Grade-Point-Average parse demo for dreamy.jejunu.ac.kr

demo.ts

import request from 'request'

const student_no = 2018123456
const student_pw = 'PASSWORD'

const BaseURL = 'https://dreamy.jejunu.ac.kr'
const rejectUnauthorized = false
const headers = {
  'User-Agent':
    'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:70.0) Gecko/20100101 Firefox/70.0',
}

const base64Encode = (data: string | object) => {
  let Bf: Buffer
  if (typeof data === 'string') Bf = Buffer.from(data)
  else Bf = Buffer.from(JSON.stringify(data))
  return Bf.toString('base64')
}

const getCookie = (id: string, pw: string) =>
  new Promise<string[]>((res, rej) => {
    request.post(
      `${BaseURL}/frame/sysUser.do?next=`,
      {
        rejectUnauthorized,
        form: { tmpu: base64Encode(id), tmpw: base64Encode(pw) },
        headers,
      },
      (err, { headers }, body: string) => {
        res(headers['set-cookie'])
      }
    )
  })

const main = async () => {
  const cookie = await getCookie(student_no.toString(), student_pw)
  request.post(
    `${BaseURL}/hjju/hj/sta_hj_1010q.jejunu`,
    {
      rejectUnauthorized,
      form: { mode: 'doValue', student_no },
      headers: Object.assign(headers, {
        Cookie: `${cookie[0].substring(0, 19)} ${cookie[1]}`,
      }),
    },
    // @ts-ignore: show grade-point-average
    (err, res, body) => console.log(JSON.parse(body).CREDIT_SUBJECT[0].avg_mark)
  )
}

main()