弹簧架处理空请求正文（400 错误请求）

rest java spring spring-boot spring-4

2022-09-03 09:22:53

我正在使用Spring4开发一个RESTful应用程序。我想处理POST请求不包含正文的情况。我编写了以下自定义异常处理程序：

    @ControllerAdvice
    public class MyRestExceptionHandler {
     
      @ExceptionHandler
      @ResponseStatus(HttpStatus.BAD_REQUEST)
      public ResponseEntity<MyErrorResponse> handleJsonMappingException(JsonMappingException ex) {
          MyErrorResponse errorResponse = new MyErrorResponse("request has empty body");
          return new ResponseEntity<MyErrorResponse>(errorResponse, HttpStatus.BAD_REQUEST);
      }   
      @ExceptionHandler(Throwable.class)
      public ResponseEntity<MyErrorResponse> handleDefaultException(Throwable ex) {
        MyErrorResponse errorResponse = new MyErrorResponse(ex);
        return new ResponseEntity<MyErrorResponse>(errorResponse, HttpStatus.BAD_REQUEST);
      }
    }
    
     @RestController
     public class ContactRestController{
        @RequestMapping(path="/contact", method=RequestMethod.POST)
        public void save(@RequestBody ContactDTO contactDto) {...}
     }

当它收到没有正文的 POST 时，不会调用这些方法。相反，客户端会收到一个具有 400 BAD REQUEST HTTP 状态和空正文的响应。有人知道如何处理它吗？

答案 1

我解决了这个问题（自定义异常处理程序必须扩展）。我的解决方案如下：ResponseEntityExceptionHandler

        @ControllerAdvice
        public class RestExceptionHandler extends ResponseEntityExceptionHandler {
    
            @Override
            protected ResponseEntity<Object> handleHttpMessageNotReadable(
                HttpMessageNotReadableException ex, HttpHeaders headers,
                HttpStatus status, WebRequest request) {
                // paste custom hadling here
            }
        }

答案 2

在我的情况下，我需要处理所有具有无效参数的请求。因此，我扩展了我的类并重写了该方法。您可以在类中找到自己的处理程序ResponseEntityExceptionHandlerhandleMissingServletRequestParameterResponseEntityExceptionHandler

@ControllerAdvice 
public class YourExceptionHandler extends ResponseEntityExceptionHandler {

    @ExceptionHandler(Exception.class)
    public final ResponseEntity handleAllExceptions(Exception ex) {
        // Log and return
    }

    @Override
    public ResponseEntity<Object> handleMissingServletRequestParameter(MissingServletRequestParameterException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
        // Do your code here
        return new ResponseEntity<>("YOUR REQUEST PARAMS NOT MATCH!");
    } 
}

弹簧架 处理空请求正文（400 错误请求）

弹簧架处理空请求正文（400 错误请求）