def findHTMLMeta(stream):
"""Look for a meta http-equiv tag with the YADIS header name.
@param stream: Source of the html text
@type stream: Object that implements a read() method that works
like file.read
@return: The URI from which to fetch the XRDS document
@rtype: str
@raises MetaNotFound: raised with the content that was
searched as the first parameter.
"""
parser = YadisHTMLParser()
chunks = []
while 1:
chunk = stream.read(CHUNK_SIZE)
if not chunk:
# End of file
break
chunks.append(chunk)
try:
parser.feed(chunk)
except HTMLParser.error() as why:
# HTML parse error, so bail
chunks.append(stream.read())
break
except ParseDone as why:
uri = why[0]
if uri is None:
# Parse finished, but we may need the rest of the file
chunks.append(stream.read())
break
else:
return uri
content = ''.join(chunks)
raise MetaNotFound(content)
def error(self, message):
HTMLParser.error(message)
