[Spring Cloud Gateway MVC] Multipart data missing

[lukaszpy]

Describe the bug After routing multipart/form-data through gateway mvc, downstream service receive request but without multipart file.

I looked into code of gateway and in RestClientProxyExchange we have

@Override
    public ServerResponse exchange(Request request) {
        return restClient.method(request.getMethod()).uri(request.getUri())
                .headers(httpHeaders -> httpHeaders.putAll(request.getHeaders()))
                .body(outputStream -> copyBody(request, outputStream))
                .exchange((clientRequest, clientResponse) -> doExchange(request, clientResponse), false);
    }

there is not copy multipart data from original request.

Example route:

@Bean
    fun dataStorageFileUpload(): RouterFunction<ServerResponse> {
        val servicesUrl = services.url!!
        Objects.requireNonNull(servicesUrl["dataStorageService"], "Data storage service url is empty")
        return GatewayRouterFunctions.route("dataStorageFileUpload")
            .PUT("/storage/file/**", http(servicesUrl["dataStorageService"]))
            .before(BeforeFilterFunctions.stripPrefix(1))
            .filter(HandlerFilterFunction.ofRequestProcessor(authenticationPopular))
            .after(AfterFilterFunctions.removeResponseHeader(GROUP_HEADER))
            .after(AfterFilterFunctions.removeResponseHeader(HttpHeaders.AUTHORIZATION))
            .after(AfterFilterFunctions.removeResponseHeader(TOKEN_HEADER))
            .build()
    }

[dgradecak]

@lukaszpy do you have spring security configured? I had the smae behavior when using spring security, did not dig deeper to understand the cause. For now by removing spring security the body is processed correctly, specially when using spring-cloud-gateway-server-mvc

[lukaszpy]

@dgradecak yes I have spring sec, as validate tokens, and checking roles for path