/*
* JBoss, a division of Red Hat
* Copyright 2012, Red Hat Middleware, LLC, and individual
* contributors as indicated by the @authors tag. See the
* copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.gatein.sso.integration;
import org.exoplatform.container.web.AbstractFilter;
import org.gatein.common.logging.Logger;
import org.gatein.common.logging.LoggerFactory;
import org.gatein.sso.agent.filter.api.SSOInterceptor;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
/**
* Filter will delegate to SSO interceptors
*
* @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
*/
public class SSODelegateFilter extends AbstractFilter
{
private volatile Map<SSOInterceptor, String> ssoInterceptors;
private static final Logger log = LoggerFactory.getLogger(SSODelegateFilter.class);
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
if (SSOUtils.isSSOEnabled())
{
SSOFilterChain ssoChain = new SSOFilterChain(chain, getInterceptors(), this);
ssoChain.doFilter(request, response);
}
else
{
chain.doFilter(request, response);
}
}
private Map<SSOInterceptor, String> getInterceptors()
{
if (ssoInterceptors == null)
{
synchronized (this)
{
if (ssoInterceptors == null)
{
SSOFilterIntegrator ssoFilterIntegrator = (SSOFilterIntegrator)getContainer().getComponentInstanceOfType(SSOFilterIntegrator.class);
ssoInterceptors = ssoFilterIntegrator.getSSOInterceptors();
log.info("Initialized SSO integrator with interceptors: " + ssoInterceptors);
}
}
}
return ssoInterceptors;
}
public void destroy()
{
}
public static class SSOFilterChain implements FilterChain
{
private final FilterChain containerChain;
private final Iterator<Map.Entry<SSOInterceptor, String>> iterator;
private final SSODelegateFilter ssoDelegateFilter;
public SSOFilterChain(FilterChain containerChain, Map<SSOInterceptor, String> interceptors, SSODelegateFilter ssoDelegateFilter)
{
this.containerChain = containerChain;
this.iterator = interceptors.entrySet().iterator();
this.ssoDelegateFilter = ssoDelegateFilter;
}
public void doFilter(ServletRequest request, ServletResponse response) throws IOException, ServletException
{
while (iterator.hasNext())
{
Map.Entry<SSOInterceptor, String> current = iterator.next();
HttpServletRequest hRequest = (HttpServletRequest) request;
if (log.isTraceEnabled())
{
log.trace("Trying mapping " + current.getValue() + " of SSO interceptor " + current.getKey()
+ ". Request URI is " + hRequest.getRequestURI());
}
if (ssoDelegateFilter.isMappedTo(current.getValue(), hRequest.getServletPath()))
{
SSOInterceptor interceptor = current.getKey();
if (log.isTraceEnabled())
{
log.trace("Going to invoke SSO interceptor " + interceptor);
}
interceptor.doFilter(request, response, this);
return;
}
}
if (log.isTraceEnabled())
{
log.trace("No more SSO interceptors. Going to invoke container filter chain " + containerChain);
}
containerChain.doFilter(request, response);
return;
}
}
// Primitive impl, but seems to be sufficient for our purposes. Could be overriden if needed
protected boolean isMappedTo(String filterMapping, String contextPath)
{
if ("/*".equals(filterMapping))
{
return true;
}
else if (contextPath.startsWith(filterMapping))
{
return true;
}
return false;
}
}