On Friday 15 November 2002 12:54, Bill Angel wrote:
> Hello:
>
> I recently installed ApacheTomcat 4.1.12-LE-jdk14. The installation appears
> to function correctly, but I am experiencing difficulties getting browsers
> (IE 5.5 and Netscape 7.0) to recognize the "cache-control " directives
> specific to the http/1.1 protocol. I am utilizing a Servlet to send back a
> Response as follows:
>
> if(fileName == null) {
>
> PrintWriter out = new PrintWriter (response.getOutputStream());
> response.reset();
> response.setHeader("Pragma","no-cache");
> response.setHeader("Cache-Control","no-cache");
> response.setHeader("Cache-Control","no-store");
> response.setHeader("Cache-Control","must-revalidate");
> response.setDateHeader("Expires",-1);
Make this: response.setHeader("Expires", 1);
The time is the total number of seconds since Epoch ("Jan 1 1970 00:00:00");
> response.setContentType("text/html");
You're not generating a valid HTML page, so change:
response.setContentType("text/plain");
> out.println("file not specified!");
> out.close();
> return;
> }
<cut>
> Is it possible to detect within the Servlet code whether the connection
> that was established is utilizing http/1.0 or http/1.1?
Yes, use: request.getProtocol().
<cut>
> For security reasons, I want to be able to
> instruct the user's Browser, and any intermediate Proxy Servers,
> NOT to cache documents being sent back to the user during his session. via
> the http/1.1 "Cache-Control" Header functionality.
You can't, this is out of you're controll. A well behaved browser should
honour your request to not cache this page, but you have no way of enforcing
it.
> Also, is it possible to configure Tomcat to not drop back to using
> http/1.0, when a connection utilizing http/1.1 cannot be established?
AFAIK this happens automagically.
> Thanks
>
> Bill Angel
> Computer Scientist
> Silver Spring, Maryland
> [EMAIL PROTECTED]
Regards,
Cees.
--
To unsubscribe, e-mail: <mailto:tomcat-user-unsubscribe@;jakarta.apache.org>
For additional commands, e-mail: <mailto:tomcat-user-help@;jakarta.apache.org>
