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; import java.io.IOException; import java.io.InputStream; import java.io.StringWriter; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.io.IOUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.openkm.api.OKMDocument; import com.openkm.core.AccessDeniedException; import com.openkm.core.DatabaseException; import com.openkm.core.PathNotFoundException; import com.openkm.core.RepositoryException; import com.openkm.servlet.admin.BaseServlet; import com.openkm.util.WebUtils; /** * Html Preview Servlet * * Take a look at available brushes alias at http://alexgorbatchev.com/SyntaxHighlighter/manual/brushes/ */ public class HtmlPreviewServlet extends BaseServlet { private static Logger log = LoggerFactory.getLogger(HtmlPreviewServlet.class); private static final long serialVersionUID = 1L; /** * */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { log.debug("doGet({}, {})", request, response); String uuid = WebUtils.getString(request, "uuid"); InputStream fis = null; try { fis = OKMDocument.getInstance().getContent(null, uuid, false); StringWriter writer = new StringWriter(); IOUtils.copy(fis, writer, "UTF-8"); String content = writer.getBuffer().toString(); ServletContext sc = getServletContext(); sc.setAttribute("content", content); sc.getRequestDispatcher("/html_preview.jsp").forward(request, response); } catch (PathNotFoundException e) { sendErrorRedirect(request, response, e); } catch (AccessDeniedException e) { sendErrorRedirect(request, response, e); } catch (RepositoryException e) { sendErrorRedirect(request, response, e); } catch (DatabaseException e) { sendErrorRedirect(request, response, e); } finally { IOUtils.closeQuietly(fis); } } }