HTTP 400 与 SpringMVC的 HttpPutFormContentFilter、FormContentFilter

前端发送了一个http PUT请求，如下，

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100.0000018367064 " stroke="#585858" fill="none" stroke-width="" stroke-linecap="round" stroke-linejoin="round" marker-start="url(#sid-4C7A6A41-1232-4A72-85FB-9BED42A67166start)" marker-end="url(#sid-4C7A6A41-1232-4A72-85FB-9BED42A67166end)"/></g><text id="sid-4C7A6A41-1232-4A72-85FB-9BED42A67166text_name" x="" y="" oryx:edgePosition="startTop" stroke-width="0pt" letter-spacing="-0.01px" transform="rotate(360 399 100)" oryx:fontSize="" text-anchor="start"><tspan dy="" x="" y="">审批完成</tspan></text></g><g class="children" style="overflow:hidden"/><g class="edge"/></g><g class="controls"><g class="dockers"/><g class="magnets"/></g></g><g id="svg-sid-E65B8FF2-BD71-4B73-8550-D14A0982559A"><g class="stencils"><g class="me"><g pointer-events="painted"><path id="sid-FEEEF50F-D98F-412C-BFCF-2954A2D9BFB1_1" d="M380.00001469508635 119.98437664299126L380.0000037078511 239.62500040177952 " stroke="#585858" fill="none" stroke-width="" stroke-linecap="round" stroke-linejoin="round" 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oryx:fontSize="" text-anchor="start"><tspan dy="" x="" y="">重新提交审批</tspan></text></g><g class="children" style="overflow:hidden"/><g class="edge"/></g><g class="controls"><g class="dockers"/><g class="magnets"/></g></g></g></g><g class="svgcontainer"><g display="none"><rect x="" y="" stroke-width="" stroke="#777777" fill="none" stroke-dasharray="2,2" pointer-events="none"/></g><g display="none"><path stroke-width="" stroke="silver" fill="none" stroke-dasharray="5,5" pointer-events="none"/></g><g display="none"><path stroke-width="" stroke="silver" fill="none" stroke-dasharray="5,5" pointer-events="none"/></g><g/></g></g></svg>
name: 计划发布流程aaa
description: 计划发布流程

后端出现错误：

-- ::38.268 ERROR  --- [io--exec-] c.e.p.w.c.c.ELProcModelController        : 缺少请求参数

org.springframework.web.bind.MissingServletRequestParameterException: Required String parameter 'name' is not present
    at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:) ~[spring-web-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:) ~[spring-web-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:) ~[spring-web-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:) ~[spring-web-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:) ~[spring-web-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:) ~[spring-webmvc-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:) ~[spring-webmvc-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:) ~[spring-webmvc-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:) ~[spring-webmvc-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:) ~[spring-webmvc-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:) ~[spring-webmvc-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:) [spring-webmvc-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPut(FrameworkServlet.java:) [spring-webmvc-5.1..RELEASE.jar!/:5.1..RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:) [spring-webmvc-5.1..RELEASE.jar!/:5.1..RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:) [tomcat-embed-websocket-9.0..jar!/:9.0.]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.filters.RemoteIpFilter.doFilter(RemoteIpFilter.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.filters.RemoteIpFilter.doFilter(RemoteIpFilter.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:) [druid-1.1..jar!/:1.1.]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:) [spring-web-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:) [spring-web-5.1..RELEASE.jar!/:5.1..RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:) [na:1.8.0_212]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:) [na:1.8.0_212]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:) [tomcat-embed-core-9.0..jar!/:9.0.]
    at java.lang.Thread.run(Thread.java:) [na:1.8.0_212]

关键信息是：缺少请求参数

全局搜索，找到了：

    @ResponseBody
    @ResponseStatus(code = HttpStatus.BAD_REQUEST)
    @ExceptionHandler(BindException.class)
    public CommonResponse MethodArgumentNotValidHandler(BindException exception) throws Exception {
        logger.error("参数绑定验证失败:", exception);
        return CommonResponse.createCustomCommonResponse(String.valueOf(HttpStatus.BAD_REQUEST.value()),
                "缺少请求参数");
    }

    /**
     * @param
     * @return
     * @description 缺少参数
     * @author lk
     * @version v1.0
     * @date 2017/9/6
     */
    @ResponseBody
    @ResponseStatus(code = HttpStatus.BAD_REQUEST)
    @ExceptionHandler(MissingServletRequestParameterException.class)
    public CommonResponse handleMissingServletRequestParameterException(MissingServletRequestParameterException e) {
        logger.error("缺少请求参数", e);
        return CommonResponse.createCustomCommonResponse(String.valueOf(HttpStatus.BAD_REQUEST.value()),
                "缺少请求参数");
    }

嗯， 应该就是绑定问题，应该是ELProcModelController 的某个mvc方法的绑定问题。（实际上是 save 方法）但是，从错误日志来看，是找不到具体哪个方法的，因为根本都还没进去调用那个方法！ 而是绑定参数的阶段就出了问题！ 所以尝试去设置断点调试那个方法是没有用的！！

当然，调试handleMissingServletRequestParameterException 或MethodArgumentNotValidHandler 方法则是有用的。

奇怪的是，之前都是好好的， 怀疑是升级到spring boot-2.1.3 后就出现了这个问题。 网上的解决方案是 增加这么一个 FIlter，HttpPutFormContentFilter， 不过，这个类已经deprecated 了！why ，看这里：https://github.com/spring-projects/spring-boot/issues/13363

HttpPutFormContentFilter对delete方法不支持，FormContentFilter 更友好！

另外，需要注意到 前端收到400 ，并不是说前端的错误，其实还是 后端的错误。 虽然4xx是表示了前端请求的某些错误。其实不然。

参考

http://www.th7.cn/Program/java/201608/925805.shtml

https://www.oschina.net/question/2621611_2217526

https://blog.csdn.net/geloin/article/details/7444590