redirectaction.java

这是linux下ssl vpn的实现程序

/*
 *  SSL-Explorer
 *
 *  Copyright (C) 2003-2006 3SP LTD. 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; either version 2 of
 *  the License, or (at your option) any later version.
 *  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 com.sslexplorer.navigation.actions;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.sslexplorer.core.actions.DefaultAction;
import com.sslexplorer.navigation.forms.RedirectForm;
import com.sslexplorer.security.Constants;
import com.sslexplorer.security.SessionInfo;


/**
 * Simple action that is used to perform visible redirects (i.e. a page is
 * displayed to the user saying "You will be redirected to ..." or similar).
 * <p>
 * A meta refresh is used to perform
 * 
 * @author Brett Smith <a href="mailto:[e-mail]">&lt;[e-mail]&gt;</a>
 * @version $Revision: 1.2 $
 */
public class RedirectAction extends DefaultAction {


    /* (non-Javadoc)
     * @see org.apache.struts.action.Action#execute(org.apache.struts.action.ActionMapping, org.apache.struts.action.ActionForm, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
                    throws Exception {
        super.execute(mapping, form, request, response);
        String forwardTo = (String)request.getAttribute(Constants.REQ_ATTR_FORWARD_TO); 
        if(forwardTo == null) {
            forwardTo = request.getParameter("forwardTo");
            if(forwardTo == null) {
                throw new Exception("No forwardTo parameter provided.");
            }
        }
        String folder = (String)request.getAttribute(Constants.REQ_ATTR_FOLDER); 
        if(folder == null) {
            folder = request.getParameter("folder");
        }
        String target = (String)request.getAttribute(Constants.REQ_ATTR_TARGET); 
        if(target == null) {
            target = request.getParameter("target");
        }
        ((RedirectForm)form).init(forwardTo, folder, target);
        return mapping.findForward("display");
    }

    /* (non-Javadoc)
     * @see com.sslexplorer.core.actions.CoreAction#getNavigationContext(org.apache.struts.action.ActionMapping, org.apache.struts.action.ActionForm, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    public int getNavigationContext(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) {
        return SessionInfo.ALL_CONTEXTS;
    }

}