X-Git-Url: https://git.rapsys.eu/youtubedl/blobdiff_plain/099764c0c91f4ad7db03d9347798f8619383ea7e..67afe88251ff8b1fcb43246c9a4bb1a0ea0185a2:/youtube_dl/extractor/common.py?ds=inline
diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 93a5a3d..cecf917 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -13,6 +13,8 @@ import time
import xml.etree.ElementTree
from ..compat import (
+ compat_cookiejar,
+ compat_HTTPError,
compat_http_client,
compat_urllib_error,
compat_urllib_parse_urlparse,
@@ -20,6 +22,8 @@ from ..compat import (
compat_str,
)
from ..utils import (
+ age_restricted,
+ bug_reports_message,
clean_html,
compiled_regex_type,
ExtractorError,
@@ -39,11 +43,11 @@ class InfoExtractor(object):
information about the video (or videos) the URL refers to. This
information includes the real video URL, the video title, author and
others. The information is stored in a dictionary which is then
- passed to the FileDownloader. The FileDownloader processes this
+ passed to the YoutubeDL. The YoutubeDL processes this
information possibly downloading the video to the file system, among
other possible outcomes.
- The type field determines the the type of the result.
+ The type field determines the type of the result.
By far the most common value (and the default if _type is missing) is
"video", which indicates a single video.
@@ -85,12 +89,15 @@ class InfoExtractor(object):
* player_url SWF Player URL (used for rtmpdump).
* protocol The protocol that will be used for the actual
download, lower-case.
- "http", "https", "rtsp", "rtmp", "m3u8" or so.
+ "http", "https", "rtsp", "rtmp", "rtmpe",
+ "m3u8", or "m3u8_native".
* preference Order number of this format. If this field is
present and not None, the formats get sorted
by this field, regardless of all other values.
-1 for default (order by other properties),
-2 or smaller for less than default.
+ < -1000 to hide the format (if there is
+ another one which is strictly better)
* language_preference Is this in the correct requested
language?
10 if it's what the URL is about,
@@ -104,12 +111,14 @@ class InfoExtractor(object):
(quality takes higher priority)
-1 for default (order by other properties),
-2 or smaller for less than default.
- * http_referer HTTP Referer header value to set.
- * http_method HTTP method to use for the download.
* http_headers A dictionary of additional HTTP headers
to add to the request.
- * http_post_data Additional data to send with a POST
- request.
+ * stretched_ratio If given and not 1, indicates that the
+ video's pixels are not square.
+ width : height ratio as float.
+ * no_resume The server does not support resuming the
+ (HTTP or RTMP) download. Boolean.
+
url: Final video URL.
ext: Video filename extension.
format: The video format, defaults to ext (used for --get-format)
@@ -117,31 +126,53 @@ class InfoExtractor(object):
The following fields are optional:
+ alt_title: A secondary title of the video.
display_id An alternative identifier for the video, not necessarily
unique, but available before title. Typically, id is
something like "4234987", title "Dancing naked mole rats",
and display_id "dancing-naked-mole-rats"
thumbnails: A list of dictionaries, with the following entries:
+ * "id" (optional, string) - Thumbnail format ID
* "url"
+ * "preference" (optional, int) - quality of the image
* "width" (optional, int)
* "height" (optional, int)
* "resolution" (optional, string "{width}x{height"},
deprecated)
thumbnail: Full URL to a video thumbnail image.
- description: One-line video description.
+ description: Full video description.
uploader: Full name of the video uploader.
+ creator: The main artist who created the video.
timestamp: UNIX timestamp of the moment the video became available.
upload_date: Video upload date (YYYYMMDD).
If not explicitly set, calculated from timestamp.
uploader_id: Nickname or id of the video uploader.
location: Physical location where the video was filmed.
- subtitles: The subtitle file contents as a dictionary in the format
- {language: subtitles}.
+ subtitles: The available subtitles as a dictionary in the format
+ {language: subformats}. "subformats" is a list sorted from
+ lower to higher preference, each element is a dictionary
+ with the "ext" entry and one of:
+ * "data": The subtitles file contents
+ * "url": A url pointing to the subtitles file
+ automatic_captions: Like 'subtitles', used by the YoutubeIE for
+ automatically generated captions
duration: Length of the video in seconds, as an integer.
view_count: How many users have watched the video on the platform.
like_count: Number of positive ratings of the video
dislike_count: Number of negative ratings of the video
+ average_rating: Average rating give by users, the scale used depends on the webpage
comment_count: Number of comments on the video
+ comments: A list of comments, each with one or more of the following
+ properties (all but one of text or html optional):
+ * "author" - human-readable name of the comment author
+ * "author_id" - user ID of the comment author
+ * "id" - Comment ID
+ * "html" - Comment as HTML
+ * "text" - Plain text of the comment
+ * "timestamp" - UNIX timestamp of comment
+ * "parent" - ID of the comment this one is replying to.
+ Set to "root" to indicate that this is a
+ comment to the original video.
age_limit: Age restriction for the video, as an integer (years)
webpage_url: The url to the video webpage, if given to youtube-dl it
should allow to get the same result again. (It will be set
@@ -157,8 +188,8 @@ class InfoExtractor(object):
_type "playlist" indicates multiple videos.
- There must be a key "entries", which is a list or a PagedList object, each
- element of which is a valid dictionary under this specfication.
+ There must be a key "entries", which is a list, an iterable, or a PagedList
+ object, each element of which is a valid dictionary by this specification.
Additionally, playlists can have "title" and "id" attributes with the same
semantics as videos (see above).
@@ -173,9 +204,10 @@ class InfoExtractor(object):
_type "url" indicates that the video must be extracted from another
location, possibly by a different extractor. Its only required key is:
"url" - the next URL to extract.
-
- Additionally, it may have properties believed to be identical to the
- resolved entity, for example "title" if the title of the referred video is
+ The key "ie_key" can be set to the class name (minus the trailing "IE",
+ e.g. "Youtube") if the extractor class is known in advance.
+ Additionally, the dictionary may have any properties of the resolved entity
+ known in advance, for example "title" if the title of the referred video is
known ahead of time.
@@ -236,8 +268,15 @@ class InfoExtractor(object):
def extract(self, url):
"""Extracts URL information and returns it in list of dicts."""
- self.initialize()
- return self._real_extract(url)
+ try:
+ self.initialize()
+ return self._real_extract(url)
+ except ExtractorError:
+ raise
+ except compat_http_client.IncompleteRead as e:
+ raise ExtractorError('A network error has occured.', cause=e, expected=True)
+ except (KeyError, StopIteration) as e:
+ raise ExtractorError('An extractor error has occured.', cause=e)
def set_downloader(self, downloader):
"""Sets the downloader for this IE."""
@@ -283,7 +322,7 @@ class InfoExtractor(object):
self._downloader.report_warning(errmsg)
return False
- def _download_webpage_handle(self, url_or_request, video_id, note=None, errnote=None, fatal=True):
+ def _download_webpage_handle(self, url_or_request, video_id, note=None, errnote=None, fatal=True, encoding=None):
""" Returns a tuple (page content as string, URL handle) """
# Strip hashes from the URL (#1038)
if isinstance(url_or_request, (compat_str, str)):
@@ -293,12 +332,11 @@ class InfoExtractor(object):
if urlh is False:
assert not fatal
return False
- content = self._webpage_read_content(urlh, url_or_request, video_id, note, errnote, fatal)
+ content = self._webpage_read_content(urlh, url_or_request, video_id, note, errnote, fatal, encoding=encoding)
return (content, urlh)
- def _webpage_read_content(self, urlh, url_or_request, video_id, note=None, errnote=None, fatal=True):
- content_type = urlh.headers.get('Content-Type', '')
- webpage_bytes = urlh.read()
+ @staticmethod
+ def _guess_encoding_from_content(content_type, webpage_bytes):
m = re.match(r'[a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+\s*;\s*charset=(.+)', content_type)
if m:
encoding = m.group(1)
@@ -311,6 +349,16 @@ class InfoExtractor(object):
encoding = 'utf-16'
else:
encoding = 'utf-8'
+
+ return encoding
+
+ def _webpage_read_content(self, urlh, url_or_request, video_id, note=None, errnote=None, fatal=True, prefix=None, encoding=None):
+ content_type = urlh.headers.get('Content-Type', '')
+ webpage_bytes = urlh.read()
+ if prefix is not None:
+ webpage_bytes = prefix + webpage_bytes
+ if not encoding:
+ encoding = self._guess_encoding_from_content(content_type, webpage_bytes)
if self._downloader.params.get('dump_intermediate_pages', False):
try:
url = url_or_request.get_full_url()
@@ -354,12 +402,32 @@ class InfoExtractor(object):
if blocked_iframe:
msg += ' Visit %s for more details' % blocked_iframe
raise ExtractorError(msg, expected=True)
+ if 'The URL you requested has been blocked' in content[:512]:
+ msg = (
+ 'Access to this webpage has been blocked by Indian censorship. '
+ 'Use a VPN or proxy server (with --proxy) to route around it.')
+ block_msg = self._html_search_regex(
+ r'(.*?)
',
+ content, 'block message', default=None)
+ if block_msg:
+ msg += ' (Message: "%s")' % block_msg.replace('\n', ' ')
+ raise ExtractorError(msg, expected=True)
return content
- def _download_webpage(self, url_or_request, video_id, note=None, errnote=None, fatal=True):
+ def _download_webpage(self, url_or_request, video_id, note=None, errnote=None, fatal=True, tries=1, timeout=5, encoding=None):
""" Returns the data of the page as a string """
- res = self._download_webpage_handle(url_or_request, video_id, note, errnote, fatal)
+ success = False
+ try_count = 0
+ while success is False:
+ try:
+ res = self._download_webpage_handle(url_or_request, video_id, note, errnote, fatal, encoding=encoding)
+ success = True
+ except compat_http_client.IncompleteRead as e:
+ try_count += 1
+ if try_count >= tries:
+ raise e
+ self._sleep(timeout, video_id)
if res is False:
return res
else:
@@ -368,10 +436,10 @@ class InfoExtractor(object):
def _download_xml(self, url_or_request, video_id,
note='Downloading XML', errnote='Unable to download XML',
- transform_source=None, fatal=True):
+ transform_source=None, fatal=True, encoding=None):
"""Return the xml as an xml.etree.ElementTree.Element"""
xml_string = self._download_webpage(
- url_or_request, video_id, note, errnote, fatal=fatal)
+ url_or_request, video_id, note, errnote, fatal=fatal, encoding=encoding)
if xml_string is False:
return xml_string
if transform_source:
@@ -382,11 +450,16 @@ class InfoExtractor(object):
note='Downloading JSON metadata',
errnote='Unable to download JSON metadata',
transform_source=None,
- fatal=True):
+ fatal=True, encoding=None):
json_string = self._download_webpage(
- url_or_request, video_id, note, errnote, fatal=fatal)
+ url_or_request, video_id, note, errnote, fatal=fatal,
+ encoding=encoding)
if (not fatal) and json_string is False:
return None
+ return self._parse_json(
+ json_string, video_id, transform_source=transform_source, fatal=fatal)
+
+ def _parse_json(self, json_string, video_id, transform_source=None, fatal=True):
if transform_source:
json_string = transform_source(json_string)
try:
@@ -423,19 +496,22 @@ class InfoExtractor(object):
"""Report attempt to log in."""
self.to_screen('Logging in')
- #Methods for following #608
+ # Methods for following #608
@staticmethod
- def url_result(url, ie=None, video_id=None):
+ def url_result(url, ie=None, video_id=None, video_title=None):
"""Returns a url that points to a page that should be processed"""
- #TODO: ie should be the class used for getting the info
+ # TODO: ie should be the class used for getting the info
video_info = {'_type': 'url',
'url': url,
'ie_key': ie}
if video_id is not None:
video_info['id'] = video_id
+ if video_title is not None:
+ video_info['title'] = video_title
return video_info
+
@staticmethod
- def playlist_result(entries, playlist_id=None, playlist_title=None):
+ def playlist_result(entries, playlist_id=None, playlist_title=None, playlist_description=None):
"""Returns a playlist"""
video_info = {'_type': 'playlist',
'entries': entries}
@@ -443,6 +519,8 @@ class InfoExtractor(object):
video_info['id'] = playlist_id
if playlist_title:
video_info['title'] = playlist_title
+ if playlist_description:
+ video_info['description'] = playlist_description
return video_info
def _search_regex(self, pattern, string, name, default=_NO_DEFAULT, fatal=True, flags=0, group=None):
@@ -460,7 +538,7 @@ class InfoExtractor(object):
if mobj:
break
- if os.name != 'nt' and sys.stderr.isatty():
+ if not self._downloader.params.get('no_color') and os.name != 'nt' and sys.stderr.isatty():
_name = '\033[0;34m%s\033[0m' % name
else:
_name = name
@@ -476,8 +554,7 @@ class InfoExtractor(object):
elif fatal:
raise RegexNotFoundError('Unable to extract %s' % _name)
else:
- self._downloader.report_warning('unable to extract %s; '
- 'please report this issue on http://yt-dl.org/bug' % _name)
+ self._downloader.report_warning('unable to extract %s' % _name + bug_reports_message())
return None
def _html_search_regex(self, pattern, string, name, default=_NO_DEFAULT, fatal=True, flags=0, group=None):
@@ -492,7 +569,7 @@ class InfoExtractor(object):
def _get_login_info(self):
"""
- Get the the login info as (username, password)
+ Get the login info as (username, password)
It will look in the netrc file using the _NETRC_MACHINE value
If there's no info available, return (None, None)
"""
@@ -517,7 +594,7 @@ class InfoExtractor(object):
raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
except (IOError, netrc.NetrcParseError) as err:
self._downloader.report_warning('parsing .netrc: %s' % compat_str(err))
-
+
return (username, password)
def _get_tfa_info(self):
@@ -577,9 +654,9 @@ class InfoExtractor(object):
if display_name is None:
display_name = name
return self._html_search_regex(
- r'''(?ix)]+(?:itemprop|name|property)=(["\']?)%s\1)
- [^>]+content=(["\'])(?P.*?)\1''' % re.escape(name),
+ [^>]+?content=(["\'])(?P.*?)\2''' % re.escape(name),
html, display_name, fatal=fatal, group='content', **kwargs)
def _dc_search_uploader(self, html):
@@ -609,11 +686,26 @@ class InfoExtractor(object):
}
return RATING_TABLE.get(rating.lower(), None)
+ def _family_friendly_search(self, html):
+ # See http://schema.org/VideoObject
+ family_friendly = self._html_search_meta('isFamilyFriendly', html)
+
+ if not family_friendly:
+ return None
+
+ RATING_TABLE = {
+ '1': 0,
+ 'true': 0,
+ '0': 18,
+ 'false': 18,
+ }
+ return RATING_TABLE.get(family_friendly.lower(), None)
+
def _twitter_search_player(self, html):
return self._html_search_meta('twitter:player', html,
- 'twitter card player')
+ 'twitter card player')
- def _sort_formats(self, formats):
+ def _sort_formats(self, formats, field_preference=None):
if not formats:
raise ExtractorError('No video formats found')
@@ -623,6 +715,9 @@ class InfoExtractor(object):
if not f.get('ext') and 'url' in f:
f['ext'] = determine_ext(f['url'])
+ if isinstance(field_preference, (list, tuple)):
+ return tuple(f.get(field) if f.get(field) is not None else -1 for field in field_preference)
+
preference = f.get('preference')
if preference is None:
proto = f.get('protocol')
@@ -658,21 +753,44 @@ class InfoExtractor(object):
preference,
f.get('language_preference') if f.get('language_preference') is not None else -1,
f.get('quality') if f.get('quality') is not None else -1,
+ f.get('tbr') if f.get('tbr') is not None else -1,
+ f.get('filesize') if f.get('filesize') is not None else -1,
+ f.get('vbr') if f.get('vbr') is not None else -1,
f.get('height') if f.get('height') is not None else -1,
f.get('width') if f.get('width') is not None else -1,
ext_preference,
- f.get('tbr') if f.get('tbr') is not None else -1,
- f.get('vbr') if f.get('vbr') is not None else -1,
f.get('abr') if f.get('abr') is not None else -1,
audio_ext_preference,
f.get('fps') if f.get('fps') is not None else -1,
- f.get('filesize') if f.get('filesize') is not None else -1,
f.get('filesize_approx') if f.get('filesize_approx') is not None else -1,
f.get('source_preference') if f.get('source_preference') is not None else -1,
- f.get('format_id'),
+ f.get('format_id') if f.get('format_id') is not None else '',
)
formats.sort(key=_formats_key)
+ def _check_formats(self, formats, video_id):
+ if formats:
+ formats[:] = filter(
+ lambda f: self._is_valid_url(
+ f['url'], video_id,
+ item='%s video format' % f.get('format_id') if f.get('format_id') else 'video'),
+ formats)
+
+ def _is_valid_url(self, url, video_id, item='video'):
+ url = self._proto_relative_url(url, scheme='http:')
+ # For now assume non HTTP(S) URLs always valid
+ if not (url.startswith('http://') or url.startswith('https://')):
+ return True
+ try:
+ self._request_webpage(url, video_id, 'Checking %s URL' % item)
+ return True
+ except ExtractorError as e:
+ if isinstance(e.cause, compat_HTTPError):
+ self.to_screen(
+ '%s: %s URL is invalid, skipping' % (video_id, item))
+ return False
+ raise
+
def http_scheme(self):
""" Either "http:" or "https:", depending on the user's preferences """
return (
@@ -697,37 +815,45 @@ class InfoExtractor(object):
self.to_screen(msg)
time.sleep(timeout)
- def _extract_f4m_formats(self, manifest_url, video_id):
+ def _extract_f4m_formats(self, manifest_url, video_id, preference=None, f4m_id=None):
manifest = self._download_xml(
manifest_url, video_id, 'Downloading f4m manifest',
'Unable to download f4m manifest')
formats = []
+ manifest_version = '1.0'
media_nodes = manifest.findall('{http://ns.adobe.com/f4m/1.0}media')
+ if not media_nodes:
+ manifest_version = '2.0'
+ media_nodes = manifest.findall('{http://ns.adobe.com/f4m/2.0}media')
for i, media_el in enumerate(media_nodes):
+ if manifest_version == '2.0':
+ manifest_url = ('/'.join(manifest_url.split('/')[:-1]) + '/' +
+ (media_el.attrib.get('href') or media_el.attrib.get('url')))
tbr = int_or_none(media_el.attrib.get('bitrate'))
- format_id = 'f4m-%d' % (i if tbr is None else tbr)
formats.append({
- 'format_id': format_id,
+ 'format_id': '-'.join(filter(None, [f4m_id, compat_str(i if tbr is None else tbr)])),
'url': manifest_url,
'ext': 'flv',
'tbr': tbr,
'width': int_or_none(media_el.attrib.get('width')),
'height': int_or_none(media_el.attrib.get('height')),
+ 'preference': preference,
})
self._sort_formats(formats)
return formats
def _extract_m3u8_formats(self, m3u8_url, video_id, ext=None,
- entry_protocol='m3u8', preference=None):
+ entry_protocol='m3u8', preference=None,
+ m3u8_id=None):
formats = [{
- 'format_id': 'm3u8-meta',
+ 'format_id': '-'.join(filter(None, [m3u8_id, 'meta'])),
'url': m3u8_url,
'ext': ext,
'protocol': 'm3u8',
- 'preference': -1,
+ 'preference': preference - 1 if preference else -1,
'resolution': 'multiple',
'format_note': 'Quality selection URL',
}]
@@ -742,6 +868,7 @@ class InfoExtractor(object):
note='Downloading m3u8 information',
errnote='Failed to download m3u8 information')
last_info = None
+ last_media = None
kv_rex = re.compile(
r'(?P[a-zA-Z_-]+)=(?P"[^"]+"|[^",]+)(?:,|$)')
for line in m3u8_doc.splitlines():
@@ -752,6 +879,13 @@ class InfoExtractor(object):
if v.startswith('"'):
v = v[1:-1]
last_info[m.group('key')] = v
+ elif line.startswith('#EXT-X-MEDIA:'):
+ last_media = {}
+ for m in kv_rex.finditer(line):
+ v = m.group('val')
+ if v.startswith('"'):
+ v = v[1:-1]
+ last_media[m.group('key')] = v
elif line.startswith('#') or not line.strip():
continue
else:
@@ -759,9 +893,13 @@ class InfoExtractor(object):
formats.append({'url': format_url(line)})
continue
tbr = int_or_none(last_info.get('BANDWIDTH'), scale=1000)
-
+ format_id = []
+ if m3u8_id:
+ format_id.append(m3u8_id)
+ last_media_name = last_media.get('NAME') if last_media and last_media.get('TYPE') != 'SUBTITLES' else None
+ format_id.append(last_media_name if last_media_name else '%d' % (tbr if tbr else len(formats)))
f = {
- 'format_id': 'm3u8-%d' % (tbr if tbr else len(formats)),
+ 'format_id': '-'.join(format_id),
'url': format_url(line.strip()),
'tbr': tbr,
'ext': ext,
@@ -781,11 +919,78 @@ class InfoExtractor(object):
width_str, height_str = resolution.split('x')
f['width'] = int(width_str)
f['height'] = int(height_str)
+ if last_media is not None:
+ f['m3u8_media'] = last_media
+ last_media = None
formats.append(f)
last_info = {}
self._sort_formats(formats)
return formats
+ # TODO: improve extraction
+ def _extract_smil_formats(self, smil_url, video_id, fatal=True):
+ smil = self._download_xml(
+ smil_url, video_id, 'Downloading SMIL file',
+ 'Unable to download SMIL file', fatal=fatal)
+ if smil is False:
+ assert not fatal
+ return []
+
+ base = smil.find('./head/meta').get('base')
+
+ formats = []
+ rtmp_count = 0
+ if smil.findall('./body/seq/video'):
+ video = smil.findall('./body/seq/video')[0]
+ fmts, rtmp_count = self._parse_smil_video(video, video_id, base, rtmp_count)
+ formats.extend(fmts)
+ else:
+ for video in smil.findall('./body/switch/video'):
+ fmts, rtmp_count = self._parse_smil_video(video, video_id, base, rtmp_count)
+ formats.extend(fmts)
+
+ self._sort_formats(formats)
+
+ return formats
+
+ def _parse_smil_video(self, video, video_id, base, rtmp_count):
+ src = video.get('src')
+ if not src:
+ return ([], rtmp_count)
+ bitrate = int_or_none(video.get('system-bitrate') or video.get('systemBitrate'), 1000)
+ width = int_or_none(video.get('width'))
+ height = int_or_none(video.get('height'))
+ proto = video.get('proto')
+ if not proto:
+ if base:
+ if base.startswith('rtmp'):
+ proto = 'rtmp'
+ elif base.startswith('http'):
+ proto = 'http'
+ ext = video.get('ext')
+ if proto == 'm3u8':
+ return (self._extract_m3u8_formats(src, video_id, ext), rtmp_count)
+ elif proto == 'rtmp':
+ rtmp_count += 1
+ streamer = video.get('streamer') or base
+ return ([{
+ 'url': streamer,
+ 'play_path': src,
+ 'ext': 'flv',
+ 'format_id': 'rtmp-%d' % (rtmp_count if bitrate is None else bitrate),
+ 'tbr': bitrate,
+ 'width': width,
+ 'height': height,
+ }], rtmp_count)
+ elif proto.startswith('http'):
+ return ([{
+ 'url': base + src,
+ 'ext': ext or 'flv',
+ 'tbr': bitrate,
+ 'width': width,
+ 'height': height,
+ }], rtmp_count)
+
def _live_title(self, name):
""" Generate the title for a live video """
now = datetime.datetime.now()
@@ -814,6 +1019,59 @@ class InfoExtractor(object):
self._downloader.report_warning(msg)
return res
+ def _set_cookie(self, domain, name, value, expire_time=None):
+ cookie = compat_cookiejar.Cookie(
+ 0, name, value, None, None, domain, None,
+ None, '/', True, False, expire_time, '', None, None, None)
+ self._downloader.cookiejar.set_cookie(cookie)
+
+ def get_testcases(self, include_onlymatching=False):
+ t = getattr(self, '_TEST', None)
+ if t:
+ assert not hasattr(self, '_TESTS'), \
+ '%s has _TEST and _TESTS' % type(self).__name__
+ tests = [t]
+ else:
+ tests = getattr(self, '_TESTS', [])
+ for t in tests:
+ if not include_onlymatching and t.get('only_matching', False):
+ continue
+ t['name'] = type(self).__name__[:-len('IE')]
+ yield t
+
+ def is_suitable(self, age_limit):
+ """ Test whether the extractor is generally suitable for the given
+ age limit (i.e. pornographic sites are not, all others usually are) """
+
+ any_restricted = False
+ for tc in self.get_testcases(include_onlymatching=False):
+ if 'playlist' in tc:
+ tc = tc['playlist'][0]
+ is_restricted = age_restricted(
+ tc.get('info_dict', {}).get('age_limit'), age_limit)
+ if not is_restricted:
+ return True
+ any_restricted = any_restricted or is_restricted
+ return not any_restricted
+
+ def extract_subtitles(self, *args, **kwargs):
+ if (self._downloader.params.get('writesubtitles', False) or
+ self._downloader.params.get('listsubtitles')):
+ return self._get_subtitles(*args, **kwargs)
+ return {}
+
+ def _get_subtitles(self, *args, **kwargs):
+ raise NotImplementedError("This method must be implemented by subclasses")
+
+ def extract_automatic_captions(self, *args, **kwargs):
+ if (self._downloader.params.get('writeautomaticsub', False) or
+ self._downloader.params.get('listsubtitles')):
+ return self._get_automatic_captions(*args, **kwargs)
+ return {}
+
+ def _get_automatic_captions(self, *args, **kwargs):
+ raise NotImplementedError("This method must be implemented by subclasses")
+
class SearchInfoExtractor(InfoExtractor):
"""