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Author

Servlet Problem with Back Button on IE

Mahesh Kumar Kumar
Greenhorn

Joined: Jul 14, 2005
Posts: 8
Hello All:

This is a weird problem I am facing on IE.

I have a servlet which is invoked by the doGet() method. This servlet
has a FORM which has few fields. One of the field has a hyperlink which
makes a window.open() call for Onclick. This pop-up allows a user to
search for some value. The result of the search is displayed in a
SELECT box. Based on the value selected in this SELECT box, the field
in the servlet that called this pop-up gets populated. After this is
done, I close this pop-up & click on the proceed button of the FORM
(using POST) which takes us to another servlet. Then when I click on
the back button, the fields on the form which were populated are gone.

I have made the following analysis:
(i) On clicking the back button, a request is sent to the server.
(ii) It works on FireFox & not on IE
(iii) If I do not use the hyperlink to bring the pop-up, and then I
click on proceed and then back, the fields do not vanish.
(iv) I tried using http://www.ggogle.com to the call on window.open().
Does not help
(v) The very action of using pop-up by clicking on it causes this
problem

Any help or tips in this regard would be really appreciated.

Thanks in advance.

--Mahesh
Vasudhaiv Naresh
Ranch Hand

Joined: May 13, 2005
Posts: 57
IE doesn't seem to save sessions across different browser windows and Firefox does.
Regards,
Naresh
Deepak Kaimal
Greenhorn

Joined: Aug 30, 2005
Posts: 13
Naresh,
I am not sure about Mahesh's problem, but what you said about IE sessions is not true. On Windows XP each new IE instance is started in the context of a new process, and does not share non-persistent sessions with other IE windows. However, if you do a Ctrl-N or File>>New>>Window and spawn another window in the context of the current process, the sessions are shared between the two windows.
As Mahesh's popup is spawned by the current window, it should share the session with the parent window.
The issue of the session not being shared between IE processes is a matter of process isolation and it behaves differently between OS versions. This behaviour will not be seen in the Win9x family.
Mahesh Kumar Kumar
Greenhorn

Joined: Jul 14, 2005
Posts: 8
Guys,

Solved the problem,

Its counter intutive,

I put in
<META HTTP-EQUIV="pragma" CONTENT="no-cache">

in the header and it started caching it.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: Servlet Problem with Back Button on IE