feat(route): add 51cto (#14958)

* feat(route): add 51cto

增加了51cto的推荐列表

* Update rss.ts

* Update rss.ts

* fix(route): fix 51cto

* Update recommend.ts

调整 51cto，使用API来生成RSS。

* Update recommend.ts

* fix: request signing

---------

Co-authored-by: pull[bot] <39814207+pull[bot]@users.noreply.github.com>

lib/routes/51cto/namespace.ts

@@ -0,0 +1,6 @@
+import type { Namespace } from '@/types';
+
+export const namespace: Namespace = {
+    name: '51CTO',
+    url: '51cto.com',
+};

lib/routes/51cto/recommend.ts

@@ -0,0 +1,52 @@
+import { Route } from '@/types';
+import { parseDate } from '@/utils/parse-date';
+import got from '@/utils/got';
+import { getToken, sign } from './utils';
+
+export const route: Route = {
+    path: '/index/recommend',
+    categories: ['programming'],
+    example: '/51cto/index/recommend',
+    radar: [
+        {
+            source: ['51cto.com/'],
+        },
+    ],
+    name: '推荐',
+    maintainers: ['cnkmmk'],
+    handler,
+    url: '51cto.com/',
+};
+
+async function handler(ctx) {
+    const url = 'https://api-media.51cto.com';
+    const requestPath = 'index/index/recommend';
+    const token = (await getToken()) as string;
+    const timestamp = Date.now();
+    const params = {
+        page: 1,
+        page_size: ctx.req.query('limit') ? Number.parseInt(ctx.req.query('limit'), 10) : 50,
+        limit_time: 0,
+        name_en: '',
+    };
+    const response = await got(`${url}/${requestPath}`, {
+        searchParams: {
+            ...params,
+            timestamp,
+            token,
+            sign: sign(requestPath, params, timestamp, token),
+        },
+    });
+    const list = response.data.data.data.list;
+    return {
+        title: '51CTO',
+        link: 'https://www.51cto.com/',
+        description: '51cto - 推荐',
+        item: list.map((item) => ({
+            title: item.title,
+            link: item.url,
+            pubDate: parseDate(item.pubdate, +8),
+            description: item.abstract,
+        })),
+    };
+}

lib/routes/51cto/utils.ts

@@ -0,0 +1,21 @@
+import ofetch from '@/utils/ofetch';
+import cache from '@/utils/cache';
+import md5 from '@/utils/md5';
+
+export const getToken = () =>
+    cache.tryGet(
+        '51cto:token',
+        async () => {
+            const response = await ofetch('https://api-media.51cto.com/api/token-get');
+            return response.data.data.token;
+        },
+        3600,
+        false
+    );
+
+export const sign = (requestPath: string, payload: Record<string, any> = {}, timestamp: number, token: string) => {
+    payload.timestamp = timestamp;
+    payload.token = token;
+    const sortedParams = Object.keys(payload).sort();
+    return md5(md5(requestPath) + md5(sortedParams + md5(token) + timestamp));
+};