[I] ServiceComb框架相比于SpringMvc在处理MultipartFile表单文件有什么优化 [servicecomb-java-chassis]

["xxffzq (via GitHub)" <gi...@apache.org>]

xxffzq opened a new issue, #4267:
URL: https://github.com/apache/servicecomb-java-chassis/issues/4267

   代码本来使用了ServiceComb版本2.8.6，切换为SpringMVC 版本5.3.31后，发现有一个上传文件的接口效率下降了
   
   业务代码如下
   `
       @ResponseBody
       @PostMapping(value = "/uploadFile", produces = MediaType.MULTIPART_FORM_DATA)
       public Response upload1File(@NotNull MultipartFile file, HttpServletRequest request) {
           try (InputStream inputStream = file.getInputStream();) {
               // 具体业务
           }
       }
   `
   
   分析了火焰图，发现使用了MVC框架后，主要在这部分消耗比较多时间
   
   [40]48.31% 9,101 self: 0.02% 3 orglapache/tomcat/util/http/fileupload/MultipartStreamSItemInputStream.makeAvailable
   .. [41]30.95% 5,830 self 0.02% 3 org/apache/tomcat/util/http/fileupload/MultipartStreamSItemInputStream.findSeparator
   [42]30.93% 5,827 self: 30.93% 5,827 org/apache/tomcat/util/http/fileupload/MultipartStream.findSeparator
   
   serviceComb 处理表单的方法
   io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder#findMultipartDelimiter
   
   
   想问下ServiceComb在对于MultipartFile文件接口有没有做什么优化，还是说可能只是底层一个是tomcat，一个是netty的原因
   


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Re: [I] ServiceComb框架相比于SpringMvc在处理MultipartFile表单文件有什么优化 [servicecomb-java-chassis]

["liubao68 (via GitHub)" <gi...@apache.org>]

liubao68 commented on issue #4267:
URL: https://github.com/apache/servicecomb-java-chassis/issues/4267#issuecomment-2268095286

   java chassis的上传下载支持 `REST over servlet` 和 `Rest over vert.x`两种模式。 不同的模式相对于spring boot，都是完全重新实现的，不依赖于Spring MVC的实现。 参考: [Java Chassis与Spring Boot 集成介绍](https://servicecomb.apache.org/references/java-chassis/zh_CN/spring-boot/introduction.html)


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Re: [I] ServiceComb框架相比于SpringMvc在处理MultipartFile表单文件有什么优化 [servicecomb-java-chassis]

["SweetWuXiaoMei (via GitHub)" <gi...@apache.org>]

SweetWuXiaoMei commented on issue #4267:
URL: https://github.com/apache/servicecomb-java-chassis/issues/4267#issuecomment-2499400442

   比较高效的原因，大概是两个，1是利用vert.x分段上传，2是异步执行。代码查看：RestBodyHandler


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