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Added tunnel registry and support for multiple tunnels per session.

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This commit is contained in:
Michael Jumper
2011-04-08 16:28:12 -07:00
parent a52476de05
commit c020565397
3 changed files with 109 additions and 100 deletions
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97
guacamole-common/src/main/java/net/sourceforge/guacamole/net/GuacamoleSession.java
View File

@@ -19,54 +19,16 @@ package net.sourceforge.guacamole.net;
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.util.concurrent.locks.ReentrantLock;
import net.sourceforge.guacamole.net.tunnel.GuacamoleTunnel;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
import net.sourceforge.guacamole.GuacamoleClient;
import net.sourceforge.guacamole.GuacamoleTCPClient;
import net.sourceforge.guacamole.GuacamoleException;
public class GuacamoleSession {
private final HttpSession session;
private SessionClient client;
private ReentrantLock instructionStreamLock;
public class SessionClient extends GuacamoleClient implements HttpSessionBindingListener {
private GuacamoleClient client;
public SessionClient(GuacamoleClient client) {
this.client = client;
}
public void valueBound(HttpSessionBindingEvent event) {
// Do nothing
}
public void valueUnbound(HttpSessionBindingEvent event) {
try {
disconnect();
}
catch (GuacamoleException e) {
// Ignore
}
}
public void write(char[] data, int off, int len) throws GuacamoleException {
client.write(data, off, len);
}
public char[] read() throws GuacamoleException {
return client.read();
}
public void disconnect() throws GuacamoleException {
client.disconnect();
}
}
private ConcurrentMap<String, GuacamoleTunnel> tunnels;
public GuacamoleSession(HttpSession session) throws GuacamoleException {
@@ -77,57 +39,30 @@ public class GuacamoleSession {
synchronized (session) {
client = (SessionClient) session.getAttribute("CLIENT");
instructionStreamLock = (ReentrantLock) session.getAttribute("INSTRUCTION_STREAM_LOCK");
tunnels = (ConcurrentMap<String, GuacamoleTunnel>) session.getAttribute("GUAC_TUNNELS");
if (tunnels == null) {
tunnels = new ConcurrentHashMap<String, GuacamoleTunnel>();
session.setAttribute("GUAC_TUNNELS", tunnels);
}
}
public void attachClient(GuacamoleTCPClient client) throws GuacamoleException {
synchronized (session) {
this.client = new SessionClient(client);
session.setAttribute("CLIENT", this.client);
instructionStreamLock = new ReentrantLock();
session.setAttribute("INSTRUCTION_STREAM_LOCK", instructionStreamLock);
}
}
public SessionClient getClient() throws GuacamoleException {
synchronized (session) {
if (client == null)
throw new GuacamoleException("Client not yet attached.");
return client;
}
}
public void invalidate() {
session.invalidate();
}
public void detachClient() throws GuacamoleException {
public void attachTunnel(GuacamoleTunnel tunnel) throws GuacamoleException {
tunnels.put(tunnel.getUUID().toString(), tunnel);
}
synchronized (session) {
public void detachTunnel(GuacamoleTunnel tunnel) throws GuacamoleException {
tunnels.remove(tunnel.getUUID().toString());
}
if (client != null) {
client.disconnect();
session.removeAttribute("CLIENT");
client = null;
}
}
}
public ReentrantLock getInstructionStreamLock() {
return instructionStreamLock;
public GuacamoleTunnel getTunnel(String tunnelUUID) {
return tunnels.get(tunnelUUID);
}
}

53
guacamole-common/src/main/java/net/sourceforge/guacamole/net/tunnel/GuacamoleTunnel.java Normal file
View File

@@ -0,0 +1,53 @@
package net.sourceforge.guacamole.net.tunnel;
/*
* Guacamole - Clientless Remote Desktop
* Copyright (C) 2010 Michael Jumper
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.util.UUID;
import java.util.concurrent.locks.ReentrantLock;
import net.sourceforge.guacamole.GuacamoleClient;
import net.sourceforge.guacamole.GuacamoleException;
public class GuacamoleTunnel {
private UUID uuid;
private GuacamoleClient client;
private ReentrantLock instructionStreamLock;
public GuacamoleTunnel(GuacamoleClient client) throws GuacamoleException {
this.client = client;
instructionStreamLock = new ReentrantLock();
uuid = UUID.randomUUID();
}
public GuacamoleClient getClient() throws GuacamoleException {
return client;
}
public ReentrantLock getInstructionStreamLock() {
return instructionStreamLock;
}
public UUID getUUID() {
return uuid;
}
}

47
guacamole-common/src/main/java/net/sourceforge/guacamole/net/tunnel/GuacamoleTunnelServlet.java
View File

@@ -54,14 +54,25 @@ public abstract class GuacamoleTunnelServlet extends HttpServlet {
if (query == null)
throw new GuacamoleException("No query string provided.");
if (query.equals("connect"))
doConnect(request, response);
if (query.equals("connect")) {
else if(query.equals("read"))
doRead(request, response);
GuacamoleTunnel tunnel = doConnect(request);
if (tunnel != null) {
try {
response.getWriter().println(tunnel.getUUID().toString());
}
catch (IOException e) {
throw new GuacamoleException(e);
}
}
else if(query.equals("write"))
doWrite(request, response);
}
else if(query.startsWith("read:"))
doRead(request, response, query.substring(5));
else if(query.startsWith("write:"))
doWrite(request, response, query.substring(6));
else
throw new GuacamoleException("Invalid tunnel operation: " + query);
@@ -72,14 +83,18 @@ public abstract class GuacamoleTunnelServlet extends HttpServlet {
}
protected abstract void doConnect(HttpServletRequest request, HttpServletResponse response) throws GuacamoleException;
protected abstract GuacamoleTunnel doConnect(HttpServletRequest request) throws GuacamoleException;
protected void doRead(HttpServletRequest request, HttpServletResponse response) throws GuacamoleException {
protected void doRead(HttpServletRequest request, HttpServletResponse response, String tunnelUUID) throws GuacamoleException {
HttpSession httpSession = request.getSession(false);
GuacamoleSession session = new GuacamoleSession(httpSession);
ReentrantLock instructionStreamLock = session.getInstructionStreamLock();
GuacamoleTunnel tunnel = session.getTunnel(tunnelUUID);
if (tunnel == null)
throw new GuacamoleException("No such tunnel.");
ReentrantLock instructionStreamLock = tunnel.getInstructionStreamLock();
instructionStreamLock.lock();
try {
@@ -94,7 +109,7 @@ public abstract class GuacamoleTunnelServlet extends HttpServlet {
try {
// Query new update from server
GuacamoleClient client = session.getClient();
GuacamoleClient client = tunnel.getClient();
// For all messages, until another stream is ready (we send at least one message)
char[] message;
@@ -112,7 +127,7 @@ public abstract class GuacamoleTunnelServlet extends HttpServlet {
}
if (message == null) {
session.detachClient();
session.detachTunnel(tunnel);
throw new GuacamoleException("Disconnected.");
}
@@ -141,11 +156,15 @@ public abstract class GuacamoleTunnelServlet extends HttpServlet {
}
protected void doWrite(HttpServletRequest request, HttpServletResponse response) throws GuacamoleException {
protected void doWrite(HttpServletRequest request, HttpServletResponse response, String tunnelUUID) throws GuacamoleException {
HttpSession httpSession = request.getSession(false);
GuacamoleSession session = new GuacamoleSession(httpSession);
GuacamoleTunnel tunnel = session.getTunnel(tunnelUUID);
if (tunnel == null)
throw new GuacamoleException("No such tunnel.");
// We still need to set the content type to avoid the default of
// text/html, as such a content type would cause some browsers to
// attempt to parse the result, even though the JavaScript client
@@ -156,12 +175,14 @@ public abstract class GuacamoleTunnelServlet extends HttpServlet {
// Send data
try {
GuacamoleClient client = tunnel.getClient();
Reader input = request.getReader();
char[] buffer = new char[8192];
int length;
while ((length = input.read(buffer, 0, buffer.length)) != -1)
session.getClient().write(buffer, 0, length);
client.write(buffer, 0, length);
}
catch (IOException e) {