/*
* 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 io.netty.example.http.websocketx.html5;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpRequestDecoder;
import io.netty.handler.codec.http.HttpResponseEncoder;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
/**
* A WebSocket Server that respondes to requests at:
*
* <pre>
* http://localhost:8080/websocket
* </pre>
*
* The example differs from many of the other examples in Netty in that is does
* not have an acomponying client. Instead a html page is provided that
* interacts with this server. <br>
* Open up the following file a web browser that supports WebSocket's:
*
* <pre>
* example/src/main/resources/websocketx/html5/websocket.html
* </pre>
*
* The html page is very simple were you simply enter some text and the server
* will echo the same text back, but in uppercase. You, also see getStatus messages
* in the "Response From Server" area when client has connected, disconnected
* etc.
*
*/
public class WebSocketServer {
private final int port;
public WebSocketServer(int port) {
this.port = port;
}
public void run() throws Exception {
final ServerBootstrap sb = new ServerBootstrap();
try {
sb.group(new NioEventLoopGroup(), new NioEventLoopGroup())
.channel(NioServerSocketChannel.class)
.childHandler(new ChannelInitializer<SocketChannel>() {
@Override
public void initChannel(final SocketChannel ch) throws Exception {
ch.pipeline().addLast(
new HttpRequestDecoder(),
new HttpObjectAggregator(65536),
new HttpResponseEncoder(),
new WebSocketServerProtocolHandler("/websocket"),
new CustomTextFrameHandler());
}
});
final Channel ch = sb.bind(port).sync().channel();
System.out.println("Web socket server started at port " + port);
ch.closeFuture().sync();
} finally {
sb.shutdown();
}
}
public static void main(String[] args) throws Exception {
int port;
if (args.length > 0) {
port = Integer.parseInt(args[0]);
} else {
port = 8080;
}
new WebSocketServer(port).run();
}
}