base_handler.py 文件源码

def cursor(self):
        cursor = self.get_argument('cursor', None)
        if cursor:
            try:
                cursor = int(cursor)
            except ValueError:
                self.redirect(self.request.path, permanent=True)
                raise Finish()
            if cursor < 0:
                raise HTTPError(404)
        else:
            cursor = None
        return cursor