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Diffstat (limited to 'pyload/plugins/addons/Checksum.py')
| -rw-r--r-- | pyload/plugins/addons/Checksum.py | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/pyload/plugins/addons/Checksum.py b/pyload/plugins/addons/Checksum.py new file mode 100644 index 000000000..b290838bb --- /dev/null +++ b/pyload/plugins/addons/Checksum.py @@ -0,0 +1,169 @@ +# -*- coding: utf-8 -*- + +""" + 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 <http://www.gnu.org/licenses/>. + + @author: zoidberg +""" +from __future__ import with_statement +import hashlib, zlib +from os import remove +from os.path import getsize, isfile, splitext +import re + +from module.utils import save_join, fs_encode +from module.plugins.Hook import Hook + +def computeChecksum(local_file, algorithm): + if algorithm in getattr(hashlib, "algorithms", ("md5", "sha1", "sha224", "sha256", "sha384", "sha512")): + h = getattr(hashlib, algorithm)() + chunk_size = 128 * h.block_size + + with open(local_file, 'rb') as f: + for chunk in iter(lambda: f.read(chunk_size), ''): + h.update(chunk) + + return h.hexdigest() + + elif algorithm in ("adler32", "crc32"): + hf = getattr(zlib, algorithm) + last = 0 + + with open(local_file, 'rb') as f: + for chunk in iter(lambda: f.read(8192), ''): + last = hf(chunk, last) + + return "%x" % last + + else: + return None + +class Checksum(Hook): + __name__ = "Checksum" + __version__ = "0.07" + __description__ = "Verify downloaded file size and checksum (enable in general preferences)" + __config__ = [("activated", "bool", "Activated", True), + ("action", "fail;retry;nothing", "What to do if check fails?", "retry"), + ("max_tries", "int", "Number of retries", 2)] + __author_name__ = ("zoidberg") + __author_mail__ = ("zoidberg@mujmail.cz") + + methods = { 'sfv':'crc32', 'crc': 'crc32', 'hash': 'md5'} + regexps = { 'sfv': r'^(?P<name>[^;].+)\s+(?P<hash>[0-9A-Fa-f]{8})$', + 'md5': r'^(?P<name>[0-9A-Fa-f]{32}) (?P<file>.+)$', + 'crc': r'filename=(?P<name>.+)\nsize=(?P<size>\d+)\ncrc32=(?P<hash>[0-9A-Fa-f]{8})$', + 'default': r'^(?P<hash>[0-9A-Fa-f]+)\s+\*?(?P<name>.+)$' } + + def setup(self): + if not self.config['general']['checksum']: + self.logInfo("Checksum validation is disabled in general configuration") + + self.algorithms = sorted(getattr(hashlib, "algorithms", ("md5", "sha1", "sha224", "sha256", "sha384", "sha512")), reverse = True) + self.algorithms.extend(["crc32", "adler32"]) + self.formats = self.algorithms + ['sfv', 'crc', 'hash'] + + def downloadFinished(self, pyfile): + """ + Compute checksum for the downloaded file and compare it with the hash provided by the hoster. + pyfile.plugin.check_data should be a dictionary which can contain: + a) if known, the exact filesize in bytes (e.g. "size": 123456789) + b) hexadecimal hash string with algorithm name as key (e.g. "md5": "d76505d0869f9f928a17d42d66326307") + """ + if hasattr(pyfile.plugin, "check_data") and (isinstance(pyfile.plugin.check_data, dict)): + data = pyfile.plugin.check_data.copy() + elif hasattr(pyfile.plugin, "api_data") and (isinstance(pyfile.plugin.api_data, dict)): + data = pyfile.plugin.api_data.copy() + else: + return + + self.logDebug(data) + + if not pyfile.plugin.lastDownload: + self.checkFailed(pyfile, None, "No file downloaded") + + local_file = fs_encode(pyfile.plugin.lastDownload) + #download_folder = self.config['general']['download_folder'] + #local_file = fs_encode(save_join(download_folder, pyfile.package().folder, pyfile.name)) + + if not isfile(local_file): + self.checkFailed(pyfile, None, "File does not exist") + + # validate file size + if "size" in data: + api_size = int(data['size']) + file_size = getsize(local_file) + if api_size != file_size: + self.logWarning("File %s has incorrect size: %d B (%d expected)" % (pyfile.name, file_size, api_size)) + self.checkFailed(pyfile, local_file, "Incorrect file size") + del data['size'] + + # validate checksum + if data and self.config['general']['checksum']: + if "checksum" in data: + data['md5'] = data['checksum'] + + for key in self.algorithms: + if key in data: + checksum = computeChecksum(local_file, key.replace("-","").lower()) + if checksum: + if checksum == data[key]: + self.logInfo('File integrity of "%s" verified by %s checksum (%s).' % (pyfile.name, key.upper(), checksum)) + return + else: + self.logWarning("%s checksum for file %s does not match (%s != %s)" % (key.upper(), pyfile.name, checksum, data[key])) + self.checkFailed(pyfile, local_file, "Checksums do not match") + else: + self.logWarning("Unsupported hashing algorithm: %s" % key.upper()) + else: + self.logWarning("Unable to validate checksum for file %s" % (pyfile.name)) + + def checkFailed(self, pyfile, local_file, msg): + action = self.getConfig("action") + if action == "fail": + pyfile.plugin.fail(reason = msg) + elif action == "retry": + if local_file: + remove(local_file) + pyfile.plugin.retry(reason = msg, max_tries = self.getConfig("max_tries")) + + + def packageFinished(self, pypack): + download_folder = save_join(self.config['general']['download_folder'], pypack.folder, "") + + for link in pypack.getChildren().itervalues(): + file_type = splitext(link["name"])[1][1:].lower() + #self.logDebug(link, file_type) + + if file_type not in self.formats: + continue + + hash_file = fs_encode(save_join(download_folder, link["name"])) + if not isfile(hash_file): + self.logWarning("File not found: %s" % link["name"]) + continue + + with open(hash_file) as f: + text = f.read() + + for m in re.finditer(self.regexps.get(file_type, self.regexps['default']), text): + data = m.groupdict() + self.logDebug(link["name"], data) + + local_file = fs_encode(save_join(download_folder, data["name"])) + algorithm = self.methods.get(file_type, file_type) + checksum = computeChecksum(local_file, algorithm) + if checksum == data["hash"]: + self.logInfo('File integrity of "%s" verified by %s checksum (%s).' % (data["name"], algorithm, checksum)) + else: + self.logWarning("%s checksum for file %s does not match (%s != %s)" % (algorithm, data["name"], checksum, data["hash"]))
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