udemy.py (19413B)
1 from __future__ import unicode_literals 2 3 import re 4 5 from .common import InfoExtractor 6 from ..compat import ( 7 compat_HTTPError, 8 compat_kwargs, 9 compat_str, 10 compat_urllib_request, 11 compat_urlparse, 12 ) 13 from ..utils import ( 14 determine_ext, 15 extract_attributes, 16 ExtractorError, 17 float_or_none, 18 int_or_none, 19 js_to_json, 20 sanitized_Request, 21 try_get, 22 unescapeHTML, 23 url_or_none, 24 urlencode_postdata, 25 ) 26 27 28 class UdemyIE(InfoExtractor): 29 IE_NAME = 'udemy' 30 _VALID_URL = r'''(?x) 31 https?:// 32 (?:[^/]+\.)?udemy\.com/ 33 (?: 34 [^#]+\#/lecture/| 35 lecture/view/?\?lectureId=| 36 [^/]+/learn/v4/t/lecture/ 37 ) 38 (?P<id>\d+) 39 ''' 40 _LOGIN_URL = 'https://www.udemy.com/join/login-popup/?displayType=ajax&showSkipButton=1' 41 _ORIGIN_URL = 'https://www.udemy.com' 42 _NETRC_MACHINE = 'udemy' 43 44 _TESTS = [{ 45 'url': 'https://www.udemy.com/java-tutorial/#/lecture/172757', 46 'md5': '98eda5b657e752cf945d8445e261b5c5', 47 'info_dict': { 48 'id': '160614', 49 'ext': 'mp4', 50 'title': 'Introduction and Installation', 51 'description': 'md5:c0d51f6f21ef4ec65f091055a5eef876', 52 'duration': 579.29, 53 }, 54 'skip': 'Requires udemy account credentials', 55 }, { 56 # new URL schema 57 'url': 'https://www.udemy.com/electric-bass-right-from-the-start/learn/v4/t/lecture/4580906', 58 'only_matching': True, 59 }, { 60 # no url in outputs format entry 61 'url': 'https://www.udemy.com/learn-web-development-complete-step-by-step-guide-to-success/learn/v4/t/lecture/4125812', 62 'only_matching': True, 63 }, { 64 # only outputs rendition 65 'url': 'https://www.udemy.com/how-you-can-help-your-local-community-5-amazing-examples/learn/v4/t/lecture/3225750?start=0', 66 'only_matching': True, 67 }, { 68 'url': 'https://wipro.udemy.com/java-tutorial/#/lecture/172757', 69 'only_matching': True, 70 }] 71 72 def _extract_course_info(self, webpage, video_id): 73 course = self._parse_json( 74 unescapeHTML(self._search_regex( 75 r'ng-init=["\'].*\bcourse=({.+?})[;"\']', 76 webpage, 'course', default='{}')), 77 video_id, fatal=False) or {} 78 course_id = course.get('id') or self._search_regex( 79 [ 80 r'data-course-id=["\'](\d+)', 81 r'"courseId"\s*:\s*(\d+)' 82 ], webpage, 'course id') 83 return course_id, course.get('title') 84 85 def _enroll_course(self, base_url, webpage, course_id): 86 def combine_url(base_url, url): 87 return compat_urlparse.urljoin(base_url, url) if not url.startswith('http') else url 88 89 checkout_url = unescapeHTML(self._search_regex( 90 r'href=(["\'])(?P<url>(?:https?://(?:www\.)?udemy\.com)?/(?:payment|cart)/checkout/.+?)\1', 91 webpage, 'checkout url', group='url', default=None)) 92 if checkout_url: 93 raise ExtractorError( 94 'Course %s is not free. You have to pay for it before you can download. ' 95 'Use this URL to confirm purchase: %s' 96 % (course_id, combine_url(base_url, checkout_url)), 97 expected=True) 98 99 enroll_url = unescapeHTML(self._search_regex( 100 r'href=(["\'])(?P<url>(?:https?://(?:www\.)?udemy\.com)?/course/subscribe/.+?)\1', 101 webpage, 'enroll url', group='url', default=None)) 102 if enroll_url: 103 webpage = self._download_webpage( 104 combine_url(base_url, enroll_url), 105 course_id, 'Enrolling in the course', 106 headers={'Referer': base_url}) 107 if '>You have enrolled in' in webpage: 108 self.to_screen('%s: Successfully enrolled in the course' % course_id) 109 110 def _download_lecture(self, course_id, lecture_id): 111 return self._download_json( 112 'https://www.udemy.com/api-2.0/users/me/subscribed-courses/%s/lectures/%s?' 113 % (course_id, lecture_id), 114 lecture_id, 'Downloading lecture JSON', query={ 115 'fields[lecture]': 'title,description,view_html,asset', 116 'fields[asset]': 'asset_type,stream_url,thumbnail_url,download_urls,stream_urls,captions,data', 117 }) 118 119 def _handle_error(self, response): 120 if not isinstance(response, dict): 121 return 122 error = response.get('error') 123 if error: 124 error_str = 'Udemy returned error #%s: %s' % (error.get('code'), error.get('message')) 125 error_data = error.get('data') 126 if error_data: 127 error_str += ' - %s' % error_data.get('formErrors') 128 raise ExtractorError(error_str, expected=True) 129 130 def _download_webpage_handle(self, *args, **kwargs): 131 headers = kwargs.get('headers', {}).copy() 132 headers['User-Agent'] = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36' 133 kwargs['headers'] = headers 134 ret = super(UdemyIE, self)._download_webpage_handle( 135 *args, **compat_kwargs(kwargs)) 136 if not ret: 137 return ret 138 webpage, _ = ret 139 if any(p in webpage for p in ( 140 '>Please verify you are a human', 141 'Access to this page has been denied because we believe you are using automation tools to browse the website', 142 '"_pxCaptcha"')): 143 raise ExtractorError( 144 'Udemy asks you to solve a CAPTCHA. Login with browser, ' 145 'solve CAPTCHA, then export cookies and pass cookie file to ' 146 'youtube-dl with --cookies.', expected=True) 147 return ret 148 149 def _download_json(self, url_or_request, *args, **kwargs): 150 headers = { 151 'X-Udemy-Snail-Case': 'true', 152 'X-Requested-With': 'XMLHttpRequest', 153 } 154 for cookie in self._downloader.cookiejar: 155 if cookie.name == 'client_id': 156 headers['X-Udemy-Client-Id'] = cookie.value 157 elif cookie.name == 'access_token': 158 headers['X-Udemy-Bearer-Token'] = cookie.value 159 headers['X-Udemy-Authorization'] = 'Bearer %s' % cookie.value 160 161 if isinstance(url_or_request, compat_urllib_request.Request): 162 for header, value in headers.items(): 163 url_or_request.add_header(header, value) 164 else: 165 url_or_request = sanitized_Request(url_or_request, headers=headers) 166 167 response = super(UdemyIE, self)._download_json(url_or_request, *args, **kwargs) 168 self._handle_error(response) 169 return response 170 171 def _real_initialize(self): 172 self._login() 173 174 def _login(self): 175 username, password = self._get_login_info() 176 if username is None: 177 return 178 179 login_popup = self._download_webpage( 180 self._LOGIN_URL, None, 'Downloading login popup') 181 182 def is_logged(webpage): 183 return any(re.search(p, webpage) for p in ( 184 r'href=["\'](?:https://www\.udemy\.com)?/user/logout/', 185 r'>Logout<')) 186 187 # already logged in 188 if is_logged(login_popup): 189 return 190 191 login_form = self._form_hidden_inputs('login-form', login_popup) 192 193 login_form.update({ 194 'email': username, 195 'password': password, 196 }) 197 198 response = self._download_webpage( 199 self._LOGIN_URL, None, 'Logging in', 200 data=urlencode_postdata(login_form), 201 headers={ 202 'Referer': self._ORIGIN_URL, 203 'Origin': self._ORIGIN_URL, 204 }) 205 206 if not is_logged(response): 207 error = self._html_search_regex( 208 r'(?s)<div[^>]+class="form-errors[^"]*">(.+?)</div>', 209 response, 'error message', default=None) 210 if error: 211 raise ExtractorError('Unable to login: %s' % error, expected=True) 212 raise ExtractorError('Unable to log in') 213 214 def _real_extract(self, url): 215 lecture_id = self._match_id(url) 216 217 webpage = self._download_webpage(url, lecture_id) 218 219 course_id, _ = self._extract_course_info(webpage, lecture_id) 220 221 try: 222 lecture = self._download_lecture(course_id, lecture_id) 223 except ExtractorError as e: 224 # Error could possibly mean we are not enrolled in the course 225 if isinstance(e.cause, compat_HTTPError) and e.cause.code == 403: 226 self._enroll_course(url, webpage, course_id) 227 lecture = self._download_lecture(course_id, lecture_id) 228 else: 229 raise 230 231 title = lecture['title'] 232 description = lecture.get('description') 233 234 asset = lecture['asset'] 235 236 asset_type = asset.get('asset_type') or asset.get('assetType') 237 if asset_type != 'Video': 238 raise ExtractorError( 239 'Lecture %s is not a video' % lecture_id, expected=True) 240 241 stream_url = asset.get('stream_url') or asset.get('streamUrl') 242 if stream_url: 243 youtube_url = self._search_regex( 244 r'(https?://www\.youtube\.com/watch\?v=.*)', stream_url, 'youtube URL', default=None) 245 if youtube_url: 246 return self.url_result(youtube_url, 'Youtube') 247 248 video_id = compat_str(asset['id']) 249 thumbnail = asset.get('thumbnail_url') or asset.get('thumbnailUrl') 250 duration = float_or_none(asset.get('data', {}).get('duration')) 251 252 subtitles = {} 253 automatic_captions = {} 254 255 formats = [] 256 257 def extract_output_format(src, f_id): 258 return { 259 'url': src.get('url'), 260 'format_id': '%sp' % (src.get('height') or f_id), 261 'width': int_or_none(src.get('width')), 262 'height': int_or_none(src.get('height')), 263 'vbr': int_or_none(src.get('video_bitrate_in_kbps')), 264 'vcodec': src.get('video_codec'), 265 'fps': int_or_none(src.get('frame_rate')), 266 'abr': int_or_none(src.get('audio_bitrate_in_kbps')), 267 'acodec': src.get('audio_codec'), 268 'asr': int_or_none(src.get('audio_sample_rate')), 269 'tbr': int_or_none(src.get('total_bitrate_in_kbps')), 270 'filesize': int_or_none(src.get('file_size_in_bytes')), 271 } 272 273 outputs = asset.get('data', {}).get('outputs') 274 if not isinstance(outputs, dict): 275 outputs = {} 276 277 def add_output_format_meta(f, key): 278 output = outputs.get(key) 279 if isinstance(output, dict): 280 output_format = extract_output_format(output, key) 281 output_format.update(f) 282 return output_format 283 return f 284 285 def extract_formats(source_list): 286 if not isinstance(source_list, list): 287 return 288 for source in source_list: 289 video_url = url_or_none(source.get('file') or source.get('src')) 290 if not video_url: 291 continue 292 if source.get('type') == 'application/x-mpegURL' or determine_ext(video_url) == 'm3u8': 293 formats.extend(self._extract_m3u8_formats( 294 video_url, video_id, 'mp4', entry_protocol='m3u8_native', 295 m3u8_id='hls', fatal=False)) 296 continue 297 format_id = source.get('label') 298 f = { 299 'url': video_url, 300 'format_id': '%sp' % format_id, 301 'height': int_or_none(format_id), 302 } 303 if format_id: 304 # Some videos contain additional metadata (e.g. 305 # https://www.udemy.com/ios9-swift/learn/#/lecture/3383208) 306 f = add_output_format_meta(f, format_id) 307 formats.append(f) 308 309 def extract_subtitles(track_list): 310 if not isinstance(track_list, list): 311 return 312 for track in track_list: 313 if not isinstance(track, dict): 314 continue 315 if track.get('kind') != 'captions': 316 continue 317 src = url_or_none(track.get('src')) 318 if not src: 319 continue 320 lang = track.get('language') or track.get( 321 'srclang') or track.get('label') 322 sub_dict = automatic_captions if track.get( 323 'autogenerated') is True else subtitles 324 sub_dict.setdefault(lang, []).append({ 325 'url': src, 326 }) 327 328 for url_kind in ('download', 'stream'): 329 urls = asset.get('%s_urls' % url_kind) 330 if isinstance(urls, dict): 331 extract_formats(urls.get('Video')) 332 333 captions = asset.get('captions') 334 if isinstance(captions, list): 335 for cc in captions: 336 if not isinstance(cc, dict): 337 continue 338 cc_url = url_or_none(cc.get('url')) 339 if not cc_url: 340 continue 341 lang = try_get(cc, lambda x: x['locale']['locale'], compat_str) 342 sub_dict = (automatic_captions if cc.get('source') == 'auto' 343 else subtitles) 344 sub_dict.setdefault(lang or 'en', []).append({ 345 'url': cc_url, 346 }) 347 348 view_html = lecture.get('view_html') 349 if view_html: 350 view_html_urls = set() 351 for source in re.findall(r'<source[^>]+>', view_html): 352 attributes = extract_attributes(source) 353 src = attributes.get('src') 354 if not src: 355 continue 356 res = attributes.get('data-res') 357 height = int_or_none(res) 358 if src in view_html_urls: 359 continue 360 view_html_urls.add(src) 361 if attributes.get('type') == 'application/x-mpegURL' or determine_ext(src) == 'm3u8': 362 m3u8_formats = self._extract_m3u8_formats( 363 src, video_id, 'mp4', entry_protocol='m3u8_native', 364 m3u8_id='hls', fatal=False) 365 for f in m3u8_formats: 366 m = re.search(r'/hls_(?P<height>\d{3,4})_(?P<tbr>\d{2,})/', f['url']) 367 if m: 368 if not f.get('height'): 369 f['height'] = int(m.group('height')) 370 if not f.get('tbr'): 371 f['tbr'] = int(m.group('tbr')) 372 formats.extend(m3u8_formats) 373 else: 374 formats.append(add_output_format_meta({ 375 'url': src, 376 'format_id': '%dp' % height if height else None, 377 'height': height, 378 }, res)) 379 380 # react rendition since 2017.04.15 (see 381 # https://github.com/ytdl-org/youtube-dl/issues/12744) 382 data = self._parse_json( 383 self._search_regex( 384 r'videojs-setup-data=(["\'])(?P<data>{.+?})\1', view_html, 385 'setup data', default='{}', group='data'), video_id, 386 transform_source=unescapeHTML, fatal=False) 387 if data and isinstance(data, dict): 388 extract_formats(data.get('sources')) 389 if not duration: 390 duration = int_or_none(data.get('duration')) 391 extract_subtitles(data.get('tracks')) 392 393 if not subtitles and not automatic_captions: 394 text_tracks = self._parse_json( 395 self._search_regex( 396 r'text-tracks=(["\'])(?P<data>\[.+?\])\1', view_html, 397 'text tracks', default='{}', group='data'), video_id, 398 transform_source=lambda s: js_to_json(unescapeHTML(s)), 399 fatal=False) 400 extract_subtitles(text_tracks) 401 402 if not formats and outputs: 403 for format_id, output in outputs.items(): 404 f = extract_output_format(output, format_id) 405 if f.get('url'): 406 formats.append(f) 407 408 self._sort_formats(formats, field_preference=('height', 'width', 'tbr', 'format_id')) 409 410 return { 411 'id': video_id, 412 'title': title, 413 'description': description, 414 'thumbnail': thumbnail, 415 'duration': duration, 416 'formats': formats, 417 'subtitles': subtitles, 418 'automatic_captions': automatic_captions, 419 } 420 421 422 class UdemyCourseIE(UdemyIE): 423 IE_NAME = 'udemy:course' 424 _VALID_URL = r'https?://(?:[^/]+\.)?udemy\.com/(?P<id>[^/?#&]+)' 425 _TESTS = [{ 426 'url': 'https://www.udemy.com/java-tutorial/', 427 'only_matching': True, 428 }, { 429 'url': 'https://wipro.udemy.com/java-tutorial/', 430 'only_matching': True, 431 }] 432 433 @classmethod 434 def suitable(cls, url): 435 return False if UdemyIE.suitable(url) else super(UdemyCourseIE, cls).suitable(url) 436 437 def _real_extract(self, url): 438 course_path = self._match_id(url) 439 440 webpage = self._download_webpage(url, course_path) 441 442 course_id, title = self._extract_course_info(webpage, course_path) 443 444 self._enroll_course(url, webpage, course_id) 445 446 response = self._download_json( 447 'https://www.udemy.com/api-2.0/courses/%s/cached-subscriber-curriculum-items' % course_id, 448 course_id, 'Downloading course curriculum', query={ 449 'fields[chapter]': 'title,object_index', 450 'fields[lecture]': 'title,asset', 451 'page_size': '1000', 452 }) 453 454 entries = [] 455 chapter, chapter_number = [None] * 2 456 for entry in response['results']: 457 clazz = entry.get('_class') 458 if clazz == 'lecture': 459 asset = entry.get('asset') 460 if isinstance(asset, dict): 461 asset_type = asset.get('asset_type') or asset.get('assetType') 462 if asset_type != 'Video': 463 continue 464 lecture_id = entry.get('id') 465 if lecture_id: 466 entry = { 467 '_type': 'url_transparent', 468 'url': 'https://www.udemy.com/%s/learn/v4/t/lecture/%s' % (course_path, entry['id']), 469 'title': entry.get('title'), 470 'ie_key': UdemyIE.ie_key(), 471 } 472 if chapter_number: 473 entry['chapter_number'] = chapter_number 474 if chapter: 475 entry['chapter'] = chapter 476 entries.append(entry) 477 elif clazz == 'chapter': 478 chapter_number = entry.get('object_index') 479 chapter = entry.get('title') 480 481 return self.playlist_result(entries, course_id, title)