content: /*
   * 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;
  
  import java.io.IOException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.servlet.http.HttpSession;
  import org.glyptodon.guacamole.GuacamoleException;
  import org.glyptodon.guacamole.GuacamoleServerException;
  import org.glyptodon.guacamole.GuacamoleUnsupportedException;
  import org.glyptodon.guacamole.net.auth.UserContext;
  import org.glyptodon.guacamole.properties.BooleanGuacamoleProperty;
  import org.glyptodon.guacamole.properties.GuacamoleProperties;
  
  /**
   * Servlet which dumps the current contents of the clipboard.
   *
   * @author Michael Jumper
   */
  public class CaptureClipboard extends AuthenticatingHttpServlet {
  
      /**
       * The amount of time to wait for clipboard changes, in milliseconds.
       */
      private static final int CLIPBOARD_TIMEOUT = 250;
  
      /**
       * Whether clipboard integration is enabled.
       */
      public static final BooleanGuacamoleProperty INTEGRATION_ENABLED = new BooleanGuacamoleProperty() {
  
          @Override
          public String getName() { return "enable-clipboard-integration"; }
  
      };
  
  
      @Override
      protected void authenticatedService(
              UserContext context,
              HttpServletRequest request, HttpServletResponse response)
      throws GuacamoleException {
  
          // Only bother if actually enabled
          if (GuacamoleProperties.getProperty(INTEGRATION_ENABLED, false)) {
          
              // Get clipboard
              final HttpSession session = request.getSession(true);
              final ClipboardState clipboard = getClipboardState(session);
  
              // Send clipboard contents
              try {
                  synchronized (clipboard) {
                      clipboard.waitForContents(CLIPBOARD_TIMEOUT);
                      response.setContentType(clipboard.getMimetype());
                      response.getOutputStream().write(clipboard.getContents());
                  }
              }
              catch (IOException e) {
                  throw new GuacamoleServerException("Unable to send clipboard contents", e);
              }
  
          }
  
          // Otherwise, inform not supported
          else
              throw new GuacamoleUnsupportedException("Clipboard integration not supported");
  
      }
  
  }
  