Hi, There are filters that ship with Tomcat's example webapp. Beside being the best how-to possible, there's actually one that does what you want for character encoding, so it's a trivial copy/paste to suit it to whatever headers you need.
Yoav Shapira http://www.yoavshapira.com >-----Original Message----- >From: Steven J.Owens [mailto:[EMAIL PROTECTED] >Sent: Wednesday, October 20, 2004 10:10 PM >To: Tomcat Users List >Subject: Re: adding HTTP headers for all responses in web application > >On Wed, Oct 20, 2004 at 11:07:58AM -0400, Ben Souther wrote: >> Search the archives, I believe Tim Funk has actually written and >> published one.... Not sure though. > > It's pretty straight-forward. This is the first filter I ever >coded, it was a snap. I make no guarantees that the particular >headers are exactly what you need (browser caching is annoyingly >difficult to disable). > >-config---------------------------------------------------------------- ---- >- > <filter> > <filter-name>NoCacheFilter</filter-name> > <filter-class>class.path.to.NoCacheFilter</filter-class> > </filter> > <filter-mapping> > <filter-name>NoCacheFilter</filter-name> > <url-pattern>/*</url-pattern> > </filter-mapping> >-source---------------------------------------------------------------- ---- >- >import javax.servlet.Filter; >import javax.servlet.FilterChain; >import javax.servlet.FilterConfig; >import javax.servlet.ServletRequest; >import javax.servlet.ServletResponse; >import javax.servlet.http.HttpServletResponse; >import javax.servlet.http.HttpServletRequest; >import java.io.IOException; >import javax.servlet.ServletException; > >public class NoCacheFilter implements Filter { > > public void init(FilterConfig config) throws ServletException { > this.filterConfig = config; > } > private FilterConfig filterConfig; > public FilterConfig getFilterConfig() { > return this.filterConfig; > } > public void setFilterConfig (FilterConfig filterConfig) { > this.filterConfig = filterConfig; > } > public void destroy() { > this.filterConfig = null; > } > > public void doFilter (ServletRequest request, > ServletResponse response, > FilterChain chain) { > try { > if (response instanceof HttpServletResponse) { > HttpServletResponse httpresponse = >(HttpServletResponse)response ; > // Set the Cache-Control and Expires header > httpresponse.setHeader("Cache-Control", "no-cache") ; > httpresponse.setHeader("Expires", "0") ; > } > chain.doFilter (request, response); > } catch (IOException e) { > System.out.println ("IOException in NoCacheFilter"); > e.printStackTrace() ; > } catch (ServletException e) { > System.out.println ("ServletException in NoCacheFilter"); > e.printStackTrace() ; > } > } >} >---------------------------------------------------------------------- > >-- >Steven J. Owens >[EMAIL PROTECTED] > >"I'm going to make broad, sweeping generalizations and strong, > declarative statements, because otherwise I'll be here all night and > this document will be four times longer and much less fun to read. > Take it all with a grain of salt." - http://darksleep.com/notablog > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [EMAIL PROTECTED] >For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
