feedparser.py
7d91adf2
 #!/usr/bin/env python
 """Universal feed parser
 
 Handles RSS 0.9x, RSS 1.0, RSS 2.0, CDF, Atom 0.3, and Atom 1.0 feeds
 
 Visit http://feedparser.org/ for the latest version
 Visit http://feedparser.org/docs/ for the latest documentation
 
 Required: Python 2.1 or later
 Recommended: Python 2.3 or later
 Recommended: CJKCodecs and iconv_codec <http://cjkpython.i18n.org/>
 """
 
 __version__ = "4.2-pre-" + "$Revision: 291 $"[11:14] + "-svn"
 __license__ = """Copyright (c) 2002-2008, Mark Pilgrim, All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
 
 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE."""
 __author__ = "Mark Pilgrim <http://diveintomark.org/>"
 __contributors__ = ["Jason Diamond <http://injektilo.org/>",
                     "John Beimler <http://john.beimler.org/>",
                     "Fazal Majid <http://www.majid.info/mylos/weblog/>",
                     "Aaron Swartz <http://aaronsw.com/>",
                     "Kevin Marks <http://epeus.blogspot.com/>",
                     "Sam Ruby <http://intertwingly.net/>"]
 _debug = 0
 
 # HTTP "User-Agent" header to send to servers when downloading feeds.
 # If you are embedding feedparser in a larger application, you should
 # change this to your application name and URL.
 USER_AGENT = "UniversalFeedParser/%s +http://feedparser.org/" % __version__
 
 # HTTP "Accept" header to send to servers when downloading feeds.  If you don't
 # want to send an Accept header, set this to None.
 ACCEPT_HEADER = "application/atom+xml,application/rdf+xml,application/rss+xml,application/x-netcdf,application/xml;q=0.9,text/xml;q=0.2,*/*;q=0.1"
 
 # List of preferred XML parsers, by SAX driver name.  These will be tried first,
 # but if they're not installed, Python will keep searching through its own list
 # of pre-installed parsers until it finds one that supports everything we need.
 PREFERRED_XML_PARSERS = ["drv_libxml2"]
 
 # If you want feedparser to automatically run HTML markup through HTML Tidy, set
 # this to 1.  Requires mxTidy <http://www.egenix.com/files/python/mxTidy.html>
 # or utidylib <http://utidylib.berlios.de/>.
 TIDY_MARKUP = 0
 
 # List of Python interfaces for HTML Tidy, in order of preference.  Only useful
 # if TIDY_MARKUP = 1
 PREFERRED_TIDY_INTERFACES = ["uTidy", "mxTidy"]
 
 # If you want feedparser to automatically resolve all relative URIs, set this
 # to 1.
 RESOLVE_RELATIVE_URIS = 1
 
 # If you want feedparser to automatically sanitize all potentially unsafe
 # HTML content, set this to 1.
 SANITIZE_HTML = 1
 
 # ---------- required modules (should come with any Python distribution) ----------
 import sgmllib, re, sys, copy, urlparse, time, rfc822, types, cgi, urllib, urllib2
 try:
     from cStringIO import StringIO as _StringIO
 except:
     from StringIO import StringIO as _StringIO
 
 # ---------- optional modules (feedparser will work without these, but with reduced functionality) ----------
 
 # gzip is included with most Python distributions, but may not be available if you compiled your own
 try:
     import gzip
 except:
     gzip = None
 try:
     import zlib
 except:
     zlib = None
 
 # If a real XML parser is available, feedparser will attempt to use it.  feedparser has
 # been tested with the built-in SAX parser, PyXML, and libxml2.  On platforms where the
 # Python distribution does not come with an XML parser (such as Mac OS X 10.2 and some
 # versions of FreeBSD), feedparser will quietly fall back on regex-based parsing.
 try:
     import xml.sax
     xml.sax.make_parser(PREFERRED_XML_PARSERS) # test for valid parsers
     from xml.sax.saxutils import escape as _xmlescape
     _XML_AVAILABLE = 1
 except:
     _XML_AVAILABLE = 0
     def _xmlescape(data,entities={}):
         data = data.replace('&', '&amp;')
         data = data.replace('>', '&gt;')
         data = data.replace('<', '&lt;')
         for char, entity in entities:
             data = data.replace(char, entity)
         return data
 
 # base64 support for Atom feeds that contain embedded binary data
 try:
     import base64, binascii
 except:
     base64 = binascii = None
 
 # cjkcodecs and iconv_codec provide support for more character encodings.
 # Both are available from http://cjkpython.i18n.org/
 try:
     import cjkcodecs.aliases
 except:
     pass
 try:
     import iconv_codec
 except:
     pass
 
 # chardet library auto-detects character encodings
 # Download from http://chardet.feedparser.org/
 try:
     import chardet
     if _debug:
         import chardet.constants
         chardet.constants._debug = 1
 except:
     chardet = None
 
 # reversable htmlentitydefs mappings for Python 2.2
 try:
   from htmlentitydefs import name2codepoint, codepoint2name
 except:
   import htmlentitydefs
   name2codepoint={}
   codepoint2name={}
   for (name,codepoint) in htmlentitydefs.entitydefs.iteritems():
     if codepoint.startswith('&#'): codepoint=unichr(int(codepoint[2:-1]))
     name2codepoint[name]=ord(codepoint)
     codepoint2name[ord(codepoint)]=name
 
 # BeautifulSoup parser used for parsing microformats from embedded HTML content
 # http://www.crummy.com/software/BeautifulSoup/
 # feedparser is tested with BeautifulSoup 3.0.x, but it might work with the
 # older 2.x series.  If it doesn't, and you can figure out why, I'll accept a
 # patch and modify the compatibility statement accordingly.
 try:
     import BeautifulSoup
 except:
     BeautifulSoup = None
 
 # ---------- don't touch these ----------
 class ThingsNobodyCaresAboutButMe(Exception): pass
 class CharacterEncodingOverride(ThingsNobodyCaresAboutButMe): pass
 class CharacterEncodingUnknown(ThingsNobodyCaresAboutButMe): pass
 class NonXMLContentType(ThingsNobodyCaresAboutButMe): pass
 class UndeclaredNamespace(Exception): pass
 
 sgmllib.tagfind = re.compile('[a-zA-Z][-_.:a-zA-Z0-9]*')
 sgmllib.special = re.compile('<!')
 sgmllib.charref = re.compile('&#(\d+|x[0-9a-fA-F]+);')
 
 if sgmllib.endbracket.search(' <').start(0):
     class EndBracketMatch:
         endbracket = re.compile('''([^'"<>]|"[^"]*"(?=>|/|\s|\w+=)|'[^']*'(?=>|/|\s|\w+=))*(?=[<>])|.*?(?=[<>])''')
         def search(self,string,index=0):
             self.match = self.endbracket.match(string,index)
             if self.match: return self
         def start(self,n):
             return self.match.end(n)
     sgmllib.endbracket = EndBracketMatch()
 
 SUPPORTED_VERSIONS = {'': 'unknown',
                       'rss090': 'RSS 0.90',
                       'rss091n': 'RSS 0.91 (Netscape)',
                       'rss091u': 'RSS 0.91 (Userland)',
                       'rss092': 'RSS 0.92',
                       'rss093': 'RSS 0.93',
                       'rss094': 'RSS 0.94',
                       'rss20': 'RSS 2.0',
                       'rss10': 'RSS 1.0',
                       'rss': 'RSS (unknown version)',
                       'atom01': 'Atom 0.1',
                       'atom02': 'Atom 0.2',
                       'atom03': 'Atom 0.3',
                       'atom10': 'Atom 1.0',
                       'atom': 'Atom (unknown version)',
                       'cdf': 'CDF',
                       'hotrss': 'Hot RSS'
                       }
 
 try:
     UserDict = dict
 except NameError:
     # Python 2.1 does not have dict
     from UserDict import UserDict
     def dict(aList):
         rc = {}
         for k, v in aList:
             rc[k] = v
         return rc
 
 class FeedParserDict(UserDict):
     keymap = {'channel': 'feed',
               'items': 'entries',
               'guid': 'id',
               'date': 'updated',
               'date_parsed': 'updated_parsed',
               'description': ['subtitle', 'summary'],
               'url': ['href'],
               'modified': 'updated',
               'modified_parsed': 'updated_parsed',
               'issued': 'published',
               'issued_parsed': 'published_parsed',
               'copyright': 'rights',
               'copyright_detail': 'rights_detail',
               'tagline': 'subtitle',
               'tagline_detail': 'subtitle_detail'}
     def __getitem__(self, key):
         if key == 'category':
             return UserDict.__getitem__(self, 'tags')[0]['term']
         if key == 'enclosures':
             norel = lambda link: FeedParserDict([(name,value) for (name,value) in link.items() if name!='rel'])
             return [norel(link) for link in UserDict.__getitem__(self, 'links') if link['rel']=='enclosure']
         if key == 'license':
             for link in UserDict.__getitem__(self, 'links'):
                 if link['rel']=='license' and link.has_key('href'):
                     return link['href']
         if key == 'categories':
             return [(tag['scheme'], tag['term']) for tag in UserDict.__getitem__(self, 'tags')]
         realkey = self.keymap.get(key, key)
         if type(realkey) == types.ListType:
             for k in realkey:
                 if UserDict.has_key(self, k):
                     return UserDict.__getitem__(self, k)
         if UserDict.has_key(self, key):
             return UserDict.__getitem__(self, key)
         return UserDict.__getitem__(self, realkey)
 
     def __setitem__(self, key, value):
         for k in self.keymap.keys():
             if key == k:
                 key = self.keymap[k]
                 if type(key) == types.ListType:
                     key = key[0]
         return UserDict.__setitem__(self, key, value)
 
     def get(self, key, default=None):
         if self.has_key(key):
             return self[key]
         else:
             return default
 
     def setdefault(self, key, value):
         if not self.has_key(key):
             self[key] = value
         return self[key]
 
     def has_key(self, key):
         try:
             return hasattr(self, key) or UserDict.has_key(self, key)
         except AttributeError:
             return False
 
     def __getattr__(self, key):
         try:
             return self.__dict__[key]
         except KeyError:
             pass
         try:
             assert not key.startswith('_')
             return self.__getitem__(key)
         except:
             raise AttributeError, "object has no attribute '%s'" % key
 
     def __setattr__(self, key, value):
         if key.startswith('_') or key == 'data':
             self.__dict__[key] = value
         else:
             return self.__setitem__(key, value)
 
     def __contains__(self, key):
         return self.has_key(key)
 
 def zopeCompatibilityHack():
     global FeedParserDict
     del FeedParserDict
     def FeedParserDict(aDict=None):
         rc = {}
         if aDict:
             rc.update(aDict)
         return rc
 
 _ebcdic_to_ascii_map = None
 def _ebcdic_to_ascii(s):
     global _ebcdic_to_ascii_map
     if not _ebcdic_to_ascii_map:
         emap = (
             0,1,2,3,156,9,134,127,151,141,142,11,12,13,14,15,
             16,17,18,19,157,133,8,135,24,25,146,143,28,29,30,31,
             128,129,130,131,132,10,23,27,136,137,138,139,140,5,6,7,
             144,145,22,147,148,149,150,4,152,153,154,155,20,21,158,26,
             32,160,161,162,163,164,165,166,167,168,91,46,60,40,43,33,
             38,169,170,171,172,173,174,175,176,177,93,36,42,41,59,94,
             45,47,178,179,180,181,182,183,184,185,124,44,37,95,62,63,
             186,187,188,189,190,191,192,193,194,96,58,35,64,39,61,34,
             195,97,98,99,100,101,102,103,104,105,196,197,198,199,200,201,
             202,106,107,108,109,110,111,112,113,114,203,204,205,206,207,208,
             209,126,115,116,117,118,119,120,121,122,210,211,212,213,214,215,
             216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,
             123,65,66,67,68,69,70,71,72,73,232,233,234,235,236,237,
             125,74,75,76,77,78,79,80,81,82,238,239,240,241,242,243,
             92,159,83,84,85,86,87,88,89,90,244,245,246,247,248,249,
             48,49,50,51,52,53,54,55,56,57,250,251,252,253,254,255
             )
         import string
         _ebcdic_to_ascii_map = string.maketrans( \
             ''.join(map(chr, range(256))), ''.join(map(chr, emap)))
     return s.translate(_ebcdic_to_ascii_map)
 
 _cp1252 = {
   unichr(128): unichr(8364), # euro sign
   unichr(130): unichr(8218), # single low-9 quotation mark
   unichr(131): unichr( 402), # latin small letter f with hook
   unichr(132): unichr(8222), # double low-9 quotation mark
   unichr(133): unichr(8230), # horizontal ellipsis
   unichr(134): unichr(8224), # dagger
   unichr(135): unichr(8225), # double dagger
   unichr(136): unichr( 710), # modifier letter circumflex accent
   unichr(137): unichr(8240), # per mille sign
   unichr(138): unichr( 352), # latin capital letter s with caron
   unichr(139): unichr(8249), # single left-pointing angle quotation mark
   unichr(140): unichr( 338), # latin capital ligature oe
   unichr(142): unichr( 381), # latin capital letter z with caron
   unichr(145): unichr(8216), # left single quotation mark
   unichr(146): unichr(8217), # right single quotation mark
   unichr(147): unichr(8220), # left double quotation mark
   unichr(148): unichr(8221), # right double quotation mark
   unichr(149): unichr(8226), # bullet
   unichr(150): unichr(8211), # en dash
   unichr(151): unichr(8212), # em dash
   unichr(152): unichr( 732), # small tilde
   unichr(153): unichr(8482), # trade mark sign
   unichr(154): unichr( 353), # latin small letter s with caron
   unichr(155): unichr(8250), # single right-pointing angle quotation mark
   unichr(156): unichr( 339), # latin small ligature oe
   unichr(158): unichr( 382), # latin small letter z with caron
   unichr(159): unichr( 376)} # latin capital letter y with diaeresis
 
 _urifixer = re.compile('^([A-Za-z][A-Za-z0-9+-.]*://)(/*)(.*?)')
 def _urljoin(base, uri):
     uri = _urifixer.sub(r'\1\3', uri)
     try:
         return urlparse.urljoin(base, uri)
     except:
         uri = urlparse.urlunparse([urllib.quote(part) for part in urlparse.urlparse(uri)])
         return urlparse.urljoin(base, uri)
 
 class _FeedParserMixin:
     namespaces = {'': '',
                   'http://backend.userland.com/rss': '',
                   'http://blogs.law.harvard.edu/tech/rss': '',
                   'http://purl.org/rss/1.0/': '',
                   'http://my.netscape.com/rdf/simple/0.9/': '',
                   'http://example.com/newformat#': '',
                   'http://example.com/necho': '',
                   'http://purl.org/echo/': '',
                   'uri/of/echo/namespace#': '',
                   'http://purl.org/pie/': '',
                   'http://purl.org/atom/ns#': '',
                   'http://www.w3.org/2005/Atom': '',
                   'http://purl.org/rss/1.0/modules/rss091#': '',
 
                   'http://webns.net/mvcb/':                               'admin',
                   'http://purl.org/rss/1.0/modules/aggregation/':         'ag',
                   'http://purl.org/rss/1.0/modules/annotate/':            'annotate',
                   'http://media.tangent.org/rss/1.0/':                    'audio',
                   'http://backend.userland.com/blogChannelModule':        'blogChannel',
                   'http://web.resource.org/cc/':                          'cc',
                   'http://backend.userland.com/creativeCommonsRssModule': 'creativeCommons',
                   'http://purl.org/rss/1.0/modules/company':              'co',
                   'http://purl.org/rss/1.0/modules/content/':             'content',
                   'http://my.theinfo.org/changed/1.0/rss/':               'cp',
                   'http://purl.org/dc/elements/1.1/':                     'dc',
                   'http://purl.org/dc/terms/':                            'dcterms',
                   'http://purl.org/rss/1.0/modules/email/':               'email',
                   'http://purl.org/rss/1.0/modules/event/':               'ev',
                   'http://rssnamespace.org/feedburner/ext/1.0':           'feedburner',
                   'http://freshmeat.net/rss/fm/':                         'fm',
                   'http://xmlns.com/foaf/0.1/':                           'foaf',
                   'http://www.w3.org/2003/01/geo/wgs84_pos#':             'geo',
                   'http://postneo.com/icbm/':                             'icbm',
                   'http://purl.org/rss/1.0/modules/image/':               'image',
                   'http://www.itunes.com/DTDs/PodCast-1.0.dtd':           'itunes',
                   'http://example.com/DTDs/PodCast-1.0.dtd':              'itunes',
                   'http://purl.org/rss/1.0/modules/link/':                'l',
                   'http://search.yahoo.com/mrss':                         'media',
                   'http://madskills.com/public/xml/rss/module/pingback/': 'pingback',
                   'http://prismstandard.org/namespaces/1.2/basic/':       'prism',
                   'http://www.w3.org/1999/02/22-rdf-syntax-ns#':          'rdf',
                   'http://www.w3.org/2000/01/rdf-schema#':                'rdfs',
                   'http://purl.org/rss/1.0/modules/reference/':           'ref',
                   'http://purl.org/rss/1.0/modules/richequiv/':           'reqv',
                   'http://purl.org/rss/1.0/modules/search/':              'search',
                   'http://purl.org/rss/1.0/modules/slash/':               'slash',
                   'http://schemas.xmlsoap.org/soap/envelope/':            'soap',
                   'http://purl.org/rss/1.0/modules/servicestatus/':       'ss',
                   'http://hacks.benhammersley.com/rss/streaming/':        'str',
                   'http://purl.org/rss/1.0/modules/subscription/':        'sub',
                   'http://purl.org/rss/1.0/modules/syndication/':         'sy',
                   'http://schemas.pocketsoap.com/rss/myDescModule/':      'szf',
                   'http://purl.org/rss/1.0/modules/taxonomy/':            'taxo',
                   'http://purl.org/rss/1.0/modules/threading/':           'thr',
                   'http://purl.org/rss/1.0/modules/textinput/':           'ti',
                   'http://madskills.com/public/xml/rss/module/trackback/':'trackback',
                   'http://wellformedweb.org/commentAPI/':                 'wfw',
                   'http://purl.org/rss/1.0/modules/wiki/':                'wiki',
                   'http://www.w3.org/1999/xhtml':                         'xhtml',
                   'http://www.w3.org/1999/xlink':                         'xlink',
                   'http://www.w3.org/XML/1998/namespace':                 'xml'
 }
     _matchnamespaces = {}
 
     can_be_relative_uri = ['link', 'id', 'wfw_comment', 'wfw_commentrss', 'docs', 'url', 'href', 'comments', 'icon', 'logo']
     can_contain_relative_uris = ['content', 'title', 'summary', 'info', 'tagline', 'subtitle', 'copyright', 'rights', 'description']
     can_contain_dangerous_markup = ['content', 'title', 'summary', 'info', 'tagline', 'subtitle', 'copyright', 'rights', 'description']
     html_types = ['text/html', 'application/xhtml+xml']
 
     def __init__(self, baseuri=None, baselang=None, encoding='utf-8'):
         if _debug: sys.stderr.write('initializing FeedParser\n')
         if not self._matchnamespaces:
             for k, v in self.namespaces.items():
                 self._matchnamespaces[k.lower()] = v
         self.feeddata = FeedParserDict() # feed-level data
         self.encoding = encoding # character encoding
         self.entries = [] # list of entry-level data
         self.version = '' # feed type/version, see SUPPORTED_VERSIONS
         self.namespacesInUse = {} # dictionary of namespaces defined by the feed
 
         # the following are used internally to track state;
         # this is really out of control and should be refactored
         self.infeed = 0
         self.inentry = 0
         self.incontent = 0
         self.intextinput = 0
         self.inimage = 0
         self.inauthor = 0
         self.incontributor = 0
         self.inpublisher = 0
         self.insource = 0
         self.sourcedata = FeedParserDict()
         self.contentparams = FeedParserDict()
         self._summaryKey = None
         self.namespacemap = {}
         self.elementstack = []
         self.basestack = []
         self.langstack = []
         self.baseuri = baseuri or ''
         self.lang = baselang or None
         self.svgOK = 0
         self.hasTitle = 0
         if baselang:
             self.feeddata['language'] = baselang.replace('_','-')
 
     def unknown_starttag(self, tag, attrs):
         if _debug: sys.stderr.write('start %s with %s\n' % (tag, attrs))
         # normalize attrs
         attrs = [(k.lower(), v) for k, v in attrs]
         attrs = [(k, k in ('rel', 'type') and v.lower() or v) for k, v in attrs]
 
         # track xml:base and xml:lang
         attrsD = dict(attrs)
         baseuri = attrsD.get('xml:base', attrsD.get('base')) or self.baseuri
         if type(baseuri) != type(u''):
             try:
                 baseuri = unicode(baseuri, self.encoding)
             except:
                 baseuri = unicode(baseuri, 'iso-8859-1')
         self.baseuri = _urljoin(self.baseuri, baseuri)
         lang = attrsD.get('xml:lang', attrsD.get('lang'))
         if lang == '':
             # xml:lang could be explicitly set to '', we need to capture that
             lang = None
         elif lang is None:
             # if no xml:lang is specified, use parent lang
             lang = self.lang
         if lang:
             if tag in ('feed', 'rss', 'rdf:RDF'):
                 self.feeddata['language'] = lang.replace('_','-')
         self.lang = lang
         self.basestack.append(self.baseuri)
         self.langstack.append(lang)
 
         # track namespaces
         for prefix, uri in attrs:
             if prefix.startswith('xmlns:'):
                 self.trackNamespace(prefix[6:], uri)
             elif prefix == 'xmlns':
                 self.trackNamespace(None, uri)
 
         # track inline content
         if self.incontent and self.contentparams.has_key('type') and not self.contentparams.get('type', 'xml').endswith('xml'):
             if tag in ['xhtml:div', 'div']: return # typepad does this 10/2007
             # element declared itself as escaped markup, but it isn't really
             self.contentparams['type'] = 'application/xhtml+xml'
         if self.incontent and self.contentparams.get('type') == 'application/xhtml+xml':
             if tag.find(':') <> -1:
                 prefix, tag = tag.split(':', 1)
                 namespace = self.namespacesInUse.get(prefix, '')
                 if tag=='math' and namespace=='http://www.w3.org/1998/Math/MathML':
                     attrs.append(('xmlns',namespace))
                 if tag=='svg' and namespace=='http://www.w3.org/2000/svg':
                     attrs.append(('xmlns',namespace))
             if tag == 'svg': self.svgOK += 1
             return self.handle_data('<%s%s>' % (tag, self.strattrs(attrs)), escape=0)
 
         # match namespaces
         if tag.find(':') <> -1:
             prefix, suffix = tag.split(':', 1)
         else:
             prefix, suffix = '', tag
         prefix = self.namespacemap.get(prefix, prefix)
         if prefix:
             prefix = prefix + '_'
 
         # special hack for better tracking of empty textinput/image elements in illformed feeds
         if (not prefix) and tag not in ('title', 'link', 'description', 'name'):
             self.intextinput = 0
         if (not prefix) and tag not in ('title', 'link', 'description', 'url', 'href', 'width', 'height'):
             self.inimage = 0
 
         # call special handler (if defined) or default handler
         methodname = '_start_' + prefix + suffix
         try:
             method = getattr(self, methodname)
             return method(attrsD)
         except AttributeError:
             return self.push(prefix + suffix, 1)
 
     def unknown_endtag(self, tag):
         if _debug: sys.stderr.write('end %s\n' % tag)
         # match namespaces
         if tag.find(':') <> -1:
             prefix, suffix = tag.split(':', 1)
         else:
             prefix, suffix = '', tag
         prefix = self.namespacemap.get(prefix, prefix)
         if prefix:
             prefix = prefix + '_'
         if suffix == 'svg' and self.svgOK: self.svgOK -= 1
 
         # call special handler (if defined) or default handler
         methodname = '_end_' + prefix + suffix
         try:
             if self.svgOK: raise AttributeError()
             method = getattr(self, methodname)
             method()
         except AttributeError:
             self.pop(prefix + suffix)
 
         # track inline content
         if self.incontent and self.contentparams.has_key('type') and not self.contentparams.get('type', 'xml').endswith('xml'):
             # element declared itself as escaped markup, but it isn't really
             if tag in ['xhtml:div', 'div']: return # typepad does this 10/2007
             self.contentparams['type'] = 'application/xhtml+xml'
         if self.incontent and self.contentparams.get('type') == 'application/xhtml+xml':
             tag = tag.split(':')[-1]
             self.handle_data('</%s>' % tag, escape=0)
 
         # track xml:base and xml:lang going out of scope
         if self.basestack:
             self.basestack.pop()
             if self.basestack and self.basestack[-1]:
                 self.baseuri = self.basestack[-1]
         if self.langstack:
             self.langstack.pop()
             if self.langstack: # and (self.langstack[-1] is not None):
                 self.lang = self.langstack[-1]
 
     def handle_charref(self, ref):
         # called for each character reference, e.g. for '&#160;', ref will be '160'
         if not self.elementstack: return
         ref = ref.lower()
         if ref in ('34', '38', '39', '60', '62', 'x22', 'x26', 'x27', 'x3c', 'x3e'):
             text = '&#%s;' % ref
         else:
             if ref[0] == 'x':
                 c = int(ref[1:], 16)
             else:
                 c = int(ref)
             text = unichr(c).encode('utf-8')
         self.elementstack[-1][2].append(text)
 
     def handle_entityref(self, ref):
         # called for each entity reference, e.g. for '&copy;', ref will be 'copy'
         if not self.elementstack: return
         if _debug: sys.stderr.write('entering handle_entityref with %s\n' % ref)
         if ref in ('lt', 'gt', 'quot', 'amp', 'apos'):
             text = '&%s;' % ref
         elif ref in self.entities.keys():
             text = self.entities[ref]
             if text.startswith('&#') and text.endswith(';'):
                 return self.handle_entityref(text)
         else:
             try: name2codepoint[ref]
             except KeyError: text = '&%s;' % ref
             else: text = unichr(name2codepoint[ref]).encode('utf-8')
         self.elementstack[-1][2].append(text)
 
     def handle_data(self, text, escape=1):
         # called for each block of plain text, i.e. outside of any tag and
         # not containing any character or entity references
         if not self.elementstack: return
         if escape and self.contentparams.get('type') == 'application/xhtml+xml':
             text = _xmlescape(text)
         self.elementstack[-1][2].append(text)
 
     def handle_comment(self, text):
         # called for each comment, e.g. <!-- insert message here -->
         pass
 
     def handle_pi(self, text):
         # called for each processing instruction, e.g. <?instruction>
         pass
 
     def handle_decl(self, text):
         pass
 
     def parse_declaration(self, i):
         # override internal declaration handler to handle CDATA blocks
         if _debug: sys.stderr.write('entering parse_declaration\n')
         if self.rawdata[i:i+9] == '<![CDATA[':
             k = self.rawdata.find(']]>', i)
             if k == -1: k = len(self.rawdata)
             self.handle_data(_xmlescape(self.rawdata[i+9:k]), 0)
             return k+3
         else:
             k = self.rawdata.find('>', i)
             return k+1
 
     def mapContentType(self, contentType):
         contentType = contentType.lower()
         if contentType == 'text':
             contentType = 'text/plain'
         elif contentType == 'html':
             contentType = 'text/html'
         elif contentType == 'xhtml':
             contentType = 'application/xhtml+xml'
         return contentType
 
     def trackNamespace(self, prefix, uri):
         loweruri = uri.lower()
         if (prefix, loweruri) == (None, 'http://my.netscape.com/rdf/simple/0.9/') and not self.version:
             self.version = 'rss090'
         if loweruri == 'http://purl.org/rss/1.0/' and not self.version:
             self.version = 'rss10'
         if loweruri == 'http://www.w3.org/2005/atom' and not self.version:
             self.version = 'atom10'
         if loweruri.find('backend.userland.com/rss') <> -1:
             # match any backend.userland.com namespace
             uri = 'http://backend.userland.com/rss'
             loweruri = uri
         if self._matchnamespaces.has_key(loweruri):
             self.namespacemap[prefix] = self._matchnamespaces[loweruri]
             self.namespacesInUse[self._matchnamespaces[loweruri]] = uri
         else:
             self.namespacesInUse[prefix or ''] = uri
 
     def resolveURI(self, uri):
         return _urljoin(self.baseuri or '', uri)
 
     def decodeEntities(self, element, data):
         return data
 
     def strattrs(self, attrs):
         return ''.join([' %s="%s"' % (t[0],_xmlescape(t[1],{'"':'&quot;'})) for t in attrs])
 
     def push(self, element, expectingText):
         self.elementstack.append([element, expectingText, []])
 
     def pop(self, element, stripWhitespace=1):
         if not self.elementstack: return
         if self.elementstack[-1][0] != element: return
 
         element, expectingText, pieces = self.elementstack.pop()
 
         if self.version == 'atom10' and self.contentparams.get('type','text') == 'application/xhtml+xml':
             # remove enclosing child element, but only if it is a <div> and
             # only if all the remaining content is nested underneath it.
             # This means that the divs would be retained in the following:
             #    <div>foo</div><div>bar</div>
             while pieces and len(pieces)>1 and not pieces[-1].strip():
                 del pieces[-1]
             while pieces and len(pieces)>1 and not pieces[0].strip():
                 del pieces[0]
             if pieces and (pieces[0] == '<div>' or pieces[0].startswith('<div ')) and pieces[-1]=='</div>':
                 depth = 0
                 for piece in pieces[:-1]:
                     if piece.startswith('</'):
                         depth -= 1
                         if depth == 0: break
                     elif piece.startswith('<') and not piece.endswith('/>'):
                         depth += 1
                 else:
                     pieces = pieces[1:-1]
 
         output = ''.join(pieces)
         if stripWhitespace:
             output = output.strip()
         if not expectingText: return output
 
         # decode base64 content
         if base64 and self.contentparams.get('base64', 0):
             try:
                 output = base64.decodestring(output)
             except binascii.Error:
                 pass
             except binascii.Incomplete:
                 pass
 
         # resolve relative URIs
         if (element in self.can_be_relative_uri) and output:
             output = self.resolveURI(output)
 
         # decode entities within embedded markup
         if not self.contentparams.get('base64', 0):
             output = self.decodeEntities(element, output)
 
         if self.lookslikehtml(output):
             self.contentparams['type']='text/html'
 
         # remove temporary cruft from contentparams
         try:
             del self.contentparams['mode']
         except KeyError:
             pass
         try:
             del self.contentparams['base64']
         except KeyError:
             pass
 
         is_htmlish = self.mapContentType(self.contentparams.get('type', 'text/html')) in self.html_types
         # resolve relative URIs within embedded markup
         if is_htmlish and RESOLVE_RELATIVE_URIS:
             if element in self.can_contain_relative_uris:
                 output = _resolveRelativeURIs(output, self.baseuri, self.encoding, self.contentparams.get('type', 'text/html'))
 
         # parse microformats
         # (must do this before sanitizing because some microformats
         # rely on elements that we sanitize)
         if is_htmlish and element in ['content', 'description', 'summary']:
             mfresults = _parseMicroformats(output, self.baseuri, self.encoding)
             if mfresults:
                 for tag in mfresults.get('tags', []):
                     self._addTag(tag['term'], tag['scheme'], tag['label'])
                 for enclosure in mfresults.get('enclosures', []):
                     self._start_enclosure(enclosure)
                 for xfn in mfresults.get('xfn', []):
                     self._addXFN(xfn['relationships'], xfn['href'], xfn['name'])
                 vcard = mfresults.get('vcard')
                 if vcard:
                     self._getContext()['vcard'] = vcard
 
         # sanitize embedded markup
         if is_htmlish and SANITIZE_HTML:
             if element in self.can_contain_dangerous_markup:
                 output = _sanitizeHTML(output, self.encoding, self.contentparams.get('type', 'text/html'))
 
         if self.encoding and type(output) != type(u''):
             try:
                 output = unicode(output, self.encoding)
             except:
                 pass
 
         # address common error where people take data that is already
         # utf-8, presume that it is iso-8859-1, and re-encode it.
         if self.encoding=='utf-8' and type(output) == type(u''):
             try:
                 output = unicode(output.encode('iso-8859-1'), 'utf-8')
             except:
                 pass
 
         # map win-1252 extensions to the proper code points
         if type(output) == type(u''):
             output = u''.join([c in _cp1252.keys() and _cp1252[c] or c for c in output])
 
         # categories/tags/keywords/whatever are handled in _end_category
         if element == 'category':
             return output
 
         if element == 'title' and self.hasTitle:
             return output
 
         # store output in appropriate place(s)
         if self.inentry and not self.insource:
             if element == 'content':
                 self.entries[-1].setdefault(element, [])
                 contentparams = copy.deepcopy(self.contentparams)
                 contentparams['value'] = output
                 self.entries[-1][element].append(contentparams)
             elif element == 'link':
                 self.entries[-1][element] = output
                 if output:
                     self.entries[-1]['links'][-1]['href'] = output
             else:
                 if element == 'description':
                     element = 'summary'
                 self.entries[-1][element] = output
                 if self.incontent:
                     contentparams = copy.deepcopy(self.contentparams)
                     contentparams['value'] = output
                     self.entries[-1][element + '_detail'] = contentparams
         elif (self.infeed or self.insource):# and (not self.intextinput) and (not self.inimage):
             context = self._getContext()
             if element == 'description':
                 element = 'subtitle'
             context[element] = output
             if element == 'link':
                 context['links'][-1]['href'] = output
             elif self.incontent:
                 contentparams = copy.deepcopy(self.contentparams)
                 contentparams['value'] = output
                 context[element + '_detail'] = contentparams
         return output
 
     def pushContent(self, tag, attrsD, defaultContentType, expectingText):
         self.incontent += 1
         if self.lang: self.lang=self.lang.replace('_','-')
         self.contentparams = FeedParserDict({
             'type': self.mapContentType(attrsD.get('type', defaultContentType)),
             'language': self.lang,
             'base': self.baseuri})
         self.contentparams['base64'] = self._isBase64(attrsD, self.contentparams)
         self.push(tag, expectingText)
 
     def popContent(self, tag):
         value = self.pop(tag)
         self.incontent -= 1
         self.contentparams.clear()
         return value
 
     # a number of elements in a number of RSS variants are nominally plain
     # text, but this is routinely ignored.  This is an attempt to detect
     # the most common cases.  As false positives often result in silent
     # data loss, this function errs on the conservative side.
     def lookslikehtml(self, str):
         if self.version.startswith('atom'): return
         if self.contentparams.get('type','text/html') != 'text/plain': return
 
         # must have a close tag or a entity reference to qualify
         if not (re.search(r'</(\w+)>',str) or re.search("&#?\w+;",str)): return
 
         # all tags must be in a restricted subset of valid HTML tags
         if filter(lambda t: t.lower() not in _HTMLSanitizer.acceptable_elements,
             re.findall(r'</?(\w+)',str)): return
 
         # all entities must have been defined as valid HTML entities
         from htmlentitydefs import entitydefs
         if filter(lambda e: e not in entitydefs.keys(),
             re.findall(r'&(\w+);',str)): return
 
         return 1
 
     def _mapToStandardPrefix(self, name):
         colonpos = name.find(':')
         if colonpos <> -1:
             prefix = name[:colonpos]
             suffix = name[colonpos+1:]
             prefix = self.namespacemap.get(prefix, prefix)
             name = prefix + ':' + suffix
         return name
 
     def _getAttribute(self, attrsD, name):
         return attrsD.get(self._mapToStandardPrefix(name))
 
     def _isBase64(self, attrsD, contentparams):
         if attrsD.get('mode', '') == 'base64':
             return 1
         if self.contentparams['type'].startswith('text/'):
             return 0
         if self.contentparams['type'].endswith('+xml'):
             return 0
         if self.contentparams['type'].endswith('/xml'):
             return 0
         return 1
 
     def _itsAnHrefDamnIt(self, attrsD):
         href = attrsD.get('url', attrsD.get('uri', attrsD.get('href', None)))
         if href:
             try:
                 del attrsD['url']
             except KeyError:
                 pass
             try:
                 del attrsD['uri']
             except KeyError:
                 pass
             attrsD['href'] = href
         return attrsD
 
     def _save(self, key, value):
         context = self._getContext()
         context.setdefault(key, value)
 
     def _start_rss(self, attrsD):
         versionmap = {'0.91': 'rss091u',
                       '0.92': 'rss092',
                       '0.93': 'rss093',
                       '0.94': 'rss094'}
         if not self.version:
             attr_version = attrsD.get('version', '')
             version = versionmap.get(attr_version)
             if version:
                 self.version = version
             elif attr_version.startswith('2.'):
                 self.version = 'rss20'
             else:
                 self.version = 'rss'
 
     def _start_dlhottitles(self, attrsD):
         self.version = 'hotrss'
 
     def _start_channel(self, attrsD):
         self.infeed = 1
         self._cdf_common(attrsD)
     _start_feedinfo = _start_channel
 
     def _cdf_common(self, attrsD):
         if attrsD.has_key('lastmod'):
             self._start_modified({})
             self.elementstack[-1][-1] = attrsD['lastmod']
             self._end_modified()
         if attrsD.has_key('href'):
             self._start_link({})
             self.elementstack[-1][-1] = attrsD['href']
             self._end_link()
 
     def _start_feed(self, attrsD):
         self.infeed = 1
         versionmap = {'0.1': 'atom01',
                       '0.2': 'atom02',
                       '0.3': 'atom03'}
         if not self.version:
             attr_version = attrsD.get('version')
             version = versionmap.get(attr_version)
             if version:
                 self.version = version
             else:
                 self.version = 'atom'
 
     def _end_channel(self):
         self.infeed = 0
     _end_feed = _end_channel
 
     def _start_image(self, attrsD):
         context = self._getContext()
         context.setdefault('image', FeedParserDict())
         self.inimage = 1
         self.hasTitle = 0
         self.push('image', 0)
 
     def _end_image(self):
         self.pop('image')
         self.inimage = 0
 
     def _start_textinput(self, attrsD):
         context = self._getContext()
         context.setdefault('textinput', FeedParserDict())
         self.intextinput = 1
         self.hasTitle = 0
         self.push('textinput', 0)
     _start_textInput = _start_textinput
 
     def _end_textinput(self):
         self.pop('textinput')
         self.intextinput = 0
     _end_textInput = _end_textinput
 
     def _start_author(self, attrsD):
         self.inauthor = 1
         self.push('author', 1)
     _start_managingeditor = _start_author
     _start_dc_author = _start_author
     _start_dc_creator = _start_author
     _start_itunes_author = _start_author
 
     def _end_author(self):
         self.pop('author')
         self.inauthor = 0
         self._sync_author_detail()
     _end_managingeditor = _end_author
     _end_dc_author = _end_author
     _end_dc_creator = _end_author
     _end_itunes_author = _end_author
 
     def _start_itunes_owner(self, attrsD):
         self.inpublisher = 1
         self.push('publisher', 0)
 
     def _end_itunes_owner(self):
         self.pop('publisher')
         self.inpublisher = 0
         self._sync_author_detail('publisher')
 
     def _start_contributor(self, attrsD):
         self.incontributor = 1
         context = self._getContext()
         context.setdefault('contributors', [])
         context['contributors'].append(FeedParserDict())
         self.push('contributor', 0)
 
     def _end_contributor(self):
         self.pop('contributor')
         self.incontributor = 0
 
     def _start_dc_contributor(self, attrsD):
         self.incontributor = 1
         context = self._getContext()
         context.setdefault('contributors', [])
         context['contributors'].append(FeedParserDict())
         self.push('name', 0)
 
     def _end_dc_contributor(self):
         self._end_name()
         self.incontributor = 0
 
     def _start_name(self, attrsD):
         self.push('name', 0)
     _start_itunes_name = _start_name
 
     def _end_name(self):
         value = self.pop('name')
         if self.inpublisher:
             self._save_author('name', value, 'publisher')
         elif self.inauthor:
             self._save_author('name', value)
         elif self.incontributor:
             self._save_contributor('name', value)
         elif self.intextinput:
             context = self._getContext()
             context['name'] = value
     _end_itunes_name = _end_name
 
     def _start_width(self, attrsD):
         self.push('width', 0)
 
     def _end_width(self):
         value = self.pop('width')
         try:
             value = int(value)
         except:
             value = 0
         if self.inimage:
             context = self._getContext()
             context['width'] = value
 
     def _start_height(self, attrsD):
         self.push('height', 0)
 
     def _end_height(self):
         value = self.pop('height')
         try:
             value = int(value)
         except:
             value = 0
         if self.inimage:
             context = self._getContext()
             context['height'] = value
 
     def _start_url(self, attrsD):
         self.push('href', 1)
     _start_homepage = _start_url
     _start_uri = _start_url
 
     def _end_url(self):
         value = self.pop('href')
         if self.inauthor:
             self._save_author('href', value)
         elif self.incontributor:
             self._save_contributor('href', value)
     _end_homepage = _end_url
     _end_uri = _end_url
 
     def _start_email(self, attrsD):
         self.push('email', 0)
     _start_itunes_email = _start_email
 
     def _end_email(self):
         value = self.pop('email')
         if self.inpublisher:
             self._save_author('email', value, 'publisher')
         elif self.inauthor:
             self._save_author('email', value)
         elif self.incontributor:
             self._save_contributor('email', value)
     _end_itunes_email = _end_email
 
     def _getContext(self):
         if self.insource:
             context = self.sourcedata
         elif self.inimage:
             context = self.feeddata['image']
         elif self.intextinput:
             context = self.feeddata['textinput']
         elif self.inentry:
             context = self.entries[-1]
         else:
             context = self.feeddata
         return context
 
     def _save_author(self, key, value, prefix='author'):
         context = self._getContext()
         context.setdefault(prefix + '_detail', FeedParserDict())
         context[prefix + '_detail'][key] = value
         self._sync_author_detail()
 
     def _save_contributor(self, key, value):
         context = self._getContext()
         context.setdefault('contributors', [FeedParserDict()])
         context['contributors'][-1][key] = value
 
     def _sync_author_detail(self, key='author'):
         context = self._getContext()
         detail = context.get('%s_detail' % key)
         if detail:
             name = detail.get('name')
             email = detail.get('email')
             if name and email:
                 context[key] = '%s (%s)' % (name, email)
             elif name:
                 context[key] = name
             elif email:
                 context[key] = email
         else:
             author, email = context.get(key), None
             if not author: return
             emailmatch = re.search(r'''(([a-zA-Z0-9\_\-\.\+]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?))(\?subject=\S+)?''', author)
             if emailmatch:
                 email = emailmatch.group(0)
                 # probably a better way to do the following, but it passes all the tests
                 author = author.replace(email, '')
                 author = author.replace('()', '')
                 author = author.replace('<>', '')
                 author = author.replace('&lt;&gt;', '')
                 author = author.strip()
                 if author and (author[0] == '('):
                     author = author[1:]
                 if author and (author[-1] == ')'):
                     author = author[:-1]
                 author = author.strip()
             if author or email:
                 context.setdefault('%s_detail' % key, FeedParserDict())
             if author:
                 context['%s_detail' % key]['name'] = author
             if email:
                 context['%s_detail' % key]['email'] = email
 
     def _start_subtitle(self, attrsD):
         self.pushContent('subtitle', attrsD, 'text/plain', 1)
     _start_tagline = _start_subtitle
     _start_itunes_subtitle = _start_subtitle
 
     def _end_subtitle(self):
         self.popContent('subtitle')
     _end_tagline = _end_subtitle
     _end_itunes_subtitle = _end_subtitle
 
     def _start_rights(self, attrsD):
         self.pushContent('rights', attrsD, 'text/plain', 1)
     _start_dc_rights = _start_rights
     _start_copyright = _start_rights
 
     def _end_rights(self):
         self.popContent('rights')
     _end_dc_rights = _end_rights
     _end_copyright = _end_rights
 
     def _start_item(self, attrsD):
         self.entries.append(FeedParserDict())
         self.push('item', 0)
         self.inentry = 1
         self.guidislink = 0
         self.hasTitle = 0
         id = self._getAttribute(attrsD, 'rdf:about')
         if id:
             context = self._getContext()
             context['id'] = id
         self._cdf_common(attrsD)
     _start_entry = _start_item
     _start_product = _start_item
 
     def _end_item(self):
         self.pop('item')
         self.inentry = 0
     _end_entry = _end_item
 
     def _start_dc_language(self, attrsD):
         self.push('language', 1)
     _start_language = _start_dc_language
 
     def _end_dc_language(self):
         self.lang = self.pop('language')
     _end_language = _end_dc_language
 
     def _start_dc_publisher(self, attrsD):
         self.push('publisher', 1)
     _start_webmaster = _start_dc_publisher
 
     def _end_dc_publisher(self):
         self.pop('publisher')
         self._sync_author_detail('publisher')
     _end_webmaster = _end_dc_publisher
 
     def _start_published(self, attrsD):
         self.push('published', 1)
     _start_dcterms_issued = _start_published
     _start_issued = _start_published
 
     def _end_published(self):
         value = self.pop('published')
         self._save('published_parsed', _parse_date(value))
     _end_dcterms_issued = _end_published
     _end_issued = _end_published
 
     def _start_updated(self, attrsD):
         self.push('updated', 1)
     _start_modified = _start_updated
     _start_dcterms_modified = _start_updated
     _start_pubdate = _start_updated
     _start_dc_date = _start_updated
 
     def _end_updated(self):
         value = self.pop('updated')
         parsed_value = _parse_date(value)
         self._save('updated_parsed', parsed_value)
     _end_modified = _end_updated
     _end_dcterms_modified = _end_updated
     _end_pubdate = _end_updated
     _end_dc_date = _end_updated
 
     def _start_created(self, attrsD):
         self.push('created', 1)
     _start_dcterms_created = _start_created
 
     def _end_created(self):
         value = self.pop('created')
         self._save('created_parsed', _parse_date(value))
     _end_dcterms_created = _end_created
 
     def _start_expirationdate(self, attrsD):
         self.push('expired', 1)
 
     def _end_expirationdate(self):
         self._save('expired_parsed', _parse_date(self.pop('expired')))
 
     def _start_cc_license(self, attrsD):
         context = self._getContext()
         value = self._getAttribute(attrsD, 'rdf:resource')
         attrsD = FeedParserDict()
         attrsD['rel']='license'
         if value: attrsD['href']=value
         context.setdefault('links', []).append(attrsD)
 
     def _start_creativecommons_license(self, attrsD):
         self.push('license', 1)
     _start_creativeCommons_license = _start_creativecommons_license
 
     def _end_creativecommons_license(self):
         value = self.pop('license')
         context = self._getContext()
         attrsD = FeedParserDict()
         attrsD['rel']='license'
         if value: attrsD['href']=value
         context.setdefault('links', []).append(attrsD)
         del context['license']
     _end_creativeCommons_license = _end_creativecommons_license
 
     def _addXFN(self, relationships, href, name):
         context = self._getContext()
         xfn = context.setdefault('xfn', [])
         value = FeedParserDict({'relationships': relationships, 'href': href, 'name': name})
         if value not in xfn:
             xfn.append(value)
 
     def _addTag(self, term, scheme, label):
         context = self._getContext()
         tags = context.setdefault('tags', [])
         if (not term) and (not scheme) and (not label): return
         value = FeedParserDict({'term': term, 'scheme': scheme, 'label': label})
         if value not in tags:
             tags.append(value)
 
     def _start_category(self, attrsD):
         if _debug: sys.stderr.write('entering _start_category with %s\n' % repr(attrsD))
         term = attrsD.get('term')
         scheme = attrsD.get('scheme', attrsD.get('domain'))
         label = attrsD.get('label')
         self._addTag(term, scheme, label)
         self.push('category', 1)
     _start_dc_subject = _start_category
     _start_keywords = _start_category
 
     def _end_itunes_keywords(self):
         for term in self.pop('itunes_keywords').split():
             self._addTag(term, 'http://www.itunes.com/', None)
 
     def _start_itunes_category(self, attrsD):
         self._addTag(attrsD.get('text'), 'http://www.itunes.com/', None)
         self.push('category', 1)
 
     def _end_category(self):
         value = self.pop('category')
         if not value: return
         context = self._getContext()
         tags = context['tags']
         if value and len(tags) and not tags[-1]['term']:
             tags[-1]['term'] = value
         else:
             self._addTag(value, None, None)
     _end_dc_subject = _end_category
     _end_keywords = _end_category
     _end_itunes_category = _end_category
 
     def _start_cloud(self, attrsD):
         self._getContext()['cloud'] = FeedParserDict(attrsD)
 
     def _start_link(self, attrsD):
         attrsD.setdefault('rel', 'alternate')
         if attrsD['rel'] == 'self':
             attrsD.setdefault('type', 'application/atom+xml')
         else:
             attrsD.setdefault('type', 'text/html')
         context = self._getContext()
         attrsD = self._itsAnHrefDamnIt(attrsD)
         if attrsD.has_key('href'):
             attrsD['href'] = self.resolveURI(attrsD['href'])
             if attrsD.get('rel')=='enclosure' and not context.get('id'):
                 context['id'] = attrsD.get('href')
         expectingText = self.infeed or self.inentry or self.insource
         context.setdefault('links', [])
         context['links'].append(FeedParserDict(attrsD))
         if attrsD.has_key('href'):
             expectingText = 0
             if (attrsD.get('rel') == 'alternate') and (self.mapContentType(attrsD.get('type')) in self.html_types):
                 context['link'] = attrsD['href']
         else:
             self.push('link', expectingText)
     _start_producturl = _start_link
 
     def _end_link(self):
         value = self.pop('link')
         context = self._getContext()
     _end_producturl = _end_link
 
     def _start_guid(self, attrsD):
         self.guidislink = (attrsD.get('ispermalink', 'true') == 'true')
         self.push('id', 1)
 
     def _end_guid(self):
         value = self.pop('id')
         self._save('guidislink', self.guidislink and not self._getContext().has_key('link'))
         if self.guidislink:
             # guid acts as link, but only if 'ispermalink' is not present or is 'true',
             # and only if the item doesn't already have a link element
             self._save('link', value)
 
     def _start_title(self, attrsD):
         if self.svgOK: return self.unknown_starttag('title', attrsD.items())
         self.pushContent('title', attrsD, 'text/plain', self.infeed or self.inentry or self.insource)
     _start_dc_title = _start_title
     _start_media_title = _start_title
 
     def _end_title(self):
         if self.svgOK: return
         value = self.popContent('title')
         if not value: return
         context = self._getContext()
         self.hasTitle = 1
     _end_dc_title = _end_title
 
     def _end_media_title(self):
         hasTitle = self.hasTitle
         self._end_title()
         self.hasTitle = hasTitle
 
     def _start_description(self, attrsD):
         context = self._getContext()
         if context.has_key('summary'):
             self._summaryKey = 'content'
             self._start_content(attrsD)
         else:
             self.pushContent('description', attrsD, 'text/html', self.infeed or self.inentry or self.insource)
     _start_dc_description = _start_description
 
     def _start_abstract(self, attrsD):
         self.pushContent('description', attrsD, 'text/plain', self.infeed or self.inentry or self.insource)
 
     def _end_description(self):
         if self._summaryKey == 'content':
             self._end_content()
         else:
             value = self.popContent('description')
         self._summaryKey = None
     _end_abstract = _end_description
     _end_dc_description = _end_description
 
     def _start_info(self, attrsD):
         self.pushContent('info', attrsD, 'text/plain', 1)
     _start_feedburner_browserfriendly = _start_info
 
     def _end_info(self):
         self.popContent('info')
     _end_feedburner_browserfriendly = _end_info
 
     def _start_generator(self, attrsD):
         if attrsD:
             attrsD = self._itsAnHrefDamnIt(attrsD)
             if attrsD.has_key('href'):
                 attrsD['href'] = self.resolveURI(attrsD['href'])
         self._getContext()['generator_detail'] = FeedParserDict(attrsD)
         self.push('generator', 1)
 
     def _end_generator(self):
         value = self.pop('generator')
         context = self._getContext()
         if context.has_key('generator_detail'):
             context['generator_detail']['name'] = value
 
     def _start_admin_generatoragent(self, attrsD):
         self.push('generator', 1)
         value = self._getAttribute(attrsD, 'rdf:resource')
         if value:
             self.elementstack[-1][2].append(value)
         self.pop('generator')
         self._getContext()['generator_detail'] = FeedParserDict({'href': value})
 
     def _start_admin_errorreportsto(self, attrsD):
         self.push('errorreportsto', 1)
         value = self._getAttribute(attrsD, 'rdf:resource')
         if value:
             self.elementstack[-1][2].append(value)
         self.pop('errorreportsto')
 
     def _start_summary(self, attrsD):
         context = self._getContext()
         if context.has_key('summary'):
             self._summaryKey = 'content'
             self._start_content(attrsD)
         else:
             self._summaryKey = 'summary'
             self.pushContent(self._summaryKey, attrsD, 'text/plain', 1)
     _start_itunes_summary = _start_summary
 
     def _end_summary(self):
         if self._summaryKey == 'content':
             self._end_content()
         else:
             self.popContent(self._summaryKey or 'summary')
         self._summaryKey = None
     _end_itunes_summary = _end_summary
 
     def _start_enclosure(self, attrsD):
         attrsD = self._itsAnHrefDamnIt(attrsD)
         context = self._getContext()
         attrsD['rel']='enclosure'
         context.setdefault('links', []).append(FeedParserDict(attrsD))
         href = attrsD.get('href')
         if href and not context.get('id'):
             context['id'] = href
 
     def _start_source(self, attrsD):
         self.insource = 1
         self.hasTitle = 0
 
     def _end_source(self):
         self.insource = 0
         self._getContext()['source'] = copy.deepcopy(self.sourcedata)
         self.sourcedata.clear()
 
     def _start_content(self, attrsD):
         self.pushContent('content', attrsD, 'text/plain', 1)
         src = attrsD.get('src')
         if src:
             self.contentparams['src'] = src
         self.push('content', 1)
 
     def _start_prodlink(self, attrsD):
         self.pushContent('content', attrsD, 'text/html', 1)
 
     def _start_body(self, attrsD):
         self.pushContent('content', attrsD, 'application/xhtml+xml', 1)
     _start_xhtml_body = _start_body
 
     def _start_content_encoded(self, attrsD):
         self.pushContent('content', attrsD, 'text/html', 1)
     _start_fullitem = _start_content_encoded
 
     def _end_content(self):
         copyToDescription = self.mapContentType(self.contentparams.get('type')) in (['text/plain'] + self.html_types)
         value = self.popContent('content')
         if copyToDescription:
             self._save('description', value)
 
     _end_body = _end_content
     _end_xhtml_body = _end_content
     _end_content_encoded = _end_content
     _end_fullitem = _end_content
     _end_prodlink = _end_content
 
     def _start_itunes_image(self, attrsD):
         self.push('itunes_image', 0)
         self._getContext()['image'] = FeedParserDict({'href': attrsD.get('href')})
     _start_itunes_link = _start_itunes_image
 
     def _end_itunes_block(self):
         value = self.pop('itunes_block', 0)
         self._getContext()['itunes_block'] = (value == 'yes') and 1 or 0
 
     def _end_itunes_explicit(self):
         value = self.pop('itunes_explicit', 0)
         self._getContext()['itunes_explicit'] = (value == 'yes') and 1 or 0
 
 if _XML_AVAILABLE:
     class _StrictFeedParser(_FeedParserMixin, xml.sax.handler.ContentHandler):
         def __init__(self, baseuri, baselang, encoding):
             if _debug: sys.stderr.write('trying StrictFeedParser\n')
             xml.sax.handler.ContentHandler.__init__(self)
             _FeedParserMixin.__init__(self, baseuri, baselang, encoding)
             self.bozo = 0
             self.exc = None
 
         def startPrefixMapping(self, prefix, uri):
             self.trackNamespace(prefix, uri)
 
         def startElementNS(self, name, qname, attrs):
             namespace, localname = name
             lowernamespace = str(namespace or '').lower()
             if lowernamespace.find('backend.userland.com/rss') <> -1:
                 # match any backend.userland.com namespace
                 namespace = 'http://backend.userland.com/rss'
                 lowernamespace = namespace
             if qname and qname.find(':') > 0:
                 givenprefix = qname.split(':')[0]
             else:
                 givenprefix = None
             prefix = self._matchnamespaces.get(lowernamespace, givenprefix)
             if givenprefix and (prefix == None or (prefix == '' and lowernamespace == '')) and not self.namespacesInUse.has_key(givenprefix):
                     raise UndeclaredNamespace, "'%s' is not associated with a namespace" % givenprefix
             localname = str(localname).lower()
 
             # qname implementation is horribly broken in Python 2.1 (it
             # doesn't report any), and slightly broken in Python 2.2 (it
             # doesn't report the xml: namespace). So we match up namespaces
             # with a known list first, and then possibly override them with
             # the qnames the SAX parser gives us (if indeed it gives us any
             # at all).  Thanks to MatejC for helping me test this and
             # tirelessly telling me that it didn't work yet.
             attrsD = {}
             if localname=='math' and namespace=='http://www.w3.org/1998/Math/MathML':
                 attrsD['xmlns']=namespace
             if localname=='svg' and namespace=='http://www.w3.org/2000/svg':
                 attrsD['xmlns']=namespace
 
             if prefix:
                 localname = prefix.lower() + ':' + localname
             elif namespace and not qname: #Expat
                 for name,value in self.namespacesInUse.items():
                      if name and value == namespace:
                          localname = name + ':' + localname
                          break
             if _debug: sys.stderr.write('startElementNS: qname = %s, namespace = %s, givenprefix = %s, prefix = %s, attrs = %s, localname = %s\n' % (qname, namespace, givenprefix, prefix, attrs.items(), localname))
 
             for (namespace, attrlocalname), attrvalue in attrs._attrs.items():
                 lowernamespace = (namespace or '').lower()
                 prefix = self._matchnamespaces.get(lowernamespace, '')
                 if prefix:
                     attrlocalname = prefix + ':' + attrlocalname
                 attrsD[str(attrlocalname).lower()] = attrvalue
             for qname in attrs.getQNames():
                 attrsD[str(qname).lower()] = attrs.getValueByQName(qname)
             self.unknown_starttag(localname, attrsD.items())
 
         def characters(self, text):
             self.handle_data(text)
 
         def endElementNS(self, name, qname):
             namespace, localname = name
             lowernamespace = str(namespace or '').lower()
             if qname and qname.find(':') > 0:
                 givenprefix = qname.split(':')[0]
             else:
                 givenprefix = ''
             prefix = self._matchnamespaces.get(lowernamespace, givenprefix)
             if prefix:
                 localname = prefix + ':' + localname
             elif namespace and not qname: #Expat
                 for name,value in self.namespacesInUse.items():
                      if name and value == namespace:
                          localname = name + ':' + localname
                          break
             localname = str(localname).lower()
             self.unknown_endtag(localname)
 
         def error(self, exc):
             self.bozo = 1
             self.exc = exc
 
         def fatalError(self, exc):
             self.error(exc)
             raise exc
 
 class _BaseHTMLProcessor(sgmllib.SGMLParser):
     special = re.compile('''[<>'"]''')
     bare_ampersand = re.compile("&(?!#\d+;|#x[0-9a-fA-F]+;|\w+;)")
     elements_no_end_tag = ['area', 'base', 'basefont', 'br', 'col', 'frame', 'hr',
       'img', 'input', 'isindex', 'link', 'meta', 'param']
 
     def __init__(self, encoding, type):
         self.encoding = encoding
         self.type = type
         if _debug: sys.stderr.write('entering BaseHTMLProcessor, encoding=%s\n' % self.encoding)
         sgmllib.SGMLParser.__init__(self)
 
     def reset(self):
         self.pieces = []
         sgmllib.SGMLParser.reset(self)
 
     def _shorttag_replace(self, match):
         tag = match.group(1)
         if tag in self.elements_no_end_tag:
             return '<' + tag + ' />'
         else:
             return '<' + tag + '></' + tag + '>'
 
     def parse_starttag(self,i):
         j=sgmllib.SGMLParser.parse_starttag(self, i)
         if self.type == 'application/xhtml+xml':
             if j>2 and self.rawdata[j-2:j]=='/>':
                 self.unknown_endtag(self.lasttag)
         return j
 
     def feed(self, data):
         data = re.compile(r'<!((?!DOCTYPE|--|\[))', re.IGNORECASE).sub(r'&lt;!\1', data)
         #data = re.sub(r'<(\S+?)\s*?/>', self._shorttag_replace, data) # bug [ 1399464 ] Bad regexp for _shorttag_replace
         data = re.sub(r'<([^<\s]+?)\s*/>', self._shorttag_replace, data)
         data = data.replace('&#39;', "'")
         data = data.replace('&#34;', '"')
         if self.encoding and type(data) == type(u''):
             data = data.encode(self.encoding)
         sgmllib.SGMLParser.feed(self, data)
         sgmllib.SGMLParser.close(self)
 
     def normalize_attrs(self, attrs):
         if not attrs: return attrs
         # utility method to be called by descendants
         attrs = dict([(k.lower(), v) for k, v in attrs]).items()
         attrs = [(k, k in ('rel', 'type') and v.lower() or v) for k, v in attrs]
         attrs.sort()
         return attrs
 
     def unknown_starttag(self, tag, attrs):
         # called for each start tag
         # attrs is a list of (attr, value) tuples
         # e.g. for <pre class='screen'>, tag='pre', attrs=[('class', 'screen')]
         if _debug: sys.stderr.write('_BaseHTMLProcessor, unknown_starttag, tag=%s\n' % tag)
         uattrs = []
         strattrs=''
         if attrs:
             for key, value in attrs:
                 value=value.replace('>','&gt;').replace('<','&lt;').replace('"','&quot;')
                 value = self.bare_ampersand.sub("&amp;", value)
                 # thanks to Kevin Marks for this breathtaking hack to deal with (valid) high-bit attribute values in UTF-8 feeds
                 if type(value) != type(u''):
                     try:
                         value = unicode(value, self.encoding)
                     except:
                         value = unicode(value, 'iso-8859-1')
                 uattrs.append((unicode(key, self.encoding), value))
             strattrs = u''.join([u' %s="%s"' % (key, value) for key, value in uattrs])
             if self.encoding:
                 try:
                     strattrs=strattrs.encode(self.encoding)
                 except:
                     pass
         if tag in self.elements_no_end_tag:
             self.pieces.append('<%(tag)s%(strattrs)s />' % locals())
         else:
             self.pieces.append('<%(tag)s%(strattrs)s>' % locals())
 
     def unknown_endtag(self, tag):
         # called for each end tag, e.g. for </pre>, tag will be 'pre'
         # Reconstruct the original end tag.
         if tag not in self.elements_no_end_tag:
             self.pieces.append("</%(tag)s>" % locals())
 
     def handle_charref(self, ref):
         # called for each character reference, e.g. for '&#160;', ref will be '160'
         # Reconstruct the original character reference.
         if ref.startswith('x'):
             value = unichr(int(ref[1:],16))
         else:
             value = unichr(int(ref))
 
         if value in _cp1252.keys():
             self.pieces.append('&#%s;' % hex(ord(_cp1252[value]))[1:])
         else:
             self.pieces.append('&#%(ref)s;' % locals())
 
     def handle_entityref(self, ref):
         # called for each entity reference, e.g. for '&copy;', ref will be 'copy'
         # Reconstruct the original entity reference.
         if name2codepoint.has_key(ref):
             self.pieces.append('&%(ref)s;' % locals())
         else:
             self.pieces.append('&amp;%(ref)s' % locals())
 
     def handle_data(self, text):
         # called for each block of plain text, i.e. outside of any tag and
         # not containing any character or entity references
         # Store the original text verbatim.
         if _debug: sys.stderr.write('_BaseHTMLProcessor, handle_text, text=%s\n' % text)
         self.pieces.append(text)
 
     def handle_comment(self, text):
         # called for each HTML comment, e.g. <!-- insert Javascript code here -->
         # Reconstruct the original comment.
         self.pieces.append('<!--%(text)s-->' % locals())
 
     def handle_pi(self, text):
         # called for each processing instruction, e.g. <?instruction>
         # Reconstruct original processing instruction.
         self.pieces.append('<?%(text)s>' % locals())
 
     def handle_decl(self, text):
         # called for the DOCTYPE, if present, e.g.
         # <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
         #     "http://www.w3.org/TR/html4/loose.dtd">
         # Reconstruct original DOCTYPE
         self.pieces.append('<!%(text)s>' % locals())
 
     _new_declname_match = re.compile(r'[a-zA-Z][-_.a-zA-Z0-9:]*\s*').match
     def _scan_name(self, i, declstartpos):
         rawdata = self.rawdata
         n = len(rawdata)
         if i == n:
             return None, -1
         m = self._new_declname_match(rawdata, i)
         if m:
             s = m.group()
             name = s.strip()
             if (i + len(s)) == n:
                 return None, -1  # end of buffer
             return name.lower(), m.end()
         else:
             self.handle_data(rawdata)
 #            self.updatepos(declstartpos, i)
             return None, -1
 
     def convert_charref(self, name):
         return '&#%s;' % name
 
     def convert_entityref(self, name):
         return '&%s;' % name
 
     def output(self):
         '''Return processed HTML as a single string'''
         return ''.join([str(p) for p in self.pieces])
 
 class _LooseFeedParser(_FeedParserMixin, _BaseHTMLProcessor):
     def __init__(self, baseuri, baselang, encoding, entities):
         sgmllib.SGMLParser.__init__(self)
         _FeedParserMixin.__init__(self, baseuri, baselang, encoding)
         _BaseHTMLProcessor.__init__(self, encoding, 'application/xhtml+xml')
         self.entities=entities
 
     def decodeEntities(self, element, data):
         data = data.replace('&#60;', '&lt;')
         data = data.replace('&#x3c;', '&lt;')
         data = data.replace('&#x3C;', '&lt;')
         data = data.replace('&#62;', '&gt;')
         data = data.replace('&#x3e;', '&gt;')
         data = data.replace('&#x3E;', '&gt;')
         data = data.replace('&#38;', '&amp;')
         data = data.replace('&#x26;', '&amp;')
         data = data.replace('&#34;', '&quot;')
         data = data.replace('&#x22;', '&quot;')
         data = data.replace('&#39;', '&apos;')
         data = data.replace('&#x27;', '&apos;')
         if self.contentparams.has_key('type') and not self.contentparams.get('type', 'xml').endswith('xml'):
             data = data.replace('&lt;', '<')
             data = data.replace('&gt;', '>')
             data = data.replace('&amp;', '&')
             data = data.replace('&quot;', '"')
             data = data.replace('&apos;', "'")
         return data
 
     def strattrs(self, attrs):
         return ''.join([' %s="%s"' % (n,v.replace('"','&quot;')) for n,v in attrs])
 
 class _MicroformatsParser:
     STRING = 1
     DATE = 2
     URI = 3
     NODE = 4
     EMAIL = 5
 
     known_xfn_relationships = ['contact', 'acquaintance', 'friend', 'met', 'co-worker', 'coworker', 'colleague', 'co-resident', 'coresident', 'neighbor', 'child', 'parent', 'sibling', 'brother', 'sister', 'spouse', 'wife', 'husband', 'kin', 'relative', 'muse', 'crush', 'date', 'sweetheart', 'me']
     known_binary_extensions =  ['zip','rar','exe','gz','tar','tgz','tbz2','bz2','z','7z','dmg','img','sit','sitx','hqx','deb','rpm','bz2','jar','rar','iso','bin','msi','mp2','mp3','ogg','ogm','mp4','m4v','m4a','avi','wma','wmv']
 
     def __init__(self, data, baseuri, encoding):
         self.document = BeautifulSoup.BeautifulSoup(data)
         self.baseuri = baseuri
         self.encoding = encoding
         if type(data) == type(u''):
             data = data.encode(encoding)
         self.tags = []
         self.enclosures = []
         self.xfn = []
         self.vcard = None
 
     def vcardEscape(self, s):
         if type(s) in (type(''), type(u'')):
             s = s.replace(',', '\\,').replace(';', '\\;').replace('\n', '\\n')
         return s
 
     def vcardFold(self, s):
         s = re.sub(';+$', '', s)
         sFolded = ''
         iMax = 75
         sPrefix = ''
         while len(s) > iMax:
             sFolded += sPrefix + s[:iMax] + '\n'
             s = s[iMax:]
             sPrefix = ' '
             iMax = 74
         sFolded += sPrefix + s
         return sFolded
 
     def normalize(self, s):
         return re.sub(r'\s+', ' ', s).strip()
 
     def unique(self, aList):
         results = []
         for element in aList:
             if element not in results:
                 results.append(element)
         return results
 
     def toISO8601(self, dt):
         return time.strftime('%Y-%m-%dT%H:%M:%SZ', dt)
 
     def getPropertyValue(self, elmRoot, sProperty, iPropertyType=4, bAllowMultiple=0, bAutoEscape=0):
         all = lambda x: 1
         sProperty = sProperty.lower()
         bFound = 0
         bNormalize = 1
         propertyMatch = {'class': re.compile(r'\b%s\b' % sProperty)}
         if bAllowMultiple and (iPropertyType != self.NODE):
             snapResults = []
             containers = elmRoot(['ul', 'ol'], propertyMatch)
             for container in containers:
                 snapResults.extend(container('li'))
             bFound = (len(snapResults) != 0)
         if not bFound:
             snapResults = elmRoot(all, propertyMatch)
             bFound = (len(snapResults) != 0)
         if (not bFound) and (sProperty == 'value'):
             snapResults = elmRoot('pre')
             bFound = (len(snapResults) != 0)
             bNormalize = not bFound
             if not bFound:
                 snapResults = [elmRoot]
                 bFound = (len(snapResults) != 0)
         arFilter = []
         if sProperty == 'vcard':
             snapFilter = elmRoot(all, propertyMatch)
             for node in snapFilter:
                 if node.findParent(all, propertyMatch):
                     arFilter.append(node)
         arResults = []
         for node in snapResults:
             if node not in arFilter:
                 arResults.append(node)
         bFound = (len(arResults) != 0)
         if not bFound:
             if bAllowMultiple: return []
             elif iPropertyType == self.STRING: return ''
             elif iPropertyType == self.DATE: return None
             elif iPropertyType == self.URI: return ''
             elif iPropertyType == self.NODE: return None
             else: return None
         arValues = []
         for elmResult in arResults:
             sValue = None
             if iPropertyType == self.NODE:
                 if bAllowMultiple:
                     arValues.append(elmResult)
                     continue
                 else:
                     return elmResult
             sNodeName = elmResult.name.lower()
             if (iPropertyType == self.EMAIL) and (sNodeName == 'a'):
                 sValue = (elmResult.get('href') or '').split('mailto:').pop().split('?')[0]
             if sValue:
                 sValue = bNormalize and self.normalize(sValue) or sValue.strip()
             if (not sValue) and (sNodeName == 'abbr'):
                 sValue = elmResult.get('title')
             if sValue:
                 sValue = bNormalize and self.normalize(sValue) or sValue.strip()
             if (not sValue) and (iPropertyType == self.URI):
                 if sNodeName == 'a': sValue = elmResult.get('href')
                 elif sNodeName == 'img': sValue = elmResult.get('src')
                 elif sNodeName == 'object': sValue = elmResult.get('data')
             if sValue:
                 sValue = bNormalize and self.normalize(sValue) or sValue.strip()
             if (not sValue) and (sNodeName == 'img'):
                 sValue = elmResult.get('alt')
             if sValue:
                 sValue = bNormalize and self.normalize(sValue) or sValue.strip()
             if not sValue:
                 sValue = elmResult.renderContents()
                 sValue = re.sub(r'<\S[^>]*>', '', sValue)
                 sValue = sValue.replace('\r\n', '\n')
                 sValue = sValue.replace('\r', '\n')
             if sValue:
                 sValue = bNormalize and self.normalize(sValue) or sValue.strip()
             if not sValue: continue
             if iPropertyType == self.DATE:
                 sValue = _parse_date_iso8601(sValue)
             if bAllowMultiple:
                 arValues.append(bAutoEscape and self.vcardEscape(sValue) or sValue)
             else:
                 return bAutoEscape and self.vcardEscape(sValue) or sValue
         return arValues
 
     def findVCards(self, elmRoot, bAgentParsing=0):
         sVCards = ''
 
         if not bAgentParsing:
             arCards = self.getPropertyValue(elmRoot, 'vcard', bAllowMultiple=1)
         else:
             arCards = [elmRoot]
 
         for elmCard in arCards:
             arLines = []
 
             def processSingleString(sProperty):
                 sValue = self.getPropertyValue(elmCard, sProperty, self.STRING, bAutoEscape=1)
                 if sValue:
                     arLines.append(self.vcardFold(sProperty.upper() + ':' + sValue))
                 return sValue or ''
 
             def processSingleURI(sProperty):
                 sValue = self.getPropertyValue(elmCard, sProperty, self.URI)
                 if sValue:
                     sContentType = ''
                     sEncoding = ''
                     sValueKey = ''
                     if sValue.startswith('data:'):
                         sEncoding = ';ENCODING=b'
                         sContentType = sValue.split(';')[0].split('/').pop()
                         sValue = sValue.split(',', 1).pop()
                     else:
                         elmValue = self.getPropertyValue(elmCard, sProperty)
                         if elmValue:
                             if sProperty != 'url':
                                 sValueKey = ';VALUE=uri'
                             sContentType = elmValue.get('type', '').strip().split('/').pop().strip()
                     sContentType = sContentType.upper()
                     if sContentType == 'OCTET-STREAM':
                         sContentType = ''
                     if sContentType:
                         sContentType = ';TYPE=' + sContentType.upper()
                     arLines.append(self.vcardFold(sProperty.upper() + sEncoding + sContentType + sValueKey + ':' + sValue))
 
             def processTypeValue(sProperty, arDefaultType, arForceType=None):
                 arResults = self.getPropertyValue(elmCard, sProperty, bAllowMultiple=1)
                 for elmResult in arResults:
                     arType = self.getPropertyValue(elmResult, 'type', self.STRING, 1, 1)
                     if arForceType:
                         arType = self.unique(arForceType + arType)
                     if not arType:
                         arType = arDefaultType
                     sValue = self.getPropertyValue(elmResult, 'value', self.EMAIL, 0)
                     if sValue:
                         arLines.append(self.vcardFold(sProperty.upper() + ';TYPE=' + ','.join(arType) + ':' + sValue))
 
             # AGENT
             # must do this before all other properties because it is destructive
             # (removes nested class="vcard" nodes so they don't interfere with
             # this vcard's other properties)
             arAgent = self.getPropertyValue(elmCard, 'agent', bAllowMultiple=1)
             for elmAgent in arAgent:
                 if re.compile(r'\bvcard\b').search(elmAgent.get('class')):
                     sAgentValue = self.findVCards(elmAgent, 1) + '\n'
                     sAgentValue = sAgentValue.replace('\n', '\\n')
                     sAgentValue = sAgentValue.replace(';', '\\;')
                     if sAgentValue:
                         arLines.append(self.vcardFold('AGENT:' + sAgentValue))
                     elmAgent['class'] = ''
                     elmAgent.contents = []
                 else:
                     sAgentValue = self.getPropertyValue(elmAgent, 'value', self.URI, bAutoEscape=1);
                     if sAgentValue:
                         arLines.append(self.vcardFold('AGENT;VALUE=uri:' + sAgentValue))
 
             # FN (full name)
             sFN = processSingleString('fn')
 
             # N (name)
             elmName = self.getPropertyValue(elmCard, 'n')
             if elmName:
                 sFamilyName = self.getPropertyValue(elmName, 'family-name', self.STRING, bAutoEscape=1)
                 sGivenName = self.getPropertyValue(elmName, 'given-name', self.STRING, bAutoEscape=1)
                 arAdditionalNames = self.getPropertyValue(elmName, 'additional-name', self.STRING, 1, 1) + self.getPropertyValue(elmName, 'additional-names', self.STRING, 1, 1)
                 arHonorificPrefixes = self.getPropertyValue(elmName, 'honorific-prefix', self.STRING, 1, 1) + self.getPropertyValue(elmName, 'honorific-prefixes', self.STRING, 1, 1)
                 arHonorificSuffixes = self.getPropertyValue(elmName, 'honorific-suffix', self.STRING, 1, 1) + self.getPropertyValue(elmName, 'honorific-suffixes', self.STRING, 1, 1)
                 arLines.append(self.vcardFold('N:' + sFamilyName + ';' +
                                          sGivenName + ';' +
                                          ','.join(arAdditionalNames) + ';' +
                                          ','.join(arHonorificPrefixes) + ';' +
                                          ','.join(arHonorificSuffixes)))
             elif sFN:
                 # implied "N" optimization
                 # http://microformats.org/wiki/hcard#Implied_.22N.22_Optimization
                 arNames = self.normalize(sFN).split()
                 if len(arNames) == 2:
                     bFamilyNameFirst = (arNames[0].endswith(',') or
                                         len(arNames[1]) == 1 or
                                         ((len(arNames[1]) == 2) and (arNames[1].endswith('.'))))
                     if bFamilyNameFirst:
                         arLines.append(self.vcardFold('N:' + arNames[0] + ';' + arNames[1]))
                     else:
                         arLines.append(self.vcardFold('N:' + arNames[1] + ';' + arNames[0]))
 
             # SORT-STRING
             sSortString = self.getPropertyValue(elmCard, 'sort-string', self.STRING, bAutoEscape=1)
             if sSortString:
                 arLines.append(self.vcardFold('SORT-STRING:' + sSortString))
 
             # NICKNAME
             arNickname = self.getPropertyValue(elmCard, 'nickname', self.STRING, 1, 1)
             if arNickname:
                 arLines.append(self.vcardFold('NICKNAME:' + ','.join(arNickname)))
 
             # PHOTO
             processSingleURI('photo')
 
             # BDAY
             dtBday = self.getPropertyValue(elmCard, 'bday', self.DATE)
             if dtBday:
                 arLines.append(self.vcardFold('BDAY:' + self.toISO8601(dtBday)))
 
             # ADR (address)
             arAdr = self.getPropertyValue(elmCard, 'adr', bAllowMultiple=1)
             for elmAdr in arAdr:
                 arType = self.getPropertyValue(elmAdr, 'type', self.STRING, 1, 1)
                 if not arType:
                     arType = ['intl','postal','parcel','work'] # default adr types, see RFC 2426 section 3.2.1
                 sPostOfficeBox = self.getPropertyValue(elmAdr, 'post-office-box', self.STRING, 0, 1)
                 sExtendedAddress = self.getPropertyValue(elmAdr, 'extended-address', self.STRING, 0, 1)
                 sStreetAddress = self.getPropertyValue(elmAdr, 'street-address', self.STRING, 0, 1)
                 sLocality = self.getPropertyValue(elmAdr, 'locality', self.STRING, 0, 1)
                 sRegion = self.getPropertyValue(elmAdr, 'region', self.STRING, 0, 1)
                 sPostalCode = self.getPropertyValue(elmAdr, 'postal-code', self.STRING, 0, 1)
                 sCountryName = self.getPropertyValue(elmAdr, 'country-name', self.STRING, 0, 1)
                 arLines.append(self.vcardFold('ADR;TYPE=' + ','.join(arType) + ':' +
                                          sPostOfficeBox + ';' +
                                          sExtendedAddress + ';' +
                                          sStreetAddress + ';' +
                                          sLocality + ';' +
                                          sRegion + ';' +
                                          sPostalCode + ';' +
                                          sCountryName))
 
             # LABEL
             processTypeValue('label', ['intl','postal','parcel','work'])
 
             # TEL (phone number)
             processTypeValue('tel', ['voice'])
 
             # EMAIL
             processTypeValue('email', ['internet'], ['internet'])
 
             # MAILER
             processSingleString('mailer')
 
             # TZ (timezone)
             processSingleString('tz')
 
             # GEO (geographical information)
             elmGeo = self.getPropertyValue(elmCard, 'geo')
             if elmGeo:
                 sLatitude = self.getPropertyValue(elmGeo, 'latitude', self.STRING, 0, 1)
                 sLongitude = self.getPropertyValue(elmGeo, 'longitude', self.STRING, 0, 1)
                 arLines.append(self.vcardFold('GEO:' + sLatitude + ';' + sLongitude))
 
             # TITLE
             processSingleString('title')
 
             # ROLE
             processSingleString('role')
 
             # LOGO
             processSingleURI('logo')
 
             # ORG (organization)
             elmOrg = self.getPropertyValue(elmCard, 'org')
             if elmOrg:
                 sOrganizationName = self.getPropertyValue(elmOrg, 'organization-name', self.STRING, 0, 1)
                 if not sOrganizationName:
                     # implied "organization-name" optimization
                     # http://microformats.org/wiki/hcard#Implied_.22organization-name.22_Optimization
                     sOrganizationName = self.getPropertyValue(elmCard, 'org', self.STRING, 0, 1)
                     if sOrganizationName:
                         arLines.append(self.vcardFold('ORG:' + sOrganizationName))
                 else:
                     arOrganizationUnit = self.getPropertyValue(elmOrg, 'organization-unit', self.STRING, 1, 1)
                     arLines.append(self.vcardFold('ORG:' + sOrganizationName + ';' + ';'.join(arOrganizationUnit)))
 
             # CATEGORY
             arCategory = self.getPropertyValue(elmCard, 'category', self.STRING, 1, 1) + self.getPropertyValue(elmCard, 'categories', self.STRING, 1, 1)
             if arCategory:
                 arLines.append(self.vcardFold('CATEGORIES:' + ','.join(arCategory)))
 
             # NOTE
             processSingleString('note')
 
             # REV
             processSingleString('rev')
 
             # SOUND
             processSingleURI('sound')
 
             # UID
             processSingleString('uid')
 
             # URL
             processSingleURI('url')
 
             # CLASS
             processSingleString('class')
 
             # KEY
             processSingleURI('key')
 
             if arLines:
                 arLines = ['BEGIN:vCard','VERSION:3.0'] + arLines + ['END:vCard']
                 sVCards += '\n'.join(arLines) + '\n'
 
         return sVCards.strip()
 
     def isProbablyDownloadable(self, elm):
         attrsD = elm.attrMap
         if not attrsD.has_key('href'): return 0
         linktype = attrsD.get('type', '').strip()
         if linktype.startswith('audio/') or \
            linktype.startswith('video/') or \
            (linktype.startswith('application/') and not linktype.endswith('xml')):
             return 1
         path = urlparse.urlparse(attrsD['href'])[2]
         if path.find('.') == -1: return 0
         fileext = path.split('.').pop().lower()
         return fileext in self.known_binary_extensions
 
     def findTags(self):
         all = lambda x: 1
         for elm in self.document(all, {'rel': re.compile(r'\btag\b')}):
             href = elm.get('href')
             if not href: continue
             urlscheme, domain, path, params, query, fragment = \
                        urlparse.urlparse(_urljoin(self.baseuri, href))
             segments = path.split('/')
             tag = segments.pop()
             if not tag:
                 tag = segments.pop()
             tagscheme = urlparse.urlunparse((urlscheme, domain, '/'.join(segments), '', '', ''))
             if not tagscheme.endswith('/'):
                 tagscheme += '/'
             self.tags.append(FeedParserDict({"term": tag, "scheme": tagscheme, "label": elm.string or ''}))
 
     def findEnclosures(self):
         all = lambda x: 1
         enclosure_match = re.compile(r'\benclosure\b')
         for elm in self.document(all, {'href': re.compile(r'.+')}):
             if not enclosure_match.search(elm.get('rel', '')) and not self.isProbablyDownloadable(elm): continue
             if elm.attrMap not in self.enclosures:
                 self.enclosures.append(elm.attrMap)
                 if elm.string and not elm.get('title'):
                     self.enclosures[-1]['title'] = elm.string
 
     def findXFN(self):
         all = lambda x: 1
         for elm in self.document(all, {'rel': re.compile('.+'), 'href': re.compile('.+')}):
             rels = elm.get('rel', '').split()
             xfn_rels = []
             for rel in rels:
                 if rel in self.known_xfn_relationships:
                     xfn_rels.append(rel)
             if xfn_rels:
                 self.xfn.append({"relationships": xfn_rels, "href": elm.get('href', ''), "name": elm.string})
 
 def _parseMicroformats(htmlSource, baseURI, encoding):
     if not BeautifulSoup: return
     if _debug: sys.stderr.write('entering _parseMicroformats\n')
     p = _MicroformatsParser(htmlSource, baseURI, encoding)
     p.vcard = p.findVCards(p.document)
     p.findTags()
     p.findEnclosures()
     p.findXFN()
     return {"tags": p.tags, "enclosures": p.enclosures, "xfn": p.xfn, "vcard": p.vcard}
 
 class _RelativeURIResolver(_BaseHTMLProcessor):
     relative_uris = [('a', 'href'),
                      ('applet', 'codebase'),
                      ('area', 'href'),
                      ('blockquote', 'cite'),
                      ('body', 'background'),
                      ('del', 'cite'),
                      ('form', 'action'),
                      ('frame', 'longdesc'),
                      ('frame', 'src'),
                      ('iframe', 'longdesc'),
                      ('iframe', 'src'),
                      ('head', 'profile'),
                      ('img', 'longdesc'),
                      ('img', 'src'),
                      ('img', 'usemap'),
                      ('input', 'src'),
                      ('input', 'usemap'),
                      ('ins', 'cite'),
                      ('link', 'href'),
                      ('object', 'classid'),
                      ('object', 'codebase'),
                      ('object', 'data'),
                      ('object', 'usemap'),
                      ('q', 'cite'),
                      ('script', 'src')]
 
     def __init__(self, baseuri, encoding, type):
         _BaseHTMLProcessor.__init__(self, encoding, type)
         self.baseuri = baseuri
 
     def resolveURI(self, uri):
         return _urljoin(self.baseuri, uri.strip())
 
     def unknown_starttag(self, tag, attrs):
         attrs = self.normalize_attrs(attrs)
         attrs = [(key, ((tag, key) in self.relative_uris) and self.resolveURI(value) or value) for key, value in attrs]
         _BaseHTMLProcessor.unknown_starttag(self, tag, attrs)
 
 def _resolveRelativeURIs(htmlSource, baseURI, encoding, type):
     if _debug: sys.stderr.write('entering _resolveRelativeURIs\n')
     p = _RelativeURIResolver(baseURI, encoding, type)
     p.feed(htmlSource)
     return p.output()
 
 class _HTMLSanitizer(_BaseHTMLProcessor):
     acceptable_elements = ['a', 'abbr', 'acronym', 'address', 'area', 'article',
       'aside', 'audio', 'b', 'big', 'blockquote', 'br', 'button', 'canvas',
       'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'command',
       'datagrid', 'datalist', 'dd', 'del', 'details', 'dfn', 'dialog', 'dir',
       'div', 'dl', 'dt', 'em', 'event-source', 'fieldset', 'figure', 'footer',
       'font', 'form', 'header', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i',
       'img', 'input', 'ins', 'keygen', 'kbd', 'label', 'legend', 'li', 'm', 'map',
       'menu', 'meter', 'multicol', 'nav', 'nextid', 'ol', 'output', 'optgroup',
       'option', 'p', 'pre', 'progress', 'q', 's', 'samp', 'section', 'select',
       'small', 'sound', 'source', 'spacer', 'span', 'strike', 'strong', 'sub',
       'sup', 'table', 'tbody', 'td', 'textarea', 'time', 'tfoot', 'th', 'thead',
       'tr', 'tt', 'u', 'ul', 'var', 'video', 'noscript']
 
     acceptable_attributes = ['abbr', 'accept', 'accept-charset', 'accesskey',
       'action', 'align', 'alt', 'autoplay', 'autocomplete', 'autofocus', 'axis',
       'background', 'balance', 'bgcolor', 'bgproperties', 'border',
       'bordercolor', 'bordercolordark', 'bordercolorlight', 'bottompadding',
       'cellpadding', 'cellspacing', 'ch', 'challenge', 'char', 'charoff',
       'choff', 'charset', 'checked', 'cite', 'class', 'clear', 'color', 'cols',
       'colspan', 'compact', 'contenteditable', 'coords', 'data', 'datafld',
       'datapagesize', 'datasrc', 'datetime', 'default', 'delay', 'dir',
       'disabled', 'draggable', 'dynsrc', 'enctype', 'end', 'face', 'for',
       'form', 'frame', 'galleryimg', 'gutter', 'headers', 'height', 'hidefocus',
       'hidden', 'high', 'href', 'hreflang', 'hspace', 'icon', 'id', 'inputmode',
       'ismap', 'keytype', 'label', 'leftspacing', 'lang', 'list', 'longdesc',
       'loop', 'loopcount', 'loopend', 'loopstart', 'low', 'lowsrc', 'max',
       'maxlength', 'media', 'method', 'min', 'multiple', 'name', 'nohref',
       'noshade', 'nowrap', 'open', 'optimum', 'pattern', 'ping', 'point-size',
       'prompt', 'pqg', 'radiogroup', 'readonly', 'rel', 'repeat-max',
       'repeat-min', 'replace', 'required', 'rev', 'rightspacing', 'rows',
       'rowspan', 'rules', 'scope', 'selected', 'shape', 'size', 'span', 'src',
       'start', 'step', 'summary', 'suppress', 'tabindex', 'target', 'template',
       'title', 'toppadding', 'type', 'unselectable', 'usemap', 'urn', 'valign',
       'value', 'variable', 'volume', 'vspace', 'vrml', 'width', 'wrap',
       'xml:lang']
 
     unacceptable_elements_with_end_tag = ['script', 'applet', 'style']
 
     acceptable_css_properties = ['azimuth', 'background-color',
       'border-bottom-color', 'border-collapse', 'border-color',
       'border-left-color', 'border-right-color', 'border-top-color', 'clear',
       'color', 'cursor', 'direction', 'display', 'elevation', 'float', 'font',
       'font-family', 'font-size', 'font-style', 'font-variant', 'font-weight',
       'height', 'letter-spacing', 'line-height', 'overflow', 'pause',
       'pause-after', 'pause-before', 'pitch', 'pitch-range', 'richness',
       'speak', 'speak-header', 'speak-numeral', 'speak-punctuation',
       'speech-rate', 'stress', 'text-align', 'text-decoration', 'text-indent',
       'unicode-bidi', 'vertical-align', 'voice-family', 'volume',
       'white-space', 'width']
 
     # survey of common keywords found in feeds
     acceptable_css_keywords = ['auto', 'aqua', 'black', 'block', 'blue',
       'bold', 'both', 'bottom', 'brown', 'center', 'collapse', 'dashed',
       'dotted', 'fuchsia', 'gray', 'green', '!important', 'italic', 'left',
       'lime', 'maroon', 'medium', 'none', 'navy', 'normal', 'nowrap', 'olive',
       'pointer', 'purple', 'red', 'right', 'solid', 'silver', 'teal', 'top',
       'transparent', 'underline', 'white', 'yellow']
 
     valid_css_values = re.compile('^(#[0-9a-f]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|' +
       '\d{0,2}\.?\d{0,2}(cm|em|ex|in|mm|pc|pt|px|%|,|\))?)$')
 
     mathml_elements = ['annotation', 'annotation-xml', 'maction', 'math',
       'merror', 'mfenced', 'mfrac', 'mi', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded',
       'mphantom', 'mprescripts', 'mroot', 'mrow', 'mspace', 'msqrt', 'mstyle',
       'msub', 'msubsup', 'msup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder',
       'munderover', 'none', 'semantics']
 
     mathml_attributes = ['actiontype', 'align', 'columnalign', 'columnalign',
       'columnalign', 'close', 'columnlines', 'columnspacing', 'columnspan', 'depth',
       'display', 'displaystyle', 'encoding', 'equalcolumns', 'equalrows',
       'fence', 'fontstyle', 'fontweight', 'frame', 'height', 'linethickness',
       'lspace', 'mathbackground', 'mathcolor', 'mathvariant', 'mathvariant',
       'maxsize', 'minsize', 'open', 'other', 'rowalign', 'rowalign', 'rowalign',
       'rowlines', 'rowspacing', 'rowspan', 'rspace', 'scriptlevel', 'selection',
       'separator', 'separators', 'stretchy', 'width', 'width', 'xlink:href',
       'xlink:show', 'xlink:type', 'xmlns', 'xmlns:xlink']
 
     # svgtiny - foreignObject + linearGradient + radialGradient + stop
     svg_elements = ['a', 'animate', 'animateColor', 'animateMotion',
       'animateTransform', 'circle', 'defs', 'desc', 'ellipse', 'foreignObject',
       'font-face', 'font-face-name', 'font-face-src', 'g', 'glyph', 'hkern',
       'linearGradient', 'line', 'marker', 'metadata', 'missing-glyph', 'mpath',
       'path', 'polygon', 'polyline', 'radialGradient', 'rect', 'set', 'stop',
       'svg', 'switch', 'text', 'title', 'tspan', 'use']
 
     # svgtiny + class + opacity + offset + xmlns + xmlns:xlink
     svg_attributes = ['accent-height', 'accumulate', 'additive', 'alphabetic',
        'arabic-form', 'ascent', 'attributeName', 'attributeType',
        'baseProfile', 'bbox', 'begin', 'by', 'calcMode', 'cap-height',
        'class', 'color', 'color-rendering', 'content', 'cx', 'cy', 'd', 'dx',
        'dy', 'descent', 'display', 'dur', 'end', 'fill', 'fill-opacity',
        'fill-rule', 'font-family', 'font-size', 'font-stretch', 'font-style',
        'font-variant', 'font-weight', 'from', 'fx', 'fy', 'g1', 'g2',
        'glyph-name', 'gradientUnits', 'hanging', 'height', 'horiz-adv-x',
        'horiz-origin-x', 'id', 'ideographic', 'k', 'keyPoints', 'keySplines',
        'keyTimes', 'lang', 'mathematical', 'marker-end', 'marker-mid',
        'marker-start', 'markerHeight', 'markerUnits', 'markerWidth', 'max',
        'min', 'name', 'offset', 'opacity', 'orient', 'origin',
        'overline-position', 'overline-thickness', 'panose-1', 'path',
        'pathLength', 'points', 'preserveAspectRatio', 'r', 'refX', 'refY',
        'repeatCount', 'repeatDur', 'requiredExtensions', 'requiredFeatures',
        'restart', 'rotate', 'rx', 'ry', 'slope', 'stemh', 'stemv',
        'stop-color', 'stop-opacity', 'strikethrough-position',
        'strikethrough-thickness', 'stroke', 'stroke-dasharray',
        'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin',
        'stroke-miterlimit', 'stroke-opacity', 'stroke-width', 'systemLanguage',
        'target', 'text-anchor', 'to', 'transform', 'type', 'u1', 'u2',
        'underline-position', 'underline-thickness', 'unicode', 'unicode-range',
        'units-per-em', 'values', 'version', 'viewBox', 'visibility', 'width',
        'widths', 'x', 'x-height', 'x1', 'x2', 'xlink:actuate', 'xlink:arcrole',
        'xlink:href', 'xlink:role', 'xlink:show', 'xlink:title', 'xlink:type',
        'xml:base', 'xml:lang', 'xml:space', 'xmlns', 'xmlns:xlink', 'y', 'y1',
        'y2', 'zoomAndPan']
 
     svg_attr_map = None
     svg_elem_map = None
 
     acceptable_svg_properties = [ 'fill', 'fill-opacity', 'fill-rule',
       'stroke', 'stroke-width', 'stroke-linecap', 'stroke-linejoin',
       'stroke-opacity']
 
     def reset(self):
         _BaseHTMLProcessor.reset(self)
         self.unacceptablestack = 0
         self.mathmlOK = 0
         self.svgOK = 0
 
     def unknown_starttag(self, tag, attrs):
         acceptable_attributes = self.acceptable_attributes
         keymap = {}
         if not tag in self.acceptable_elements or self.svgOK:
             if tag in self.unacceptable_elements_with_end_tag:
                 self.unacceptablestack += 1
 
             # not otherwise acceptable, perhaps it is MathML or SVG?
             if tag=='math' and ('xmlns','http://www.w3.org/1998/Math/MathML') in attrs:
                 self.mathmlOK += 1
             if tag=='svg' and ('xmlns','http://www.w3.org/2000/svg') in attrs:
                 self.svgOK += 1
 
             # chose acceptable attributes based on tag class, else bail
             if  self.mathmlOK and tag in self.mathml_elements:
                 acceptable_attributes = self.mathml_attributes
             elif self.svgOK and tag in self.svg_elements:
                 # for most vocabularies, lowercasing is a good idea.  Many
                 # svg elements, however, are camel case
                 if not self.svg_attr_map:
                     lower=[attr.lower() for attr in self.svg_attributes]
                     mix=[a for a in self.svg_attributes if a not in lower]
                     self.svg_attributes = lower
                     self.svg_attr_map = dict([(a.lower(),a) for a in mix])
 
                     lower=[attr.lower() for attr in self.svg_elements]
                     mix=[a for a in self.svg_elements if a not in lower]
                     self.svg_elements = lower
                     self.svg_elem_map = dict([(a.lower(),a) for a in mix])
                 acceptable_attributes = self.svg_attributes
                 tag = self.svg_elem_map.get(tag,tag)
                 keymap = self.svg_attr_map
             elif not tag in self.acceptable_elements:
                 return
 
         # declare xlink namespace, if needed
         if self.mathmlOK or self.svgOK:
             if filter(lambda (n,v): n.startswith('xlink:'),attrs):
                 if not ('xmlns:xlink','http://www.w3.org/1999/xlink') in attrs:
                     attrs.append(('xmlns:xlink','http://www.w3.org/1999/xlink'))
 
         clean_attrs = []
         for key, value in self.normalize_attrs(attrs):
             if key in acceptable_attributes:
                 key=keymap.get(key,key)
                 clean_attrs.append((key,value))
             elif key=='style':
                 clean_value = self.sanitize_style(value)
                 if clean_value: clean_attrs.append((key,clean_value))
         _BaseHTMLProcessor.unknown_starttag(self, tag, clean_attrs)
 
     def unknown_endtag(self, tag):
         if not tag in self.acceptable_elements:
             if tag in self.unacceptable_elements_with_end_tag:
                 self.unacceptablestack -= 1
             if self.mathmlOK and tag in self.mathml_elements:
                 if tag == 'math' and self.mathmlOK: self.mathmlOK -= 1
             elif self.svgOK and tag in self.svg_elements:
                 tag = self.svg_elem_map.get(tag,tag)
                 if tag == 'svg' and self.svgOK: self.svgOK -= 1
             else:
                 return
         _BaseHTMLProcessor.unknown_endtag(self, tag)
 
     def handle_pi(self, text):
         pass
 
     def handle_decl(self, text):
         pass
 
     def handle_data(self, text):
         if not self.unacceptablestack:
             _BaseHTMLProcessor.handle_data(self, text)
 
     def sanitize_style(self, style):
         # disallow urls
         style=re.compile('url\s*\(\s*[^\s)]+?\s*\)\s*').sub(' ',style)
 
         # gauntlet
         if not re.match("""^([:,;#%.\sa-zA-Z0-9!]|\w-\w|'[\s\w]+'|"[\s\w]+"|\([\d,\s]+\))*$""", style): return ''
         if not re.match("^(\s*[-\w]+\s*:\s*[^:;]*(;|$))*$", style): return ''
 
         clean = []
         for prop,value in re.findall("([-\w]+)\s*:\s*([^:;]*)",style):
           if not value: continue
           if prop.lower() in self.acceptable_css_properties:
               clean.append(prop + ': ' + value + ';')
           elif prop.split('-')[0].lower() in ['background','border','margin','padding']:
               for keyword in value.split():
                   if not keyword in self.acceptable_css_keywords and \
                       not self.valid_css_values.match(keyword):
                       break
               else:
                   clean.append(prop + ': ' + value + ';')
           elif self.svgOK and prop.lower() in self.acceptable_svg_properties:
               clean.append(prop + ': ' + value + ';')
 
         return ' '.join(clean)
 
 
 def _sanitizeHTML(htmlSource, encoding, type):
     p = _HTMLSanitizer(encoding, type)
     p.feed(htmlSource)
     data = p.output()
     if TIDY_MARKUP:
         # loop through list of preferred Tidy interfaces looking for one that's installed,
         # then set up a common _tidy function to wrap the interface-specific API.
         _tidy = None
         for tidy_interface in PREFERRED_TIDY_INTERFACES:
             try:
                 if tidy_interface == "uTidy":
                     from tidy import parseString as _utidy
                     def _tidy(data, **kwargs):
                         return str(_utidy(data, **kwargs))
                     break
                 elif tidy_interface == "mxTidy":
                     from mx.Tidy import Tidy as _mxtidy
                     def _tidy(data, **kwargs):
                         nerrors, nwarnings, data, errordata = _mxtidy.tidy(data, **kwargs)
                         return data
                     break
             except:
                 pass
         if _tidy:
             utf8 = type(data) == type(u'')
             if utf8:
                 data = data.encode('utf-8')
             data = _tidy(data, output_xhtml=1, numeric_entities=1, wrap=0, char_encoding="utf8")
             if utf8:
                 data = unicode(data, 'utf-8')
             if data.count('<body'):
                 data = data.split('<body', 1)[1]
                 if data.count('>'):
                     data = data.split('>', 1)[1]
             if data.count('</body'):
                 data = data.split('</body', 1)[0]
     data = data.strip().replace('\r\n', '\n')
     return data
 
 class _FeedURLHandler(urllib2.HTTPDigestAuthHandler, urllib2.HTTPRedirectHandler, urllib2.HTTPDefaultErrorHandler):
     def http_error_default(self, req, fp, code, msg, headers):
         if ((code / 100) == 3) and (code != 304):
             return self.http_error_302(req, fp, code, msg, headers)
         infourl = urllib.addinfourl(fp, headers, req.get_full_url())
         infourl.status = code
         return infourl
 
     def http_error_302(self, req, fp, code, msg, headers):
         if headers.dict.has_key('location'):
             infourl = urllib2.HTTPRedirectHandler.http_error_302(self, req, fp, code, msg, headers)
         else:
             infourl = urllib.addinfourl(fp, headers, req.get_full_url())
         if not hasattr(infourl, 'status'):
             infourl.status = code
         return infourl
 
     def http_error_301(self, req, fp, code, msg, headers):
         if headers.dict.has_key('location'):
             infourl = urllib2.HTTPRedirectHandler.http_error_301(self, req, fp, code, msg, headers)
         else:
             infourl = urllib.addinfourl(fp, headers, req.get_full_url())
         if not hasattr(infourl, 'status'):
             infourl.status = code
         return infourl
 
     http_error_300 = http_error_302
     http_error_303 = http_error_302
     http_error_307 = http_error_302
 
     def http_error_401(self, req, fp, code, msg, headers):
         # Check if
         # - server requires digest auth, AND
         # - we tried (unsuccessfully) with basic auth, AND
         # - we're using Python 2.3.3 or later (digest auth is irreparably broken in earlier versions)
         # If all conditions hold, parse authentication information
         # out of the Authorization header we sent the first time
         # (for the username and password) and the WWW-Authenticate
         # header the server sent back (for the realm) and retry
         # the request with the appropriate digest auth headers instead.
         # This evil genius hack has been brought to you by Aaron Swartz.
         host = urlparse.urlparse(req.get_full_url())[1]
         try:
             assert sys.version.split()[0] >= '2.3.3'
             assert base64 != None
             user, passw = base64.decodestring(req.headers['Authorization'].split(' ')[1]).split(':')
             realm = re.findall('realm="([^"]*)"', headers['WWW-Authenticate'])[0]
             self.add_password(realm, host, user, passw)
             retry = self.http_error_auth_reqed('www-authenticate', host, req, headers)
             self.reset_retry_count()
             return retry
         except:
             return self.http_error_default(req, fp, code, msg, headers)
 
 def _open_resource(url_file_stream_or_string, etag, modified, agent, referrer, handlers):
     """URL, filename, or string --> stream
 
     This function lets you define parsers that take any input source
     (URL, pathname to local or network file, or actual data as a string)
     and deal with it in a uniform manner.  Returned object is guaranteed
     to have all the basic stdio read methods (read, readline, readlines).
     Just .close() the object when you're done with it.
 
     If the etag argument is supplied, it will be used as the value of an
     If-None-Match request header.
 
     If the modified argument is supplied, it can be a tuple of 9 integers
     (as returned by gmtime() in the standard Python time module) or a date
     string in any format supported by feedparser. Regardless, it MUST
     be in GMT (Greenwich Mean Time). It will be reformatted into an
     RFC 1123-compliant date and used as the value of an If-Modified-Since
     request header.
 
     If the agent argument is supplied, it will be used as the value of a
     User-Agent request header.
 
     If the referrer argument is supplied, it will be used as the value of a
     Referer[sic] request header.
 
     If handlers is supplied, it is a list of handlers used to build a
     urllib2 opener.
     """
 
     if hasattr(url_file_stream_or_string, 'read'):
         return url_file_stream_or_string
 
     if url_file_stream_or_string == '-':
         return sys.stdin
 
     if urlparse.urlparse(url_file_stream_or_string)[0] in ('http', 'https', 'ftp'):
         if not agent:
             agent = USER_AGENT
         # test for inline user:password for basic auth
         auth = None
         if base64:
             urltype, rest = urllib.splittype(url_file_stream_or_string)
             realhost, rest = urllib.splithost(rest)
             if realhost:
                 user_passwd, realhost = urllib.splituser(realhost)
                 if user_passwd:
                     url_file_stream_or_string = '%s://%s%s' % (urltype, realhost, rest)
                     auth = base64.encodestring(user_passwd).strip()
 
         # iri support
         try:
             if isinstance(url_file_stream_or_string,unicode):
                 url_file_stream_or_string = url_file_stream_or_string.encode('idna')
             else:
                 url_file_stream_or_string = url_file_stream_or_string.decode('utf-8').encode('idna')
         except:
             pass
 
         # try to open with urllib2 (to use optional headers)
         request = urllib2.Request(url_file_stream_or_string)
         request.add_header('User-Agent', agent)
         if etag:
             request.add_header('If-None-Match', etag)
         if type(modified) == type(''):
             modified = _parse_date(modified)
         if modified:
             # format into an RFC 1123-compliant timestamp. We can't use
             # time.strftime() since the %a and %b directives can be affected
             # by the current locale, but RFC 2616 states that dates must be
             # in English.
             short_weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
             months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
             request.add_header('If-Modified-Since', '%s, %02d %s %04d %02d:%02d:%02d GMT' % (short_weekdays[modified[6]], modified[2], months[modified[1] - 1], modified[0], modified[3], modified[4], modified[5]))
         if referrer:
             request.add_header('Referer', referrer)
         if gzip and zlib:
             request.add_header('Accept-encoding', 'gzip, deflate')
         elif gzip:
             request.add_header('Accept-encoding', 'gzip')
         elif zlib:
             request.add_header('Accept-encoding', 'deflate')
         else:
             request.add_header('Accept-encoding', '')
         if auth:
             request.add_header('Authorization', 'Basic %s' % auth)
         if ACCEPT_HEADER:
             request.add_header('Accept', ACCEPT_HEADER)
         request.add_header('A-IM', 'feed') # RFC 3229 support
         opener = apply(urllib2.build_opener, tuple([_FeedURLHandler()] + handlers))
         opener.addheaders = [] # RMK - must clear so we only send our custom User-Agent
         try:
             return opener.open(request)
         finally:
             opener.close() # JohnD
 
     # try to open with native open function (if url_file_stream_or_string is a filename)
     try:
         return open(url_file_stream_or_string)
     except:
         pass
 
     # treat url_file_stream_or_string as string
     return _StringIO(str(url_file_stream_or_string))
 
 _date_handlers = []
 def registerDateHandler(func):
     '''Register a date handler function (takes string, returns 9-tuple date in GMT)'''
     _date_handlers.insert(0, func)
 
 # ISO-8601 date parsing routines written by Fazal Majid.
 # The ISO 8601 standard is very convoluted and irregular - a full ISO 8601
 # parser is beyond the scope of feedparser and would be a worthwhile addition
 # to the Python library.
 # A single regular expression cannot parse ISO 8601 date formats into groups
 # as the standard is highly irregular (for instance is 030104 2003-01-04 or
 # 0301-04-01), so we use templates instead.
 # Please note the order in templates is significant because we need a
 # greedy match.
 _iso8601_tmpl = ['YYYY-?MM-?DD', 'YYYY-0MM?-?DD', 'YYYY-MM', 'YYYY-?OOO',
                 'YY-?MM-?DD', 'YY-?OOO', 'YYYY',
                 '-YY-?MM', '-OOO', '-YY',
                 '--MM-?DD', '--MM',
                 '---DD',
                 'CC', '']
 _iso8601_re = [
     tmpl.replace(
     'YYYY', r'(?P<year>\d{4})').replace(
     'YY', r'(?P<year>\d\d)').replace(
     'MM', r'(?P<month>[01]\d)').replace(
     'DD', r'(?P<day>[0123]\d)').replace(
     'OOO', r'(?P<ordinal>[0123]\d\d)').replace(
     'CC', r'(?P<century>\d\d$)')
     + r'(T?(?P<hour>\d{2}):(?P<minute>\d{2})'
     + r'(:(?P<second>\d{2}(\.\d*)?))?'
     + r'(?P<tz>[+-](?P<tzhour>\d{2})(:(?P<tzmin>\d{2}))?|Z)?)?'
     for tmpl in _iso8601_tmpl]
 del tmpl
 _iso8601_matches = [re.compile(regex).match for regex in _iso8601_re]
 del regex
 def _parse_date_iso8601(dateString):
     '''Parse a variety of ISO-8601-compatible formats like 20040105'''
     m = None
     for _iso8601_match in _iso8601_matches:
         m = _iso8601_match(dateString)
         if m: break
     if not m: return
     if m.span() == (0, 0): return
     params = m.groupdict()
     ordinal = params.get('ordinal', 0)
     if ordinal:
         ordinal = int(ordinal)
     else:
         ordinal = 0
     year = params.get('year', '--')
     if not year or year == '--':
         year = time.gmtime()[0]
     elif len(year) == 2:
         # ISO 8601 assumes current century, i.e. 93 -> 2093, NOT 1993
         year = 100 * int(time.gmtime()[0] / 100) + int(year)
     else:
         year = int(year)
     month = params.get('month', '-')
     if not month or month == '-':
         # ordinals are NOT normalized by mktime, we simulate them
         # by setting month=1, day=ordinal
         if ordinal:
             month = 1
         else:
             month = time.gmtime()[1]
     month = int(month)
     day = params.get('day', 0)
     if not day:
         # see above
         if ordinal:
             day = ordinal
         elif params.get('century', 0) or \
                  params.get('year', 0) or params.get('month', 0):
             day = 1
         else:
             day = time.gmtime()[2]
     else:
         day = int(day)
     # special case of the century - is the first year of the 21st century
     # 2000 or 2001 ? The debate goes on...
     if 'century' in params.keys():
         year = (int(params['century']) - 1) * 100 + 1
     # in ISO 8601 most fields are optional
     for field in ['hour', 'minute', 'second', 'tzhour', 'tzmin']:
         if not params.get(field, None):
             params[field] = 0
     hour = int(params.get('hour', 0))
     minute = int(params.get('minute', 0))
     second = int(float(params.get('second', 0)))
     # weekday is normalized by mktime(), we can ignore it
     weekday = 0
     daylight_savings_flag = -1
     tm = [year, month, day, hour, minute, second, weekday,
           ordinal, daylight_savings_flag]
     # ISO 8601 time zone adjustments
     tz = params.get('tz')
     if tz and tz != 'Z':
         if tz[0] == '-':
             tm[3] += int(params.get('tzhour', 0))
             tm[4] += int(params.get('tzmin', 0))
         elif tz[0] == '+':
             tm[3] -= int(params.get('tzhour', 0))
             tm[4] -= int(params.get('tzmin', 0))
         else:
             return None
     # Python's time.mktime() is a wrapper around the ANSI C mktime(3c)
     # which is guaranteed to normalize d/m/y/h/m/s.
     # Many implementations have bugs, but we'll pretend they don't.
     return time.localtime(time.mktime(tm))
 registerDateHandler(_parse_date_iso8601)
 
 # 8-bit date handling routines written by ytrewq1.
 _korean_year  = u'\ub144' # b3e2 in euc-kr
 _korean_month = u'\uc6d4' # bff9 in euc-kr
 _korean_day   = u'\uc77c' # c0cf in euc-kr
 _korean_am    = u'\uc624\uc804' # bfc0 c0fc in euc-kr
 _korean_pm    = u'\uc624\ud6c4' # bfc0 c8c4 in euc-kr
 
 _korean_onblog_date_re = \
     re.compile('(\d{4})%s\s+(\d{2})%s\s+(\d{2})%s\s+(\d{2}):(\d{2}):(\d{2})' % \
                (_korean_year, _korean_month, _korean_day))
 _korean_nate_date_re = \
     re.compile(u'(\d{4})-(\d{2})-(\d{2})\s+(%s|%s)\s+(\d{,2}):(\d{,2}):(\d{,2})' % \
                (_korean_am, _korean_pm))
 def _parse_date_onblog(dateString):
     '''Parse a string according to the OnBlog 8-bit date format'''
     m = _korean_onblog_date_re.match(dateString)
     if not m: return
     w3dtfdate = '%(year)s-%(month)s-%(day)sT%(hour)s:%(minute)s:%(second)s%(zonediff)s' % \
                 {'year': m.group(1), 'month': m.group(2), 'day': m.group(3),\
                  'hour': m.group(4), 'minute': m.group(5), 'second': m.group(6),\
                  'zonediff': '+09:00'}
     if _debug: sys.stderr.write('OnBlog date parsed as: %s\n' % w3dtfdate)
     return _parse_date_w3dtf(w3dtfdate)
 registerDateHandler(_parse_date_onblog)
 
 def _parse_date_nate(dateString):
     '''Parse a string according to the Nate 8-bit date format'''
     m = _korean_nate_date_re.match(dateString)
     if not m: return
     hour = int(m.group(5))
     ampm = m.group(4)
     if (ampm == _korean_pm):
         hour += 12
     hour = str(hour)
     if len(hour) == 1:
         hour = '0' + hour
     w3dtfdate = '%(year)s-%(month)s-%(day)sT%(hour)s:%(minute)s:%(second)s%(zonediff)s' % \
                 {'year': m.group(1), 'month': m.group(2), 'day': m.group(3),\
                  'hour': hour, 'minute': m.group(6), 'second': m.group(7),\
                  'zonediff': '+09:00'}
     if _debug: sys.stderr.write('Nate date parsed as: %s\n' % w3dtfdate)
     return _parse_date_w3dtf(w3dtfdate)
 registerDateHandler(_parse_date_nate)
 
 _mssql_date_re = \
     re.compile('(\d{4})-(\d{2})-(\d{2})\s+(\d{2}):(\d{2}):(\d{2})(\.\d+)?')
 def _parse_date_mssql(dateString):
     '''Parse a string according to the MS SQL date format'''
     m = _mssql_date_re.match(dateString)
     if not m: return
     w3dtfdate = '%(year)s-%(month)s-%(day)sT%(hour)s:%(minute)s:%(second)s%(zonediff)s' % \
                 {'year': m.group(1), 'month': m.group(2), 'day': m.group(3),\
                  'hour': m.group(4), 'minute': m.group(5), 'second': m.group(6),\
                  'zonediff': '+09:00'}
     if _debug: sys.stderr.write('MS SQL date parsed as: %s\n' % w3dtfdate)
     return _parse_date_w3dtf(w3dtfdate)
 registerDateHandler(_parse_date_mssql)
 
 # Unicode strings for Greek date strings
 _greek_months = \
   { \
    u'\u0399\u03b1\u03bd': u'Jan',       # c9e1ed in iso-8859-7
    u'\u03a6\u03b5\u03b2': u'Feb',       # d6e5e2 in iso-8859-7
    u'\u039c\u03ac\u03ce': u'Mar',       # ccdcfe in iso-8859-7
    u'\u039c\u03b1\u03ce': u'Mar',       # cce1fe in iso-8859-7
    u'\u0391\u03c0\u03c1': u'Apr',       # c1f0f1 in iso-8859-7
    u'\u039c\u03ac\u03b9': u'May',       # ccdce9 in iso-8859-7
    u'\u039c\u03b1\u03ca': u'May',       # cce1fa in iso-8859-7
    u'\u039c\u03b1\u03b9': u'May',       # cce1e9 in iso-8859-7
    u'\u0399\u03bf\u03cd\u03bd': u'Jun', # c9effded in iso-8859-7
    u'\u0399\u03bf\u03bd': u'Jun',       # c9efed in iso-8859-7
    u'\u0399\u03bf\u03cd\u03bb': u'Jul', # c9effdeb in iso-8859-7
    u'\u0399\u03bf\u03bb': u'Jul',       # c9f9eb in iso-8859-7
    u'\u0391\u03cd\u03b3': u'Aug',       # c1fde3 in iso-8859-7
    u'\u0391\u03c5\u03b3': u'Aug',       # c1f5e3 in iso-8859-7
    u'\u03a3\u03b5\u03c0': u'Sep',       # d3e5f0 in iso-8859-7
    u'\u039f\u03ba\u03c4': u'Oct',       # cfeaf4 in iso-8859-7
    u'\u039d\u03bf\u03ad': u'Nov',       # cdefdd in iso-8859-7
    u'\u039d\u03bf\u03b5': u'Nov',       # cdefe5 in iso-8859-7
    u'\u0394\u03b5\u03ba': u'Dec',       # c4e5ea in iso-8859-7
   }
 
 _greek_wdays = \
   { \
    u'\u039a\u03c5\u03c1': u'Sun', # caf5f1 in iso-8859-7
    u'\u0394\u03b5\u03c5': u'Mon', # c4e5f5 in iso-8859-7
    u'\u03a4\u03c1\u03b9': u'Tue', # d4f1e9 in iso-8859-7
    u'\u03a4\u03b5\u03c4': u'Wed', # d4e5f4 in iso-8859-7
    u'\u03a0\u03b5\u03bc': u'Thu', # d0e5ec in iso-8859-7
    u'\u03a0\u03b1\u03c1': u'Fri', # d0e1f1 in iso-8859-7
    u'\u03a3\u03b1\u03b2': u'Sat', # d3e1e2 in iso-8859-7
   }
 
 _greek_date_format_re = \
     re.compile(u'([^,]+),\s+(\d{2})\s+([^\s]+)\s+(\d{4})\s+(\d{2}):(\d{2}):(\d{2})\s+([^\s]+)')
 
 def _parse_date_greek(dateString):
     '''Parse a string according to a Greek 8-bit date format.'''
     m = _greek_date_format_re.match(dateString)
     if not m: return
     try:
         wday = _greek_wdays[m.group(1)]
         month = _greek_months[m.group(3)]
     except:
         return
     rfc822date = '%(wday)s, %(day)s %(month)s %(year)s %(hour)s:%(minute)s:%(second)s %(zonediff)s' % \
                  {'wday': wday, 'day': m.group(2), 'month': month, 'year': m.group(4),\
                   'hour': m.group(5), 'minute': m.group(6), 'second': m.group(7),\
                   'zonediff': m.group(8)}
     if _debug: sys.stderr.write('Greek date parsed as: %s\n' % rfc822date)
     return _parse_date_rfc822(rfc822date)
 registerDateHandler(_parse_date_greek)
 
 # Unicode strings for Hungarian date strings
 _hungarian_months = \
   { \
     u'janu\u00e1r':   u'01',  # e1 in iso-8859-2
     u'febru\u00e1ri': u'02',  # e1 in iso-8859-2
     u'm\u00e1rcius':  u'03',  # e1 in iso-8859-2
     u'\u00e1prilis':  u'04',  # e1 in iso-8859-2
     u'm\u00e1ujus':   u'05',  # e1 in iso-8859-2
     u'j\u00fanius':   u'06',  # fa in iso-8859-2
     u'j\u00falius':   u'07',  # fa in iso-8859-2
     u'augusztus':     u'08',
     u'szeptember':    u'09',
     u'okt\u00f3ber':  u'10',  # f3 in iso-8859-2
     u'november':      u'11',
     u'december':      u'12',
   }
 
 _hungarian_date_format_re = \
   re.compile(u'(\d{4})-([^-]+)-(\d{,2})T(\d{,2}):(\d{2})((\+|-)(\d{,2}:\d{2}))')
 
 def _parse_date_hungarian(dateString):
     '''Parse a string according to a Hungarian 8-bit date format.'''
     m = _hungarian_date_format_re.match(dateString)
     if not m: return
     try:
         month = _hungarian_months[m.group(2)]
         day = m.group(3)
         if len(day) == 1:
             day = '0' + day
         hour = m.group(4)
         if len(hour) == 1:
             hour = '0' + hour
     except:
         return
     w3dtfdate = '%(year)s-%(month)s-%(day)sT%(hour)s:%(minute)s%(zonediff)s' % \
                 {'year': m.group(1), 'month': month, 'day': day,\
                  'hour': hour, 'minute': m.group(5),\
                  'zonediff': m.group(6)}
     if _debug: sys.stderr.write('Hungarian date parsed as: %s\n' % w3dtfdate)
     return _parse_date_w3dtf(w3dtfdate)
 registerDateHandler(_parse_date_hungarian)
 
 # W3DTF-style date parsing adapted from PyXML xml.utils.iso8601, written by
 # Drake and licensed under the Python license.  Removed all range checking
 # for month, day, hour, minute, and second, since mktime will normalize
 # these later
 def _parse_date_w3dtf(dateString):
     def __extract_date(m):
         year = int(m.group('year'))
         if year < 100:
             year = 100 * int(time.gmtime()[0] / 100) + int(year)
         if year < 1000:
             return 0, 0, 0
         julian = m.group('julian')
         if julian:
             julian = int(julian)
             month = julian / 30 + 1
             day = julian % 30 + 1
             jday = None
             while jday != julian:
                 t = time.mktime((year, month, day, 0, 0, 0, 0, 0, 0))
                 jday = time.gmtime(t)[-2]
                 diff = abs(jday - julian)
                 if jday > julian:
                     if diff < day:
                         day = day - diff
                     else:
                         month = month - 1
                         day = 31
                 elif jday < julian:
                     if day + diff < 28:
                        day = day + diff
                     else:
                         month = month + 1
             return year, month, day
         month = m.group('month')
         day = 1
         if month is None:
             month = 1
         else:
             month = int(month)
             day = m.group('day')
             if day:
                 day = int(day)
             else:
                 day = 1
         return year, month, day
 
     def __extract_time(m):
         if not m:
             return 0, 0, 0
         hours = m.group('hours')
         if not hours:
             return 0, 0, 0
         hours = int(hours)
         minutes = int(m.group('minutes'))
         seconds = m.group('seconds')
         if seconds:
             seconds = int(seconds)
         else:
             seconds = 0
         return hours, minutes, seconds
 
     def __extract_tzd(m):
         '''Return the Time Zone Designator as an offset in seconds from UTC.'''
         if not m:
             return 0
         tzd = m.group('tzd')
         if not tzd:
             return 0
         if tzd == 'Z':
             return 0
         hours = int(m.group('tzdhours'))
         minutes = m.group('tzdminutes')
         if minutes:
             minutes = int(minutes)
         else:
             minutes = 0
         offset = (hours*60 + minutes) * 60
         if tzd[0] == '+':
             return -offset
         return offset
 
     __date_re = ('(?P<year>\d\d\d\d)'
                  '(?:(?P<dsep>-|)'
                  '(?:(?P<julian>\d\d\d)'
                  '|(?P<month>\d\d)(?:(?P=dsep)(?P<day>\d\d))?))?')
     __tzd_re = '(?P<tzd>[-+](?P<tzdhours>\d\d)(?::?(?P<tzdminutes>\d\d))|Z)'
     __tzd_rx = re.compile(__tzd_re)
     __time_re = ('(?P<hours>\d\d)(?P<tsep>:|)(?P<minutes>\d\d)'
                  '(?:(?P=tsep)(?P<seconds>\d\d(?:[.,]\d+)?))?'
                  + __tzd_re)
     __datetime_re = '%s(?:T%s)?' % (__date_re, __time_re)
     __datetime_rx = re.compile(__datetime_re)
     m = __datetime_rx.match(dateString)
     if (m is None) or (m.group() != dateString): return
     gmt = __extract_date(m) + __extract_time(m) + (0, 0, 0)
     if gmt[0] == 0: return
     return time.gmtime(time.mktime(gmt) + __extract_tzd(m) - time.timezone)
 registerDateHandler(_parse_date_w3dtf)
 
 def _parse_date_rfc822(dateString):
     '''Parse an RFC822, RFC1123, RFC2822, or asctime-style date'''
     data = dateString.split()
     if data[0][-1] in (',', '.') or data[0].lower() in rfc822._daynames:
         del data[0]
     if len(data) == 4:
         s = data[3]
         i = s.find('+')
         if i > 0:
             data[3:] = [s[:i], s[i+1:]]
         else:
             data.append('')
         dateString = " ".join(data)
     if len(data) < 5:
         dateString += ' 00:00:00 GMT'
     tm = rfc822.parsedate_tz(dateString)
     if tm:
         return time.gmtime(rfc822.mktime_tz(tm))
 # rfc822.py defines several time zones, but we define some extra ones.
 # 'ET' is equivalent to 'EST', etc.
 _additional_timezones = {'AT': -400, 'ET': -500, 'CT': -600, 'MT': -700, 'PT': -800}
 rfc822._timezones.update(_additional_timezones)
 registerDateHandler(_parse_date_rfc822)
 
 def _parse_date_perforce(aDateString):
         """parse a date in yyyy/mm/dd hh:mm:ss TTT format"""
         # Fri, 2006/09/15 08:19:53 EDT
         _my_date_pattern = re.compile( \
                 r'(\w{,3}), (\d{,4})/(\d{,2})/(\d{2}) (\d{,2}):(\d{2}):(\d{2}) (\w{,3})')
 
         dow, year, month, day, hour, minute, second, tz = \
                 _my_date_pattern.search(aDateString).groups()
         months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
         dateString = "%s, %s %s %s %s:%s:%s %s" % (dow, day, months[int(month) - 1], year, hour, minute, second, tz)
         tm = rfc822.parsedate_tz(dateString)
         if tm:
                 return time.gmtime(rfc822.mktime_tz(tm))
 registerDateHandler(_parse_date_perforce)
 
 def _parse_date(dateString):
     '''Parses a variety of date formats into a 9-tuple in GMT'''
     for handler in _date_handlers:
         try:
             date9tuple = handler(dateString)
             if not date9tuple: continue
             if len(date9tuple) != 9:
                 if _debug: sys.stderr.write('date handler function must return 9-tuple\n')
                 raise ValueError
             map(int, date9tuple)
             return date9tuple
         except Exception as e:
             if _debug: sys.stderr.write('%s raised %s\n' % (handler.__name__, repr(e)))
             pass
     return None
 
 def _getCharacterEncoding(http_headers, xml_data):
     '''Get the character encoding of the XML document
 
     http_headers is a dictionary
     xml_data is a raw string (not Unicode)
 
     This is so much trickier than it sounds, it's not even funny.
     According to RFC 3023 ('XML Media Types'), if the HTTP Content-Type
     is application/xml, application/*+xml,
     application/xml-external-parsed-entity, or application/xml-dtd,
     the encoding given in the charset parameter of the HTTP Content-Type
     takes precedence over the encoding given in the XML prefix within the
     document, and defaults to 'utf-8' if neither are specified.  But, if
     the HTTP Content-Type is text/xml, text/*+xml, or
     text/xml-external-parsed-entity, the encoding given in the XML prefix
     within the document is ALWAYS IGNORED and only the encoding given in
     the charset parameter of the HTTP Content-Type header should be
     respected, and it defaults to 'us-ascii' if not specified.
 
     Furthermore, discussion on the atom-syntax mailing list with the
     author of RFC 3023 leads me to the conclusion that any document
     served with a Content-Type of text/* and no charset parameter
     must be treated as us-ascii.  (We now do this.)  And also that it
     must always be flagged as non-well-formed.  (We now do this too.)
 
     If Content-Type is unspecified (input was local file or non-HTTP source)
     or unrecognized (server just got it totally wrong), then go by the
     encoding given in the XML prefix of the document and default to
     'iso-8859-1' as per the HTTP specification (RFC 2616).
 
     Then, assuming we didn't find a character encoding in the HTTP headers
     (and the HTTP Content-type allowed us to look in the body), we need
     to sniff the first few bytes of the XML data and try to determine
     whether the encoding is ASCII-compatible.  Section F of the XML
     specification shows the way here:
     http://www.w3.org/TR/REC-xml/#sec-guessing-no-ext-info
 
     If the sniffed encoding is not ASCII-compatible, we need to make it
     ASCII compatible so that we can sniff further into the XML declaration
     to find the encoding attribute, which will tell us the true encoding.
 
     Of course, none of this guarantees that we will be able to parse the
     feed in the declared character encoding (assuming it was declared
     correctly, which many are not).  CJKCodecs and iconv_codec help a lot;
     you should definitely install them if you can.
     http://cjkpython.i18n.org/
     '''
 
     def _parseHTTPContentType(content_type):
         '''takes HTTP Content-Type header and returns (content type, charset)
 
         If no charset is specified, returns (content type, '')
         If no content type is specified, returns ('', '')
         Both return parameters are guaranteed to be lowercase strings
         '''
         content_type = content_type or ''
         content_type, params = cgi.parse_header(content_type)
         return content_type, params.get('charset', '').replace("'", '')
 
     sniffed_xml_encoding = ''
     xml_encoding = ''
     true_encoding = ''
     http_content_type, http_encoding = _parseHTTPContentType(http_headers.get('content-type'))
     # Must sniff for non-ASCII-compatible character encodings before
     # searching for XML declaration.  This heuristic is defined in
     # section F of the XML specification:
     # http://www.w3.org/TR/REC-xml/#sec-guessing-no-ext-info
     try:
         if xml_data[:4] == '\x4c\x6f\xa7\x94':
             # EBCDIC
             xml_data = _ebcdic_to_ascii(xml_data)
         elif xml_data[:4] == '\x00\x3c\x00\x3f':
             # UTF-16BE
             sniffed_xml_encoding = 'utf-16be'
             xml_data = unicode(xml_data, 'utf-16be').encode('utf-8')
         elif (len(xml_data) >= 4) and (xml_data[:2] == '\xfe\xff') and (xml_data[2:4] != '\x00\x00'):
             # UTF-16BE with BOM
             sniffed_xml_encoding = 'utf-16be'
             xml_data = unicode(xml_data[2:], 'utf-16be').encode('utf-8')
         elif xml_data[:4] == '\x3c\x00\x3f\x00':
             # UTF-16LE
             sniffed_xml_encoding = 'utf-16le'
             xml_data = unicode(xml_data, 'utf-16le').encode('utf-8')
         elif (len(xml_data) >= 4) and (xml_data[:2] == '\xff\xfe') and (xml_data[2:4] != '\x00\x00'):
             # UTF-16LE with BOM
             sniffed_xml_encoding = 'utf-16le'
             xml_data = unicode(xml_data[2:], 'utf-16le').encode('utf-8')
         elif xml_data[:4] == '\x00\x00\x00\x3c':
             # UTF-32BE
             sniffed_xml_encoding = 'utf-32be'
             xml_data = unicode(xml_data, 'utf-32be').encode('utf-8')
         elif xml_data[:4] == '\x3c\x00\x00\x00':
             # UTF-32LE
             sniffed_xml_encoding = 'utf-32le'
             xml_data = unicode(xml_data, 'utf-32le').encode('utf-8')
         elif xml_data[:4] == '\x00\x00\xfe\xff':
             # UTF-32BE with BOM
             sniffed_xml_encoding = 'utf-32be'
             xml_data = unicode(xml_data[4:], 'utf-32be').encode('utf-8')
         elif xml_data[:4] == '\xff\xfe\x00\x00':
             # UTF-32LE with BOM
             sniffed_xml_encoding = 'utf-32le'
             xml_data = unicode(xml_data[4:], 'utf-32le').encode('utf-8')
         elif xml_data[:3] == '\xef\xbb\xbf':
             # UTF-8 with BOM
             sniffed_xml_encoding = 'utf-8'
             xml_data = unicode(xml_data[3:], 'utf-8').encode('utf-8')
         else:
             # ASCII-compatible
             pass
         xml_encoding_match = re.compile('^<\?.*encoding=[\'"](.*?)[\'"].*\?>').match(xml_data)
     except:
         xml_encoding_match = None
     if xml_encoding_match:
         xml_encoding = xml_encoding_match.groups()[0].lower()
         if sniffed_xml_encoding and (xml_encoding in ('iso-10646-ucs-2', 'ucs-2', 'csunicode', 'iso-10646-ucs-4', 'ucs-4', 'csucs4', 'utf-16', 'utf-32', 'utf_16', 'utf_32', 'utf16', 'u16')):
             xml_encoding = sniffed_xml_encoding
     acceptable_content_type = 0
     application_content_types = ('application/xml', 'application/xml-dtd', 'application/xml-external-parsed-entity')
     text_content_types = ('text/xml', 'text/xml-external-parsed-entity')
     if (http_content_type in application_content_types) or \
        (http_content_type.startswith('application/') and http_content_type.endswith('+xml')):
         acceptable_content_type = 1
         true_encoding = http_encoding or xml_encoding or 'utf-8'
     elif (http_content_type in text_content_types) or \
          (http_content_type.startswith('text/')) and http_content_type.endswith('+xml'):
         acceptable_content_type = 1
         true_encoding = http_encoding or 'us-ascii'
     elif http_content_type.startswith('text/'):
         true_encoding = http_encoding or 'us-ascii'
     elif http_headers and (not http_headers.has_key('content-type')):
         true_encoding = xml_encoding or 'iso-8859-1'
     else:
         true_encoding = xml_encoding or 'utf-8'
     # some feeds claim to be gb2312 but are actually gb18030.
     # apparently MSIE and Firefox both do the following switch:
     if true_encoding.lower() == 'gb2312':
         true_encoding = 'gb18030'
     return true_encoding, http_encoding, xml_encoding, sniffed_xml_encoding, acceptable_content_type
 
 def _toUTF8(data, encoding):
     '''Changes an XML data stream on the fly to specify a new encoding
 
     data is a raw sequence of bytes (not Unicode) that is presumed to be in %encoding already
     encoding is a string recognized by encodings.aliases
     '''
     if _debug: sys.stderr.write('entering _toUTF8, trying encoding %s\n' % encoding)
     # strip Byte Order Mark (if present)
     if (len(data) >= 4) and (data[:2] == '\xfe\xff') and (data[2:4] != '\x00\x00'):
         if _debug:
             sys.stderr.write('stripping BOM\n')
             if encoding != 'utf-16be':
                 sys.stderr.write('trying utf-16be instead\n')
         encoding = 'utf-16be'
         data = data[2:]
     elif (len(data) >= 4) and (data[:2] == '\xff\xfe') and (data[2:4] != '\x00\x00'):
         if _debug:
             sys.stderr.write('stripping BOM\n')
             if encoding != 'utf-16le':
                 sys.stderr.write('trying utf-16le instead\n')
         encoding = 'utf-16le'
         data = data[2:]
     elif data[:3] == '\xef\xbb\xbf':
         if _debug:
             sys.stderr.write('stripping BOM\n')
             if encoding != 'utf-8':
                 sys.stderr.write('trying utf-8 instead\n')
         encoding = 'utf-8'
         data = data[3:]
     elif data[:4] == '\x00\x00\xfe\xff':
         if _debug:
             sys.stderr.write('stripping BOM\n')
             if encoding != 'utf-32be':
                 sys.stderr.write('trying utf-32be instead\n')
         encoding = 'utf-32be'
         data = data[4:]
     elif data[:4] == '\xff\xfe\x00\x00':
         if _debug:
             sys.stderr.write('stripping BOM\n')
             if encoding != 'utf-32le':
                 sys.stderr.write('trying utf-32le instead\n')
         encoding = 'utf-32le'
         data = data[4:]
     newdata = unicode(data, encoding)
     if _debug: sys.stderr.write('successfully converted %s data to unicode\n' % encoding)
     declmatch = re.compile('^<\?xml[^>]*?>')
     newdecl = '''<?xml version='1.0' encoding='utf-8'?>'''
     if declmatch.search(newdata):
         newdata = declmatch.sub(newdecl, newdata)
     else:
         newdata = newdecl + u'\n' + newdata
     return newdata.encode('utf-8')
 
 def _stripDoctype(data):
     '''Strips DOCTYPE from XML document, returns (rss_version, stripped_data)
 
     rss_version may be 'rss091n' or None
     stripped_data is the same XML document, minus the DOCTYPE
     '''
     start = re.search('<\w',data)
     start = start and start.start() or -1
     head,data = data[:start+1], data[start+1:]
 
     entity_pattern = re.compile(r'^\s*<!ENTITY([^>]*?)>', re.MULTILINE)
     entity_results=entity_pattern.findall(head)
     head = entity_pattern.sub('', head)
     doctype_pattern = re.compile(r'^\s*<!DOCTYPE([^>]*?)>', re.MULTILINE)
     doctype_results = doctype_pattern.findall(head)
     doctype = doctype_results and doctype_results[0] or ''
     if doctype.lower().count('netscape'):
         version = 'rss091n'
     else:
         version = None
 
     # only allow in 'safe' inline entity definitions
     replacement=''
     if len(doctype_results)==1 and entity_results:
        safe_pattern=re.compile('\s+(\w+)\s+"(&#\w+;|[^&"]*)"')
        safe_entities=filter(lambda e: safe_pattern.match(e),entity_results)
        if safe_entities:
            replacement='<!DOCTYPE feed [\n  <!ENTITY %s>\n]>' % '>\n  <!ENTITY '.join(safe_entities)
     data = doctype_pattern.sub(replacement, head) + data
 
     return version, data, dict(replacement and safe_pattern.findall(replacement))
 
 def parse(url_file_stream_or_string, etag=None, modified=None, agent=None, referrer=None, handlers=[]):
     '''Parse a feed from a URL, file, stream, or string'''
     result = FeedParserDict()
     result['feed'] = FeedParserDict()
     result['entries'] = []
     if _XML_AVAILABLE:
         result['bozo'] = 0
     if type(handlers) == types.InstanceType:
         handlers = [handlers]
     try:
         f = _open_resource(url_file_stream_or_string, etag, modified, agent, referrer, handlers)
         data = f.read()
     except Exception as e:
         result['bozo'] = 1
         result['bozo_exception'] = e
         data = ''
         f = None
 
     # if feed is gzip-compressed, decompress it
     if f and data and hasattr(f, 'headers'):
         if gzip and f.headers.get('content-encoding', '') == 'gzip':
             try:
                 data = gzip.GzipFile(fileobj=_StringIO(data)).read()
             except Exception as e:
                 # Some feeds claim to be gzipped but they're not, so
                 # we get garbage.  Ideally, we should re-request the
                 # feed without the 'Accept-encoding: gzip' header,
                 # but we don't.
                 result['bozo'] = 1
                 result['bozo_exception'] = e
                 data = ''
         elif zlib and f.headers.get('content-encoding', '') == 'deflate':
             try:
                 data = zlib.decompress(data, -zlib.MAX_WBITS)
             except Exception as e:
                 result['bozo'] = 1
                 result['bozo_exception'] = e
                 data = ''
 
     # save HTTP headers
     if hasattr(f, 'info'):
         info = f.info()
         etag = info.getheader('ETag')
         if etag:
             result['etag'] = etag
         last_modified = info.getheader('Last-Modified')
         if last_modified:
             result['modified'] = _parse_date(last_modified)
     if hasattr(f, 'url'):
         result['href'] = f.url
         result['status'] = 200
     if hasattr(f, 'status'):
         result['status'] = f.status
     if hasattr(f, 'headers'):
         result['headers'] = f.headers.dict
     if hasattr(f, 'close'):
         f.close()
 
     # there are four encodings to keep track of:
     # - http_encoding is the encoding declared in the Content-Type HTTP header
     # - xml_encoding is the encoding declared in the <?xml declaration
     # - sniffed_encoding is the encoding sniffed from the first 4 bytes of the XML data
     # - result['encoding'] is the actual encoding, as per RFC 3023 and a variety of other conflicting specifications
     http_headers = result.get('headers', {})
     result['encoding'], http_encoding, xml_encoding, sniffed_xml_encoding, acceptable_content_type = \
         _getCharacterEncoding(http_headers, data)
     if http_headers and (not acceptable_content_type):
         if http_headers.has_key('content-type'):
             bozo_message = '%s is not an XML media type' % http_headers['content-type']
         else:
             bozo_message = 'no Content-type specified'
         result['bozo'] = 1
         result['bozo_exception'] = NonXMLContentType(bozo_message)
 
     result['version'], data, entities = _stripDoctype(data)
 
     baseuri = http_headers.get('content-location', result.get('href'))
     baselang = http_headers.get('content-language', None)
 
     # if server sent 304, we're done
     if result.get('status', 0) == 304:
         result['version'] = ''
         result['debug_message'] = 'The feed has not changed since you last checked, ' + \
             'so the server sent no data.  This is a feature, not a bug!'
         return result
 
     # if there was a problem downloading, we're done
     if not data:
         return result
 
     # determine character encoding
     use_strict_parser = 0
     known_encoding = 0
     tried_encodings = []
     # try: HTTP encoding, declared XML encoding, encoding sniffed from BOM
     for proposed_encoding in (result['encoding'], xml_encoding, sniffed_xml_encoding):
         if not proposed_encoding: continue
         if proposed_encoding in tried_encodings: continue
         tried_encodings.append(proposed_encoding)
         try:
             data = _toUTF8(data, proposed_encoding)
             known_encoding = use_strict_parser = 1
             break
         except:
             pass
     # if no luck and we have auto-detection library, try that
     if (not known_encoding) and chardet:
         try:
             proposed_encoding = chardet.detect(data)['encoding']
             if proposed_encoding and (proposed_encoding not in tried_encodings):
                 tried_encodings.append(proposed_encoding)
                 data = _toUTF8(data, proposed_encoding)
                 known_encoding = use_strict_parser = 1
         except:
             pass
     # if still no luck and we haven't tried utf-8 yet, try that
     if (not known_encoding) and ('utf-8' not in tried_encodings):
         try:
             proposed_encoding = 'utf-8'
             tried_encodings.append(proposed_encoding)
             data = _toUTF8(data, proposed_encoding)
             known_encoding = use_strict_parser = 1
         except:
             pass
     # if still no luck and we haven't tried windows-1252 yet, try that
     if (not known_encoding) and ('windows-1252' not in tried_encodings):
         try:
             proposed_encoding = 'windows-1252'
             tried_encodings.append(proposed_encoding)
             data = _toUTF8(data, proposed_encoding)
             known_encoding = use_strict_parser = 1
         except:
             pass
     # if still no luck and we haven't tried iso-8859-2 yet, try that.
     if (not known_encoding) and ('iso-8859-2' not in tried_encodings):
         try:
             proposed_encoding = 'iso-8859-2'
             tried_encodings.append(proposed_encoding)
             data = _toUTF8(data, proposed_encoding)
             known_encoding = use_strict_parser = 1
         except:
             pass
     # if still no luck, give up
     if not known_encoding:
         result['bozo'] = 1
         result['bozo_exception'] = CharacterEncodingUnknown( \
             'document encoding unknown, I tried ' + \
             '%s, %s, utf-8, windows-1252, and iso-8859-2 but nothing worked' % \
             (result['encoding'], xml_encoding))
         result['encoding'] = ''
     elif proposed_encoding != result['encoding']:
         result['bozo'] = 1
         result['bozo_exception'] = CharacterEncodingOverride( \
             'documented declared as %s, but parsed as %s' % \
             (result['encoding'], proposed_encoding))
         result['encoding'] = proposed_encoding
 
     if not _XML_AVAILABLE:
         use_strict_parser = 0
     if use_strict_parser:
         # initialize the SAX parser
         feedparser = _StrictFeedParser(baseuri, baselang, 'utf-8')
         saxparser = xml.sax.make_parser(PREFERRED_XML_PARSERS)
         saxparser.setFeature(xml.sax.handler.feature_namespaces, 1)
         saxparser.setContentHandler(feedparser)
         saxparser.setErrorHandler(feedparser)
         source = xml.sax.xmlreader.InputSource()
         source.setByteStream(_StringIO(data))
         if hasattr(saxparser, '_ns_stack'):
             # work around bug in built-in SAX parser (doesn't recognize xml: namespace)
             # PyXML doesn't have this problem, and it doesn't have _ns_stack either
             saxparser._ns_stack.append({'http://www.w3.org/XML/1998/namespace':'xml'})
         try:
             saxparser.parse(source)
         except Exception, e:
             if _debug:
                 import traceback
                 traceback.print_stack()
                 traceback.print_exc()
                 sys.stderr.write('xml parsing failed\n')
             result['bozo'] = 1
             result['bozo_exception'] = feedparser.exc or e
             use_strict_parser = 0
     if not use_strict_parser:
         feedparser = _LooseFeedParser(baseuri, baselang, known_encoding and 'utf-8' or '', entities)
         feedparser.feed(data)
     result['feed'] = feedparser.feeddata
     result['entries'] = feedparser.entries
     result['version'] = result['version'] or feedparser.version
     result['namespaces'] = feedparser.namespacesInUse
     return result
 
 class Serializer:
     def __init__(self, results):
         self.results = results
 
 class TextSerializer(Serializer):
     def write(self, stream=sys.stdout):
         self._writer(stream, self.results, '')
 
     def _writer(self, stream, node, prefix):
         if not node: return
         if hasattr(node, 'keys'):
             keys = node.keys()
             keys.sort()
             for k in keys:
                 if k in ('description', 'link'): continue
                 if node.has_key(k + '_detail'): continue
                 if node.has_key(k + '_parsed'): continue
                 self._writer(stream, node[k], prefix + k + '.')
         elif type(node) == types.ListType:
             index = 0
             for n in node:
                 self._writer(stream, n, prefix[:-1] + '[' + str(index) + '].')
                 index += 1
         else:
             try:
                 s = str(node).encode('utf-8')
                 s = s.replace('\\', '\\\\')
                 s = s.replace('\r', '')
                 s = s.replace('\n', r'\n')
                 stream.write(prefix[:-1])
                 stream.write('=')
                 stream.write(s)
                 stream.write('\n')
             except:
                 pass
 
 class PprintSerializer(Serializer):
     def write(self, stream=sys.stdout):
         if self.results.has_key('href'):
             stream.write(self.results['href'] + '\n\n')
         from pprint import pprint
         pprint(self.results, stream)
         stream.write('\n')
 
 if __name__ == '__main__':
     try:
         from optparse import OptionParser
     except:
         OptionParser = None
 
     if OptionParser:
         optionParser = OptionParser(version=__version__, usage="%prog [options] url_or_filename_or_-")
         optionParser.set_defaults(format="pprint")
         optionParser.add_option("-A", "--user-agent", dest="agent", metavar="AGENT", help="User-Agent for HTTP URLs")
         optionParser.add_option("-e", "--referer", "--referrer", dest="referrer", metavar="URL", help="Referrer for HTTP URLs")
         optionParser.add_option("-t", "--etag", dest="etag", metavar="TAG", help="ETag/If-None-Match for HTTP URLs")
         optionParser.add_option("-m", "--last-modified", dest="modified", metavar="DATE", help="Last-modified/If-Modified-Since for HTTP URLs (any supported date format)")
         optionParser.add_option("-f", "--format", dest="format", metavar="FORMAT", help="output results in FORMAT (text, pprint)")
         optionParser.add_option("-v", "--verbose", action="store_true", dest="verbose", default=False, help="write debugging information to stderr")
         (options, urls) = optionParser.parse_args()
         if options.verbose:
             _debug = 1
         if not urls:
             optionParser.print_help()
             sys.exit(0)
     else:
         if not sys.argv[1:]:
             print __doc__
             sys.exit(0)
         class _Options:
             etag = modified = agent = referrer = None
             format = 'pprint'
         options = _Options()
         urls = sys.argv[1:]
 
     zopeCompatibilityHack()
 
     serializer = globals().get(options.format.capitalize() + 'Serializer', Serializer)
     for url in urls:
         results = parse(url, etag=options.etag, modified=options.modified, agent=options.agent, referrer=options.referrer)
         serializer(results).write(sys.stdout)