check in basic flex demo as basis to develop a client application

clients/flex/com/adobe/protocols/dict/util/SocketHelper.as

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+/*
+  Copyright (c) 2009, 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.protocols.dict.util
+{
+	import com.adobe.net.proxies.RFC2817Socket;
+	import flash.events.ProgressEvent;
+
+	public class SocketHelper
+		extends RFC2817Socket
+	{
+		private var terminator:String = "\r\n.\r\n";
+		private var buffer:String;
+		public static var COMPLETE_RESPONSE:String = "completeResponse";
+
+		public function SocketHelper()
+		{
+			super();
+			buffer = new String();
+			addEventListener(ProgressEvent.SOCKET_DATA, incomingData);
+		}
+
+		private function incomingData(event:ProgressEvent):void
+		{
+			buffer += readUTFBytes(bytesAvailable);
+			buffer = buffer.replace(/250[^\r\n]+\r\n/, ""); // Get rid of all 250s. Don't need them.
+			var codeStr:String = buffer.substring(0, 3);
+			if (!isNaN(parseInt(codeStr)))
+			{
+				var code:uint = uint(codeStr);
+				if (code == 150 || code >= 200)
+				{
+					buffer = buffer.replace("\r\n", this.terminator);
+				}
+			}
+
+			while (buffer.indexOf(this.terminator) != -1)
+			{
+				var chunk:String = buffer.substring(0, buffer.indexOf(this.terminator));
+				buffer = buffer.substring(chunk.length + this.terminator.length, buffer.length);
+				throwResponseEvent(chunk);
+			}
+		}
+		
+		private function throwResponseEvent(response:String):void
+		{
+			var responseEvent:CompleteResponseEvent = new CompleteResponseEvent(CompleteResponseEvent.COMPLETE_RESPONSE);
+			responseEvent.response = response;
+			dispatchEvent(responseEvent);			
+		}
+	}
+}