/*
* #!
* Ontopia Navigator
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* Licensed 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 net.ontopia.topicmaps.nav2.plugins;
import java.io.IOException;
import java.io.OutputStream;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;
/**
* INTERNAL: Servlet that returns a PNG image.
*/
public class PNGTreeServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) {
processRequest(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response) {
processRequest(request, response);
}
protected void processRequest(HttpServletRequest request, HttpServletResponse response) {
try {
response.setContentType("image/gif");
byte[] image = (byte[]) request.getSession().getAttribute("image");
OutputStream out = response.getOutputStream();
for (int pos = 0; pos < image.length; pos += 16384) {
int len = Math.min(16384, image.length - pos);
out.write(image, pos, len);
}
} catch (IOException e){
e.printStackTrace();
}
}
}