Spring Boot Rest Controller:返回默认错误 JSON

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【中文标题】Spring Boot Rest Controller:返回默认错误 JSON【英文标题】:Spring Boot Rest Controller: Return default Error JSON 【发布时间】:2019-09-26 03:36:34 【问题描述】:

在我的 API 中,我喜欢保护用户详细信息端点,以便正常登录的用户只能访问他们的用户资料。因此我正在编写控制器:

@RequestMapping(value = URL_USER + "/id", method = RequestMethod.GET)
@ResponseBody
public PersistentEntityResource get(PersistentEntityResourceAssembler persistentEntityResourceAssembler, @PathVariable Long id) 
    Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

    ApplicationUser loggedInUser = applicationUserService.findByUsername(authentication.getName());
    ApplicationUser applicationUser = applicationUserService.findById(id);

    if (applicationUser.getId().equals(loggedInUser.getId())) 
        return persistentEntityResourceAssembler.toFullResource(applicationUser);
    

    throw new IllegalAccessException();
 

与其引发导致InternalServerExcetption 的异常,我更喜欢返回默认的spring boot 错误json,如下所示:


    "timestamp": "2019-05-08T11:42:23.064+0000",
    "status": 403,
    "error": "Forbidden",
    "message": "Access Denied",
    "path": "/user/2"

我希望有一个解决方案,它也适用于 404 等其他错误。实现该目标的最简单方法是什么?

【问题讨论】:

您可以使用@ControllerAdvice@ExceptionHandler 来实现这一点,就像我在this question 中提到的那样 这行不通,因为我喜欢继续返回 PersistentEntityResource 而不是 ResponseEntity 这样的换行有什么问题吗? ResponseEntity<PersistentEntityResource> 还没试过,不过找到了一个解决方案,貌似最优雅 【参考方案1】:

你也可以使用下面的方法

public class FooController

    //...
    @ExceptionHandler( CustomException1.class, CustomException2.class )
    public String handleException() 
        return "the intended body";
    

或者,您可以使用@ControllerAdvice将此逻辑作为全局异常处理程序放入

@ControllerAdvice
public class RestResponseEntityExceptionHandler
        extends ResponseEntityExceptionHandler 

    @ExceptionHandler(value
            =  IllegalArgumentException.class, IllegalStateException.class )
    protected ResponseEntity<Object> handleConflict(
            RuntimeException ex, WebRequest request) 
        String bodyOfResponse = "This should be application specific";
        return handleExceptionInternal(ex, bodyOfResponse,
                new HttpHeaders(), HttpStatus.CONFLICT, request);
    

【讨论】:

【参考方案2】:

经过一番研究,我找到了一个看起来相当优雅的解决方案:

RestController 方法长这样:

@RequestMapping(value = URL_USER + "/id", method = RequestMethod.GET)
@ResponseBody
public PersistentEntityResource get(PersistentEntityResourceAssembler persistentEntityResourceAssembler, @PathVariable Long id) 
    Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

    ApplicationUser loggedInUser = applicationUserService.findByUsername(authentication.getName());
    ApplicationUser applicationUser = applicationUserService.findById(id);

    if (applicationUser.getId().equals(loggedInUser.getId())) 
        return persistentEntityResourceAssembler.toFullResource(applicationUser);
    

    throw new ForbiddenRequestException("Access not allowed");

另外我已经实现了ForbiddenRequestException类:

@ResponseStatus(value = HttpStatus.FORBIDDEN)
public class ForbiddenRequestException extends RuntimeException 
    public ForbiddenRequestException(String message) 
        super(message);
    

至少要通过在属性中设置 server.error.include-stacktrace=never 从 JSON 中删除 trace,这可能并不理想,但我认为在生产中你应该这样做。

【讨论】:

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