隐藏弹簧MVC控制器入口点后面的Apache Camel Servlet

Question

我想隐藏弹簧MVC控制器入口点后面的apache骆驼servlet，因为我有一些专有组件，我必须使用这些组件。

我有以下Apache骆驼路线，该路由正常工作

<route id="Route">
            <from uri="servlet:messages?httpMethodRestrict=POST"/>
            <process ref="..."></process>
            <to uri="{{storage.service.endpoint}}?bridgeEndpoint=true"/>
</route>

我已经注册了没有任何URL映射的骆驼servlet，因为我不想直接访问。弹簧豆：

@Bean
ServletRegistrationBean servletRegistrationBean() {
      CamelHttpTransportServlet camelServlet = new CamelHttpTransportServlet();
      ServletRegistrationBean servletBean = new ServletRegistrationBean(camelServlet, false, new String[]{});
      servletBean.setName("CamelServlet");
      return servletBean;
}

在弹簧控制器的入口点我只需要转发到骆驼servlet：

@RequestMapping(method=RequestMethod.POST, value="/api/v1/*")
public void wrapper(HttpServletRequest request, HttpServletResponse response) throws Exception{
      context.getNamedDispatcher("CamelServlet").forward(request, response);
}

问题是骆驼servlet依赖于使用request.getPathInfo()的ServletResolveconsumersstrategy，它在Spring Controller入口点中始终是null。我在@RequestMapping中尝试了不同的路径，但是总是request.getServletPath()具有完整的路径，而pathInfo为null

P.S。该应用程序在Tomcat8。

Answer 1

使用路径变量修改弹簧控制器入口点，并在自定义HttpServletRequestWrapper中设置路径变量A pathInfo()的值：

  @RequestMapping(path="/api/v1/{messages}" , method=RequestMethod.POST)
  public void wrapper2(HttpServletRequest request, HttpServletResponse response, @PathVariable String messages) throws Exception{
      request = new PathInfoRequestWrapper(request, messages);
      context.getNamedDispatcher("CamelServlet").forward(request, response);
  }
  class PathInfoRequestWrapper extends HttpServletRequestWrapper{
    private String pathInfo;
    public PathInfoRequestWrapper(HttpServletRequest request, String pathInfo) {
       super(request);
       this.pathInfo = pathInfo;
    }
    @Override
    public String getPathInfo(){
        String origPathInfo = super.getPathInfo();
        if(origPathInfo == null || origPathInfo.equals("")){
            return this.pathInfo;
        }else{
            return origPathInfo;
        }
    }
  }

Answer 2

一种解决方案是创建仅依赖request.getServletPath()的自定义ServletResolveConsumerStrategy来找到适当的路由。不幸的是，仅使用org.apache.camel.http.common.CamelServlet.setServletResolveConsumerStrategy(ServletResolveConsumerStrategy)设定策略不起作用，因为它在org.apache.camel.camel.component.servlet.camelhttptransportservlet.init方法中被覆盖。因此，您还需要覆盖骆驼sers脚的初始化：

CamelHttpTransportServlet camelServlet = new CamelHttpTransportServlet(){
          @Override
          public void init(ServletConfig config) throws ServletException {
              super.init(config);
              ServletResolveConsumerStrategy servletResolveConsumerStrategy = new CamelSpringResolveConsumerStrategy();
              setServletResolveConsumerStrategy(servletResolveConsumerStrategy );
          }
      };