100 lines
3.5 KiB
Java
100 lines
3.5 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License, version
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* 2.0 (the "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package io.netty.example.http.websocketx.html5;
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import io.netty.bootstrap.ServerBootstrap;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelInitializer;
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import io.netty.channel.EventLoopGroup;
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import io.netty.channel.nio.NioEventLoopGroup;
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import io.netty.channel.socket.SocketChannel;
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import io.netty.channel.socket.nio.NioServerSocketChannel;
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import io.netty.handler.codec.http.HttpObjectAggregator;
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import io.netty.handler.codec.http.HttpRequestDecoder;
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import io.netty.handler.codec.http.HttpResponseEncoder;
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import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
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/**
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* A WebSocket Server that respondes to requests at:
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*
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* <pre>
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* http://localhost:8080/websocket
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* </pre>
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*
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* The example differs from many of the other examples in Netty in that is does
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* not have an acomponying client. Instead a html page is provided that
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* interacts with this server. <br>
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* Open up the following file a web browser that supports WebSocket's:
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*
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* <pre>
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* example/src/main/resources/websocketx/html5/websocket.html
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* </pre>
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*
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* The html page is very simple were you simply enter some text and the server
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* will echo the same text back, but in uppercase. You, also see getStatus messages
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* in the "Response From Server" area when client has connected, disconnected
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* etc.
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*
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*/
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public class WebSocketServer {
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private final int port;
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public WebSocketServer(int port) {
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this.port = port;
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}
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public void run() throws Exception {
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EventLoopGroup bossGroup = new NioEventLoopGroup(1);
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EventLoopGroup workerGroup = new NioEventLoopGroup();
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try {
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final ServerBootstrap sb = new ServerBootstrap();
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sb.group(bossGroup, workerGroup)
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.channel(NioServerSocketChannel.class)
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.childHandler(new ChannelInitializer<SocketChannel>() {
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@Override
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public void initChannel(final SocketChannel ch) throws Exception {
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ch.pipeline().addLast(
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new HttpResponseEncoder(),
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new HttpRequestDecoder(),
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new HttpObjectAggregator(65536),
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new WebSocketServerProtocolHandler("/websocket"),
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new CustomTextFrameHandler());
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}
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});
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final Channel ch = sb.bind(port).sync().channel();
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System.out.println("Web socket server started at port " + port);
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ch.closeFuture().sync();
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} finally {
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bossGroup.shutdownGracefully();
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workerGroup.shutdownGracefully();
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}
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}
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public static void main(String[] args) throws Exception {
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int port;
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if (args.length > 0) {
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port = Integer.parseInt(args[0]);
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} else {
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port = 8080;
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}
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new WebSocketServer(port).run();
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}
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}
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