FedoraOpenIdPhaseListener.java

/*
 * Copyright 2010, Red Hat, Inc. and individual contributors
 * as indicated by the @author tags. See the copyright.txt file 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.zanata.security;


import java.io.IOException;
import java.io.PrintWriter;

import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.servlet.http.HttpServletResponse;

import org.jboss.seam.Component;
import org.jboss.seam.navigation.Pages;
import org.jboss.seam.log.*;

public class FedoraOpenIdPhaseListener implements PhaseListener
{
   private static final long serialVersionUID = 1L;
   private transient LogProvider log = Logging.getLogProvider(FedoraOpenIdPhaseListener.class);

   public void beforePhase(PhaseEvent event)
   {
      String viewId = Pages.getCurrentViewId();

      if (viewId == null || !viewId.startsWith("/openid."))
      {
         return;
      }

      FedoraOpenId open = (FedoraOpenId) Component.getInstance(FedoraOpenId.class);
      if (open.getId() == null)
      {
         try
         {
            sendXRDS();
         }
         catch (IOException e)
         {
            log.warn(e, e);
         }
         return;
      }

      FedoraOpenId openid = (FedoraOpenId) Component.getInstance(FedoraOpenId.class);

      openid.verify();

      Pages.handleOutcome(event.getFacesContext(), null, "/openid.xhtml");
   }

   public void sendXRDS() throws IOException
   {
      FacesContext context = FacesContext.getCurrentInstance();
      ExternalContext extContext = context.getExternalContext();
      HttpServletResponse response = (HttpServletResponse) extContext.getResponse();

      response.setContentType("application/xrds+xml");
      PrintWriter out = response.getWriter();

      // XXX ENCODE THE URL!
      FedoraOpenId open = (FedoraOpenId) Component.getInstance(FedoraOpenId.class);

      out.println("<XRDS xmlns=\"xri://$xrd*($v*2.0)\"><XRD><Service>" + "<Type>http://specs.openid.net/auth/2.0/return_to</Type><URI>" + open.returnToUrl() + "</URI></Service></XRD></XRDS>");

      context.responseComplete();
   }

   public void afterPhase(PhaseEvent event)
   {
   }

   public PhaseId getPhaseId()
   {
      return PhaseId.RENDER_RESPONSE;
   }
}