/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-2015 The eXist Project
* http://exist-db.org
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.exist.webstart;
import java.io.EOFException;
import java.io.IOException;
import java.net.SocketException;
import java.nio.file.Path;
import java.nio.file.Paths;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
/**
* Dedicated servlet for Webstart.
*/
public class JnlpServlet extends HttpServlet {
private static final long serialVersionUID = 1238966115449192258L;
private static final Logger LOGGER = LogManager.getLogger(JnlpServlet.class);
private JnlpJarFiles jf = null;
private JnlpHelper jh = null;
/**
* Initialize servlet.
*/
@Override
public void init() throws ServletException {
LOGGER.info("Initializing JNLP servlet");
final String realPath = getServletContext().getRealPath("/");
if (realPath == null) {
final String txt = "getServletContext().getRealPath() did not return a "
+ "value. Webstart is not available.";
LOGGER.error(txt);
throw new ServletException(txt);
} else {
final Path contextRoot = Paths.get(realPath).normalize();
jh = new JnlpHelper(contextRoot);
jf = new JnlpJarFiles(jh);
}
}
private String stripFilename(String URI) {
final int lastPos = URI.lastIndexOf('/');
return URI.substring(lastPos + 1);
}
/**
* Handle webstart request for JNLP file, jar file or image.
*
* @param request Object representing http request.
* @param response Object representing http response.
* @throws ServletException Standard servlet exception
* @throws IOException Standard IO exception
*/
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
final JnlpWriter jw = new JnlpWriter();
final String requestURI = request.getRequestURI();
final String filename = stripFilename(request.getPathInfo());
LOGGER.debug("Requested URI=" + requestURI);
if (requestURI.endsWith(".jnlp")) {
jw.writeJnlpXML(jf, request, response);
} else if (requestURI.endsWith(".jar") || requestURI.endsWith(".jar.pack.gz")) {
jw.sendJar(jf, filename, request, response);
} else if (requestURI.endsWith(".gif") || requestURI.endsWith(".jpg")) {
jw.sendImage(jh, jf, filename, response);
} else {
LOGGER.error("Invalid filename extension.");
response.sendError(HttpServletResponse.SC_NOT_FOUND, filename + " not found.");
}
} catch (final EOFException | SocketException ex) {
LOGGER.debug(ex.getMessage());
} catch (final Throwable e) {
LOGGER.error(e);
throw new ServletException("An error occurred: " + e.getMessage());
}
}
@Override
protected long getLastModified(final HttpServletRequest req) {
try {
return jf.getLastModified();
} catch (final IOException e) {
LOGGER.error(e);
return -1l;
}
}
}