web.py 文件源码

def method_rewrite_middleware(app, input_name='__METHOD_OVERRIDE__'):
    allowed_methods = frozenset(('GET', 'POST', 'PUT', 'DELETE'))

    def _middleware(environ, start_response):
        query_string = environ.get('QUERY_STRING', '')

        if input_name in query_string:
            args = url_decode(query_string)
            method = args.get(input_name)

            if method in allowed_methods:
                environ['REQUEST_METHOD'] = method

        return app(environ, start_response)

    return _middleware