pxder/src/pixiv-login.js

Download illusts from pixiv.net P站插画批量下载器

const Crypto = require('crypto');
const { Base64 } = require('js-base64');
const { stringify } = require('qs');

const LOGIN_URL = 'https://app-api.pixiv.net/web/v1/login';

const randToken = (len = 32) => Crypto.randomBytes(len);
const sha256 = data => Crypto.createHash('sha256').update(data).digest();

const oauthPkce = () => {
  const code_verifier = Base64.fromUint8Array(randToken(), true);
  const code_challenge = Base64.encodeURI(sha256(code_verifier));
  return { code_verifier, code_challenge };
};

module.exports = () => {
  const { code_verifier, code_challenge } = oauthPkce();
  const params = {
    code_challenge,
    code_challenge_method: 'S256',
    client: 'pixiv-android',
  };
  return {
    login_url: `${LOGIN_URL}?${stringify(params)}`,
    code_verifier,
  };
};