Matthew Hixson wrote:
> I need to be able to serve up an image to a customer based upon the branding of
> their site. For example, they should get their logo when they ask for
> logo.gif. I'm doing this by making the src attribute of the img tag point them
> to "imageServer.jsp?name=logo.gif". This way I can serve up their image
> without them being able to find out who our other customers are.
> In the code below I've tried to remove all newlines because they were getting
> inserted into the stream that goes back to the browser and causing the
> resulting file to appear as something other than a gif image. Now the problem
> is that the data which is sent to the browser is always exactly one byte larger
> than the actual file as it sits on the hard drive. If I use 'lynx -dump
> http://url/to/imageServer.jsp?name=logo.gif > /tmp/logo.gif' the file will be
> one byte larger than it is on the web server. This extra byte must be getting
> appended to the file because the browser will still display the gif correctly.
> I think that the JSP server (Resin 1.2.b2) is appending one carriage return to
> the end of the file.
> I've considered leaving it alone as it appears to be working, but that's just
> not my style.
> I realize I could write this as a servlet, but I would prefer to use a JSP.
> If anyone has any ideas on how I can tell Resin to stop sending that extra byte
> I'd really like to hear it.
> Thanks,
> -M@
>
See the JSP 1.1 spec, section 2.5.4, page 41:
"JSP page authors are prohibited from writing directly to
either the PrintWriter or OutputStream associated with
the ServletResponse".
If you want to create dynamic images like this, you need to use a servlet instead
of a JSP page.
Craig McClanahan
====================
See you at ApacheCon Europe <http://www.apachecon.com>!
Session VS01 (23-Oct 13h00-17h00): Sun Technical Briefing
Session T06 (24-Oct 14h00-15h00): Migrating Apache JServ
Applications to Tomcat
===========================================================================
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST".
Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
