spring - 如何在请求上传期间处理客户端中止？

Question

给定以下应用程序，基于 Spring Initializr模板

@SpringBootApplication
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

    public static class Payload {
        public String field1;
        public String field2;
    }

    @RestController
    public static class MyController {
        @RequestMapping("/echo")
        public ResponseEntity<Payload> echo(@RequestBody Payload payload) {
            return new ResponseEntity<>(payload, HttpStatus.OK);
        }
    }
}

如果我在发送 header 后中止连接

$ nc 192.168.56.1 8080
POST /echo HTTP/1.1
Host: 192.168.56.1:8080
Content-Type: application/json
Content-Length: 42

^C

然后服务器尝试用 400 响应并记录以下内容

2016-05-03 16:56:28.916  WARN 5776 --- [nio-8080-exec-2] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Unexpected EOF read on the socket; nested exception is java.io.EOFException: Unexpected EOF read on the socket
2016-05-03 16:56:28.997 ERROR 5776 --- [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost]           : Exception Processing ErrorPage[errorCode=0, location=/error] org.apache.catalina.connector.ClientAbortException: java.io.IOException: An established connection was aborted by the software in your host machine

如果客户端在发送请求后中止，则默认情况下不会记录任何内容，并且生成的 ClientAbortException 可通过 ErrorAttributes#getError 在过滤器中使用。

如何以相同的方式处理请求期间的中止？也就是说，默认情况下不记录任何警告/错误，并启用自定义过滤器以告知客户端已中止。

Answer 1

我找到了一个解决方案，但还没有找到它做错事的案例。

@Autowired
private DefaultErrorAttributes defaultExceptionResolver;
    
@ExceptionHandler(HttpMessageNotReadableException.class)
public void checkForAbort(HttpServletRequest request, HttpServletResponse response, RuntimeException exception) {
    if (exception.getCause() instanceof EOFException) {
        ClientAbortException abortException = new ClientAbortException(exception.getCause());
        abortException.addSuppressed(exception);
        try {
            response.getOutputStream().close();
        }
        catch (IOException ex) {
            abortException.addSuppressed(ex);
        }

        defaultExceptionResolver.resolveException(request, response, null, abortException);
    }
    else {
        throw exception;
    }
}

这可能会进入，例如，@ControllerAdvice。