import datetime import ipaddress import json import logging from inspect import currentframe, getframeinfo, getmodulename, stack from os import mkdir, path from typing import List, Union import requests import dns.exception import dns.resolver from dateutil.parser import parse as parsedate def init_logging(): rel_path = getframeinfo(currentframe()).filename current_folder = path.dirname(path.abspath(rel_path)) LOG_DIR = path.join(current_folder, '../generators.log') logFormatter = logging.Formatter( "[%(asctime)s] %(levelname)s::%(funcName)s()::%(message)s") rootLogger = logging.getLogger() rootLogger.setLevel(logging.INFO) # Log to file fileHandler = logging.FileHandler(LOG_DIR) fileHandler.setFormatter(logFormatter) rootLogger.addHandler(fileHandler) # Log to console too ''' consoleHandler = logging.StreamHandler() consoleHandler.setFormatter(logFormatter) rootLogger.addHandler(consoleHandler) ''' return rootLogger init_logging() def download_to_file(url, file): frame_records = stack()[1] caller = getmodulename(frame_records[1]).upper() user_agent = { "User-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0"} try: logging.info(f'download_to_file - fetching url: {url}') r = requests.head(url, headers=user_agent) url_datetime = parsedate(r.headers['Last-Modified']).astimezone() file_datetime = datetime.datetime.fromtimestamp( path.getmtime(get_abspath_source_file(file))).astimezone() if(url_datetime > file_datetime): logging.info('{} File on server is newer, so downloading update to {}'.format( caller, get_abspath_source_file(file))) actual_download_to_file(url, file, user_agent) else: logging.info( '{} File on server is older, nothing to do'.format(caller)) except KeyError as exc: logging.warning('{} KeyError in the headers. the {} header was not sent by server {}. Downloading file'.format( caller, str(exc), url)) actual_download_to_file(url, file, user_agent) except FileNotFoundError as exc: logging.info( "{} File didn't exist, so downloading {} from {}".format(caller, file, url)) actual_download_to_file(url, file, user_agent) except Exception as exc: logging.warning( '{} General exception occured: {}.'.format(caller, str(exc))) actual_download_to_file(url, file, user_agent) def actual_download_to_file(url, file, user_agent): r = requests.get(url, headers=user_agent) with open(get_abspath_source_file(file), 'wb') as fd: for chunk in r.iter_content(4096): fd.write(chunk) def process_stream(url): r = requests.get(url, stream=True) data_list = [] for line in r.iter_lines(): v = line.decode('utf-8') if not v.startswith("#"): if v: data_list.append(v) return data_list def download(url): user_agent = { "User-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0"} return requests.get(url, headers=user_agent) def get_abspath_list_file(dst): rel_path = getframeinfo(currentframe()).filename current_folder = path.dirname(path.abspath(rel_path)) real_path = path.join( current_folder, '../lists/{dst}/list.json'.format(dst=dst)) return path.abspath(path.realpath(real_path)) def get_abspath_source_file(dst): rel_path = getframeinfo(currentframe()).filename current_folder = path.dirname(path.abspath(rel_path)) tmp_path = path.join(current_folder, '../tmp/') if not path.exists(tmp_path): mkdir(tmp_path) return path.abspath(path.realpath(path.join(tmp_path, '{dst}'.format(dst=dst)))) def get_version(): return int(datetime.date.today().strftime('%Y%m%d')) def unique_sorted_warninglist(warninglist): warninglist['list'] = sorted(set(warninglist['list'])) return warninglist def write_to_file(warninglist, dst): frame_records = stack()[1] caller = getmodulename(frame_records[1]).upper() try: warninglist = unique_sorted_warninglist(warninglist) with open(get_abspath_list_file(dst), 'w') as data_file: json.dump(warninglist, data_file, indent=2, sort_keys=True) data_file.write("\n") logging.info('New warninglist written to {}.'.format( get_abspath_list_file(dst))) except Exception as exc: logging.error( '{} General exception occurred: {}.'.format(caller, str(exc))) def consolidate_networks(networks): # Split to IPv4 and IPv6 ranges ipv4_networks = [] ipv6_networks = [] for network in networks: if isinstance(network, str): # Convert string to IpNetwork network = ipaddress.ip_network(network) if network.version == 4: ipv4_networks.append(network) else: ipv6_networks.append(network) # Collapse ranges networks_to_keep = list(map(str, ipaddress.collapse_addresses(ipv4_networks))) networks_to_keep.extend(map(str, ipaddress.collapse_addresses(ipv6_networks))) return networks_to_keep def create_resolver() -> dns.resolver.Resolver: resolver = dns.resolver.Resolver(configure=False) resolver.timeout = 30 resolver.lifetime = 30 resolver.cache = dns.resolver.LRUCache() resolver.nameservers = ["193.17.47.1", "185.43.135.1"] # CZ.NIC nameservers return resolver class Dns: def __init__(self, resolver: dns.resolver.Resolver): self.__resolver = resolver def _parse_spf(self, domain: str, spf: str) -> dict: output = {"include": [], "ranges": [], "a": [], "mx": []} for part in spf.split(" "): if part.startswith("include:"): output["include"].append(part.split(":", 1)[1]) elif part.startswith("redirect="): output["include"].append(part.split("=", 1)[1]) elif part == "a": output["a"].append(domain) elif part.startswith("a:"): output["a"].append(part.split(":", 1)[1]) elif part == "mx": output["mx"].append(domain) elif part.startswith("mx:"): output["mx"].append(part.split(":", 1)[1]) elif part.startswith("ip4:") or part.startswith("ip6:"): output["ranges"].append(ipaddress.ip_network(part.split(":", 1)[1], strict=False)) return output def get_ip_for_domain(self, domain: str) -> List[Union[ipaddress.IPv4Address, ipaddress.IPv6Address]]: ranges = [] try: for ip in self.__resolver.query(domain, "a"): ranges.append(ipaddress.IPv4Address(str(ip))) except (dns.resolver.NoAnswer, dns.resolver.NXDOMAIN, dns.exception.Timeout, dns.resolver.NoNameservers): pass try: for ip in self.__resolver.query(domain, "aaaa"): ranges.append(ipaddress.IPv6Address(str(ip))) except (dns.resolver.NoAnswer, dns.resolver.NXDOMAIN, dns.exception.Timeout, dns.resolver.NoNameservers): pass return ranges def get_mx_ips_for_domain(self, domain: str) -> List[Union[ipaddress.IPv4Address, ipaddress.IPv6Address]]: ranges = [] try: for rdata in self.__resolver.query(domain, "mx"): ranges += self.get_ip_for_domain(rdata.exchange) except (dns.resolver.NoAnswer, dns.resolver.NXDOMAIN, dns.exception.Timeout, dns.resolver.NoNameservers): pass return ranges def get_ip_ranges_from_spf(self, domain: str) -> List[Union[ipaddress.IPv4Network, ipaddress.IPv6Network]]: try: txt_records = self.__resolver.query(domain, "TXT") except (dns.resolver.NoAnswer, dns.resolver.NXDOMAIN, dns.exception.Timeout, dns.resolver.NoNameservers) as e: logging.info("Could not fetch TXT record for domain {}: {}".format(domain, str(e))) return [] ranges = [] for rdata in txt_records: record = "".join([s.decode("utf-8") for s in rdata.strings]) if not record.startswith("v=spf1"): continue parsed = self._parse_spf(domain, record) ranges += parsed["ranges"] for include in parsed["include"]: ranges += self.get_ip_ranges_from_spf(include) for domain in parsed["a"]: ranges += map(ipaddress.ip_network, self.get_ip_for_domain(domain)) for mx in parsed["mx"]: ranges += map(ipaddress.ip_network, self.get_mx_ips_for_domain(mx)) return ranges def main(): init_logging() if __name__ == '__main__': main()