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#!/usr/bin/env python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
# Copyright 2020-2021 Árni Dagur <arni@dagur.eu>
#
# This file is part of qutebrowser.
#
# qutebrowser is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# qutebrowser is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with qutebrowser. If not, see <https://www.gnu.org/licenses/>.
import io
import gzip
import csv
import pathlib
import itertools
import urllib.request
import tempfile
from typing import Optional
URL = "https://raw.githubusercontent.com/brave/adblock-rust/master/data/ublock-matches.tsv"
CACHE_PATH = pathlib.Path(tempfile.gettempdir(), "ublock-matches-cache.tsv")
ROWS_TO_USE = 30_000
def type_rename(type_str: str) -> Optional[str]:
"""Use the same resource type names as QtWebEngine."""
if type_str == "other":
return "unknown"
if type_str == "xmlhttprequest":
return "xhr"
if type_str == "font":
return "font_resource"
if type_str in ["image", "stylesheet", "media", "script", "sub_frame"]:
return type_str
return None
def main():
# Download file or use cached version
if CACHE_PATH.is_file():
print(f"Using cached file {CACHE_PATH}")
data = io.StringIO(CACHE_PATH.read_text(encoding="utf-8"))
else:
request = urllib.request.Request(URL)
print(f"Downloading {URL} ...")
response = urllib.request.urlopen(request)
assert response.status == 200
data_str = response.read().decode("utf-8")
print(f"Saving to cache file {CACHE_PATH} ...")
CACHE_PATH.write_text(data_str, encoding="utf-8")
data = io.StringIO(data_str)
# We only want the first three columns and the first ROWS_TO_USE rows
print("Reading rows into memory...")
reader = csv.DictReader(data, delimiter="\t")
rows = list(itertools.islice(reader, ROWS_TO_USE))
print("Writing filtered file to memory...")
uncompressed_f = io.StringIO()
writer = csv.DictWriter(
uncompressed_f, ["url", "source_url", "type"], delimiter="\t"
)
writer.writeheader()
for row in rows:
type_renamed = type_rename(row["type"])
if type_renamed is None:
# Ignore request types we don't recognize
continue
writer.writerow(
{
"url": row["url"],
"source_url": row["sourceUrl"],
"type": type_renamed,
}
)
uncompressed_f.seek(0)
print("Compressing filtered file and saving to disk...")
# Compress the data before storing on the filesystem
with gzip.open("ublock-matches.tsv.gz", "wb", compresslevel=9) as gzip_f:
gzip_f.write(uncompressed_f.read().encode("utf-8"))
if __name__ == "__main__":
main()
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