Netty4 Simple construction of WebSocket service

Websocket.server.RandomResponseGenerator.java

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 ();p rivate int messagecount = 10;public  randomresponsegenerator (channelhandlercontext ctx) {this.ctx=ctx;} Private logger logger = logger.getlogger (randomresponsegenerator.class);p ublic void  run ()  {while (messagecount-->0) {Ctx.writeandflush (New textwebsocketframe ("[Server] the  random value is :  (+random.nextint)); 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,&NBSP;FULLHTTPREQUEST&NBSP;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,   &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;TEXTWEBSOCKETFRAME&NBSP;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 ());             &nbsP;    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 >

Using HTML5 as the WebSocket front-end implementation

Index.html

<! doctype html>

Netty4 Simple construction of WebSocket service