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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from pathlib import Path
import requests
from appdirs import user_cache_dir
from .bl_process import ProcessBlocklist
from .misc import local_file_present
class Blimp:
def __init__(self, args):
self.outfile = args.outfile
self.dryrun = args.dry_run
self.path = Path(user_cache_dir("blimp"))
self.url = "https://raw.githubusercontent.com/JabberSPAM/blacklist/master/blacklist.txt"
self.blacklist = ""
self.apply_changes = False
self.etag_path = self.path.joinpath(".etag")
self.blacklist_path = self.path.joinpath("blacklist.txt")
def cache_dir_check(self):
if not self.path.is_dir():
Path(self.path).mkdir(parents=True, exist_ok=True)
def download_required(self, etag) -> bool:
"""
method to determine if a new download should be initiated
:param etag: requests etag object
:return: true if download is required
"""
# always trigger download if any local cache file is missing
if not local_file_present(self.blacklist_path):
return True
if not local_file_present(self.etag_path):
return True
# etag file is present but outdated
else:
with open(self.etag_path, "r") as local_file:
local_etag = local_file.read()
if local_etag != etag:
return True
return False
def start_request(self):
"""
determine if the download is required
"""
with requests.Session() as s:
# head request to check etag
head = s.head(self.url)
etag = head.headers["etag"]
if head.status_code != requests.codes.ok:
return
if not self.download_required(etag):
with open(self.blacklist_path, "r", encoding="utf-8") as local_file:
self.blacklist = local_file.read()
else:
r = s.get(self.url)
r.encoding = "utf-8"
local_etag = head.headers["etag"]
self.blacklist = r.content.decode()
with open(self.blacklist_path, "w", encoding="utf-8") as local_file:
local_file.write(self.blacklist)
with open(self.etag_path, "w", encoding="utf-8") as local_file:
local_file.write(local_etag)
def main(self):
# check the cache dir first
self.cache_dir_check()
# only output the selected outfile
if self.dryrun:
print("outfile selected: %s" % self.outfile)
# go
self.start_request()
# blacklist processing
ProcessBlocklist.process(self.blacklist, self.outfile, self.dryrun)
if __name__ == "__main__":
from .cli import cli
cli()
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