/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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.helloworld;
import static org.jboss.netty.handler.codec.http.HttpHeaders.is100ContinueExpected;
import static org.jboss.netty.handler.codec.http.HttpHeaders.isKeepAlive;
import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONNECTION;
import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONTENT_LENGTH;
import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TYPE;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.CONTINUE;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.OK;
import static org.jboss.netty.handler.codec.http.HttpVersion.HTTP_1_1;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelFuture;
import org.jboss.netty.channel.ChannelFutureListener;
import org.jboss.netty.channel.ChannelHandler.Sharable;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.Channels;
import org.jboss.netty.channel.ExceptionEvent;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpHeaders;
import org.jboss.netty.handler.codec.http.HttpHeaders.Values;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponse;
@Sharable
public class HttpHelloWorldServerHandler extends SimpleChannelUpstreamHandler
{
private static final byte[] CONTENT = "Hello World".getBytes();
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception
{
Object msg = e.getMessage();
Channel ch = e.getChannel();
if (msg instanceof HttpRequest)
{
HttpRequest req = (HttpRequest) msg;
if (is100ContinueExpected(req))
{
Channels.write(ctx, Channels.future(ch), new DefaultHttpResponse(HTTP_1_1, CONTINUE));
}
boolean keepAlive = isKeepAlive(req);
HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
HttpHeaders hh = response.headers();
response.setContent(ChannelBuffers.wrappedBuffer(CONTENT));
hh.set(CONTENT_TYPE, "text/plain");
hh.set(CONTENT_LENGTH, CONTENT.length);
if (!keepAlive)
{
ChannelFuture f = Channels.future(ch);
f.addListener(ChannelFutureListener.CLOSE);
Channels.write(ctx, f, response);
}
else
{
hh.set(CONNECTION, Values.KEEP_ALIVE);
Channels.write(ctx, Channels.future(ch), response);
}
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception
{
// e.getCause().printStackTrace();
e.getChannel().close();
}
}