import os import re from .common import InfoExtractor from ..utils import ( compat_urllib_error, compat_urllib_parse, compat_urllib_request, ExtractorError, ) class GenericIE(InfoExtractor): """Generic last-resort information extractor.""" _VALID_URL = r'.*' IE_NAME = u'generic' def report_download_webpage(self, video_id): """Report webpage download.""" if not self._downloader.params.get('test', False): self._downloader.report_warning(u'Falling back on generic information extractor.') super(GenericIE, self).report_download_webpage(video_id) def report_following_redirect(self, new_url): """Report information extraction.""" self._downloader.to_screen(u'[redirect] Following redirect to %s' % new_url) def _test_redirect(self, url): """Check if it is a redirect, like url shorteners, in case return the new url.""" class HeadRequest(compat_urllib_request.Request): def get_method(self): return "HEAD" class HEADRedirectHandler(compat_urllib_request.HTTPRedirectHandler): """ Subclass the HTTPRedirectHandler to make it use our HeadRequest also on the redirected URL """ def redirect_request(self, req, fp, code, msg, headers, newurl): if code in (301, 302, 303, 307): newurl = newurl.replace(' ', '%20') newheaders = dict((k,v) for k,v in req.headers.items() if k.lower() not in ("content-length", "content-type")) return HeadRequest(newurl, headers=newheaders, origin_req_host=req.get_origin_req_host(), unverifiable=True) else: raise compat_urllib_error.HTTPError(req.get_full_url(), code, msg, headers, fp) class HTTPMethodFallback(compat_urllib_request.BaseHandler): """ Fallback to GET if HEAD is not allowed (405 HTTP error) """ def http_error_405(self, req, fp, code, msg, headers): fp.read() fp.close() newheaders = dict((k,v) for k,v in req.headers.items() if k.lower() not in ("content-length", "content-type")) return self.parent.open(compat_urllib_request.Request(req.get_full_url(), headers=newheaders, origin_req_host=req.get_origin_req_host(), unverifiable=True)) # Build our opener opener = compat_urllib_request.OpenerDirector() for handler in [compat_urllib_request.HTTPHandler, compat_urllib_request.HTTPDefaultErrorHandler, HTTPMethodFallback, HEADRedirectHandler, compat_urllib_request.HTTPErrorProcessor, compat_urllib_request.HTTPSHandler]: opener.add_handler(handler()) response = opener.open(HeadRequest(url)) if response is None: raise ExtractorError(u'Invalid URL protocol') new_url = response.geturl() if url == new_url: return False self.report_following_redirect(new_url) return new_url def _real_extract(self, url): new_url = self._test_redirect(url) if new_url: return [self.url_result(new_url)] video_id = url.split('/')[-1] try: webpage = self._download_webpage(url, video_id) except ValueError: # since this is the last-resort InfoExtractor, if # this error is thrown, it'll be thrown here raise ExtractorError(u'Invalid URL: %s' % url) self.report_extraction(video_id) # Start with something easy: JW Player in SWFObject mobj = re.search(r'flashvars: [\'"](?:.*&)?file=(http[^\'"&]*)', webpage) if mobj is None: # Broaden the search a little bit mobj = re.search(r'[^A-Za-z0-9]?(?:file|source)=(http[^\'"&]*)', webpage) if mobj is None: # Broaden the search a little bit: JWPlayer JS loader mobj = re.search(r'[^A-Za-z0-9]?file["\']?:\s*["\'](http[^\'"&]*)', webpage) if mobj is None: # Try to find twitter cards info mobj = re.search(r'(.*)', webpage, u'video title') # video uploader is domain name video_uploader = self._search_regex(r'(?:https?://)?([^/]*)/.*', url, u'video uploader') return [{ 'id': video_id, 'url': video_url, 'uploader': video_uploader, 'upload_date': None, 'title': video_title, 'ext': video_extension, }]