// 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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URLDecoder;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.cloud.consoleproxy.util.Logger;
import com.sun.net.httpserver.Headers;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
public class ConsoleProxyAjaxHandler implements HttpHandler {
private static final Logger s_logger = Logger.getLogger(ConsoleProxyAjaxHandler.class);
public ConsoleProxyAjaxHandler() {
}
public void handle(HttpExchange t) throws IOException {
try {
if(s_logger.isTraceEnabled())
s_logger.trace("AjaxHandler " + t.getRequestURI());
long startTick = System.currentTimeMillis();
doHandle(t);
if(s_logger.isTraceEnabled())
s_logger.trace(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(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();
if(s_logger.isTraceEnabled())
s_logger.trace("Handle AJAX request: " + queries);
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 ajaxSessionIdStr = queryMap.get("sess");
String eventStr = queryMap.get("event");
String console_url = queryMap.get("consoleurl");
String console_host_session = queryMap.get("sessionref");
String vm_locale = queryMap.get("locale");
if(tag == null)
tag = "";
long ajaxSessionId = 0;
int event = 0;
int port;
if(host == null || portStr == null || sid == null)
throw new IllegalArgumentException();
try {
port = Integer.parseInt(portStr);
} catch (NumberFormatException e) {
s_logger.warn("Invalid number parameter in query string: " + portStr);
throw new IllegalArgumentException(e);
}
if(ajaxSessionIdStr != null) {
try {
ajaxSessionId = Long.parseLong(ajaxSessionIdStr);
} catch (NumberFormatException e) {
s_logger.warn("Invalid number parameter in query string: " + ajaxSessionIdStr);
throw new IllegalArgumentException(e);
}
}
if(eventStr != null) {
try {
event = Integer.parseInt(eventStr);
} catch (NumberFormatException e) {
s_logger.warn("Invalid number parameter in query string: " + eventStr);
throw new IllegalArgumentException(e);
}
}
ConsoleProxyClient viewer = null;
try {
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);
param.setLocale(vm_locale);
viewer = ConsoleProxy.getAjaxVncViewer(param, ajaxSessionIdStr);
} catch(Exception e) {
s_logger.warn("Failed to create viewer due to " + e.getMessage(), e);
String[] content = new String[] {
"<html><head></head><body>",
"<div id=\"main_panel\" tabindex=\"1\">",
"<p>Access is denied for the console session. Please close the window and retry again</p>",
"</div></body></html>"
};
StringBuffer sb = new StringBuffer();
for(int i = 0; i < content.length; i++)
sb.append(content[i]);
sendResponse(t, "text/html", sb.toString());
return;
}
if(event != 0) {
if(ajaxSessionId != 0 && ajaxSessionId == viewer.getAjaxSessionId()) {
if(event == 7) {
// client send over an event bag
InputStream is = t.getRequestBody();
handleClientEventBag(viewer, convertStreamToString(is, true));
} else {
handleClientEvent(viewer, event, queryMap);
}
sendResponse(t, "text/html", "OK");
} else {
if(s_logger.isDebugEnabled())
s_logger.debug("Ajax request comes from a different session, id in request: " + ajaxSessionId + ", id in viewer: " + viewer.getAjaxSessionId());
sendResponse(t, "text/html", "Invalid ajax client session id");
}
} else {
if(ajaxSessionId != 0 && ajaxSessionId != viewer.getAjaxSessionId()) {
s_logger.info("Ajax request comes from a different session, id in request: " + ajaxSessionId + ", id in viewer: " + viewer.getAjaxSessionId());
handleClientKickoff(t, viewer);
} else if(ajaxSessionId == 0) {
if(s_logger.isDebugEnabled())
s_logger.debug("Ajax request indicates a fresh client start");
String title = queryMap.get("t");
String guest = queryMap.get("guest");
handleClientStart(t, viewer, title != null ? title : "", guest);
} else {
if(s_logger.isTraceEnabled())
s_logger.trace("Ajax request indicates client update");
handleClientUpdate(t, viewer);
}
}
}
private static String convertStreamToString(InputStream is, boolean closeStreamAfterRead) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
s_logger.warn("Exception while reading request body: ", e);
} finally {
if(closeStreamAfterRead) {
try {
is.close();
} catch (IOException e) {
}
}
}
return sb.toString();
}
private void sendResponse(HttpExchange t, String contentType, String response) throws IOException {
Headers hds = t.getResponseHeaders();
hds.set("Content-Type", contentType);
t.sendResponseHeaders(200, response.length());
OutputStream os = t.getResponseBody();
try {
os.write(response.getBytes());
} finally {
os.close();
}
}
@SuppressWarnings("deprecation")
private void handleClientEventBag(ConsoleProxyClient viewer, String requestData) {
if(s_logger.isTraceEnabled())
s_logger.trace("Handle event bag, event bag: " + requestData);
int start = requestData.indexOf("=");
if(start < 0)
start = 0;
else if(start > 0)
start++;
String data = URLDecoder.decode(requestData.substring(start));
String[] tokens = data.split("\\|");
if(tokens != null && tokens.length > 0) {
int count = 0;
try {
count = Integer.parseInt(tokens[0]);
int parsePos = 1;
int type, event, x, y, code, modifiers;
for(int i = 0; i < count; i++) {
type = Integer.parseInt(tokens[parsePos++]);
if(type == 1) {
// mouse event
event = Integer.parseInt(tokens[parsePos++]);
x = Integer.parseInt(tokens[parsePos++]);
y = Integer.parseInt(tokens[parsePos++]);
code = Integer.parseInt(tokens[parsePos++]);
modifiers = Integer.parseInt(tokens[parsePos++]);
Map<String, String> queryMap = new HashMap<String, String>();
queryMap.put("event", String.valueOf(event));
queryMap.put("x", String.valueOf(x));
queryMap.put("y", String.valueOf(y));
queryMap.put("code", String.valueOf(code));
queryMap.put("modifier", String.valueOf(modifiers));
handleClientEvent(viewer, event, queryMap);
} else {
// keyboard event
event = Integer.parseInt(tokens[parsePos++]);
code = Integer.parseInt(tokens[parsePos++]);
modifiers = Integer.parseInt(tokens[parsePos++]);
Map<String, String> queryMap = new HashMap<String, String>();
queryMap.put("event", String.valueOf(event));
queryMap.put("code", String.valueOf(code));
queryMap.put("modifier", String.valueOf(modifiers));
handleClientEvent(viewer, event, queryMap);
}
}
} catch(NumberFormatException e) {
s_logger.warn("Exception in handle client event bag: " + data + ", ", e);
} catch(Exception e) {
s_logger.warn("Exception in handle client event bag: " + data + ", ", e);
} catch(OutOfMemoryError e) {
s_logger.error("Unrecoverable OutOfMemory Error, exit and let it be re-launched");
System.exit(1);
}
}
}
private void handleClientEvent(ConsoleProxyClient viewer, int event, Map<String, String> queryMap) {
int code = 0;
int x = 0, y = 0;
int modifiers = 0;
String str;
switch(event) {
case 1: // mouse move
case 2: // mouse down
case 3: // mouse up
case 8: // mouse double click
str = queryMap.get("x");
if(str != null) {
try {
x = Integer.parseInt(str);
} catch (NumberFormatException e) {
s_logger.warn("Invalid number parameter in query string: " + str);
throw new IllegalArgumentException(e);
}
}
str = queryMap.get("y");
if(str != null) {
try {
y = Integer.parseInt(str);
} catch (NumberFormatException e) {
s_logger.warn("Invalid number parameter in query string: " + str);
throw new IllegalArgumentException(e);
}
}
if(event != 1) {
str = queryMap.get("code");
try {
code = Integer.parseInt(str);
} catch (NumberFormatException e) {
s_logger.warn("Invalid number parameter in query string: " + str);
throw new IllegalArgumentException(e);
}
str = queryMap.get("modifier");
try {
modifiers = Integer.parseInt(str);
} catch (NumberFormatException e) {
s_logger.warn("Invalid number parameter in query string: " + str);
throw new IllegalArgumentException(e);
}
if(s_logger.isTraceEnabled())
s_logger.trace("Handle client mouse event. event: " + event + ", x: " + x + ", y: " + y + ", button: " + code + ", modifier: " + modifiers);
} else {
if(s_logger.isTraceEnabled())
s_logger.trace("Handle client mouse move event. x: " + x + ", y: " + y);
}
viewer.sendClientMouseEvent(InputEventType.fromEventCode(event), x, y, code, modifiers);
break;
case 4: // key press
case 5: // key down
case 6: // key up
str = queryMap.get("code");
try {
code = Integer.parseInt(str);
} catch (NumberFormatException e) {
s_logger.warn("Invalid number parameter in query string: " + str);
throw new IllegalArgumentException(e);
}
str = queryMap.get("modifier");
try {
modifiers = Integer.parseInt(str);
} catch (NumberFormatException e) {
s_logger.warn("Invalid number parameter in query string: " + str);
throw new IllegalArgumentException(e);
}
if(s_logger.isDebugEnabled())
s_logger.debug("Handle client keyboard event. event: " + event + ", code: " + code + ", modifier: " + modifiers);
viewer.sendClientRawKeyboardEvent(InputEventType.fromEventCode(event), code, modifiers);
break;
default :
break;
}
}
private void handleClientKickoff(HttpExchange t, ConsoleProxyClient viewer) throws IOException {
String response = viewer.onAjaxClientKickoff();
t.sendResponseHeaders(200, response.length());
OutputStream os = t.getResponseBody();
try {
os.write(response.getBytes());
} finally {
os.close();
}
}
private void handleClientStart(HttpExchange t, ConsoleProxyClient viewer, String title, String guest) throws IOException {
List<String> languages = t.getRequestHeaders().get("Accept-Language");
String response = viewer.onAjaxClientStart(title, languages, guest);
Headers hds = t.getResponseHeaders();
hds.set("Content-Type", "text/html");
hds.set("Cache-Control", "no-cache");
hds.set("Cache-Control", "no-store");
t.sendResponseHeaders(200, response.length());
OutputStream os = t.getResponseBody();
try {
os.write(response.getBytes());
} finally {
os.close();
}
}
private void handleClientUpdate(HttpExchange t, ConsoleProxyClient viewer) throws IOException {
String response = viewer.onAjaxClientUpdate();
Headers hds = t.getResponseHeaders();
hds.set("Content-Type", "text/javascript");
t.sendResponseHeaders(200, response.length());
OutputStream os = t.getResponseBody();
try {
os.write(response.getBytes());
} finally {
os.close();
}
}
}