봉인된 XMLHttp Object Pool and XMLHttp chunnel Pool

// ============ ajaxClass ( XMLHttp Object Pool and XMLHttp chunnel Pool ) ============



var Request = new function(){



this.pool = new Array();



this.getXMLHttp = function (chunnel)

{

	

   if(chunnel != null)

   {

      for (var a = 0; a < this.pool.length; a++)

      {

         if(this.pool[a]["chunnel"] == chunnel)

         {

	        if(this.pool[a]["obj"].readyState == 0 || this.pool[a]["obj"].readyState == 4)

            {

               return this.pool[a]["obj"];

            }

	        else 

	        {

               return "busy";

	        }

         }

      }

  

      this.pool[this.pool.length] = new Array();

      this.pool[this.pool.length - 1]["obj"] = this.createXMLHttp();

      this.pool[this.pool.length - 1]["chunnel"] = chunnel;

      return this.pool[this.pool.length - 1]["obj"];

   }

	

   for (var i = 0; i < this.pool.length; i++)

   {

      if(this.pool[i]["obj"].readyState == 0 || this.pool[i]["obj"].readyState == 4)

      {

         return this.pool[i]["obj"];

      }

   }

 

   this.pool[this.pool.length] = new Array();

   this.pool[this.pool.length - 1]["obj"] = this.createXMLHttp();

   this.pool[this.pool.length - 1]["chunnel"] = "";

   return this.pool[this.pool.length - 1]["obj"];



}





this.createXMLHttp = function ()

{

 

   if(window.XMLHttpRequest)

   {

      var xmlObj = new XMLHttpRequest();

   } 

   else 

   {

      var MSXML = ['Microsoft.XMLHTTP', 'MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];

      for(var n = 0; n < MSXML.length; n++)

      {

         try

         {

            var xmlObj = new ActiveXObject(MSXML[n]);        

            break;

         }

         catch(e)

         {

         }

      }

   } 

 

   return xmlObj;



}





this.reSend = function (url,data,callback,extra,chunnel)

{

   var objXMLHttp = this.getXMLHttp(chunnel) ;

 

   if(typeof(objXMLHttp) != "object")

   {

      return false ;

   }



   if(data == "")

   {

      objXMLHttp.open('GET' , url, true);

	  objXMLHttp.setRequestHeader("If-Modified-Since", 0); // no cache

      objXMLHttp.send('');

   }

   else 

   { 

      objXMLHttp.open('POST' , url, true);

	  objXMLHttp.setRequestHeader("If-Modified-Since", 0); // no cache

      objXMLHttp.setRequestHeader("Content-Length",data.length); 

      objXMLHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");

      objXMLHttp.send(data);

   }

 

   if(typeof(callback) == "function" )

   {

      objXMLHttp.onreadystatechange = function ()

      {

         if(objXMLHttp.readyState == 4)

         {

            if(objXMLHttp.status == 200 || objXMLHttp.status == 304)

            {

               if(extra != null)

			   {

			      callback(objXMLHttp,extra) ;

			   }

			   else

			   {

			      callback(objXMLHttp) ;

			   }

            }

//            else

//          {

//             alert("Error loading page
" + objXMLHttp.status + ":" + objXMLHttp.statusText);

//          }

         }

      }

   }



}



}