Swagger-ui在文件上传时报错net::ERR_CONNECTION_RESET

我会带着你远行 2021-11-16 16:01 496阅读 0赞

Swagger-ui在文件上传时报错net::ERR_CONNECTION_RESET

项目版本

spring-boot 2.1.6.RELEASE

swagger 2.7.0

在使用swagger做接口测试的时候遇到了一个诡异的问题，在文件超过限制大小的时候，没有按照全局异常拦截返回相应的错误码，而是直接抛出了一个net::ERR_CONNECTION_RESET的报错，页面没有任何返回显示

测试代码如下

controller

  1. @PostMapping
  2. @ApiOperation(value = "/upload", notes = "upload", httpMethod = "POST")
  3. public ResultVO<Void> upload(@RequestPart(name = "file") MultipartFile file) throws Exception {
  4.     saveFile(FILE_SAVE_PATH, file.getOriginalFilename(), file);
  5.     return ResultVO.success();
  6. }

全局异常拦截配置

  1. @Slf4j
  2. @RestControllerAdvice
  3. public class GlobalExceptionHandler {
  5.     @ExceptionHandler(value = Exception.class)
  6.     public ResultVO<Void> exceptionHandler(Exception e) {
  7.         log.info("go to global exception handler: {}", e);
  8.         return ResultVO.error(ResultStateEnum.ERROR);
  10.     }
  11. }

配置文件

  1. server:
  2.   port: 10001
  3. spring:
  4.   application:
  5.     name: spring-cloud-upload-swagger-demo
  6.   servlet:
  7.     multipart:
  8.       max-file-size: 30MB
  9.       max-request-size: 30MB

运行项目，打开swagger页面

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上传一个小于30MB的文件，得到成功的返回

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查看后台文件大小

  1. INFO 1016 --- [io-10001-exec-1] c.m.d.u.s.controller.DemoController      : file:springcloudgateway.jpg, size:46343

再上传超过30MB的文件，则没有任何返回显示

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查看控制台，显示报错信息
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查看后台打印，确实进入了全局异常

  1. INFO 1016 --- [io-10001-exec-3] c.m.d.u.s.config.GlobalExceptionHandler  : go to global exception handler: {}
  3. 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 (39356221) exceeds the configured maximum (31457280)
  4.     at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.handleParseFailure(StandardMultipartHttpServletRequest.java:121) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  5.     at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:114) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  6.     at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:87) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  7.     at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:87) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  8.     at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1176) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  9.     at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1011) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  10.     at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  11.     at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  12.     at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) [spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  13.     at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) [tomcat-embed-core-9.0.21.jar:9.0.21]
  14.     at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  15.     at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) [tomcat-embed-core-9.0.21.jar:9.0.21]
  16.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-9.0.21.jar:9.0.21]
  17.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar:9.0.21]
  18.     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.21.jar:9.0.21]
  19.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar:9.0.21]
  20.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar:9.0.21]
  21.     at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  22.     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  23.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar:9.0.21]
  24.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar:9.0.21]
  25.     at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  26.     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  27.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar:9.0.21]
  28.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar:9.0.21]
  29.     at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  30.     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  31.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar:9.0.21]
  32.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar:9.0.21]
  33.     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  34.     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  35.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar:9.0.21]
  36.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar:9.0.21]
  37.     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) [tomcat-embed-core-9.0.21.jar:9.0.21]
  38.     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.21.jar:9.0.21]
  39.     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.21.jar:9.0.21]
  40.     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.21.jar:9.0.21]
  41.     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.21.jar:9.0.21]
  42.     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.21.jar:9.0.21]
  43.     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.21.jar:9.0.21]
  44.     at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.21.jar:9.0.21]
  45.     at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.21.jar:9.0.21]
  46.     at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) [tomcat-embed-core-9.0.21.jar:9.0.21]
  47.     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) [tomcat-embed-core-9.0.21.jar:9.0.21]
  48.     at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.21.jar:9.0.21]
  49.     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_191]
  50.     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_191]
  51.     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.21.jar:9.0.21]
  52.     at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191]
  53. Caused by: java.lang.IllegalStateException: org.apache.tomcat.util.http.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (39356221) exceeds the configured maximum (31457280)
  54.     at org.apache.catalina.connector.Request.parseParts(Request.java:2925) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  55.     at org.apache.catalina.connector.Request.parseParameters(Request.java:3214) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  56.     at org.apache.catalina.connector.Request.getParameter(Request.java:1116) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  57.     at org.apache.catalina.connector.RequestFacade.getParameter(RequestFacade.java:381) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  58.     at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:84) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  59.     ... 23 common frames omitted
  60. Caused by: org.apache.tomcat.util.http.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (39356221) exceeds the configured maximum (31457280)
  61.     at org.apache.tomcat.util.http.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:808) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  62.     at org.apache.tomcat.util.http.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:256) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  63.     at org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:280) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  64.     at org.apache.catalina.connector.Request.parseParts(Request.java:2881) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  65.     ... 27 common frames omitted

对比使用POSTMAN进行测试上传同一个文件，则能得到正确的全局异常定义的返回

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找到一个临时的解决方案

将配置文件的文件大小调高

  1. server:
  2.   port: 10001
  3. spring:
  4.   application:
  5.     name: spring-cloud-upload-swagger-demo
  6.   servlet:
  7.     multipart:
  8.       max-file-size: 100MB
  9.       max-request-size: 100MB

再添加手动的文件上传拦截器

  1. @Component
  2. public class FileUploadInterceptor implements HandlerInterceptor {
  3.     private final long MAX_FILE_SIZE = 30 * 1024 * 1024;
  5.     @Override
  6.     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
  7.         if (null != request && ServletFileUpload.isMultipartContent(request)) {
  8.             long requestSize = new ServletRequestContext(request).contentLength();
  9.             if (requestSize > MAX_FILE_SIZE) {
  10.                 throw new MaxUploadSizeExceededException(MAX_FILE_SIZE);
  11.             }
  12.         }
  13.         return true;
  14.     }
  15. }

将文件上传拦截器加入

  1. @Component
  2. public class InterceptorConfig implements WebMvcConfigurer {
  4.     @Autowired
  5.     private FileUploadInterceptor fileUploadInterceptor;
  7.     @Override
  8.     public void addInterceptors(InterceptorRegistry registry){
  9.         registry.addInterceptor(fileUploadInterceptor);
  10.     }
  11. }

重启项目，测试上传

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临时方案二，发现导致连接重置的配置是max-request-size

修改配置文件，去掉拦截器

max-request-size可以设置的比较大，-1测试的情况来看也不是大小无限制

  1. server:
  2.   port: 10001
  3. spring:
  4.   application:
  5.     name: spring-cloud-upload-swagger-demo
  6.   servlet:
  7.     multipart:
  8.       max-file-size: 30MB
  9.       max-request-size: -1

尝试切换了Jetty和Undertow两个不同的servlet容器也是会有问题

GITHUB源码参考

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