mirror of
https://github.com/l1ving/youtube-dl
synced 2024-12-31 00:32:52 +08:00
Download videos after extracting information
This is achieved by letting the InfoExtractors instruct its downloader to process the information dictionary just after extracting the information. As a consequence, some code is simplified too.
This commit is contained in:
Ricardo Garcia
parent
147753eb33
commit
6f21f68629
99
youtube-dl
99
youtube-dl
@ -301,21 +301,8 @@ class FileDownloader(object):
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# Suitable InfoExtractor found
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suitable_found = True
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# Extract information from URL
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all_results = ie.extract(url)
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results = [x for x in all_results if x is not None]
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# See if there were problems extracting any information
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if len(results) != len(all_results):
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self.trouble()
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# Two results could go to the same file
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if len(results) > 1 and self.fixed_template():
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raise SameFileError(self.params['outtmpl'])
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# Process each result
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for result in results:
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self.process_info(result)
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# Extract information from URL and process it
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ie.extract(url)
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# Suitable InfoExtractor had been found; go to next URL
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break
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@ -508,7 +495,7 @@ class YoutubeIE(InfoExtractor):
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else:
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raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
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except (IOError, netrc.NetrcParseError), err:
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self._downloader.trouble(u'WARNING: parsing .netrc: %s' % str(err))
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self._downloader.to_stderr(u'WARNING: parsing .netrc: %s' % str(err))
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return
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# Set language
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@ -517,7 +504,7 @@ class YoutubeIE(InfoExtractor):
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self.report_lang()
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urllib2.urlopen(request).read()
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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self._downloader.trouble(u'WARNING: unable to set language: %s' % str(err))
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self._downloader.to_stderr(u'WARNING: unable to set language: %s' % str(err))
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return
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# No authentication to be performed
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@ -537,10 +524,10 @@ class YoutubeIE(InfoExtractor):
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self.report_login()
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login_results = urllib2.urlopen(request).read()
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if re.search(r'(?i)<form[^>]* name="loginForm"', login_results) is not None:
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self._downloader.trouble(u'WARNING: unable to log in: bad username or password')
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self._downloader.to_stderr(u'WARNING: unable to log in: bad username or password')
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return
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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self._downloader.trouble(u'WARNING: unable to log in: %s' % str(err))
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self._downloader.to_stderr(u'WARNING: unable to log in: %s' % str(err))
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return
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# Confirm age
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@ -561,7 +548,7 @@ class YoutubeIE(InfoExtractor):
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mobj = re.match(self._VALID_URL, url)
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if mobj is None:
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self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
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return [None]
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return
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video_id = mobj.group(2)
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# Downloader parameters
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@ -587,14 +574,14 @@ class YoutubeIE(InfoExtractor):
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video_webpage = urllib2.urlopen(request).read()
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
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return [None]
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return
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self.report_information_extraction(video_id)
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# "t" param
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mobj = re.search(r', "t": "([^"]+)"', video_webpage)
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if mobj is None:
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self._downloader.trouble(u'ERROR: unable to extract "t" parameter')
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return [None]
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return
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video_real_url = 'http://www.youtube.com/get_video?video_id=%s&t=%s&el=detailpage&ps=' % (video_id, mobj.group(1))
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if format_param is not None:
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video_real_url = '%s&fmt=%s' % (video_real_url, format_param)
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@ -604,14 +591,14 @@ class YoutubeIE(InfoExtractor):
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mobj = re.search(r"var watchUsername = '([^']+)';", video_webpage)
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if mobj is None:
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self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
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return [None]
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return
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video_uploader = mobj.group(1)
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# title
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mobj = re.search(r'(?im)<title>YouTube - ([^<]*)</title>', video_webpage)
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if mobj is None:
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self._downloader.trouble(u'ERROR: unable to extract video title')
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return [None]
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return
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video_title = mobj.group(1).decode('utf-8')
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video_title = re.sub(ur'(?u)&(.+?);', self.htmlentity_transform, video_title)
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video_title = video_title.replace(os.sep, u'%')
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@ -621,14 +608,14 @@ class YoutubeIE(InfoExtractor):
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simple_title = simple_title.strip(ur'_')
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# Process video information
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return [{
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self._downloader.process_info({
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'id': video_id.decode('utf-8'),
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'url': video_real_url.decode('utf-8'),
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'uploader': video_uploader.decode('utf-8'),
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'title': video_title,
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'stitle': simple_title,
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'ext': video_extension.decode('utf-8'),
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}]
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})
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class MetacafeIE(InfoExtractor):
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"""Information Extractor for metacafe.com."""
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@ -689,14 +676,15 @@ class MetacafeIE(InfoExtractor):
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mobj = re.match(self._VALID_URL, url)
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if mobj is None:
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self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
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return [None]
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return
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video_id = mobj.group(1)
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# Check if video comes from YouTube
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mobj2 = re.match(r'^yt-(.*)$', video_id)
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if mobj2 is not None:
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return self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % mobj2.group(1))
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self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % mobj2.group(1))
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return
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simple_title = mobj.group(2).decode('utf-8')
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video_extension = 'flv'
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@ -708,20 +696,20 @@ class MetacafeIE(InfoExtractor):
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webpage = urllib2.urlopen(request).read()
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % str(err))
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return [None]
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return
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# Extract URL, uploader and title from webpage
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self.report_extraction(video_id)
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mobj = re.search(r'(?m)"mediaURL":"(http.*?\.flv)"', webpage)
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if mobj is None:
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self._downloader.trouble(u'ERROR: unable to extract media URL')
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return [None]
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return
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mediaURL = mobj.group(1).replace('\\', '')
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mobj = re.search(r'(?m)"gdaKey":"(.*?)"', webpage)
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if mobj is None:
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self._downloader.trouble(u'ERROR: unable to extract gdaKey')
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return [None]
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return
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gdaKey = mobj.group(1)
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video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
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@ -729,24 +717,24 @@ class MetacafeIE(InfoExtractor):
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mobj = re.search(r'(?im)<title>(.*) - Video</title>', webpage)
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if mobj is None:
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self._downloader.trouble(u'ERROR: unable to extract title')
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return [None]
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return
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video_title = mobj.group(1).decode('utf-8')
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mobj = re.search(r'(?m)<li id="ChnlUsr">.*?Submitter:<br />(.*?)</li>', webpage)
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if mobj is None:
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self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
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return [None]
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return
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video_uploader = re.sub(r'<.*?>', '', mobj.group(1))
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# Return information
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return [{
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# Process video information
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self._downloader.process_info({
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'id': video_id.decode('utf-8'),
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'url': video_url.decode('utf-8'),
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'uploader': video_uploader.decode('utf-8'),
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'title': video_title,
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'stitle': simple_title,
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'ext': video_extension.decode('utf-8'),
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}]
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})
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class YoutubeSearchIE(InfoExtractor):
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@ -777,26 +765,30 @@ class YoutubeSearchIE(InfoExtractor):
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mobj = re.match(self._VALID_QUERY, query)
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if mobj is None:
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self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
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return [None]
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return
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prefix, query = query.split(':')
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prefix = prefix[8:]
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if prefix == '':
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return self._download_n_results(query, 1)
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self._download_n_results(query, 1)
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return
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elif prefix == 'all':
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return self._download_n_results(query, self._max_youtube_results)
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self._download_n_results(query, self._max_youtube_results)
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return
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else:
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try:
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n = int(prefix)
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if n <= 0:
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self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
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return [None]
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return
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elif n > self._max_youtube_results:
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self._downloader.trouble(u'WARNING: ytsearch returns max %i results (you requested %i)' % (self._max_youtube_results, n))
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self._downloader.to_stderr(u'WARNING: ytsearch returns max %i results (you requested %i)' % (self._max_youtube_results, n))
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n = self._max_youtube_results
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return self._download_n_results(query, n)
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self._download_n_results(query, n)
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return
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except ValueError: # parsing prefix as int fails
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return self._download_n_results(query, 1)
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self._download_n_results(query, 1)
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return
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def _download_n_results(self, query, n):
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"""Downloads a specified number of results for a query"""
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@ -813,7 +805,7 @@ class YoutubeSearchIE(InfoExtractor):
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page = urllib2.urlopen(request).read()
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
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return [None]
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return
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# Extract video identifiers
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for mobj in re.finditer(self._VIDEO_INDICATOR, page):
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@ -823,16 +815,14 @@ class YoutubeSearchIE(InfoExtractor):
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already_seen.add(video_id)
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if len(video_ids) == n:
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# Specified n videos reached
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information = []
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for id in video_ids:
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information.extend(self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id))
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return information
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self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
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return
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if self._MORE_PAGES_INDICATOR not in page:
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information = []
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for id in video_ids:
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information.extend(self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id))
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return information
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self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
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return
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pagenum = pagenum + 1
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@ -865,7 +855,7 @@ class YoutubePlaylistIE(InfoExtractor):
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mobj = re.match(self._VALID_URL, url)
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if mobj is None:
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self._downloader.trouble(u'ERROR: invalid url: %s' % url)
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return [None]
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return
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# Download playlist pages
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playlist_id = mobj.group(1)
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@ -879,7 +869,7 @@ class YoutubePlaylistIE(InfoExtractor):
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page = urllib2.urlopen(request).read()
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
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return [None]
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return
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# Extract video identifiers
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ids_in_page = []
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@ -892,10 +882,9 @@ class YoutubePlaylistIE(InfoExtractor):
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break
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pagenum = pagenum + 1
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information = []
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for id in video_ids:
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information.extend(self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id))
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return information
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self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
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return
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class PostProcessor(object):
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"""Post Processor class.
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