Java tutorial
package com.pokersu.server; /* * 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. */ 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 WebSocketServerIndexPage { private static final String NEWLINE = "\r\n"; public static ByteBuf getContent(String webSocketLocation) { return Unpooled.copiedBuffer("<html><head><title>Web Socket Test</title></head>" + NEWLINE + "<body>" + NEWLINE + "<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 + " };" + NEWLINE + " socket.onopen = function(event) {" + NEWLINE + " var ta = document.getElementById('responseText');" + NEWLINE + " ta.value = \"Connection opened!\";" + NEWLINE + " };" + NEWLINE + " socket.onclose = function(event) {" + NEWLINE + " var ta = document.getElementById('responseText');" + NEWLINE + " ta.value = ta.value + \"Connection closed\"; " + NEWLINE + " };" + NEWLINE + "} else {" + NEWLINE + " alert(\"Your browser does not support 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 connection is not open.\");" + NEWLINE + " }" + NEWLINE + '}' + NEWLINE + "</script>" + NEWLINE + "<form onsubmit=\"return false;\">" + NEWLINE + "<input type=\"text\" name=\"message\" value=\"Hello, World!\"/>" + "<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 WebSocketServerIndexPage() { // Unused } }