubDate: pubDate,
+                    description: `作者: ${author.text()} 版块: ${topic}`,
+                };
+            })
+            .get(),
+    };
+};