文件上传客户端无法从春季获得响应

Question

我正在开发一个Spring Boot应用程序，其中有一个用于图库功能的图像文件上传。我想限制图像的文件大小，并在超出大小时在其余端点上返回错误消息。

我当前的设置如下。

我的控制器

@RestController
@RequestMapping("/api/gallery")
class GalleryController {
    @PostMapping("/upload/{eventYear}/{eventIdentifier}")
    public ImageUploadResponseDto uploadImage(@RequestParam("file") MultipartFile file, @PathVariable("eventYear") int year, @PathVariable("eventIdentifier") String identifier) {
        // do something with the file
    }
}

用于错误处理的控制器建议

@ControllerAdvice
class GlobalExceptionHandler {
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    @ResponseBody
    @ExceptionHandler({MaxUploadSizeExceededException.class})
    public ValidationException handleSizeExceededException(MaxUploadSizeExceededException ex): ValidationException {
        return ValidationKeys.FILE_SIZE_EXCEEDED.makeException(nestedCause = ex)
    }
}

application.yml

spring:
    servlet:
        multipart:
            max-file-size: 10MB
            max-request-size: 10MB

除了可以正常工作外，您会发现其他错误，但当我向Postman提出请求时，会收到此错误。

但是当我查看spring应用程序的日志时，它说响应已按要求编写，并且已捕获超出文件大小限制的异常。

2018-08-18 20:30:53.180 TRACE 10520 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Found 1 matching mapping(s) for [/api/gallery/upload/2018/konzert_1] : [{[/api/gallery/upload/{eventYear}/{eventIdentifier}],methods=[POST]}]
2018-08-18 20:30:53.180 DEBUG 10520 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Returning handler method [public ch.mginsmoerigen.server.web.model.ImageUploadResponseDto ch.mginsmoerigen.server.web.controller.GalleryController.uploadImage(org.springframework.web.multipart.MultipartFile,int,java.lang.String)]
2018-08-18 20:30:53.182 TRACE 10520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Bound request context to thread: org.apache.catalina.connector.RequestFacade@5bf77c94
2018-08-18 20:30:53.182 DEBUG 10520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : DispatcherServlet with name 'dispatcherServlet' processing POST request for [/api/gallery/upload/2018/konzert_1]
2018-08-18 20:30:53.184 DEBUG 10520 --- [nio-8080-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.multipart.MaxUploadSizeExceededException: Maximum upload size exceeded; nested exception is java.lang.IllegalStateException: org.apache.tomcat.util.http.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (14776581) exceeds the configured maximum (10485760)
2018-08-18 20:30:53.187 DEBUG 10520 --- [nio-8080-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Invoking @ExceptionHandler method: public ch.mginsmoerigen.server.web.exception.ValidationException ch.mginsmoerigen.server.web.config.GlobalExceptionHandler.handleSizeExceededException(org.springframework.web.multipart.MaxUploadSizeExceededException)
2018-08-18 20:30:53.188 TRACE 10520 --- [nio-8080-exec-1] .w.s.m.m.a.ServletInvocableHandlerMethod : Invoking 'ch.mginsmoerigen.server.web.config.GlobalExceptionHandler.handleSizeExceededException' with arguments [org.springframework.web.multipart.MaxUploadSizeExceededException: Maximum upload size exceeded; nested exception is java.lang.IllegalStateException: org.apache.tomcat.util.http.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (14776581) exceeds the configured maximum (10485760)]
2018-08-18 20:30:53.189 TRACE 10520 --- [nio-8080-exec-1] .w.s.m.m.a.ServletInvocableHandlerMethod : Method [ch.mginsmoerigen.server.web.config.GlobalExceptionHandler.handleSizeExceededException] returned [ch.mginsmoerigen.server.web.exception.ValidationException: i18n.error.http.fileSizeExceeded.message]
2018-08-18 20:30:53.301 DEBUG 10520 --- [nio-8080-exec-1] m.m.a.RequestResponseBodyMethodProcessor : Written [ch.mginsmoerigen.server.web.exception.ValidationException: i18n.error.http.fileSizeExceeded.message] as "application/json" using [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter@5feaada1]
2018-08-18 20:30:53.301  WARN 10520 --- [nio-8080-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Resolved exception caused by Handler execution: org.springframework.web.multipart.MaxUploadSizeExceededException: Maximum upload size exceeded; nested exception is java.lang.IllegalStateException: org.apache.tomcat.util.http.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (14776581) exceeds the configured maximum (10485760)
2018-08-18 20:30:53.301 DEBUG 10520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
2018-08-18 20:30:53.301 TRACE 10520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@5bf77c94
2018-08-18 20:30:53.302 DEBUG 10520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Successfully completed request

因此，根据我的应用程序，一切正常，响应主体已设置。

现在对我来说是最令人困惑的部分。 为了查看响应是否真的写得正确，我安装了提琴手，它可以拦截到Spring Boot应用程序的流量。

现在，当提琴手运行时，我的响应会传递给邮递员，并且在提琴手的检查器工具中也可以看到，但是一旦提琴手关闭，便无法再进行任何操作。

提琴手运行时的邮递员

在提琴手中请求

当提琴手追赶响应时会发生什么？

仅在Windows上出现问题。在我的Ubuntu VM中，它就像一个魅力。