Sorry to your all.. Tomcat does do correct caching..
The way that firebug displays this is a bit strange..
My fault
[EMAIL PROTECTED] schreef:
Well we are talking about static js files that do not change often.
If was thinking about writing my own filter that created the
correect header fields... But i think it is really a responsibility of
the
application server to support client caching for static files..
It looks like tomcat does not do that.. at least not for javasdcript
files..
Or the firebug firefox util is f*cked up...
I will investigate this case.. because i think Tomcat DOES support
cahcing ( at least if i look at the code of DefaultServlet that handles
the static files in tomcat )..
But strangely enough it does not work for me..
Johnny Kewl schreef:
I just had an after thought... happens often ; )
I think because you using feed type technology the assumption is that
is wot you really want,
but if this js file never changes... then wot about trying normal
caching constructs like
please check the actual format...
Cache-control: public, max-age=3600
I think that will cache the js page for one hour.... alot easier than
hashing pages and all the other fancy stuff in feeds.... maybe.
----- Original Message ----- From: "Johnny Kewl" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Tuesday, May 22, 2007 3:55 PM
Subject: Re: Tomcat and Static file Caching ( 304 headers )
Hi... I dont know much about this, never had a chance to play with
it... dont even
know how much Tomcat does for you and how much is manual header
manipulation.
But just from below... there seems to be nothing in the browser
response telling the server
that it understands feed caching... ie one would expect to see
Last-Modified: or Etag... so just guessing but I dont think the
browser understands it..
maybe you should try Last-Modified....
I found a fairly decent article.... maybe will help...
http://rakaz.nl/item/reducing_the_bandwidth_used_by_feeds
----- Original Message ----- From: "[EMAIL PROTECTED]"
<[EMAIL PROTECTED]>
To: <users@tomcat.apache.org>
Sent: Tuesday, May 22, 2007 2:17 PM
Subject: Tomcat and Static file Caching ( 304 headers )
I am using Tomcat 5.5 together with Eclipse 3.2.2 for development
of a web application.
But when i use FireBug in Firefox to track network traffic is
see that tomcat never returns a 304 NOT MODIFIED header
if a file is requested twice.
For example when requesting a JavaScript file:
http://localhost:8080/XDataSystem/standard/js/standard.js
you see the following headers:
*Response Headers*
Server Apache-Coyote/1.1
Etag W/"10823-1179768573406"
Last-Modified Mon, 21 May 2007 17:29:33 GMT
Content-Type text/javascript
Content-Encoding gzip
Vary Accept-Encoding
Date Tue, 22 May 2007 11:52:27 GMT
*Request Headers*
Host localhost:8080
User-Agent Mozilla/5.0 (Windows; U; Windows NT 5.1; nl; rv:1.8.1.3)
Gecko/20070309 Firefox/2.0.0.3
Accept */*
Accept-Language nl,en-us;q=0.7,en;q=0.3
Accept-Encoding gzip,deflate
Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive 300
Connection keep-alive
Referer http://localhost:8080/XDataSystem/rainbow/home.page
As you can see in the response filter i have turned GZIP
compressoin on.
But when i request the page again ( by typing the url in the url-bar,
NOT using F5 )
I get the exact same response back.. But i expect a 304 response.
I think it has something to do with the Vary response field.
I have read this:
http://localhost:8080/XDataSystem/standard/js/standard.js
But i do not understand it fully.
can anybody help me??
This really makes my application ( using dojo ) slow.
Thanks in advance.
Tjerk Wolterink
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