mirror of
https://github.com/SickGear/SickGear.git
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259 lines
9.1 KiB
Python
259 lines
9.1 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2011-2012 Antoine Bertin <diaoulael@gmail.com>
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#
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# This file is part of subliminal.
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#
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# subliminal is free software; you can redistribute it and/or modify it under
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# the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# subliminal is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with subliminal. If not, see <http://www.gnu.org/licenses/>.
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from ..cache import Cache
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from ..exceptions import DownloadFailedError, ServiceError
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from ..language import language_set, Language
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from ..subtitles import EXTENSIONS
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import logging
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import os
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import requests
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import threading
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import zipfile
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__all__ = ['ServiceBase', 'ServiceConfig']
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logger = logging.getLogger("subliminal")
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class ServiceBase(object):
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"""Service base class
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:param config: service configuration
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:type config: :class:`ServiceConfig`
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"""
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#: URL to the service server
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server_url = ''
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#: User Agent for any HTTP-based requests
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user_agent = 'subliminal v0.6'
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#: Whether based on an API or not
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api_based = False
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#: Timeout for web requests
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timeout = 5
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#: :class:`~subliminal.language.language_set` of available languages
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languages = language_set()
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#: Map between language objects and language codes used in the service
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language_map = {}
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#: Default attribute of a :class:`~subliminal.language.Language` to get with :meth:`get_code`
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language_code = 'alpha2'
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#: Accepted video classes (:class:`~subliminal.videos.Episode`, :class:`~subliminal.videos.Movie`, :class:`~subliminal.videos.UnknownVideo`)
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videos = []
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#: Whether the video has to exist or not
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require_video = False
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#: List of required features for BeautifulSoup
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required_features = None
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def __init__(self, config=None):
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self.config = config or ServiceConfig()
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self.session = None
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def __enter__(self):
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self.init()
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return self
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def __exit__(self, *args):
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self.terminate()
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def init(self):
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"""Initialize connection"""
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logger.debug(u'Initializing %s' % self.__class__.__name__)
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self.session = requests.session()
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self.session.headers.update({'User-Agent': self.user_agent})
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def init_cache(self):
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"""Initialize cache, make sure it is loaded from disk"""
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if not self.config or not self.config.cache:
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raise ServiceError('Cache directory is required')
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self.config.cache.load(self.__class__.__name__)
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def save_cache(self):
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self.config.cache.save(self.__class__.__name__)
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def clear_cache(self):
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self.config.cache.clear(self.__class__.__name__)
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def cache_for(self, func, args, result):
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return self.config.cache.cache_for(self.__class__.__name__, func, args, result)
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def cached_value(self, func, args):
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return self.config.cache.cached_value(self.__class__.__name__, func, args)
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def terminate(self):
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"""Terminate connection"""
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logger.debug(u'Terminating %s' % self.__class__.__name__)
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def get_code(self, language):
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"""Get the service code for a :class:`~subliminal.language.Language`
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It uses the :data:`language_map` and if there's no match, falls back
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on the :data:`language_code` attribute of the given :class:`~subliminal.language.Language`
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"""
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if language in self.language_map:
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return self.language_map[language]
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if self.language_code is None:
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raise ValueError('%r has no matching code' % language)
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return getattr(language, self.language_code)
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def get_language(self, code):
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"""Get a :class:`~subliminal.language.Language` from a service code
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It uses the :data:`language_map` and if there's no match, uses the
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given code as ``language`` parameter for the :class:`~subliminal.language.Language`
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constructor
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.. note::
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A warning is emitted if the generated :class:`~subliminal.language.Language`
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is "Undetermined"
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"""
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if code in self.language_map:
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return self.language_map[code]
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language = Language(code, strict=False)
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if language == Language('Undetermined'):
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logger.warning(u'Code %s could not be identified as a language for %s' % (code, self.__class__.__name__))
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return language
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def query(self, *args):
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"""Make the actual query"""
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raise NotImplementedError()
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def list(self, video, languages):
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"""List subtitles
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As a service writer, you can either override this method or implement
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:meth:`list_checked` instead to have the languages pre-filtered for you
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"""
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if not self.check_validity(video, languages):
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return []
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return self.list_checked(video, languages)
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def list_checked(self, video, languages):
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"""List subtitles without having to check parameters for validity"""
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raise NotImplementedError()
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def download(self, subtitle):
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"""Download a subtitle"""
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self.download_file(subtitle.link, subtitle.path)
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return subtitle
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@classmethod
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def check_validity(cls, video, languages):
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"""Check for video and languages validity in the Service
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:param video: the video to check
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:type video: :class:`~subliminal.videos.video`
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:param languages: languages to check
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:type languages: :class:`~subliminal.language.Language`
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:rtype: bool
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"""
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languages = (languages & cls.languages) - language_set(['Undetermined'])
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if not languages:
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logger.debug(u'No language available for service %s' % cls.__name__.lower())
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return False
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if cls.require_video and not video.exists or not isinstance(video, tuple(cls.videos)):
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logger.debug(u'%r is not valid for service %s' % (video, cls.__name__.lower()))
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return False
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return True
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def download_file(self, url, filepath):
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"""Attempt to download a file and remove it in case of failure
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:param string url: URL to download
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:param string filepath: destination path
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"""
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logger.info(u'Downloading %s in %s' % (url, filepath))
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try:
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r = self.session.get(url, timeout = 10, headers = {'Referer': url, 'User-Agent': self.user_agent})
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with open(filepath, 'wb') as f:
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f.write(r.content)
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except Exception as e:
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logger.error(u'Download failed: %s' % e)
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if os.path.exists(filepath):
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os.remove(filepath)
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raise DownloadFailedError(str(e))
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logger.debug(u'Download finished')
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def download_zip_file(self, url, filepath):
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"""Attempt to download a zip file and extract any subtitle file from it, if any.
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This cleans up after itself if anything fails.
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:param string url: URL of the zip file to download
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:param string filepath: destination path for the subtitle
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"""
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logger.info(u'Downloading %s in %s' % (url, filepath))
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try:
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zippath = filepath + '.zip'
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r = self.session.get(url, timeout = 10, headers = {'Referer': url, 'User-Agent': self.user_agent})
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with open(zippath, 'wb') as f:
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f.write(r.content)
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if not zipfile.is_zipfile(zippath):
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# TODO: could check if maybe we already have a text file and
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# download it directly
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raise DownloadFailedError('Downloaded file is not a zip file')
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zipsub = zipfile.ZipFile(zippath)
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for subfile in zipsub.namelist():
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if os.path.splitext(subfile)[1] in EXTENSIONS:
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with open(filepath, 'wb') as f:
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f.write(zipsub.open(subfile).read())
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break
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else:
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zipsub.close()
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raise DownloadFailedError('No subtitles found in zip file')
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zipsub.close()
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os.remove(zippath)
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except Exception as e:
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logger.error(u'Download %s failed: %s' % (url, e))
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if os.path.exists(zippath):
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os.remove(zippath)
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if os.path.exists(filepath):
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os.remove(filepath)
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raise DownloadFailedError(str(e))
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logger.debug(u'Download finished')
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class ServiceConfig(object):
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"""Configuration for any :class:`Service`
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:param bool multi: whether to download one subtitle per language or not
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:param string cache_dir: cache directory
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"""
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def __init__(self, multi=False, cache_dir=None):
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self.multi = multi
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self.cache_dir = cache_dir
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self.cache = None
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if cache_dir is not None:
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self.cache = Cache(cache_dir)
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def __repr__(self):
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return 'ServiceConfig(%r, %s)' % (self.multi, self.cache.cache_dir)
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