feedparser.py 文件源码

def lookslikehtml(self, s):
        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+)>',s) or re.search("&#?\w+;",s)): 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+)',s)): 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+);',s)): return

        return 1