70 lines
2.9 KiB
Python
70 lines
2.9 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import logging
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from pathlib import Path
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import requests
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from redis import StrictRedis
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from dateutil.parser import parse
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import re
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from .libs.helpers import set_running, unset_running, get_socket_path, safe_create_dir
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class ASNDescriptions():
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def __init__(self, storage_directory: Path, loglevel: int=logging.DEBUG):
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self.__init_logger(loglevel)
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self.asn_meta = StrictRedis(unix_socket_path=get_socket_path('storage'), db=2, decode_responses=True)
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self.logger.debug('Starting ASN History')
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self.directory = storage_directory / 'asn_descriptions'
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safe_create_dir(self.directory)
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self.archives = self.directory / 'archive'
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safe_create_dir(self.archives)
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self.url = 'https://www.cidr-report.org/as2.0/autnums.html'
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def __init_logger(self, loglevel):
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self.logger = logging.getLogger(f'{self.__class__.__name__}')
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self.logger.setLevel(loglevel)
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def __update_available(self):
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r = requests.head(self.url)
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current_last_modified = parse(r.headers['Last-Modified'])
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if not self.asn_meta.exists('ans_description_last_update'):
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return True
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last_update = parse(self.asn_meta.get('ans_description_last_update'))
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if last_update < current_last_modified:
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return True
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return False
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def load_descriptions(self):
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if not self.__update_available():
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self.logger.debug('No new file to import.')
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return
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set_running(self.__class__.__name__)
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self.logger.info('Importing new ASN descriptions.')
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r = requests.get(self.url)
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last_modified = parse(r.headers['Last-Modified']).isoformat()
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p = self.asn_meta.pipeline()
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new_asn = 0
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new_description = 0
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for asn, descr in re.findall('as=AS(.*)&.*</a> (.*)\n', r.text):
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existing_descriptions = self.asn_meta.hgetall(f'{asn}|descriptions')
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if not existing_descriptions:
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self.logger.debug(f'New ASN: {asn} - {descr}')
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p.hset(f'{asn}|descriptions', last_modified, descr)
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new_asn += 1
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else:
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last_descr = sorted(existing_descriptions.keys(), reverse=True)[0]
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if descr != existing_descriptions[last_descr]:
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self.logger.debug(f'New description for {asn}: {existing_descriptions[last_descr]} -> {descr}')
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p.hset(f'{asn}|descriptions', last_modified, descr)
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new_description += 1
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p.set('ans_description_last_update', last_modified)
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p.execute()
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self.logger.info(f'Done with import. New ASNs: {new_asn}, new descriptions: {new_description}')
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if new_asn or new_description:
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with open(self.archives / f'{last_modified}.html', 'w') as f:
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f.write(r.text)
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unset_running(self.__class__.__name__)
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