Java tutorial
/* * Copyright 2012 The Netty Project * * The Netty Project 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 me.davehummel.tredserver.web; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import io.netty.util.CharsetUtil; /** * Generates the demo HTML page which is served at http://localhost:8080/ */ public final class VoxelExplorerIndex { private static final String NEWLINE = "\r\n"; public static ByteBuf getContent(String webSocketLocation) { return Unpooled.copiedBuffer("<html><head><title>Voxel Explorer</title></head>" + NEWLINE + "<body onload=\"start()\">" + NEWLINE + "<canvas id=\"glcanvas\" width=\"640\" height=\"480\">\n" + " Your browser doesn't appear to support the \n" + " <code><canvas></code> element.\n" + "</canvas> <p>" + "<script type=\"text/javascript\">" + NEWLINE + "var socket;" + NEWLINE + "if (!window.WebSocket) {" + NEWLINE + " window.WebSocket = window.MozWebSocket;" + NEWLINE + '}' + NEWLINE + "if (window.WebSocket) {" + NEWLINE + " socket = new WebSocket(\"" + webSocketLocation + "\");" + NEWLINE + " socket.onmessage = function(event) {" + NEWLINE + " var ta = document.getElementById('responseText');" + NEWLINE + " ta.value = ta.value + '\\n' + event.data;" + NEWLINE + " ta.scrollTop = ta.scrollHeight;" + " };" + NEWLINE + " socket.onopen = function(event) {" + NEWLINE + " var ta = document.getElementById('responseText');" + NEWLINE + " ta.value = \"Web Socket opened!\";" + NEWLINE + " };" + NEWLINE + " socket.onclose = function(event) {" + NEWLINE + " var ta = document.getElementById('responseText');" + NEWLINE + " ta.value = ta.value + \"Web Socket closed\"; " + NEWLINE + " };" + NEWLINE + "} else {" + NEWLINE + " alert(\"Your browser does not support Web Socket.\");" + NEWLINE + '}' + NEWLINE + NEWLINE + "function send(message) {" + NEWLINE + " if (!window.WebSocket) { return; }" + NEWLINE + " if (socket.readyState == WebSocket.OPEN) {" + NEWLINE + " socket.send(message);" + NEWLINE + " } else {" + NEWLINE + " alert(\"The socket is not open.\");" + NEWLINE + " }" + NEWLINE + '}' + NEWLINE + "var gl; // A global variable for the WebGL context\n" + "\n" + "function start() {\n" + " var canvas = document.getElementById(\"glcanvas\");\n" + "\n" + " // Initialize the GL context\n" + " gl = initWebGL(canvas);\n" + " \n" + " // Only continue if WebGL is available and working\n" + " \n" + " if (gl) {\n" + " // Set clear color to black, fully opaque\n" + " gl.clearColor(0.0, 0.0, 0.0, 1.0);\n" + " // Enable depth testing\n" + " gl.enable(gl.DEPTH_TEST);\n" + " // Near things obscure far things\n" + " gl.depthFunc(gl.LEQUAL);\n" + " // Clear the color as well as the depth buffer.\n" + " gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n" + " }\n" + "}" + "function initWebGL(canvas) {\n" + " gl = null;\n" + " \n" + " try {\n" + " // Try to grab the standard context. If it fails, fallback to experimental.\n" + " gl = canvas.getContext(\"webgl\") || canvas.getContext(\"experimental-webgl\");\n" + " }\n" + " catch(e) {}\n" + " \n" + " // If we don't have a GL context, give up now\n" + " if (!gl) {\n" + " alert(\"Unable to initialize WebGL. Your browser may not support it.\");\n" + " gl = null;\n" + " }\n" + " \n" + " return gl;\n" + "}" + "</script>" + NEWLINE + "<form onsubmit=\"return false;\">" + NEWLINE + "<input type=\"text\" name=\"message\" style=\"width:400px\" value=\"C G 10 HEADING\"/>" + "<input type=\"button\" value=\"Send\"" + NEWLINE + " onclick=\"send(this.form.message.value)\" />" + NEWLINE + "<h3>Output</h3>" + NEWLINE + "<textarea id=\"responseText\" style=\"width:500px;height:300px;\"></textarea>" + NEWLINE + "</form>" + NEWLINE + "</body>" + NEWLINE + "</html>" + NEWLINE, CharsetUtil.US_ASCII); } private VoxelExplorerIndex() { // Unused } }