websocket.server.RandomResponseGenerator.javapackage websocket.server;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import java.util.Random;
import org.apache.log4j.Logger;
public class RandomResponseGenerator extends Thread{
private ChannelHandlerContext ctx;
private Random random = new Random();
private int messageCount = 10;
public RandomResponseGenerator(ChannelHandlerContext ctx){
this.ctx=ctx;
}
private Logger logger = Logger.getLogger(RandomResponseGenerator.class);
public void run() {
while(messageCount-->0){
ctx.writeAndFlush(new TextWebSocketFrame("[server] the random value is : "+random.nextInt(20)));
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
logger.error("encounter an exception",e);
}
}
}
}
websocket.server.HttpRequestHandler.javapackage websocket.server;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.FullHttpRequest;
import org.apache.log4j.Logger;
public class HttpRequestHandler extends SimpleChannelInboundHandler {
private final String wsUri;
public HttpRequestHandler(String wsUri) {
this.wsUri = wsUri;
}
private Logger logger = Logger.getLogger(HttpRequestHandler.class);
@Override
protected void channelRead0(final ChannelHandlerContext ctx, FullHttpRequest msg)
throws Exception {
if(wsUri.equalsIgnoreCase(msg.getUri())){
logger.info("a websocket connection established ... ");
logger.info("the request uri is : "+msg.getUri());
new RandomResponseGenerator(ctx).start();
ctx.fireChannelRead(msg.retain());
}
}
}
websocket.server.TextWebSocketFrameHandler.javapackage websocket.server;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import org.apache.log4j.Logger;
public class TextWebSocketFrameHandler extends SimpleChannelInboundHandler {
private Logger logger = Logger.getLogger(TextWebSocketFrameHandler.class);
@Override
protected void channelRead0(ChannelHandlerContext ctx,
TextWebSocketFrame msg) throws Exception {
String message = msg.content().toString(io.netty.util.CharsetUtil.UTF_8);
logger.info("receive below information from client:\n"+message);
ctx.writeAndFlush(new TextWebSocketFrame("[server] receive message ["+message+"] successfully"));
}
}
websocket.server.WebSocketServerInitializer.javapackage websocket.server;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
import io.netty.handler.stream.ChunkedWriteHandler;
public class WebSocketServerInitializer extends ChannelInitializer {
@Override
protected void initChannel(Channel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
pipeline.addLast(new HttpServerCodec());
pipeline.addLast(new ChunkedWriteHandler());
pipeline.addLast(new HttpObjectAggregator(64*1024));
pipeline.addLast(new HttpRequestHandler("/ws"));
pipeline.addLast(new WebSocketServerProtocolHandler("/ws"));
pipeline.addLast(new TextWebSocketFrameHandler());
}
}
pom.xml
log4j
log4j
1.2.14
commons-logging
commons-logging
1.1.1
io.netty
netty-all
4.0.29.Final
使用HTML5作为websocket前端实现
index.htmlhtml>
Insert title herevar socket;
if (!window.WebSocket) {
window.WebSocket = window.MozWebSocket;
}
if (window.WebSocket) {
socket = new WebSocket("ws://localhost:8844/ws");
socket.onmessage = function(event) {
var ta = document.getElementById('responseText');
ta.value = ta.value + '\n' + event.data
};
socket.onopen = function(event) {
var ta = document.getElementById('responseText');
ta.value = "连接开启!";
};
socket.onclose = function(event) {
var ta = document.getElementById('responseText');
ta.value = ta.value + "连接被关闭";
};
} else {
alert("你的浏览器不支持!");
}
function send(message) {
if (!window.WebSocket) {
return;
}
if (socket.readyState == WebSocket.OPEN) {
socket.send(message);
} else {
alert("连接没有开启.");
}
}
type="button" value="发送消息"
οnclick="send(this.form.message.value)">