pserverinterface.java

这是一个用java和xml编写的流媒体服务器管理软件

/*
 * ====================================================================
 * The Vovida Software License, Version 1.0
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in
 * the documentation and/or other materials provided with the
 * distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 * and "Vovida Open Communication Application Library (VOCAL)" must
 * not be used to endorse or promote products derived from this
 * software without prior written permission. For written
 * permission, please contact [e-mail].
 * 
 * 4. Products derived from this software may not be called "VOCAL", nor
 * may "VOCAL" appear in their name, without prior written
 * permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
 * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
 * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 * 
 */

package vocal.userEditor;

import vocal.comm.VPPTransactionWrapper;
import vocal.comm.VPPException;
import vocal.comm.VPPNoSuchFileException;
import vocal.data.XMLUtils;
import vocal.util.Logger;

import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Document;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.xml.sax.helpers.DefaultHandler;

import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.Vector;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.StringReader;
import java.net.ConnectException;

public class PServerInterface
{
  private VPPTransactionWrapper connection = null;
  private DocumentBuilder parser = null;
  private Hashtable featureGroups = null;
  private Hashtable groupServers = null;
  private String[] marshalTypes = null;


  public PServerInterface(VPPTransactionWrapper con)
  {
    connection = con;
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    try
    {
      parser = dbf.newDocumentBuilder();
    }
    catch(ParserConfigurationException e)
    {
      e.printStackTrace();
    }
  }


  public PServerInterface(String aHost, int aPort) throws VPPException
  {
    connection = new VPPTransactionWrapper(aHost, aPort);
  }

  public void deleteUser(String name) throws VPPNoSuchFileException
  {
    try
    {
      connection.request("DELETEUSER", name, "");
    }
    catch (VPPException ex)
    {
      if (VPPNoSuchFileException.class.isInstance(ex))
      {
        throw (VPPNoSuchFileException) ex;
      }
      else
      {
        connection.showVPPException(ex, "");
      }
    }
  }

  public void deleteAdmin(String name) throws VPPNoSuchFileException
  {
    try
    {
      connection.request("REMOVE", "Admin_Accounts", name);
    }
    catch (VPPException ex)
    {
      if (VPPNoSuchFileException.class.isInstance(ex))
      {
        throw (VPPNoSuchFileException) ex;
      }
      else
      {
        connection.showVPPException(ex, "");
      }
    }
  }

  public void saveUser(String name, Document doc)
  {
    String xml = new XMLUtils().buildXMLString(doc);

    try
    {
      connection.doPut("Accounts", name, xml);
    }
    catch (VPPException e)
    {
      connection.showVPPException(e, "");
    }
  }

  public void AccreditUser(String name, String groupname)
  {
    //String xml = new XMLUtils().buildXMLString(doc);

    try
    {
      connection.doSubPut("Accounts", name, groupname);
    }
    catch (VPPException e)
    {
      connection.showVPPException(e, "");
    }
  }
  
  /**
   * Pass through for doPut. <p>
   */
  public void put(String group, String filename, String data)
  {
    try
    {
      connection.doPut(group, filename, data);
    }
    catch (VPPException e)
    {
      connection.showVPPException(e, "");
    }
  }

  public String get(String group, 
                    String filename) throws VPPNoSuchFileException
  {
    try
    {
      return connection.doGet(group, filename);
    }
    catch (VPPException ex)
    {
      if (VPPNoSuchFileException.class.isInstance(ex))
      {
        throw (VPPNoSuchFileException) ex;
      }
      else
      {
        connection.showVPPException(ex, "");
      }
    }

    return "";
  }

  private Document getAccountNamed(String group, 
          String filename) throws VPPException, IOException, SAXException
  {
    BufferedReader user = connection.request("GET", group, filename);

    return parser.parse(new InputSource(user));

  }


  public Document getAdminNamed(String name) 
    throws VPPException, IOException, SAXException
  {
    return getAccountNamed("Admin_Accounts", name);
  }

  /**
   * Retrieve the xml file for a user with the given name and parse it.
   */
  public Document getUserNamed(String name) 
    throws VPPException, IOException, SAXException
  {
    return getAccountNamed("Accounts", name);
  }

  public String[] getAllAdminNames() throws VPPNoSuchFileException
  {
    return getAllNames("Admin_Accounts");
  }

  public String[] getAllAliasNames() throws VPPNoSuchFileException
  {
    return getAllNames("Aliases");
  }

  public String getAliasNamed(String alias) throws VPPNoSuchFileException
  {
    try
    {
      return connection.doGet("Aliases", alias);
    }
    catch (VPPException ex)
    {
      if (VPPNoSuchFileException.class.isInstance(ex))
      {
        throw (VPPNoSuchFileException) ex;
      }
      else
      {
        connection.showVPPException(ex, "");
      }
    }

    return "";
  }

  private String[] getAllNames(String group) throws VPPNoSuchFileException
  {
    String[] names = new String[]{};

    Logger.swingLog("Downloading list of user names from server ...");


    String fileList = null;

    try
    {
      fileList = connection.requestString("NLIST", group, "");
    }
    catch (VPPException ex)
    {
      if (VPPNoSuchFileException.class.isInstance(ex))
      {
        Logger.swingLog("No names found");

        throw (VPPNoSuchFileException) ex;
      }
      else
      {
        connection.showVPPException(ex, "");
      }
    }

    if (fileList == null)
    {
      return names;
    }

    if (fileList.charAt(fileList.length() - 1) == '\n')
    {
      fileList = fileList.substring(0, Math.max(0, fileList.length() - 2));
    }

    if (fileList.length() == 0)
    {
      Logger.swingLog("No names found");

      return names;
    }

    Logger.swingLog("Starting to tokenize user name list ...");

    StringTokenizer tokenizer = new StringTokenizer(fileList, ",", false);

    Vector namesTemp = new Vector();
    String name;

    while (tokenizer.hasMoreTokens())
    {
      name = tokenizer.nextToken();

      namesTemp.addElement(name);
    }

    Logger.swingLog("Done tokenizing user name list ...");

    names = new String[namesTemp.size()];

    namesTemp.copyInto(names);

    Logger.swingLog("Starting to sort user name list ...");

    java.util.Arrays.sort(names);

    Logger.swingLog("Done sorting ");

    return names;
  }

  /**
   * Retrieve a directory listing for all the /Accounts/ dir to get a list of
   * the names of all the users.
   */
  public String[] getAllUserNames() throws VPPNoSuchFileException
  {
    return getAllNames("Accounts");
  }

  public String[] getMarshalGroups() 
    throws VPPNoSuchFileException, IOException, SAXException
  {
    if (marshalTypes == null)
    {
      String filegroup = "SystemConfiguration";
      String filename = "ListOfMarshalServers";

      try
      {
        BufferedReader configInfo = connection.request("GET", filegroup, 
                filename);

        Document doc = parser.parse(new InputSource(configInfo));


        NodeList marshals = doc.getElementsByTagName("serverType");

        if (marshals.getLength() == 0)
        {
          throw new FileNotFoundException("There are no marshal servers defined in " 
                  + filegroup + " " + filename);
        }

        for (int i = 0; i < marshals.getLength(); i++)
        {
          Element marshal = (Element) marshals.item(i);
          String type = marshal.getAttribute("value");

          if (type.equals("UserAgent"))
          {
            NodeList groups = marshal.getElementsByTagName("serverGroup");

            marshalTypes = new String[groups.getLength()];

            for (int j = 0; j < groups.getLength(); j++)
            {
              Element group = (Element) groups.item(j);
              String name = group.getAttribute("value");

              marshalTypes[j] = name;
            }
          }
        }
      }
      catch (VPPException ex)
      {
        if (VPPNoSuchFileException.class.isInstance(ex))
        {
          throw new VPPNoSuchFileException("Could not load file " + filegroup 
                  + " " + filename + "\n\nbecause:\n\n" + ex.getMessage());
        }
        else
        {
          connection.showVPPException(ex, "");
        }
      }
    }

    if ((marshalTypes == null) || (marshalTypes.length == 0))