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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Tomcat WebSocket Chat</title> | |
| <script> | |
| var ws = new WebSocket("ws://localhost:8080/WsChat/wschat"); | |
| ws.onopen = function(){ | |
| }; | |
| ws.onmessage = function(message){ | |
| document.getElementById("chatlog").textContent += message.data + "\n"; | |
| }; | |
| function postToServer(){ | |
| ws.send(document.getElementById("msg").value); | |
| document.getElementById("msg").value = ""; | |
| } | |
| function closeConnect(){ | |
| ws.close(); | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <textarea id="chatlog" readonly></textarea><br/> | |
| <input id="msg" type="text" /> | |
| <button type="submit" id="sendButton" onClick="postToServer()">Send!</button> | |
| <button type="submit" id="sendButton" onClick="closeConnect()">End</button> | |
| </body> | |
| </html> |
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| //This sample is how to use websocket of Tomcat7.0.52. | |
| //web.xml is not required. Because you can use Servlet3.0 Annotation. | |
| package wsapp; | |
| import java.io.IOException; | |
| import java.util.ArrayList; | |
| import javax.websocket.OnClose; | |
| import javax.websocket.OnMessage; | |
| import javax.websocket.OnOpen; | |
| import javax.websocket.Session; | |
| import javax.websocket.server.ServerEndpoint; | |
| @ServerEndpoint(value = "/wschat") | |
| public class WsChat{ | |
| //notice:not thread-safe | |
| private static ArrayList<Session> sessionList = new ArrayList<Session>(); | |
| @OnOpen | |
| public void onOpen(Session session){ | |
| try{ | |
| sessionList.add(session); | |
| //asynchronous communication | |
| session.getBasicRemote().sendText("Hello!"); | |
| }catch(IOException e){} | |
| } | |
| @OnClose | |
| public void onClose(Session session){ | |
| sessionList.remove(session); | |
| } | |
| @OnMessage | |
| public void onMessage(String msg){ | |
| try{ | |
| for(Session session : sessionList){ | |
| //asynchronous communication | |
| session.getBasicRemote().sendText(msg); | |
| } | |
| }catch(IOException e){} | |
| } | |
| } |
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