Java tutorial
/** * OpenKM, Open Document Management System (http://www.openkm.com) * Copyright (c) 2006-2015 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.openkm.servlet.admin; import java.io.IOException; import java.io.InputStream; import java.util.Iterator; import java.util.List; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; 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.apache.jackrabbit.extractor.TextExtractor; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.openkm.api.OKMDocument; import com.openkm.api.OKMRepository; import com.openkm.bean.Repository; import com.openkm.core.AccessDeniedException; import com.openkm.core.DatabaseException; import com.openkm.core.MimeTypeConfig; import com.openkm.core.PathNotFoundException; import com.openkm.core.RepositoryException; import com.openkm.extractor.RegisteredExtractors; import com.openkm.util.PathUtils; /** * Mime type management servlet */ public class CheckTextExtractionServlet extends BaseServlet { private static final long serialVersionUID = 1L; private static Logger log = LoggerFactory.getLogger(CheckTextExtractionServlet.class); public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { log.debug("doGet({}, {})", request, response); request.setCharacterEncoding("UTF-8"); updateSessionManager(request); ServletContext sc = getServletContext(); sc.setAttribute("repoPath", "/" + Repository.ROOT); sc.setAttribute("docUuid", null); sc.setAttribute("text", null); sc.setAttribute("time", null); sc.setAttribute("mimeType", null); sc.setAttribute("extractor", null); sc.getRequestDispatcher("/admin/check_text_extraction.jsp").forward(request, response); } @SuppressWarnings("unchecked") public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { log.debug("doPost({}, {})", request, response); request.setCharacterEncoding("UTF-8"); updateSessionManager(request); InputStream is = null; try { if (ServletFileUpload.isMultipartContent(request)) { FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); List<FileItem> items = upload.parseRequest(request); String docUuid = null; String repoPath = null; String text = null; String error = null; String mimeType = null; String extractor = null; for (Iterator<FileItem> it = items.iterator(); it.hasNext();) { FileItem item = it.next(); if (item.isFormField()) { if (item.getFieldName().equals("docUuid")) { docUuid = item.getString("UTF-8"); } else if (item.getFieldName().equals("repoPath")) { repoPath = item.getString("UTF-8"); } } else { is = item.getInputStream(); String name = FilenameUtils.getName(item.getName()); mimeType = MimeTypeConfig.mimeTypes.getContentType(name.toLowerCase()); if (!name.isEmpty() && item.getSize() > 0) { docUuid = null; repoPath = null; } else if (docUuid.isEmpty() && repoPath.isEmpty()) { mimeType = null; } } } if (docUuid != null && !docUuid.isEmpty()) { repoPath = OKMRepository.getInstance().getNodePath(null, docUuid); } if (repoPath != null && !repoPath.isEmpty()) { String name = PathUtils.getName(repoPath); mimeType = MimeTypeConfig.mimeTypes.getContentType(name.toLowerCase()); is = OKMDocument.getInstance().getContent(null, repoPath, false); } long begin = System.currentTimeMillis(); if (is != null) { if (!MimeTypeConfig.MIME_UNDEFINED.equals(mimeType)) { TextExtractor extClass = RegisteredExtractors.getTextExtractor(mimeType); if (extClass != null) { try { extractor = extClass.getClass().getCanonicalName(); text = RegisteredExtractors.getText(mimeType, null, is); } catch (Exception e) { error = e.getMessage(); } } else { extractor = "Undefined text extractor"; } } } ServletContext sc = getServletContext(); sc.setAttribute("docUuid", docUuid); sc.setAttribute("repoPath", repoPath); sc.setAttribute("text", text); sc.setAttribute("time", System.currentTimeMillis() - begin); sc.setAttribute("mimeType", mimeType); sc.setAttribute("error", error); sc.setAttribute("extractor", extractor); sc.getRequestDispatcher("/admin/check_text_extraction.jsp").forward(request, response); } } catch (DatabaseException e) { sendErrorRedirect(request, response, e); } catch (FileUploadException e) { sendErrorRedirect(request, response, e); } catch (PathNotFoundException e) { sendErrorRedirect(request, response, e); } catch (AccessDeniedException e) { sendErrorRedirect(request, response, e); } catch (RepositoryException e) { sendErrorRedirect(request, response, e); } finally { IOUtils.closeQuietly(is); } } }