It won't be possible to detect that the given request reached your
application because a user hit the Back button. There is no indication
in HTTP protocol that could tell you so.
Regards
Łukasz
wt., 25 sty 2022 o 22:58 albert kao <albertk...@gmail.com> napisał(a):
>
> If the user presses the Back button of a browser, my application likes to
> intercept that and display a text message at the current web page.
> How to do that without using javascript?
>
> The following codes show an approach with AbstractInterceptor.
> Please review whether it will work.
> If yes, how to get the flag or value that the Back button of a browser was
> pressed?
> If not, please suggest alternatives.
> Thanks.
>
>
> import java.util.Map;
>
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.http.HttpSession;
>
> import org.apache.struts2.StrutsStatics;
>
> import com.opensymphony.xwork2.ActionContext;
> import com.opensymphony.xwork2.ActionInvocation;
> import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
>
>
> public class MyInterceptor extends AbstractInterceptor {
> private Map<String, Object> session;
>
> @Override
> public class MyInterceptor extends AbstractInterceptor {
> private Map<String, Object> session;
>
> @Override
> public String intercept(ActionInvocation invocation) throws Exception {
> final ActionContext context = invocation.getInvocationContext();
> session = context.getSession();
> HttpServletRequest request = (HttpServletRequest);
> context.get(StrutsStatics.HTTP_REQUEST);
> HttpSession httpSession = request.getSession(true);
>
> synchronized (httpSession) {
> //...
> }
> }
> }
>
> Struts version is 2.5.26.
>
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