升级Tomcat版本 apache-tomcat-7.0.77
diff --git a/tomcat-cas/webapps/examples/websocket/snake.xhtml b/tomcat-cas/webapps/examples/websocket/snake.xhtml
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+<?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: Multiplayer Snake</title>
+ <style type="text/css"><![CDATA[
+ #playground {
+ width: 640px;
+ height: 480px;
+ background-color: #000;
+ }
+
+ #console-container {
+ float: left;
+ margin-left: 15px;
+ width: 300px;
+ }
+
+ #console {
+ border: 1px solid #CCCCCC;
+ border-right-color: #999999;
+ border-bottom-color: #999999;
+ height: 480px;
+ overflow-y: scroll;
+ padding-left: 5px;
+ padding-right: 5px;
+ width: 100%;
+ }
+
+ #console p {
+ padding: 0;
+ margin: 0;
+ }
+ ]]></style>
+</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 style="float: left">
+ <canvas id="playground" width="640" height="480"/>
+ </div>
+ <div id="console-container">
+ <div id="console"/>
+ </div>
+ <script type="application/javascript"><![CDATA[
+
+ var Game = {};
+
+ Game.fps = 30;
+ Game.socket = null;
+ Game.nextFrame = null;
+ Game.interval = null;
+ Game.direction = 'none';
+ Game.gridSize = 10;
+
+ function Snake() {
+ this.snakeBody = [];
+ this.color = null;
+ }
+
+ Snake.prototype.draw = function(context) {
+ for (var id in this.snakeBody) {
+ context.fillStyle = this.color;
+ context.fillRect(this.snakeBody[id].x, this.snakeBody[id].y, Game.gridSize, Game.gridSize);
+ }
+ };
+
+ 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);
+ if (window.location.protocol == 'http:') {
+ Game.connect('ws://' + window.location.host + '/examples/websocket/snake');
+ } else {
+ Game.connect('wss://' + window.location.host + '/examples/websocket/snake');
+ }
+ };
+
+ 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(host) {
+ if ('WebSocket' in window) {
+ Game.socket = new WebSocket(host);
+ } else if ('MozWebSocket' in window) {
+ Game.socket = new MozWebSocket(host);
+ } else {
+ Console.log('Error: WebSocket is not supported by this browser.');
+ return;
+ }
+
+ 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();
+
+
+ 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>
+</body>
+</html>
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