If it is 304 and not 404. You can implement the lastModified method on your Servlet and always return 0 or -1 (see the javadocs).

Ronald.

On Wed, 16 Dec 2009 15:47:33 +0100, Looijmans, Mike <mike.looijm...@oce.com> wrote:

I assume you mean 304 (Not modified) instead of 404 (Not found).

Simplest I can think of is to NOT put the "last-modified" header in your
response. Then the browser
won't send you an if-modified-since back.

On the other hand, if you can put a datestamp on the response - e.g. a
file date or by reading it from a DB or so - provide the proper response
and you get client-side caching for (almost) free, which can seriously
reduce load on a server.

M.

-----Original Message-----
From: Abid Hussain [mailto:abid.huss...@dilax.com]
Sent: woensdag 16 december 2009 14:11
To: users
Subject: Ignore http header if-modified-since

Hallo,

when processing ajax-requests Tomcat sometimes responds with
a 404 instead of delivering XML.

This seems to happen when the http header "if-modified-since"
in the request doesn't somehow contain "the right" value. At
least, if the request doesn't contain this header, tomcat
responds "correctly".

Is it possible to instruct tomcat to simply ignore this
header so that the correct response will be delivered,
whatever is contained in this header?

Best regards,

Abid

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