option in jboss to force all to insert pragma headers

[geraldj]

I could be wrong but some time last year when browsing through out the Jboss site I found a document which showed me how Jboss could insert headers in the JSP as to stop browser caching. At the time I did not use it because I already inserted these headers into my JSP's and now when we are in the process of releasing a much larger project these feature would be very useful.

I've looked throught out the whole site to see if I could find that document again but to no avail. Was I dreaming ?? Do I have to go back to the code to insert these lines again ?? Can some one tell if if this does really exist and if so where ??

Gerald :>

[starksm64]

A simple filter comes to mind:

package filter;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Enumeration;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

/** A servlet filter that simply adds all header specified in its config
to replies the filter is mapped to. An example would be to set the cache
 control max age:

 <filter>
 <filter-name>CacheControlFilter</filter-name>
 <filter-class>filter.ReplyHeaderFilter</filter-class>
 <init-param>
 <param-name>Cache-Control</param-name>
 <param-value>max-age=3600</param-value>
 </init-param>
 </filter>

 <filter-mapping>
 <filter-name>CacheControlFilter</filter-name>
 <url-pattern>/images/*</url-pattern>
 </filter-mapping>
 <filter-mapping>
 <filter-name>CacheControlFilter</filter-name>
 <url-pattern>*.js</url-pattern>
 </filter-mapping>


 @author [e-mail]
 @version $Revison:$
 */
public class ReplyHeaderFilter implements Filter
{
 String[][] replyHeaders = {{}};

 public void init(FilterConfig config)
 {
 Enumeration names = config.getInitParameterNames();
 ArrayList tmp = new ArrayList();
 while( names.hasMoreElements() )
 {
 String name = (String) names.nextElement();
 String value = config.getInitParameter(name);
 String[] pair = {name, value};
 tmp.add(pair);
 }
 replyHeaders = new String[tmp.size()][2];
 tmp.toArray(replyHeaders);
 }

 public void doFilter(ServletRequest request, ServletResponse response,
 FilterChain chain)
 throws IOException, ServletException
 {
 // Apply the headers
 HttpServletResponse httpResponse = (HttpServletResponse) response;
 for(int n = 0; n < replyHeaders.length; n ++)
 {
 String name = replyHeaders[n][0];
 String value = replyHeaders[n][1];
 httpResponse.addHeader(name, value);
 }
 chain.doFilter(request, response);
 }

 public void destroy()
 {
 }
}

[geraldj]

Thanks for the filter and will give it a go. Just out of curiosity was there ever a feature in previous releases of Jboss that did this ???

Gerald :>