Logs all text messages and metadata in a Discord channel

disco_logger.py

import requests
import json

"""
Visit https://discord.com/, go to the Network tab of your Developer Tools, and
then open a channel. Find the latest request that looks like:

    GET https://discord.com/api/v8/channels/12345678/messages?limit=50

"12345678" is the CHANNEL_ID

Check the Response Headers section for the Authorization field that looks like:

    Authorization: mfa.abcdefghij

"mfa.abcdefghij" is the AUTHORIZATION
"""

CHANNEL_ID = '123456'
AUTHORIZATION = 'abcdef'

def get_messages(before_id=None):
    params = {
        'limit': 100,
    }
    if before_id:
        params['before'] = before_id

    headers = {
        'Authorization': AUTHORIZATION,
        'Accept-Encoding': 'gzip, deflate',
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0',
    }

    r = requests.get(f'https://discord.com/api/v6/channels/{CHANNEL_ID}/messages',
        params=params, headers=headers)
    r.raise_for_status()

    return r.json()

msgs = []

more = True
last_id = None
while more:
    m = get_messages(last_id)
    msgs.extend(m)

    more = len(m) == 100
    last_id = m[-1]['id']
    print(f'{len(msgs)} messages total, last message id={last_id}')

filename = f'msgs-{CHANNEL_ID}.json'
with open(filename, 'w') as f:
    json.dump(msgs, f)
print(f'dumped to {filename}')