org.alfresco.web.bean.ajax.ContentUpdateBean.java Source code

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Here is the source code for org.alfresco.web.bean.ajax.ContentUpdateBean.java

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/*
 * #%L
 * Alfresco Repository WAR Community
 * %%
 * Copyright (C) 2005 - 2016 Alfresco Software Limited
 * %%
 * This file is part of the Alfresco software. 
 * If the software was purchased under a paid Alfresco license, the terms of 
 * the paid license agreement will prevail.  Otherwise, the software is 
 * provided under the following open source license terms:
 * 
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Alfresco 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */
package org.alfresco.web.bean.ajax;

import java.io.File;
import java.io.Serializable;
import java.util.List;

import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.servlet.http.HttpServletRequest;

import org.alfresco.model.ContentModel;
import org.alfresco.repo.content.MimetypeMap;
import org.alfresco.service.ServiceRegistry;
import org.alfresco.service.cmr.repository.ContentWriter;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.util.TempFileProvider;
import org.alfresco.web.app.servlet.ajax.InvokeCommand;
import org.alfresco.web.bean.repository.Repository;
import org.alfresco.util.XMLUtil;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * Bean managing the ajax servlet upload of a multi-part form containing file content
 * to replace the content of a node within the repository. 
 * 
 * @author Mike Hatfield
 */
public class ContentUpdateBean implements Serializable {
    private static final long serialVersionUID = -7209326198823950952L;

    private static Log logger = LogFactory.getLog(ContentUpdateBean.class);

    /**
     * Ajax method to update file content. A multi-part form is required as the input.
     * 
     * "return-page" = javascript to execute on return from the upload request
     * "nodeRef" = the nodeRef of the item to update the content of
     * 
     * @throws Exception
     */
    @InvokeCommand.ResponseMimetype(value = MimetypeMap.MIMETYPE_HTML)
    public void updateFile() throws Exception {
        FacesContext fc = FacesContext.getCurrentInstance();
        ExternalContext externalContext = fc.getExternalContext();
        HttpServletRequest request = (HttpServletRequest) externalContext.getRequest();

        ServletFileUpload upload = new ServletFileUpload(new DiskFileItemFactory());
        upload.setHeaderEncoding("UTF-8");

        List<FileItem> fileItems = upload.parseRequest(request);
        String strNodeRef = null;
        String strFilename = null;
        String strReturnPage = null;
        File file = null;

        for (FileItem item : fileItems) {
            if (item.isFormField() && item.getFieldName().equals("return-page")) {
                strReturnPage = item.getString();
            } else if (item.isFormField() && item.getFieldName().equals("nodeRef")) {
                strNodeRef = item.getString();
            } else {
                strFilename = FilenameUtils.getName(item.getName());
                file = TempFileProvider.createTempFile("alfresco", ".upload");
                item.write(file);
            }
        }

        if (logger.isDebugEnabled())
            logger.debug("Ajax content update request: " + strFilename + " to nodeRef: " + strNodeRef
                    + " return page: " + strReturnPage);

        try {
            if (file != null && strNodeRef != null && strNodeRef.length() != 0) {
                NodeRef nodeRef = new NodeRef(strNodeRef);
                if (nodeRef != null) {
                    ServiceRegistry services = Repository.getServiceRegistry(fc);

                    // get a writer for the content and put the file
                    ContentWriter writer = services.getContentService().getWriter(nodeRef,
                            ContentModel.PROP_CONTENT, true);
                    writer.putContent(file);
                }
            }
        } catch (Exception e) {
            strReturnPage = strReturnPage.replace("${UPLOAD_ERROR}", e.getMessage());
        }

        Document result = XMLUtil.newDocument();
        Element htmlEl = result.createElement("html");
        result.appendChild(htmlEl);
        Element bodyEl = result.createElement("body");
        htmlEl.appendChild(bodyEl);

        Element scriptEl = result.createElement("script");
        bodyEl.appendChild(scriptEl);
        scriptEl.setAttribute("type", "text/javascript");
        Node scriptText = result.createTextNode(strReturnPage);
        scriptEl.appendChild(scriptText);

        if (logger.isDebugEnabled())
            logger.debug("Content update request complete.");

        ResponseWriter out = fc.getResponseWriter();
        XMLUtil.print(result, out);
    }
}