/**
* Copyright (c) 2005-2007, Paul Tuckey
* All rights reserved.
* ====================================================================
* Licensed under the BSD License. Text as follows.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* - Neither the name tuckey.org nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*/
package org.mobicents.tools.http.urlrewriting;
import org.apache.log4j.Logger;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.mobicents.tools.sip.balancer.BalancerRunner;
import org.tuckey.web.filters.urlrewrite.Conf;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
/**
*
* @author Paul Tuckey
* @author Konstantin Nosach (kostyantyn.nosach@telestax.com)
*/
public class BalancerUrlRewriteFilter {
private static final Logger log = Logger.getLogger(BalancerUrlRewriteFilter.class.getCanonicalName());
private BalancerUrlRewriter urlRewriter = null;
public void init(BalancerRunner balancerRunner) throws ServletException
{
log.info("filter init called");
Conf conf = new BalancerConf(balancerRunner.getConfiguration().getHttpConfiguration().getUrlrewriteRule());
checkConfLocal(conf);
}
private void checkConfLocal(Conf conf) {
if (log.isDebugEnabled()) {
if (conf.getRules() != null) {
log.debug("inited with " + conf.getRules().size() + " rules");
}
log.debug("conf is " + (conf.isOk() ? "ok" : "NOT ok"));
}
if (conf.isOk() && conf.isEngineEnabled()) {
urlRewriter = new BalancerUrlRewriter(conf);
log.info("loaded (conf ok)");
} else {
if (!conf.isOk()) {
log.error("Conffailed to load");
}
if (!conf.isEngineEnabled()) {
log.error("Engine explicitly disabled in conf"); // not really an error but we want ot to show in logs
}
if (urlRewriter != null) {
log.error("unloading existing conf");
urlRewriter = null;
}
}
}
/**
* The main method called for each request that this filter is mapped for.
*
* @param request the request to filter
* @throws IOException
* @throws ServletException
*/
public void doFilter(final HttpRequest httpRequest, MessageEvent e) throws IOException, ServletException {
HttpServletRequest servletRequest = new NettyHttpServletRequestAdaptor(httpRequest, e.getChannel());
final HttpServletRequest hsRequest = (HttpServletRequest) servletRequest;
if (urlRewriter != null) {
String newUrl = urlRewriter.processRequest(hsRequest);
if(!newUrl.equals(httpRequest.getUri()))
{
if (log.isDebugEnabled())
log.debug("request rewrited from : [" + httpRequest.getUri() + "] to : ["+newUrl+"]");
httpRequest.setUri(newUrl);
}
else
{
if (log.isDebugEnabled())
log.debug("request not rewrited : [" + httpRequest.getUri() + "]");
}
} else {
if (log.isDebugEnabled()) {
log.debug("urlRewriter engine not loaded ignoring request (could be a conf file problem)");
}
}
}
}