/js/lib/Socket.IO-node/support/socket.io-client/lib/vendor/web-socket-js/flash-src/com/adobe/net/proxies/RFC2817Socket.as
ActionScript | 204 lines | 123 code | 14 blank | 67 comment | 25 complexity | e8632f370aa10d170af1fa8972eb475b MD5 | raw file
1/* 2 Adobe Systems Incorporated(r) Source Code License Agreement 3 Copyright(c) 2005 Adobe Systems Incorporated. All rights reserved. 4 5 Please read this Source Code License Agreement carefully before using 6 the source code. 7 8 Adobe Systems Incorporated grants to you a perpetual, worldwide, non-exclusive, 9 no-charge, royalty-free, irrevocable copyright license, to reproduce, 10 prepare derivative works of, publicly display, publicly perform, and 11 distribute this source code and such derivative works in source or 12 object code form without any attribution requirements. 13 14 The name "Adobe Systems Incorporated" must not be used to endorse or promote products 15 derived from the source code without prior written permission. 16 17 You agree to indemnify, hold harmless and defend Adobe Systems Incorporated from and 18 against any loss, damage, claims or lawsuits, including attorney's 19 fees that arise or result from your use or distribution of the source 20 code. 21 22 THIS SOURCE CODE IS PROVIDED "AS IS" AND "WITH ALL FAULTS", WITHOUT 23 ANY TECHNICAL SUPPORT OR ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, 24 BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ALSO, THERE IS NO WARRANTY OF 26 NON-INFRINGEMENT, TITLE OR QUIET ENJOYMENT. IN NO EVENT SHALL MACROMEDIA 27 OR ITS SUPPLIERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 28 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 29 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 30 OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 32 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOURCE CODE, EVEN IF 33 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34*/ 35package com.adobe.net.proxies 36{ 37 import flash.events.Event; 38 import flash.events.IOErrorEvent; 39 import flash.events.ProgressEvent; 40 import flash.net.Socket; 41 42 /** 43 * This class allows TCP socket connections through HTTP proxies in accordance with 44 * RFC 2817: 45 * 46 * ftp://ftp.rfc-editor.org/in-notes/rfc2817.txt 47 * 48 * It can also be used to make direct connections to a destination, as well. If you 49 * pass the host and port into the constructor, no proxy will be used. You can also 50 * call connect, passing in the host and the port, and if you didn't set the proxy 51 * info, a direct connection will be made. A proxy is only used after you have called 52 * the setProxyInfo function. 53 * 54 * The connection to and negotiation with the proxy is completely hidden. All the 55 * same events are thrown whether you are using a proxy or not, and the data you 56 * receive from the target server will look exact as it would if you were connected 57 * to it directly rather than through a proxy. 58 * 59 * @author Christian Cantrell 60 * 61 **/ 62 public class RFC2817Socket 63 extends Socket 64 { 65 private var proxyHost:String = null; 66 private var host:String = null; 67 private var proxyPort:int = 0; 68 private var port:int = 0; 69 private var deferredEventHandlers:Object = new Object(); 70 private var buffer:String = new String(); 71 72 /** 73 * Construct a new RFC2817Socket object. If you pass in the host and the port, 74 * no proxy will be used. If you want to use a proxy, instantiate with no 75 * arguments, call setProxyInfo, then call connect. 76 **/ 77 public function RFC2817Socket(host:String = null, port:int = 0) 78 { 79 if (host != null && port != 0) 80 { 81 super(host, port); 82 } 83 } 84 85 /** 86 * Set the proxy host and port number. Your connection will only proxied if 87 * this function has been called. 88 **/ 89 public function setProxyInfo(host:String, port:int):void 90 { 91 this.proxyHost = host; 92 this.proxyPort = port; 93 94 var deferredSocketDataHandler:Object = this.deferredEventHandlers[ProgressEvent.SOCKET_DATA]; 95 var deferredConnectHandler:Object = this.deferredEventHandlers[Event.CONNECT]; 96 97 if (deferredSocketDataHandler != null) 98 { 99 super.removeEventListener(ProgressEvent.SOCKET_DATA, deferredSocketDataHandler.listener, deferredSocketDataHandler.useCapture); 100 } 101 102 if (deferredConnectHandler != null) 103 { 104 super.removeEventListener(Event.CONNECT, deferredConnectHandler.listener, deferredConnectHandler.useCapture); 105 } 106 } 107 108 /** 109 * Connect to the specified host over the specified port. If you want your 110 * connection proxied, call the setProxyInfo function first. 111 **/ 112 public override function connect(host:String, port:int):void 113 { 114 if (this.proxyHost == null) 115 { 116 this.redirectConnectEvent(); 117 this.redirectSocketDataEvent(); 118 super.connect(host, port); 119 } 120 else 121 { 122 this.host = host; 123 this.port = port; 124 super.addEventListener(Event.CONNECT, this.onConnect); 125 super.addEventListener(ProgressEvent.SOCKET_DATA, this.onSocketData); 126 super.connect(this.proxyHost, this.proxyPort); 127 } 128 } 129 130 private function onConnect(event:Event):void 131 { 132 this.writeUTFBytes("CONNECT "+this.host+":"+this.port+" HTTP/1.1\n\n"); 133 this.flush(); 134 this.redirectConnectEvent(); 135 } 136 137 private function onSocketData(event:ProgressEvent):void 138 { 139 while (this.bytesAvailable != 0) 140 { 141 this.buffer += this.readUTFBytes(1); 142 if (this.buffer.search(/\r?\n\r?\n$/) != -1) 143 { 144 this.checkResponse(event); 145 break; 146 } 147 } 148 } 149 150 private function checkResponse(event:ProgressEvent):void 151 { 152 var responseCode:String = this.buffer.substr(this.buffer.indexOf(" ")+1, 3); 153 154 if (responseCode.search(/^2/) == -1) 155 { 156 var ioError:IOErrorEvent = new IOErrorEvent(IOErrorEvent.IO_ERROR); 157 ioError.text = "Error connecting to the proxy ["+this.proxyHost+"] on port ["+this.proxyPort+"]: " + this.buffer; 158 this.dispatchEvent(ioError); 159 } 160 else 161 { 162 this.redirectSocketDataEvent(); 163 this.dispatchEvent(new Event(Event.CONNECT)); 164 if (this.bytesAvailable > 0) 165 { 166 this.dispatchEvent(event); 167 } 168 } 169 this.buffer = null; 170 } 171 172 private function redirectConnectEvent():void 173 { 174 super.removeEventListener(Event.CONNECT, onConnect); 175 var deferredEventHandler:Object = this.deferredEventHandlers[Event.CONNECT]; 176 if (deferredEventHandler != null) 177 { 178 super.addEventListener(Event.CONNECT, deferredEventHandler.listener, deferredEventHandler.useCapture, deferredEventHandler.priority, deferredEventHandler.useWeakReference); 179 } 180 } 181 182 private function redirectSocketDataEvent():void 183 { 184 super.removeEventListener(ProgressEvent.SOCKET_DATA, onSocketData); 185 var deferredEventHandler:Object = this.deferredEventHandlers[ProgressEvent.SOCKET_DATA]; 186 if (deferredEventHandler != null) 187 { 188 super.addEventListener(ProgressEvent.SOCKET_DATA, deferredEventHandler.listener, deferredEventHandler.useCapture, deferredEventHandler.priority, deferredEventHandler.useWeakReference); 189 } 190 } 191 192 public override function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int=0.0, useWeakReference:Boolean=false):void 193 { 194 if (type == Event.CONNECT || type == ProgressEvent.SOCKET_DATA) 195 { 196 this.deferredEventHandlers[type] = {listener:listener,useCapture:useCapture, priority:priority, useWeakReference:useWeakReference}; 197 } 198 else 199 { 200 super.addEventListener(type, listener, useCapture, priority, useWeakReference); 201 } 202 } 203 } 204}