# -*- coding: utf-8 -*-
from __future__ import absolute_import
from collections import defaultdict
import platform
from six.moves import range
is_windows_special_path = False
if platform.system() == "Windows":
try:
__file__
except UnicodeDecodeError:
is_windows_special_path = True
if not is_windows_special_path:
from concurrent.futures import ThreadPoolExecutor
else:
ThreadPoolExecutor = object
from datetime import datetime
import io
import itertools
import logging
import operator
import os
import socket
from babelfish import Language, LanguageReverseError
from guessit import guessit
from six.moves.xmlrpc_client import ProtocolError
from rarfile import BadRarFile, NotRarFile, RarCannotExec, RarFile
from zipfile import BadZipfile
from ssl import SSLError
import requests
from .exceptions import ServiceUnavailable
from .extensions import provider_manager, refiner_manager
from .score import compute_score as default_compute_score
from .subtitle import SUBTITLE_EXTENSIONS, get_subtitle_path
from .utils import hash_napiprojekt, hash_opensubtitles, hash_shooter, hash_thesubdb
from .video import VIDEO_EXTENSIONS, Episode, Movie, Video
#: Supported archive extensions
ARCHIVE_EXTENSIONS = ('.rar',)
logger = logging.getLogger(__name__)
class ProviderPool(object):
"""A pool of providers with the same API as a single :class:`~subliminal.providers.Provider`.
It has a few extra features:
* Lazy loads providers when needed and supports the `with` statement to :meth:`terminate`
the providers on exit.
* Automatically discard providers on failure.
:param list providers: name of providers to use, if not all.
:param dict provider_configs: provider configuration as keyword arguments per provider name to pass when
instanciating the :class:`~subliminal.providers.Provider`.
"""
def __init__(self, providers=None, provider_configs=None):
#: Name of providers to use
self.providers = providers or provider_manager.names()
#: Provider configuration
self.provider_configs = provider_configs or {}
#: Initialized providers
self.initialized_providers = {}
#: Discarded providers
self.discarded_providers = set()
def __enter__(self):
return self
def __exit__(self, exc_type, exc_value, traceback):
self.terminate()
def __getitem__(self, name):
if name not in self.providers:
raise KeyError
if name not in self.initialized_providers:
logger.info('Initializing provider %s', name)
provider = provider_manager[name].plugin(**self.provider_configs.get(name, {}))
provider.initialize()
self.initialized_providers[name] = provider
return self.initialized_providers[name]
def __delitem__(self, name):
if name not in self.initialized_providers:
raise KeyError(name)
try:
logger.info('Terminating provider %s', name)
self.initialized_providers[name].terminate()
except (requests.Timeout, socket.timeout):
logger.error('Provider %r timed out, improperly terminated', name)
except (ServiceUnavailable, ProtocolError): # OpenSubtitles raises xmlrpclib.ProtocolError when unavailable
logger.error('Provider %r unavailable, improperly terminated', name)
except requests.exceptions.HTTPError as e:
if e.response.status_code in range(500, 600):
logger.error('Provider %r unavailable, improperly terminated', name)
else:
logger.exception('Provider %r http error %r, improperly terminated', name, e.response.status_code)
except SSLError as e:
if e.args[0] == 'The read operation timed out':
logger.error('Provider %r unavailable, improperly terminated', name)
else:
logger.exception('Provider %r SSL error %r, improperly terminated', name, e.args[0])
except:
logger.exception('Provider %r terminated unexpectedly', name)
del self.initialized_providers[name]
def __iter__(self):
return iter(self.initialized_providers)
def list_subtitles_provider(self, provider, video, languages):
"""List subtitles with a single provider.
The video and languages are checked against the provider.
:param str provider: name of the provider.
:param video: video to list subtitles for.
:type video: :class:`~subliminal.video.Video`
:param languages: languages to search for.
:type languages: set of :class:`~babelfish.language.Language`
:return: found subtitles.
:rtype: list of :class:`~subliminal.subtitle.Subtitle` or None
"""
# check video validity
if not provider_manager[provider].plugin.check(video):
logger.info('Skipping provider %r: not a valid video', provider)
return []
# check supported languages
provider_languages = provider_manager[provider].plugin.languages & languages
if not provider_languages:
logger.info('Skipping provider %r: no language to search for', provider)
return []
# list subtitles
logger.info('Listing subtitles with provider %r and languages %r', provider, provider_languages)
try:
return self[provider].list_subtitles(video, provider_languages)
except (requests.Timeout, socket.timeout):
logger.error('Provider %r timed out', provider)
except (ServiceUnavailable, ProtocolError): # OpenSubtitles raises xmlrpclib.ProtocolError when unavailable
logger.error('Provider %r unavailable', provider)
except requests.exceptions.HTTPError as e:
if e.response.status_code in range(500, 600):
logger.error('Provider %r unavailable', provider)
else:
logger.exception('Provider %r http error %r', provider, e.response.status_code)
except SSLError as e:
if e.args[0] == 'The read operation timed out':
logger.error('Provider %r unavailable', provider)
else:
logger.exception('Provider %r SSL error %r', provider, e.args[0])
except:
logger.exception('Unexpected error in provider %r', provider)
def list_subtitles(self, video, languages):
"""List subtitles.
:param video: video to list subtitles for.
:type video: :class:`~subliminal.video.Video`
:param languages: languages to search for.
:type languages: set of :class:`~babelfish.language.Language`
:return: found subtitles.
:rtype: list of :class:`~subliminal.subtitle.Subtitle`
"""
subtitles = []
for name in self.providers:
# check discarded providers
if name in self.discarded_providers:
logger.debug('Skipping discarded provider %r', name)
continue
# list subtitles
provider_subtitles = self.list_subtitles_provider(name, video, languages)
if provider_subtitles is None:
logger.info('Discarding provider %s', name)
self.discarded_providers.add(name)
continue
# add the subtitles
subtitles.extend(provider_subtitles)
return subtitles
def download_subtitle(self, subtitle):
"""Download `subtitle`'s :attr:`~subliminal.subtitle.Subtitle.content`.
:param subtitle: subtitle to download.
:type subtitle: :class:`~subliminal.subtitle.Subtitle`
:return: `True` if the subtitle has been successfully downloaded, `False` otherwise.
:rtype: bool
"""
# check discarded providers
if subtitle.provider_name in self.discarded_providers:
logger.warning('Provider %r is discarded', subtitle.provider_name)
return False
logger.info('Downloading subtitle %r', subtitle)
try:
self[subtitle.provider_name].download_subtitle(subtitle)
except (requests.Timeout, socket.timeout):
logger.error('Provider %r timed out, discarding it', subtitle.provider_name)
self.discarded_providers.add(subtitle.provider_name)
return False
except (ServiceUnavailable, ProtocolError): # OpenSubtitles raises xmlrpclib.ProtocolError when unavailable
logger.error('Provider %r unavailable, discarding it', subtitle.provider_name)
self.discarded_providers.add(subtitle.provider_name)
return False
except requests.exceptions.HTTPError as e:
if e.response.status_code in range(500, 600):
logger.error('Provider %r unavailable, discarding it', subtitle.provider_name)
else:
logger.exception('Provider %r http error %r, discarding it', subtitle.provider_name,
e.response.status_code)
self.discarded_providers.add(subtitle.provider_name)
return False
except SSLError as e:
if e.args[0] == 'The read operation timed out':
logger.error('Provider %r unavailable, discarding it', subtitle.provider_name)
else:
logger.exception('Provider %r SSL error %r, discarding it', subtitle.provider_name, e.args[0])
self.discarded_providers.add(subtitle.provider_name)
return False
except (BadRarFile, BadZipfile):
logger.error('Bad archive for %r', subtitle)
return False
except:
logger.exception('Unexpected error in provider %r, discarding it', subtitle.provider_name)
self.discarded_providers.add(subtitle.provider_name)
return False
# check subtitle validity
if not subtitle.is_valid():
logger.error('Invalid subtitle')
return False
return True
def download_best_subtitles(self, subtitles, video, languages, min_score=0, hearing_impaired=False, only_one=False,
compute_score=None):
"""Download the best matching subtitles.
:param subtitles: the subtitles to use.
:type subtitles: list of :class:`~subliminal.subtitle.Subtitle`
:param video: video to download subtitles for.
:type video: :class:`~subliminal.video.Video`
:param languages: languages to download.
:type languages: set of :class:`~babelfish.language.Language`
:param int min_score: minimum score for a subtitle to be downloaded.
:param bool hearing_impaired: hearing impaired preference.
:param bool only_one: download only one subtitle, not one per language.
:param compute_score: function that takes `subtitle` and `video` as positional arguments,
`hearing_impaired` as keyword argument and returns the score.
:return: downloaded subtitles.
:rtype: list of :class:`~subliminal.subtitle.Subtitle`
"""
compute_score = compute_score or default_compute_score
# sort subtitles by score
scored_subtitles = sorted([(s, compute_score(s, video, hearing_impaired=hearing_impaired))
for s in subtitles], key=operator.itemgetter(1), reverse=True)
# download best subtitles, falling back on the next on error
downloaded_subtitles = []
for subtitle, score in scored_subtitles:
# check score
if score < min_score:
logger.info('Score %d is below min_score (%d)', score, min_score)
break
# check downloaded languages
if subtitle.language in set(s.language for s in downloaded_subtitles):
logger.debug('Skipping subtitle: %r already downloaded', subtitle.language)
continue
# download
if self.download_subtitle(subtitle):
downloaded_subtitles.append(subtitle)
# stop when all languages are downloaded
if set(s.language for s in downloaded_subtitles) == languages:
logger.debug('All languages downloaded')
break
# stop if only one subtitle is requested
if only_one:
logger.debug('Only one subtitle downloaded')
break
return downloaded_subtitles
def terminate(self):
"""Terminate all the :attr:`initialized_providers`."""
logger.debug('Terminating initialized providers')
for name in list(self.initialized_providers):
del self[name]
class AsyncProviderPool(ProviderPool):
"""Subclass of :class:`ProviderPool` with asynchronous support for :meth:`~ProviderPool.list_subtitles`.
:param int max_workers: maximum number of threads to use. If `None`, :attr:`max_workers` will be set
to the number of :attr:`~ProviderPool.providers`.
"""
def __init__(self, max_workers=None, *args, **kwargs):
super(AsyncProviderPool, self).__init__(*args, **kwargs)
#: Maximum number of threads to use
self.max_workers = max_workers or len(self.providers)
def list_subtitles_provider(self, provider, video, languages):
return provider, super(AsyncProviderPool, self).list_subtitles_provider(provider, video, languages)
def list_subtitles(self, video, languages):
subtitles = []
with ThreadPoolExecutor(self.max_workers) as executor:
for provider, provider_subtitles in executor.map(self.list_subtitles_provider, self.providers,
itertools.repeat(video, len(self.providers)),
itertools.repeat(languages, len(self.providers))):
# discard provider that failed
if provider_subtitles is None:
logger.info('Discarding provider %s', provider)
self.discarded_providers.add(provider)
continue
# add subtitles
subtitles.extend(provider_subtitles)
return subtitles
def check_video(video, languages=None, age=None, undefined=False):
"""Perform some checks on the `video`.
All the checks are optional. Return `False` if any of this check fails:
* `languages` already exist in `video`'s :attr:`~subliminal.video.Video.subtitle_languages`.
* `video` is older than `age`.
* `video` has an `undefined` language in :attr:`~subliminal.video.Video.subtitle_languages`.
:param video: video to check.
:type video: :class:`~subliminal.video.Video`
:param languages: desired languages.
:type languages: set of :class:`~babelfish.language.Language`
:param datetime.timedelta age: maximum age of the video.
:param bool undefined: fail on existing undefined language.
:return: `True` if the video passes the checks, `False` otherwise.
:rtype: bool
"""
# language test
if languages and not (languages - video.subtitle_languages):
logger.debug('All languages %r exist', languages)
return False
# age test
if age and video.age > age:
logger.debug('Video is older than %r', age)
return False
# undefined test
if undefined and Language('und') in video.subtitle_languages:
logger.debug('Undefined language found')
return False
return True
def search_external_subtitles(path, directory=None):
"""Search for external subtitles from a video `path` and their associated language.
Unless `directory` is provided, search will be made in the same directory as the video file.
:param str path: path to the video.
:param str directory: directory to search for subtitles.
:return: found subtitles with their languages.
:rtype: dict
"""
# split path
dirpath, filename = os.path.split(path)
dirpath = dirpath or '.'
fileroot, fileext = os.path.splitext(filename)
# search for subtitles
subtitles = {}
for p in os.listdir(directory or dirpath):
# keep only valid subtitle filenames
if not p.startswith(fileroot) or not p.endswith(SUBTITLE_EXTENSIONS):
continue
# extract the potential language code
language = Language('und')
language_code = p[len(fileroot):-len(os.path.splitext(p)[1])].replace(fileext, '').replace('_', '-')[1:]
if language_code:
try:
language = Language.fromietf(language_code)
except (ValueError, LanguageReverseError):
logger.error('Cannot parse language code %r', language_code)
subtitles[p] = language
logger.debug('Found subtitles %r', subtitles)
return subtitles
def scan_video(path):
"""Scan a video from a `path`.
:param str path: existing path to the video.
:return: the scanned video.
:rtype: :class:`~subliminal.video.Video`
"""
# check for non-existing path
if not os.path.exists(path):
raise ValueError('Path does not exist')
# check video extension
if not path.endswith(VIDEO_EXTENSIONS):
raise ValueError('%r is not a valid video extension' % os.path.splitext(path)[1])
dirpath, filename = os.path.split(path)
logger.info('Scanning video %r in %r', filename, dirpath)
# guess
video = Video.fromguess(path, guessit(path))
# size and hashes
video.size = os.path.getsize(path)
if video.size > 10485760:
logger.debug('Size is %d', video.size)
video.hashes['opensubtitles'] = hash_opensubtitles(path)
video.hashes['shooter'] = hash_shooter(path)
video.hashes['thesubdb'] = hash_thesubdb(path)
video.hashes['napiprojekt'] = hash_napiprojekt(path)
logger.debug('Computed hashes %r', video.hashes)
else:
logger.warning('Size is lower than 10MB: hashes not computed')
return video
def scan_archive(path):
"""Scan an archive from a `path`.
:param str path: existing path to the archive.
:return: the scanned video.
:rtype: :class:`~subliminal.video.Video`
"""
# check for non-existing path
if not os.path.exists(path):
raise ValueError('Path does not exist')
# check video extension
if not path.endswith(ARCHIVE_EXTENSIONS):
raise ValueError('%r is not a valid archive extension' % os.path.splitext(path)[1])
dirpath, filename = os.path.split(path)
logger.info('Scanning archive %r in %r', filename, dirpath)
# rar extension
if filename.endswith('.rar'):
rar = RarFile(path)
# filter on video extensions
rar_filenames = [f for f in rar.namelist() if f.endswith(VIDEO_EXTENSIONS)]
# no video found
if not rar_filenames:
raise ValueError('No video in archive')
# more than one video found
if len(rar_filenames) > 1:
raise ValueError('More than one video in archive')
# guess
rar_filename = rar_filenames[0]
rar_filepath = os.path.join(dirpath, rar_filename)
video = Video.fromguess(rar_filepath, guessit(rar_filepath))
# size
video.size = rar.getinfo(rar_filename).file_size
else:
raise ValueError('Unsupported extension %r' % os.path.splitext(path)[1])
return video
def scan_videos(path, age=None, archives=True):
"""Scan `path` for videos and their subtitles.
See :func:`refine` to find additional information for the video.
:param str path: existing directory path to scan.
:param datetime.timedelta age: maximum age of the video or archive.
:param bool archives: scan videos in archives.
:return: the scanned videos.
:rtype: list of :class:`~subliminal.video.Video`
"""
# check for non-existing path
if not os.path.exists(path):
raise ValueError('Path does not exist')
# check for non-directory path
if not os.path.isdir(path):
raise ValueError('Path is not a directory')
# walk the path
videos = []
for dirpath, dirnames, filenames in os.walk(path):
logger.debug('Walking directory %r', dirpath)
# remove badly encoded and hidden dirnames
for dirname in list(dirnames):
if dirname.startswith('.'):
logger.debug('Skipping hidden dirname %r in %r', dirname, dirpath)
dirnames.remove(dirname)
# scan for videos
for filename in filenames:
# filter on videos and archives
if not (filename.endswith(VIDEO_EXTENSIONS) or archives and filename.endswith(ARCHIVE_EXTENSIONS)):
continue
# skip hidden files
if filename.startswith('.'):
logger.debug('Skipping hidden filename %r in %r', filename, dirpath)
continue
# reconstruct the file path
filepath = os.path.join(dirpath, filename)
# skip links
if os.path.islink(filepath):
logger.debug('Skipping link %r in %r', filename, dirpath)
continue
# skip old files
try:
file_age = datetime.utcfromtimestamp(os.path.getmtime(filepath))
except ValueError:
logger.warning('Could not get age of file %r in %r', filename, dirpath)
continue
else:
if age and datetime.utcnow() - file_age > age:
logger.debug('Skipping old file %r in %r', filename, dirpath)
continue
# scan
if filename.endswith(VIDEO_EXTENSIONS): # video
try:
video = scan_video(filepath)
except ValueError: # pragma: no cover
logger.exception('Error scanning video')
continue
elif archives and filename.endswith(ARCHIVE_EXTENSIONS): # archive
try:
video = scan_archive(filepath)
except (NotRarFile, RarCannotExec, ValueError): # pragma: no cover
logger.exception('Error scanning archive')
continue
else: # pragma: no cover
raise ValueError('Unsupported file %r' % filename)
videos.append(video)
return videos
def refine(video, episode_refiners=None, movie_refiners=None, **kwargs):
"""Refine a video using :ref:`refiners`.
.. note::
Exceptions raised in refiners are silently passed and logged.
:param video: the video to refine.
:type video: :class:`~subliminal.video.Video`
:param tuple episode_refiners: refiners to use for episodes.
:param tuple movie_refiners: refiners to use for movies.
:param \*\*kwargs: additional parameters for the :func:`~subliminal.refiners.refine` functions.
"""
refiners = ()
if isinstance(video, Episode):
refiners = episode_refiners or ('metadata', 'tvdb', 'omdb')
elif isinstance(video, Movie):
refiners = movie_refiners or ('metadata', 'omdb')
for refiner in refiners:
logger.info('Refining video with %s', refiner)
try:
refiner_manager[refiner].plugin(video, **kwargs)
except:
logger.error('Failed to refine video %r', video.name)
logger.debug('Refiner exception:', exc_info=True)
def list_subtitles(videos, languages, pool_class=ProviderPool, **kwargs):
"""List subtitles.
The `videos` must pass the `languages` check of :func:`check_video`.
:param videos: videos to list subtitles for.
:type videos: set of :class:`~subliminal.video.Video`
:param languages: languages to search for.
:type languages: set of :class:`~babelfish.language.Language`
:param pool_class: class to use as provider pool.
:type pool_class: :class:`ProviderPool`, :class:`AsyncProviderPool` or similar
:param \*\*kwargs: additional parameters for the provided `pool_class` constructor.
:return: found subtitles per video.
:rtype: dict of :class:`~subliminal.video.Video` to list of :class:`~subliminal.subtitle.Subtitle`
"""
listed_subtitles = defaultdict(list)
# check videos
checked_videos = []
for video in videos:
if not check_video(video, languages=languages):
logger.info('Skipping video %r', video)
continue
checked_videos.append(video)
# return immediately if no video passed the checks
if not checked_videos:
return listed_subtitles
# list subtitles
with pool_class(**kwargs) as pool:
for video in checked_videos:
logger.info('Listing subtitles for %r', video)
subtitles = pool.list_subtitles(video, languages - video.subtitle_languages)
listed_subtitles[video].extend(subtitles)
logger.info('Found %d subtitle(s)', len(subtitles))
return listed_subtitles
def download_subtitles(subtitles, pool_class=ProviderPool, **kwargs):
"""Download :attr:`~subliminal.subtitle.Subtitle.content` of `subtitles`.
:param subtitles: subtitles to download.
:type subtitles: list of :class:`~subliminal.subtitle.Subtitle`
:param pool_class: class to use as provider pool.
:type pool_class: :class:`ProviderPool`, :class:`AsyncProviderPool` or similar
:param \*\*kwargs: additional parameters for the provided `pool_class` constructor.
"""
with pool_class(**kwargs) as pool:
for subtitle in subtitles:
logger.info('Downloading subtitle %r', subtitle)
pool.download_subtitle(subtitle)
def download_best_subtitles(videos, languages, min_score=0, hearing_impaired=False, only_one=False, compute_score=None,
pool_class=ProviderPool, **kwargs):
"""List and download the best matching subtitles.
The `videos` must pass the `languages` and `undefined` (`only_one`) checks of :func:`check_video`.
:param videos: videos to download subtitles for.
:type videos: set of :class:`~subliminal.video.Video`
:param languages: languages to download.
:type languages: set of :class:`~babelfish.language.Language`
:param int min_score: minimum score for a subtitle to be downloaded.
:param bool hearing_impaired: hearing impaired preference.
:param bool only_one: download only one subtitle, not one per language.
:param compute_score: function that takes `subtitle` and `video` as positional arguments,
`hearing_impaired` as keyword argument and returns the score.
:param pool_class: class to use as provider pool.
:type pool_class: :class:`ProviderPool`, :class:`AsyncProviderPool` or similar
:param \*\*kwargs: additional parameters for the provided `pool_class` constructor.
:return: downloaded subtitles per video.
:rtype: dict of :class:`~subliminal.video.Video` to list of :class:`~subliminal.subtitle.Subtitle`
"""
downloaded_subtitles = defaultdict(list)
# check videos
checked_videos = []
for video in videos:
if not check_video(video, languages=languages, undefined=only_one):
logger.info('Skipping video %r', video)
continue
checked_videos.append(video)
# return immediately if no video passed the checks
if not checked_videos:
return downloaded_subtitles
# download best subtitles
with pool_class(**kwargs) as pool:
for video in checked_videos:
logger.info('Downloading best subtitles for %r', video)
subtitles = pool.download_best_subtitles(pool.list_subtitles(video, languages - video.subtitle_languages),
video, languages, min_score=min_score,
hearing_impaired=hearing_impaired, only_one=only_one,
compute_score=compute_score)
logger.info('Downloaded %d subtitle(s)', len(subtitles))
downloaded_subtitles[video].extend(subtitles)
return downloaded_subtitles
def save_subtitles(video, subtitles, single=False, directory=None, encoding=None):
"""Save subtitles on filesystem.
Subtitles are saved in the order of the list. If a subtitle with a language has already been saved, other subtitles
with the same language are silently ignored.
The extension used is `.lang.srt` by default or `.srt` is `single` is `True`, with `lang` being the IETF code for
the :attr:`~subliminal.subtitle.Subtitle.language` of the subtitle.
:param video: video of the subtitles.
:type video: :class:`~subliminal.video.Video`
:param subtitles: subtitles to save.
:type subtitles: list of :class:`~subliminal.subtitle.Subtitle`
:param bool single: save a single subtitle, default is to save one subtitle per language.
:param str directory: path to directory where to save the subtitles, default is next to the video.
:param str encoding: encoding in which to save the subtitles, default is to keep original encoding.
:return: the saved subtitles
:rtype: list of :class:`~subliminal.subtitle.Subtitle`
"""
saved_subtitles = []
for subtitle in subtitles:
# check content
if subtitle.content is None:
logger.error('Skipping subtitle %r: no content', subtitle)
continue
# check language
if subtitle.language in set(s.language for s in saved_subtitles):
logger.debug('Skipping subtitle %r: language already saved', subtitle)
continue
# create subtitle path
subtitle_path = get_subtitle_path(video.name, None if single else subtitle.language)
if directory is not None:
subtitle_path = os.path.join(directory, os.path.split(subtitle_path)[1])
# save content as is or in the specified encoding
logger.info('Saving %r to %r', subtitle, subtitle_path)
if encoding is None:
with io.open(subtitle_path, 'wb') as f:
f.write(subtitle.content)
else:
with io.open(subtitle_path, 'w', encoding=encoding) as f:
f.write(subtitle.text)
saved_subtitles.append(subtitle)
# check single
if single:
break
return saved_subtitles