_ 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     url_or_none,
  22 )
  23
  24
  25 class SoundcloudIE(InfoExtractor):
  26     """Information extractor for soundcloud.com
  27        To access the media, the uid of the song and a stream token
  28        must be extracted from the page source and the script must make
  29        a request to media.soundcloud.com/crossdomain.xml. Then
  30        the media can be grabbed by requesting from an url composed
  31        of the stream token and uid
  32      """
  33
  34     _VALID_URL = r'''(?x)^(?:https?://)?
  35                     (?:(?:(?:www\.|m\.)?soundcloud\.com/
  36                             (?!stations/track)
  37                             (?P<uploader>[\w\d-]+)/
  38                             (?!(?:tracks|albums|sets(?:/.+?)?|reposts|likes|spotlight)/?(?:$|[?#]))
  39                             (?P<title>[\w\d-]+)/?
  40                             (?P<token>[^?]+?)?(?:[?].*)?$)
  41                        |(?:api\.soundcloud\.com/tracks/(?P<track_id>\d+)
  42                           (?:/?\?secret_token=(?P<secret_token>[^&]+))?)
  43                        |(?P<player>(?:w|player|p.)\.soundcloud\.com/player/?.*?url=.*)
  44                     )
  45                     '''
  46     IE_NAME = 'soundcloud'
  47     _TESTS = [
  48         {
  49             'url': 'http://soundcloud.com/ethmusic/lostin-powers-she-so-heavy',
  50             'md5': 'ebef0a451b909710ed1d7787dddbf0d7',
  51             'info_dict': {
  52                 'id': '62986583',
  53                 'ext': 'mp3',
  54                 'upload_date': '20121011',
  55                 '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',
  56                 'uploader': 'E.T. ExTerrestrial Music',
  57                 'title': 'Lostin Powers - She so Heavy (SneakPreview) Adrian Ackers Blueprint 1',
  58                 'duration': 143,
  59                 'license': 'all-rights-reserved',
  60             }
  61         },
  62         # not streamable song
  63         {
  64             'url': 'https://soundcloud.com/the-concept-band/goldrushed-mastered?in=the-concept-band/sets/the-royal-concept-ep',
  65             'info_dict': {
  66                 'id': '47127627',
  67                 'ext': 'mp3',
  68                 'title': 'Goldrushed',
  69                 'description': 'From Stockholm Sweden\r\nPovel / Magnus / Filip / David\r\nwww.theroyalconcept.com',
  70                 'uploader': 'The Royal Concept',
  71                 'upload_date': '20120521',
  72                 'duration': 227,
  73                 'license': 'all-rights-reserved',
  74             },
  75             'params': {
  76                 # rtmp
  77                 'skip_download': True,
  78             },
  79         },
  80         # private link
  81         {
  82             'url': 'https://soundcloud.com/jaimemf/youtube-dl-test-video-a-y-baw/s-8Pjrp',
  83             'md5': 'aa0dd32bfea9b0c5ef4f02aacd080604',
  84             'info_dict': {
  85                 'id': '123998367',
  86                 'ext': 'mp3',
  87                 'title': 'Youtube - Dl Test Video \'\' Ä↭',
  88                 'uploader': 'jaimeMF',
  89                 'description': 'test chars:  \"\'/\\ä↭',
  90                 'upload_date': '20131209',
  91                 'duration': 9,
  92                 'license': 'all-rights-reserved',
  93             },
  94         },
  95         # private link (alt format)
  96         {
  97             'url': 'https://api.soundcloud.com/tracks/123998367?secret_token=s-8Pjrp',
  98             'md5': 'aa0dd32bfea9b0c5ef4f02aacd080604',
  99             'info_dict': {
 100                 'id': '123998367',
 101                 'ext': 'mp3',
 102                 'title': 'Youtube - Dl Test Video \'\' Ä↭',
 103                 'uploader': 'jaimeMF',
 104                 'description': 'test chars:  \"\'/\\ä↭',
 105                 'upload_date': '20131209',
 106                 'duration': 9,
 107                 'license': 'all-rights-reserved',
 108             },
 109         },
 110         # downloadable song
 111         {
 112             'url': 'https://soundcloud.com/oddsamples/bus-brakes',
 113             'md5': '7624f2351f8a3b2e7cd51522496e7631',
 114             'info_dict': {
 115                 'id': '128590877',
 116                 'ext': 'mp3',
 117                 'title': 'Bus Brakes',
 118                 'description': 'md5:0053ca6396e8d2fd7b7e1595ef12ab66',
 119                 'uploader': 'oddsamples',
 120                 'upload_date': '20140109',
 121                 'duration': 17,
 122                 'license': 'cc-by-sa',
 123             },
 124         },
 125         # private link, downloadable format
 126         {
 127             'url': 'https://soundcloud.com/oriuplift/uponly-238-no-talking-wav/s-AyZUd',
 128             'md5': '64a60b16e617d41d0bef032b7f55441e',
 129             'info_dict': {
 130                 'id': '340344461',
 131                 'ext': 'wav',
 132                 'title': 'Uplifting Only 238 [No Talking] (incl. Alex Feed Guestmix) (Aug 31, 2017) [wav]',
 133                 'description': 'md5:fa20ee0fca76a3d6df8c7e57f3715366',
 134                 'uploader': 'Ori Uplift Music',
 135                 'upload_date': '20170831',
 136                 'duration': 7449,
 137                 'license': 'all-rights-reserved',
 138             },
 139         },
 140         # no album art, use avatar pic for thumbnail
 141         {
 142             'url': 'https://soundcloud.com/garyvee/sideways-prod-mad-real',
 143             'md5': '59c7872bc44e5d99b7211891664760c2',
 144             'info_dict': {
 145                 'id': '309699954',
 146                 'ext': 'mp3',
 147                 'title': 'Sideways (Prod. Mad Real)',
 148                 'description': 'md5:d41d8cd98f00b204e9800998ecf8427e',
 149                 'uploader': 'garyvee',
 150                 'upload_date': '20170226',
 151                 'duration': 207,
 152                 'thumbnail': r're:https?://.*\.jpg',
 153                 'license': 'all-rights-reserved',
 154             },
 155             'params': {
 156                 'skip_download': True,
 157             },
 158         },
 159     ]
 160
 161     _CLIENT_ID = 'NmW1FlPaiL94ueEu7oziOWjYEzZzQDcK'
 162
 163     @staticmethod
 164     def _extract_urls(webpage):
 165         return [m.group('url') for m in re.finditer(
 166             r'<iframe[^>]+src=(["\'])(?P<url>(?:https?://)?(?:w\.)?soundcloud\.com/player.+?)\1',
 167             webpage)]
 168
 169     def report_resolve(self, video_id):
 170         """Report information extraction."""
 171         self.to_screen('%s: Resolving id' % video_id)
 172
 173     @classmethod
 174     def _resolv_url(cls, url):
 175         return 'https://api.soundcloud.com/resolve.json?url=' + url + '&client_id=' + cls._CLIENT_ID
 176
 177     def _extract_info_dict(self, info, full_title=None, quiet=False, secret_token=None):
 178         track_id = compat_str(info['id'])
 179         name = full_title or track_id
 180         if quiet:
 181             self.report_extraction(name)
 182         thumbnail = info.get('artwork_url') or info.get('user', {}).get('avatar_url')
 183         if isinstance(thumbnail, compat_str):
 184             thumbnail = thumbnail.replace('-large', '-t500x500')
 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             ext, abr = 'mp3', None
 219             mobj = re.search(r'_([^_]+)_(\d+)_url', key)
 220             if mobj:
 221                 ext, abr = mobj.groups()
 222                 abr = int(abr)
 223             if key.startswith('http'):
 224                 stream_formats = [{
 225                     'format_id': key,
 226                     'ext': ext,
 227                     'url': stream_url,
 228                 }]
 229             elif key.startswith('rtmp'):
 230                 # The url doesn't have an rtmp app, we have to extract the playpath
 231                 url, path = stream_url.split('mp3:', 1)
 232                 stream_formats = [{
 233                     'format_id': key,
 234                     'url': url,
 235                     'play_path': 'mp3:' + path,
 236                     'ext': 'flv',
 237                 }]
 238             elif key.startswith('hls'):
 239                 stream_formats = self._extract_m3u8_formats(
 240                     stream_url, track_id, ext, entry_protocol='m3u8_native',
 241                     m3u8_id=key, fatal=False)
 242             else:
 243                 continue
 244
 245             if abr:
 246                 for f in stream_formats:
 247                     f['abr'] = abr
 248
 249             formats.extend(stream_formats)
 250
 251         if not formats:
 252             # We fallback to the stream_url in the original info, this
 253             # cannot be always used, sometimes it can give an HTTP 404 error
 254             formats.append({
 255                 'format_id': 'fallback',
 256                 'url': update_url_query(info['stream_url'], query),
 257                 'ext': 'mp3',
 258             })
 259
 260         for f in formats:
 261             f['vcodec'] = 'none'
 262
 263         self._check_formats(formats, track_id)
 264         self._sort_formats(formats)
 265         result['formats'] = formats
 266
 267         return result
 268
 269     def _real_extract(self, url):
 270         mobj = re.match(self._VALID_URL, url, flags=re.VERBOSE)
 271         if mobj is None:
 272             raise ExtractorError('Invalid URL: %s' % url)
 273
 274         track_id = mobj.group('track_id')
 275
 276         if track_id is not None:
 277             info_json_url = 'https://api.soundcloud.com/tracks/' + track_id + '.json?client_id=' + self._CLIENT_ID
 278             full_title = track_id
 279             token = mobj.group('secret_token')
 280             if token:
 281                 info_json_url += '&secret_token=' + token
 282         elif mobj.group('player'):
 283             query = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
 284             real_url = query['url'][0]
 285             # If the token is in the query of the original url we have to
 286             # manually add it
 287             if 'secret_token' in query:
 288                 real_url += '?secret_token=' + query['secret_token'][0]
 289             return self.url_result(real_url)
 290         else:
 291             # extract uploader (which is in the url)
 292             uploader = mobj.group('uploader')
 293             # extract simple title (uploader + slug of song title)
 294             slug_title = mobj.group('title')
 295             token = mobj.group('token')
 296             full_title = resolve_title = '%s/%s' % (uploader, slug_title)
 297             if token:
 298                 resolve_title += '/%s' % token
 299
 300             self.report_resolve(full_title)
 301
 302             url = 'https://soundcloud.com/%s' % resolve_title
 303             info_json_url = self._resolv_url(url)
 304         info = self._download_json(info_json_url, full_title, 'Downloading info JSON')
 305
 306         return self._extract_info_dict(info, full_title, secret_token=token)
 307
 308
 309 class SoundcloudPlaylistBaseIE(SoundcloudIE):
 310     @staticmethod
 311     def _extract_id(e):
 312         return compat_str(e['id']) if e.get('id') else None
 313
 314     def _extract_track_entries(self, tracks):
 315         return [
 316             self.url_result(
 317                 track['permalink_url'], SoundcloudIE.ie_key(),
 318                 video_id=self._extract_id(track))
 319             for track in tracks if track.get('permalink_url')]
 320
 321
 322 class SoundcloudSetIE(SoundcloudPlaylistBaseIE):
 323     _VALID_URL = r'https?://(?:(?:www|m)\.)?soundcloud\.com/(?P<uploader>[\w\d-]+)/sets/(?P<slug_title>[\w\d-]+)(?:/(?P<token>[^?/]+))?'
 324     IE_NAME = 'soundcloud:set'
 325     _TESTS = [{
 326         'url': 'https://soundcloud.com/the-concept-band/sets/the-royal-concept-ep',
 327         'info_dict': {
 328             'id': '2284613',
 329             'title': 'The Royal Concept EP',
 330         },
 331         'playlist_mincount': 5,
 332     }, {
 333         'url': 'https://soundcloud.com/the-concept-band/sets/the-royal-concept-ep/token',
 334         'only_matching': True,
 335     }]
 336
 337     def _real_extract(self, url):
 338         mobj = re.match(self._VALID_URL, url)
 339
 340         # extract uploader (which is in the url)
 341         uploader = mobj.group('uploader')
 342         # extract simple title (uploader + slug of song title)
 343         slug_title = mobj.group('slug_title')
 344         full_title = '%s/sets/%s' % (uploader, slug_title)
 345         url = 'https://soundcloud.com/%s/sets/%s' % (uploader, slug_title)
 346
 347         token = mobj.group('token')
 348         if token:
 349             full_title += '/' + token
 350             url += '/' + token
 351
 352         self.report_resolve(full_title)
 353
 354         resolv_url = self._resolv_url(url)
 355         info = self._download_json(resolv_url, full_title)
 356
 357         if 'errors' in info:
 358             msgs = (compat_str(err['error_message']) for err in info['errors'])
 359             raise ExtractorError('unable to download video webpage: %s' % ','.join(msgs))
 360
 361         entries = self._extract_track_entries(info['tracks'])
 362
 363         return {
 364             '_type': 'playlist',
 365             'entries': entries,
 366             'id': '%s' % info['id'],
 367             'title': info['title'],
 368         }
 369
 370
 371 class SoundcloudPagedPlaylistBaseIE(SoundcloudPlaylistBaseIE):
 372     _API_V2_BASE = 'https://api-v2.soundcloud.com'
 373
 374     def _extract_playlist(self, base_url, playlist_id, playlist_title):
 375         COMMON_QUERY = {
 376             'limit': 50,
 377             'client_id': self._CLIENT_ID,
 378             'linked_partitioning': '1',
 379         }
 380
 381         query = COMMON_QUERY.copy()
 382         query['offset'] = 0
 383
 384         next_href = base_url + '?' + compat_urllib_parse_urlencode(query)
 385
 386         entries = []
 387         for i in itertools.count():
 388             response = self._download_json(
 389                 next_href, playlist_id, 'Downloading track page %s' % (i + 1))
 390
 391             collection = response['collection']
 392
 393             if not isinstance(collection, list):
 394                 collection = []
 395
 396             # Empty collection may be returned, in this case we proceed
 397             # straight to next_href
 398
 399             def resolve_entry(candidates):
 400                 for cand in candidates:
 401                     if not isinstance(cand, dict):
 402                         continue
 403                     permalink_url = url_or_none(cand.get('permalink_url'))
 404                     if not permalink_url:
 405                         continue
 406                     return self.url_result(
 407                         permalink_url,
 408                         ie=SoundcloudIE.ie_key() if SoundcloudIE.suitable(permalink_url) else None,
 409                         video_id=self._extract_id(cand),
 410                         video_title=cand.get('title'))
 411
 412             for e in collection:
 413                 entry = resolve_entry((e, e.get('track'), e.get('playlist')))
 414                 if entry:
 415                     entries.append(entry)
 416
 417             next_href = response.get('next_href')
 418             if not next_href:
 419                 break
 420
 421             parsed_next_href = compat_urlparse.urlparse(response['next_href'])
 422             qs = compat_urlparse.parse_qs(parsed_next_href.query)
 423             qs.update(COMMON_QUERY)
 424             next_href = compat_urlparse.urlunparse(
 425                 parsed_next_href._replace(query=compat_urllib_parse_urlencode(qs, True)))
 426
 427         return {
 428             '_type': 'playlist',
 429             'id': playlist_id,
 430             'title': playlist_title,
 431             'entries': entries,
 432         }
 433
 434
 435 class SoundcloudUserIE(SoundcloudPagedPlaylistBaseIE):
 436     _VALID_URL = r'''(?x)
 437                         https?://
 438                             (?:(?:www|m)\.)?soundcloud\.com/
 439                             (?P<user>[^/]+)
 440                             (?:/
 441                                 (?P<rsrc>tracks|albums|sets|reposts|likes|spotlight)
 442                             )?
 443                             /?(?:[?#].*)?$
 444                     '''
 445     IE_NAME = 'soundcloud:user'
 446     _TESTS = [{
 447         'url': 'https://soundcloud.com/soft-cell-official',
 448         'info_dict': {
 449             'id': '207965082',
 450             'title': 'Soft Cell (All)',
 451         },
 452         'playlist_mincount': 28,
 453     }, {
 454         'url': 'https://soundcloud.com/soft-cell-official/tracks',
 455         'info_dict': {
 456             'id': '207965082',
 457             'title': 'Soft Cell (Tracks)',
 458         },
 459         'playlist_mincount': 27,
 460     }, {
 461         'url': 'https://soundcloud.com/soft-cell-official/albums',
 462         'info_dict': {
 463             'id': '207965082',
 464             'title': 'Soft Cell (Albums)',
 465         },
 466         'playlist_mincount': 1,
 467     }, {
 468         'url': 'https://soundcloud.com/jcv246/sets',
 469         'info_dict': {
 470             'id': '12982173',
 471             'title': 'Jordi / cv (Playlists)',
 472         },
 473         'playlist_mincount': 2,
 474     }, {
 475         'url': 'https://soundcloud.com/jcv246/reposts',
 476         'info_dict': {
 477             'id': '12982173',
 478             'title': 'Jordi / cv (Reposts)',
 479         },
 480         'playlist_mincount': 6,
 481     }, {
 482         'url': 'https://soundcloud.com/clalberg/likes',
 483         'info_dict': {
 484             'id': '11817582',
 485             'title': 'clalberg (Likes)',
 486         },
 487         'playlist_mincount': 5,
 488     }, {
 489         'url': 'https://soundcloud.com/grynpyret/spotlight',
 490         'info_dict': {
 491             'id': '7098329',
 492             'title': 'Grynpyret (Spotlight)',
 493         },
 494         'playlist_mincount': 1,
 495     }]
 496
 497     _BASE_URL_MAP = {
 498         'all': '%s/stream/users/%%s' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 499         'tracks': '%s/users/%%s/tracks' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 500         'albums': '%s/users/%%s/albums' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 501         'sets': '%s/users/%%s/playlists' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 502         'reposts': '%s/stream/users/%%s/reposts' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 503         'likes': '%s/users/%%s/likes' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 504         'spotlight': '%s/users/%%s/spotlight' % SoundcloudPagedPlaylistBaseIE._API_V2_BASE,
 505     }
 506
 507     _TITLE_MAP = {
 508         'all': 'All',
 509         'tracks': 'Tracks',
 510         'albums': 'Albums',
 511         'sets': 'Playlists',
 512         'reposts': 'Reposts',
 513         'likes': 'Likes',
 514         'spotlight': 'Spotlight',
 515     }
 516
 517     def _real_extract(self, url):
 518         mobj = re.match(self._VALID_URL, url)
 519         uploader = mobj.group('user')
 520
 521         url = 'https://soundcloud.com/%s/' % uploader
 522         resolv_url = self._resolv_url(url)
 523         user = self._download_json(
 524             resolv_url, uploader, 'Downloading user info')
 525
 526         resource = mobj.group('rsrc') or 'all'
 527
 528         return self._extract_playlist(
 529             self._BASE_URL_MAP[resource] % user['id'], compat_str(user['id']),
 530             '%s (%s)' % (user['username'], self._TITLE_MAP[resource]))
 531
 532
 533 class SoundcloudTrackStationIE(SoundcloudPagedPlaylistBaseIE):
 534     _VALID_URL = r'https?://(?:(?:www|m)\.)?soundcloud\.com/stations/track/[^/]+/(?P<id>[^/?#&]+)'
 535     IE_NAME = 'soundcloud:trackstation'
 536     _TESTS = [{
 537         'url': 'https://soundcloud.com/stations/track/officialsundial/your-text',
 538         'info_dict': {
 539             'id': '286017854',
 540             'title': 'Track station: your-text',
 541         },
 542         'playlist_mincount': 47,
 543     }]
 544
 545     def _real_extract(self, url):
 546         track_name = self._match_id(url)
 547
 548         webpage = self._download_webpage(url, track_name)
 549
 550         track_id = self._search_regex(
 551             r'soundcloud:track-stations:(\d+)', webpage, 'track id')
 552
 553         return self._extract_playlist(
 554             '%s/stations/soundcloud:track-stations:%s/tracks'
 555             % (self._API_V2_BASE, track_id),
 556             track_id, 'Track station: %s' % track_name)
 557
 558
 559 class SoundcloudPlaylistIE(SoundcloudPlaylistBaseIE):
 560     _VALID_URL = r'https?://api\.soundcloud\.com/playlists/(?P<id>[0-9]+)(?:/?\?secret_token=(?P<token>[^&]+?))?$'
 561     IE_NAME = 'soundcloud:playlist'
 562     _TESTS = [{
 563         'url': 'https://api.soundcloud.com/playlists/4110309',
 564         'info_dict': {
 565             'id': '4110309',
 566             'title': 'TILT Brass - Bowery Poetry Club, August \'03 [Non-Site SCR 02]',
 567             'description': 're:.*?TILT Brass - Bowery Poetry Club',
 568         },
 569         'playlist_count': 6,
 570     }]
 571
 572     def _real_extract(self, url):
 573         mobj = re.match(self._VALID_URL, url)
 574         playlist_id = mobj.group('id')
 575         base_url = '%s//api.soundcloud.com/playlists/%s.json?' % (self.http_scheme(), playlist_id)
 576
 577         data_dict = {
 578             'client_id': self._CLIENT_ID,
 579         }
 580         token = mobj.group('token')
 581
 582         if token:
 583             data_dict['secret_token'] = token
 584
 585         data = compat_urllib_parse_urlencode(data_dict)
 586         data = self._download_json(
 587             base_url + data, playlist_id, 'Downloading playlist')
 588
 589         entries = self._extract_track_entries(data['tracks'])
 590
 591         return {
 592             '_type': 'playlist',
 593             'id': playlist_id,
 594             'title': data.get('title'),
 595             'description': data.get('description'),
 596             'entries': entries,
 597         }
 598
 599
 600 class SoundcloudSearchIE(SearchInfoExtractor, SoundcloudIE):
 601     IE_NAME = 'soundcloud:search'
 602     IE_DESC = 'Soundcloud search'
 603     _MAX_RESULTS = float('inf')
 604     _TESTS = [{
 605         'url': 'scsearch15:post-avant jazzcore',
 606         'info_dict': {
 607             'title': 'post-avant jazzcore',
 608         },
 609         'playlist_count': 15,
 610     }]
 611
 612     _SEARCH_KEY = 'scsearch'
 613     _MAX_RESULTS_PER_PAGE = 200
 614     _DEFAULT_RESULTS_PER_PAGE = 50
 615     _API_V2_BASE = 'https://api-v2.soundcloud.com'
 616
 617     def _get_collection(self, endpoint, collection_id, **query):
 618         limit = min(
 619             query.get('limit', self._DEFAULT_RESULTS_PER_PAGE),
 620             self._MAX_RESULTS_PER_PAGE)
 621         query['limit'] = limit
 622         query['client_id'] = self._CLIENT_ID
 623         query['linked_partitioning'] = '1'
 624         query['offset'] = 0
 625         data = compat_urllib_parse_urlencode(query)
 626         next_url = '{0}{1}?{2}'.format(self._API_V2_BASE, endpoint, data)
 627
 628         collected_results = 0
 629
 630         for i in itertools.count(1):
 631             response = self._download_json(
 632                 next_url, collection_id, 'Downloading page {0}'.format(i),
 633                 'Unable to download API page')
 634
 635             collection = response.get('collection', [])
 636             if not collection:
 637                 break
 638
 639             collection = list(filter(bool, collection))
 640             collected_results += len(collection)
 641
 642             for item in collection:
 643                 yield self.url_result(item['uri'], SoundcloudIE.ie_key())
 644
 645             if not collection or collected_results >= limit:
 646                 break
 647
 648             next_url = response.get('next_href')
 649             if not next_url:
 650                 break
 651
 652     def _get_n_results(self, query, n):
 653         tracks = self._get_collection('/search/tracks', query, limit=n, q=query)
 654         return self.playlist_result(tracks, playlist_title=query)