Spring Exception Handler 返回部分响应 - 也许是错误？

Posted 2023-02-26

【中文标题】Spring Exception Handler 返回部分响应 - 也许是错误？

【英文标题】：Spring Exception Handler returns partial response - maybe bug?

【发布时间】：2019-03-20 22:35:37

【问题描述】：

我正在使用 spring boot 2.0.4 来构建一个 REST 接口。 我正在使用ExceptionHandler 来处理错误。

问题：

当序列化时引发异常时，杰克逊会抛出JsonMappingException。这个异常我用一个默认异常处理程序（捕获所有异常）来处理。

@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
@ResponseBody
@ExceptionHandler(Throwable.class)
public String handleThrowable(final Throwable throwable) 
    return "SERVER ERROR";

现在，当我返回大量对象时出现奇怪的行为，并且由于 RuntimeException 而失败，我没有得到 500 返回。但是我得到了一个200，其中包含第一个序列化对象，然后是错误消息。

示例：

我已经准备了一个完整的问题示例： https://github.com/stefan0001/spring-exception-test/tree/master/src/main/java/test

调用时：

GET http://localhost:8080/test

预期结果：

状态：500 正文：SERVER ERROR

实际结果：

状态：200 正文：

["name":"0","throwException":false,"foo":"bar","name":"1","throwException":false,"foo":"bar","name":"2","throwException":false,"foo":"bar","name":"3","throwException":false,"foo":"bar","name":"4","throwException":false,"foo":"bar","name":"5","throwException":false,"foo":"bar","name":"6","throwException":false,"foo":"bar","name":"7","throwException":false,"foo":"bar","name":"8","throwException":false,"foo":"bar","name":"9","throwException":false,"foo":"bar","name":"10","throwException":false,"foo":"bar","name":"11","throwException":false,"foo":"bar","name":"12","throwException":false,"foo":"bar","name":"13","throwException":false,"foo":"bar","name":"14","throwException":false,"foo":"bar","name":"15","throwException":false,"foo":"bar","name":"16","throwException":false,"foo":"bar","name":"17","throwException":false,"foo":"bar","name":"18","throwException":false,"foo":"bar","name":"19","throwException":false,"foo":"bar","name":"20","throwException":false,"foo":"bar","name":"21","throwException":false,"foo":"bar","name":"22","throwException":false,"foo":"bar","name":"23","throwException":false,"foo":"bar","name":"24","throwException":false,"foo":"bar","name":"25","throwException":false,"foo":"bar","name":"26","throwException":false,"foo":"bar","name":"27","throwException":false,"foo":"bar","name":"28","throwException":false,"foo":"bar","name":"29","throwException":false,"foo":"bar","name":"30","throwException":false,"foo":"bar","name":"31","throwException":false,"foo":"bar","name":"32","throwException":false,"foo":"bar","name":"33","throwException":false,"foo":"bar","name":"34","throwException":false,"foo":"bar","name":"35","throwException":false,"foo":"bar","name":"36","throwException":false,"foo":"bar","name":"37","throwException":false,"foo":"bar","name":"38","throwException":false,"foo":"bar","name":"39","throwException":false,"foo":"bar","name":"40","throwException":false,"foo":"bar","name":"41","throwException":false,"foo":"bar","name":"42","throwException":false,"foo":"bar","name":"43","throwException":false,"foo":"bar","name":"44","throwException":false,"foo":"bar","name":"45","throwException":false,"foo":"bar","name":"46","throwException":false,"foo":"bar","name":"47","throwException":false,"foo":"bar","name":"48","throwException":false,"foo":"bar","name":"49","throwException":false,"foo":"bar","name":"50","throwException":false,"foo":"bar","name":"51","throwException":false,"foo":"bar","name":"52","throwException":false,"foo":"bar","name":"53","throwException":false,"foo":"bar","name":"54","throwException":false,"foo":"bar","name":"55","throwException":false,"foo":"bar","name":"56","throwException":false,"foo":"bar","name":"57","throwException":false,"foo":"bar","name":"58","throwException":false,"foo":"bar","name":"59","throwException":false,"foo":"bar","name":"60","throwException":false,"foo":"bar","name":"61","throwException":false,"foo":"bar","name":"62","throwException":false,"foo":"bar","name":"63","throwException":false,"foo":"bar","name":"64","throwException":false,"foo":"bar","name":"65","throwException":false,"foo":"bar","name":"66","throwException":false,"foo":"bar","name":"67","throwException":false,"foo":"bar","name":"68","throwException":false,"foo":"bar","name":"69","throwException":false,"foo":"bar","name":"70","throwException":false,"foo":"bar","name":"71","throwException":false,"foo":"bar","name":"72","throwException":false,"foo":"bar","name":"73","throwException":false,"foo":"bar","name":"74","throwException":false,"foo":"bar","name":"75","throwException":false,"foo":"bar","name":"76","throwException":false,"foo":"bar","name":"77","throwException":false,"foo":"bar","name":"78","throwException":false,"foo":"bar","name":"79","throwException":false,"foo":"bar","name":"80","throwException":false,"foo":"bar","name":"81","throwException":false,"foo":"bar","name":"82","throwException":false,"foo":"bar","name":"83","throwException":false,"foo":"bar","name":"84","throwException":false,"foo":"bar","name":"85","throwException":false,"foo":"bar","name":"86","throwException":false,"foo":"bar","name":"87","throwException":false,"foo":"bar","name":"88","throwException":false,"foo":"bar","name":"89","throwException":false,"foo":"bar","name":"90","throwException":false,"foo":"bar","name":"91","throwException":false,"foo":"bar","name":"92","throwException":false,"foo":"bar","name":"93","throwException":false,"foo":"bar","name":"94","throwException":false,"foo":"bar","name":"95","throwException":false,"foo":"bar","name":"96","throwException":false,"foo":"bar","name":"97","throwException":false,"foo":"bar","name":"98","throwException":false,"foo":"bar","name":"99","throwException":false,"foo":"bar","name":"100","throwException":false,"foo":"bar","name":"101","throwException":false,"foo":"bar","name":"102","throwException":false,"foo":"bar","name":"103","throwException":false,"foo":"bar","name":"104","throwException":false,"foo":"bar","name":"105","throwException":false,"foo":"bar","name":"106","throwEx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:false,"foo":"bar","name":"211","throwException":false,"foo":"bar","name":"212","throwException":false,"foo":"bar","name":"213","throwException":false,"foo":"bar","name":"214","throwException":false,"foo":"bar","name":"215","throwException":false,"foo":"bar","name":"216","throwException":false,"foo":"bar","name":"217","throwException":false,"foo":"bar","name":"218","throwException":false,"foo":"bar","name":"219","throwException":false,"foo":"bar","name":"220","throwException":false,"foo":"bar","name":"221","throwException":false,"foo":"bar","name":"222","throwException":false,"foo":"bar","name":"223","throwException":false,"foo":"bar","name":"224","throwException":false,"foo":"bar","name":"225","throwException":false,"foo":"bar","name":"226","throwException":false,"foo":"bar","name":"227","throwException":false,"foo":"bar","name":"228","throwException":false,"foo":"bar","name":"229","throwException":false,"foo":"bar","name":"230","throwException":false,"foo":"bar","name":"231","throwException":false,"foo":"bar","name":"232","throwException":false,"foo":"bar","name":"233","throwException":false,"foo":"bar","name":"234","throwException":false,"foo":"bar","name":"235","throwException":false,"foo":"bar","name":"236","throwException":false,"foo":"bar","name":"237","throwException":false,"foo":"bar","name":"238","throwException":false,"foo":"bar","name":"239","throwException":false,"foo":"bar","name":"240","throwException":false,"foo":"bar","name":"241","throwException":false,"foo":"bar","name":"242","throwException":false,"foo":"bar","name":"243","throwException":false,"foo":"bar","name":"244","throwException":false,"foo":"bar","name":"245","throwException":false,"foo":"bar","name":"246","throwException":false,"foo":"bar","name":"247","throwException":false,"foo":"bar","name":"248","throwException":false,"foo":"bar","name":"249","throwException":false,"foo":"bar","name":"250","throwException":false,"foo":"bar","name":"251","throwException":false,"foo":"bar","name":"252","throwException":false,"foo":"bar","name":"253","throwException":false,"foo":"bar","name":"254","throwException":false,"foo":"bar","name":"255","throwException":false,"foo":"bar","name":"256","throwException":false,"foo":"bar","name":"257","throwException":false,"foo":"bar","name":"258","throwException":false,"foo":"bar","name":"259","throwException":false,"foo":"bar","name":"260","throwException":false,"foo":"bar","name":"261","throwException":false,"foo":"bar","name":"262","throwException":false,"foo":"bar","name":"263","throwException":false,"foo":"bar","name":"264","throwException":false,"foo":"bar","name":"265","throwException":false,"foo":"bar","name":"266","throwException":false,"foo":"bar","name":"267","throwException":false,"foo":"bar","name":"268","throwException":false,"foo":"bar","name":"269","throwException":false,"foo":"bar","name":"270","throwException":false,"foo":"bar","name":"271","throwException":false,"foo":"bar","name":"272","throwException":false,"foo":"bar","name":"273","throwException":false,"foo":"bar","name":"274","throwException":false,"foo":"bar","name":"275","throwException":false,"foo":"bar","name":"276","throwException":false,"foo":"bar","name":"277","throwException":false,"foo":"bar","name":"278","throwException":false,"foo":"bar","name":"279","throwException":false,"foo":"bar","name":"280","throwException":false,"foo":"bar","name":"281","throwException":false,"foo":"bar","name":"282","throwException":false,"foo":"bar","name":"283","throwException":false,"foo":"bar","name":"284","throwException":false,"foo":"bar","name":"285","throwException":false,"foo":"bar","name":"286","throwException":false,"foo":"bar","name":"287","throwException":false,"foo":"bar","name":"288","throwException":false,"foo":"bar","name":"289","throwException":false,"foo":"bar","name":"290","throwException":false,"foo":"bar","name":"291","throwException":false,"foo":"bar","name":"292","throwException":false,"foo":"bar","name":"293","throwException":false,"foo":"bar","name":"294","throwException":false,"foo":"bar","name":"295","throwException":false,"foo":"bar","name":"296","throwException":false,"foo":"bar","name":"297","throwException":false,"foo":"bar","name":"298","throwException":false,"foo":"bar","name":"299","throwException":false,"foo":"bar","name":"300","throwException":false,"foo":"bar","name":"301","throwException":false,"foo":"bar","name":"302","throwException":false,"foo":"bar","name":"303","throwException":false,"foo":"bar","name":"304","throwException":false,"foo":"bar","name":"305","throwException":false,"foo":"bar","name":"306","throwException":false,"foo":"bar","name":"307","throwException":false,"foo":"bar","name":"308","throwException":false,"foo":"bar","name":"309","throwException":false,"foo":"bar","name":"310","throwException":false,"foo":"bar","name":"311","throwException":false,"foo":"bar","name":"312","throwException":false,"foo":"bar","name":"313","throwException":false,"foo":"bar","name":"314","throwException":false,"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ERROR

查看响应正文末尾的SERVER ERROR。

我不知道这是错误还是故意。 看起来回复已经写好了或类似的东西......

参考资料：

SPRING JIRA ISSUE

GITHUB EXAMPLE

【问题讨论】：

你能分享控制器并请求有效载荷吗？

你可以在 git repo 中找到控制器。他们没有请求有效负载：github.com/stefan0001/spring-exception-test/blob/master/src/…

【参考方案1】：

一旦提交了 HTTP 响应，就无法更改 HTTP 状态或标头。那时，该响应可能位于网络缓冲区中，甚至已经发送到客户端。到那时，就没有办法收回了。

所以在这种情况下，Spring 无法更改响应。

从客户端的角度来看，如果响应不完整（例如，它的长度反映了Content-Length 标头），则为then the RFC says the client should close the connection and consider the response incomplete。