James Stauffer
From: James Stauffer [mailto:[EMAIL PROTECTED]
Sent: Friday, September 12, 2003 10:17 AM
To: jdjlist
Subject: [jdjlist] Re: Browser Caching JSPs
Would the java be the following?
response.setHeader("Cache-control", "max-age=31536000");
James Stauffer
-----Original Message-----
From: Spencer
W. Thomas [mailto:[EMAIL PROTECTED]]
Sent: Friday, September 12, 2003 9:36 AM
To:
jdjlist
Subject: [jdjlist] Re: Browser Caching
JSPs
You need to set the Expires header in the HTTP response or a
Cache-control header with the max-age directive.
The HTTP/1.1 spec,
ftp://ftp.isi.edu/in-notes/rfc2616.txt,
describes these headers.
Expires is section 14.21,
the content of the header is a date in "RFC
1123" date
format, e.g. Thu, 01 Dec 1994 16:00:00 GMT. If it is not in
exactly this format, the browser is supposed to ignore
it. Section
14.21 goes on to say
To mark a response as "never expires," an origin
server sends an
Expires date approximately
one year from the time the response is
sent. HTTP/1.1 servers SHOULD NOT send Expires dates more than one
year in the future.
The Cache-control/max-age directive is probably easier because
you don't
have to do any date computations. You
just specify how long you want
the cache to hold the
page in seconds. Cache-control (section 14.9)
header for this case looks like:
Cache-control: max-age=31536000
In straight Java:
response.setHeader("Cache-control", "31536000");
=S
James Stauffer wrote:
> How can I allow the browser to cache URLs (using JSPs and
servlets)?
> i.e. View.jsp can be cached per
parameter.
> /service/WebForms/View.jsp?docuID=25948
should never change.
>
>
James Stauffer
>
>
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