def response_json(self, status, response, content_type='application/json', encoding='utf-8', headers=None, jsonp=None):
        """
        Send a JSON response
        """

        encoder = JSONEncoder(
            check_circular=self.app.validate_output,
            allow_nan=False,
            sort_keys=True,
            indent=2 if self.app.pretty_output else None,
            separators=(',', ': ') if self.app.pretty_output else (',', ':')
        )
        content = encoder.encode(response)
        if jsonp:
            content_list = [jsonp.encode(encoding), b'(', content.encode(encoding), b');']
        else:
            content_list = [content.encode(encoding)]
        return self.response(status, content_type, content_list, headers=headers)
Send a JSON response