在请求中标题{"Accept":"application/octet-stream"}时返回JSON错误

Question

从其他WebService返回一些错误时我遇到了一些问题.

使用标头发出请求{"Accept":"application/octet-stream"} (ResponseEntity<InputStreamResource>如果所有进程都顺利,则服务返回文档).

当所有过程顺利进行时,文档下载得很好,但是当发生错误并且代码跳转到@ControllerAdvice并尝试返回JSON错误时.当试图返回JSON弹簧崩溃时出现问题:

org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation 

以下是一些代码的示例:

调节器

@RequestMapping(value = "/test", method = RequestMethod.GET, produces = {MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_OCTET_STREAM_VALUE })
    public ResponseEntity<CustomError> test() throws Exception {
        throw new Exception();
    }

ControllerAdvice

@ControllerAdvice
public class ExceptionHandlerAdvice {
    private static final Logger logger = LogManager.getLogger(ExceptionHandlerAdvice.class);

    @ExceptionHandler({Exception.class,Throwable.class})
    @ResponseBody
    public ResponseEntity<CustomError> handleUnhandledException(Exception exception) {
        CustomError error = new CustomError(exception.getMessage());
        return new ResponseEntity<CustomError>(error, HttpStatus.INTERNAL_SERVER_ERROR);
    }

}

CustomError:

public class CustomError {

    private String errorDescription;

    public CustomError(String errorDescription) {
        super();
        this.errorDescription = errorDescription;
    }

    public String getErrorDescription() {
        return errorDescription;
    }

    public void setErrorDescription(String errorDescription) {
        this.errorDescription = errorDescription;
    }

}

我也试过在@controllerAdvice上返回新的标题

@ExceptionHandler({Exception.class,Throwable.class})
  @ResponseBody
  public ResponseEntity<CustomError> handleUnhandledException(Exception exception) {
    HttpHeaders headers = new HttpHeaders();
    headers.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));
    CustomError error = new CustomError(exception.getMessage());
    return new ResponseEntity<CustomError>(error,headers, HttpStatus.INTERNAL_SERVER_ERROR);
  }

任何想法如何使这项工作或忽略响应头上的接头？这是可能的？

提前致谢

Answer 1

此异常意味着您的响应类型与请求标头不匹配。如果您期望返回 JSON/Stream，则您的请求标头应该是{"Accept":"application/octet-stream,application/json"}.