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.crud.users;
  
  import java.io.IOException;
  import java.util.Set;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.xml.stream.XMLOutputFactory;
  import javax.xml.stream.XMLStreamException;
  import javax.xml.stream.XMLStreamWriter;
  import org.glyptodon.guacamole.GuacamoleException;
  import org.glyptodon.guacamole.GuacamoleServerException;
  import org.glyptodon.guacamole.net.auth.Directory;
  import org.glyptodon.guacamole.net.auth.User;
  import org.glyptodon.guacamole.net.auth.UserContext;
  import org.glyptodon.guacamole.net.basic.AuthenticatingHttpServlet;
  
  /**
   * Simple HttpServlet which outputs XML containing a list of all visible users.
   *
   * @author Michael Jumper
   */
  public class List extends AuthenticatingHttpServlet {
  
      @Override
      protected void authenticatedService(
              UserContext context,
              HttpServletRequest request, HttpServletResponse response)
      throws GuacamoleException {
  
          // Do not cache
          response.setHeader("Cache-Control", "no-cache");
  
          // Write XML content type
          response.setHeader("Content-Type", "text/xml");
          
          // Set encoding
          response.setCharacterEncoding("UTF-8");
  
          // Write actual XML
          try {
  
              // Get user directory
              Directory<String, User> directory = context.getUserDirectory();
  
              // Get users
              Set<String> users = directory.getIdentifiers();
  
              XMLOutputFactory outputFactory = XMLOutputFactory.newInstance();
              XMLStreamWriter xml = outputFactory.createXMLStreamWriter(response.getWriter());
  
              // Begin document
              xml.writeStartDocument();
              xml.writeStartElement("users");
  
              // For each entry, write corresponding user element
              for (String username : users) {
  
                  // Get user
                  User user = directory.get(username);
  
                  // Write user
                  xml.writeEmptyElement("user");
                  xml.writeAttribute("name", user.getUsername());
  
              }
  
              // End document
              xml.writeEndElement();
              xml.writeEndDocument();
  
          }
          catch (XMLStreamException e) {
              throw new GuacamoleServerException(
                      "Unable to write configuration list XML.", e);
          }
          catch (IOException e) {
              throw new GuacamoleServerException(
                      "I/O error writing configuration list XML.", e);
          }
  
      }
  
  }
  
  