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#!/usr/bin/env python3

import argparse
import json
import logging
import os
import sys
import urllib.request

logging.basicConfig(
    stream=sys.stdout, format='%(asctime)s %(message)s',
    datefmt='%m/%d/%Y %H:%M:%S')
log = logging.getLogger('koya')
log.setLevel(logging.DEBUG)

def get_domains(headers):
    endpoint = "https://desec.io/api/v1/domains/"
    req = urllib.request.Request(endpoint, headers=headers)
    resp = urllib.request.urlopen(req)

    return json.loads(resp.read())

def get_zone(domain):
    endpoint = f"https://desec.io/api/v1/domains/{domain}/zonefile/"
    req = urllib.request.Request(endpoint, headers=headers)
    resp = urllib.request.urlopen(req)

    return resp.read()

if __name__ == "__main__":
    desc = "desec-zones: retrieve and save all zone files from deSEC API"
    parser = argparse.ArgumentParser(description=desc)
    parser.add_argument("--token", dest="token", type=str, action="store",
                        help="deSEC API token",
                        required=True)
    parser.add_argument("--path", dest="path", type=str, action="store",
                        help="path to store zone files", default="./",
                        required=False)

    args = parser.parse_args()

    headers = {"Authorization": f"Token {args.token}"}
    domains = get_domains(headers)
    log.info(f"Discovered {len(domains)} domains...")

    for domain in domains:
        name = domain["name"]
        zone = get_zone(name)
        path = os.path.join(args.path, name + ".zone")
        with open(path, "wb") as zone_file:
            zone_file.write(zone)
        log.info(f"Wrote {name}'s zone file to {path}")