Java tutorial
/** * ========================================================================================== * = JAHIA'S DUAL LICENSING - IMPORTANT INFORMATION = * ========================================================================================== * * http://www.jahia.com * * Copyright (C) 2002-2017 Jahia Solutions Group SA. All rights reserved. * * THIS FILE IS AVAILABLE UNDER TWO DIFFERENT LICENSES: * 1/GPL OR 2/JSEL * * 1/ GPL * ================================================================================== * * IF YOU DECIDE TO CHOOSE THE GPL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS: * * 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 3 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, see <http://www.gnu.org/licenses/>. * * * 2/ JSEL - Commercial and Supported Versions of the program * =================================================================================== * * IF YOU DECIDE TO CHOOSE THE JSEL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS: * * Alternatively, commercial and supported versions of the program - also known as * Enterprise Distributions - must 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.bin; import java.io.IOException; import java.io.InputStream; import javax.jcr.PathNotFoundException; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.disk.DiskFileItem; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.io.FilenameUtils; import org.apache.commons.io.IOUtils; import org.apache.commons.lang.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.jahia.services.content.JCRContentUtils; import org.jahia.services.content.JCRNodeWrapper; import org.jahia.services.content.JCRSessionFactory; import org.jahia.services.content.JCRSessionWrapper; import org.jahia.services.transform.DocumentConverterService; import org.jahia.settings.SettingsBean; import org.jahia.tools.files.FileUpload; import org.springframework.web.servlet.ModelAndView; /** * Performs conversion of the submitted document into specified format. * * @author Fabrice Cantegrel * @author Sergiy Shyrkov */ public class DocumentConverter extends JahiaController { private static Logger logger = LoggerFactory.getLogger(DocumentConverter.class); private DocumentConverterService converterService; private SettingsBean settingsBean; private boolean requireAuthenticatedUser = true; private ModelAndView handleGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { String workspace = null; String nodePath = null; String targetFileExtension = null; String pathInfo = request.getPathInfo(); // we expect the format: // /<workspace>/<file-node-path>.<target-file-extension> if (pathInfo != null && pathInfo.length() > 1) { pathInfo = StringUtils.substringAfter(pathInfo.substring(1), "/"); workspace = StringUtils.substringBefore(pathInfo, "/"); nodePath = StringUtils.substringAfter(pathInfo, workspace); if (nodePath.contains(".")) { targetFileExtension = StringUtils.substringAfterLast(nodePath, "."); nodePath = StringUtils.substringBeforeLast(nodePath, "."); } else { nodePath = null; } } // check required parameters if (!JCRContentUtils.isValidWorkspace(workspace) || StringUtils.isEmpty(nodePath) || StringUtils.isEmpty(targetFileExtension)) { response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Expected data not found in the request." + " Please check the documentation of the Jahia Document Converter Service for more details."); return null; } // check target format String targetFormat = converterService.getMimeType(targetFileExtension); if (targetFormat == null) { response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Cannot lookup MIME type that corresponds to file extension '" + targetFileExtension + "'"); return null; } InputStream is = null; try { JCRSessionWrapper session = JCRSessionFactory.getInstance().getCurrentUserSession(workspace); JCRNodeWrapper node = session.getNode(nodePath); if (node.isNodeType("nt:file")) { response.setContentType(targetFormat); response.setHeader("Content-Disposition", "attachment; filename=\"" + StringUtils.substringBeforeLast(node.getName(), ".") + "." + targetFileExtension + "\""); is = node.getFileContent().downloadFile(); converterService.convert(is, converterService.getMimeType(FilenameUtils.getExtension(node.getName())), response.getOutputStream(), targetFormat); } else { response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Path should correspond to a file node"); } } catch (PathNotFoundException e) { response.sendError(HttpServletResponse.SC_NOT_FOUND, e.getMessage()); } catch (Exception e) { response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage()); } finally { IOUtils.closeQuietly(is); } return null; } private ModelAndView handlePost(HttpServletRequest request, HttpServletResponse response) throws IOException { FileUpload fu = new FileUpload(request, settingsBean.getTmpContentDiskPath(), Integer.MAX_VALUE); if (fu.getFileItems().size() == 0) { response.sendError(HttpServletResponse.SC_BAD_REQUEST, "No file was submitted"); return null; } // take the first one DiskFileItem inputFile = fu.getFileItems().values().iterator().next(); InputStream stream = null; String returnedMimeType = fu.getParameterValues("mimeType") != null ? fu.getParameterValues("mimeType")[0] : null; if (returnedMimeType == null) { response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Missing required parameter mimeType"); return null; } try { ServletOutputStream outputStream = response.getOutputStream(); stream = inputFile.getInputStream(); // return a file response.setContentType(returnedMimeType); response.setHeader("Content-Disposition", "attachment; filename=\"" + FilenameUtils.getBaseName(inputFile.getName()) + "." + converterService.getExtension(returnedMimeType) + "\""); converterService.convert(stream, inputFile.getContentType(), outputStream, returnedMimeType); try { outputStream.flush(); } finally { outputStream.close(); } } catch (Exception e) { logger.error( "Error converting uploaded file " + inputFile.getFieldName() + ". Cause: " + e.getMessage(), e); response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Exception occurred: " + e.getMessage()); } finally { IOUtils.closeQuietly(stream); fu.disposeItems(); } return null; } public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception { if (requireAuthenticatedUser && isUserGuest()) { response.sendError(HttpServletResponse.SC_FORBIDDEN, "The service is available only for authenticated users."); return null; } if (!converterService.isEnabled()) { response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Conversion service is not enabled."); return null; } ModelAndView result = null; if (ServletFileUpload.isMultipartContent(request) || "get".equalsIgnoreCase(request.getMethod())) { long startTime = System.currentTimeMillis(); try { result = ServletFileUpload.isMultipartContent(request) ? handlePost(request, response) : handleGet(request, response); } finally { if (logger.isInfoEnabled()) { StringBuilder sb = new StringBuilder(100); sb.append("Converted [").append(request.getRequestURI()); JCRSessionFactory jcrSessionFactory = JCRSessionFactory.getInstance(); if (jcrSessionFactory.getCurrentUser() != null) { sb.append("] user=[").append(jcrSessionFactory.getCurrentUser().getUsername()); } sb.append("] ip=[").append(request.getRemoteAddr()).append("] sessionID=[") .append(request.getSession().getId()).append("] in [") .append(System.currentTimeMillis() - startTime).append("ms]"); logger.info(sb.toString()); } } } else { response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Multipart data is not found in the POST request"); return null; } return result; } /** * @param converterService the converterService to set */ public void setConverterService(DocumentConverterService converterService) { this.converterService = converterService; } /** * @param settingsBean the settingsBean to set */ public void setSettingsBean(SettingsBean settingsBean) { this.settingsBean = settingsBean; } public static String getPath() { return "/cms/convert"; } public void setRequireAuthenticatedUser(boolean requireAuthenticatedUser) { this.requireAuthenticatedUser = requireAuthenticatedUser; } }