cachedRequestBodyObject 在 Spring Cloud Gateway 自定义过滤器工厂中不起作用

Question

I am using spring cloud gateway for my project. I have written one custom filter factory for generating HMAC Signature which requires request payload. I have enabled readBody(String.class, requestBody -> true) to true in route definition and from cachedRequestBody attribute, I was able to get the request payload in my custom filter with following spring boot version 2.1.3.RELEASE and spring cloud version 2.1.1.RELEASE .

Now after upgrading the spring boot version to 2.3.3.RELEASE and Spring cloud version 2.2.4.RELEASE same code is not working.

does the readbody predicate not work with latest spring cloud version? any suggestion will be helpful.

Sample of custom filter factory:

@Override
public GatewayFilter apply(Config config) {
  
    return (exchange, chain) -> {
        HttpMethod method = exchange.getRequest().getMethod();
        String httpVerb = method.name();
        ServerHttpRequest httpRequest = exchange.getRequest();
        String requestPayload = exchange.getAttribute("cachedRequestBodyObject");
       signature = generateSignature(....);
       ServerHttpRequest.Builder builder = httpRequest.mutate().header(HttpHeaders.AUTHORIZATION, signature)
       ServerHttpRequest downStreamRequest= (config.getPath()!=null?builder.path(config.path):builder).build();
        return chain.filter(exchange.mutate().request(downStreamRequest).build());
    };
}

Answer 1

我尝试使用 spring cloud 2020.0.0 和 spring boot 2.4.1 ，我能够在我的自定义过滤器中获取请求负载