removed dependency from lxml: added IDParser
This commit is contained in:
Filippo Valsorda - Campagna
parent
d6a9615347
commit
c6f45d4314
2 changed files with 155 additions and 76 deletions
131
youtube-dl
131
youtube-dl
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@ -15,6 +15,7 @@ __authors__ = (
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'Kevin Ngo',
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'Ori Avtalion',
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'shizeeg',
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'Filippo Valsorda',
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)
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__license__ = 'Public Domain'
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@ -66,11 +67,6 @@ try:
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except ImportError:
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from cgi import parse_qs
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try:
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import lxml.etree
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except ImportError:
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pass # Handled below
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try:
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import xml.etree.ElementTree
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except ImportError: # Python<2.5: Not officially supported, but let it slip
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@ -197,6 +193,69 @@ except ImportError: # Python <2.6, use trivialjson (https://github.com/phihag/tr
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raise ValueError('Extra data at end of input (index ' + str(i) + ' of ' + repr(s) + ': ' + repr(s[i:]) + ')')
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return res
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class IDParser(HTMLParser.HTMLParser):
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"""Modified HTMLParser that isolates a tag with the specified id"""
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def __init__(self, id):
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self.id = id
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self.result = None
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self.started = False
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self.depth = {}
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self.html = None
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self.watch_startpos = False
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HTMLParser.HTMLParser.__init__(self)
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def loads(self, html):
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self.html = html
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self.feed(html)
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self.close()
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def handle_starttag(self, tag, attrs):
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attrs = dict(attrs)
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if self.started:
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self.find_startpos(None)
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if 'id' in attrs and attrs['id'] == self.id:
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self.result = [tag]
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self.started = True
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self.watch_startpos = True
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if self.started:
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if not tag in self.depth: self.depth[tag] = 0
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self.depth[tag] += 1
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def handle_endtag(self, tag):
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if self.started:
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if tag in self.depth: self.depth[tag] -= 1
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if self.depth[self.result[0]] == 0:
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self.started = False
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self.result.append(self.getpos())
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def find_startpos(self, x):
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"""Needed to put the start position of the result (self.result[1])
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after the opening tag with the requested id"""
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if self.watch_startpos:
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self.watch_startpos = False
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self.result.append(self.getpos())
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handle_entityref = handle_charref = handle_data = handle_comment = \
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handle_decl = handle_pi = unknown_decl = find_startpos
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def get_result(self):
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if self.result == None: return None
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if len(self.result) != 3: return None
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lines = self.html.split('\n')
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lines = lines[self.result[1][0]-1:self.result[2][0]]
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lines[0] = lines[0][self.result[1][1]:]
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if len(lines) == 1:
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lines[-1] = lines[-1][:self.result[2][1]-self.result[1][1]]
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lines[-1] = lines[-1][:self.result[2][1]]
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return '\n'.join(lines).strip()
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def get_element_by_id(id, html):
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"""Return the content of the tag with the specified id in the passed HTML document"""
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parser = IDParser(id)
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parser.loads(html)
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return parser.get_result()
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def preferredencoding():
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"""Get preferred encoding.
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@ -241,6 +300,18 @@ def htmlentity_transform(matchobj):
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return (u'&%s;' % entity)
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def clean_html(html):
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"""Clean an HTML snippet into a readable string"""
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# Newline vs <br />
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html = html.replace('\n', ' ')
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html = re.sub('\s*<\s*br\s*/?\s*>\s*', '\n', html)
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# Strip html tags
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html = re.sub('<.*?>', '', html)
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# Replace html entities
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html = re.sub(ur'(?u)&(.+?);', htmlentity_transform, html)
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return html
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def sanitize_title(utitle):
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"""Sanitizes a video title so it could be used as part of a filename."""
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utitle = re.sub(ur'(?u)&(.+?);', htmlentity_transform, utitle)
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@ -1419,18 +1490,9 @@ class YoutubeIE(InfoExtractor):
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pass
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# description
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try:
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lxml.etree
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except NameError:
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video_description = u'No description available.'
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mobj = re.search(r'<meta name="description" content="(.*?)">', video_webpage)
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if mobj is not None:
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video_description = mobj.group(1).decode('utf-8')
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else:
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html_parser = lxml.etree.HTMLParser(encoding='utf-8')
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vwebpage_doc = lxml.etree.parse(StringIO.StringIO(video_webpage), html_parser)
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video_description = u''.join(vwebpage_doc.xpath('id("eow-description")//text()'))
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# TODO use another parser
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video_description = get_element_by_id("eow-description", video_webpage)
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if video_description: video_description = clean_html(video_description.decode('utf8'))
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else: video_description = ''
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# closed captions
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video_subtitles = None
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@ -2164,18 +2226,9 @@ class VimeoIE(InfoExtractor):
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video_thumbnail = config["video"]["thumbnail"]
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# Extract video description
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try:
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lxml.etree
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except NameError:
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video_description = u'No description available.'
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mobj = re.search(r'<meta name="description" content="(.*?)" />', webpage, re.MULTILINE)
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if mobj is not None:
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video_description = mobj.group(1)
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else:
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html_parser = lxml.etree.HTMLParser()
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vwebpage_doc = lxml.etree.parse(StringIO.StringIO(webpage), html_parser)
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video_description = u''.join(vwebpage_doc.xpath('id("description")//text()')).strip()
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# TODO use another parser
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video_description = get_element_by_id("description", webpage)
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if video_description: video_description = clean_html(video_description.decode('utf8'))
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else: video_description = ''
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# Extract upload date
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video_upload_date = u'NA'
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@ -3342,8 +3395,6 @@ class EscapistIE(InfoExtractor):
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self._downloader.to_screen(u'[escapist] %s: Downloading configuration' % showName)
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def _real_extract(self, url):
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htmlParser = HTMLParser.HTMLParser()
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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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@ -3359,11 +3410,11 @@ class EscapistIE(InfoExtractor):
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return
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descMatch = re.search('<meta name="description" content="([^"]*)"', webPage)
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description = htmlParser.unescape(descMatch.group(1))
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description = unescapeHTML(descMatch.group(1))
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imgMatch = re.search('<meta property="og:image" content="([^"]*)"', webPage)
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imgUrl = htmlParser.unescape(imgMatch.group(1))
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imgUrl = unescapeHTML(imgMatch.group(1))
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playerUrlMatch = re.search('<meta property="og:video" content="([^"]*)"', webPage)
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playerUrl = htmlParser.unescape(playerUrlMatch.group(1))
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playerUrl = unescapeHTML(playerUrlMatch.group(1))
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configUrlMatch = re.search('config=(.*)$', playerUrl)
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configUrl = urllib2.unquote(configUrlMatch.group(1))
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@ -3422,8 +3473,6 @@ class CollegeHumorIE(InfoExtractor):
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self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
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def _real_extract(self, url):
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htmlParser = HTMLParser.HTMLParser()
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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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@ -3494,8 +3543,6 @@ class XVideosIE(InfoExtractor):
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self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
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def _real_extract(self, url):
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htmlParser = HTMLParser.HTMLParser()
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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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@ -3584,8 +3631,6 @@ class SoundcloudIE(InfoExtractor):
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self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
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def _real_extract(self, url):
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htmlParser = HTMLParser.HTMLParser()
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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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@ -3673,8 +3718,6 @@ class InfoQIE(InfoExtractor):
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self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
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def _real_extract(self, url):
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htmlParser = HTMLParser.HTMLParser()
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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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@ -3908,8 +3951,6 @@ class StanfordOpenClassroomIE(InfoExtractor):
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except UnavailableVideoError, err:
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self._downloader.trouble(u'\nERROR: unable to download video')
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elif mobj.group('course'): # A course page
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unescapeHTML = HTMLParser.HTMLParser().unescape
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course = mobj.group('course')
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info = {
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'id': _simplify_title(course),
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@ -3946,8 +3987,6 @@ class StanfordOpenClassroomIE(InfoExtractor):
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assert entry['type'] == 'reference'
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self.extract(entry['url'])
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else: # Root page
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unescapeHTML = HTMLParser.HTMLParser().unescape
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info = {
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'id': 'Stanford OpenClassroom',
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'type': 'playlist',
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@ -67,11 +67,6 @@ try:
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except ImportError:
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from cgi import parse_qs
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try:
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import lxml.etree
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except ImportError:
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pass # Handled below
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try:
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import xml.etree.ElementTree
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except ImportError: # Python<2.5: Not officially supported, but let it slip
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@ -198,6 +193,69 @@ except ImportError: # Python <2.6, use trivialjson (https://github.com/phihag/tr
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raise ValueError('Extra data at end of input (index ' + str(i) + ' of ' + repr(s) + ': ' + repr(s[i:]) + ')')
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return res
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class IDParser(HTMLParser.HTMLParser):
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"""Modified HTMLParser that isolates a tag with the specified id"""
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def __init__(self, id):
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self.id = id
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self.result = None
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self.started = False
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self.depth = {}
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self.html = None
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self.watch_startpos = False
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HTMLParser.HTMLParser.__init__(self)
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def loads(self, html):
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self.html = html
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self.feed(html)
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self.close()
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def handle_starttag(self, tag, attrs):
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attrs = dict(attrs)
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if self.started:
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self.find_startpos(None)
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if 'id' in attrs and attrs['id'] == self.id:
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self.result = [tag]
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self.started = True
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self.watch_startpos = True
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if self.started:
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if not tag in self.depth: self.depth[tag] = 0
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self.depth[tag] += 1
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def handle_endtag(self, tag):
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if self.started:
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if tag in self.depth: self.depth[tag] -= 1
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if self.depth[self.result[0]] == 0:
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self.started = False
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self.result.append(self.getpos())
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def find_startpos(self, x):
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"""Needed to put the start position of the result (self.result[1])
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after the opening tag with the requested id"""
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if self.watch_startpos:
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self.watch_startpos = False
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self.result.append(self.getpos())
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handle_entityref = handle_charref = handle_data = handle_comment = \
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handle_decl = handle_pi = unknown_decl = find_startpos
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def get_result(self):
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if self.result == None: return None
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if len(self.result) != 3: return None
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lines = self.html.split('\n')
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lines = lines[self.result[1][0]-1:self.result[2][0]]
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lines[0] = lines[0][self.result[1][1]:]
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if len(lines) == 1:
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lines[-1] = lines[-1][:self.result[2][1]-self.result[1][1]]
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lines[-1] = lines[-1][:self.result[2][1]]
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return '\n'.join(lines).strip()
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def get_element_by_id(id, html):
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"""Return the content of the tag with the specified id in the passed HTML document"""
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parser = IDParser(id)
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parser.loads(html)
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return parser.get_result()
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def preferredencoding():
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"""Get preferred encoding.
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@ -246,7 +304,7 @@ def clean_html(html):
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"""Clean an HTML snippet into a readable string"""
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# Newline vs <br />
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html = html.replace('\n', ' ')
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html = re.sub('<\s*br\s*/?\s*>', '\n', html)
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html = re.sub('\s*<\s*br\s*/?\s*>\s*', '\n', html)
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# Strip html tags
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html = re.sub('<.*?>', '', html)
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# Replace html entities
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@ -1432,18 +1490,9 @@ class YoutubeIE(InfoExtractor):
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pass
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# description
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try:
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lxml.etree
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except NameError:
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video_description = u'No description available.'
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mobj = re.search(r'<meta name="description" content="(.*?)">', video_webpage)
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if mobj is not None:
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video_description = mobj.group(1).decode('utf-8')
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else:
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html_parser = lxml.etree.HTMLParser(encoding='utf-8')
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vwebpage_doc = lxml.etree.parse(StringIO.StringIO(video_webpage), html_parser)
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video_description = u''.join(vwebpage_doc.xpath('id("eow-description")//text()'))
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# TODO use another parser
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video_description = get_element_by_id("eow-description", video_webpage)
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if video_description: video_description = clean_html(video_description.decode('utf8'))
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else: video_description = ''
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# closed captions
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video_subtitles = None
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@ -2177,18 +2226,9 @@ class VimeoIE(InfoExtractor):
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video_thumbnail = config["video"]["thumbnail"]
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# Extract video description
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try:
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lxml.etree
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except NameError:
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video_description = u'No description available.'
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mobj = re.search(r'<meta name="description" content="(.*?)" />', webpage, re.MULTILINE)
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if mobj is not None:
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video_description = mobj.group(1)
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else:
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html_parser = lxml.etree.HTMLParser()
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vwebpage_doc = lxml.etree.parse(StringIO.StringIO(webpage), html_parser)
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video_description = u''.join(vwebpage_doc.xpath('id("description")//text()')).strip()
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# TODO use another parser
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video_description = get_element_by_id("description", webpage)
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if video_description: video_description = clean_html(video_description.decode('utf8'))
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else: video_description = ''
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# Extract upload date
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video_upload_date = u'NA'
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