问题
I'm trying to implement proper logout for my Java EE / JSF2 application.
It requires two things:
- I need to logout from JAAS and invalidate the session
- I then have to navigate to an external URL to fire Siteminder logout
The Siteminder logout URL (configured on the Policy server -> I cannot change it) is outside my applications context. Eg. if my webapp URL is https://localhost:8080/sm/MyWebApp then the logout URL is https://localhost:8080/anotherwebapp/logout.html.
This is the current local logout code:
public void logout() {
System.out.println("Logging out...");
HttpServletRequest request = (HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest();
try {
request.logout();
} catch (ServletException e) {
e.printStackTrace();
}
HttpSession session = (HttpSession)FacesContext.getCurrentInstance().getExternalContext().getSession(false);
if (session != null) {
session.invalidate();
}
}
And here is the property that produces the logout URL:
public String getLogoutUrl() {
HttpServletRequest request = (HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest();
String requestServer = request.getServerName();
String requestScheme = request.getScheme();
int serverPort = request.getServerPort();
String logoutUrl = requestScheme + "://" + requestServer + ":" + Integer.toString(serverPort) + "/anotherwebapp/logout.html";
return logoutUrl;
}
However, I cannot find a JSF2 / Primefaces component that can call logout() then open the external URL. For example, if I have:
<h:outputLink value="#{authBean.logoutUrl}" onclick="#{authBean.logout()}">[Logout]</h:outputLink>
then onclick does not seem to be called.
Another way I tried was putting the external URL to the end of the logout function to have it returned as a navigation string but it is not recognized (also tried with "?faces-redirect=true"...).
Any help would be appreciated.
回答1:
You can create a page logout.xhtml, so the code will look like this:
public String getLogoutUrl() {
return "/logout.jsf";
}
and in the page add:
<META HTTP-EQUIV="Refresh" CONTENT="0;URL=https://localhost:8080/anotherwebapp/logout.html">
回答2:
You can also just use ExternalContext#redirect().
public void logout() throws ServletException, IOException {
ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();
((HttpServletRequest) ec.getRequest()).logout();
ec.invalidateSession();
ec.redirect("http://example.com/anothercontext/logout");
}
No need for an intermediating page with a meta refresh.
来源:https://stackoverflow.com/questions/3297579/navigate-to-external-url-from-a-backing-bean