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1 | import base64 | |
2 | import hashlib | |
3 | import json | |
4 | import netrc | |
5 | import os | |
6 | import re | |
7 | import socket | |
8 | import sys | |
9 | import time | |
10 | import xml.etree.ElementTree | |
11 | ||
12 | from ..utils import ( | |
13 | compat_http_client, | |
14 | compat_urllib_error, | |
15 | compat_urllib_parse_urlparse, | |
16 | compat_str, | |
17 | ||
18 | clean_html, | |
19 | compiled_regex_type, | |
20 | ExtractorError, | |
21 | RegexNotFoundError, | |
22 | sanitize_filename, | |
23 | unescapeHTML, | |
24 | ) | |
25 | _NO_DEFAULT = object() | |
26 | ||
27 | ||
28 | class InfoExtractor(object): | |
29 | """Information Extractor class. | |
30 | ||
31 | Information extractors are the classes that, given a URL, extract | |
32 | information about the video (or videos) the URL refers to. This | |
33 | information includes the real video URL, the video title, author and | |
34 | others. The information is stored in a dictionary which is then | |
35 | passed to the FileDownloader. The FileDownloader processes this | |
36 | information possibly downloading the video to the file system, among | |
37 | other possible outcomes. | |
38 | ||
39 | The dictionaries must include the following fields: | |
40 | ||
41 | id: Video identifier. | |
42 | title: Video title, unescaped. | |
43 | ||
44 | Additionally, it must contain either a formats entry or a url one: | |
45 | ||
46 | formats: A list of dictionaries for each format available, ordered | |
47 | from worst to best quality. | |
48 | ||
49 | Potential fields: | |
50 | * url Mandatory. The URL of the video file | |
51 | * ext Will be calculated from url if missing | |
52 | * format A human-readable description of the format | |
53 | ("mp4 container with h264/opus"). | |
54 | Calculated from the format_id, width, height. | |
55 | and format_note fields if missing. | |
56 | * format_id A short description of the format | |
57 | ("mp4_h264_opus" or "19"). | |
58 | Technically optional, but strongly recommended. | |
59 | * format_note Additional info about the format | |
60 | ("3D" or "DASH video") | |
61 | * width Width of the video, if known | |
62 | * height Height of the video, if known | |
63 | * resolution Textual description of width and height | |
64 | * tbr Average bitrate of audio and video in KBit/s | |
65 | * abr Average audio bitrate in KBit/s | |
66 | * acodec Name of the audio codec in use | |
67 | * asr Audio sampling rate in Hertz | |
68 | * vbr Average video bitrate in KBit/s | |
69 | * vcodec Name of the video codec in use | |
70 | * container Name of the container format | |
71 | * filesize The number of bytes, if known in advance | |
72 | * player_url SWF Player URL (used for rtmpdump). | |
73 | * protocol The protocol that will be used for the actual | |
74 | download, lower-case. | |
75 | "http", "https", "rtsp", "rtmp", "m3u8" or so. | |
76 | * preference Order number of this format. If this field is | |
77 | present and not None, the formats get sorted | |
78 | by this field, regardless of all other values. | |
79 | -1 for default (order by other properties), | |
80 | -2 or smaller for less than default. | |
81 | * quality Order number of the video quality of this | |
82 | format, irrespective of the file format. | |
83 | -1 for default (order by other properties), | |
84 | -2 or smaller for less than default. | |
85 | url: Final video URL. | |
86 | ext: Video filename extension. | |
87 | format: The video format, defaults to ext (used for --get-format) | |
88 | player_url: SWF Player URL (used for rtmpdump). | |
89 | ||
90 | The following fields are optional: | |
91 | ||
92 | display_id An alternative identifier for the video, not necessarily | |
93 | unique, but available before title. Typically, id is | |
94 | something like "4234987", title "Dancing naked mole rats", | |
95 | and display_id "dancing-naked-mole-rats" | |
96 | thumbnails: A list of dictionaries, with the following entries: | |
97 | * "url" | |
98 | * "width" (optional, int) | |
99 | * "height" (optional, int) | |
100 | * "resolution" (optional, string "{width}x{height"}, | |
101 | deprecated) | |
102 | thumbnail: Full URL to a video thumbnail image. | |
103 | description: One-line video description. | |
104 | uploader: Full name of the video uploader. | |
105 | timestamp: UNIX timestamp of the moment the video became available. | |
106 | upload_date: Video upload date (YYYYMMDD). | |
107 | If not explicitly set, calculated from timestamp. | |
108 | uploader_id: Nickname or id of the video uploader. | |
109 | location: Physical location of the video. | |
110 | subtitles: The subtitle file contents as a dictionary in the format | |
111 | {language: subtitles}. | |
112 | duration: Length of the video in seconds, as an integer. | |
113 | view_count: How many users have watched the video on the platform. | |
114 | like_count: Number of positive ratings of the video | |
115 | dislike_count: Number of negative ratings of the video | |
116 | comment_count: Number of comments on the video | |
117 | age_limit: Age restriction for the video, as an integer (years) | |
118 | webpage_url: The url to the video webpage, if given to youtube-dl it | |
119 | should allow to get the same result again. (It will be set | |
120 | by YoutubeDL if it's missing) | |
121 | categories: A list of categories that the video falls in, for example | |
122 | ["Sports", "Berlin"] | |
123 | ||
124 | Unless mentioned otherwise, the fields should be Unicode strings. | |
125 | ||
126 | Subclasses of this one should re-define the _real_initialize() and | |
127 | _real_extract() methods and define a _VALID_URL regexp. | |
128 | Probably, they should also be added to the list of extractors. | |
129 | ||
130 | Finally, the _WORKING attribute should be set to False for broken IEs | |
131 | in order to warn the users and skip the tests. | |
132 | """ | |
133 | ||
134 | _ready = False | |
135 | _downloader = None | |
136 | _WORKING = True | |
137 | ||
138 | def __init__(self, downloader=None): | |
139 | """Constructor. Receives an optional downloader.""" | |
140 | self._ready = False | |
141 | self.set_downloader(downloader) | |
142 | ||
143 | @classmethod | |
144 | def suitable(cls, url): | |
145 | """Receives a URL and returns True if suitable for this IE.""" | |
146 | ||
147 | # This does not use has/getattr intentionally - we want to know whether | |
148 | # we have cached the regexp for *this* class, whereas getattr would also | |
149 | # match the superclass | |
150 | if '_VALID_URL_RE' not in cls.__dict__: | |
151 | cls._VALID_URL_RE = re.compile(cls._VALID_URL) | |
152 | return cls._VALID_URL_RE.match(url) is not None | |
153 | ||
154 | @classmethod | |
155 | def working(cls): | |
156 | """Getter method for _WORKING.""" | |
157 | return cls._WORKING | |
158 | ||
159 | def initialize(self): | |
160 | """Initializes an instance (authentication, etc).""" | |
161 | if not self._ready: | |
162 | self._real_initialize() | |
163 | self._ready = True | |
164 | ||
165 | def extract(self, url): | |
166 | """Extracts URL information and returns it in list of dicts.""" | |
167 | self.initialize() | |
168 | return self._real_extract(url) | |
169 | ||
170 | def set_downloader(self, downloader): | |
171 | """Sets the downloader for this IE.""" | |
172 | self._downloader = downloader | |
173 | ||
174 | def _real_initialize(self): | |
175 | """Real initialization process. Redefine in subclasses.""" | |
176 | pass | |
177 | ||
178 | def _real_extract(self, url): | |
179 | """Real extraction process. Redefine in subclasses.""" | |
180 | pass | |
181 | ||
182 | @classmethod | |
183 | def ie_key(cls): | |
184 | """A string for getting the InfoExtractor with get_info_extractor""" | |
185 | return cls.__name__[:-2] | |
186 | ||
187 | @property | |
188 | def IE_NAME(self): | |
189 | return type(self).__name__[:-2] | |
190 | ||
191 | def _request_webpage(self, url_or_request, video_id, note=None, errnote=None, fatal=True): | |
192 | """ Returns the response handle """ | |
193 | if note is None: | |
194 | self.report_download_webpage(video_id) | |
195 | elif note is not False: | |
196 | if video_id is None: | |
197 | self.to_screen(u'%s' % (note,)) | |
198 | else: | |
199 | self.to_screen(u'%s: %s' % (video_id, note)) | |
200 | try: | |
201 | return self._downloader.urlopen(url_or_request) | |
202 | except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err: | |
203 | if errnote is False: | |
204 | return False | |
205 | if errnote is None: | |
206 | errnote = u'Unable to download webpage' | |
207 | errmsg = u'%s: %s' % (errnote, compat_str(err)) | |
208 | if fatal: | |
209 | raise ExtractorError(errmsg, sys.exc_info()[2], cause=err) | |
210 | else: | |
211 | self._downloader.report_warning(errmsg) | |
212 | return False | |
213 | ||
214 | def _download_webpage_handle(self, url_or_request, video_id, note=None, errnote=None, fatal=True): | |
215 | """ Returns a tuple (page content as string, URL handle) """ | |
216 | ||
217 | # Strip hashes from the URL (#1038) | |
218 | if isinstance(url_or_request, (compat_str, str)): | |
219 | url_or_request = url_or_request.partition('#')[0] | |
220 | ||
221 | urlh = self._request_webpage(url_or_request, video_id, note, errnote, fatal) | |
222 | if urlh is False: | |
223 | assert not fatal | |
224 | return False | |
225 | content_type = urlh.headers.get('Content-Type', '') | |
226 | webpage_bytes = urlh.read() | |
227 | m = re.match(r'[a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+\s*;\s*charset=(.+)', content_type) | |
228 | if m: | |
229 | encoding = m.group(1) | |
230 | else: | |
231 | m = re.search(br'<meta[^>]+charset=[\'"]?([^\'")]+)[ /\'">]', | |
232 | webpage_bytes[:1024]) | |
233 | if m: | |
234 | encoding = m.group(1).decode('ascii') | |
235 | elif webpage_bytes.startswith(b'\xff\xfe'): | |
236 | encoding = 'utf-16' | |
237 | else: | |
238 | encoding = 'utf-8' | |
239 | if self._downloader.params.get('dump_intermediate_pages', False): | |
240 | try: | |
241 | url = url_or_request.get_full_url() | |
242 | except AttributeError: | |
243 | url = url_or_request | |
244 | self.to_screen(u'Dumping request to ' + url) | |
245 | dump = base64.b64encode(webpage_bytes).decode('ascii') | |
246 | self._downloader.to_screen(dump) | |
247 | if self._downloader.params.get('write_pages', False): | |
248 | try: | |
249 | url = url_or_request.get_full_url() | |
250 | except AttributeError: | |
251 | url = url_or_request | |
252 | basen = '%s_%s' % (video_id, url) | |
253 | if len(basen) > 240: | |
254 | h = u'___' + hashlib.md5(basen.encode('utf-8')).hexdigest() | |
255 | basen = basen[:240 - len(h)] + h | |
256 | raw_filename = basen + '.dump' | |
257 | filename = sanitize_filename(raw_filename, restricted=True) | |
258 | self.to_screen(u'Saving request to ' + filename) | |
259 | with open(filename, 'wb') as outf: | |
260 | outf.write(webpage_bytes) | |
261 | ||
262 | try: | |
263 | content = webpage_bytes.decode(encoding, 'replace') | |
264 | except LookupError: | |
265 | content = webpage_bytes.decode('utf-8', 'replace') | |
266 | ||
267 | if (u'<title>Access to this site is blocked</title>' in content and | |
268 | u'Websense' in content[:512]): | |
269 | msg = u'Access to this webpage has been blocked by Websense filtering software in your network.' | |
270 | blocked_iframe = self._html_search_regex( | |
271 | r'<iframe src="([^"]+)"', content, | |
272 | u'Websense information URL', default=None) | |
273 | if blocked_iframe: | |
274 | msg += u' Visit %s for more details' % blocked_iframe | |
275 | raise ExtractorError(msg, expected=True) | |
276 | ||
277 | return (content, urlh) | |
278 | ||
279 | def _download_webpage(self, url_or_request, video_id, note=None, errnote=None, fatal=True): | |
280 | """ Returns the data of the page as a string """ | |
281 | res = self._download_webpage_handle(url_or_request, video_id, note, errnote, fatal) | |
282 | if res is False: | |
283 | return res | |
284 | else: | |
285 | content, _ = res | |
286 | return content | |
287 | ||
288 | def _download_xml(self, url_or_request, video_id, | |
289 | note=u'Downloading XML', errnote=u'Unable to download XML', | |
290 | transform_source=None, fatal=True): | |
291 | """Return the xml as an xml.etree.ElementTree.Element""" | |
292 | xml_string = self._download_webpage( | |
293 | url_or_request, video_id, note, errnote, fatal=fatal) | |
294 | if xml_string is False: | |
295 | return xml_string | |
296 | if transform_source: | |
297 | xml_string = transform_source(xml_string) | |
298 | return xml.etree.ElementTree.fromstring(xml_string.encode('utf-8')) | |
299 | ||
300 | def _download_json(self, url_or_request, video_id, | |
301 | note=u'Downloading JSON metadata', | |
302 | errnote=u'Unable to download JSON metadata', | |
303 | transform_source=None): | |
304 | json_string = self._download_webpage(url_or_request, video_id, note, errnote) | |
305 | if transform_source: | |
306 | json_string = transform_source(json_string) | |
307 | try: | |
308 | return json.loads(json_string) | |
309 | except ValueError as ve: | |
310 | raise ExtractorError('Failed to download JSON', cause=ve) | |
311 | ||
312 | def report_warning(self, msg, video_id=None): | |
313 | idstr = u'' if video_id is None else u'%s: ' % video_id | |
314 | self._downloader.report_warning( | |
315 | u'[%s] %s%s' % (self.IE_NAME, idstr, msg)) | |
316 | ||
317 | def to_screen(self, msg): | |
318 | """Print msg to screen, prefixing it with '[ie_name]'""" | |
319 | self._downloader.to_screen(u'[%s] %s' % (self.IE_NAME, msg)) | |
320 | ||
321 | def report_extraction(self, id_or_name): | |
322 | """Report information extraction.""" | |
323 | self.to_screen(u'%s: Extracting information' % id_or_name) | |
324 | ||
325 | def report_download_webpage(self, video_id): | |
326 | """Report webpage download.""" | |
327 | self.to_screen(u'%s: Downloading webpage' % video_id) | |
328 | ||
329 | def report_age_confirmation(self): | |
330 | """Report attempt to confirm age.""" | |
331 | self.to_screen(u'Confirming age') | |
332 | ||
333 | def report_login(self): | |
334 | """Report attempt to log in.""" | |
335 | self.to_screen(u'Logging in') | |
336 | ||
337 | #Methods for following #608 | |
338 | @staticmethod | |
339 | def url_result(url, ie=None, video_id=None): | |
340 | """Returns a url that points to a page that should be processed""" | |
341 | #TODO: ie should be the class used for getting the info | |
342 | video_info = {'_type': 'url', | |
343 | 'url': url, | |
344 | 'ie_key': ie} | |
345 | if video_id is not None: | |
346 | video_info['id'] = video_id | |
347 | return video_info | |
348 | @staticmethod | |
349 | def playlist_result(entries, playlist_id=None, playlist_title=None): | |
350 | """Returns a playlist""" | |
351 | video_info = {'_type': 'playlist', | |
352 | 'entries': entries} | |
353 | if playlist_id: | |
354 | video_info['id'] = playlist_id | |
355 | if playlist_title: | |
356 | video_info['title'] = playlist_title | |
357 | return video_info | |
358 | ||
359 | def _search_regex(self, pattern, string, name, default=_NO_DEFAULT, fatal=True, flags=0): | |
360 | """ | |
361 | Perform a regex search on the given string, using a single or a list of | |
362 | patterns returning the first matching group. | |
363 | In case of failure return a default value or raise a WARNING or a | |
364 | RegexNotFoundError, depending on fatal, specifying the field name. | |
365 | """ | |
366 | if isinstance(pattern, (str, compat_str, compiled_regex_type)): | |
367 | mobj = re.search(pattern, string, flags) | |
368 | else: | |
369 | for p in pattern: | |
370 | mobj = re.search(p, string, flags) | |
371 | if mobj: break | |
372 | ||
373 | if os.name != 'nt' and sys.stderr.isatty(): | |
374 | _name = u'\033[0;34m%s\033[0m' % name | |
375 | else: | |
376 | _name = name | |
377 | ||
378 | if mobj: | |
379 | # return the first matching group | |
380 | return next(g for g in mobj.groups() if g is not None) | |
381 | elif default is not _NO_DEFAULT: | |
382 | return default | |
383 | elif fatal: | |
384 | raise RegexNotFoundError(u'Unable to extract %s' % _name) | |
385 | else: | |
386 | self._downloader.report_warning(u'unable to extract %s; ' | |
387 | u'please report this issue on http://yt-dl.org/bug' % _name) | |
388 | return None | |
389 | ||
390 | def _html_search_regex(self, pattern, string, name, default=_NO_DEFAULT, fatal=True, flags=0): | |
391 | """ | |
392 | Like _search_regex, but strips HTML tags and unescapes entities. | |
393 | """ | |
394 | res = self._search_regex(pattern, string, name, default, fatal, flags) | |
395 | if res: | |
396 | return clean_html(res).strip() | |
397 | else: | |
398 | return res | |
399 | ||
400 | def _get_login_info(self): | |
401 | """ | |
402 | Get the the login info as (username, password) | |
403 | It will look in the netrc file using the _NETRC_MACHINE value | |
404 | If there's no info available, return (None, None) | |
405 | """ | |
406 | if self._downloader is None: | |
407 | return (None, None) | |
408 | ||
409 | username = None | |
410 | password = None | |
411 | downloader_params = self._downloader.params | |
412 | ||
413 | # Attempt to use provided username and password or .netrc data | |
414 | if downloader_params.get('username', None) is not None: | |
415 | username = downloader_params['username'] | |
416 | password = downloader_params['password'] | |
417 | elif downloader_params.get('usenetrc', False): | |
418 | try: | |
419 | info = netrc.netrc().authenticators(self._NETRC_MACHINE) | |
420 | if info is not None: | |
421 | username = info[0] | |
422 | password = info[2] | |
423 | else: | |
424 | raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE) | |
425 | except (IOError, netrc.NetrcParseError) as err: | |
426 | self._downloader.report_warning(u'parsing .netrc: %s' % compat_str(err)) | |
427 | ||
428 | return (username, password) | |
429 | ||
430 | # Helper functions for extracting OpenGraph info | |
431 | @staticmethod | |
432 | def _og_regexes(prop): | |
433 | content_re = r'content=(?:"([^>]+?)"|\'([^>]+?)\')' | |
434 | property_re = r'(?:name|property)=[\'"]og:%s[\'"]' % re.escape(prop) | |
435 | template = r'<meta[^>]+?%s[^>]+?%s' | |
436 | return [ | |
437 | template % (property_re, content_re), | |
438 | template % (content_re, property_re), | |
439 | ] | |
440 | ||
441 | def _og_search_property(self, prop, html, name=None, **kargs): | |
442 | if name is None: | |
443 | name = 'OpenGraph %s' % prop | |
444 | escaped = self._search_regex(self._og_regexes(prop), html, name, flags=re.DOTALL, **kargs) | |
445 | if escaped is None: | |
446 | return None | |
447 | return unescapeHTML(escaped) | |
448 | ||
449 | def _og_search_thumbnail(self, html, **kargs): | |
450 | return self._og_search_property('image', html, u'thumbnail url', fatal=False, **kargs) | |
451 | ||
452 | def _og_search_description(self, html, **kargs): | |
453 | return self._og_search_property('description', html, fatal=False, **kargs) | |
454 | ||
455 | def _og_search_title(self, html, **kargs): | |
456 | return self._og_search_property('title', html, **kargs) | |
457 | ||
458 | def _og_search_video_url(self, html, name='video url', secure=True, **kargs): | |
459 | regexes = self._og_regexes('video') | |
460 | if secure: regexes = self._og_regexes('video:secure_url') + regexes | |
461 | return self._html_search_regex(regexes, html, name, **kargs) | |
462 | ||
463 | def _og_search_url(self, html, **kargs): | |
464 | return self._og_search_property('url', html, **kargs) | |
465 | ||
466 | def _html_search_meta(self, name, html, display_name=None, fatal=False): | |
467 | if display_name is None: | |
468 | display_name = name | |
469 | return self._html_search_regex( | |
470 | r'''(?ix)<meta | |
471 | (?=[^>]+(?:itemprop|name|property)=["\']%s["\']) | |
472 | [^>]+content=["\']([^"\']+)["\']''' % re.escape(name), | |
473 | html, display_name, fatal=fatal) | |
474 | ||
475 | def _dc_search_uploader(self, html): | |
476 | return self._html_search_meta('dc.creator', html, 'uploader') | |
477 | ||
478 | def _rta_search(self, html): | |
479 | # See http://www.rtalabel.org/index.php?content=howtofaq#single | |
480 | if re.search(r'(?ix)<meta\s+name="rating"\s+' | |
481 | r' content="RTA-5042-1996-1400-1577-RTA"', | |
482 | html): | |
483 | return 18 | |
484 | return 0 | |
485 | ||
486 | def _media_rating_search(self, html): | |
487 | # See http://www.tjg-designs.com/WP/metadata-code-examples-adding-metadata-to-your-web-pages/ | |
488 | rating = self._html_search_meta('rating', html) | |
489 | ||
490 | if not rating: | |
491 | return None | |
492 | ||
493 | RATING_TABLE = { | |
494 | 'safe for kids': 0, | |
495 | 'general': 8, | |
496 | '14 years': 14, | |
497 | 'mature': 17, | |
498 | 'restricted': 19, | |
499 | } | |
500 | return RATING_TABLE.get(rating.lower(), None) | |
501 | ||
502 | def _twitter_search_player(self, html): | |
503 | return self._html_search_meta('twitter:player', html, | |
504 | 'twitter card player') | |
505 | ||
506 | def _sort_formats(self, formats): | |
507 | if not formats: | |
508 | raise ExtractorError(u'No video formats found') | |
509 | ||
510 | def _formats_key(f): | |
511 | # TODO remove the following workaround | |
512 | from ..utils import determine_ext | |
513 | if not f.get('ext') and 'url' in f: | |
514 | f['ext'] = determine_ext(f['url']) | |
515 | ||
516 | preference = f.get('preference') | |
517 | if preference is None: | |
518 | proto = f.get('protocol') | |
519 | if proto is None: | |
520 | proto = compat_urllib_parse_urlparse(f.get('url', '')).scheme | |
521 | ||
522 | preference = 0 if proto in ['http', 'https'] else -0.1 | |
523 | if f.get('ext') in ['f4f', 'f4m']: # Not yet supported | |
524 | preference -= 0.5 | |
525 | ||
526 | if f.get('vcodec') == 'none': # audio only | |
527 | if self._downloader.params.get('prefer_free_formats'): | |
528 | ORDER = [u'aac', u'mp3', u'm4a', u'webm', u'ogg', u'opus'] | |
529 | else: | |
530 | ORDER = [u'webm', u'opus', u'ogg', u'mp3', u'aac', u'm4a'] | |
531 | ext_preference = 0 | |
532 | try: | |
533 | audio_ext_preference = ORDER.index(f['ext']) | |
534 | except ValueError: | |
535 | audio_ext_preference = -1 | |
536 | else: | |
537 | if self._downloader.params.get('prefer_free_formats'): | |
538 | ORDER = [u'flv', u'mp4', u'webm'] | |
539 | else: | |
540 | ORDER = [u'webm', u'flv', u'mp4'] | |
541 | try: | |
542 | ext_preference = ORDER.index(f['ext']) | |
543 | except ValueError: | |
544 | ext_preference = -1 | |
545 | audio_ext_preference = 0 | |
546 | ||
547 | return ( | |
548 | preference, | |
549 | f.get('quality') if f.get('quality') is not None else -1, | |
550 | f.get('height') if f.get('height') is not None else -1, | |
551 | f.get('width') if f.get('width') is not None else -1, | |
552 | ext_preference, | |
553 | f.get('tbr') if f.get('tbr') is not None else -1, | |
554 | f.get('vbr') if f.get('vbr') is not None else -1, | |
555 | f.get('abr') if f.get('abr') is not None else -1, | |
556 | audio_ext_preference, | |
557 | f.get('filesize') if f.get('filesize') is not None else -1, | |
558 | f.get('format_id'), | |
559 | ) | |
560 | formats.sort(key=_formats_key) | |
561 | ||
562 | def http_scheme(self): | |
563 | """ Either "https:" or "https:", depending on the user's preferences """ | |
564 | return ( | |
565 | 'http:' | |
566 | if self._downloader.params.get('prefer_insecure', False) | |
567 | else 'https:') | |
568 | ||
569 | def _proto_relative_url(self, url, scheme=None): | |
570 | if url is None: | |
571 | return url | |
572 | if url.startswith('//'): | |
573 | if scheme is None: | |
574 | scheme = self.http_scheme() | |
575 | return scheme + url | |
576 | else: | |
577 | return url | |
578 | ||
579 | def _sleep(self, timeout, video_id, msg_template=None): | |
580 | if msg_template is None: | |
581 | msg_template = u'%(video_id)s: Waiting for %(timeout)s seconds' | |
582 | msg = msg_template % {'video_id': video_id, 'timeout': timeout} | |
583 | self.to_screen(msg) | |
584 | time.sleep(timeout) | |
585 | ||
586 | ||
587 | class SearchInfoExtractor(InfoExtractor): | |
588 | """ | |
589 | Base class for paged search queries extractors. | |
590 | They accept urls in the format _SEARCH_KEY(|all|[0-9]):{query} | |
591 | Instances should define _SEARCH_KEY and _MAX_RESULTS. | |
592 | """ | |
593 | ||
594 | @classmethod | |
595 | def _make_valid_url(cls): | |
596 | return r'%s(?P<prefix>|[1-9][0-9]*|all):(?P<query>[\s\S]+)' % cls._SEARCH_KEY | |
597 | ||
598 | @classmethod | |
599 | def suitable(cls, url): | |
600 | return re.match(cls._make_valid_url(), url) is not None | |
601 | ||
602 | def _real_extract(self, query): | |
603 | mobj = re.match(self._make_valid_url(), query) | |
604 | if mobj is None: | |
605 | raise ExtractorError(u'Invalid search query "%s"' % query) | |
606 | ||
607 | prefix = mobj.group('prefix') | |
608 | query = mobj.group('query') | |
609 | if prefix == '': | |
610 | return self._get_n_results(query, 1) | |
611 | elif prefix == 'all': | |
612 | return self._get_n_results(query, self._MAX_RESULTS) | |
613 | else: | |
614 | n = int(prefix) | |
615 | if n <= 0: | |
616 | raise ExtractorError(u'invalid download number %s for query "%s"' % (n, query)) | |
617 | elif n > self._MAX_RESULTS: | |
618 | self._downloader.report_warning(u'%s returns max %i results (you requested %i)' % (self._SEARCH_KEY, self._MAX_RESULTS, n)) | |
619 | n = self._MAX_RESULTS | |
620 | return self._get_n_results(query, n) | |
621 | ||
622 | def _get_n_results(self, query, n): | |
623 | """Get a specified number of results for a query""" | |
624 | raise NotImplementedError("This method must be implemented by subclasses") | |
625 | ||
626 | @property | |
627 | def SEARCH_KEY(self): | |
628 | return self._SEARCH_KEY |