Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License") + you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.openmeetings.servlet.outputhandler; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.io.OutputStream; import java.io.RandomAccessFile; import java.io.Writer; import java.util.Date; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.batik.dom.GenericDOMImplementation; import org.apache.batik.dom.svg.SVGDOMImplementation; import org.apache.batik.svggen.SVGGraphics2D; import org.openmeetings.app.OpenmeetingsVariables; import org.openmeetings.app.batik.beans.PrintBean; import org.openmeetings.app.data.basic.Sessionmanagement; import org.openmeetings.app.data.record.WhiteboardMapToSVG; import org.openmeetings.app.data.user.Usermanagement; import org.openmeetings.app.documents.GenerateImage; import org.openmeetings.app.remote.PrintService; import org.openmeetings.app.remote.red5.ScopeApplicationAdapter; import org.openmeetings.utils.math.CalendarPatterns; import org.red5.logging.Red5LoggerFactory; import org.slf4j.Logger; import org.springframework.context.ApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; import org.w3c.dom.DOMImplementation; import org.w3c.dom.Document; import org.w3c.dom.Element; public class ExportToImage extends HttpServlet { private static final long serialVersionUID = -3535998254746084297L; private static final Logger log = Red5LoggerFactory.getLogger(ExportToImage.class, OpenmeetingsVariables.webAppRootKey); public Sessionmanagement getSessionManagement() { try { if (ScopeApplicationAdapter.initComplete) { ApplicationContext context = WebApplicationContextUtils .getWebApplicationContext(getServletContext()); return (Sessionmanagement) context.getBean("sessionManagement"); } } catch (Exception err) { log.error("[getSessionManagement]", err); } return null; } public Usermanagement getUserManagement() { try { if (ScopeApplicationAdapter.initComplete) { ApplicationContext context = WebApplicationContextUtils .getWebApplicationContext(getServletContext()); return (Usermanagement) context.getBean("userManagement"); } } catch (Exception err) { log.error("[getUserManagement]", err); } return null; } public GenerateImage getGenerateImage() { try { if (ScopeApplicationAdapter.initComplete) { ApplicationContext context = WebApplicationContextUtils .getWebApplicationContext(getServletContext()); return (GenerateImage) context.getBean("generateImage"); } } catch (Exception err) { log.error("[getGenerateImage]", err); } return null; } /* * (non-Javadoc) * * @see * javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest * , javax.servlet.http.HttpServletResponse) */ @Override protected void service(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws ServletException, IOException { try { if (getUserManagement() == null || getSessionManagement() == null || getGenerateImage() == null) { return; } String sid = httpServletRequest.getParameter("sid"); if (sid == null) { sid = "default"; } log.debug("sid: " + sid); String hash = httpServletRequest.getParameter("hash"); if (hash == null) { hash = ""; } log.debug("hash: " + hash); String fileName = httpServletRequest.getParameter("fileName"); if (fileName == null) { fileName = "file_xyz"; } String exportType = httpServletRequest.getParameter("exportType"); if (exportType == null) { exportType = "svg"; } Long users_id = getSessionManagement().checkSession(sid); Long user_level = getUserManagement().getUserLevelByID(users_id); log.debug("users_id: " + users_id); log.debug("user_level: " + user_level); if (user_level != null && user_level > 0 && hash != "") { PrintBean pBean = PrintService.getPrintItemByHash(hash); // Whiteboard Objects @SuppressWarnings("rawtypes") List whiteBoardMap = pBean.getMap(); // Get a DOMImplementation. DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation(); // Create an instance of org.w3c.dom.Document. // String svgNS = "http://www.w3.org/2000/svg"; String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI; Document document = domImpl.createDocument(svgNS, "svg", null); // Get the root element (the 'svg' element). Element svgRoot = document.getDocumentElement(); // Set the width and height attributes on the root 'svg' // element. svgRoot.setAttributeNS(null, "width", "" + pBean.getWidth()); svgRoot.setAttributeNS(null, "height", "" + pBean.getHeight()); log.debug("pBean.getWidth(),pBean.getHeight()" + pBean.getWidth() + "," + pBean.getHeight()); // Create an instance of the SVG Generator. SVGGraphics2D svgGenerator = new SVGGraphics2D(document); svgGenerator = WhiteboardMapToSVG.getInstance().convertMapToSVG(svgGenerator, whiteBoardMap); // Finally, stream out SVG to the standard output using // UTF-8 encoding. boolean useCSS = true; // we want to use CSS style attributes // Writer out = new OutputStreamWriter(System.out, "UTF-8"); if (exportType.equals("svg")) { // OutputStream out = httpServletResponse.getOutputStream(); // httpServletResponse.setContentType("APPLICATION/OCTET-STREAM"); // httpServletResponse.setHeader("Content-Disposition","attachment; filename=\"" // + requestedFile + "\""); Writer out = httpServletResponse.getWriter(); svgGenerator.stream(out, useCSS); } else if (exportType.equals("png") || exportType.equals("jpg") || exportType.equals("gif") || exportType.equals("tif") || exportType.equals("pdf")) { String current_dir = getServletContext().getRealPath("/"); String working_dir = current_dir + OpenmeetingsVariables.UPLOAD_TEMP_DIR + File.separatorChar; String requestedFileSVG = fileName + "_" + CalendarPatterns.getTimeForStreamId(new Date()) + ".svg"; String resultFileName = fileName + "_" + CalendarPatterns.getTimeForStreamId(new Date()) + "." + exportType; log.debug("current_dir: " + current_dir); log.debug("working_dir: " + working_dir); log.debug("requestedFileSVG: " + requestedFileSVG); log.debug("resultFileName: " + resultFileName); File svgFile = new File(working_dir + requestedFileSVG); File resultFile = new File(working_dir + resultFileName); log.debug("svgFile: " + svgFile.getAbsolutePath()); log.debug("resultFile: " + resultFile.getAbsolutePath()); log.debug("svgFile P: " + svgFile.getPath()); log.debug("resultFile P: " + resultFile.getPath()); FileWriter out = new FileWriter(svgFile); svgGenerator.stream(out, useCSS); // Get file and handle download RandomAccessFile rf = new RandomAccessFile(resultFile.getAbsoluteFile(), "r"); httpServletResponse.reset(); httpServletResponse.resetBuffer(); OutputStream outStream = httpServletResponse.getOutputStream(); httpServletResponse.setContentType("APPLICATION/OCTET-STREAM"); httpServletResponse.setHeader("Content-Disposition", "attachment; filename=\"" + resultFileName + "\""); httpServletResponse.setHeader("Content-Length", "" + rf.length()); byte[] buffer = new byte[1024]; int readed = -1; while ((readed = rf.read(buffer, 0, buffer.length)) > -1) { outStream.write(buffer, 0, readed); } outStream.close(); rf.close(); out.flush(); out.close(); } } } catch (Exception er) { log.error("ERROR ", er); System.out.println("Error exporting: " + er); er.printStackTrace(); } } }