/*
* 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.apache.openmeetings.servlet.outputhandler;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Date;
import java.util.List;
import java.util.Set;
import javax.servlet.ServletException;
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.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.JPEGTranscoder;
import org.apache.openmeetings.batik.beans.PrintBean;
import org.apache.openmeetings.data.record.WhiteboardMapToSVG;
import org.apache.openmeetings.db.dao.server.SessiondataDao;
import org.apache.openmeetings.db.dao.user.UserDao;
import org.apache.openmeetings.db.entity.user.User.Right;
import org.apache.openmeetings.remote.PrintService;
import org.apache.openmeetings.servlet.BaseHttpServlet;
import org.apache.openmeetings.servlet.ServerNotInitializedException;
import org.apache.openmeetings.util.CalendarPatterns;
import org.apache.openmeetings.util.OmFileHelper;
import org.apache.openmeetings.util.OpenmeetingsVariables;
import org.red5.logging.Red5LoggerFactory;
import org.slf4j.Logger;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
public class ExportToImage extends BaseHttpServlet {
private static final long serialVersionUID = -3535998254746084297L;
private static final Logger log = Red5LoggerFactory.getLogger(
ExportToImage.class, OpenmeetingsVariables.webAppRootKey);
/*
* (non-Javadoc)
*
* @see
* javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest
* , javax.servlet.http.HttpServletResponse)
*/
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException,
IOException {
try {
String sid = request.getParameter("sid");
if (sid == null) {
sid = "default";
}
log.debug("sid: " + sid);
String hash = request.getParameter("hash");
if (hash == null) {
hash = "";
}
log.debug("hash: " + hash);
String fileName = request.getParameter("fileName");
if (fileName == null) {
fileName = "file_xyz";
}
String exportType = request.getParameter("exportType");
if (exportType == null) {
exportType = "svg";
}
Long users_id = getBean(SessiondataDao.class).checkSession(sid);
Set<Right> rights = getBean(UserDao.class).getRights(users_id);
log.debug("users_id: " + users_id);
if (rights != null && !rights.isEmpty() && 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
File uploadTempDir = OmFileHelper.getUploadTempDir();
log.debug("working_dir: " + uploadTempDir);
String reqFilePrefix = fileName + "_" + CalendarPatterns.getTimeForStreamId(new Date());
File svgFile = new File(uploadTempDir, reqFilePrefix + ".svg");
log.debug("exported svg file: " + svgFile.getCanonicalPath());
FileWriter out = new FileWriter(svgFile);
svgGenerator.stream(out, useCSS);
out.flush();
out.close();
File expFile = new File(uploadTempDir, reqFilePrefix + "." + exportType);
log.debug("exported file: " + expFile.getCanonicalPath());
if ("svg".equals(exportType)) {
outFile(response, expFile);
} else if ("jpg".equals(exportType)) {
JPEGTranscoder t = new JPEGTranscoder();
t.addTranscodingHint(JPEGTranscoder.KEY_QUALITY, 1f);
OutputStream ostream = new FileOutputStream(expFile);
TranscoderOutput output = new TranscoderOutput(new FileOutputStream(expFile));
// Perform the transcoding.
t.transcode(new TranscoderInput(svgFile.toURI().toString()), output);
ostream.flush();
ostream.close();
outFile(response, expFile);
} else if (exportType.equals("png")
|| exportType.equals("gif") || exportType.equals("tif")
|| exportType.equals("pdf")) {
//TODO not implemented yet
}
}
} catch (ServerNotInitializedException e) {
return;
} catch (Exception er) {
log.error("Error exporting to image ", er);
}
}
private void outFile(HttpServletResponse response, File f) throws IOException {
response.reset();
response.resetBuffer();
OutputStream outStream = response.getOutputStream();
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", "attachment; filename=\"" + f.getName() + "\"");
response.setHeader("Content-Length", "" + f.length());
OmFileHelper.copyFile(f, outStream);
outStream.close();
}
}