This is from the Microsoft support site. It gives an explanation of two
caching problems. They reference IE 4 but you might try the suggestions
anyway.
<http://support.microsoft.com/support/kb/articles/Q222/0/64.ASP>
and
<http://support.microsoft.com/support/kb/articles/Q234/2/47.ASP>
This is the supposed mechanism to prevent caching in IE
<http://support.microsoft.com/support/kb/articles/Q234/0/67.ASP>
This is what we do, it seems to work fairly well:
response.setHeader( "Pragma", "No-cache" );
response.setDateHeader( "Expires", 0 );
response.setHeader( "Cache-Control", "no-cache" );
We do this on every page. Another thing that we've tried to vary the query
string by putting some junk in the query string for a URL. This should look
like a new request to the client.
HttpQueryString.addStringArgument(url, "j=" + (int)(Math.random()*1000));
Finally, something someone else posted that we haven't tried:
>From: Sam Heisz [[EMAIL PROTECTED]]
>Subject: Perhaps you should use: Cache-control: private
>...
>response.addHeader("Cache-Control","private");
>
>See RFC 2068 Section 14.9 for information on the Cache-Control HTTP Header.
><URL:http://www.ietf.org/rfc/rfc2068.txt?number=2068>
>...
This solution is also suggested by the following Microsoft URL:
<http://support.microsoft.com/support/kb/articles/Q189/4/09.ASP>
I'm afraid that even all of this won't always solve your problem. We
recommend that users switch their internet settings on IE to "Check for
newer versions of stored pages: every visit to the page".
-----Original Message-----
From: Lisa Lewis [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 06, 2000 10:44 AM
To: [EMAIL PROTECTED]
Subject: IE5 caching of JSP pages, ( using JRUN )
I am having trouble preventing IE from caching my JSP pages. I have
wasted an entire day on this. I have read and tried every relevant post.
Below is a snippet of my code from one of my JSP pages that I would like the
browser NOT to cache! I am adding the meta tags in both HTML and the JSP
response headers. I tried various combinations of this. I have also tried
to check the 'Set no-cache header on responses' checkbox in the JRUN
administration tool. This doesn't seem to work either. I have also tried
adding <meta http-equiv="Expires" content="0"> to the bottom of the JSP
page.
Someone had posted this suggestion as a way to get around a bug in IE5. I
have not had any luck getting any of these solutions to work.
Note: When I set the response headers, the page doesn't show up in the
history
but it still caches the page because the next time I hit a button to bring
up
the new page, it retrieves the old one. I am using Javascript:
parent.location=
"/servlet/GuiControllerServlet?actiontotake=displaypatientlistsplitframeset"
;
...when the button is clicked.
Any advice/suggestions will be greatly appreciated!
Thanks,
Lisa
code snippet:
<%
// Try to prevent browsers from caching page!!
response.setHeader("Pragma","no-cache"); // HTTP 1.0
response.setDateHeader("Expires",0); //prevents caching at proxy server
response.setHeader("Cache-Control", "no-cache");
//response.setHeader("Cache-Control", "no-store"); // HTTP 1.1
%>
<html>
<head>
<meta http-equiv="Expires" content="0">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="Cache-Control" content="no-store">
</head>
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