Move GenericIE into its own file
Philipp Hagemeister
11 years ago
parent
9f4e6bbaeb
commit
9b122384e9
@ -0,0 +1,151 @@
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import os
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import re
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from .common import InfoExtractor
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from ..utils import (
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compat_urllib_error,
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compat_urllib_parse,
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compat_urllib_request,
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ExtractorError,
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)
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class GenericIE(InfoExtractor):
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"""Generic last-resort information extractor."""
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_VALID_URL = r'.*'
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IE_NAME = u'generic'
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def report_download_webpage(self, video_id):
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"""Report webpage download."""
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if not self._downloader.params.get('test', False):
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self._downloader.report_warning(u'Falling back on generic information extractor.')
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super(GenericIE, self).report_download_webpage(video_id)
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def report_following_redirect(self, new_url):
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"""Report information extraction."""
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self._downloader.to_screen(u'[redirect] Following redirect to %s' % new_url)
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def _test_redirect(self, url):
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"""Check if it is a redirect, like url shorteners, in case return the new url."""
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class HeadRequest(compat_urllib_request.Request):
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def get_method(self):
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return "HEAD"
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class HEADRedirectHandler(compat_urllib_request.HTTPRedirectHandler):
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"""
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Subclass the HTTPRedirectHandler to make it use our
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HeadRequest also on the redirected URL
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"""
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def redirect_request(self, req, fp, code, msg, headers, newurl):
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if code in (301, 302, 303, 307):
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newurl = newurl.replace(' ', '%20')
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newheaders = dict((k,v) for k,v in req.headers.items()
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if k.lower() not in ("content-length", "content-type"))
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return HeadRequest(newurl,
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headers=newheaders,
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origin_req_host=req.get_origin_req_host(),
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unverifiable=True)
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else:
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raise compat_urllib_error.HTTPError(req.get_full_url(), code, msg, headers, fp)
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class HTTPMethodFallback(compat_urllib_request.BaseHandler):
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"""
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Fallback to GET if HEAD is not allowed (405 HTTP error)
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"""
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def http_error_405(self, req, fp, code, msg, headers):
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fp.read()
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fp.close()
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newheaders = dict((k,v) for k,v in req.headers.items()
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if k.lower() not in ("content-length", "content-type"))
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return self.parent.open(compat_urllib_request.Request(req.get_full_url(),
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headers=newheaders,
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origin_req_host=req.get_origin_req_host(),
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unverifiable=True))
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# Build our opener
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opener = compat_urllib_request.OpenerDirector()
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for handler in [compat_urllib_request.HTTPHandler, compat_urllib_request.HTTPDefaultErrorHandler,
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HTTPMethodFallback, HEADRedirectHandler,
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compat_urllib_request.HTTPErrorProcessor, compat_urllib_request.HTTPSHandler]:
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opener.add_handler(handler())
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response = opener.open(HeadRequest(url))
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if response is None:
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raise ExtractorError(u'Invalid URL protocol')
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new_url = response.geturl()
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if url == new_url:
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return False
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self.report_following_redirect(new_url)
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return new_url
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def _real_extract(self, url):
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new_url = self._test_redirect(url)
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if new_url: return [self.url_result(new_url)]
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video_id = url.split('/')[-1]
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try:
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webpage = self._download_webpage(url, video_id)
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except ValueError:
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# since this is the last-resort InfoExtractor, if
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# this error is thrown, it'll be thrown here
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raise ExtractorError(u'Invalid URL: %s' % url)
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self.report_extraction(video_id)
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# Start with something easy: JW Player in SWFObject
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mobj = re.search(r'flashvars: [\'"](?:.*&)?file=(http[^\'"&]*)', webpage)
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if mobj is None:
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# Broaden the search a little bit
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mobj = re.search(r'[^A-Za-z0-9]?(?:file|source)=(http[^\'"&]*)', webpage)
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if mobj is None:
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# Broaden the search a little bit: JWPlayer JS loader
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mobj = re.search(r'[^A-Za-z0-9]?file:\s*["\'](http[^\'"&]*)', webpage)
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if mobj is None:
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# Try to find twitter cards info
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mobj = re.search(r'<meta (?:property|name)="twitter:player:stream" (?:content|value)="(.+?)"', webpage)
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if mobj is None:
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# We look for Open Graph info:
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# We have to match any number spaces between elements, some sites try to align them (eg.: statigr.am)
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m_video_type = re.search(r'<meta.*?property="og:video:type".*?content="video/(.*?)"', webpage)
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# We only look in og:video if the MIME type is a video, don't try if it's a Flash player:
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if m_video_type is not None:
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mobj = re.search(r'<meta.*?property="og:video".*?content="(.*?)"', webpage)
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if mobj is None:
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raise ExtractorError(u'Invalid URL: %s' % url)
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# It's possible that one of the regexes
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# matched, but returned an empty group:
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if mobj.group(1) is None:
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raise ExtractorError(u'Invalid URL: %s' % url)
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video_url = compat_urllib_parse.unquote(mobj.group(1))
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video_id = os.path.basename(video_url)
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# here's a fun little line of code for you:
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video_extension = os.path.splitext(video_id)[1][1:]
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video_id = os.path.splitext(video_id)[0]
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# it's tempting to parse this further, but you would
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# have to take into account all the variations like
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# Video Title - Site Name
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# Site Name | Video Title
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# Video Title - Tagline | Site Name
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# and so on and so forth; it's just not practical
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video_title = self._html_search_regex(r'<title>(.*)</title>',
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webpage, u'video title')
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# video uploader is domain name
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video_uploader = self._search_regex(r'(?:https?://)?([^/]*)/.*',
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url, u'video uploader')
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return [{
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'id': video_id,
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'url': video_url,
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'uploader': video_uploader,
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'upload_date': None,
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'title': video_title,
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'ext': video_extension,
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}]
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