Download all the messages, known as history or logs in previous version, from a Discord server using access via token using python 3.7.

history_reader.py

import argparse
import asyncio
import json
import os

import discord

client = discord.Client()

dirHistory = 'history'
dirClean = 'clean'


@client.event
@asyncio.coroutine
def on_ready():
    print(f'Logged in as: {client.user.name}')
    print('------')

    # create directories
    if not os.path.exists(dirHistory):
        os.mkdir(dirHistory)
    if not os.path.exists(dirClean):
        os.mkdir(dirClean)

    if len(CHANNELS) == 0:
        channels = client.get_all_channels()
    else:
        channels = [client.get_channel(c) for c in CHANNELS]

    for channel in channels:
        try:
            print(channel)
            yield from scrape_history(channel)
        except Exception as e:
            print(e)

    try:
        yield from client.close()
    except Exception as e:
        print(e)


@asyncio.coroutine
async def scrape_history(channel):
    print(f'scraping logs for {channel.name}')

    messages = []
    clean = []

    history = await channel.history(limit=None, oldest_first=True).flatten()
    for message in history:
        messages.append({
            'id': message.id,
            'timestamp': str(message.created_at),
            'edited_timestamp': str(message.edited_at),
            'author_id': message.author.id,
            'author_name': message.author.name,
            'content': message.content
        })
        clean.append(f'{message.created_at}\t{message.author.name}\t{message.content}')

    with open(os.path.join(dirHistory, f'channel-{channel.id}_{channel.name}-message-history.txt'), mode='w') as f:
        json.dump(messages, f)

    with open(os.path.join(dirClean, f'channel-{channel.id}_{channel.name}-message-clean.txt'), mode='w') as f:
        json.dump(clean, f)


parser = argparse.ArgumentParser()
parser.add_argument('-s', '--server', type=int, required=True, default='', help='ID of the server')
parser.add_argument('-t', '--token', type=str, required=True, default='', help='Access token to use')
parser.add_argument('-c', '--channels', type=list, nargs='+', default=[],
                    help='List of channels to download. If missing, all channels with read access will be downloaded.')

args = parser.parse_args()

SERVER_ID = args.server
TOKEN = args.token
CHANNELS = args.channels

client.run(TOKEN)