Package org.jahia.services.render.filter

Source Code of org.jahia.services.render.filter.TemplateScriptFilter

/**
* This file is part of Jahia, next-generation open source CMS:
* Jahia's next-generation, open source CMS stems from a widely acknowledged vision
* of enterprise application convergence - web, search, document, social and portal -
* unified by the simplicity of web content management.
*
* For more information, please visit http://www.jahia.com.
*
* Copyright (C) 2002-2011 Jahia Solutions Group SA. 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* As a special exception to the terms and conditions of version 2.0 of
* the GPL (or any later version), you may redistribute this Program in connection
* with Free/Libre and Open Source Software ("FLOSS") applications as described
* in Jahia's FLOSS exception. You should have received a copy of the text
* describing the FLOSS exception, and it is also available here:
* http://www.jahia.com/license
*
* Commercial and Supported Versions of the program (dual licensing):
* alternatively, commercial and supported versions of the program may be used
* in accordance with the terms and conditions contained in a separate
* written agreement between you and Jahia Solutions Group SA.
*
* If you are unsure which license is appropriate for your use,
* please contact the sales department at sales@jahia.com.
*/

package org.jahia.services.render.filter;

import org.jahia.services.render.Template;
import org.slf4j.Logger;
import org.jahia.services.render.RenderContext;
import org.jahia.services.render.RenderException;
import org.jahia.services.render.Resource;
import org.jahia.services.render.scripting.Script;
import org.jahia.settings.SettingsBean;
import org.slf4j.profiler.Profiler;

import javax.servlet.http.HttpServletRequest;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Date;

/**
* TemplateScriptFilter
* <p/>
* Execute the template script associated to the current resource.
* <p/>
* This is a final filter, subsequent filters will not be chained.
*/
public class TemplateScriptFilter extends AbstractFilter {

    private static Logger logger = org.slf4j.LoggerFactory.getLogger(TemplateScriptFilter.class);

    public String prepare(RenderContext renderContext, Resource resource, RenderChain chain) throws Exception {
        Profiler profiler = (Profiler) renderContext.getRequest().getAttribute("profiler");
        if (profiler != null) {
            profiler.start("render template " + resource.getResolvedTemplate());
        }

        HttpServletRequest request = renderContext.getRequest();
        Script script = (Script) request.getAttribute("script");
        renderContext.getResourcesStack().push(resource);
        StringBuffer output = new StringBuffer();
        try {
            if (logger.isDebugEnabled()) {
                logger.debug("Render " + script.getView().getPath() + " for resource: " + resource);
                if(renderContext.getRequest().getAttribute("previousTemplate")!=null) {
                    logger.debug("previousTemplate object for rendering before script: "+((Template) renderContext.getRequest().getAttribute("previousTemplate")).serialize());
                } else {
                    logger.debug("previousTemplate object for rendering before script is null.");
                }
                if(renderContext.getRequest().getAttribute("usedTemplate")!=null) {
                    logger.debug("usedTemplate object for rendering before script: "+((Template) renderContext.getRequest().getAttribute("usedTemplate")).serialize());
                } else {
                    logger.debug("usedTemplate object for rendering before script is null.");
                }
            }
            long start = 0;
            if (SettingsBean.getInstance().isDevelopmentMode() && Boolean.valueOf(renderContext.getRequest().getParameter("moduleinfo")) && !resource.getNode().isNodeType("jnt:pageTemplate")) {
                output.append("\n<fieldset> ");
                start = System.currentTimeMillis();
            }
            output.append(script.execute(resource, renderContext));

            if (logger.isDebugEnabled()) {
                if(renderContext.getRequest().getAttribute("previousTemplate")!=null) {
                    logger.debug("Current previousTemplate object for rendering after script: "+((Template) renderContext.getRequest().getAttribute("previousTemplate")).serialize());
                } else {
                    logger.debug("previousTemplate object for rendering after script is null.");
                }
                if(renderContext.getRequest().getAttribute("usedTemplate")!=null) {
                    logger.debug("Current usedTemplate object for rendering after script: "+((Template) renderContext.getRequest().getAttribute("usedTemplate")).serialize());
                } else {
                    logger.debug("usedTemplate object for rendering after script is null.");
                }
            }

            if (SettingsBean.getInstance().isDevelopmentMode() && Boolean.valueOf(renderContext.getRequest().getParameter("moduleinfo")) && !resource.getNode().isNodeType("jnt:pageTemplate")) {
                output.append("<legend>")
                        .append("<img src=\"")
                        .append(renderContext.getURLGenerator().getContext())
                        .append("/modules/default/images/icons/information.png")
                        .append("\" title=\"").append(script.getView().getInfo()).append(" node : ").append(resource.getNode().getPath())
                        .append(" in ").append(System.currentTimeMillis() - start).append( "ms")
                        .append("\"/></legend>");
                output.append("</fieldset> ");
            }

        } catch (RenderException e) {
            output.append(handleError(script.getView().getInfo(), e, renderContext, resource));
        } finally {
            renderContext.getResourcesStack().pop();
        }
        return output.toString().trim();
    }


    private static String handleError(String template, RenderException ex, RenderContext ctx, Resource resource)
            throws RenderException {

        String content = null;

        String onError = SettingsBean.getInstance().lookupString("templates.modules.onError");

        Throwable cause = ex.getCause() != null ? ex.getCause() : ex;

        if ("propagate".equals(onError)) {
            throw ex;
        } else if ("hide".equals(onError)) {
            logger.warn("Error including the content of the template '" + template + "'. Cause: " + cause.getMessage(),
                        cause);
            content = "";
        } else {
            logger.warn("Error including the content of the template '" + template + "'. Cause: " + cause.getMessage(),
                        cause);
            StringBuilder out = new StringBuilder(256);
            out.append("<div class=\"page-fragment-error\">").append(getErrorMessage(ctx, resource)).append(
                    !"compact".equals(onError) ? ": " + getExceptionDetails(cause) : "").append("</div>");

            content = out.toString();
        }

        return content;
    }

    private static String getErrorMessage(RenderContext ctx, Resource resource) {
//        return JahiaResourceBundle.getString(null, "templates.modules.onError", resource.getLocale(), ctx.getSite().getTemplatePackageName());
        return "Module error";
    }

    private static Object getExceptionDetails(Throwable ex) {
        StringWriter out = new StringWriter();
        out.append(ex.getMessage()).append("\n<!--\n");
        ex.printStackTrace(new PrintWriter(out));
        out.append("\n-->\n");

        return out.toString();
    }

}
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