X-Git-Url: https://git.rapsys.eu/youtubedl/blobdiff_plain/179629569ec7a2eda04957287c17fab7e55b1a7f..a497d0e55172891fd4925626374a7afdd811e00f:/youtube_dl/extractor/common.py?ds=inline diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py index 1d98222..84fca8b 100644 --- a/youtube_dl/extractor/common.py +++ b/youtube_dl/extractor/common.py @@ -1,20 +1,28 @@ import base64 +import hashlib +import json import os import re import socket import sys import netrc +import xml.etree.ElementTree from ..utils import ( compat_http_client, compat_urllib_error, - compat_urllib_request, + compat_urllib_parse_urlparse, compat_str, clean_html, compiled_regex_type, ExtractorError, + RegexNotFoundError, + sanitize_filename, + unescapeHTML, ) +_NO_DEFAULT = object() + class InfoExtractor(object): """Information Extractor class. @@ -30,13 +38,56 @@ class InfoExtractor(object): The dictionaries must include the following fields: id: Video identifier. - url: Final video URL. title: Video title, unescaped. + + Additionally, it must contain either a formats entry or a url one: + + formats: A list of dictionaries for each format available, ordered + from worst to best quality. + + Potential fields: + * url Mandatory. The URL of the video file + * ext Will be calculated from url if missing + * format A human-readable description of the format + ("mp4 container with h264/opus"). + Calculated from the format_id, width, height. + and format_note fields if missing. + * format_id A short description of the format + ("mp4_h264_opus" or "19"). + Technically optional, but strongly recommended. + * format_note Additional info about the format + ("3D" or "DASH video") + * width Width of the video, if known + * height Height of the video, if known + * resolution Textual description of width and height + * tbr Average bitrate of audio and video in KBit/s + * abr Average audio bitrate in KBit/s + * acodec Name of the audio codec in use + * asr Audio sampling rate in Hertz + * vbr Average video bitrate in KBit/s + * vcodec Name of the video codec in use + * container Name of the container format + * filesize The number of bytes, if known in advance + * 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. + * preference Order number of this format. If this field is + present and not None, the formats get sorted + by this field. + -1 for default (order by other properties), + -2 or smaller for less than default. + * quality Order number of the video quality of this + format, irrespective of the file format. + -1 for default (order by other properties), + -2 or smaller for less than default. + url: Final video URL. ext: Video filename extension. + format: The video format, defaults to ext (used for --get-format) + player_url: SWF Player URL (used for rtmpdump). The following fields are optional: - format: The video format, defaults to ext (used for --get-format) thumbnails: A list of dictionaries (with the entries "resolution" and "url") for the varying thumbnails thumbnail: Full URL to a video thumbnail image. @@ -45,13 +96,19 @@ class InfoExtractor(object): upload_date: Video upload date (YYYYMMDD). uploader_id: Nickname or id of the video uploader. location: Physical location of the video. - player_url: SWF Player URL (used for rtmpdump). - subtitles: The subtitle file contents. + subtitles: The subtitle file contents as a dictionary in the format + {language: subtitles}. + duration: Length of the video in seconds, as an integer. view_count: How many users have watched the video on the platform. - urlhandle: [internal] The urlHandle to be used to download the file, - like returned by urllib.request.urlopen + like_count: Number of positive ratings of the video + dislike_count: Number of negative ratings of the video + comment_count: Number of comments on the 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 + by YoutubeDL if it's missing) - The fields should all be Unicode strings. + Unless mentioned otherwise, the fields should be Unicode strings. Subclasses of this one should re-define the _real_initialize() and _real_extract() methods and define a _VALID_URL regexp. @@ -76,7 +133,13 @@ class InfoExtractor(object): @classmethod def suitable(cls, url): """Receives a URL and returns True if suitable for this IE.""" - return re.match(cls._VALID_URL, url) is not None + + # This does not use has/getattr intentionally - we want to know whether + # we have cached the regexp for *this* class, whereas getattr would also + # match the superclass + if '_VALID_URL_RE' not in cls.__dict__: + cls._VALID_URL_RE = re.compile(cls._VALID_URL) + return cls._VALID_URL_RE.match(url) is not None @classmethod def working(cls): @@ -106,33 +169,63 @@ class InfoExtractor(object): """Real extraction process. Redefine in subclasses.""" pass + @classmethod + def ie_key(cls): + """A string for getting the InfoExtractor with get_info_extractor""" + return cls.__name__[:-2] + @property def IE_NAME(self): return type(self).__name__[:-2] - def _request_webpage(self, url_or_request, video_id, note=None, errnote=None): + def _request_webpage(self, url_or_request, video_id, note=None, errnote=None, fatal=True): """ Returns the response handle """ if note is None: self.report_download_webpage(video_id) elif note is not False: - self.to_screen(u'%s: %s' % (video_id, note)) + if video_id is None: + self.to_screen(u'%s' % (note,)) + else: + self.to_screen(u'%s: %s' % (video_id, note)) try: - return compat_urllib_request.urlopen(url_or_request) + return self._downloader.urlopen(url_or_request) except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err: + if errnote is False: + return False if errnote is None: errnote = u'Unable to download webpage' - raise ExtractorError(u'%s: %s' % (errnote, compat_str(err)), sys.exc_info()[2]) - - def _download_webpage_handle(self, url_or_request, video_id, note=None, errnote=None): + errmsg = u'%s: %s' % (errnote, compat_str(err)) + if fatal: + raise ExtractorError(errmsg, sys.exc_info()[2], cause=err) + else: + self._downloader.report_warning(errmsg) + return False + + def _download_webpage_handle(self, url_or_request, video_id, note=None, errnote=None, fatal=True): """ Returns a tuple (page content as string, URL handle) """ - urlh = self._request_webpage(url_or_request, video_id, note, errnote) + + # Strip hashes from the URL (#1038) + if isinstance(url_or_request, (compat_str, str)): + url_or_request = url_or_request.partition('#')[0] + + urlh = self._request_webpage(url_or_request, video_id, note, errnote, fatal) + if urlh is False: + assert not fatal + return False content_type = urlh.headers.get('Content-Type', '') + webpage_bytes = urlh.read() m = re.match(r'[a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+\s*;\s*charset=(.+)', content_type) if m: encoding = m.group(1) else: - encoding = 'utf-8' - webpage_bytes = urlh.read() + m = re.search(br']+charset=[\'"]?([^\'")]+)[ /\'">]', + webpage_bytes[:1024]) + if m: + encoding = m.group(1).decode('ascii') + elif webpage_bytes.startswith(b'\xff\xfe'): + encoding = 'utf-16' + else: + encoding = 'utf-8' if self._downloader.params.get('dump_intermediate_pages', False): try: url = url_or_request.get_full_url() @@ -141,12 +234,57 @@ class InfoExtractor(object): self.to_screen(u'Dumping request to ' + url) dump = base64.b64encode(webpage_bytes).decode('ascii') self._downloader.to_screen(dump) + if self._downloader.params.get('write_pages', False): + try: + url = url_or_request.get_full_url() + except AttributeError: + url = url_or_request + if len(url) > 200: + h = u'___' + hashlib.md5(url.encode('utf-8')).hexdigest() + url = url[:200 - len(h)] + h + raw_filename = ('%s_%s.dump' % (video_id, url)) + filename = sanitize_filename(raw_filename, restricted=True) + self.to_screen(u'Saving request to ' + filename) + with open(filename, 'wb') as outf: + outf.write(webpage_bytes) + content = webpage_bytes.decode(encoding, 'replace') return (content, urlh) - def _download_webpage(self, url_or_request, video_id, note=None, errnote=None): + def _download_webpage(self, url_or_request, video_id, note=None, errnote=None, fatal=True): """ Returns the data of the page as a string """ - return self._download_webpage_handle(url_or_request, video_id, note, errnote)[0] + res = self._download_webpage_handle(url_or_request, video_id, note, errnote, fatal) + if res is False: + return res + else: + content, _ = res + return content + + def _download_xml(self, url_or_request, video_id, + note=u'Downloading XML', errnote=u'Unable to download XML', + transform_source=None): + """Return the xml as an xml.etree.ElementTree.Element""" + xml_string = self._download_webpage(url_or_request, video_id, note, errnote) + if transform_source: + xml_string = transform_source(xml_string) + return xml.etree.ElementTree.fromstring(xml_string.encode('utf-8')) + + def _download_json(self, url_or_request, video_id, + note=u'Downloading JSON metadata', + errnote=u'Unable to download JSON metadata', + transform_source=None): + json_string = self._download_webpage(url_or_request, video_id, note, errnote) + if transform_source: + json_string = transform_source(json_string) + try: + return json.loads(json_string) + except ValueError as ve: + raise ExtractorError('Failed to download JSON', cause=ve) + + def report_warning(self, msg, video_id=None): + idstr = u'' if video_id is None else u'%s: ' % video_id + self._downloader.report_warning( + u'[%s] %s%s' % (self.IE_NAME, idstr, msg)) def to_screen(self, msg): """Print msg to screen, prefixing it with '[ie_name]'""" @@ -169,19 +307,18 @@ class InfoExtractor(object): self.to_screen(u'Logging in') #Methods for following #608 - #They set the correct value of the '_type' key - def video_result(self, video_info): - """Returns a video""" - video_info['_type'] = 'video' - return video_info - def url_result(self, url, ie=None): + @staticmethod + def url_result(url, ie=None, video_id=None): """Returns a url that points to a page that should be processed""" #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 return video_info - def playlist_result(self, entries, playlist_id=None, playlist_title=None): + @staticmethod + def playlist_result(entries, playlist_id=None, playlist_title=None): """Returns a playlist""" video_info = {'_type': 'playlist', 'entries': entries} @@ -191,12 +328,12 @@ class InfoExtractor(object): video_info['title'] = playlist_title return video_info - def _search_regex(self, pattern, string, name, default=None, fatal=True, flags=0): + def _search_regex(self, pattern, string, name, default=_NO_DEFAULT, fatal=True, flags=0): """ Perform a regex search on the given string, using a single or a list of patterns returning the first matching group. In case of failure return a default value or raise a WARNING or a - ExtractorError, depending on fatal, specifying the field name. + RegexNotFoundError, depending on fatal, specifying the field name. """ if isinstance(pattern, (str, compat_str, compiled_regex_type)): mobj = re.search(pattern, string, flags) @@ -205,7 +342,7 @@ class InfoExtractor(object): mobj = re.search(p, string, flags) if mobj: break - if sys.stderr.isatty() and os.name != 'nt': + if os.name != 'nt' and sys.stderr.isatty(): _name = u'\033[0;34m%s\033[0m' % name else: _name = name @@ -213,16 +350,16 @@ class InfoExtractor(object): if mobj: # return the first matching group return next(g for g in mobj.groups() if g is not None) - elif default is not None: + elif default is not _NO_DEFAULT: return default elif fatal: - raise ExtractorError(u'Unable to extract %s' % _name) + raise RegexNotFoundError(u'Unable to extract %s' % _name) else: self._downloader.report_warning(u'unable to extract %s; ' u'please report this issue on http://yt-dl.org/bug' % _name) return None - def _html_search_regex(self, pattern, string, name, default=None, fatal=True, flags=0): + def _html_search_regex(self, pattern, string, name, default=_NO_DEFAULT, fatal=True, flags=0): """ Like _search_regex, but strips HTML tags and unescapes entities. """ @@ -262,6 +399,136 @@ class InfoExtractor(object): return (username, password) + # Helper functions for extracting OpenGraph info + @staticmethod + def _og_regexes(prop): + content_re = r'content=(?:"([^>]+?)"|\'([^>]+?)\')' + property_re = r'(?:name|property)=[\'"]og:%s[\'"]' % re.escape(prop) + template = r']+?%s[^>]+?%s' + return [ + template % (property_re, content_re), + template % (content_re, property_re), + ] + + def _og_search_property(self, prop, html, name=None, **kargs): + if name is None: + name = 'OpenGraph %s' % prop + escaped = self._search_regex(self._og_regexes(prop), html, name, flags=re.DOTALL, **kargs) + if escaped is None: + return None + return unescapeHTML(escaped) + + def _og_search_thumbnail(self, html, **kargs): + return self._og_search_property('image', html, u'thumbnail url', fatal=False, **kargs) + + def _og_search_description(self, html, **kargs): + return self._og_search_property('description', html, fatal=False, **kargs) + + def _og_search_title(self, html, **kargs): + return self._og_search_property('title', html, **kargs) + + def _og_search_video_url(self, html, name='video url', secure=True, **kargs): + regexes = self._og_regexes('video') + if secure: regexes = self._og_regexes('video:secure_url') + regexes + return self._html_search_regex(regexes, html, name, **kargs) + + def _html_search_meta(self, name, html, display_name=None): + if display_name is None: + display_name = name + return self._html_search_regex( + r'''(?ix)]+(?:itemprop|name|property)=["\']%s["\']) + [^>]+content=["\']([^"\']+)["\']''' % re.escape(name), + html, display_name, fatal=False) + + def _dc_search_uploader(self, html): + return self._html_search_meta('dc.creator', html, 'uploader') + + def _rta_search(self, html): + # See http://www.rtalabel.org/index.php?content=howtofaq#single + if re.search(r'(?ix)