ResponseHeaderFilter.java

package gcom.gui.util;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;

public class ResponseHeaderFilter implements Filter {
	FilterConfig fc;

	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		
		HttpServletResponse response = (HttpServletResponse) res;
		
		// set the provided HTTP response parameters
		for (Enumeration e = fc.getInitParameterNames(); e.hasMoreElements();) {
			String headerName = (String) e.nextElement();
			response.addHeader(headerName, fc.getInitParameter(headerName));
		}
		
		// pass the request/response on
		chain.doFilter(req, response);
		
	}

	public void init(FilterConfig filterConfig) {
		this.fc = filterConfig;
	}

	public void destroy() {
		this.fc = null;
	}
}