index.js

/**
 * Functions for query data from NHentai API
 * @param {int} id Gallery ID
 */
const getRawData = async id => {
  try {
    let isCacheFound = false
    let cacheRes
    // Read file from cache
    if (fs.existsSync('.tmp/crawler.json')) {
      const reader = fs.readFileSync('.tmp/crawler.json', 'utf8')
      const objects = JSON.parse(reader)

      _.each(objects, object => {
        if (object.data.id === id && object.status === 'success') {
          isCacheFound = true
          cacheRes = object
        }
      })
    }

    if (isCacheFound) {
      return cacheRes
    } else {
      // Using reverse proxy server to avoid CORS issue
      const out = await axios.get(`https://nh-express-git-master.rayriffy.now.sh/api/gallery/${id}`)
      return {
        status: 'success',
        data: {
          id: id,
          raw: out.data,
        },
      }
    }
  } catch (err) {
    console.log(`cannot process ${id} with code ${err.code}`)
    return {
      status: 'failure',
      data: {
        id: id,
      },
    }
  }
}