The browser's back button doesn't work for portlet navigation

Question

I developed a simple portlet that uses webflow navigation to navigate within a
portlet. I made this portlet visible on a portal's home page. When I view my
main portal page, the URL is "http://localhost:7501/samplePortal/index.jsp "
In this page I can see my portlet. When I click on a link inside of the portlet,
it takes me to the page I want. Then, when I click the browser's back button
to go back to the previous page(main portal page), it doesn't work. The URL changes
back to "http://localhost:7501/samplePortal/index.jsp", but portlet itself doesn't
take me to the previous page. Anybody have any ideas? I am guessing it's because
the wfevent is null, but how do I resolve this problem?

Answer 1

Hi Jay,
I was able to get the back button to work for portals by commenting out the following
lines in the portal.jsp:
// prevent caching these pages at clients.
// response.setHeader("Cache-Control", "no-cache"); // HTTP 1.1
// response.setHeader("Pragma", "no-cache"); // HTTP 1.0
// response.setDateHeader("Expires", 0); // prevents caching at proxy
I also made sure my browser was set to allow the caching of pages.
You are having problems, because we set the response headers to tell the browser
to not cache the portal pages, and the portlet state has not changed back to it's
original state.
-John Bimson
"Jay" <[email protected]> wrote:
>
I developed a simple portlet that uses webflow navigation to navigate
within a
portlet. I made this portlet visible on a portal's home page. When
I view my
main portal page, the URL is "http://localhost:7501/samplePortal/index.jsp
In this page I can see my portlet. When I click on a link inside of
the portlet,
it takes me to the page I want. Then, when I click the browser's back
button
to go back to the previous page(main portal page), it doesn't work.
The URL changes
back to "http://localhost:7501/samplePortal/index.jsp", but portlet itself
doesn't
take me to the previous page. Anybody have any ideas? I am guessing
it's because
the wfevent is null, but how do I resolve this problem?