image/svg+xml some text some text uri_too_long malformed_request some text init is_authorized forbidden rate_limited valid_content_headers ... service_available known_methods allowed_methods true known* false allowed* false true false false true false unknown* true unallowed* true false* true true* false 503 service unavailable 501 not implemented 414 request URI too long 405 method not allowed 400 bad request 401 unauthorized 403 forbidden 429 too many requests 501 not implemented middlewares valid_entity_length ... true true false 413 request entity too large