board_write.py

import re
import requests
import time
import random
import string
from pyquery import PyQuery as pq

def decode_service_code(_svc : str, _r : str) -> str:
    _r_key = 'yL/M=zNa0bcPQdReSfTgUhViWjXkYIZmnpo+qArOBs1Ct2D3uE4Fv5G6wHl78xJ9K'
    _r = re.sub('[^A-Za-z0-9+/=]', '', _r)

    tmp = ''
    i = 0
    for a in [_r[i * 4:(i + 1) * 4] for i in range((len(_r) + 3) // 4)]:
        t, f, d, h = [_r_key.find(x) for x in a]
        tmp += chr(t << 2 | f >> 4)
        if d != 64:
            tmp += chr((15 & f) << 4 | (d >> 2))
        if h != 64:
            tmp += chr((3 & d) << 6 | h)
    _r = str(int(tmp[0]) + 4) + tmp[1:]
    if int(tmp[0]) > 5:
        _r = str(int(tmp[0]) - 5) + tmp[1:]

    _r = [float(x) for x in _r.split(',')]
    t = ''
    for i in range(len(_r)):
        t += chr(int(2 * (_r[i] - i - 1) / (13 - i - 1)))
    return _svc[0:len(_svc) - 10] + t

def rndStr(len):
    return ''.join(random.choice(string.ascii_letters) for i in range(len))
   
def board_write(gall_id : str, title : str, body : str, proxy : str = '') -> str:
    timeout = 30
    s = requests.Session()
    s.headers.update({ "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.117 Safari/537.36" })
    if proxy:
        s.proxies = { "https":  "https://" + proxy }
    r1 = s.get('https://gall.dcinside.com/board/write/?id=' + gall_id, timeout=timeout)
    time.sleep(2)
    
    _d = pq(r1.text)
    data = dict(_d('#write').serialize_dict())
    data['name'] = 'ㅇㅇ'
    data['password'] = rndStr(8)
    data['subject'] = title
    data['mode'] = 'W'
    data['use_html'] = 'Y'
    s.headers.update({
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
        'Host': 'gall.dcinside.com',
        'Origin': 'https://gall.dcinside.com',
        'Referer': 'https://gall.dcinside.com/board/write/?id=' + gall_id,
        'Sec-Fetch-Mode': 'cors',
        'Sec-Fetch-Site': 'same-origin',
        'X-Requested-With': 'XMLHttpRequest'
    })
    r2 = s.post('https://gall.dcinside.com/block/block/', data=data, timeout=timeout)
    if r2.text == '':
        return 'block key empty'     
    time.sleep(2)
    
    _r = _d('script[type="text/javascript"]').filter(lambda i, e: 'var _r =' in pq(e).text()).text()
    _r = _r[13:_r.find("');")]
    data['service_code'] = decode_service_code(_d('input[name="service_code"]').val(), _r)
    data['block_key'] = r2.text
    data['memo'] = body
    data['code'] = 'undefined'
    data['bgm'] = 0
    #print(json.dumps(data, indent=2, ensure_ascii=False))
    r3 = s.post('https://gall.dcinside.com/board/forms/article_submit', data=data, timeout=timeout)
    #print(data['user_ip'], r3.text)
    return r3.text


#print(board_write('programming', 'test', 'test',)) # '127.0.0.1:8080'))