errorhandler.py 文件源码

def _handle_error(self, e):
        """Returns handled excpetion. Detects blueprint from global
        :class:`~flask.wrappers.Request` object, and passes exception object to
        its `registered_errorhandler`.
        """
        blueprint = self._detect_blueprint()

        if isinstance(e, HTTPException):
            if self._error_loader_callback is not None:
                e = self._error_loader_callback(e)  # load custom exception
        else:
            print(traceback.format_exc())
            e = HTTPException()

        if blueprint is not None:
            if blueprint.name in self._errorhandlers:
                return self._errorhandlers[blueprint.name](e)
        else:
            if None in self._errorhandlers:
                return self._errorhandlers[None](e)
        return e