// 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 com.cloud.consoleproxy;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import com.sun.net.httpserver.Headers;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.cloud.consoleproxy.util.Logger;
public class ConsoleProxyAjaxImageHandler implements HttpHandler {
private static final Logger s_logger = Logger.getLogger(ConsoleProxyAjaxImageHandler.class);
@Override
public void handle(HttpExchange t) throws IOException {
try {
if (s_logger.isDebugEnabled())
s_logger.debug("AjaxImageHandler " + t.getRequestURI());
long startTick = System.currentTimeMillis();
doHandle(t);
if (s_logger.isDebugEnabled())
s_logger.debug(t.getRequestURI() + "Process time " + (System.currentTimeMillis() - startTick) + " ms");
} catch (IOException e) {
throw e;
} catch (IllegalArgumentException e) {
s_logger.warn("Exception, ", e);
t.sendResponseHeaders(400, -1); // bad request
} catch (OutOfMemoryError e) {
s_logger.error("Unrecoverable OutOfMemory Error, exit and let it be re-launched");
System.exit(1);
} catch (Throwable e) {
s_logger.error("Unexpected exception, ", e);
t.sendResponseHeaders(500, -1); // server error
} finally {
t.close();
}
}
private void doHandle(HttpExchange t) throws Exception, IllegalArgumentException {
String queries = t.getRequestURI().getQuery();
Map<String, String> queryMap = ConsoleProxyHttpHandlerHelper.getQueryMap(queries);
String host = queryMap.get("host");
String portStr = queryMap.get("port");
String sid = queryMap.get("sid");
String tag = queryMap.get("tag");
String ticket = queryMap.get("ticket");
String keyStr = queryMap.get("key");
String console_url = queryMap.get("consoleurl");
String console_host_session = queryMap.get("sessionref");
String w = queryMap.get("w");
String h = queryMap.get("h");
int key = 0;
int width = 144;
int height = 110;
if (tag == null)
tag = "";
int port;
if (host == null || portStr == null || sid == null)
throw new IllegalArgumentException();
try {
port = Integer.parseInt(portStr);
} catch (NumberFormatException e) {
s_logger.warn("Invalid numeric parameter in query string: " + portStr);
throw new IllegalArgumentException(e);
}
try {
if (keyStr != null)
key = Integer.parseInt(keyStr);
if (null != w)
width = Integer.parseInt(w);
if (null != h)
height = Integer.parseInt(h);
} catch (NumberFormatException e) {
s_logger.warn("Invalid numeric parameter in query string: " + keyStr);
throw new IllegalArgumentException(e);
}
ConsoleProxyClientParam param = new ConsoleProxyClientParam();
param.setClientHostAddress(host);
param.setClientHostPort(port);
param.setClientHostPassword(sid);
param.setClientTag(tag);
param.setTicket(ticket);
param.setClientTunnelUrl(console_url);
param.setClientTunnelSession(console_host_session);
ConsoleProxyClient viewer = ConsoleProxy.getVncViewer(param);
if (key == 0) {
Image scaledImage = viewer.getClientScaledImage(width, height);
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
Graphics2D bufImageGraphics = bufferedImage.createGraphics();
bufImageGraphics.drawImage(scaledImage, 0, 0, null);
ByteArrayOutputStream bos = new ByteArrayOutputStream(8196);
javax.imageio.ImageIO.write(bufferedImage, "jpg", bos);
byte[] bs = bos.toByteArray();
Headers hds = t.getResponseHeaders();
hds.set("Content-Type", "image/jpeg");
hds.set("Cache-Control", "no-cache");
hds.set("Cache-Control", "no-store");
t.sendResponseHeaders(200, bs.length);
OutputStream os = t.getResponseBody();
os.write(bs);
os.close();
} else {
AjaxFIFOImageCache imageCache = viewer.getAjaxImageCache();
byte[] img = imageCache.getImage(key);
if (img != null) {
Headers hds = t.getResponseHeaders();
hds.set("Content-Type", "image/jpeg");
t.sendResponseHeaders(200, img.length);
OutputStream os = t.getResponseBody();
try {
os.write(img, 0, img.length);
} finally {
os.close();
}
} else {
if (s_logger.isInfoEnabled())
s_logger.info("Image has already been swept out, key: " + key);
t.sendResponseHeaders(404, -1);
}
}
}
}