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https://github.com/yt-dlp/yt-dlp
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[extractor, cleanup] Refactor _download_... methods
This commit is contained in:
pukkandan
parent
8a7f6d7a15
commit
617f658b7e
1 changed files with 101 additions and 168 deletions
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@ -791,8 +791,35 @@ class InfoExtractor:
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"""
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Return a tuple (page content as string, URL handle).
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See _download_webpage docstring for arguments specification.
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Arguments:
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url_or_request -- plain text URL as a string or
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a compat_urllib_request.Requestobject
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video_id -- Video/playlist/item identifier (string)
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Keyword arguments:
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note -- note printed before downloading (string)
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errnote -- note printed in case of an error (string)
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fatal -- flag denoting whether error should be considered fatal,
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i.e. whether it should cause ExtractionError to be raised,
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otherwise a warning will be reported and extraction continued
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encoding -- encoding for a page content decoding, guessed automatically
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when not explicitly specified
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data -- POST data (bytes)
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headers -- HTTP headers (dict)
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query -- URL query (dict)
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expected_status -- allows to accept failed HTTP requests (non 2xx
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status code) by explicitly specifying a set of accepted status
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codes. Can be any of the following entities:
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- an integer type specifying an exact failed status code to
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accept
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- a list or a tuple of integer types specifying a list of
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failed status codes to accept
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- a callable accepting an actual failed status code and
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returning True if it should be accepted
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Note that this argument does not affect success status codes (2xx)
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which are always accepted.
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"""
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# Strip hashes from the URL (#1038)
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if isinstance(url_or_request, (compat_str, str)):
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url_or_request = url_or_request.partition('#')[0]
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@ -887,102 +914,6 @@ class InfoExtractor:
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return content
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def _download_webpage(
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self, url_or_request, video_id, note=None, errnote=None,
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fatal=True, tries=1, timeout=5, encoding=None, data=None,
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headers={}, query={}, expected_status=None):
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"""
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Return the data of the page as a string.
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Arguments:
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url_or_request -- plain text URL as a string or
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a compat_urllib_request.Requestobject
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video_id -- Video/playlist/item identifier (string)
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Keyword arguments:
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note -- note printed before downloading (string)
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errnote -- note printed in case of an error (string)
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fatal -- flag denoting whether error should be considered fatal,
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i.e. whether it should cause ExtractionError to be raised,
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otherwise a warning will be reported and extraction continued
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tries -- number of tries
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timeout -- sleep interval between tries
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encoding -- encoding for a page content decoding, guessed automatically
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when not explicitly specified
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data -- POST data (bytes)
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headers -- HTTP headers (dict)
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query -- URL query (dict)
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expected_status -- allows to accept failed HTTP requests (non 2xx
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status code) by explicitly specifying a set of accepted status
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codes. Can be any of the following entities:
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- an integer type specifying an exact failed status code to
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accept
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- a list or a tuple of integer types specifying a list of
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failed status codes to accept
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- a callable accepting an actual failed status code and
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returning True if it should be accepted
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Note that this argument does not affect success status codes (2xx)
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which are always accepted.
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"""
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success = False
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try_count = 0
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while success is False:
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try:
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res = self._download_webpage_handle(
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url_or_request, video_id, note, errnote, fatal,
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encoding=encoding, data=data, headers=headers, query=query,
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expected_status=expected_status)
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success = True
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except compat_http_client.IncompleteRead as e:
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try_count += 1
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if try_count >= tries:
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raise e
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self._sleep(timeout, video_id)
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if res is False:
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return res
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else:
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content, _ = res
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return content
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def _download_xml_handle(
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self, url_or_request, video_id, note='Downloading XML',
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errnote='Unable to download XML', transform_source=None,
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fatal=True, encoding=None, data=None, headers={}, query={},
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expected_status=None):
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"""
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Return a tuple (xml as an xml.etree.ElementTree.Element, URL handle).
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See _download_webpage docstring for arguments specification.
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"""
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res = self._download_webpage_handle(
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url_or_request, video_id, note, errnote, fatal=fatal,
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encoding=encoding, data=data, headers=headers, query=query,
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expected_status=expected_status)
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if res is False:
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return res
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xml_string, urlh = res
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return self._parse_xml(
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xml_string, video_id, transform_source=transform_source,
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fatal=fatal), urlh
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def _download_xml(
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self, url_or_request, video_id,
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note='Downloading XML', errnote='Unable to download XML',
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transform_source=None, fatal=True, encoding=None,
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data=None, headers={}, query={}, expected_status=None):
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"""
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Return the xml as an xml.etree.ElementTree.Element.
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See _download_webpage docstring for arguments specification.
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"""
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res = self._download_xml_handle(
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url_or_request, video_id, note=note, errnote=errnote,
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transform_source=transform_source, fatal=fatal, encoding=encoding,
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data=data, headers=headers, query=query,
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expected_status=expected_status)
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return res if res is False else res[0]
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def _parse_xml(self, xml_string, video_id, transform_source=None, fatal=True):
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if transform_source:
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xml_string = transform_source(xml_string)
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@ -995,44 +926,6 @@ class InfoExtractor:
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else:
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self.report_warning(errmsg + str(ve))
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def _download_json_handle(
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self, url_or_request, video_id, note='Downloading JSON metadata',
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errnote='Unable to download JSON metadata', transform_source=None,
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fatal=True, encoding=None, data=None, headers={}, query={},
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expected_status=None):
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"""
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Return a tuple (JSON object, URL handle).
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See _download_webpage docstring for arguments specification.
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"""
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res = self._download_webpage_handle(
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url_or_request, video_id, note, errnote, fatal=fatal,
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encoding=encoding, data=data, headers=headers, query=query,
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expected_status=expected_status)
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if res is False:
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return res
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json_string, urlh = res
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return self._parse_json(
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json_string, video_id, transform_source=transform_source,
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fatal=fatal), urlh
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def _download_json(
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self, url_or_request, video_id, note='Downloading JSON metadata',
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errnote='Unable to download JSON metadata', transform_source=None,
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fatal=True, encoding=None, data=None, headers={}, query={},
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expected_status=None):
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"""
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Return the JSON object as a dict.
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See _download_webpage docstring for arguments specification.
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"""
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res = self._download_json_handle(
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url_or_request, video_id, note=note, errnote=errnote,
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transform_source=transform_source, fatal=fatal, encoding=encoding,
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data=data, headers=headers, query=query,
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expected_status=expected_status)
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return res if res is False else res[0]
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def _parse_json(self, json_string, video_id, transform_source=None, fatal=True, lenient=False):
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if transform_source:
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json_string = transform_source(json_string)
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@ -1058,44 +951,84 @@ class InfoExtractor:
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data[data.find('{'):data.rfind('}') + 1],
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video_id, transform_source, fatal)
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def _download_socket_json_handle(
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self, url_or_request, video_id, note='Polling socket',
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errnote='Unable to poll socket', transform_source=None,
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fatal=True, encoding=None, data=None, headers={}, query={},
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expected_status=None):
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"""
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Return a tuple (JSON object, URL handle).
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def __create_download_methods(name, parser, note, errnote, return_value):
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See _download_webpage docstring for arguments specification.
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"""
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res = self._download_webpage_handle(
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url_or_request, video_id, note, errnote, fatal=fatal,
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encoding=encoding, data=data, headers=headers, query=query,
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expected_status=expected_status)
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def parse(ie, content, *args, **kwargs):
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if parser is None:
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return content
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# parser is fetched by name so subclasses can override it
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return getattr(ie, parser)(content, *args, **kwargs)
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def download_handle(self, url_or_request, video_id, note=note, errnote=errnote,
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transform_source=None, fatal=True, *args, **kwargs):
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res = self._download_webpage_handle(url_or_request, video_id, note, errnote, fatal, *args, **kwargs)
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if res is False:
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return res
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webpage, urlh = res
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return self._parse_socket_response_as_json(
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webpage, video_id, transform_source=transform_source,
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fatal=fatal), urlh
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content, urlh = res
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return parse(self, content, video_id, transform_source, fatal), urlh
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def _download_socket_json(
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self, url_or_request, video_id, note='Polling socket',
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errnote='Unable to poll socket', transform_source=None,
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fatal=True, encoding=None, data=None, headers={}, query={},
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expected_status=None):
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"""
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Return the JSON object as a dict.
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See _download_webpage docstring for arguments specification.
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"""
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res = self._download_socket_json_handle(
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url_or_request, video_id, note=note, errnote=errnote,
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transform_source=transform_source, fatal=fatal, encoding=encoding,
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data=data, headers=headers, query=query,
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expected_status=expected_status)
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def download_content(
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self, url_or_request, video_id, note=note, errnote=errnote, transform_source=None, *args, **kwargs):
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args = [url_or_request, video_id, note, errnote, transform_source, *args]
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if parser is None:
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args.pop(4) # transform_source
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# The method is fetched by name so subclasses can override _download_..._handle
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res = getattr(self, download_handle.__name__)(*args, **kwargs)
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return res if res is False else res[0]
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def impersonate(func, name, return_value):
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func.__name__, func.__qualname__ = name, f'InfoExtractor.{name}'
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func.__doc__ = f'''
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@param transform_source Apply this transformation before parsing
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@returns {return_value}
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See _download_webpage_handle docstring for other arguments specification
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'''
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impersonate(download_handle, f'_download_{name}_handle', f'({return_value}, URL handle)')
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impersonate(download_content, f'_download_{name}', f'{return_value}')
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return download_handle, download_content
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_download_xml_handle, _download_xml = __create_download_methods(
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'xml', '_parse_xml', 'Downloading XML', 'Unable to download XML', 'xml as an xml.etree.ElementTree.Element')
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_download_json_handle, _download_json = __create_download_methods(
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'json', '_parse_json', 'Downloading JSON metadata', 'Unable to download JSON metadata', 'JSON object as a dict')
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_download_socket_json_handle, _download_socket_json = __create_download_methods(
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'socket_json', '_parse_socket_response_as_json', 'Polling socket', 'Unable to poll socket', 'JSON object as a dict')
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__download_webpage = __create_download_methods('webpage', None, None, None, 'data of the page as a string')[1]
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def _download_webpage(
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self, url_or_request, video_id, note=None, errnote=None,
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fatal=True, tries=1, timeout=NO_DEFAULT, *args, **kwargs):
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"""
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Return the data of the page as a string.
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Keyword arguments:
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tries -- number of tries
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timeout -- sleep interval between tries
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See _download_webpage_handle docstring for other arguments specification.
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"""
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R''' # NB: These are unused; should they be deprecated?
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if tries != 1:
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self._downloader.deprecation_warning('tries argument is deprecated in InfoExtractor._download_webpage')
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if timeout is NO_DEFAULT:
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timeout = 5
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else:
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self._downloader.deprecation_warning('timeout argument is deprecated in InfoExtractor._download_webpage')
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'''
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try_count = 0
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while True:
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try:
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return self.__download_webpage(url_or_request, video_id, note, errnote, None, fatal, *args, **kwargs)
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except compat_http_client.IncompleteRead as e:
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try_count += 1
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if try_count >= tries:
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raise e
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self._sleep(timeout, video_id)
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def report_warning(self, msg, video_id=None, *args, only_once=False, **kwargs):
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idstr = format_field(video_id, template='%s: ')
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msg = f'[{self.IE_NAME}] {idstr}{msg}'
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