HeaderDumperFilter.java

/*
 * RHQ Management Platform
 * Copyright (C) 2005-2012 Red Hat, Inc.
 * All rights reserved.
 *
 * This program 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 version 2 of the License.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

package org.rhq.enterprise.rest;

import java.io.IOException;
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.HttpServletRequest;

/**
 * Simple servlet filter to dump http headers
 * @author Heiko W. Rupp
 */
public class HeaderDumperFilter implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp,
                         FilterChain chain) throws ServletException, IOException {

        HttpServletRequest req1 = (HttpServletRequest) req;
        String requestedType = req1.getHeader("accept");
        System.out.println(" RT: " + requestedType);
        Enumeration headers = req1.getHeaderNames();
        while (headers.hasMoreElements()) {
            String elem = (String) headers.nextElement();
            String val = req1.getHeader(elem);
            System.out.println("  H " + elem + "=" + val);
        }

        chain.doFilter(req, resp);
    }

    public void init(FilterConfig config) throws ServletException {

    }

}