root / docs / www / colonyscout / internal / includes / uploadify / com / adobe / net / proxies / RFC2817Socket.as @ f59acf11
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/* |
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Copyright (c) 2008, Adobe Systems Incorporated |
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All rights reserved. |
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|
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are |
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met: |
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|
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* Redistributions of source code must retain the above copyright notice, |
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this list of conditions and the following disclaimer. |
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|
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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|
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* Neither the name of Adobe Systems Incorporated nor the names of its |
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contributors may be used to endorse or promote products derived from |
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this software without specific prior written permission. |
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|
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package com.adobe.net.proxies |
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{ |
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import flash.events.Event; |
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import flash.events.IOErrorEvent; |
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import flash.events.ProgressEvent; |
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import flash.net.Socket; |
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|
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/** |
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* This class allows TCP socket connections through HTTP proxies in accordance with |
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* RFC 2817: |
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* |
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* ftp://ftp.rfc-editor.org/in-notes/rfc2817.txt |
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* |
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* It can also be used to make direct connections to a destination, as well. If you |
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* pass the host and port into the constructor, no proxy will be used. You can also |
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* call connect, passing in the host and the port, and if you didn't set the proxy |
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* info, a direct connection will be made. A proxy is only used after you have called |
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* the setProxyInfo function. |
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* |
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* The connection to and negotiation with the proxy is completely hidden. All the |
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* same events are thrown whether you are using a proxy or not, and the data you |
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* receive from the target server will look exact as it would if you were connected |
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* to it directly rather than through a proxy. |
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* |
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* @author Christian Cantrell |
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* |
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**/ |
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public class RFC2817Socket |
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extends Socket |
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{ |
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private var proxyHost:String = null; |
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private var host:String = null; |
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private var proxyPort:int = 0; |
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private var port:int = 0; |
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private var deferredEventHandlers:Object = new Object(); |
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private var buffer:String = new String(); |
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|
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/** |
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* Construct a new RFC2817Socket object. If you pass in the host and the port, |
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* no proxy will be used. If you want to use a proxy, instantiate with no |
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* arguments, call setProxyInfo, then call connect. |
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**/ |
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public function RFC2817Socket(host:String = null, port:int = 0) |
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{ |
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super(host, port); |
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} |
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|
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/** |
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* Set the proxy host and port number. Your connection will only proxied if |
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* this function has been called. |
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**/ |
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public function setProxyInfo(host:String, port:int):void |
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{ |
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this.proxyHost = host; |
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this.proxyPort = port; |
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|
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var deferredSocketDataHandler:Object = this.deferredEventHandlers[ProgressEvent.SOCKET_DATA]; |
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var deferredConnectHandler:Object = this.deferredEventHandlers[Event.CONNECT]; |
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|
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if (deferredSocketDataHandler != null) |
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{ |
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super.removeEventListener(ProgressEvent.SOCKET_DATA, deferredSocketDataHandler.listener, deferredSocketDataHandler.useCapture); |
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} |
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|
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if (deferredConnectHandler != null) |
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{ |
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super.removeEventListener(Event.CONNECT, deferredConnectHandler.listener, deferredConnectHandler.useCapture); |
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} |
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} |
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|
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/** |
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* Connect to the specified host over the specified port. If you want your |
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* connection proxied, call the setProxyInfo function first. |
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**/ |
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public override function connect(host:String, port:int):void |
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{ |
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if (this.proxyHost == null) |
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{ |
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this.redirectConnectEvent(); |
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this.redirectSocketDataEvent(); |
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super.connect(host, port); |
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} |
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else |
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{ |
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this.host = host; |
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this.port = port; |
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super.addEventListener(Event.CONNECT, this.onConnect); |
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super.addEventListener(ProgressEvent.SOCKET_DATA, this.onSocketData); |
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super.connect(this.proxyHost, this.proxyPort); |
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} |
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} |
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|
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private function onConnect(event:Event):void |
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{ |
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this.writeUTFBytes("CONNECT "+this.host+":"+this.port+" HTTP/1.1\n\n"); |
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this.flush(); |
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this.redirectConnectEvent(); |
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} |
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|
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private function onSocketData(event:ProgressEvent):void |
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{ |
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while (this.bytesAvailable != 0) |
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{ |
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this.buffer += this.readUTFBytes(1); |
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if (this.buffer.search(/\r?\n\r?\n$/) != -1) |
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{ |
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this.checkResponse(event); |
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break; |
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} |
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} |
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} |
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|
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private function checkResponse(event:ProgressEvent):void |
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{ |
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var responseCode:String = this.buffer.substr(this.buffer.indexOf(" ")+1, 3); |
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|
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if (responseCode.search(/^2/) == -1) |
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{ |
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var ioError:IOErrorEvent = new IOErrorEvent(IOErrorEvent.IO_ERROR); |
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ioError.text = "Error connecting to the proxy ["+this.proxyHost+"] on port ["+this.proxyPort+"]: " + this.buffer; |
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this.dispatchEvent(ioError); |
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} |
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else |
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{ |
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this.redirectSocketDataEvent(); |
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this.dispatchEvent(new Event(Event.CONNECT)); |
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if (this.bytesAvailable > 0) |
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{ |
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this.dispatchEvent(event); |
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} |
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} |
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this.buffer = null; |
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} |
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|
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private function redirectConnectEvent():void |
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{ |
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super.removeEventListener(Event.CONNECT, onConnect); |
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var deferredEventHandler:Object = this.deferredEventHandlers[Event.CONNECT]; |
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if (deferredEventHandler != null) |
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{ |
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super.addEventListener(Event.CONNECT, deferredEventHandler.listener, deferredEventHandler.useCapture, deferredEventHandler.priority, deferredEventHandler.useWeakReference); |
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} |
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} |
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|
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private function redirectSocketDataEvent():void |
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{ |
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super.removeEventListener(ProgressEvent.SOCKET_DATA, onSocketData); |
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var deferredEventHandler:Object = this.deferredEventHandlers[ProgressEvent.SOCKET_DATA]; |
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if (deferredEventHandler != null) |
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{ |
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super.addEventListener(ProgressEvent.SOCKET_DATA, deferredEventHandler.listener, deferredEventHandler.useCapture, deferredEventHandler.priority, deferredEventHandler.useWeakReference); |
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} |
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} |
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|
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public override function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int=0.0, useWeakReference:Boolean=false):void |
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{ |
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if (type == Event.CONNECT || type == ProgressEvent.SOCKET_DATA) |
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{ |
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this.deferredEventHandlers[type] = {listener:listener,useCapture:useCapture, priority:priority, useWeakReference:useWeakReference}; |
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} |
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else |
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{ |
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super.addEventListener(type, listener, useCapture, priority, useWeakReference); |
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} |
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} |
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} |
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} |