//
   //  ========================================================================
   //  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
   //  ------------------------------------------------------------------------
   //  All rights reserved. This program and the accompanying materials
   //  are made available under the terms of the Eclipse Public License v1.0
   //  and Apache License v2.0 which accompanies this distribution.
   //
   //      The Eclipse Public License is available at
  //      http://www.eclipse.org/legal/epl-v10.html
  //
  //      The Apache License v2.0 is available at
  //      http://www.opensource.org/licenses/apache2.0.php
  //
  //  You may elect to redistribute this code under either of these licenses.
  //  ========================================================================
  //
  
  package org.eclipse.jetty.client.http;
  
  import java.util.Enumeration;
  
  import org.eclipse.jetty.client.HttpChannel;
  import org.eclipse.jetty.client.HttpExchange;
  import org.eclipse.jetty.client.api.Result;
  import org.eclipse.jetty.http.HttpFields;
  import org.eclipse.jetty.http.HttpHeader;
  import org.eclipse.jetty.http.HttpHeaderValue;
  
  public class HttpChannelOverHTTP extends HttpChannel
  {
      private final HttpConnectionOverHTTP connection;
      private final HttpSenderOverHTTP sender;
      private final HttpReceiverOverHTTP receiver;
  
      public HttpChannelOverHTTP(HttpConnectionOverHTTP connection)
      {
          super(connection.getHttpDestination());
          this.connection = connection;
          this.sender = new HttpSenderOverHTTP(this);
          this.receiver = new HttpReceiverOverHTTP(this);
      }
  
      public HttpConnectionOverHTTP getHttpConnection()
      {
          return connection;
      }
  
      @Override
      public void send()
      {
          HttpExchange exchange = getHttpExchange();
          if (exchange != null)
              sender.send(exchange);
      }
  
      @Override
      public void proceed(HttpExchange exchange, boolean proceed)
      {
          sender.proceed(exchange, proceed);
      }
  
      @Override
      public boolean abort(Throwable cause)
      {
          // We want the return value to be that of the response
          // because if the response has already successfully
          // arrived then we failed to abort the exchange
          sender.abort(cause);
          return receiver.abort(cause);
      }
  
      public void receive()
      {
          receiver.receive();
      }
  
      @Override
      public void exchangeTerminated(Result result)
      {
          super.exchangeTerminated(result);
  
          if (result.isSucceeded())
          {
              HttpFields responseHeaders = result.getResponse().getHeaders();
              Enumeration<String> values = responseHeaders.getValues(HttpHeader.CONNECTION.asString(), ",");
              if (values != null)
              {
                  while (values.hasMoreElements())
                  {
                      if (HttpHeaderValue.CLOSE.asString().equalsIgnoreCase(values.nextElement()))
                      {
                          connection.close();
                          return;
                      }
                  }
              }
              connection.release();
          }
         else
         {
             connection.close();
         }
     }
 
     @Override
     public String toString()
     {
         return String.format("%s@%x", getClass().getSimpleName(), hashCode());
     }
 }