Download bilibili 404 images.

bilibili-404s.js

const fs = require('fs');
const path = require('path');
const request = require('superagent');
const mkdirp = require('mkdirp');

async function getMetas() {
  const response = await request.get('https://www.bilibili.com/activity/web/view/data/31');
  const { body } = response;
  if (body.code === 0) {
    return body.data.list;
  }
  throw response;
}

async function download(url, dest) {
  mkdirp.sync(path.dirname(dest));
  const fullUrl = url.indexOf('//') === 0 ? `https:${url}` : url;
  const buffer = await request.get(fullUrl).buffer();
  fs.writeFileSync(dest, buffer.body);
  return buffer.body;
}

async function wait(time = 1000) {
  return await new Promise(resolve => {
    setTimeout(() => { resolve() }, time);
  });
}

async function main(folder = './bilibili-404s') {
  const metas = await getMetas();
  for (let i = 0; i < metas.length; i++) {
    const meta = metas[i];
    const url = meta.data.img;
    const suffix = path.extname(url);
    await download(url, path.resolve(folder, meta.id + suffix));
    await wait(1000);
    console.log(`${meta.id}${suffix} downloaded (${i + 1}/${metas.length}).`);
  }
}

module.exports = main;
if (require.main === module) {
  const folder = process.argv[2];
  main(folder);
}