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From J Java <jforjava1...@gmail.com>
Subject Websocket on tomcat 7.0.50 not working
Date Tue, 18 Feb 2014 11:42:01 GMT
I am trying to implement a websocket on tomcat 7.0.50 using annotated
endpoints as specified in Java Websocket API (1.0)- JSR 356. Following are
the brief steps how I have coded it 1) Write a websocket endpoint using
@ServerEndpoint annotation 2) implement @onOpen and @onMessage methods 3)
open a websocket using javascript on google chrome.

Please find code corresponding to above steps in order

1) STEP 1 & 2 - writing websocket server endpoint:

        package com.jkweb.websocket;

       import java.io.IOException;
       import java.util.HashMap;
       import java.util.List;
       import java.util.Map;

       import javax.websocket.EndpointConfig;
       import javax.websocket.OnMessage;
       import javax.websocket.OnOpen;
       import javax.websocket.Session;
       import javax.websocket.server.PathParam;
       import javax.websocket.server.ServerEndpoint;

       import org.slf4j.Logger;
       import org.slf4j.LoggerFactory;

  @ServerEndpoint(value="/websocket/fileuploadtracker")
@OnOpen public void open(Session session,EndpointConfig config) {
    ......}@OnMessagepublic void onMessage(Session session, String msg) {
    try {
        session.getBasicRemote().sendText(msg);
    } catch (IOException e) {
        logger.error(e.getMessage());
    }}
public static void sendMessage(String uniqueTocken,String msg){
    try {
        Session wsSession = socketConnectionMap.get(uniqueTocken);
        wsSession.getBasicRemote().sendText(msg);
    } catch (IOException e) {
        logger.error(e.getMessage());
    }}

}

2) STEP 3 - opening websocket using javascript api in chrome:

      wsurl =  "ws://localhost:8080/jkweb/websocket/fileuploadtracker",
        ws;
        ws = new WebSocket(wsurl);
         ws.onopen = function()
         {
            // Web Socket is connected, send data using send()
            ws.send("Sending first Message");
            alert("Message is sent...");
         };
         ws.onmessage = function (evt)
         {
            var received_msg = evt.data;
            alert("Message is received...");
         };
         ws.onclose = function(evt)
         {
            // websocket is closed.
            alert("Connection is closed..."+evt.code + ":"+evt.reason );
         };

I am using following versions of softwares : 1) Tomcat - 7.0.50 2) Java -
1.7.45 3) Servlet - 3.0 4) Have included following Maven dependency 5)
Chrome - 32.0.1700.107m

     <dependency>
     <groupId>javax.websocket</groupId>
     <artifactId>javax.websocket-api</artifactId>
     <version>1.0</version>
         <scope>provided</scope></dependency>

However I am getting following error and connection is closed with 1066
error code in chrome's console:

      WebSocket connection to
'ws://localhost:8080/jkweb/websocket/fileuploadtracker' failed: Error
during WebSocket handshake: Unexpected response code: 404

Is there any configuration I am missing out on. I tried to search a lot but
couldn't find anything. Please I need this to be solved ASAP.
Thanks,
Shailesh

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