Java Spring Boot框架- WebClient日志记录4xx/5xx主体响应

Question

我刚接触Spring Boot框架的WebClient。如何仅在出错时记录4xx/5xx及其错误主体，但如果成功，则将clientResponse作为String返回，稍后我们可以使用gson对其进行序列化？

String postResponse =
        post(
            ENDPOINT,
            token,
            request,
            Request.class);

Response response = gson.fromJson(postResponse, Response.class);

    private String post(String endpoint, String token, Mono<?> requestBody, Class<?> requestBodyClass) {

      WebClient.Builder webClientBuilder = WebClient.builder();

      WebClient.RequestBodySpec requestBodySpec = webClientBuilder.build().post().uri(uri);
      requestBodySpec.header(
          "Authorization", BEARER_TOKEN_PREFIX + this.accessTokens.get(token));

      return requestBodySpec
        .header("Content-Type", HEADER_VALUE_CONTENT_TYPE)
        .body(Mono.just(requestBody), requestBodyClass)
        .retrieve()
        .bodyToMono(String.class)
        .block();
    }

Answer 1

我可以这样建议：

    private String post(String endpoint, String token, Mono<?> requestBody, Class<?> requestBodyClass) {
        Mono<String> stringMono = WebClient.builder().build()
                .post()
                .uri(endpoint)
                .body(BodyInserters.fromValue(requestBodyClass))
                .exchange()
                .flatMap(SomeServiceImpl::getResultAsStringOrLog4xx5xx);
        
        //get the JSON from the Mono, but you might not want to block
    }

(我省略了标题)

问题的实际答案是，使用类似的方法执行日志记录：

private static Mono<String> getResultAsStringOrLog4xx5xx(ClientResponse response) {
        if (response.statusCode().is2xxSuccessful()) {
            return response.bodyToMono(String.class);
        } else if (response.statusCode().is5xxServerError()) {
            Logger.error(); //up to you
        } else {
//at this point, you can have your logic on error code
        }
        return
    }

还有其他方法可以做到这一点，希望这能帮助你入门。

另外，尽量不要在应用程序中阻塞()。

谢谢