[백업][가리사니] 톰켓 웹소켓 예제
html, java, javascript, jsp, tomcat
이 문서는 가리사니 개발자 포럼에 올렸던 글의 백업 파일입니다. 오래된 문서가 많아 현재 상황과 맞지 않을 수 있습니다.
출처 : http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/webapps/examples/websocket/
클라이언트
<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>Apache Tomcat WebSocket Examples: Echo</title>
<style type="text/css"><![CDATA[
#connect-container {
float: left;
width: 400px
}
#connect-container div {
padding: 5px;
}
#console-container {
float: left;
margin-left: 15px;
width: 400px;
}
#console {
border: 1px solid #CCCCCC;
border-right-color: #999999;
border-bottom-color: #999999;
height: 170px;
overflow-y: scroll;
padding: 5px;
width: 100%;
}
#console p {
padding: 0;
margin: 0;
}
]]></style>
<script type="application/javascript"><![CDATA[
var ws = null;
function setConnected(connected) {
document.getElementById('connect').disabled = connected;
document.getElementById('disconnect').disabled = !connected;
document.getElementById('echo').disabled = !connected;
}
function connect() {
var target = document.getElementById('target').value;
if (target == '') {
alert('Please select server side connection implementation.');
return;
}
if ('WebSocket' in window) {
ws = new WebSocket(target);
} else if ('MozWebSocket' in window) {
ws = new MozWebSocket(target);
} else {
alert('WebSocket is not supported by this browser.');
return;
}
ws.onopen = function () {
setConnected(true);
log('Info: WebSocket connection opened.');
};
ws.onmessage = function (event) {
log('Received: ' + event.data);
};
ws.onclose = function (event) {
setConnected(false);
log('Info: WebSocket connection closed, Code: ' + event.code + (event.reason == "" ? "" : ", Reason: " + event.reason));
};
}
function disconnect() {
if (ws != null) {
ws.close();
ws = null;
}
setConnected(false);
}
function echo() {
if (ws != null) {
var message = document.getElementById('message').value;
log('Sent: ' + message);
ws.send(message);
} else {
alert('WebSocket connection not established, please connect.');
}
}
function updateTarget(target) {
if (window.location.protocol == 'http:') {
document.getElementById('target').value = 'ws://' + window.location.host + target;
} else {
document.getElementById('target').value = 'wss://' + window.location.host + target;
}
}
function log(message) {
var console = document.getElementById('console');
var p = document.createElement('p');
p.style.wordWrap = 'break-word';
p.appendChild(document.createTextNode(message));
console.appendChild(p);
while (console.childNodes.length > 25) {
console.removeChild(console.firstChild);
}
console.scrollTop = console.scrollHeight;
}
document.addEventListener("DOMContentLoaded", function() {
// Remove elements with "noscript" class - <noscript> is not allowed in XHTML
var noscripts = document.getElementsByClassName("noscript");
for (var i = 0; i < noscripts.length; i++) {
noscripts[i].parentNode.removeChild(noscripts[i]);
}
}, false);
]]></script>
</head>
<body>
<div class="noscript"><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websockets rely on Javascript being enabled. Please enable
Javascript and reload this page!</h2></div>
<div>
<div id="connect-container">
<div>
<span>Connect to service implemented using:</span>
<!-- echo example using new programmatic API on the server side -->
<input id="radio1" type="radio" name="group1" value="/examples/websocket/echoProgrammatic"
onclick="updateTarget(this.value);"/> <label for="radio1">programmatic API</label>
<!-- echo example using new annotation API on the server side -->
<input id="radio2" type="radio" name="group1" value="/examples/websocket/echoAnnotation"
onclick="updateTarget(this.value);"/> <label for="radio2">annotation API</label>
</div>
<div>
<input id="target" type="text" size="40" style="width: 350px"/>
</div>
<div>
<button id="connect" onclick="connect();">Connect</button>
<button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button>
</div>
<div>
<textarea id="message" style="width: 350px">Here is a message!</textarea>
</div>
<div>
<button id="echo" onclick="echo();" disabled="disabled">Echo message</button>
</div>
</div>
<div id="console-container">
<div id="console"/>
</div>
</div>
</body>
</html>
서버 [어노테이션 버전]
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package websocket.echo;
import java.io.IOException;
import java.nio.ByteBuffer;
import javax.websocket.OnMessage;
import javax.websocket.PongMessage;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
@ServerEndpoint("/websocket/echoAnnotation")
public class EchoAnnotation {
@OnMessage
public void echoTextMessage(Session session, String msg, boolean last) {
try {
if (session.isOpen()) {
session.getBasicRemote().sendText(msg, last);
}
} catch (IOException e) {
try {
session.close();
} catch (IOException e1) {
// Ignore
}
}
}
@OnMessage
public void echoBinaryMessage(Session session, ByteBuffer bb,
boolean last) {
try {
if (session.isOpen()) {
session.getBasicRemote().sendBinary(bb, last);
}
} catch (IOException e) {
try {
session.close();
} catch (IOException e1) {
// Ignore
}
}
}
/**
* Process a received pong. This is a NO-OP.
*
* @param pm Ignored.
*/
@OnMessage
public void echoPongMessage(PongMessage pm) {
// NO-OP
}
}
서버 [프로그래매틱 버전]
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package websocket.echo;
import java.io.IOException;
import javax.websocket.Endpoint;
import javax.websocket.EndpointConfig;
import javax.websocket.MessageHandler;
import javax.websocket.RemoteEndpoint;
import javax.websocket.Session;
public class EchoEndpoint extends Endpoint {
@Override
public void onOpen(Session session, EndpointConfig endpointConfig) {
RemoteEndpoint.Basic remoteEndpointBasic = session.getBasicRemote();
session.addMessageHandler(new EchoMessageHandler(remoteEndpointBasic));
}
private static class EchoMessageHandler
implements MessageHandler.Whole<String> {
private final RemoteEndpoint.Basic remoteEndpointBasic;
private EchoMessageHandler(RemoteEndpoint.Basic remoteEndpointBasic) {
this.remoteEndpointBasic = remoteEndpointBasic;
}
@Override
public void onMessage(String message) {
try {
if (remoteEndpointBasic != null) {
remoteEndpointBasic.sendText(message);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}