partial implementation of flash uploader

1 files changed, 198 insertions, 0 deletions

diff --git a/vendors/uploadify/com/adobe/net/proxies/RFC2817Socket.as b/vendors/uploadify/com/adobe/net/proxies/RFC2817Socket.as
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+++ b/vendors/uploadify/com/adobe/net/proxies/RFC2817Socket.as
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+/*

+  Copyright (c) 2008, Adobe Systems Incorporated

+  All rights reserved.

+

+  Redistribution and use in source and binary forms, with or without 

+  modification, are permitted provided that the following conditions are

+  met:

+

+  * Redistributions of source code must retain the above copyright notice, 

+    this list of conditions and the following disclaimer.

+  

+  * Redistributions in binary form must reproduce the above copyright

+    notice, this list of conditions and the following disclaimer in the 

+    documentation and/or other materials provided with the distribution.

+  

+  * Neither the name of Adobe Systems Incorporated nor the names of its 

+    contributors may be used to endorse or promote products derived from 

+    this software without specific prior written permission.

+

+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

+  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

+  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

+  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 

+  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

+  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

+  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

+  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

+  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

+  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

+  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+*/

+package com.adobe.net.proxies

+{

+	import flash.events.Event;

+	import flash.events.IOErrorEvent;

+	import flash.events.ProgressEvent;

+	import flash.net.Socket;

+

+	/**

+	 * This class allows TCP socket connections through HTTP proxies in accordance with

+	 * RFC 2817:

+	 * 

+	 * ftp://ftp.rfc-editor.org/in-notes/rfc2817.txt

+	 * 

+	 * It can also be used to make direct connections to a destination, as well. If you

+	 * pass the host and port into the constructor, no proxy will be used. You can also

+	 * call connect, passing in the host and the port, and if you didn't set the proxy

+	 * info, a direct connection will be made. A proxy is only used after you have called

+	 * the setProxyInfo function.

+	 * 

+	 * The connection to and negotiation with the proxy is completely hidden. All the

+	 * same events are thrown whether you are using a proxy or not, and the data you

+	 * receive from the target server will look exact as it would if you were connected

+	 * to it directly rather than through a proxy.

+	 * 

+	 * @author Christian Cantrell

+	 * 

+	 **/

+	public class RFC2817Socket

+		extends Socket

+	{

+		private var proxyHost:String = null;

+		private var host:String = null;

+		private var proxyPort:int = 0;

+		private var port:int = 0;

+		private var deferredEventHandlers:Object = new Object();

+		private var buffer:String = new String();

+

+		/**

+		 * Construct a new RFC2817Socket object. If you pass in the host and the port,

+		 * no proxy will be used. If you want to use a proxy, instantiate with no

+		 * arguments, call setProxyInfo, then call connect.

+		 **/

+		public function RFC2817Socket(host:String = null, port:int = 0)

+		{

+			super(host, port);

+		}

+		

+		/**

+		 * Set the proxy host and port number. Your connection will only proxied if

+		 * this function has been called.

+		 **/

+		public function setProxyInfo(host:String, port:int):void

+		{

+			this.proxyHost = host;

+			this.proxyPort = port;

+

+			var deferredSocketDataHandler:Object = this.deferredEventHandlers[ProgressEvent.SOCKET_DATA];

+			var deferredConnectHandler:Object = this.deferredEventHandlers[Event.CONNECT];

+

+			if (deferredSocketDataHandler != null)

+			{

+				super.removeEventListener(ProgressEvent.SOCKET_DATA, deferredSocketDataHandler.listener, deferredSocketDataHandler.useCapture);

+			}

+

+			if (deferredConnectHandler != null)

+			{

+				super.removeEventListener(Event.CONNECT, deferredConnectHandler.listener, deferredConnectHandler.useCapture);

+			}

+		}

+		

+		/**

+		 * Connect to the specified host over the specified port. If you want your

+		 * connection proxied, call the setProxyInfo function first.

+		 **/

+		public override function connect(host:String, port:int):void

+		{

+			if (this.proxyHost == null)

+			{

+				this.redirectConnectEvent();

+				this.redirectSocketDataEvent();

+				super.connect(host, port);

+			}

+			else

+			{

+				this.host = host;

+				this.port = port;

+				super.addEventListener(Event.CONNECT, this.onConnect);

+				super.addEventListener(ProgressEvent.SOCKET_DATA, this.onSocketData);

+				super.connect(this.proxyHost, this.proxyPort);

+			}

+		}

+

+		private function onConnect(event:Event):void

+		{

+			this.writeUTFBytes("CONNECT "+this.host+":"+this.port+" HTTP/1.1\n\n");

+			this.flush();

+			this.redirectConnectEvent();

+		}

+		

+		private function onSocketData(event:ProgressEvent):void

+		{

+			while (this.bytesAvailable != 0)

+			{

+				this.buffer += this.readUTFBytes(1);

+				if (this.buffer.search(/\r?\n\r?\n$/) != -1)

+				{

+					this.checkResponse(event);

+					break;

+				}

+			}

+		}

+		

+		private function checkResponse(event:ProgressEvent):void

+		{

+			var responseCode:String = this.buffer.substr(this.buffer.indexOf(" ")+1, 3);

+

+			if (responseCode.search(/^2/) == -1)

+			{

+				var ioError:IOErrorEvent = new IOErrorEvent(IOErrorEvent.IO_ERROR);

+				ioError.text = "Error connecting to the proxy ["+this.proxyHost+"] on port ["+this.proxyPort+"]: " + this.buffer;

+				this.dispatchEvent(ioError);

+			}

+			else

+			{

+				this.redirectSocketDataEvent();

+				this.dispatchEvent(new Event(Event.CONNECT));

+				if (this.bytesAvailable > 0)

+				{

+					this.dispatchEvent(event);

+				}

+			}

+			this.buffer = null;

+		}

+		

+		private function redirectConnectEvent():void

+		{

+			super.removeEventListener(Event.CONNECT, onConnect);

+			var deferredEventHandler:Object = this.deferredEventHandlers[Event.CONNECT];

+			if (deferredEventHandler != null)

+			{

+				super.addEventListener(Event.CONNECT, deferredEventHandler.listener, deferredEventHandler.useCapture, deferredEventHandler.priority, deferredEventHandler.useWeakReference);			

+			}

+		}

+		

+		private function redirectSocketDataEvent():void

+		{

+			super.removeEventListener(ProgressEvent.SOCKET_DATA, onSocketData);

+			var deferredEventHandler:Object = this.deferredEventHandlers[ProgressEvent.SOCKET_DATA];

+			if (deferredEventHandler != null)

+			{

+				super.addEventListener(ProgressEvent.SOCKET_DATA, deferredEventHandler.listener, deferredEventHandler.useCapture, deferredEventHandler.priority, deferredEventHandler.useWeakReference);			

+			}

+		}

+		

+		public override function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int=0.0, useWeakReference:Boolean=false):void

+		{

+			if (type == Event.CONNECT || type == ProgressEvent.SOCKET_DATA)

+			{

+				this.deferredEventHandlers[type] = {listener:listener,useCapture:useCapture, priority:priority, useWeakReference:useWeakReference};

+			}

+			else

+			{

+				super.addEventListener(type, listener, useCapture, priority, useWeakReference);

+			}

+		}

+	}

+}
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