org.fireflow.webdesigner.servlet.handlers.GetProcessDefsHandler.java Source code

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Here is the source code for org.fireflow.webdesigner.servlet.handlers.GetProcessDefsHandler.java

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/**
 * Copyright 2007-2010 ?
 * All rights reserved. 
 * 
 * This library is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License v3 as published by the Free Software
 * Foundation.
 *
 * 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 Lesser General Public License along
 * with this library; if not, see http://www.gnu.org/licenses/lgpl.html.
 *
 */
package org.fireflow.webdesigner.servlet.handlers;

import java.io.IOException;
import java.io.OutputStream;

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

import org.apache.commons.lang.StringEscapeUtils;
import org.fireflow.client.WorkflowSession;
import org.fireflow.client.WorkflowSessionFactory;
import org.fireflow.client.WorkflowStatement;
import org.fireflow.clientwidget.BrowserUtils;
import org.fireflow.clientwidget.servlet.ActionHandler;
import org.fireflow.clientwidget.tag.ClientWidgetBase;
import org.fireflow.engine.context.RuntimeContext;
import org.fireflow.engine.entity.repository.ProcessKey;
import org.fireflow.engine.modules.ousystem.impl.FireWorkflowSystem;
import org.fireflow.pdl.fpdl.misc.FpdlConstants;
import org.firesoa.common.util.Utils;
//import org.springframework.context.ApplicationContext;
//import org.springframework.web.context.support.WebApplicationContextUtils;

/**
 *
 * @author ? nychen2000@163.com
 * Fire Workflow www.firesoa.com  www.fireflow.org
 *
 */
public class GetProcessDefsHandler implements ActionHandler {

    /* (non-Javadoc)
     * @see org.fireflow.clientwidget.servlet.ActionHandler#handleRequest(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    public void handleRequest(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        String processId = req.getParameter("processId");
        String version = req.getParameter("processVersion");
        String processType = req.getParameter("processType");
        int v = 1;
        if (version != null && !version.trim().equals("")) {
            v = Integer.parseInt(version);
        }
        if (processType == null || processType.trim().equals("")) {
            processType = FpdlConstants.PROCESS_TYPE_FPDL20;
        }
        RuntimeContext runtimeContext = RuntimeContext.getInstance();

        FireWorkflowSystem user = FireWorkflowSystem.getInstance();
        WorkflowSession session = WorkflowSessionFactory.createWorkflowSession(runtimeContext, user);
        WorkflowStatement stmt = session.createWorkflowStatement();

        String processXml = stmt.getWorkflowProcessXml(new ProcessKey(processId, v, processType));

        if (processXml != null && !processXml.trim().equals("")) {
            if (BrowserUtils.isIE(req)) {//IExmlie?xml
                outputRawXml(processXml, resp);
            } else {//?htmlxml
                this.outputXmlWithinHtml(processXml, resp, req);
            }

        } else {
            throw new ServletException("???process key is [processId="
                    + processId + ",version=" + version + ",processType=" + processType + "]");
        }

    }

    protected void outputXmlWithinHtml(String processXml, HttpServletResponse resp, HttpServletRequest req)
            throws ServletException, IOException {
        HttpServletRequest request = req;
        String contextPath = request.getContextPath();
        if (contextPath == null)
            contextPath = "";
        if (contextPath.endsWith("/")) {
            contextPath = contextPath.substring(0, contextPath.length() - 1);
        }

        StringBuffer sbuf = new StringBuffer();
        sbuf.append("<!DOCTYPE html>\n").append("<html>\n").append("<head>\n").append("<script src=\"")
                .append(contextPath).append(ClientWidgetBase.FIREFLOW_RESOURCE_SERVLET)
                .append("/org/fireflow/webdesigner/resources/google-code-prettify/prettify.js\"></script>\n")
                .append("<link rel=\"stylesheet\" href=\"").append(contextPath)
                .append(ClientWidgetBase.FIREFLOW_RESOURCE_SERVLET)
                .append("/org/fireflow/webdesigner/resources/google-code-prettify/prettify.css\"/>\n")
                .append("<style>\n").append("body { margin: 0; padding: 0;font-size:12px }\n")
                .append("pre { margin: 0 }\n").append("</style>\n").append("</head>\n")
                .append("<body onload=\"prettyPrint();\">\n").append("<pre class=\"prettyprint lang-xml\">");

        String tmp = StringEscapeUtils.escapeXml(processXml);
        sbuf.append(tmp);

        sbuf.append("</pre>\n").append("</body>\n").append("</html>");

        // contentType
        String encoding = Utils.findXmlCharset(processXml);
        resp.setContentType("text/html");
        resp.setCharacterEncoding(encoding);

        // ???
        resp.setHeader("Pragma", "no-cache");
        resp.setHeader("Cache-Control", "no-cache");
        resp.setIntHeader("Expires", -1);

        byte[] byteArr = sbuf.toString().getBytes(encoding);

        OutputStream outStream = resp.getOutputStream();
        outStream.write(byteArr);
    }

    protected void outputRawXml(String processXml, HttpServletResponse resp) throws ServletException, IOException {
        // contentType
        String encoding = Utils.findXmlCharset(processXml);
        //      resp.setContentType("text/xml charset="+encoding);
        resp.setContentType("text/xml");
        resp.setCharacterEncoding(encoding);

        // ???
        resp.setHeader("Pragma", "no-cache");
        resp.setHeader("Cache-Control", "no-cache");
        resp.setIntHeader("Expires", -1);

        byte[] byteArr = processXml.getBytes(encoding);

        OutputStream outStream = resp.getOutputStream();
        outStream.write(byteArr);
    }

}