websocket.server.RandomResponseGenerator.java
计算
安全
数据库
网络和加速
企业服务
package 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.java
package 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<FullHttpRequest> {
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.java
package 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<TextWebSocketFrame> {
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.java
package 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<Channel> {
@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
<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.0.29.Final</version>
</dependency>
</dependencies>使用HTML5作为websocket前端实现
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<script type="text/javascript">
var 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.");
}
}
</script>
<form onsubmit="return false;">
<input type="text" name="message" value="Hello, World!"><input
type="button" value="发送消息"
onclick="send(this.form.message.value)">
<h4>输出：</h4>
<textarea id="responseText" ></textarea>
<input type="button" onclick="javascript:document.getElementById('responseText').value=''" value="清空">
</form>
</body>
</html>亿速云「云服务器」，即开即用、新一代英特尔至强铂金CPU、三副本存储NVMe SSD云盘，价格低至29元/月。点击查看>>
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