Polish WebSocket samples
This commit is contained in:
Phillip Webb
@@ -0,0 +1,134 @@
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<!--
|
||||
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.
|
||||
-->
|
||||
|
||||
<!DOCTYPE html>
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<html>
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<head>
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<title>Apache Tomcat WebSocket Examples: Echo</title>
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<style type="text/css">
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#connect-container {
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float: left;
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width: 400px
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}
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#connect-container div {
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padding: 5px;
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}
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#console-container {
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float: left;
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margin-left: 15px;
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width: 400px;
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}
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#console {
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border: 1px solid #CCCCCC;
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border-right-color: #999999;
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border-bottom-color: #999999;
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height: 170px;
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overflow-y: scroll;
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padding: 5px;
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width: 100%;
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}
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#console p {
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padding: 0;
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margin: 0;
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}
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</style>
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<script src="https://cdn.jsdelivr.net/sockjs/0.3.4/sockjs.min.js"></script>
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<script type="text/javascript">
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var ws = null;
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function setConnected(connected) {
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document.getElementById('connect').disabled = connected;
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document.getElementById('disconnect').disabled = !connected;
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document.getElementById('echo').disabled = !connected;
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}
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function connect() {
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var target = document.getElementById('target').value;
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ws = new SockJS(target);
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ws.onopen = function () {
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setConnected(true);
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log('Info: WebSocket connection opened.');
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};
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ws.onmessage = function (event) {
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log('Received: ' + event.data);
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};
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ws.onclose = function () {
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setConnected(false);
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log('Info: WebSocket connection closed.');
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};
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}
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function disconnect() {
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if (ws != null) {
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ws.close();
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ws = null;
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}
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setConnected(false);
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}
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function echo() {
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if (ws != null) {
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var message = document.getElementById('message').value;
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log('Sent: ' + message);
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ws.send(message);
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} else {
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alert('WebSocket connection not established, please connect.');
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}
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}
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function log(message) {
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var console = document.getElementById('console');
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var p = document.createElement('p');
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p.style.wordWrap = 'break-word';
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p.appendChild(document.createTextNode(message));
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console.appendChild(p);
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while (console.childNodes.length > 25) {
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console.removeChild(console.firstChild);
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}
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console.scrollTop = console.scrollHeight;
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}
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</script>
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</head>
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<body>
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<noscript><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websockets rely on Javascript being enabled. Please enable
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Javascript and reload this page!</h2></noscript>
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<div>
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<div id="connect-container">
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<div>
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<input id="target" type="text" size="40" style="width: 350px" value="/echo"/>
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</div>
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<div>
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<button id="connect" onclick="connect();">Connect</button>
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<button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button>
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</div>
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<div>
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<textarea id="message" style="width: 350px">Here is a message!</textarea>
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</div>
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<div>
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<button id="echo" onclick="echo();" disabled="disabled">Echo message</button>
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</div>
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</div>
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<div id="console-container">
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<div id="console"></div>
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</div>
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</div>
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</body>
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</html>
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@@ -0,0 +1,33 @@
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<!--
|
||||
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.
|
||||
-->
|
||||
|
||||
<!DOCTYPE html>
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<html>
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<head>
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<title>Apache Tomcat WebSocket Examples: Index</title>
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</head>
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<body>
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<noscript><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websockets rely on Javascript being enabled. Please enable
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Javascript and reload this page!</h2></noscript>
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<p>Please select the sample you would like to try.</p>
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<ul>
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<li><a href="./echo.html">Echo</a></li>
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<li><a href="./reverse.html">Reverse</a></li>
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<li><a href="./snake.html">Snake</a></li>
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</ul>
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</body>
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</html>
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@@ -0,0 +1,141 @@
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<!--
|
||||
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.
|
||||
-->
|
||||
|
||||
<!DOCTYPE html>
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<html>
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<head>
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<title>WebSocket Examples: Reverse</title>
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<style type="text/css">
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#connect-container {
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float: left;
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width: 400px
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}
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#connect-container div {
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padding: 5px;
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}
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#console-container {
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float: left;
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margin-left: 15px;
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width: 400px;
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}
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#console {
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border: 1px solid #CCCCCC;
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border-right-color: #999999;
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border-bottom-color: #999999;
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height: 170px;
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overflow-y: scroll;
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padding: 5px;
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width: 100%;
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}
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#console p {
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padding: 0;
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margin: 0;
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}
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</style>
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<script type="text/javascript">
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var ws = null;
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function setConnected(connected) {
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document.getElementById('connect').disabled = connected;
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document.getElementById('disconnect').disabled = !connected;
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document.getElementById('reverse').disabled = !connected;
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}
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function connect() {
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var target = document.getElementById('target').value;
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ws = new WebSocket(target);
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ws.onopen = function () {
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setConnected(true);
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log('Info: WebSocket connection opened.');
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};
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ws.onmessage = function (event) {
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log('Received: ' + event.data);
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};
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ws.onclose = function () {
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setConnected(false);
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log('Info: WebSocket connection closed.');
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};
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}
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function updateTarget() {
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if (window.location.protocol == 'http:') {
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document.getElementById('target').value = 'ws://' + window.location.host + document.getElementById('target').value;
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} else {
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document.getElementById('target').value = 'wss://' + window.location.host + document.getElementById('target').value;
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}
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}
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function disconnect() {
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if (ws != null) {
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ws.close();
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ws = null;
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}
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setConnected(false);
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}
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function reverse() {
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if (ws != null) {
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var message = document.getElementById('message').value;
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log('Sent: ' + message);
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ws.send(message);
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} else {
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alert('WebSocket connection not established, please connect.');
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}
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}
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function log(message) {
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var console = document.getElementById('console');
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var p = document.createElement('p');
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p.style.wordWrap = 'break-word';
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p.appendChild(document.createTextNode(message));
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console.appendChild(p);
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while (console.childNodes.length > 25) {
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console.removeChild(console.firstChild);
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}
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console.scrollTop = console.scrollHeight;
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}
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</script>
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</head>
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<body onload="updateTarget()">
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<noscript><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websockets rely on Javascript being enabled. Please enable
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Javascript and reload this page!</h2></noscript>
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<div>
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<div id="connect-container">
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<div>
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<input id="target" type="text" size="40" style="width: 350px" value="/reverse"/>
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</div>
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<div>
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<button id="connect" onclick="connect();">Connect</button>
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<button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button>
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</div>
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<div>
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<textarea id="message" style="width: 350px">Here is a message!</textarea>
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</div>
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<div>
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<button id="reverse" onclick="reverse();" disabled="disabled">Reverse message</button>
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</div>
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</div>
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<div id="console-container">
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<div id="console"></div>
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</div>
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</div>
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</body>
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</html>
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@@ -0,0 +1,250 @@
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<!--
|
||||
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.
|
||||
-->
|
||||
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
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<title>Apache Tomcat WebSocket Examples: Multiplayer Snake</title>
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<style type="text/css">
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#playground {
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width: 640px;
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height: 480px;
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background-color: #000;
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}
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|
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#console-container {
|
||||
float: left;
|
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margin-left: 15px;
|
||||
width: 300px;
|
||||
}
|
||||
|
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#console {
|
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border: 1px solid #CCCCCC;
|
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border-right-color: #999999;
|
||||
border-bottom-color: #999999;
|
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height: 480px;
|
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overflow-y: scroll;
|
||||
padding-left: 5px;
|
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padding-right: 5px;
|
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width: 100%;
|
||||
}
|
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|
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#console p {
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padding: 0;
|
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margin: 0;
|
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}
|
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</style>
|
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<script src="https://cdn.jsdelivr.net/sockjs/0.3.4/sockjs.min.js"></script>
|
||||
</head>
|
||||
<body>
|
||||
<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></noscript>
|
||||
|
||||
<div style="float: left">
|
||||
<canvas id="playground" width="640" height="480"></canvas>
|
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</div>
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<div id="console-container">
|
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<div id="console"></div>
|
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</div>
|
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<script type="text/javascript">
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|
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var Game = {};
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Game.fps = 30;
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Game.socket = null;
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Game.nextFrame = null;
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Game.interval = null;
|
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Game.direction = 'none';
|
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Game.gridSize = 10;
|
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|
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function Snake() {
|
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this.snakeBody = [];
|
||||
this.color = null;
|
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}
|
||||
|
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Snake.prototype.draw = function(context) {
|
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for (var id in this.snakeBody) {
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||||
context.fillStyle = this.color;
|
||||
context.fillRect(this.snakeBody[id].x, this.snakeBody[id].y, Game.gridSize, Game.gridSize);
|
||||
}
|
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};
|
||||
|
||||
Game.initialize = function() {
|
||||
this.entities = [];
|
||||
canvas = document.getElementById('playground');
|
||||
if (!canvas.getContext) {
|
||||
Console.log('Error: 2d canvas not supported by this browser.');
|
||||
return;
|
||||
}
|
||||
this.context = canvas.getContext('2d');
|
||||
window.addEventListener('keydown', function (e) {
|
||||
var code = e.keyCode;
|
||||
if (code > 36 && code < 41) {
|
||||
switch (code) {
|
||||
case 37:
|
||||
if (Game.direction != 'east') Game.setDirection('west');
|
||||
break;
|
||||
case 38:
|
||||
if (Game.direction != 'south') Game.setDirection('north');
|
||||
break;
|
||||
case 39:
|
||||
if (Game.direction != 'west') Game.setDirection('east');
|
||||
break;
|
||||
case 40:
|
||||
if (Game.direction != 'north') Game.setDirection('south');
|
||||
break;
|
||||
}
|
||||
}
|
||||
}, false);
|
||||
Game.connect();
|
||||
};
|
||||
|
||||
Game.setDirection = function(direction) {
|
||||
Game.direction = direction;
|
||||
Game.socket.send(direction);
|
||||
Console.log('Sent: Direction ' + direction);
|
||||
};
|
||||
|
||||
Game.startGameLoop = function() {
|
||||
if (window.webkitRequestAnimationFrame) {
|
||||
Game.nextFrame = function () {
|
||||
webkitRequestAnimationFrame(Game.run);
|
||||
};
|
||||
} else if (window.mozRequestAnimationFrame) {
|
||||
Game.nextFrame = function () {
|
||||
mozRequestAnimationFrame(Game.run);
|
||||
};
|
||||
} else {
|
||||
Game.interval = setInterval(Game.run, 1000 / Game.fps);
|
||||
}
|
||||
if (Game.nextFrame != null) {
|
||||
Game.nextFrame();
|
||||
}
|
||||
};
|
||||
|
||||
Game.stopGameLoop = function () {
|
||||
Game.nextFrame = null;
|
||||
if (Game.interval != null) {
|
||||
clearInterval(Game.interval);
|
||||
}
|
||||
};
|
||||
|
||||
Game.draw = function() {
|
||||
this.context.clearRect(0, 0, 640, 480);
|
||||
for (var id in this.entities) {
|
||||
this.entities[id].draw(this.context);
|
||||
}
|
||||
};
|
||||
|
||||
Game.addSnake = function(id, color) {
|
||||
Game.entities[id] = new Snake();
|
||||
Game.entities[id].color = color;
|
||||
};
|
||||
|
||||
Game.updateSnake = function(id, snakeBody) {
|
||||
if (typeof Game.entities[id] != "undefined") {
|
||||
Game.entities[id].snakeBody = snakeBody;
|
||||
}
|
||||
};
|
||||
|
||||
Game.removeSnake = function(id) {
|
||||
Game.entities[id] = null;
|
||||
// Force GC.
|
||||
delete Game.entities[id];
|
||||
};
|
||||
|
||||
Game.run = (function() {
|
||||
var skipTicks = 1000 / Game.fps, nextGameTick = (new Date).getTime();
|
||||
|
||||
return function() {
|
||||
while ((new Date).getTime() > nextGameTick) {
|
||||
nextGameTick += skipTicks;
|
||||
}
|
||||
Game.draw();
|
||||
if (Game.nextFrame != null) {
|
||||
Game.nextFrame();
|
||||
}
|
||||
};
|
||||
})();
|
||||
|
||||
Game.connect = (function() {
|
||||
Game.socket = new SockJS("/snake");
|
||||
|
||||
Game.socket.onopen = function () {
|
||||
// Socket open.. start the game loop.
|
||||
Console.log('Info: WebSocket connection opened.');
|
||||
Console.log('Info: Press an arrow key to begin.');
|
||||
Game.startGameLoop();
|
||||
setInterval(function() {
|
||||
// Prevent server read timeout.
|
||||
Game.socket.send('ping');
|
||||
}, 5000);
|
||||
};
|
||||
|
||||
Game.socket.onclose = function () {
|
||||
Console.log('Info: WebSocket closed.');
|
||||
Game.stopGameLoop();
|
||||
};
|
||||
|
||||
Game.socket.onmessage = function (message) {
|
||||
// _Potential_ security hole, consider using json lib to parse data in production.
|
||||
var packet = eval('(' + message.data + ')');
|
||||
switch (packet.type) {
|
||||
case 'update':
|
||||
for (var i = 0; i < packet.data.length; i++) {
|
||||
Game.updateSnake(packet.data[i].id, packet.data[i].body);
|
||||
}
|
||||
break;
|
||||
case 'join':
|
||||
for (var j = 0; j < packet.data.length; j++) {
|
||||
Game.addSnake(packet.data[j].id, packet.data[j].color);
|
||||
}
|
||||
break;
|
||||
case 'leave':
|
||||
Game.removeSnake(packet.id);
|
||||
break;
|
||||
case 'dead':
|
||||
Console.log('Info: Your snake is dead, bad luck!');
|
||||
Game.direction = 'none';
|
||||
break;
|
||||
case 'kill':
|
||||
Console.log('Info: Head shot!');
|
||||
break;
|
||||
}
|
||||
};
|
||||
});
|
||||
|
||||
var Console = {};
|
||||
|
||||
Console.log = (function(message) {
|
||||
var console = document.getElementById('console');
|
||||
var p = document.createElement('p');
|
||||
p.style.wordWrap = 'break-word';
|
||||
p.innerHTML = message;
|
||||
console.appendChild(p);
|
||||
while (console.childNodes.length > 25) {
|
||||
console.removeChild(console.firstChild);
|
||||
}
|
||||
console.scrollTop = console.scrollHeight;
|
||||
});
|
||||
|
||||
Game.initialize();
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
Reference in New Issue
Block a user