const Router = require("koa-router"); const tiebaRouter = new Router(); const axios = require("axios"); const { get, set, del } = require("../utils/cacheData"); // 接口信息 const routerInfo = { name: "tieba", title: "百度贴吧", subtitle: "热议榜", }; // 缓存键名 const cacheKey = "tiebaData"; // 调用时间 let updateTime = new Date().toISOString(); // 调用路径 const url = "https://tieba.baidu.com/hottopic/browse/topicList"; // 数据处理 const getData = (data) => { if (!data) return []; return data.map((v) => { return { id: v.topic_id, title: v.topic_name, desc: v.topic_desc, pic: v.topic_pic, hot: v.discuss_num, url: v.topic_url, mobileUrl: v.topic_url, }; }); }; // 贴吧热议榜 tiebaRouter.get("/tieba", async (ctx) => { console.log("获取贴吧热议榜"); try { // 从缓存中获取数据 let data = await get(cacheKey); const from = data ? "cache" : "server"; if (!data) { // 如果缓存中不存在数据 console.log("从服务端重新获取贴吧热议榜"); // 从服务器拉取数据 const response = await axios.get(url); data = getData(response.data.data.bang_topic.topic_list); updateTime = new Date().toISOString(); // 将数据写入缓存 await set(cacheKey, data); } ctx.body = { code: 200, message: "获取成功", ...routerInfo, from, total: data.length, updateTime, data, }; } catch (error) { console.error(error); ctx.body = { code: 500, ...routerInfo, message: "获取失败", }; } }); // 贴吧热议榜 - 获取最新数据 tiebaRouter.get("/tieba/new", async (ctx) => { console.log("获取贴吧热议榜 - 最新数据"); try { // 从服务器拉取最新数据 const response = await axios.get(url); const newData = getData(response.data.data.bang_topic.topic_list); updateTime = new Date().toISOString(); console.log("从服务端重新获取贴吧热议榜"); // 返回最新数据 ctx.body = { code: 200, message: "获取成功", ...routerInfo, total: newData.length, updateTime, data: newData, }; // 删除旧数据 await del(cacheKey); // 将最新数据写入缓存 await set(cacheKey, newData); } catch (error) { // 如果拉取最新数据失败,尝试从缓存中获取数据 console.error(error); const cachedData = await get(cacheKey); if (cachedData) { ctx.body = { code: 200, message: "获取成功", ...routerInfo, total: cachedData.length, updateTime, data: cachedData, }; } else { // 如果缓存中也没有数据,则返回错误信息 ctx.body = { code: 500, ...routerInfo, message: "获取失败", }; } } }); tiebaRouter.info = routerInfo; module.exports = tiebaRouter;