我要实现的目标是使用404代码获取响应错误,并使用WebClient获取错误正文,我该如何正确执行此操作?
这是我的错误代码为404的响应,以及来自其他API的正文响应:
{
"timestamp": "2020-09-02T07:36:01.960+00:00",
"message": "Data not found!",
"details": "uri=/api/partnershipment/view"
}
这是我的消耗代码:
Map<String,Long> req = new HashMap<String,Long>();
req.put("id", 2L);
PartnerShipmentDto test = webClient.post()
.uri(urlTest).body(Mono.just(req), PartnerShipmentDto.class)
.exchange()
.flatMap(res -> {
if(res.statusCode().isError()){
res.body((clientHttpResponse, context) -> {
throw new ResourceNotFound(clientHttpResponse.getBody().toString());
});
throw new ResourceNotFound("aaaa");
} else {
return res.bodyToMono(PartnerShipmentDto.class);
}
})
.block();
这是我的ResourNotFound.java类:
@SuppressWarnings("serial")
@ResponseStatus(HttpStatus.NOT_FOUND)
public class ResourceNotFound extends RuntimeException {
public ResourceNotFound(String message){
super(message);
}
}
这是使用@ControllerAdvice的全局异常处理程序:
@ControllerAdvice
@RestController
public class CustomResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
public final ResponseEntity<Object> handleAllException(Exception ex, WebRequest request) {
ExceptionResponse exceptionResponse = new ExceptionResponse(new Date(), ex.getMessage(), request.getDescription(false));
logger.error(ex.getMessage());
return new ResponseEntity(exceptionResponse, HttpStatus.INTERNAL_SERVER_ERROR);
}
@ExceptionHandler(ResourceNotFound.class)
public final ResponseEntity<Object> handleResourceNotFoundException(ResourceNotFound ex, WebRequest request) {
ExceptionResponse exceptionResponse = new ExceptionResponse(new Date(), ex.getMessage(), request.getDescription(false));
logger.error(ex.getMessage());
return new ResponseEntity(exceptionResponse, HttpStatus.NOT_FOUND);
}
}
但是我在ResourceNotFound异常中打印的响应是这样的(这是我从消费者方面的错误):
{
"timestamp": "2020-09-02T07:50:48.132+00:00",
"message": "FluxMap",
"details": "uri=/api/shipmentaddressgrouping/store"
}
它只写了“ FluxMap”,我如何获得“消息”字段?我也想获取“时间戳”和“详细信息”字段
答案 0 :(得分:1)
您提供的示例代码的主要问题是以下代码行
throw new ResourceNotFound(clientHttpResponse.getBody().toString());
此类型为Flux<DataBuffer>
,而不是实际的响应主体。这会导致您遇到的问题。
解决此问题的方法是在错误响应正文上调用bodyToMono
方法并映射到Java对象。这可以通过从Web客户端公开的onStatus
操作符来完成,该操作符使您可以对特定的状态码执行特定的操作。
下面的代码段应解决此问题
webClient.post()
.uri(uriTest).body(Mono.just(req), PartnerShipmentDto.class)
.retrieve()
.onStatus(HttpStatus::isError, res -> res.bodyToMono(ErrorBody.class)
.onErrorResume(e -> Mono.error(new ResourceNotFound("aaaa")))
.flatMap(errorBody -> Mono.error(new ResourceNotFound(errorBody.getMessage())))
)
.bodyToMono(PartnerShipmentDto.class)
.block();
类ErrorBody
应该包含要从json映射到java对象的所有字段。下面的示例仅映射“消息”字段。
public class ErrorBody {
private String message;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}