launchvpnclientaction.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.agent.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.boot.Util;
import com.sslexplorer.core.CoreServlet;
import com.sslexplorer.core.CoreUtil;
import com.sslexplorer.core.actions.AuthenticatedAction;
import com.sslexplorer.policyframework.NoPermissionException;
import com.sslexplorer.policyframework.PolicyConstants;
import com.sslexplorer.policyframework.PolicyUtil;
import com.sslexplorer.security.Constants;
import com.sslexplorer.security.SessionInfo;
import com.sslexplorer.security.VPNSession;

/**
 * Action to launch the VPN client. If the VPN client is already running, the
 * user will just be directed to the home page.
 * 
 * @author Brett Smith <a href="mailto: [e-mail]">&lt;[e-mail]&gt;</a>
 * @version $Revision: 1.2 $
 */

public class LaunchVPNClientAction extends AuthenticatedAction {

    /**
     * Constructor
     */
    public LaunchVPNClientAction() {
        super();
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.sslexplorer.core.actions.AuthenticatedAction#onExecute(org.apache.struts.action.ActionMapping,
     *      org.apache.struts.action.ActionForm,
     *      javax.servlet.http.HttpServletRequest,
     *      javax.servlet.http.HttpServletResponse)
     */
    protected ActionForward onExecute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
                    HttpServletResponse response) throws Exception {

        try {
            PolicyUtil.checkPermission(PolicyConstants.VPN_CLIENT_RESOURCE_TYPE, PolicyConstants.PERM_USE, request);
        } catch (NoPermissionException e) {
            throw new NoPermissionException("Contact your administrator to gain vpn access.", e, CoreServlet.getServlet()
                            .getLogonController().getUser(request), PolicyConstants.VPN_CLIENT_RESOURCE_TYPE);
        }

        VPNSession session = CoreServlet.getServlet().getLogonController().getPrimaryVPNSession(
                        CoreServlet.getServlet().getLogonController().getVPNSessionsByLogon(request));

        if (session == null) {
            String ref = request.getParameter("returnTo");
            if (ref == null) {
                ref = (String) request.getAttribute(Constants.REQ_ATTR_LAUNCH_VPN_CLIENT_REFERER);
                if (ref == null) {
                    ref = CoreUtil.getReferer(request);
                    ref = ref == null ? "/showHome.do" : ref;
                }
            } else {
                ref = Util.urlDecode(ref);
            }
            request.setAttribute(Constants.REQ_ATTR_LAUNCH_VPN_CLIENT_REFERER, ref);
            Util.noCache(response);
            return mapping.findForward("success");
        } else {
            return mapping.findForward("homeRedirect");
        }

    }

    /*
     * (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.MANAGEMENT_CONSOLE_CONTEXT | SessionInfo.USER_CONSOLE_CONTEXT;
    }

}