[英]How to extract response header & status code from Spring 5 WebClient ClientResponse
I am new to Spring Reactive framework & trying to convert Springboot 1.5.x code into Springboot 2.0.我是 Spring Reactive 框架的新手,正在尝试将 Springboot 1.5.x 代码转换为 Springboot 2.0。 I need to return response header after some filtering, body & status code from Spring 5 WebClient ClientResponse.
经过一些过滤后,我需要返回响应 header,来自 Spring 的正文和状态代码 5 WebClient ClientResponse。 I do not want to use block() method as it will convert it into sync call.
我不想使用 block() 方法,因为它会将其转换为同步调用。 I am able to get responsebody pretty easily using bodyToMono.
我可以使用 bodyToMono 轻松获得 responsebody。 Also, I am getting status code, headers & body if I am just returning ClientResponse but I need to process response based on statusCode & header parameters.
此外,如果我只是返回 ClientResponse,我将获得状态代码、标头和正文,但我需要根据 statusCode 和 header 参数处理响应。 I tried subscribe, flatMap etc. but nothing works.
我试过订阅、平面地图等,但没有任何效果。
Eg - Below code will return response Body例如 - 下面的代码将返回响应正文
Mono<String> responseBody = response.flatMap(resp -> resp.bodyToMono(String.class));
But similar paradigm is not working to get statusCode & Response headers.但是类似的范例无法获取 statusCode 和 Response 标头。 Can someone help me in extracting statusCode & header parameters using Spring 5 reactive framework.
有人可以帮助我使用 Spring 5 反应框架提取 statusCode 和 header 参数。
You can use the exchange function of webclient eg您可以使用 webclient 的交换功能,例如
Mono<String> reponse = webclient.get()
.uri("https://stackoverflow.com")
.exchange()
.doOnSuccess(clientResponse -> System.out.println("clientResponse.headers() = " + clientResponse.headers()))
.doOnSuccess(clientResponse -> System.out.println("clientResponse.statusCode() = " + clientResponse.statusCode()))
.flatMap(clientResponse -> clientResponse.bodyToMono(String.class));
then you can convert bodyToMono etc然后你可以转换 bodyToMono 等
I needed to check the response details(headers, status, etc) and body as well.我还需要检查响应详细信息(标题、状态等)和正文。
The only way I was able to do it was by using .exchange()
with two subscribe()
as the following example:我能够做到的唯一方法是使用
.exchange()
和两个subscribe()
作为以下示例:
Mono<ClientResponse> clientResponse = WebClient.builder().build()
.get().uri("https://stackoverflow.com")
.exchange();
clientResponse.subscribe((response) -> {
// here you can access headers and status code
Headers headers = response.headers();
HttpStatus stausCode = response.statusCode();
Mono<String> bodyToMono = response.bodyToMono(String.class);
// the second subscribe to access the body
bodyToMono.subscribe((body) -> {
// here you can access the body
System.out.println("body:" + body);
// and you can also access headers and status code if you need
System.out.println("headers:" + headers.asHttpHeaders());
System.out.println("stausCode:" + stausCode);
}, (ex) -> {
// handle error
});
}, (ex) -> {
// handle network error
});
I hope it helps.我希望它有帮助。 If someone knows a better way to do it, please let us know.
如果有人知道更好的方法,请告诉我们。
For status code you can try this:对于状态代码,您可以尝试以下操作:
Mono<HttpStatus> status = webClient.get()
.uri("/example")
.exchange()
.map(response -> response.statusCode());
For headers:对于标题:
Mono<HttpHeaders> result = webClient.get()
.uri("/example")
.exchange()
.map(response -> response.headers().asHttpHeaders());
After Spring Boot 2.4.x / Spring 5.3, WebClient exchange
method is deprecated in favor of retrieve
, so you have to get the headers and response status using ResponseEntity like the following example:在 Spring Boot 2.4.x / Spring 5.3 之后,WebClient
exchange
方法被弃用,取而代之的是retrieve
,因此您必须使用 ResponseEntity 获取标头和响应状态,如下例所示:
webClient
.method(HttpMethod.POST)
.uri(uriBuilder -> uriBuilder.path(loginUrl).build())
.bodyValue(new LoginBO(user, passwd))
.retrieve()
.toEntity(LoginResponse.class)
.filter(
entity ->
entity.getStatusCode().is2xxSuccessful()
&& entity.getBody() != null
&& entity.getBody().isLogin())
.flatMap(entity -> Mono.justOrEmpty(entity.getHeaders().getFirst(tokenHeader)));
You can configure spring boot >= 2.1.0 to log request and response if you are using the WebClient
:如果您使用
WebClient
您可以配置 spring boot >= 2.1.0 来记录请求和响应:
spring.http.log-request-details: true
logging.level.org.springframework.web.reactive.function.client.ExchangeFunctions: TRACE
As desribed in the sprint boot docs , if you want headers to be logged, too, you have to add正如sprint boot docs 中所描述的,如果您也希望记录标题,则必须添加
Consumer<ClientCodecConfigurer> consumer = configurer ->
configurer.defaultCodecs().enableLoggingRequestDetails(true);
WebClient webClient = WebClient.builder()
.exchangeStrategies(ExchangeStrategies.builder().codecs(consumer).build())
.build();
But be aware that this can log sensitve information.但请注意,这可能会记录敏感信息。
httpClient
.get()
.uri(url)
.retrieve()
.toBodilessEntity()
.map(reponse -> Tuple2(reponse.statusCode, reponse.headers))
As discussed above, the exchange has been deprecated so we are using retrieve().如上所述,交换已被弃用,因此我们使用了retrieve()。 This is how I'm returning the code after making a request.
这就是我在提出请求后返回代码的方式。
public HttpStatus getResult() {
WebClient.ResponseSpec response = client
.get()
.uri("/hello")
.accept(MediaType.APPLICATION_JSON)
.retrieve();
return Optional.of(response.toBodilessEntity().block().getStatusCode()).get();
}
You can use flatMap
to extract the object from Mono
您可以使用
flatMap
从 Mono 中提取Mono
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