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#!/usr/bin/python3
# encoding=utf-8
#
# Copyright © 2014-2017 Simon McVittie <smcv@debian.org>
# Copyright © 2015-2016 Alexandre Detiste <alexandre@detiste.be>
# SPDX-License-Identifier: GPL-2.0-or-later
import logging
import os
import random
import urllib.request
from .data import (HashedFile)
from .paths import (ETCDIR)
from .util import (AGENT, mkdir_p)
logging.basicConfig()
logger = logging.getLogger(__name__)
class NotDownloadable(Exception):
pass
class OutOfSpace(Exception):
pass
class Downloader:
def __init__(self, progress_factory=None):
self.download_failed = set()
if progress_factory is None:
self.progress_factory = lambda info=None: None
else:
self.progress_factory = progress_factory
@staticmethod
def choose_mirror(wanted):
mirrors = []
mirror = os.environ.get('GDP_MIRROR')
if mirror:
if mirror.startswith('/'):
mirror = 'file://' + mirror
elif mirror.split(':')[0] not in ('http', 'https', 'ftp', 'file'):
mirror = 'http://' + mirror
if not mirror.endswith('/'):
mirror = mirror + '/'
if type(wanted.download) is str:
if not mirror:
return [wanted.download]
url_basename = os.path.basename(wanted.download)
if '?' not in url_basename:
mirrors.append(mirror + url_basename)
wanted.name = wanted.name.replace(' ','%20')
if wanted.name != url_basename and '?' not in wanted.name:
mirrors.append(mirror + wanted.name)
mirrors.append(wanted.download)
return mirrors
for mirror_list, details in wanted.download.items():
try:
f = open(os.path.join(ETCDIR, mirror_list), encoding='utf-8')
for line in f:
url = line.strip()
if not url:
continue
if url.startswith('#'):
continue
if details.get('path', '.') != '.':
if not url.endswith('/'):
url = url + '/'
url = url + details['path']
if not url.endswith('/'):
url = url + '/'
url = url + details.get('name', wanted.filename)
mirrors.append(url)
except:
logger.warning('Could not open mirror list "%s"', mirror_list,
exc_info=True)
random.shuffle(mirrors)
if mirror:
if mirrors and '?' not in mirrors[0]:
mirrors.insert(0, mirror + os.path.basename(mirrors[0]))
elif '?' not in wanted.name:
mirrors.insert(0, mirror + wanted.name)
if not mirrors:
logger.error('Could not select a mirror for "%s"', wanted.name)
return []
return mirrors
def download(self, wanted, dest):
logger.debug('trying to download %s...', wanted.name)
statvfs = os.statvfs(dest)
if wanted.size > statvfs.f_frsize * statvfs.f_bavail:
logger.error("Out of space on %s, can't download %s.",
dest, wanted.name)
self.download_failed |= set(self.choose_mirror(wanted))
raise OutOfSpace
urls = self.choose_mirror(wanted)
for url in urls:
if url in self.download_failed:
logger.debug('... no, it already failed')
continue
logger.debug('... %s', url)
tmp = None
try:
rf = urllib.request.urlopen(urllib.request.Request(
url,headers={'User-Agent': AGENT}))
if rf is None:
continue
try:
size = int(rf.info().get('Content-Length'))
except:
size = None
if size and size != wanted.size:
logger.warning("File doesn't have expected size"
" (%s vs %s), skipping %s",
size, wanted.size, url)
self.download_failed.add(url)
continue
tmp = os.path.join(dest, wanted.name)
mkdir_p(os.path.dirname(tmp))
wf = open(tmp, 'wb')
logger.info('downloading %s', url)
hf = HashedFile.from_file(url, rf, wf,
size=wanted.size,
progress=self.progress_factory())
wf.close()
return tmp, hf
except Exception as e:
logger.warning('Failed to download "%s": %s', url,
e)
self.download_failed.add(url)
if tmp is not None:
os.remove(tmp)
else:
raise NotDownloadable
if __name__ == '__main__':
# Usage:
# GDP_UNINSTALLED=1 \
# PYTHONPATH=$(pwd) \
# python3 -m game_data_packager.download \
# unreal skaarj_logo.jpg .
import sys
from .game import (load_games)
game = sys.argv[1]
filename = sys.argv[2]
dest = sys.argv[3]
games = load_games(game=game)
game = games[game]
game.load_file_data()
wanted = game.files[filename]
path, hasher = Downloader().download(wanted, dest)
if path is None:
logger.error('Unable to download "%s"', filename)
else:
logger.info('Downloaded "%s" to "%s"', filename, path)
if hasher.size != wanted.size:
logger.info('size: %s, expected %s', hasher.size, wanted.size)
if hasher.md5 != wanted.md5:
logger.info('md5: %s, expected %s', hasher.md5, wanted.md5)
if hasher.sha1 != wanted.sha1:
logger.info('sha1: %s, expected %s', hasher.sha1, wanted.sha1)
if hasher.sha256 != wanted.sha256:
logger.info(
'sha256: %s, expected %s', hasher.sha256, wanted.sha256)
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