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