spring java:拦截器sendRedirect循环

时间:2014-07-17 03:22:21

标签: java spring spring-mvc

我实现了一个拦截器,它执行某些检查并将sendRedirect发送到某个页面。目前我正在测试它没有任何条件,只需简单地调用preHandle时sendRedirect。这是我的实施:

class HttpInterceptorMgr implements HandlerInterceptor {
    public boolean preHandle(HttpServleRequest aRequest, HttpServletResponse aResponse, Object aHandler) {
     try {
      sendRedirect("/somepage");
      return false;
     }
     catch(Exceptio n e) {
      // Do something else
     }
    }
}

的web.xml

<servlet-mapping>
 <servlet-name>myproject</servlet-name>
 <url-pattern>/</url-pattern>
</servlet-mapping>

....
<filter>
 <filter-name>springSecurityFilterChain</filter-name>
 <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>

<filter-mapping>
 <filter-name>springSecurityFilterChain</filter-name>
 <url-pattern>/*</url-pattern>
</filter-mapping>
...

的myproject-web的servlet.xml中

<mvc:annotation-driven />
<mvc:resources mapping="/resources/**" location="/resources/" />
<mvc:resources mapping="/js/**" location="/js/" />
<mvc:resources mapping="/css/**" location="/css/" />
<mvc:resources mapping="/images/**" location="/images/" />

<mvc:interceptors>
 <bean class="org.mycompany.HttpInterceptorMgr" />
</mvc:interceptors>

applicationContextSecurityBeans.xml

<security:http auto-config="true" use-expression="true" access-denied-page="/user/denied">
 <security:form-login
   login-page="/login"
   authentication-failure-url="login?error=true"
   default-target-url="/homepage" />
 <security:logout invalidate-session="true"
   logout-success-url="/login"
   logout-url="/j_sring_security_logout" />
</security:http>

我面临的问题是我的页面在循环中重定向。在firefox浏览器上,它说&#34;页面没有正确地重定向&#34;。我尾巴catalina.out并显示它多次进入预处理,其request.getRequestUrl为/somepage。但我无法成功到达该页面。

1 个答案:

答案 0 :(得分:0)

发生的事情是因为你的拦截器没有条件,即使重定向请求到“/ somepage”它再次发送重定向,这将在循环中进行。

您可以检查请求是否发往“/ somepage”,如果是,则不应再次重定向。

class HttpInterceptorMgr implements HandlerInterceptor {
    public boolean preHandle(HttpServleRequest aRequest, HttpServletResponse aResponse, Object aHandler) {
     try {
      if(!aRequest.getRequestURL().toString().endswith("/somepage")) {
          sendRedirect("/somepage");
          return false;
      }          
     }
     catch(Exceptio n e) {
      // Do something else
     }
     return true;
    }
}