211 lines
7.8 KiB
Python
211 lines
7.8 KiB
Python
import functools
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import itertools
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import json
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import os
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import time
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import urllib.error
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from ..utils import (
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PostProcessingError,
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_configuration_args,
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encodeFilename,
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network_exceptions,
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sanitized_Request,
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write_string,
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)
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class PostProcessorMetaClass(type):
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@staticmethod
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def run_wrapper(func):
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@functools.wraps(func)
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def run(self, info, *args, **kwargs):
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info_copy = self._copy_infodict(info)
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self._hook_progress({'status': 'started'}, info_copy)
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ret = func(self, info, *args, **kwargs)
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if ret is not None:
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_, info = ret
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self._hook_progress({'status': 'finished'}, info_copy)
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return ret
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return run
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def __new__(cls, name, bases, attrs):
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if 'run' in attrs:
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attrs['run'] = cls.run_wrapper(attrs['run'])
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return type.__new__(cls, name, bases, attrs)
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class PostProcessor(metaclass=PostProcessorMetaClass):
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"""Post Processor class.
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PostProcessor objects can be added to downloaders with their
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add_post_processor() method. When the downloader has finished a
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successful download, it will take its internal chain of PostProcessors
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and start calling the run() method on each one of them, first with
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an initial argument and then with the returned value of the previous
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PostProcessor.
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The chain will be stopped if one of them ever returns None or the end
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of the chain is reached.
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PostProcessor objects follow a "mutual registration" process similar
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to InfoExtractor objects.
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Optionally PostProcessor can use a list of additional command-line arguments
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with self._configuration_args.
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"""
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_downloader = None
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def __init__(self, downloader=None):
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self._progress_hooks = []
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self.add_progress_hook(self.report_progress)
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self.set_downloader(downloader)
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self.PP_NAME = self.pp_key()
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@classmethod
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def pp_key(cls):
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name = cls.__name__[:-2]
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return name[6:] if name[:6].lower() == 'ffmpeg' else name
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def to_screen(self, text, prefix=True, *args, **kwargs):
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tag = '[%s] ' % self.PP_NAME if prefix else ''
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if self._downloader:
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return self._downloader.to_screen(f'{tag}{text}', *args, **kwargs)
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def report_warning(self, text, *args, **kwargs):
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if self._downloader:
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return self._downloader.report_warning(text, *args, **kwargs)
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def deprecation_warning(self, text):
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if self._downloader:
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return self._downloader.deprecation_warning(text)
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write_string(f'DeprecationWarning: {text}')
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def report_error(self, text, *args, **kwargs):
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self.deprecation_warning('"yt_dlp.postprocessor.PostProcessor.report_error" is deprecated. '
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'raise "yt_dlp.utils.PostProcessingError" instead')
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if self._downloader:
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return self._downloader.report_error(text, *args, **kwargs)
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def write_debug(self, text, *args, **kwargs):
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if self._downloader:
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return self._downloader.write_debug(text, *args, **kwargs)
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def get_param(self, name, default=None, *args, **kwargs):
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if self._downloader:
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return self._downloader.params.get(name, default, *args, **kwargs)
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return default
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def set_downloader(self, downloader):
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"""Sets the downloader for this PP."""
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self._downloader = downloader
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for ph in getattr(downloader, '_postprocessor_hooks', []):
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self.add_progress_hook(ph)
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def _copy_infodict(self, info_dict):
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return getattr(self._downloader, '_copy_infodict', dict)(info_dict)
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@staticmethod
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def _restrict_to(*, video=True, audio=True, images=True, simulated=True):
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allowed = {'video': video, 'audio': audio, 'images': images}
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def decorator(func):
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@functools.wraps(func)
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def wrapper(self, info):
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if not simulated and (self.get_param('simulate') or self.get_param('skip_download')):
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return [], info
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format_type = (
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'video' if info.get('vcodec') != 'none'
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else 'audio' if info.get('acodec') != 'none'
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else 'images')
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if allowed[format_type]:
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return func(self, info)
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else:
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self.to_screen('Skipping %s' % format_type)
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return [], info
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return wrapper
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return decorator
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def run(self, information):
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"""Run the PostProcessor.
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The "information" argument is a dictionary like the ones
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composed by InfoExtractors. The only difference is that this
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one has an extra field called "filepath" that points to the
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downloaded file.
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This method returns a tuple, the first element is a list of the files
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that can be deleted, and the second of which is the updated
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information.
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In addition, this method may raise a PostProcessingError
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exception if post processing fails.
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"""
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return [], information # by default, keep file and do nothing
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def try_utime(self, path, atime, mtime, errnote='Cannot update utime of file'):
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try:
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os.utime(encodeFilename(path), (atime, mtime))
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except Exception:
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self.report_warning(errnote)
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def _configuration_args(self, exe, *args, **kwargs):
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return _configuration_args(
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self.pp_key(), self.get_param('postprocessor_args'), exe, *args, **kwargs)
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def _hook_progress(self, status, info_dict):
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if not self._progress_hooks:
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return
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status.update({
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'info_dict': info_dict,
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'postprocessor': self.pp_key(),
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})
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for ph in self._progress_hooks:
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ph(status)
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def add_progress_hook(self, ph):
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# See YoutubeDl.py (search for postprocessor_hooks) for a description of this interface
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self._progress_hooks.append(ph)
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def report_progress(self, s):
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s['_default_template'] = '%(postprocessor)s %(status)s' % s
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progress_dict = s.copy()
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progress_dict.pop('info_dict')
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progress_dict = {'info': s['info_dict'], 'progress': progress_dict}
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progress_template = self.get_param('progress_template', {})
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tmpl = progress_template.get('postprocess')
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if tmpl:
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self._downloader.to_stdout(self._downloader.evaluate_outtmpl(tmpl, progress_dict))
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self._downloader.to_console_title(self._downloader.evaluate_outtmpl(
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progress_template.get('postprocess-title') or 'yt-dlp %(progress._default_template)s',
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progress_dict))
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def _download_json(self, url, *, expected_http_errors=(404,)):
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# While this is not an extractor, it behaves similar to one and
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# so obey extractor_retries and sleep_interval_requests
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max_retries = self.get_param('extractor_retries', 3)
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sleep_interval = self.get_param('sleep_interval_requests') or 0
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self.write_debug(f'{self.PP_NAME} query: {url}')
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for retries in itertools.count():
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try:
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rsp = self._downloader.urlopen(sanitized_Request(url))
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return json.loads(rsp.read().decode(rsp.info().get_param('charset') or 'utf-8'))
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except network_exceptions as e:
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if isinstance(e, urllib.error.HTTPError) and e.code in expected_http_errors:
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return None
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if retries < max_retries:
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self.report_warning(f'{e}. Retrying...')
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if sleep_interval > 0:
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self.to_screen(f'Sleeping {sleep_interval} seconds ...')
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time.sleep(sleep_interval)
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continue
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raise PostProcessingError(f'Unable to communicate with {self.PP_NAME} API: {e}')
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class AudioConversionError(PostProcessingError):
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pass
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