My Java web app uses two servlets to control form processing and navigation, /AppControl
and /ViewControl
.
AppControl processes form submissions, then forwards the request to ViewControl, which determines which page was processed and re-forwards the request to the "next" page.
The first forward (between servlets) works okay; but the second (from ViewControl to the JSP page) malforms the URL, and I get a 404.
The servlets are both mapped to root of context, the JSP files are in a subfolder named /view/
Forward #1 goes from /AppControl
to /ViewControl
, and forward #2 goes from /ViewControl to /view/xxx.jsp
, but what appears in browser is localhost:8080/view//view/xxx.jsp
, which is obviously not where it should've gone. Notice the context is missing from the URL sent to the browser, and an extra instance of the string "/view/" is being embedded.
I've tried:
- switching between using
ServerContext
andServerRequest
for theRequestDispatcher
- using absolute and relative paths ("./" -- is that a valid relative path?)
- attaching (pre-pending) the contextPath to the URL
and various other hacks and gyrations, but nothing seems to make it work; it keeps changing the URL sent to the browser to something other than the URL which appears in debug (assoc'd with RD).
BTW, the request originates from (referrer?) localhost:8080/(context)/view/zzz.jsp
, POSTed to /AppControl
;
I'm using getServletContext().getRequestDispatcher(java.lang.String) to forward, so I was under the impression that the target resource is relative to the root of the context.
Here's what I've tried, and the results I've had:
URL String Param | Resulting URL
---------------------|---------------
/view/xxx.jsp | localhost:8080/view//view/xxx.jsp
./xxx.jsp | localhost:8080/myApp/xxx.jsp
./view/xxx.jsp | localhost:8080/view/view/xxx.jsp
/myApp/view/xxx.jsp | localhost:8080/myApp/myApp/view/xxx.jsp
I'll follow up this post with actual code, and maybe screenshots (if I can do that)... my environment:
- Java 6.0_34
- Eclipse Juno (4.2.0)
- Tomcat 7.0.21.
code:
//get page navigation info
setNavigation();
session.setAttribute("viewControl", this.pageNext);
//navigate to this.pageNext
//response.sendRedirect(this.pageNext);
pageForward(request, response, this.pageNext);
}
}else {
pageForward(request, response, this.appStartPage);
}
}
private void pageForward(HttpServletRequest request, HttpServletResponse response, String url)
throws ServletException, IOException {
RequestDispatcher rd = getServletContext().getRequestDispatcher(url);
//RequestDispatcher rd = request.getRequestDispatcher(url);
rd.forward(request, response);
}
private void setNavigation() {
//this.urlViewBase = this.urlAppBase + "/view/";
this.urlViewBase = "/view/";
//this.urlViewBase = "./";
//this.urlViewBase = "./view/";
if (this.pageCurrent.equals("StartView.jsp")) {
this.pageNext = this.urlViewBase + "ApplicantInfo.jsp";
this.pagePrevious = this.urlViewBase + "StartView.jsp";
}
else if (this.pageCurrent.equals("ApplicantInfo.jsp")) {
this.pageNext = this.urlViewBase + "ApplicantAddress.jsp";
this.pagePrevious = this.urlViewBase + "StartView.jsp";
}
else if (this.pageCurrent.equals("ApplicantAddress.jsp")) {
this.pageNext = this.urlViewBase + "Menu.jsp";
this.pagePrevious = this.urlViewBase + "ApplicantInfo.jsp";
}
else if (this.pageCurrent.equals("Menu.jsp")) {
this.pageNext = this.urlViewBase + "Menu.jsp";
this.pagePrevious = this.urlViewBase + "ApplicantAddress.jsp";
}
else {
this.pageNext = this.urlViewBase + "StartView.jsp";
this.pagePrevious = this.urlViewBase + "StartView.jsp";
}
}