mirror of
https://github.com/mikf/gallery-dl.git
synced 2024-11-23 03:02:50 +01:00
99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
# Copyright 2024 Mike Fährmann
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License version 2 as
|
|
# published by the Free Software Foundation.
|
|
|
|
"""Download Archives"""
|
|
|
|
import os
|
|
import sqlite3
|
|
from . import formatter
|
|
|
|
|
|
class DownloadArchive():
|
|
|
|
def __init__(self, path, format_string, pragma=None,
|
|
cache_key="_archive_key"):
|
|
try:
|
|
con = sqlite3.connect(path, timeout=60, check_same_thread=False)
|
|
except sqlite3.OperationalError:
|
|
os.makedirs(os.path.dirname(path))
|
|
con = sqlite3.connect(path, timeout=60, check_same_thread=False)
|
|
con.isolation_level = None
|
|
|
|
self.keygen = formatter.parse(format_string).format_map
|
|
self.connection = con
|
|
self.close = con.close
|
|
self.cursor = cursor = con.cursor()
|
|
self._cache_key = cache_key
|
|
|
|
if pragma:
|
|
for stmt in pragma:
|
|
cursor.execute("PRAGMA " + stmt)
|
|
|
|
try:
|
|
cursor.execute("CREATE TABLE IF NOT EXISTS archive "
|
|
"(entry TEXT PRIMARY KEY) WITHOUT ROWID")
|
|
except sqlite3.OperationalError:
|
|
# fallback for missing WITHOUT ROWID support (#553)
|
|
cursor.execute("CREATE TABLE IF NOT EXISTS archive "
|
|
"(entry TEXT PRIMARY KEY)")
|
|
|
|
def add(self, kwdict):
|
|
"""Add item described by 'kwdict' to archive"""
|
|
key = kwdict.get(self._cache_key) or self.keygen(kwdict)
|
|
self.cursor.execute(
|
|
"INSERT OR IGNORE INTO archive (entry) VALUES (?)", (key,))
|
|
|
|
def check(self, kwdict):
|
|
"""Return True if the item described by 'kwdict' exists in archive"""
|
|
key = kwdict[self._cache_key] = self.keygen(kwdict)
|
|
self.cursor.execute(
|
|
"SELECT 1 FROM archive WHERE entry=? LIMIT 1", (key,))
|
|
return self.cursor.fetchone()
|
|
|
|
def finalize(self):
|
|
pass
|
|
|
|
|
|
class DownloadArchiveMemory(DownloadArchive):
|
|
|
|
def __init__(self, path, format_string, pragma=None,
|
|
cache_key="_archive_key"):
|
|
DownloadArchive.__init__(self, path, format_string, pragma, cache_key)
|
|
self.keys = set()
|
|
|
|
def add(self, kwdict):
|
|
self.keys.add(
|
|
kwdict.get(self._cache_key) or
|
|
self.keygen(kwdict))
|
|
|
|
def check(self, kwdict):
|
|
key = kwdict[self._cache_key] = self.keygen(kwdict)
|
|
if key in self.keys:
|
|
return True
|
|
self.cursor.execute(
|
|
"SELECT 1 FROM archive WHERE entry=? LIMIT 1", (key,))
|
|
return self.cursor.fetchone()
|
|
|
|
def finalize(self):
|
|
if not self.keys:
|
|
return
|
|
|
|
cursor = self.cursor
|
|
with self.connection:
|
|
try:
|
|
cursor.execute("BEGIN")
|
|
except sqlite3.OperationalError:
|
|
pass
|
|
|
|
stmt = "INSERT OR IGNORE INTO archive (entry) VALUES (?)"
|
|
if len(self.keys) < 100:
|
|
for key in self.keys:
|
|
cursor.execute(stmt, (key,))
|
|
else:
|
|
cursor.executemany(stmt, ((key,) for key in self.keys))
|