csrf.py 文件源码

def error_handler(self, view):
        """Register a function that will generate the response for CSRF errors.

        .. deprecated:: 0.14
            Use the standard Flask error system with
            ``@app.errorhandler(CSRFError)`` instead. This will be removed in
            version 1.0.

        The function will be passed one argument, ``reason``. By default it will
        raise a :class:`~flask_wtf.csrf.CSRFError`. ::

            @csrf.error_handler
            def csrf_error(reason):
                return render_template('error.html', reason=reason)

        Due to historical reasons, the function may either return a response
        or raise an exception with :func:`flask.abort`.
        """

        warnings.warn(FlaskWTFDeprecationWarning(
            '"@csrf.error_handler" is deprecated. Use the standard Flask error '
            'system with "@app.errorhandler(CSRFError)" instead. This will be'
            'removed in 1.0.'
        ), stacklevel=2)

        @wraps(view)
        def handler(reason):
            response = current_app.make_response(view(reason))
            raise CSRFError(response.get_data(as_text=True), response=response)

        self._error_response = handler
        return view