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/*
This file is part of Subsonic.
Subsonic is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Subsonic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
Copyright 2009 (C) Sindre Mehus
*/
package net.sourceforge.subsonic.filter;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
/**
* Configurable filter for setting HTTP response headers. Can be used, for instance, to
* set cache control directives for certain resources.
*
* @author Sindre Mehus
* @version $Revision: 1.1 $ $Date: 2005/08/14 13:14:47 $
*/
public class ResponseHeaderFilter implements Filter {
private FilterConfig filterConfig;
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
// Sets the provided HTTP response parameters
for (Enumeration e = filterConfig.getInitParameterNames(); e.hasMoreElements();) {
String headerName = (String) e.nextElement();
response.addHeader(headerName, filterConfig.getInitParameter(headerName));
}
// pass the request/response on
chain.doFilter(req, response);
}
public void init(FilterConfig filterConfig) {
this.filterConfig = filterConfig;
}
public void destroy() {
this.filterConfig = null;
}
}
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