Use Netlify as a personal pomf / dropbox

pomflify.py

#!/usr/bin/env python3
"""
Usage:
    pomflify.py inputfile [filename for url]
    pomflify.py '~/Music/Empty streets.flac' "$(pwgen 6 1).flac"

Author: Alexander Pushkov <alexander@notpushk.in>
License: ISC (https://opensource.org/licenses/ISC)
"""

import os
import json
import hashlib
from urllib.parse import quote as urlquote

import requests

def parse_config():
    loc = os.path.expanduser("~/.config/pomflify.json")
    try:
        with open(loc) as f:
            return json.load(f)
    except:
        print(
            "Put this in ~/.config/pomflify.json:\n\n" +
            json.dumps({
                "token": "(your token from Netlify)",
                "site_id": "(domain or API ID of your Netlify site)"
            }, indent=4) +
            "\n"
        )
        raise


def url(cfg, path):
    api_root = cfg.get("api_root", "https://api.netlify.com/api/v1/")
    return f"{api_root}{path.lstrip('/')}?access_token={cfg['token']}"


def iter_file(f):
    while True:
        data = f.read(1024)
        if not data:
            break
        yield data


def hash_file(f):
    sha1 = hashlib.sha1()
    for data in iter_file(f):
        sha1.update(data)
    f.seek(0)
    return sha1.hexdigest()


def main(cfg, file_path, file_name=None):
    if file_name is None:
        file_name = os.path.basename(file_path).replace(" ", "_")
    file_obj = open(file_path, "rb")
    file_hash = hash_file(file_obj)

    r = requests.get(url(cfg, f"sites/{cfg['site_id']}/files"))
    if r.status_code in [404, 500]:
        old_files = {}
    else:
        r.raise_for_status()
        old_files = {f["id"]: f["sha"] for f in r.json()}
    
    if f"/{file_name}" in old_files:
        print(f"{file_name} already exists, aborting")
        raise SystemExit

    r = requests.post(url(cfg, f"sites/{cfg['site_id']}/deploys"), json={
        "files": {
            **old_files,
            f"/{file_name}": file_hash,
        }
    })
    r.raise_for_status()
    deploy = r.json()
    required = deploy["required"]
    
    try:
        required.remove(file_hash)
    except ValueError:
        print("File already on Netlify CDN")
    else:
        r = requests.put(url(cfg, f"deploys/{deploy['id']}/files/{urlquote(file_name)}"), headers={
            "Content-type": "application/octet-stream"
        }, data=file_obj)
        r.raise_for_status()
    
    assert len(required) == 0

    print(f"{deploy['url']}/{urlquote(file_name)}")


if __name__ == '__main__':
    import sys
    main(parse_config(), *sys.argv[1:])

# Bonus points if you add a redirect to this page (or any other if you want to):
$ cat > /tmp/_redirects
/ https://ale.sh/pomf

$ pomflify.py /tmp/_redirects