import functools import json import os from ..networking import Request from ..networking.exceptions import HTTPError, network_exceptions from ..utils import ( PostProcessingError, RetryManager, _configuration_args, deprecation_warning, encodeFilename, ) class PostProcessorMetaClass(type): @staticmethod def run_wrapper(func): @functools.wraps(func) def run(self, info, *args, **kwargs): info_copy = self._copy_infodict(info) self._hook_progress({'status': 'started'}, info_copy) ret = func(self, info, *args, **kwargs) if ret is not None: _, info = ret self._hook_progress({'status': 'finished'}, info_copy) return ret return run def __new__(cls, name, bases, attrs): if 'run' in attrs: attrs['run'] = cls.run_wrapper(attrs['run']) return type.__new__(cls, name, bases, attrs) class PostProcessor(metaclass=PostProcessorMetaClass): """Post Processor class. PostProcessor objects can be added to downloaders with their add_post_processor() method. When the downloader has finished a successful download, it will take its internal chain of PostProcessors and start calling the run() method on each one of them, first with an initial argument and then with the returned value of the previous PostProcessor. PostProcessor objects follow a "mutual registration" process similar to InfoExtractor objects. Optionally PostProcessor can use a list of additional command-line arguments with self._configuration_args. """ _downloader = None def __init__(self, downloader=None): self._progress_hooks = [] self.add_progress_hook(self.report_progress) self.set_downloader(downloader) self.PP_NAME = self.pp_key() @classmethod def pp_key(cls): name = cls.__name__[:-2] return name[6:] if name[:6].lower() == 'ffmpeg' else name def to_screen(self, text, prefix=True, *args, **kwargs): if self._downloader: tag = '[%s] ' % self.PP_NAME if prefix else '' return self._downloader.to_screen(f'{tag}{text}', *args, **kwargs) def report_warning(self, text, *args, **kwargs): if self._downloader: return self._downloader.report_warning(text, *args, **kwargs) def deprecation_warning(self, msg): warn = getattr(self._downloader, 'deprecation_warning', deprecation_warning) return warn(msg, stacklevel=1) def deprecated_feature(self, msg): if self._downloader: return self._downloader.deprecated_feature(msg) return deprecation_warning(msg, stacklevel=1) def report_error(self, text, *args, **kwargs): self.deprecation_warning('"yt_dlp.postprocessor.PostProcessor.report_error" is deprecated. ' 'raise "yt_dlp.utils.PostProcessingError" instead') if self._downloader: return self._downloader.report_error(text, *args, **kwargs) def write_debug(self, text, *args, **kwargs): if self._downloader: return self._downloader.write_debug(text, *args, **kwargs) def _delete_downloaded_files(self, *files_to_delete, **kwargs): if self._downloader: return self._downloader._delete_downloaded_files(*files_to_delete, **kwargs) for filename in set(filter(None, files_to_delete)): os.remove(filename) def get_param(self, name, default=None, *args, **kwargs): if self._downloader: return self._downloader.params.get(name, default, *args, **kwargs) return default def set_downloader(self, downloader): """Sets the downloader for this PP.""" self._downloader = downloader for ph in getattr(downloader, '_postprocessor_hooks', []): self.add_progress_hook(ph) def _copy_infodict(self, info_dict): return getattr(self._downloader, '_copy_infodict', dict)(info_dict) @staticmethod def _restrict_to(*, video=True, audio=True, images=True, simulated=True): allowed = {'video': video, 'audio': audio, 'images': images} def decorator(func): @functools.wraps(func) def wrapper(self, info): if not simulated and (self.get_param('simulate') or self.get_param('skip_download')): return [], info format_type = ( 'video' if info.get('vcodec') != 'none' else 'audio' if info.get('acodec') != 'none' else 'images') if allowed[format_type]: return func(self, info) else: self.to_screen('Skipping %s' % format_type) return [], info return wrapper return decorator def run(self, information): """Run the PostProcessor. The "information" argument is a dictionary like the ones composed by InfoExtractors. The only difference is that this one has an extra field called "filepath" that points to the downloaded file. This method returns a tuple, the first element is a list of the files that can be deleted, and the second of which is the updated information. In addition, this method may raise a PostProcessingError exception if post processing fails. """ return [], information # by default, keep file and do nothing def try_utime(self, path, atime, mtime, errnote='Cannot update utime of file'): try: os.utime(encodeFilename(path), (atime, mtime)) except Exception: self.report_warning(errnote) def _configuration_args(self, exe, *args, **kwargs): return _configuration_args( self.pp_key(), self.get_param('postprocessor_args'), exe, *args, **kwargs) def _hook_progress(self, status, info_dict): if not self._progress_hooks: return status.update({ 'info_dict': info_dict, 'postprocessor': self.pp_key(), }) for ph in self._progress_hooks: ph(status) def add_progress_hook(self, ph): # See YoutubeDl.py (search for postprocessor_hooks) for a description of this interface self._progress_hooks.append(ph) def report_progress(self, s): s['_default_template'] = '%(postprocessor)s %(status)s' % s if not self._downloader: return progress_dict = s.copy() progress_dict.pop('info_dict') progress_dict = {'info': s['info_dict'], 'progress': progress_dict} progress_template = self.get_param('progress_template', {}) tmpl = progress_template.get('postprocess') if tmpl: self._downloader.to_screen( self._downloader.evaluate_outtmpl(tmpl, progress_dict), quiet=False) self._downloader.to_console_title(self._downloader.evaluate_outtmpl( progress_template.get('postprocess-title') or 'yt-dlp %(progress._default_template)s', progress_dict)) def _retry_download(self, err, count, retries): # While this is not an extractor, it behaves similar to one and # so obey extractor_retries and "--retry-sleep extractor" RetryManager.report_retry(err, count, retries, info=self.to_screen, warn=self.report_warning, sleep_func=self.get_param('retry_sleep_functions', {}).get('extractor')) def _download_json(self, url, *, expected_http_errors=(404,)): self.write_debug(f'{self.PP_NAME} query: {url}') for retry in RetryManager(self.get_param('extractor_retries', 3), self._retry_download): try: rsp = self._downloader.urlopen(Request(url)) except network_exceptions as e: if isinstance(e, HTTPError) and e.status in expected_http_errors: return None retry.error = PostProcessingError(f'Unable to communicate with {self.PP_NAME} API: {e}') continue return json.loads(rsp.read().decode(rsp.headers.get_param('charset') or 'utf-8')) class AudioConversionError(PostProcessingError): # Deprecated pass