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Add Jukebox IE
[youtube-dl.git] / youtube_dl / extractor / youtube.py
1 # coding: utf-8
2
3 import json
4 import netrc
5 import re
6 import socket
7
8 from .common import InfoExtractor, SearchInfoExtractor
9 from ..utils import (
10     compat_http_client,
11     compat_parse_qs,
12     compat_urllib_error,
13     compat_urllib_parse,
14     compat_urllib_request,
15     compat_str,
16
17     clean_html,
18     get_element_by_id,
19     ExtractorError,
20     unescapeHTML,
21     unified_strdate,
22 )
23
24
25 class YoutubeIE(InfoExtractor):
26     """Information extractor for youtube.com."""
27
28     _VALID_URL = r"""^
29                      (
30                          (?:https?://)?                                       # http(s):// (optional)
31                          (?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/|
32                             tube\.majestyc\.net/)                             # the various hostnames, with wildcard subdomains
33                          (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
34                          (?:                                                  # the various things that can precede the ID:
35                              (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
36                              |(?:                                             # or the v= param in all its forms
37                                  (?:watch(?:_popup)?(?:\.php)?)?              # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
38                                  (?:\?|\#!?)                                  # the params delimiter ? or # or #!
39                                  (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
40                                  v=
41                              )
42                          )?                                                   # optional -> youtube.com/xxxx is OK
43                      )?                                                       # all until now is optional -> you can pass the naked ID
44                      ([0-9A-Za-z_-]+)                                         # here is it! the YouTube video ID
45                      (?(1).+)?                                                # if we found the ID, everything can follow
46                      $"""
47     _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
48     _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
49     _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
50     _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
51     _NETRC_MACHINE = 'youtube'
52     # Listed in order of quality
53     _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
54     _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13']
55     _video_extensions = {
56         '13': '3gp',
57         '17': 'mp4',
58         '18': 'mp4',
59         '22': 'mp4',
60         '37': 'mp4',
61         '38': 'mp4',
62         '43': 'webm',
63         '44': 'webm',
64         '45': 'webm',
65         '46': 'webm',
66     }
67     _video_dimensions = {
68         '5': '240x400',
69         '6': '???',
70         '13': '???',
71         '17': '144x176',
72         '18': '360x640',
73         '22': '720x1280',
74         '34': '360x640',
75         '35': '480x854',
76         '37': '1080x1920',
77         '38': '3072x4096',
78         '43': '360x640',
79         '44': '480x854',
80         '45': '720x1280',
81         '46': '1080x1920',
82     }
83     IE_NAME = u'youtube'
84
85     @classmethod
86     def suitable(cls, url):
87         """Receives a URL and returns True if suitable for this IE."""
88         if YoutubePlaylistIE.suitable(url): return False
89         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
90
91     def report_lang(self):
92         """Report attempt to set language."""
93         self.to_screen(u'Setting language')
94
95     def report_login(self):
96         """Report attempt to log in."""
97         self.to_screen(u'Logging in')
98
99     def report_video_webpage_download(self, video_id):
100         """Report attempt to download video webpage."""
101         self.to_screen(u'%s: Downloading video webpage' % video_id)
102
103     def report_video_info_webpage_download(self, video_id):
104         """Report attempt to download video info webpage."""
105         self.to_screen(u'%s: Downloading video info webpage' % video_id)
106
107     def report_video_subtitles_download(self, video_id):
108         """Report attempt to download video info webpage."""
109         self.to_screen(u'%s: Checking available subtitles' % video_id)
110
111     def report_video_subtitles_request(self, video_id, sub_lang, format):
112         """Report attempt to download video info webpage."""
113         self.to_screen(u'%s: Downloading video subtitles for %s.%s' % (video_id, sub_lang, format))
114
115     def report_video_subtitles_available(self, video_id, sub_lang_list):
116         """Report available subtitles."""
117         sub_lang = ",".join(list(sub_lang_list.keys()))
118         self.to_screen(u'%s: Available subtitles for video: %s' % (video_id, sub_lang))
119
120     def report_information_extraction(self, video_id):
121         """Report attempt to extract video information."""
122         self.to_screen(u'%s: Extracting video information' % video_id)
123
124     def report_unavailable_format(self, video_id, format):
125         """Report extracted video URL."""
126         self.to_screen(u'%s: Format %s not available' % (video_id, format))
127
128     def report_rtmp_download(self):
129         """Indicate the download will use the RTMP protocol."""
130         self.to_screen(u'RTMP download detected')
131
132     def _decrypt_signature(self, s):
133         """Decrypt the key the two subkeys must have a length of 43"""
134         (a,b) = s.split('.')
135         if len(a) != 43 or len(b) != 43:
136             raise ExtractorError(u'Unable to decrypt signature, subkeys lengths %d.%d not supported; retrying might work' % (len(a), len(b)))
137         if self._downloader.params.get('verbose'):
138             self.to_screen('encrypted signature length %d.%d' % (len(a), len(b)))
139         b = ''.join([b[:8],a[0],b[9:18],b[-4],b[19:39], b[18]])[0:40]
140         a = a[-40:]
141         s_dec = '.'.join((a,b))[::-1]
142         return s_dec
143
144     def _get_available_subtitles(self, video_id):
145         self.report_video_subtitles_download(video_id)
146         request = compat_urllib_request.Request('http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id)
147         try:
148             sub_list = compat_urllib_request.urlopen(request).read().decode('utf-8')
149         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
150             return (u'unable to download video subtitles: %s' % compat_str(err), None)
151         sub_lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
152         sub_lang_list = dict((l[1], l[0]) for l in sub_lang_list)
153         if not sub_lang_list:
154             return (u'video doesn\'t have subtitles', None)
155         return sub_lang_list
156
157     def _list_available_subtitles(self, video_id):
158         sub_lang_list = self._get_available_subtitles(video_id)
159         self.report_video_subtitles_available(video_id, sub_lang_list)
160
161     def _request_subtitle(self, sub_lang, sub_name, video_id, format):
162         """
163         Return tuple:
164         (error_message, sub_lang, sub)
165         """
166         self.report_video_subtitles_request(video_id, sub_lang, format)
167         params = compat_urllib_parse.urlencode({
168             'lang': sub_lang,
169             'name': sub_name,
170             'v': video_id,
171             'fmt': format,
172         })
173         url = 'http://www.youtube.com/api/timedtext?' + params
174         try:
175             sub = compat_urllib_request.urlopen(url).read().decode('utf-8')
176         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
177             return (u'unable to download video subtitles: %s' % compat_str(err), None, None)
178         if not sub:
179             return (u'Did not fetch video subtitles', None, None)
180         return (None, sub_lang, sub)
181
182     def _request_automatic_caption(self, video_id, webpage):
183         """We need the webpage for getting the captions url, pass it as an
184            argument to speed up the process."""
185         sub_lang = self._downloader.params.get('subtitleslang') or 'en'
186         sub_format = self._downloader.params.get('subtitlesformat')
187         self.to_screen(u'%s: Looking for automatic captions' % video_id)
188         mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
189         err_msg = u'Couldn\'t find automatic captions for "%s"' % sub_lang
190         if mobj is None:
191             return [(err_msg, None, None)]
192         player_config = json.loads(mobj.group(1))
193         try:
194             args = player_config[u'args']
195             caption_url = args[u'ttsurl']
196             timestamp = args[u'timestamp']
197             params = compat_urllib_parse.urlencode({
198                 'lang': 'en',
199                 'tlang': sub_lang,
200                 'fmt': sub_format,
201                 'ts': timestamp,
202                 'kind': 'asr',
203             })
204             subtitles_url = caption_url + '&' + params
205             sub = self._download_webpage(subtitles_url, video_id, u'Downloading automatic captions')
206             return [(None, sub_lang, sub)]
207         except KeyError:
208             return [(err_msg, None, None)]
209
210     def _extract_subtitle(self, video_id):
211         """
212         Return a list with a tuple:
213         [(error_message, sub_lang, sub)]
214         """
215         sub_lang_list = self._get_available_subtitles(video_id)
216         sub_format = self._downloader.params.get('subtitlesformat')
217         if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
218             return [(sub_lang_list[0], None, None)]
219         if self._downloader.params.get('subtitleslang', False):
220             sub_lang = self._downloader.params.get('subtitleslang')
221         elif 'en' in sub_lang_list:
222             sub_lang = 'en'
223         else:
224             sub_lang = list(sub_lang_list.keys())[0]
225         if not sub_lang in sub_lang_list:
226             return [(u'no closed captions found in the specified language "%s"' % sub_lang, None, None)]
227
228         subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
229         return [subtitle]
230
231     def _extract_all_subtitles(self, video_id):
232         sub_lang_list = self._get_available_subtitles(video_id)
233         sub_format = self._downloader.params.get('subtitlesformat')
234         if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
235             return [(sub_lang_list[0], None, None)]
236         subtitles = []
237         for sub_lang in sub_lang_list:
238             subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
239             subtitles.append(subtitle)
240         return subtitles
241
242     def _print_formats(self, formats):
243         print('Available formats:')
244         for x in formats:
245             print('%s\t:\t%s\t[%s]' %(x, self._video_extensions.get(x, 'flv'), self._video_dimensions.get(x, '???')))
246
247     def _real_initialize(self):
248         if self._downloader is None:
249             return
250
251         username = None
252         password = None
253         downloader_params = self._downloader.params
254
255         # Attempt to use provided username and password or .netrc data
256         if downloader_params.get('username', None) is not None:
257             username = downloader_params['username']
258             password = downloader_params['password']
259         elif downloader_params.get('usenetrc', False):
260             try:
261                 info = netrc.netrc().authenticators(self._NETRC_MACHINE)
262                 if info is not None:
263                     username = info[0]
264                     password = info[2]
265                 else:
266                     raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
267             except (IOError, netrc.NetrcParseError) as err:
268                 self._downloader.report_warning(u'parsing .netrc: %s' % compat_str(err))
269                 return
270
271         # Set language
272         request = compat_urllib_request.Request(self._LANG_URL)
273         try:
274             self.report_lang()
275             compat_urllib_request.urlopen(request).read()
276         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
277             self._downloader.report_warning(u'unable to set language: %s' % compat_str(err))
278             return
279
280         # No authentication to be performed
281         if username is None:
282             return
283
284         request = compat_urllib_request.Request(self._LOGIN_URL)
285         try:
286             login_page = compat_urllib_request.urlopen(request).read().decode('utf-8')
287         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
288             self._downloader.report_warning(u'unable to fetch login page: %s' % compat_str(err))
289             return
290
291         galx = None
292         dsh = None
293         match = re.search(re.compile(r'<input.+?name="GALX".+?value="(.+?)"', re.DOTALL), login_page)
294         if match:
295           galx = match.group(1)
296
297         match = re.search(re.compile(r'<input.+?name="dsh".+?value="(.+?)"', re.DOTALL), login_page)
298         if match:
299           dsh = match.group(1)
300
301         # Log in
302         login_form_strs = {
303                 u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',
304                 u'Email': username,
305                 u'GALX': galx,
306                 u'Passwd': password,
307                 u'PersistentCookie': u'yes',
308                 u'_utf8': u'霱',
309                 u'bgresponse': u'js_disabled',
310                 u'checkConnection': u'',
311                 u'checkedDomains': u'youtube',
312                 u'dnConn': u'',
313                 u'dsh': dsh,
314                 u'pstMsg': u'0',
315                 u'rmShown': u'1',
316                 u'secTok': u'',
317                 u'signIn': u'Sign in',
318                 u'timeStmp': u'',
319                 u'service': u'youtube',
320                 u'uilel': u'3',
321                 u'hl': u'en_US',
322         }
323         # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode
324         # chokes on unicode
325         login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())
326         login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
327         request = compat_urllib_request.Request(self._LOGIN_URL, login_data)
328         try:
329             self.report_login()
330             login_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
331             if re.search(r'(?i)<form[^>]* id="gaia_loginform"', login_results) is not None:
332                 self._downloader.report_warning(u'unable to log in: bad username or password')
333                 return
334         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
335             self._downloader.report_warning(u'unable to log in: %s' % compat_str(err))
336             return
337
338         # Confirm age
339         age_form = {
340                 'next_url':     '/',
341                 'action_confirm':   'Confirm',
342                 }
343         request = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
344         try:
345             self.report_age_confirmation()
346             compat_urllib_request.urlopen(request).read().decode('utf-8')
347         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
348             raise ExtractorError(u'Unable to confirm age: %s' % compat_str(err))
349
350     def _extract_id(self, url):
351         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
352         if mobj is None:
353             raise ExtractorError(u'Invalid URL: %s' % url)
354         video_id = mobj.group(2)
355         return video_id
356
357     def _real_extract(self, url):
358         # Extract original video URL from URL with redirection, like age verification, using next_url parameter
359         mobj = re.search(self._NEXT_URL_RE, url)
360         if mobj:
361             url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
362         video_id = self._extract_id(url)
363
364         # Get video webpage
365         self.report_video_webpage_download(video_id)
366         url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
367         request = compat_urllib_request.Request(url)
368         try:
369             video_webpage_bytes = compat_urllib_request.urlopen(request).read()
370         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
371             raise ExtractorError(u'Unable to download video webpage: %s' % compat_str(err))
372
373         video_webpage = video_webpage_bytes.decode('utf-8', 'ignore')
374
375         # Attempt to extract SWF player URL
376         mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
377         if mobj is not None:
378             player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
379         else:
380             player_url = None
381
382         # Get video info
383         self.report_video_info_webpage_download(video_id)
384         for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
385             video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
386                     % (video_id, el_type))
387             video_info_webpage = self._download_webpage(video_info_url, video_id,
388                                     note=False,
389                                     errnote='unable to download video info webpage')
390             video_info = compat_parse_qs(video_info_webpage)
391             if 'token' in video_info:
392                 break
393         if 'token' not in video_info:
394             if 'reason' in video_info:
395                 raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0])
396             else:
397                 raise ExtractorError(u'"token" parameter not in video info for unknown reason')
398
399         # Check for "rental" videos
400         if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
401             raise ExtractorError(u'"rental" videos not supported')
402
403         # Start extracting information
404         self.report_information_extraction(video_id)
405
406         # uploader
407         if 'author' not in video_info:
408             raise ExtractorError(u'Unable to extract uploader name')
409         video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
410
411         # uploader_id
412         video_uploader_id = None
413         mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)
414         if mobj is not None:
415             video_uploader_id = mobj.group(1)
416         else:
417             self._downloader.report_warning(u'unable to extract uploader nickname')
418
419         # title
420         if 'title' not in video_info:
421             raise ExtractorError(u'Unable to extract video title')
422         video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
423
424         # thumbnail image
425         if 'thumbnail_url' not in video_info:
426             self._downloader.report_warning(u'unable to extract video thumbnail')
427             video_thumbnail = ''
428         else:   # don't panic if we can't find it
429             video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
430
431         # upload date
432         upload_date = None
433         mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
434         if mobj is not None:
435             upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
436             upload_date = unified_strdate(upload_date)
437
438         # description
439         video_description = get_element_by_id("eow-description", video_webpage)
440         if video_description:
441             video_description = clean_html(video_description)
442         else:
443             fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)
444             if fd_mobj:
445                 video_description = unescapeHTML(fd_mobj.group(1))
446             else:
447                 video_description = u''
448
449         # subtitles
450         video_subtitles = None
451
452         if self._downloader.params.get('writesubtitles', False):
453             video_subtitles = self._extract_subtitle(video_id)
454             if video_subtitles:
455                 (sub_error, sub_lang, sub) = video_subtitles[0]
456                 if sub_error:
457                     # We try with the automatic captions
458                     video_subtitles = self._request_automatic_caption(video_id, video_webpage)
459                     (sub_error_auto, sub_lang, sub) = video_subtitles[0]
460                     if sub is not None:
461                         pass
462                     else:
463                         # We report the original error
464                         self._downloader.report_warning(sub_error)
465
466         if self._downloader.params.get('allsubtitles', False):
467             video_subtitles = self._extract_all_subtitles(video_id)
468             for video_subtitle in video_subtitles:
469                 (sub_error, sub_lang, sub) = video_subtitle
470                 if sub_error:
471                     self._downloader.report_warning(sub_error)
472
473         if self._downloader.params.get('listsubtitles', False):
474             self._list_available_subtitles(video_id)
475             return
476
477         if 'length_seconds' not in video_info:
478             self._downloader.report_warning(u'unable to extract video duration')
479             video_duration = ''
480         else:
481             video_duration = compat_urllib_parse.unquote_plus(video_info['length_seconds'][0])
482
483         # Decide which formats to download
484         req_format = self._downloader.params.get('format', None)
485
486         try:
487             mobj = re.search(r';ytplayer.config = ({.*?});', video_webpage)
488             if not mobj:
489                 raise ValueError('Could not find vevo ID')
490             info = json.loads(mobj.group(1))
491             args = info['args']
492             # Easy way to know if the 's' value is in url_encoded_fmt_stream_map
493             # this signatures are encrypted
494             m_s = re.search(r'[&,]s=', args['url_encoded_fmt_stream_map'])
495             if m_s is not None:
496                 self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
497                 video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
498         except ValueError:
499             pass
500
501         if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
502             self.report_rtmp_download()
503             video_url_list = [(None, video_info['conn'][0])]
504         elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
505             url_map = {}
506             for url_data_str in video_info['url_encoded_fmt_stream_map'][0].split(','):
507                 url_data = compat_parse_qs(url_data_str)
508                 if 'itag' in url_data and 'url' in url_data:
509                     url = url_data['url'][0]
510                     if 'sig' in url_data:
511                         url += '&signature=' + url_data['sig'][0]
512                     elif 's' in url_data:
513                         signature = self._decrypt_signature(url_data['s'][0])
514                         url += '&signature=' + signature
515                     if 'ratebypass' not in url:
516                         url += '&ratebypass=yes'
517                     url_map[url_data['itag'][0]] = url
518
519             format_limit = self._downloader.params.get('format_limit', None)
520             available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats
521             if format_limit is not None and format_limit in available_formats:
522                 format_list = available_formats[available_formats.index(format_limit):]
523             else:
524                 format_list = available_formats
525             existing_formats = [x for x in format_list if x in url_map]
526             if len(existing_formats) == 0:
527                 raise ExtractorError(u'no known formats available for video')
528             if self._downloader.params.get('listformats', None):
529                 self._print_formats(existing_formats)
530                 return
531             if req_format is None or req_format == 'best':
532                 video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
533             elif req_format == 'worst':
534                 video_url_list = [(existing_formats[len(existing_formats)-1], url_map[existing_formats[len(existing_formats)-1]])] # worst quality
535             elif req_format in ('-1', 'all'):
536                 video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
537             else:
538                 # Specific formats. We pick the first in a slash-delimeted sequence.
539                 # For example, if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
540                 req_formats = req_format.split('/')
541                 video_url_list = None
542                 for rf in req_formats:
543                     if rf in url_map:
544                         video_url_list = [(rf, url_map[rf])]
545                         break
546                 if video_url_list is None:
547                     raise ExtractorError(u'requested format not available')
548         else:
549             raise ExtractorError(u'no conn or url_encoded_fmt_stream_map information found in video info')
550
551         results = []
552         for format_param, video_real_url in video_url_list:
553             # Extension
554             video_extension = self._video_extensions.get(format_param, 'flv')
555
556             video_format = '{0} - {1}'.format(format_param if format_param else video_extension,
557                                               self._video_dimensions.get(format_param, '???'))
558
559             results.append({
560                 'id':       video_id,
561                 'url':      video_real_url,
562                 'uploader': video_uploader,
563                 'uploader_id': video_uploader_id,
564                 'upload_date':  upload_date,
565                 'title':    video_title,
566                 'ext':      video_extension,
567                 'format':   video_format,
568                 'thumbnail':    video_thumbnail,
569                 'description':  video_description,
570                 'player_url':   player_url,
571                 'subtitles':    video_subtitles,
572                 'duration':     video_duration
573             })
574         return results
575
576 class YoutubePlaylistIE(InfoExtractor):
577     """Information Extractor for YouTube playlists."""
578
579     _VALID_URL = r"""(?:
580                         (?:https?://)?
581                         (?:\w+\.)?
582                         youtube\.com/
583                         (?:
584                            (?:course|view_play_list|my_playlists|artist|playlist|watch)
585                            \? (?:.*?&)*? (?:p|a|list)=
586                         |  p/
587                         )
588                         ((?:PL|EC|UU)?[0-9A-Za-z-_]{10,})
589                         .*
590                      |
591                         ((?:PL|EC|UU)[0-9A-Za-z-_]{10,})
592                      )"""
593     _TEMPLATE_URL = 'https://gdata.youtube.com/feeds/api/playlists/%s?max-results=%i&start-index=%i&v=2&alt=json&safeSearch=none'
594     _MAX_RESULTS = 50
595     IE_NAME = u'youtube:playlist'
596
597     @classmethod
598     def suitable(cls, url):
599         """Receives a URL and returns True if suitable for this IE."""
600         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
601
602     def _real_extract(self, url):
603         # Extract playlist id
604         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
605         if mobj is None:
606             raise ExtractorError(u'Invalid URL: %s' % url)
607
608         # Download playlist videos from API
609         playlist_id = mobj.group(1) or mobj.group(2)
610         page_num = 1
611         videos = []
612
613         while True:
614             url = self._TEMPLATE_URL % (playlist_id, self._MAX_RESULTS, self._MAX_RESULTS * (page_num - 1) + 1)
615             page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)
616
617             try:
618                 response = json.loads(page)
619             except ValueError as err:
620                 raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
621
622             if 'feed' not in response:
623                 raise ExtractorError(u'Got a malformed response from YouTube API')
624             playlist_title = response['feed']['title']['$t']
625             if 'entry' not in response['feed']:
626                 # Number of videos is a multiple of self._MAX_RESULTS
627                 break
628
629             for entry in response['feed']['entry']:
630                 index = entry['yt$position']['$t']
631                 if 'media$group' in entry and 'media$player' in entry['media$group']:
632                     videos.append((index, entry['media$group']['media$player']['url']))
633
634             if len(response['feed']['entry']) < self._MAX_RESULTS:
635                 break
636             page_num += 1
637
638         videos = [v[1] for v in sorted(videos)]
639
640         url_results = [self.url_result(url, 'Youtube') for url in videos]
641         return [self.playlist_result(url_results, playlist_id, playlist_title)]
642
643
644 class YoutubeChannelIE(InfoExtractor):
645     """Information Extractor for YouTube channels."""
646
647     _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)"
648     _TEMPLATE_URL = 'http://www.youtube.com/channel/%s/videos?sort=da&flow=list&view=0&page=%s&gl=US&hl=en'
649     _MORE_PAGES_INDICATOR = 'yt-uix-load-more'
650     _MORE_PAGES_URL = 'http://www.youtube.com/channel_ajax?action_load_more_videos=1&flow=list&paging=%s&view=0&sort=da&channel_id=%s'
651     IE_NAME = u'youtube:channel'
652
653     def extract_videos_from_page(self, page):
654         ids_in_page = []
655         for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):
656             if mobj.group(1) not in ids_in_page:
657                 ids_in_page.append(mobj.group(1))
658         return ids_in_page
659
660     def _real_extract(self, url):
661         # Extract channel id
662         mobj = re.match(self._VALID_URL, url)
663         if mobj is None:
664             raise ExtractorError(u'Invalid URL: %s' % url)
665
666         # Download channel page
667         channel_id = mobj.group(1)
668         video_ids = []
669         pagenum = 1
670
671         url = self._TEMPLATE_URL % (channel_id, pagenum)
672         page = self._download_webpage(url, channel_id,
673                                       u'Downloading page #%s' % pagenum)
674
675         # Extract video identifiers
676         ids_in_page = self.extract_videos_from_page(page)
677         video_ids.extend(ids_in_page)
678
679         # Download any subsequent channel pages using the json-based channel_ajax query
680         if self._MORE_PAGES_INDICATOR in page:
681             while True:
682                 pagenum = pagenum + 1
683
684                 url = self._MORE_PAGES_URL % (pagenum, channel_id)
685                 page = self._download_webpage(url, channel_id,
686                                               u'Downloading page #%s' % pagenum)
687
688                 page = json.loads(page)
689
690                 ids_in_page = self.extract_videos_from_page(page['content_html'])
691                 video_ids.extend(ids_in_page)
692
693                 if self._MORE_PAGES_INDICATOR  not in page['load_more_widget_html']:
694                     break
695
696         self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
697
698         urls = ['http://www.youtube.com/watch?v=%s' % id for id in video_ids]
699         url_entries = [self.url_result(url, 'Youtube') for url in urls]
700         return [self.playlist_result(url_entries, channel_id)]
701
702
703 class YoutubeUserIE(InfoExtractor):
704     """Information Extractor for YouTube users."""
705
706     _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/user/)|ytuser:)([A-Za-z0-9_-]+)'
707     _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
708     _GDATA_PAGE_SIZE = 50
709     _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d'
710     _VIDEO_INDICATOR = r'/watch\?v=(.+?)[\<&]'
711     IE_NAME = u'youtube:user'
712
713     def _real_extract(self, url):
714         # Extract username
715         mobj = re.match(self._VALID_URL, url)
716         if mobj is None:
717             raise ExtractorError(u'Invalid URL: %s' % url)
718
719         username = mobj.group(1)
720
721         # Download video ids using YouTube Data API. Result size per
722         # query is limited (currently to 50 videos) so we need to query
723         # page by page until there are no video ids - it means we got
724         # all of them.
725
726         video_ids = []
727         pagenum = 0
728
729         while True:
730             start_index = pagenum * self._GDATA_PAGE_SIZE + 1
731
732             gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)
733             page = self._download_webpage(gdata_url, username,
734                                           u'Downloading video ids from %d to %d' % (start_index, start_index + self._GDATA_PAGE_SIZE))
735
736             # Extract video identifiers
737             ids_in_page = []
738
739             for mobj in re.finditer(self._VIDEO_INDICATOR, page):
740                 if mobj.group(1) not in ids_in_page:
741                     ids_in_page.append(mobj.group(1))
742
743             video_ids.extend(ids_in_page)
744
745             # A little optimization - if current page is not
746             # "full", ie. does not contain PAGE_SIZE video ids then
747             # we can assume that this page is the last one - there
748             # are no more ids on further pages - no need to query
749             # again.
750
751             if len(ids_in_page) < self._GDATA_PAGE_SIZE:
752                 break
753
754             pagenum += 1
755
756         urls = ['http://www.youtube.com/watch?v=%s' % video_id for video_id in video_ids]
757         url_results = [self.url_result(url, 'Youtube') for url in urls]
758         return [self.playlist_result(url_results, playlist_title = username)]
759
760 class YoutubeSearchIE(SearchInfoExtractor):
761     """Information Extractor for YouTube search queries."""
762     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
763     _MAX_RESULTS = 1000
764     IE_NAME = u'youtube:search'
765     _SEARCH_KEY = 'ytsearch'
766
767     def report_download_page(self, query, pagenum):
768         """Report attempt to download search page with given number."""
769         self._downloader.to_screen(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))
770
771     def _get_n_results(self, query, n):
772         """Get a specified number of results for a query"""
773
774         video_ids = []
775         pagenum = 0
776         limit = n
777
778         while (50 * pagenum) < limit:
779             self.report_download_page(query, pagenum+1)
780             result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)
781             request = compat_urllib_request.Request(result_url)
782             try:
783                 data = compat_urllib_request.urlopen(request).read().decode('utf-8')
784             except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
785                 raise ExtractorError(u'Unable to download API page: %s' % compat_str(err))
786             api_response = json.loads(data)['data']
787
788             if not 'items' in api_response:
789                 raise ExtractorError(u'[youtube] No video results')
790
791             new_ids = list(video['id'] for video in api_response['items'])
792             video_ids += new_ids
793
794             limit = min(n, api_response['totalItems'])
795             pagenum += 1
796
797         if len(video_ids) > n:
798             video_ids = video_ids[:n]
799         videos = [self.url_result('http://www.youtube.com/watch?v=%s' % id, 'Youtube') for id in video_ids]
800         return self.playlist_result(videos, query)