com.adito.extensions.actions.GetExtensionDescriptorAction.java Source code

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Here is the source code for com.adito.extensions.actions.GetExtensionDescriptorAction.java

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/*
*  Adito
*
*  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.adito.extensions.actions;

import java.io.IOException;
import java.util.Enumeration;
import java.util.Properties;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.jdom.JDOMException;

import com.adito.core.CoreException;
import com.adito.core.actions.XMLOutputAction;
import com.adito.extensions.ExtensionDescriptor;
import com.adito.extensions.ExtensionException;
import com.adito.extensions.ExtensionParser;
import com.adito.extensions.store.ExtensionStore;
import com.adito.security.Constants;
import com.adito.security.LogonControllerFactory;
import com.adito.security.SessionInfo;

/**
 * Retrieve an application extensions descriptor.
 */
public class GetExtensionDescriptorAction extends XMLOutputAction {

    final static Log log = LogFactory.getLog(GetExtensionDescriptorAction.class);

    /*
     * (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 {

        request.setAttribute(Constants.REQ_ATTR_COMPRESS, Boolean.FALSE);
        String ticket = request.getParameter("ticket");
        String id = request.getParameter("id");
        if (id == null) {
            throw new Exception("No id");
        }
        ExtensionDescriptor app = ExtensionStore.getInstance().getExtensionDescriptor(id);
        if (app == null) {
            throw new Exception("No extension with id of " + id);
        }
        Properties properties = new Properties();
        for (Enumeration e = request.getParameterNames(); e.hasMoreElements();) {
            String name = (String) e.nextElement();
            String val = request.getParameter(name);
            if (name.equals("ticket") || name.equals("id") || name.equals("name")) {
                continue;
            } else {
                properties.put(name, val);
            }
        }
        processApplicationRequest(app, ticket, request, response, properties);
        return null;
    }

    protected void processApplicationRequest(ExtensionDescriptor app, String ticket, HttpServletRequest request,
            HttpServletResponse response, Properties properties) throws JDOMException, Exception {
        try {
            SessionInfo session = LogonControllerFactory.getInstance().getSessionInfo(request);
            if (session == null) {
                throw new ExtensionException(ExtensionException.INTERNAL_ERROR, "No session.");
            }
            sendApplicationDescriptor(app, request, response, session, properties);

        } catch (CoreException coreException) {
            String message = coreException.getLocalizedMessage(request.getSession());
            log.error(message, coreException);
            sendError(message, response);
        } catch (Throwable t) {
            log.error("Failed to process request for application.", t);
            sendError(t.getLocalizedMessage() == null ? "<null>" : t.getLocalizedMessage(), response);
        }
    }

    private void sendApplicationDescriptor(ExtensionDescriptor app, HttpServletRequest request,
            HttpServletResponse response, SessionInfo session, Properties properties)
            throws JDOMException, IOException, UndefinedParameterException, CoreException {
        response.setHeader("Content-type", "text/xml");
        byte[] xml = ExtensionParser.processAgentParameters(app, request, session, properties).getBytes();
        //      response.setContentLength(xml.length);
        response.getOutputStream().write(xml);
        response.getOutputStream().close();
    }

}