On 3/2/06, Anthony Hong <[EMAIL PROTECTED]> wrote: > In this example, click button in inputname.jsp can change page to > greeting.jsp, but the url in IE has no change, means it is as same > "inputname.jsp", click link in greeting.jsp to goodbye.jsp, url in IE > is "greeting.jsp" > Seams it is always one step after current page. it works fine by click > link. but if I refresh current page, it displayed previous page not > current page. > This can be solved by add <redirect/> in each navigation-case. But why > default action has such problem? What is the purpose?
JSF is not a url-centric system. The only url that matters is the one that initially gets you to a page. As you note, the only way to "force" a new url to display is to use <redirect/>, which will cause you to lose any t:saveState or messages data (because a redirect causes two page requests). The "why" is because any action taken on a page causes a post to the same location, and the location is the same page name as the one you came from as it's the only page capable of interpreting your action. A redirect causes a second page request to occur which can "fix" your url if that's something you care about. However, that's not normally a concern. Other related frameworks (like WebObjects, for instance) don't even bother to make the urls have meaning: https://domain/cgi-bin/WebObjects/Application.woa/1/wo/S5q791dgut93QDw3lS1ut0/1.1.25 I think JSF probably could have saved some confusion by doing the same thing so people didn't think the urls displayed in the browser are relevent to the response rendered. I have also set up similar systems under Struts when I've implemented a StateManager to handle back button requests. For instance, here's a Struts URL :) https://domain/application/kqTDWXI4OgKkieWEnFIh1wcv1ZjQnbN85hU_1.5.psc "Meaningful" URLs are only useful when they can be reused. If your JSF application is in such a state that it can reuse the URL (ie, no previous state or messages saved), then all you need to do is throw in a <redirect/> to formally specify that, and the URL will be "meaningful" in the browser.
