_ Git - youtube-dl/blob - youtube_dl/extractor/soundcloud.py

   1 # coding: utf-8
   2 from __future__ import unicode_literals
   3
   4 import itertools
   5 import re
   6
   7 from .common import (
   8     InfoExtractor,
   9     SearchInfoExtractor
  10 )
  11 from ..compat import (
  12     compat_str,
  13     compat_urlparse,
  14     compat_urllib_parse_urlencode,
  15 )
  16 from ..utils import (
  17     ExtractorError,
  18     int_or_none,
  19     unified_strdate,
  20     update_url_query,
  21 )
  22
  23
  24 class SoundcloudIE(InfoExtractor):
  25     """Information extractor for soundcloud.com
  26        To access the media, the uid of the song and a stream token
  27        must be extracted from the page source and the script must make
  28        a request to media.soundcloud.com/crossdomain.xml. Then
  29        the media can be grabbed by requesting from an url composed
  30        of the stream token and uid
  31      """
  32
  33     _VALID_URL = r'''(?x)^(?:https?://)?
  34                     (?:(?:(?:www\.|m\.)?soundcloud\.com/
  35                             (?!stations/track)
  36                             (?P<uploader>[\w\d-]+)/
  37                             (?!(?:tracks|sets(?:/.+?)?|reposts|likes|spotlight)/?(?:$|[?#]))
  38                             (?P<title>[\w\d-]+)/?
  39                             (?P<token>[^?]+?)?(?:[?].*)?$)
  40                        |(?:api\.soundcloud\.com/tracks/(?P<track_id>\d+)
  41                           (?:/?\?secret_token=(?P<secret_token>[^&]+))?)
  42                        |(?P<player>(?:w|player|p.)\.soundcloud\.com/player/?.*?url=.*)
  43                     )
  44                     '''
  45     IE_NAME = 'soundcloud'
  46     _TESTS = [
  47         {
  48             'url': 'http://soundcloud.com/ethmusic/lostin-powers-she-so-heavy',
  49             'md5': 'ebef0a451b909710ed1d7787dddbf0d7',
  50             'info_dict': {
  51                 'id': '62986583',
  52                 'ext': 'mp3',
  53                 'upload_date': '20121011',
  54                 'description': 'No Downloads untill we record the finished version this weekend, i was too pumped n i had to post it , earl is prolly gonna b hella p.o\'d',
  55                 'uploader': 'E.T. ExTerrestrial Music',
  56                 'title': 'Lostin Powers - She so Heavy (SneakPreview) Adrian Ackers Blueprint 1',
  57                 'duration': 143,
  58                 'license': 'all-rights-reserved',
  59             }
  60         },
  61         # not streamable song
  62         {
  63             'url': 'https://soundcloud.com/the-concept-band/goldrushed-mastered?in=the-concept-band/sets/the-royal-concept-ep',
  64             'info_dict': {
  65                 'id': '47127627',
  66                 'ext': 'mp3',
  67                 'title': 'Goldrushed',
  68                 'description': 'From Stockholm Sweden\r\nPovel / Magnus / Filip / David\r\nwww.theroyalconcept.com',
  69                 'uploader': 'The Royal Concept',
  70                 'upload_date': '20120521',
  71                 'duration': 227,
  72                 'license': 'all-rights-reserved',
  73             },
  74             'params': {
  75                 # rtmp
  76                 'skip_download': True,
  77             },
  78         },
  79         # private link
  80         {
  81             'url': 'https://soundcloud.com/jaimemf/youtube-dl-test-video-a-y-baw/s-8Pjrp',
  82             'md5': 'aa0dd32bfea9b0c5ef4f02aacd080604',
  83             'info_dict': {
  84                 'id': '123998367',
  85                 'ext': 'mp3',
  86                 'title': 'Youtube - Dl Test Video \'\' Ä↭',
  87                 'uploader': 'jaimeMF',
  88                 'description': 'test chars:  \"\'/\\ä↭',
  89                 'upload_date': '20131209',
  90                 'duration': 9,
  91                 'license': 'all-rights-reserved',
  92             },
  93         },
  94         # private link (alt format)
  95         {
  96             'url': 'https://api.soundcloud.com/tracks/123998367?secret_token=s-8Pjrp',
  97             'md5': 'aa0dd32bfea9b0c5ef4f02aacd080604',
  98             'info_dict': {
  99                 'id': '123998367',
 100                 'ext': 'mp3',
 101                 'title': 'Youtube - Dl Test Video \'\' Ä↭',
 102                 'uploader': 'jaimeMF',
 103                 'description': 'test chars:  \"\'/\\ä↭',
 104                 'upload_date': '20131209',
 105                 'duration': 9,
 106                 'license': 'all-rights-reserved',
 107             },
 108         },
 109         # downloadable song
 110         {
 111             'url': 'https://soundcloud.com/oddsamples/bus-brakes',
 112             'md5': '7624f2351f8a3b2e7cd51522496e7631',
 113             'info_dict': {
 114                 'id': '128590877',
 115                 'ext': 'mp3',
 116                 'title': 'Bus Brakes',
 117                 'description': 'md5:0053ca6396e8d2fd7b7e1595ef12ab66',
 118                 'uploader': 'oddsamples',
 119                 'upload_date': '20140109',
 120                 'duration': 17,
 121                 'license': 'cc-by-sa',
 122             },
 123         },
 124         # private link, downloadable format
 125         {
 126             'url': 'https://soundcloud.com/oriuplift/uponly-238-no-talking-wav/s-AyZUd',
 127             'md5': '64a60b16e617d41d0bef032b7f55441e',
 128             'info_dict': {
 129                 'id': '340344461',
 130                 'ext': 'wav',
 131                 'title': 'Uplifting Only 238 [No Talking] (incl. Alex Feed Guestmix) (Aug 31, 2017) [wav]',
 132                 'description': 'md5:fa20ee0fca76a3d6df8c7e57f3715366',
 133                 'uploader': 'Ori Uplift Music',
 134                 'upload_date': '20170831',
 135                 'duration': 7449,
 136                 'license': 'all-rights-reserved',
 137             },
 138         },
 139         # no album art, use avatar pic for thumbnail
 140         {
 141             'url': 'https://soundcloud.com/garyvee/sideways-prod-mad-real',
 142             'md5': '59c7872bc44e5d99b7211891664760c2',
 143             'info_dict': {
 144                 'id': '309699954',
 145                 'ext': 'mp3',
 146                 'title': 'Sideways (Prod. Mad Real)',
 147                 'description': 'md5:d41d8cd98f00b204e9800998ecf8427e',
 148                 'uploader': 'garyvee',
 149                 'upload_date': '20170226',
 150                 'duration': 207,
 151                 'thumbnail': r're:https?://.*\.jpg',
 152                 'license': 'all-rights-reserved',
 153             },
 154             'params': {
 155                 'skip_download': True,
 156             },
 157         },
 158     ]
 159
 160     _CLIENT_ID = 'LvWovRaJZlWCHql0bISuum8Bd2KX79mb'
 161
 162     @staticmethod
 163     def _extract_urls(webpage):
 164         return [m.group('url') for m in re.finditer(
 165             r'<iframe[^>]+src=(["\'])(?P<url>(?:https?://)?(?:w\.)?soundcloud\.com/player.+?)\1',
 166             webpage)]
 167
 168     def report_resolve(self, video_id):
 169         """Report information extraction."""
 170         self.to_screen('%s: Resolving id' % video_id)
 171
 172     @classmethod
 173     def _resolv_url(cls, url):
 174         return 'https://api.soundcloud.com/resolve.json?url=' + url + '&client_id=' + cls._CLIENT_ID
 175
 176     def _extract_info_dict(self, info, full_title=None, quiet=False, secret_token=None):
 177         track_id = compat_str(info['id'])
 178         name = full_title or track_id
 179         if quiet:
 180             self.report_extraction(name)
 181         thumbnail = info.get('artwork_url') or info.get('user', {}).get('avatar_url')
 182         if isinstance(thumbnail, compat_str):
 183             thumbnail = thumbnail.replace('-large', '-t500x500')
 184         ext = 'mp3'
 185         result = {
 186             'id': track_id,
 187             'uploader': info.get('user', {}).get('username'),
 188             'upload_date': unified_strdate(info.get('created_at')),
 189             'title': info['title'],
 190             'description': info.get('description'),
 191             'thumbnail': thumbnail,
 192             'duration': int_or_none(info.get('duration'), 1000),
 193             'webpage_url': info.get('permalink_url'),
 194             'license': info.get('license'),
 195         }
 196         formats = []
 197         query = {'client_id': self._CLIENT_ID}
 198         if secret_token is not None:
 199             query['secret_token'] = secret_token
 200         if info.get('downloadable', False):
 201             # We can build a direct link to the song
 202             format_url = update_url_query(
 203                 'https://api.soundcloud.com/tracks/%s/download' % track_id, query)
 204             formats.append({
 205                 'format_id': 'download',
 206                 'ext': info.get('original_format', 'mp3'),
 207                 'url': format_url,
 208                 'vcodec': 'none',
 209                 'preference': 10,
 210             })
 211
 212         # We have to retrieve the url
 213         format_dict = self._download_json(
 214             'https://api.soundcloud.com/i1/tracks/%s/streams' % track_id,
 215             track_id, 'Downloading track url', query=query)
 216
 217         for key, stream_url in format_dict.items():
 218             abr = int_or_none(self._search_regex(
 219                 r'_(\d+)_url', key, 'audio bitrate', default=None))
 220             if key.startswith('http'):
 221                 stream_formats = [{
 222                     'format_id': key,
 223                     'ext': ext,
 224                     'url': stream_url,
 225                 }]
 226             elif key.startswith('rtmp'):
 227                 # The url doesn't have an rtmp app, we have to extract the playpath
 228                 url, path = stream_url.split('mp3:', 1)
 229                 stream_formats = [{
 230                     'format_id': key,
 231                     'url': url,
 232                     'play_path': 'mp3:' + path,
 233                     'ext': 'flv',
 234                 }]
 235             elif key.startswith('hls'):
 236                 stream_formats = self._extract_m3u8_formats(
 237                     stream_url, track_id, 'mp3', entry_protocol='m3u8_native',
 238                     m3u8_id=key, fatal=False)
 239             else:
 240                 continue
 241
 242             for f in stream_formats:
 243                 f['abr'] = abr
 244
 245             formats.extend(stream_formats)
 246
 247         if not formats:
 248             # We fallback to the stream_url in the original info, this
 249             # cannot be always used, sometimes it can give an HTTP 404 error
 250             formats.append({
 251                 'format_id': 'fallback',
 252                 'url': update_url_query(info['stream_url'], query),
 253                 'ext': ext,
 254             })
 255
 256         for f in formats:
 257             f['vcodec'] = 'none'
 258
 259         self._check_formats(formats, track_id)
 260         self._sort_formats(formats)
 261         result['formats'] = formats
 262
 263         return result
 264
 265     def _real_extract(self, url):
 266         mobj = re.match(self._VALID_URL, url, flags=re.VERBOSE)
 267         if mobj is None:
 268             raise ExtractorError('Invalid URL: %s' % url)
 269
 270         track_id = mobj.group('track_id')
 271
 272         if track_id is not None:
 273             info_json_url = 'https://api.soundcloud.com/tracks/' + track_id + '.json?client_id=' + self._CLIENT_ID
 274             full_title = track_id
 275             token = mobj.group('secret_token')
 276             if token:
 277                 info_json_url += '&secret_token=' + token
 278         elif mobj.group('player'):
 279             query = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
 280             real_url = query['url'][0]
 281             # If the token is in the query of the original url we have to
 282             # manually add it
 283             if 'secret_token' in query:
 284                 real_url += '?secret_token=' + query['secret_token'][0]
 285             return self.url_result(real_url)
 286         else:
 287             # extract uploader (which is in the url)
 288             uploader = mobj.group('uploader')
 289             # extract simple title (uploader + slug of song title)
 290             slug_title = mobj.group('title')
 291             token = mobj.group('token')
 292             full_title = resolve_title = '%s/%s' % (uploader, slug_title)
 293             if token:
 294                 resolve_title += '/%s' % token
 295
 296             self.report_resolve(full_title)
 297
 298             url = 'https://soundcloud.com/%s' % resolve_title
 299             info_json_url = self._resolv_url(url)
 300         info = self._download_json(info_json_url, full_title, 'Downloading info JSON')
 301
 302         return self._extract_info_dict(info, full_title, secret_token=token)
 303
 304
 305 class SoundcloudPlaylistBaseIE(SoundcloudIE):
 306     @staticmethod
 307     def _extract_id(e):
 308         return compat_str(e['id']) if e.get('id') else None
 309
 310     def _extract_track_entries(self, tracks):
 311         return [
 312             self.url_result(
 313                 track['permalink_url'], SoundcloudIE.ie_key(),
 314                 video_id=self._extract_id(track))
 315             for track in tracks if track.get('permalink_url')]
 316
 317
 318 class SoundcloudSetIE(SoundcloudPlaylistBaseIE):
 319     _VALID_URL = r'https?://(?:(?:www|m)\.)?soundcloud\.com/(?P<uploader>[\w\d-]+)/sets/(?P<slug_title>[\w\d-]+)(?:/(?P<token>[^?/]+))?'
 320     IE_NAME = 'soundcloud:set'
 321     _TESTS = [{
 322         'url': 'https://soundcloud.com/the-concept-band/sets/the-royal-concept-ep',
 323         'info_dict': {
 324             'id': '2284613',
 325             'title': 'The Royal Concept EP',
 326         },
 327         'playlist_mincount': 5,
 328     }, {
 329         'url': 'https://soundcloud.com/the-concept-band/sets/the-royal-concept-ep/token',
 330         'only_matching': True,
 331     }]
 332
 333     def _real_extract(self, url):
 334         mobj = re.match(self._VALID_URL, url)
 335
 336         # extract uploader (which is in the url)
 337         uploader = mobj.group('uploader')
 338         # extract simple title (uploader + slug of song title)
 339         slug_title = mobj.group('slug_title')
 340         full_title = '%s/sets/%s' % (uploader, slug_title)
 341         url = 'https://soundcloud.com/%s/sets/%s' % (uploader, slug_title)
 342
 343         token = mobj.group('token')
 344         if token:
 345             full_title += '/' + token
 346             url += '/' + token
 347
 348         self.report_resolve(full_title)
 349
 350         resolv_url = self._resolv_url(url)
 351         info = self._download_json(resolv_url, full_title)
 352
 353         if 'errors' in info:
 354             msgs = (compat_str(err['error_message']) for err in info['errors'])
 355             raise ExtractorError('unable to download video webpage: %s' % ','.join(msgs))
 356
 357         entries = self._extract_track_entries(info['tracks'])
 358
 359         return {
 360             '_type': 'playlist',
 361             'entries': entries,
 362             'id': '%s' % info['id'],
 363             'title': info['title'],
 364         }
 365
 366
 367 class SoundcloudPagedPlaylistBaseIE(SoundcloudPlaylistBaseIE):
 368     _API_BASE = 'https://api.soundcloud.com'
 369     _API_V2_BASE = 'https://api-v2.soundcloud.com'
 370
 371     def _extract_playlist(self, base_url, playlist_id, playlist_title):
 372         COMMON_QUERY = {
 373             'limit': 50,
 374             'client_id': self._CLIENT_ID,
 375             'linked_partitioning': '1',
 376         }
 377
 378         query = COMMON_QUERY.copy()
 379         query['offset'] = 0
 380
 381         next_href = base_url + '?' + compat_urllib_parse_urlencode(query)
 382
 383         entries = []
 384         for i in itertools.count():
 385             response = self._download_json(
 386                 next_href, playlist_id, 'Downloading track page %s' % (i + 1))
 387
 388             collection = response['collection']
 389             if not collection:
 390                 break
 391
 392             def resolve_permalink_url(candidates):
 393                 for cand in candidates:
 394                     if isinstance(cand, dict):
 395                         permalink_url = cand.get('permalink_url')
 396                         entry_id = self._extract_id(cand)
 397                         if permalink_url and permalink_url.startswith('http'):
 398                             return permalink_url, entry_id
 399
 400             for e in collection:
 401                 permalink_url, entry_id = resolve_permalink_url((e, e.get('track'), e.get('playlist')))
 402                 if permalink_url:
 403                     entries.append(self.url_result(permalink_url, video_id=entry_id))
 404
 405             next_href = response.get('next_href')
 406             if not next_href:
 407                 break
 408
 409             parsed_next_href = compat_urlparse.urlparse(response['next_href'])
 410             qs = compat_urlparse.parse_qs(parsed_next_href.query)
 411             qs.update(COMMON_QUERY)
 412             next_href = compat_urlparse.urlunparse(
 413                 parsed_next_href._replace(query=compat_urllib_parse_urlencode(qs, True)))
 414
 415         return {
 416             '_type': 'playlist',
 417             'id': playlist_id,
 418             'title': playlist_title,
 419             'entries': entries,
 420         }
 421
 422
 423 class SoundcloudUserIE(SoundcloudPagedPlaylistBaseIE):
 424     _VALID_URL = r'''(?x)
 425                         https?://
 426                             (?:(?:www|m)\.)?soundcloud\.com/
 427                             (?P<user>[^/]+)
 428                             (?:/
 429                                 (?P<rsrc>tracks|sets|reposts|likes|spotlight)
 430                             )?
 431                             /?(?:[?#].*)?$
 432                     '''
 433     IE_NAME = 'soundcloud:user'
 434     _TESTS = [{
 435         'url': 'https://soundcloud.com/the-akashic-chronicler',
 436         'info_dict': {
 437             'id': '114582580',
 438             'title': 'The Akashic Chronicler (All)',
 439         },
 440         'playlist_mincount': 74,
 441     }, {
 442         'url': 'https://soundcloud.com/the-akashic-chronicler/tracks',
 443         'info_dict': {
 444             'id': '114582580',
 445             'title': 'The Akashic Chronicler (Tracks)',
 446         },
 447         'playlist_mincount': 37,
 448     }, {
 449         'url': 'https://soundcloud.com/the-akashic-chronicler/sets',
 450         'info_dict': {
 451             'id': '114582580',
 452             'title': 'The Akashic Chronicler (Playlists)',
 453         },
 454         'playlist_mincount': 2,
 455     }, {
 456         'url': 'https://soundcloud.com/the-akashic-chronicler/reposts',
 457         'info_dict': {
 458             'id': '114582580',
 459             'title': 'The Akashic Chronicler (Reposts)',
 460         },
 461         'playlist_mincount': 7,
 462     }, {
 463         'url': 'https://soundcloud.com/the-akashic-chronicler/likes',
 464         'info_dict': {
 465             'id': '114582580',
 466             'title': 'The Akashic Chronicler (Likes)',
 467         },
 468         'playlist_mincount': 321,
 469     }, {
 470         'url': 'https://soundcloud.com/grynpyret/spotlight',
 471         'info_dict': {
 472             'id': '7098329',
 473             'title': 'Grynpyret (Spotlight)',
 474         },
 475         'playlist_mincount': 1,
 476     }]
 477
 478     _BASE_URL_MAP = {
 479         'all': '%s/profile/soundcloud:users:%%s' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 480         'tracks': '%s/users/%%s/tracks' % SoundcloudPagedPlaylistBaseIE._API_BASE,
 481         'sets': '%s/users/%%s/playlists' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 482         'reposts': '%s/profile/soundcloud:users:%%s/reposts' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 483         'likes': '%s/users/%%s/likes' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 484         'spotlight': '%s/users/%%s/spotlight' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 485     }
 486
 487     _TITLE_MAP = {
 488         'all': 'All',
 489         'tracks': 'Tracks',
 490         'sets': 'Playlists',
 491         'reposts': 'Reposts',
 492         'likes': 'Likes',
 493         'spotlight': 'Spotlight',
 494     }
 495
 496     def _real_extract(self, url):
 497         mobj = re.match(self._VALID_URL, url)
 498         uploader = mobj.group('user')
 499
 500         url = 'https://soundcloud.com/%s/' % uploader
 501         resolv_url = self._resolv_url(url)
 502         user = self._download_json(
 503             resolv_url, uploader, 'Downloading user info')
 504
 505         resource = mobj.group('rsrc') or 'all'
 506
 507         return self._extract_playlist(
 508             self._BASE_URL_MAP[resource] % user['id'], compat_str(user['id']),
 509             '%s (%s)' % (user['username'], self._TITLE_MAP[resource]))
 510
 511
 512 class SoundcloudTrackStationIE(SoundcloudPagedPlaylistBaseIE):
 513     _VALID_URL = r'https?://(?:(?:www|m)\.)?soundcloud\.com/stations/track/[^/]+/(?P<id>[^/?#&]+)'
 514     IE_NAME = 'soundcloud:trackstation'
 515     _TESTS = [{
 516         'url': 'https://soundcloud.com/stations/track/officialsundial/your-text',
 517         'info_dict': {
 518             'id': '286017854',
 519             'title': 'Track station: your-text',
 520         },
 521         'playlist_mincount': 47,
 522     }]
 523
 524     def _real_extract(self, url):
 525         track_name = self._match_id(url)
 526
 527         webpage = self._download_webpage(url, track_name)
 528
 529         track_id = self._search_regex(
 530             r'soundcloud:track-stations:(\d+)', webpage, 'track id')
 531
 532         return self._extract_playlist(
 533             '%s/stations/soundcloud:track-stations:%s/tracks'
 534             % (self._API_V2_BASE, track_id),
 535             track_id, 'Track station: %s' % track_name)
 536
 537
 538 class SoundcloudPlaylistIE(SoundcloudPlaylistBaseIE):
 539     _VALID_URL = r'https?://api\.soundcloud\.com/playlists/(?P<id>[0-9]+)(?:/?\?secret_token=(?P<token>[^&]+?))?$'
 540     IE_NAME = 'soundcloud:playlist'
 541     _TESTS = [{
 542         'url': 'https://api.soundcloud.com/playlists/4110309',
 543         'info_dict': {
 544             'id': '4110309',
 545             'title': 'TILT Brass - Bowery Poetry Club, August \'03 [Non-Site SCR 02]',
 546             'description': 're:.*?TILT Brass - Bowery Poetry Club',
 547         },
 548         'playlist_count': 6,
 549     }]
 550
 551     def _real_extract(self, url):
 552         mobj = re.match(self._VALID_URL, url)
 553         playlist_id = mobj.group('id')
 554         base_url = '%s//api.soundcloud.com/playlists/%s.json?' % (self.http_scheme(), playlist_id)
 555
 556         data_dict = {
 557             'client_id': self._CLIENT_ID,
 558         }
 559         token = mobj.group('token')
 560
 561         if token:
 562             data_dict['secret_token'] = token
 563
 564         data = compat_urllib_parse_urlencode(data_dict)
 565         data = self._download_json(
 566             base_url + data, playlist_id, 'Downloading playlist')
 567
 568         entries = self._extract_track_entries(data['tracks'])
 569
 570         return {
 571             '_type': 'playlist',
 572             'id': playlist_id,
 573             'title': data.get('title'),
 574             'description': data.get('description'),
 575             'entries': entries,
 576         }
 577
 578
 579 class SoundcloudSearchIE(SearchInfoExtractor, SoundcloudIE):
 580     IE_NAME = 'soundcloud:search'
 581     IE_DESC = 'Soundcloud search'
 582     _MAX_RESULTS = float('inf')
 583     _TESTS = [{
 584         'url': 'scsearch15:post-avant jazzcore',
 585         'info_dict': {
 586             'title': 'post-avant jazzcore',
 587         },
 588         'playlist_count': 15,
 589     }]
 590
 591     _SEARCH_KEY = 'scsearch'
 592     _MAX_RESULTS_PER_PAGE = 200
 593     _DEFAULT_RESULTS_PER_PAGE = 50
 594     _API_V2_BASE = 'https://api-v2.soundcloud.com'
 595
 596     def _get_collection(self, endpoint, collection_id, **query):
 597         limit = min(
 598             query.get('limit', self._DEFAULT_RESULTS_PER_PAGE),
 599             self._MAX_RESULTS_PER_PAGE)
 600         query['limit'] = limit
 601         query['client_id'] = self._CLIENT_ID
 602         query['linked_partitioning'] = '1'
 603         query['offset'] = 0
 604         data = compat_urllib_parse_urlencode(query)
 605         next_url = '{0}{1}?{2}'.format(self._API_V2_BASE, endpoint, data)
 606
 607         collected_results = 0
 608
 609         for i in itertools.count(1):
 610             response = self._download_json(
 611                 next_url, collection_id, 'Downloading page {0}'.format(i),
 612                 'Unable to download API page')
 613
 614             collection = response.get('collection', [])
 615             if not collection:
 616                 break
 617
 618             collection = list(filter(bool, collection))
 619             collected_results += len(collection)
 620
 621             for item in collection:
 622                 yield self.url_result(item['uri'], SoundcloudIE.ie_key())
 623
 624             if not collection or collected_results >= limit:
 625                 break
 626
 627             next_url = response.get('next_href')
 628             if not next_url:
 629                 break
 630
 631     def _get_n_results(self, query, n):
 632         tracks = self._get_collection('/search/tracks', query, limit=n, q=query)
 633         return self.playlist_result(tracks, playlist_title=query)