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# SPDX-License-Identifier: GPL-3.0-or-later
# Haketilo proxy data and configuration (download of package files).
#
# This file is part of Hydrilla&Haketilo.
#
# Copyright (C) 2022 Wojtek Kosior
#
# This program 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.
#
# This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
#
#
# I, Wojtek Kosior, thereby promise not to sue for violation of this
# file's license. Although I request that you do not make use of this
# code in a proprietary program, I am not going to enforce this in
# court.
"""
....
"""
# Enable using with Python 3.7.
from __future__ import annotations
import sqlite3
import hashlib
from abc import ABC, abstractmethod
from pathlib import Path
from urllib.parse import urljoin
import requests
from ... import state
class FileResolver(ABC):
@abstractmethod
def by_sha256(self, sha256: str) -> bytes:
...
class DummyFileResolver(FileResolver):
def by_sha256(self, sha256: str) -> bytes:
raise NotImplementedError()
def pull_missing_files(
cursor: sqlite3.Cursor,
semirepo_file_resolver: FileResolver = DummyFileResolver()
) -> None:
cursor.execute(
'''
SELECT DISTINCT
f.file_id, f.sha256,
r.repo_id, r.url
FROM
repos AS R
JOIN repo_iterations AS ri USING (repo_id)
JOIN item_versions AS iv USING (repo_iteration_id)
JOIN file_uses AS fu USING (item_version_id)
JOIN files AS f USING (file_id)
WHERE
iv.installed = 'I' AND f.data IS NULL;
'''
)
rows = cursor.fetchall()
for file_id, sha256, repo_id, repo_url in rows:
if repo_id == 1:
file_bytes = semirepo_file_resolver.by_sha256(sha256)
else:
try:
url = urljoin(repo_url, f'file/sha256/{sha256}')
response = requests.get(url)
assert response.ok
file_bytes = response.content
except:
raise state.FileMissingError(
repo_id = str(repo_id),
sha256 = sha256
)
computed_sha256 = hashlib.sha256(file_bytes).digest().hex()
if computed_sha256 != sha256:
raise state.FileIntegrityError(
repo_id = str(repo_id),
sha256 = sha256,
invalid_sha256 = computed_sha256
)
cursor.execute(
'''
UPDATE
files
SET
data = ?
WHERE
file_id = ?;
''',
(file_bytes, file_id)
)
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