gistfile1.py

    def validate_python(self, value, state):
        import logging
        log = logging.getLogger(__name__)
        log.info('URIValidator: %r' % value)
        try:
            splitted_url = urlsplit(value)
        except:
            self.raise_error_bad_url(value, state)
        scheme = splitted_url[0] # '.scheme' in Python 2.5+
        netloc = splitted_url[1] # '.netloc' in Python 2.5+
        path = splitted_url[2] # '.path' in Python 2.5+
        log.info('scheme: %r - netloc: %r - path: %r' % (scheme, netloc, path))
        # Python 2.4 does not fill netloc when parsing urls with unknown
        # schemes (e.g. 'rtmp://')
        netloc_given = (len(netloc) > 0) or (path.startswith('//') and path != '//')
        log.info('netloc_given? %r' % netloc_given)
        if (scheme == '') or not netloc_given:
            self.raise_error_bad_url(value, state)