artsite/routes/v2/video-coloring-page.js

var express = require('express');
var router = express.Router();
const models = require('../../models');
const common = require('./common');
const redis = require('../../libs/redis');
const config = require('../../config/app');

const CACHE_PREFIX = "art_v2";
// const CACHE_EXPIRES = 60; // 60s刷新一次
const CACHE_EXPIRES = 600;

router.get('/', (req, res, next) => {
  (async function () {
    let uri = req.originalUrl.substring(1);
    let cacheKey = `${CACHE_PREFIX}_video-coloring-pages`;
    let htmlData = await redis.getAsync(cacheKey);
    htmlData = null;
    if (!htmlData) {
      let videos = await models.ArtVideoStory
        .find({ enabled: true, seoTitle: { $exists: true } })
        .populate({ path: 'contents', model: 'Art', select: 'name title width height date publishTime tags lastMod publishVersion' })
        .sort({ order: 'asc' })
        .lean()
        .exec();

      let host = config.cdnHost ?? config.resHost;
      for (let doc of videos) {
        doc.poster = `${host}/thumbs/coloring-page/vs-poster/320/${doc._id}.webp`;
        doc.size = doc.contents.length;
        if (doc.seoTitle) {
          try {
            let titleJson = JSON.parse(doc.seoTitle);
            doc.seoTitle = titleJson && titleJson['en'] ? titleJson['en'] : doc.name;
          } catch (e) {
            console.error(e.message);
          }
        } else {
          doc.seoTitle = doc.name;
        }
        if (doc.seoDescription) {
          try {
            let descJson = JSON.parse(doc.seoDescription);
            doc.seoDescription = descJson && descJson['en'] ? descJson['en'] : doc.seoTitle;
          } catch (e) {
            console.error(e.message);
          }
        } else {
          doc.seoDescription = doc.seoTitle;
        }

        common.organizeData(doc.contents);

        delete doc.seoDescription;

        let jsonStr = JSON.stringify(doc, (key, value) => {
          if (key == 'seoTitle' || key == 'seoDescription') {
            value = value.replace(/"/g, '\\\"');
          }
          return value;
        });
        doc.jsonStr = jsonStr;
      }

      pageId = 'Video Coloring Pages';
      const comments = await models.Comment.find({ approved: true, page: pageId }).sort({ createdAt: -1 });
      let data = {
        uri: req.originalUrl,
        data: videos,
        pageId,
        comments,
        dateFormat: common.dateFormat,
      };
      // 渲染EJS模板到内存中
      res.render('v2/video-coloring-pages', data, async (err, html) => {
        if (err) {
          // 如果渲染出错，调用next()传递错误
          return next(err);
        }

        // 渲染成功，存redis, 发送数据到客户端
        htmlData = html;
        try {
          await redis.set(cacheKey, htmlData, 'EX', CACHE_EXPIRES);
        } catch (e) {
          console.error(e);
        }

        res.send(htmlData);
      });
    } else {
      // 缓存命中， 直接发送缓存数据
      res.set({ 'X-From-Cache': 'true' });
      res.send(htmlData);
    }

  })().catch(next);

});



module.exports = router;