/*
    * Copyright 2009 Red Hat, Inc.
    *
    * Red Hat licenses this file to you under the Apache License, version 2.0
    * (the "License"); you may not use this file except in compliance with the
    * License.  You may obtain a copy of the License at:
    *
    *    http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations
   * under the License.
   */
  package org.jboss.netty.example.http.upload;
  
  import org.jboss.netty.buffer.ChannelBuffer;
  import org.jboss.netty.channel.ChannelHandlerContext;
  import org.jboss.netty.channel.ExceptionEvent;
  import org.jboss.netty.channel.MessageEvent;
  import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
  import org.jboss.netty.handler.codec.http2.HttpChunk;
  import org.jboss.netty.handler.codec.http2.HttpResponse;
  import org.jboss.netty.util.CharsetUtil;
  
  /**
   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
   * @author Andy Taylor (andy.taylor@jboss.org)
   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
   * @author <a href="http://openr66.free.fr/">Frederic Bregier</a>
   *
   * @version $Rev: 612 $, $Date: 2010-11-11 19:35:43 +0100 (jeu., 11 nov. 2010) $
   */
  public class HttpResponseHandler extends SimpleChannelUpstreamHandler {
  
      private volatile boolean readingChunks;
  
  	@Override
      public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
          if (!readingChunks) {
              HttpResponse response = (HttpResponse) e.getMessage();
  
              System.out.println("STATUS: " + response.getStatus());
              System.out.println("VERSION: " + response.getProtocolVersion());
              System.out.println();
  
              if (!response.getHeaderNames().isEmpty()) {
                  for (String name: response.getHeaderNames()) {
                      for (String value: response.getHeaders(name)) {
                          System.out.println("HEADER: " + name + " = " + value);
                      }
                  }
                  System.out.println();
              }
  
              if (response.getStatus().getCode() == 200 && response.isChunked()) {
                  readingChunks = true;
                  System.out.println("CHUNKED CONTENT {");
              } else {
                  ChannelBuffer content = response.getContent();
                  if (content.readable()) {
                      System.out.println("CONTENT {");
                      System.out.println(content.toString(CharsetUtil.UTF_8));
                      System.out.println("} END OF CONTENT");
                  }
              }
          } else {
              HttpChunk chunk = (HttpChunk) e.getMessage();
              if (chunk.isLast()) {
                  readingChunks = false;
                  System.out.println("} END OF CHUNKED CONTENT");
              } else {
                  System.out.print(chunk.getContent().toString(CharsetUtil.UTF_8));
                  System.out.flush();
              }
          }
      }
  
      @Override
      public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e)
              throws Exception {
          e.getCause().printStackTrace();
          e.getChannel().close();
      }
  }