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Move to clipboard state tracking, rather than events.

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This commit is contained in:
Michael Jumper
2014-03-02 19:26:15 -08:00
parent fb1bc0f5e4
commit 2a178d11fc
5 changed files with 57 additions and 105 deletions
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24
guacamole/src/main/java/org/glyptodon/guacamole/net/basic/AuthenticatingHttpServlet.java
View File

@@ -80,6 +80,11 @@ public abstract class AuthenticatingHttpServlet extends HttpServlet {
*/
public static final String CREDENTIALS_ATTRIBUTE = "GUAC_CREDS";
/**
* The session attribute holding the session-scoped clipboard storage.
*/
public static final String CLIPBOARD_ATTRIBUTE = "GUAC_CLIP";
/**
* The AuthenticationProvider to use to authenticate all requests.
*/
@@ -218,6 +223,25 @@ public abstract class AuthenticatingHttpServlet extends HttpServlet {
return (UserContext) session.getAttribute(CONTEXT_ATTRIBUTE);
}
/**
* Returns the ClipboardState associated with the given session. If none
* exists yet, one is created.
*
* @param session The session to retrieve the ClipboardState from.
* @return The ClipboardState associated with the given session.
*/
public static ClipboardState getClipboardState(HttpSession session) {
ClipboardState clipboard = (ClipboardState) session.getAttribute(CLIPBOARD_ATTRIBUTE);
if (clipboard == null) {
clipboard = new ClipboardState();
session.setAttribute(CLIPBOARD_ATTRIBUTE, clipboard);
}
return clipboard;
}
/**
* Returns whether the request given has updated credentials. If this
* function returns false, the UserContext will not be updated.

5
guacamole/src/main/java/org/glyptodon/guacamole/net/basic/BasicTunnelRequestUtility.java
View File

@@ -243,6 +243,9 @@ public class BasicTunnelRequestUtility {
if (context == null || credentials == null)
throw new GuacamoleSecurityException("Cannot connect - user not logged in.");
// Get clipboard
final ClipboardState clipboard = AuthenticatingHttpServlet.getClipboardState(httpSession);
// Get client information
GuacamoleClientInformation info = new GuacamoleClientInformation();
@@ -327,7 +330,7 @@ public class BasicTunnelRequestUtility {
@Override
public GuacamoleReader acquireReader() {
// Monitor instructions which pertain to server-side events
return new MonitoringGuacamoleReader(listeners, super.acquireReader());
return new MonitoringGuacamoleReader(clipboard, super.acquireReader());
}
@Override

42
guacamole/src/main/java/org/glyptodon/guacamole/net/basic/event/ClipboardChangeEvent.java → guacamole/src/main/java/org/glyptodon/guacamole/net/basic/ClipboardState.java
View File

@@ -1,16 +1,16 @@
/*
* Copyright (C) 2013 Glyptodon LLC
*
* Copyright (C) 2014 Glyptodon LLC.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
@@ -20,32 +20,36 @@
* THE SOFTWARE.
*/
package org.glyptodon.guacamole.net.basic.event;
package org.glyptodon.guacamole.net.basic;
/**
* An event which is triggered whenever new clipboard data is received.
*
* Provides central storage for a cross-connection clipboard state. This
* clipboard state is shared only for a single HTTP session. Multiple HTTP
* sessions will all have their own state.
*
* @author Michael Jumper
*/
public class ClipboardChangeEvent {
public class ClipboardState {
/**
* The new clipboard data.
* The current contents.
*/
private final String data;
private String contents = "";
/**
* Creates a new ClipboardChangeEvent which represents the changing of
* clipboard contents (or, rather, the receipt of new clipboard contents).
*
* @param data The new clipboard contents.
* Returns the current clipboard contents.
* @return The current clipboard contents
*/
public ClipboardChangeEvent(String data) {
this.data = data;
public String getContents() {
return contents;
}
public String getData() {
return data;
/**
* Sets the current clipboard contents.
* @param contents The contents to assign to the clipboard.
*/
public void setContents(String contents) {
this.contents = contents;
}
}

41
guacamole/src/main/java/org/glyptodon/guacamole/net/basic/MonitoringGuacamoleReader.java
View File

@@ -22,18 +22,14 @@
package org.glyptodon.guacamole.net.basic;
import java.util.Collection;
import java.util.List;
import org.glyptodon.guacamole.GuacamoleException;
import org.glyptodon.guacamole.io.GuacamoleReader;
import org.glyptodon.guacamole.net.basic.event.ClipboardChangeEvent;
import org.glyptodon.guacamole.net.basic.event.SessionListenerCollection;
import org.glyptodon.guacamole.net.basic.event.listener.ClipboardChangeListener;
import org.glyptodon.guacamole.protocol.GuacamoleInstruction;
/**
* GuacamoleReader implementation which watches for specific instructions,
* firing server-side events when they are observed.
* maintaining state based on the observed instructions.
*
* @author Michael Jumper
*/
@@ -47,44 +43,19 @@ public class MonitoringGuacamoleReader implements GuacamoleReader {
/**
* Collection of all listeners which will receive events.
*/
private final SessionListenerCollection listeners;
/**
* Notifies all listeners in the given collection that clipboard data has
* changed.
*
* @param listeners A collection of all listeners that should be notified.
* @param data The new clipboard data.
* @throws GuacamoleException If any listener throws an error while being
* notified.
*/
private static boolean notifyClipboardChange(Collection listeners, String data)
throws GuacamoleException {
// Build event for clipboard change
ClipboardChangeEvent event = new ClipboardChangeEvent(data);
// Notify all listeners
for (Object listener : listeners) {
if (listener instanceof ClipboardChangeListener)
((ClipboardChangeListener) listener).clipboardChanged(event);
}
return true;
}
private final ClipboardState clipboard;
/**
* Creates a new MonitoringGuacamoleReader which watches the instructions
* read by the given GuacamoleReader, firing events when specific
* instructions are seen.
*
* @param listeners The collection of listeners receiving events.
* @param clipboard The clipboard state to maintain.
* @param reader The reader to observe.
*/
public MonitoringGuacamoleReader(SessionListenerCollection listeners,
public MonitoringGuacamoleReader(ClipboardState clipboard,
GuacamoleReader reader) {
this.listeners = listeners;
this.clipboard = clipboard;
this.reader = reader;
}
@@ -107,7 +78,7 @@ public class MonitoringGuacamoleReader implements GuacamoleReader {
if (instruction.getOpcode().equals("clipboard")) {
List<String> args = instruction.getArgs();
if (args.size() >= 1)
notifyClipboardChange(listeners, args.get(0));
clipboard.setContents(args.get(0));
}
return instruction;

50
guacamole/src/main/java/org/glyptodon/guacamole/net/basic/event/listener/ClipboardChangeListener.java
View File

@@ -1,50 +0,0 @@
/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.glyptodon.guacamole.net.basic.event.listener;
import org.glyptodon.guacamole.GuacamoleException;
import org.glyptodon.guacamole.net.basic.event.ClipboardChangeEvent;
/**
* A listener whose clipboardChanged() hook will fire immediately after
* clipboard data is received.
*
* @author Michael Jumper
*/
public interface ClipboardChangeListener {
/**
* Event hook which fires immediately after an existing tunnel is closed.
* The return value of this hook dictates whether the tunnel is allowed to
* be closed.
*
* @param e The TunnelCloseEvent describing the tunnel being closed and
* any associated credentials.
* @throws GuacamoleException If an error occurs while handling the
* tunnel close event. Throwing an exception
* will also stop the tunnel from being closed.
*/
void clipboardChanged(ClipboardChangeEvent e)
throws GuacamoleException;
}