Java tutorial
/** * * * openkm, Open Document Management System (http://www.openkm.com) * Copyright (c) 2006-2013 Paco Avila & Josep Llort * * No bytes were intentionally harmed during the development of this application. * * 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. */ package com.ikon.servlet.admin; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sourceforge.jiu.codecs.InvalidFileStructureException; import net.sourceforge.jiu.codecs.InvalidImageIndexException; import net.sourceforge.jiu.codecs.UnsupportedTypeException; import net.sourceforge.jiu.ops.MissingParameterException; import net.sourceforge.jiu.ops.WrongParameterException; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileItemFactory; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.io.FilenameUtils; import org.apache.commons.io.IOUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.ikon.core.DatabaseException; import com.ikon.core.MimeTypeConfig; import com.ikon.core.ParseException; import com.ikon.core.RepositoryException; import com.ikon.dao.OmrDAO; import com.ikon.dao.bean.Omr; import com.ikon.omr.OMRHelper; import com.ikon.util.FileUtils; import com.ikon.util.OMRException; import com.ikon.util.PropertyGroupUtils; import com.ikon.util.UserActivity; import com.ikon.util.WebUtils; /** * omr servlet */ public class OmrServlet extends BaseServlet { private static final long serialVersionUID = 1L; private static Logger log = LoggerFactory.getLogger(OmrServlet.class); private static final int FILE_TEMPLATE = 1; private static final int FILE_ASC = 2; private static final int FILE_CONFIG = 3; private static final int FILE_FIELDS = 4; public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { log.debug("doGet({}, {})", request, response); request.setCharacterEncoding("UTF-8"); String action = WebUtils.getString(request, "action"); String userId = request.getRemoteUser(); updateSessionManager(request); try { if (action.equals("create")) { create(userId, request, response); } else if (action.equals("edit")) { edit(userId, request, response); } else if (action.equals("delete")) { delete(userId, request, response); } else if (action.equals("downloadFile")) { downloadFile(userId, request, response); } else if (action.equals("editAsc")) { editAscFile(userId, request, response); } else if (action.equals("editFields")) { editFieldsFile(userId, request, response); } else if (action.equals("check")) { check(userId, request, response); } else { list(userId, request, response); } } catch (DatabaseException e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } catch (Exception e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } } @SuppressWarnings("unchecked") public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { log.debug("doPost({}, {})", request, response); request.setCharacterEncoding("UTF-8"); String action = ""; String userId = request.getRemoteUser(); updateSessionManager(request); try { if (ServletFileUpload.isMultipartContent(request)) { String fileName = null; InputStream is = null; FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); List<FileItem> items = upload.parseRequest(request); Set<String> properties = new HashSet<String>(); Omr om = new Omr(); for (Iterator<FileItem> it = items.iterator(); it.hasNext();) { FileItem item = it.next(); if (item.isFormField()) { if (item.getFieldName().equals("action")) { action = item.getString("UTF-8"); } else if (item.getFieldName().equals("om_id")) { om.setId(Integer.parseInt(item.getString("UTF-8"))); } else if (item.getFieldName().equals("om_name")) { om.setName(item.getString("UTF-8")); } else if (item.getFieldName().equals("om_properties")) { properties.add(item.getString("UTF-8")); } else if (item.getFieldName().equals("om_active")) { om.setActive(true); } } else { is = item.getInputStream(); fileName = item.getName(); } } om.setProperties(properties); if (action.equals("create") || action.equals("edit")) { // Store locally template file to be used later if (is != null && is.available() > 0) { // Case update only name byte[] data = IOUtils.toByteArray(is); File tmp = FileUtils.createTempFile(); FileOutputStream fos = new FileOutputStream(tmp); IOUtils.write(data, fos); IOUtils.closeQuietly(fos); // Store template file om.setTemplateFileName(FilenameUtils.getName(fileName)); om.setTemplateFileMime(MimeTypeConfig.mimeTypes.getContentType(fileName)); om.setTemplateFilContent(data); IOUtils.closeQuietly(is); // Create training files Map<String, File> trainingMap = OMRHelper.trainingTemplate(tmp); File ascFile = trainingMap.get(OMRHelper.ASC_FILE); File configFile = trainingMap.get(OMRHelper.CONFIG_FILE); // Store asc file om.setAscFileName(om.getTemplateFileName() + ".asc"); om.setAscFileMime(MimeTypeConfig.MIME_TEXT); is = new FileInputStream(ascFile); om.setAscFileContent(IOUtils.toByteArray(is)); IOUtils.closeQuietly(is); // Store config file om.setConfigFileName(om.getTemplateFileName() + ".config"); om.setConfigFileMime(MimeTypeConfig.MIME_TEXT); is = new FileInputStream(configFile); om.setConfigFileContent(IOUtils.toByteArray(is)); IOUtils.closeQuietly(is); // Delete temporal files FileUtils.deleteQuietly(tmp); FileUtils.deleteQuietly(ascFile); FileUtils.deleteQuietly(configFile); } if (action.equals("create")) { long id = OmrDAO.getInstance().create(om); // Activity log UserActivity.log(userId, "ADMIN_OMR_CREATE", Long.toString(id), null, om.toString()); } else if (action.equals("edit")) { OmrDAO.getInstance().updateTemplate(om); om = OmrDAO.getInstance().findByPk(om.getId()); // Activity log UserActivity.log(userId, "ADMIN_OMR_EDIT", Long.toString(om.getId()), null, om.toString()); } list(userId, request, response); } else if (action.equals("delete")) { OmrDAO.getInstance().delete(om.getId()); // Activity log UserActivity.log(userId, "ADMIN_OMR_DELETE", Long.toString(om.getId()), null, null); list(userId, request, response); } else if (action.equals("editAsc")) { Omr omr = OmrDAO.getInstance().findByPk(om.getId()); omr.setAscFileContent(IOUtils.toByteArray(is)); omr.setAscFileMime(MimeTypeConfig.MIME_TEXT); omr.setAscFileName(omr.getTemplateFileName() + ".asc"); OmrDAO.getInstance().update(omr); omr = OmrDAO.getInstance().findByPk(om.getId()); IOUtils.closeQuietly(is); // Activity log UserActivity.log(userId, "ADMIN_OMR_EDIT_ASC", Long.toString(om.getId()), null, null); list(userId, request, response); } else if (action.equals("editFields")) { Omr omr = OmrDAO.getInstance().findByPk(om.getId()); omr.setFieldsFileContent(IOUtils.toByteArray(is)); omr.setFieldsFileMime(MimeTypeConfig.MIME_TEXT); omr.setFieldsFileName(omr.getTemplateFileName() + ".fields"); OmrDAO.getInstance().update(omr); omr = OmrDAO.getInstance().findByPk(om.getId()); IOUtils.closeQuietly(is); // Activity log UserActivity.log(userId, "ADMIN_OMR_EDIT_FIELDS", Long.toString(om.getId()), null, null); list(userId, request, response); } else if (action.equals("check")) { File form = FileUtils.createTempFile(); OutputStream formFile = new FileOutputStream(form); formFile.write(IOUtils.toByteArray(is)); IOUtils.closeQuietly(formFile); formFile.close(); Map<String, String> results = OMRHelper.process(form, om.getId()); FileUtils.deleteQuietly(form); IOUtils.closeQuietly(is); UserActivity.log(userId, "ADMIN_OMR_CHECK_TEMPLATE", Long.toString(om.getId()), null, null); results(userId, request, response, action, results, om.getId()); } } } catch (DatabaseException e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } catch (FileUploadException e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } catch (OMRException e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } catch (InvalidFileStructureException e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } catch (InvalidImageIndexException e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } catch (UnsupportedTypeException e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } catch (MissingParameterException e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } catch (WrongParameterException e) { log.error(e.getMessage(), e); sendErrorRedirect(request, response, e); } } /** * List omr templates */ private void list(String userId, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, DatabaseException { log.debug("list({}, {}, {})", new Object[] { userId, request, response }); ServletContext sc = getServletContext(); List<Omr> list = OmrDAO.getInstance().findAll(); sc.setAttribute("omr", list); sc.getRequestDispatcher("/admin/omr_list.jsp").forward(request, response); log.debug("list: void"); } /** * New omr template */ private void create(String userId, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, DatabaseException, ParseException, RepositoryException { log.debug("create({}, {}, {})", new Object[] { userId, request, response }); ServletContext sc = getServletContext(); Omr om = new Omr(); sc.setAttribute("action", WebUtils.getString(request, "action")); sc.setAttribute("om", om); sc.setAttribute("properties", PropertyGroupUtils.getAllGroupsProperties()); sc.getRequestDispatcher("/admin/omr_edit.jsp").forward(request, response); log.debug("create: void"); } /** * edit type record */ private void edit(String userId, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, DatabaseException, ParseException, RepositoryException { log.debug("edit({}, {}, {})", new Object[] { userId, request, response }); ServletContext sc = getServletContext(); long omId = WebUtils.getLong(request, "om_id"); sc.setAttribute("action", WebUtils.getString(request, "action")); sc.setAttribute("om", OmrDAO.getInstance().findByPk(omId)); sc.setAttribute("properties", PropertyGroupUtils.getAllGroupsProperties()); sc.getRequestDispatcher("/admin/omr_edit.jsp").forward(request, response); log.debug("edit: void"); } /** * delete type record */ private void delete(String userId, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, DatabaseException { log.debug("delete({}, {}, {})", new Object[] { userId, request, response }); ServletContext sc = getServletContext(); long omId = WebUtils.getLong(request, "om_id"); sc.setAttribute("action", WebUtils.getString(request, "action")); sc.setAttribute("om", OmrDAO.getInstance().findByPk(omId)); sc.getRequestDispatcher("/admin/omr_edit.jsp").forward(request, response); log.debug("delete: void"); } /** * download file */ private void downloadFile(String userId, HttpServletRequest request, HttpServletResponse response) throws DatabaseException, IOException { log.debug("downloadFile({}, {}, {})", new Object[] { userId, request, response }); long omId = WebUtils.getLong(request, "om_id"); int fileType = WebUtils.getInt(request, "type"); Omr omr = OmrDAO.getInstance().findByPk(omId); if (omr != null && fileType >= FILE_TEMPLATE && fileType <= FILE_FIELDS) { OutputStream os = response.getOutputStream(); try { byte[] fileContent = null; switch (fileType) { case FILE_TEMPLATE: fileContent = omr.getTemplateFileContent(); WebUtils.prepareSendFile(request, response, omr.getTemplateFileName(), omr.getTemplateFileMime(), false); break; case FILE_ASC: fileContent = omr.getAscFileContent(); WebUtils.prepareSendFile(request, response, omr.getAscFileName(), omr.getAscFileMime(), false); break; case FILE_CONFIG: fileContent = omr.getConfigFileContent(); WebUtils.prepareSendFile(request, response, omr.getConfigFileName(), omr.getConfigFileMime(), false); break; case FILE_FIELDS: fileContent = omr.getFieldsFileContent(); WebUtils.prepareSendFile(request, response, omr.getFieldsFileName(), omr.getFieldsFileMime(), false); break; } if (fileContent != null) { response.setContentLength(fileContent.length); os.write(fileContent); os.flush(); } } finally { IOUtils.closeQuietly(os); } } log.debug("downloadFile: void"); } /** * editAscFile */ private void editAscFile(String userId, HttpServletRequest request, HttpServletResponse response) throws DatabaseException, ServletException, IOException { ServletContext sc = getServletContext(); long omId = WebUtils.getLong(request, "om_id"); sc.setAttribute("action", WebUtils.getString(request, "action")); sc.setAttribute("om", OmrDAO.getInstance().findByPk(omId)); sc.getRequestDispatcher("/admin/omr_edit_asc.jsp").forward(request, response); log.debug("editAscFile: void"); } /** * editFieldsFile */ private void editFieldsFile(String userId, HttpServletRequest request, HttpServletResponse response) throws DatabaseException, ServletException, IOException { ServletContext sc = getServletContext(); long omId = WebUtils.getLong(request, "om_id"); sc.setAttribute("action", WebUtils.getString(request, "action")); sc.setAttribute("om", OmrDAO.getInstance().findByPk(omId)); sc.getRequestDispatcher("/admin/omr_edit_fields.jsp").forward(request, response); log.debug("editFieldsFile: void"); } /** * check */ private void check(String userId, HttpServletRequest request, HttpServletResponse response) throws DatabaseException, ServletException, IOException { ServletContext sc = getServletContext(); long omId = WebUtils.getLong(request, "om_id"); sc.setAttribute("action", WebUtils.getString(request, "action")); sc.setAttribute("om", OmrDAO.getInstance().findByPk(omId)); sc.setAttribute("results", null); sc.getRequestDispatcher("/admin/omr_check.jsp").forward(request, response); log.debug("check: void"); } /** * results */ private void results(String userId, HttpServletRequest request, HttpServletResponse response, String action, Map<String, String> results, long omId) throws DatabaseException, ServletException, IOException { ServletContext sc = getServletContext(); sc.setAttribute("action", action); sc.setAttribute("om", OmrDAO.getInstance().findByPk(omId)); sc.setAttribute("results", results); sc.getRequestDispatcher("/admin/omr_check.jsp").forward(request, response); log.debug("check: void"); } }