download-slack-emoji.py

#!/usr/bin/env python3

import os
import sys
import zipfile

import requests


def main(argv):
    if len(argv) != 3:
        print("Usage: python download-emoji.py <token> <target-file>", file=sys.stderr)
        sys.exit(1)

    [_, token, path] = argv
    session = requests.session()
    metadata = session.get(
        "https://slack.com/api/emoji.list?token={}".format(token)
    ).json()
    assert metadata["ok"]
    print("Downloading {} emoji...".format(len(metadata["emoji"])))
    with zipfile.ZipFile(path, "w") as zf:
        for name, url in metadata["emoji"].items():
            if url.startswith("alias:"):
                continue
            print("Downloading :{}:...".format(name))
            data = session.get(url).content
            zf.writestr(name + ".png", data)
    print("Your emoji are ready! " + path)


if __name__ == "__main__":
    main(sys.argv)