diff --git a/README.md b/README.md
index 751d3a2..9411b3d 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,8 @@ Unified Node/XPCOM/JS client-side real-time communication with underlying implem
 * [WebSocket](https://en.wikipedia.org/wiki/WebSocket)
 
 
+**Note** `RT` is not only a simple framework around real-time layer implementations, it is also a small protocol additional to an implementation, which enables optimum performance, e.g by multiplexing multiple requests transparently (where applicable).
+
 
 **Example API**
 
@@ -48,7 +50,7 @@ var rt_chat = RT({
         <span class="message">' + textify( m.message ) + '</span>\
         </div>';
     })
-    /*.on('open', function( ){
+    /*.one('open', function( ){
         alert('OPENED');
     })*/
     .on('close', function( ){
diff --git a/src/RT.BOSH.js b/src/RT.BOSH.js
index a6b0cea..4acd90e 100644
--- a/src/RT.BOSH.js
+++ b/src/RT.BOSH.js
@@ -39,14 +39,14 @@ RT.Client.BOSH[PROTO].$queue$ = null;
 RT.Client.BOSH[PROTO].$mID$ = null;
 RT.Client.BOSH[PROTO].dispose = function( ){
     var self = this;
-    if ( self.$bosh$ ) { self.$bosh$.abort( false ); self.$bosh$ = null; }
+    if ( self.$bosh$ ) { self.$bosh$.abort( ); self.$bosh$ = null; }
     self.$queue$ = null;
     self.$mID$ = null;
     return __super__.dispose.call( self );
 };
 RT.Client.BOSH[PROTO].abort = function( trigger ){
     var self = this;
-    if ( self.$bosh$ ) { self.$bosh$.abort( true===trigger ); self.$bosh$ = null; }
+    if ( self.$bosh$ ) { self.$bosh$.abort( ); self.$bosh$ = null; }
     return __super__.abort.call( self, true===trigger );
 };
 RT.Client.BOSH[PROTO].send = function( payload ){
@@ -58,6 +58,7 @@ RT.Client.BOSH[PROTO].listen = function( ){
     var self = this;
     var listen = function listen( ) {
         var headers = {
+            'Connection'        : 'Keep-Alive',
             'Content-Type'      : 'application/x-www-form-urlencoded; charset=utf8',
             'X-RT--BOSH'        : '1', // this uses BOSH
             'X-RT--Receive'     : '1', // this is the receive channel
@@ -79,36 +80,46 @@ RT.Client.BOSH[PROTO].listen = function( ){
             //mimeType        : 'text/plain; charset=utf8',
             headers         : headers,
             onError         : function( xhr ) {
-                self.emit('error', xhr.statusText);
                 self.$bosh$ = null;
+                self.emit( 'error', xhr.statusText );
             },
             onTimeout       : function( xhr ) {
+                self.$bosh$ = null;
                 setTimeout( listen, 0 );
             },
             onComplete      : function( xhr ) {
-                var rt_msg = xhr.responseHeader( 'X-RT--Message' ),
-                    rt_close = xhr.responseHeader( 'X-RT--Close' ),
-                    rt_error = xhr.responseHeader( 'X-RT--Error' ),
-                    rt_mID = xhr.responseHeader( 'X-RT--mID' )
+                var rt_msg = xhr.getResponseHeader( 'X-RT--Message' ),
+                    rt_close = xhr.getResponseHeader( 'X-RT--Close' ),
+                    rt_error = xhr.getResponseHeader( 'X-RT--Error' ),
+                    rt_mID = xhr.getResponseHeader( 'X-RT--mID' )
                 ;
                 if ( rt_error )
                 {
+                    self.$bosh$ = null;
                     return self.emit( 'error', rt_error );
                 }
                 if ( rt_close )
                 {
+                    self.$bosh$ = null;
                     return self.close( );
                 }
+                
+                if ( rt_mID ) self.$mID$ = rt_mID;
+                // message(s) sent
+                if ( msgs ) self.$queue$.splice( 0, msgs.length );
+                
                 if ( rt_msg )
                 {
                     // at the same time, handle incoming message(s)
-                    var msgs = (xhr.responseText||'').split( rt_msg ), i, l;
-                    for(i=0,l=msgs.length; i<l; i++)
-                        self.emit('receive', msgs[i]);
+                    var received = (xhr.responseText||'').split( rt_msg ), i, l;
+                    for(i=0,l=received.length; i<l; i++) self.emit( 'receive', received[i] );
                 }
-                if ( rt_mID ) self.$mID$ = rt_mID;
-                // message(s) sent
-                if ( msgs ) self.$queue$.splice( 0, msgs.length );
+                else if ( !!xhr.responseText )
+                {
+                    self.emit( 'receive', xhr.responseText );
+                }
+                
+                self.$bosh$ = null;
                 setTimeout( listen, 0 );
             }
         }, msgs ? ('x-rt--payload='+U.Url.encode( msgs.join( rt_msg ) )) : null);
diff --git a/src/RT.BOSH.min.js b/src/RT.BOSH.min.js
index 556ee6f..70cfe8a 100644
--- a/src/RT.BOSH.min.js
+++ b/src/RT.BOSH.min.js
@@ -7,4 +7,4 @@
 *  https://github.com/foo123/RT
 *
 **/
-!function(e,t){"use strict";"object"==typeof exports?t(require("./RT.js")):t(e.RT)&&"function"==typeof define&&define.amd&&define(function(){return e.RT})}(this,function(e){"use strict";var t="prototype",n=(Object[t].toString,e.Client[t]),o=e.Util,r=e.XHR;return e.Client.BOSH=function i(e){var t=this;return t instanceof i?(n.constructor.call(t,e),t.$cfg$.timeout=t.$cfg$.timeout||1e3,t.$bosh$=null,t.$queue$=[],void(t.$mID$=0)):new i(e)},e.Client.Impl.bosh=e.Client.Impl["long-poll"]=e.Client.BOSH,e.Client.BOSH[t]=Object.create(n),e.Client.BOSH[t].constructor=e.Client.BOSH,e.Client.BOSH[t].$bosh$=null,e.Client.BOSH[t].$queue$=null,e.Client.BOSH[t].$mID$=null,e.Client.BOSH[t].dispose=function(){var e=this;return e.$bosh$&&(e.$bosh$.abort(!1),e.$bosh$=null),e.$queue$=null,e.$mID$=null,n.dispose.call(e)},e.Client.BOSH[t].abort=function(e){var t=this;return t.$bosh$&&(t.$bosh$.abort(!0===e),t.$bosh$=null),n.abort.call(t,!0===e)},e.Client.BOSH[t].send=function(e){var t=this;return t.$queue$.push(String(e)),t},e.Client.BOSH[t].listen=function(){var t=this,n=function i(){var n={"Content-Type":"application/x-www-form-urlencoded; charset=utf8","X-RT--BOSH":"1","X-RT--Receive":"1","X-RT--mID":t.$mID$},l=null,u=null;t.$queue$.length&&(n["X-RT--Send"]="x-rt--payload",n["X-RT--Message"]=l=e.UUID("--------_rt_msg_","_--------"),u=t.$queue$.slice()),t.$bosh$=r.create({url:t.$cfg$.endpoint+(-1<t.$cfg$.endpoint.indexOf("?")?"&":"?")+"__nocache__="+(new Date).getTime(),timeout:t.$cfg$.timeout,method:"POST",responseType:"text",headers:n,onError:function(e){t.emit("error",e.statusText),t.$bosh$=null},onTimeout:function(e){setTimeout(i,0)},onComplete:function(e){var n=e.responseHeader("X-RT--Message"),o=e.responseHeader("X-RT--Close"),r=e.responseHeader("X-RT--Error"),l=e.responseHeader("X-RT--mID");if(r)return t.emit("error",r);if(o)return t.close();if(n){var u,s,$=(e.responseText||"").split(n);for(u=0,s=$.length;s>u;u++)t.emit("receive",$[u])}l&&(t.$mID$=l),$&&t.$queue$.splice(0,$.length),setTimeout(i,0)}},u?"x-rt--payload="+o.Url.encode(u.join(l)):null)};return setTimeout(n,0),t.open()},e});
\ No newline at end of file
+!function(e,t){"use strict";"object"==typeof exports?t(require("./RT.js")):t(e.RT)&&"function"==typeof define&&define.amd&&define(function(){return e.RT})}(this,function(e){"use strict";var t="prototype",n=(Object[t].toString,e.Client[t]),o=e.Util,i=e.XHR;return e.Client.BOSH=function l(e){var t=this;return t instanceof l?(n.constructor.call(t,e),t.$cfg$.timeout=t.$cfg$.timeout||1e3,t.$bosh$=null,t.$queue$=[],void(t.$mID$=0)):new l(e)},e.Client.Impl.bosh=e.Client.Impl["long-poll"]=e.Client.BOSH,e.Client.BOSH[t]=Object.create(n),e.Client.BOSH[t].constructor=e.Client.BOSH,e.Client.BOSH[t].$bosh$=null,e.Client.BOSH[t].$queue$=null,e.Client.BOSH[t].$mID$=null,e.Client.BOSH[t].dispose=function(){var e=this;return e.$bosh$&&(e.$bosh$.abort(),e.$bosh$=null),e.$queue$=null,e.$mID$=null,n.dispose.call(e)},e.Client.BOSH[t].abort=function(e){var t=this;return t.$bosh$&&(t.$bosh$.abort(),t.$bosh$=null),n.abort.call(t,!0===e)},e.Client.BOSH[t].send=function(e){var t=this;return t.$queue$.push(String(e)),t},e.Client.BOSH[t].listen=function(){var t=this,n=function l(){var n={Connection:"Keep-Alive","Content-Type":"application/x-www-form-urlencoded; charset=utf8","X-RT--BOSH":"1","X-RT--Receive":"1","X-RT--mID":t.$mID$},r=null,s=null;t.$queue$.length&&(n["X-RT--Send"]="x-rt--payload",n["X-RT--Message"]=r=e.UUID("--------_rt_msg_","_--------"),s=t.$queue$.slice()),t.$bosh$=i.create({url:t.$cfg$.endpoint+(-1<t.$cfg$.endpoint.indexOf("?")?"&":"?")+"__nocache__="+(new Date).getTime(),timeout:t.$cfg$.timeout,method:"POST",responseType:"text",headers:n,onError:function(e){t.$bosh$=null,t.emit("error",e.statusText)},onTimeout:function(e){t.$bosh$=null,setTimeout(l,0)},onComplete:function(e){var n=e.getResponseHeader("X-RT--Message"),o=e.getResponseHeader("X-RT--Close"),i=e.getResponseHeader("X-RT--Error"),r=e.getResponseHeader("X-RT--mID");if(i)return t.$bosh$=null,t.emit("error",i);if(o)return t.$bosh$=null,t.close();if(r&&(t.$mID$=r),s&&t.$queue$.splice(0,s.length),n){var u,$,c=(e.responseText||"").split(n);for(u=0,$=c.length;$>u;u++)t.emit("receive",c[u])}else e.responseText&&t.emit("receive",e.responseText);t.$bosh$=null,setTimeout(l,0)}},s?"x-rt--payload="+o.Url.encode(s.join(r)):null)};return setTimeout(n,0),t.open()},e});
\ No newline at end of file
diff --git a/src/RT.Poll.js b/src/RT.Poll.js
index a0e1042..550cbd3 100644
--- a/src/RT.Poll.js
+++ b/src/RT.Poll.js
@@ -42,7 +42,7 @@ RT.Client.Poll[PROTO].$mID$ = null;
 RT.Client.Poll[PROTO].dispose = function( ){
     var self = this;
     if ( self.$timer$ ) { clearTimeout( self.$timer$ ); self.$timer$ = null; }
-    if ( self.$xhr$ ) { self.$xhr$.abort( false ); self.$xhr$ = null; }
+    if ( self.$xhr$ ) { self.$xhr$.abort( ); self.$xhr$ = null; }
     self.$mID$ = null;
     self.$queue$ = null;
     return __super__.dispose.call( self );
@@ -50,7 +50,7 @@ RT.Client.Poll[PROTO].dispose = function( ){
 RT.Client.Poll[PROTO].abort = function( trigger ){
     var self = this;
     if ( self.$timer$ ) { clearTimeout( self.$timer$ ); self.$timer$ = null; }
-    if ( self.$xhr$ ) { self.$xhr$.abort( true===trigger ); self.$xhr$ = null; }
+    if ( self.$xhr$ ) { self.$xhr$.abort( ); self.$xhr$ = null; }
     return __super__.abort.call( self, true===trigger );
 };
 RT.Client.Poll[PROTO].send = function( payload ){
@@ -82,35 +82,47 @@ RT.Client.Poll[PROTO].listen = function( ){
             //mimeType        : 'text/plain; charset=utf8',
             headers         : headers,
             onError         : function( xhr ) {
+                self.$xhr$ = null;
                 self.emit( 'error', xhr.statusText );
             },
             onTimeout       : function( xhr ) {
+                self.$xhr$ = null;
                 self.$timer$ = setTimeout( poll, self.$cfg$.pollInterval );
             },
             onComplete      : function( xhr ) {
-                var rt_msg = xhr.responseHeader( 'X-RT--Message' ),
-                    rt_close = xhr.responseHeader( 'X-RT--Close' ),
-                    rt_error = xhr.responseHeader( 'X-RT--Error' ),
-                    rt_mID = xhr.responseHeader( 'X-RT--mID' )
+                var rt_msg = xhr.getResponseHeader( 'X-RT--Message' ),
+                    rt_close = xhr.getResponseHeader( 'X-RT--Close' ),
+                    rt_error = xhr.getResponseHeader( 'X-RT--Error' ),
+                    rt_mID = xhr.getResponseHeader( 'X-RT--mID' )
                 ;
                 if ( rt_error )
                 {
+                    self.$xhr$ = null;
                     return self.emit( 'error', rt_error );
                 }
                 if ( rt_close )
                 {
+                    self.$xhr$ = null;
                     return self.close( );
                 }
+                
+                if ( rt_mID ) self.$mID$ = rt_mID;
+                // message(s) sent
+                if ( msgs ) self.$queue$.splice( 0, msgs.length );
+                
                 if ( rt_msg )
                 {
                     // at the same time, handle incoming message(s)
-                    var msgs = (xhr.responseText||'').split( rt_msg ), i, l;
-                    for(i=0,l=msgs.length; i<l; i++) self.emit( 'receive', msgs[i] );
+                    var received = (xhr.responseText||'').split( rt_msg ), i, l;
+                    for(i=0,l=received.length; i<l; i++) self.emit( 'receive', received[i] );
                 }
-                if ( rt_mID ) self.$mID$ = rt_mID;
-                // message(s) sent
-                if ( msgs ) self.$queue$.splice( 0, msgs.length );
-                self.$timer$ = setTimeout(poll, self.$cfg$.pollInterval);
+                else if ( !!xhr.responseText )
+                {
+                    self.emit( 'receive', xhr.responseText );
+                }
+                
+                self.$xhr$ = null;
+                self.$timer$ = setTimeout( poll, self.$cfg$.pollInterval );
             }
         }, msgs ? ('x-rt--payload='+U.Url.encode( msgs.join( rt_msg ) )) : null);
     };
diff --git a/src/RT.Poll.min.js b/src/RT.Poll.min.js
index c663fa7..90c93a0 100644
--- a/src/RT.Poll.min.js
+++ b/src/RT.Poll.min.js
@@ -7,4 +7,4 @@
 *  https://github.com/foo123/RT
 *
 **/
-!function(e,t){"use strict";"object"==typeof exports?t(require("./RT.js")):t(e.RT)&&"function"==typeof define&&define.amd&&define(function(){return e.RT})}(this,function(e){"use strict";var t="prototype",l=(Object[t].toString,e.Client[t]),n=e.Util,r=e.XHR;return e.Client.Poll=function o(e){var t=this;return t instanceof o?(l.constructor.call(t,e),t.$cfg$.pollInterval=t.$cfg$.pollInterval||1e3,t.$timer$=null,t.$xhr$=null,t.$mID$=0,void(t.$queue$=[])):new o(e)},e.Client.Impl.poll=e.Client.Impl["short-poll"]=e.Client.Poll,e.Client.Poll[t]=Object.create(l),e.Client.Poll[t].constructor=e.Client.Poll,e.Client.Poll[t].$timer$=null,e.Client.Poll[t].$xhr$=null,e.Client.Poll[t].$queue$=null,e.Client.Poll[t].$mID$=null,e.Client.Poll[t].dispose=function(){var e=this;return e.$timer$&&(clearTimeout(e.$timer$),e.$timer$=null),e.$xhr$&&(e.$xhr$.abort(!1),e.$xhr$=null),e.$mID$=null,e.$queue$=null,l.dispose.call(e)},e.Client.Poll[t].abort=function(e){var t=this;return t.$timer$&&(clearTimeout(t.$timer$),t.$timer$=null),t.$xhr$&&(t.$xhr$.abort(!0===e),t.$xhr$=null),l.abort.call(t,!0===e)},e.Client.Poll[t].send=function(e){var t=this;return t.$queue$.push(String(e)),t},e.Client.Poll[t].listen=function(){var t=this,l=function o(){var l={"Content-Type":"application/x-www-form-urlencoded; charset=utf8","X-RT--Poll":"1","X-RT--Receive":"1","X-RT--mID":t.$mID$},i=null,$=null;t.$queue$.length&&(l["X-RT--Send"]="x-rt--payload",l["X-RT--Message"]=i=e.UUID("--------_rt_msg_","_--------"),$=t.$queue$.slice()),t.$xhr$=r.create({url:t.$cfg$.endpoint+(-1<t.$cfg$.endpoint.indexOf("?")?"&":"?")+"__nocache__="+(new Date).getTime(),method:"POST",responseType:"text",headers:l,onError:function(e){t.emit("error",e.statusText)},onTimeout:function(e){t.$timer$=setTimeout(o,t.$cfg$.pollInterval)},onComplete:function(e){var l=e.responseHeader("X-RT--Message"),n=e.responseHeader("X-RT--Close"),r=e.responseHeader("X-RT--Error"),i=e.responseHeader("X-RT--mID");if(r)return t.emit("error",r);if(n)return t.close();if(l){var $,u,s=(e.responseText||"").split(l);for($=0,u=s.length;u>$;$++)t.emit("receive",s[$])}i&&(t.$mID$=i),s&&t.$queue$.splice(0,s.length),t.$timer$=setTimeout(o,t.$cfg$.pollInterval)}},$?"x-rt--payload="+n.Url.encode($.join(i)):null)};return t.$timer$=setTimeout(l,0),t.open()},e});
\ No newline at end of file
+!function(e,t){"use strict";"object"==typeof exports?t(require("./RT.js")):t(e.RT)&&"function"==typeof define&&define.amd&&define(function(){return e.RT})}(this,function(e){"use strict";var t="prototype",l=(Object[t].toString,e.Client[t]),n=e.Util,r=e.XHR;return e.Client.Poll=function o(e){var t=this;return t instanceof o?(l.constructor.call(t,e),t.$cfg$.pollInterval=t.$cfg$.pollInterval||1e3,t.$timer$=null,t.$xhr$=null,t.$mID$=0,void(t.$queue$=[])):new o(e)},e.Client.Impl.poll=e.Client.Impl["short-poll"]=e.Client.Poll,e.Client.Poll[t]=Object.create(l),e.Client.Poll[t].constructor=e.Client.Poll,e.Client.Poll[t].$timer$=null,e.Client.Poll[t].$xhr$=null,e.Client.Poll[t].$queue$=null,e.Client.Poll[t].$mID$=null,e.Client.Poll[t].dispose=function(){var e=this;return e.$timer$&&(clearTimeout(e.$timer$),e.$timer$=null),e.$xhr$&&(e.$xhr$.abort(),e.$xhr$=null),e.$mID$=null,e.$queue$=null,l.dispose.call(e)},e.Client.Poll[t].abort=function(e){var t=this;return t.$timer$&&(clearTimeout(t.$timer$),t.$timer$=null),t.$xhr$&&(t.$xhr$.abort(),t.$xhr$=null),l.abort.call(t,!0===e)},e.Client.Poll[t].send=function(e){var t=this;return t.$queue$.push(String(e)),t},e.Client.Poll[t].listen=function(){var t=this,l=function o(){var l={"Content-Type":"application/x-www-form-urlencoded; charset=utf8","X-RT--Poll":"1","X-RT--Receive":"1","X-RT--mID":t.$mID$},i=null,$=null;t.$queue$.length&&(l["X-RT--Send"]="x-rt--payload",l["X-RT--Message"]=i=e.UUID("--------_rt_msg_","_--------"),$=t.$queue$.slice()),t.$xhr$=r.create({url:t.$cfg$.endpoint+(-1<t.$cfg$.endpoint.indexOf("?")?"&":"?")+"__nocache__="+(new Date).getTime(),method:"POST",responseType:"text",headers:l,onError:function(e){t.$xhr$=null,t.emit("error",e.statusText)},onTimeout:function(e){t.$xhr$=null,t.$timer$=setTimeout(o,t.$cfg$.pollInterval)},onComplete:function(e){var l=e.getResponseHeader("X-RT--Message"),n=e.getResponseHeader("X-RT--Close"),r=e.getResponseHeader("X-RT--Error"),i=e.getResponseHeader("X-RT--mID");if(r)return t.$xhr$=null,t.emit("error",r);if(n)return t.$xhr$=null,t.close();if(i&&(t.$mID$=i),$&&t.$queue$.splice(0,$.length),l){var u,s,c=(e.responseText||"").split(l);for(u=0,s=c.length;s>u;u++)t.emit("receive",c[u])}else e.responseText&&t.emit("receive",e.responseText);t.$xhr$=null,t.$timer$=setTimeout(o,t.$cfg$.pollInterval)}},$?"x-rt--payload="+n.Url.encode($.join(i)):null)};return t.$timer$=setTimeout(l,0),t.open()},e});
\ No newline at end of file
diff --git a/src/RT.js b/src/RT.js
index 7e94f8e..0e54f7a 100644
--- a/src/RT.js
+++ b/src/RT.js
@@ -24,11 +24,6 @@ var PROTO = 'prototype', HAS = 'hasOwnProperty',
         ? function( s ) { return s.trim( ); }
         : function( s ) { return s.replace(trim_re, ''); },
     a2b_re = /[^A-Za-z0-9\+\/\=]/g, hex_re = /\x0d\x0a/g,
-    XHR = isNode
-    ? null
-    : (window.XMLHttpRequest
-    ? function( ){ return new XMLHttpRequest( ); }
-    : function( ){ return new ActiveXObject('Microsoft.XMLHTTP'); /* or ActiveXObject('Msxml2.XMLHTTP'); ??*/ }),
     UUID = 0
 ;
 
@@ -38,196 +33,133 @@ function RT( cfg )
     var type = (cfg.use || cfg.rt_type || 'default').toLowerCase( );
     return RT.Client.Impl[HAS](type) ? new RT.Client.Impl[type]( cfg ) : new RT.Client( cfg );
 }
+
 RT.VERSION = '1.0.0';
 
 RT.Platform = {
     Node: isNode
 };
 
-RT.XHR = {
-    create: function( o, payload ) {
+RT.XHR = function XHR( send, abort ){
+    var xhr = this, aborted = false;
+    xhr.readyState = XHR.UNSENT;
+    xhr.status = null;
+    xhr.statusText = null;
+    xhr.responseType = 'text';
+    xhr.responseURL = null;
+    xhr.response = null;
+    xhr.responseText = null;
+    xhr.responseXml = null;
+    xhr._rawHeaders = null;
+    xhr._headers = null;
+    xhr.send = function( payload ) {
+        if ( aborted || (XHR.UNSENT !== xhr.readyState) ) return xhr;
+        if ( send ) send( payload );
+        xhr.readyState = XHR.OPENED;
+        return xhr;
+    };
+    xhr.abort = function( ){
+        if ( aborted ) return;
+        aborted = true;
+        if ( abort ) abort( );
+        return xhr;
+    };
+    xhr.getAllResponseHeaders = function( decoded ) {
+        if ( XHR.DONE !== xhr.readyState ) return null;
+        return true===decoded ? xhr._headers : xhr._rawHeaders;
+    };
+    xhr.getResponseHeader = function( key ) {
+        if ( (null == key) || (XHR.DONE !== xhr.readyState) ) return null;
+        var headers = xhr._headers || {};
+        return headers[HAS](key) ? headers[key] : null;
+    };
+    xhr.dispose = function( ) {
+        xhr.readyState = null;
+        xhr.status = null;
+        xhr.statusText = null;
+        xhr.responseType = null;
+        xhr.responseURL = null;
+        xhr.response = null;
+        xhr.responseText = null;
+        xhr.responseXml = null;
+        xhr._rawHeaders = null;
+        xhr._headers = null;
+        //xhr.send = null;
+        //xhr.abort = null;
+        return xhr;
+    };
+};
+RT.XHR.UNSENT = 0;
+RT.XHR.OPENED = 1;
+RT.XHR.HEADERS_RECEIVED = 2;
+RT.XHR.LOADING = 3;
+RT.XHR.DONE = 4;
+RT.XHR.create = isNode
+    ? function( o, payload ) {
         o = o || {};
-        if ( isNode )
-        {
-            if ( !o.url ) return null;
-            var url = '[object Object]' === toString.call(o.url) ? o.url : require('url').parse( o.url ),
-                
-                options = {
-                    method      : o.method || 'GET',
-                    agent       : false,
-                    protocol    : url.protocol,
-                    host        : url.hostname,
-                    hostname    : url.hostname,
-                    port        : url.port || 80,
-                    path        : (url.pathname||'/')+(url.query?('?'+url.query):'')
-                },
-                request =  'https:' === options.protocol ? require('https').request : require('http').request,
-                
-                xhr = {
-                    readyState: 0 /*UNSENT*/,
-                    status: null,
-                    statusText: null,
-                    responseType: o.responseType || 'text',
-                    responseURL: null,
-                    response: null,
-                    responseText: null,
-                    responseXml: null,
-                    headers: null,
-                    __headers__: null,
-                    send: function( payload ) {
-                        if ( null != payload )
-                        {
-                            payload = String( payload );
-                            hr.setHeader( 'Content-Length', payload.length.toString() );
-                            hr.write( payload );
-                        }
-                        hr.end( );
-                    },
-                    abort: function( ) {
-                        hr.abort( );
-                    },
-                    getAllResponseHeaders: function( ) {
-                        return xhr.headers;
-                    },
-                    getResponseHeader: function( key ) {
-                        if ( (null == key) || (4/*DONE*/ !== xhr.readyState) ) return null;
-                        var headers = xhr.__headers__ || {};
-                        return headers[HAS](key) ? headers[key] : null;
-                    },
-                    responseHeader: function( key ) {
-                        return xhr.getResponseHeader( key );
-                    },
-                    responseHeaders: function( decoded ) {
-                        if ( 4/*DONE*/ !== xhr.readyState ) return null;
-                        return true===decoded ? xhr.__headers__ : xhr.headers;
-                    }
-                },
-                
-                hr = request(options, function( response ) {
-                    var xdata = '', data_sent = 0;
-                    xhr.readyState = 1; /*OPENED*/
-                    if ( o.onStateChange ) o.onStateChange( xhr );
-                    xhr.headers = response.rawHeaders.join("\r\n");
-                    xhr.__headers__ = response.headers;
-                    xhr.responseURL = response.url || null;
-                    xhr.readyState = 2; /*HEADERS_RECEIVED*/
-                    xhr.status = response.statusCode || null;
-                    xhr.statusText = response.statusMessage || null;
-                    if ( o.onStateChange ) o.onStateChange( xhr );
-                    response.on('data', function( chunk ){
-                        xdata += chunk.toString( );
-                        if ( !data_sent )
-                        {
-                            data_sent = 1;
-                            xhr.readyState = 3; /*LOADING*/
-                            if ( o.onStateChange ) o.onStateChange( xhr );
-                            if ( o.onLoadStart ) o.onLoadStart( xhr );
-                        }
-                        if ( o.onProgress ) o.onProgress( xhr );
-                    });
-                    response.on('end', function( ){
-                        xhr.readyState = 4; /*DONE*/
-                        xhr.responseType = 'text';
-                        xhr.response = xhr.responseText = xdata;
-                        if ( o.onStateChange ) o.onStateChange( xhr );
-                        if ( o.onLoadEnd ) o.onLoadEnd( xhr );
-                        if ( (4/*DONE*/ === xhr.readyState) )
-                        {
-                            if ( 200 === xhr.status )
-                            {
-                                if ( o.onComplete ) o.onComplete( xhr );
-                            }
-                            else
-                            {
-                                if ( o.onRequestError ) o.onRequestError( xhr );
-                                else if ( o.onError ) o.onError( xhr );
-                            }
-                        }
-                    });
-                    response.on('error', function( ee ){
-                        xhr.statusText = ee.toString( );
-                        if ( o.onError ) o.onError( xhr );
-                    });
-                })
-            ;
-            hr.setTimeout(o.timeout || 30000, function( e ){
-                if ( o.onTimeout ) o.onTimeout( xhr );
-            });
-            hr.on('abort', function( ee ){
-                if ( o.onAbort ) o.onAbort( xhr );
-            });
-            hr.on('error', function( ee ){
-                xhr.statusText = ee.toString( );
-                if ( o.onError ) o.onError( xhr );
-            });
-            
-            if ( o.headers ) RT.Util.Header.encode( o.headers, null, hr );
-            //if ( o.mimeType ) hr.overrideMimeType( o.mimeType );
-            hr.setHeader('Connection', 'Keep-Alive');
-            
-            if ( arguments.length > 1 ) xhr.send( payload );
-            return xhr;
-        }
-        else
-        {
-            var xhr = XHR( ), trigger_abort = true;
-            xhr._abort = xhr.abort;
-            xhr._aborted = false;
-            xhr.abort = function( and_trigger ){
-                if ( xhr._aborted ) return;
-                if ( false === and_trigger ) trigger_abort = false;
-                try{ xhr._abort( ); }catch(e){ }
-                xhr._aborted = true;
-                trigger_abort = true;
-            };
-            xhr.__headers__ = null;
-            xhr.responseHeader = function( key ) {
-                if ( (null == key) || (4/*DONE*/ !== xhr.readyState) ) return null;
-                return xhr.getResponseHeader( key );
-                /*var headers = xhr.getAllResponseHeaders( ) || '';
-                if ( null == xhr.__headers__ ) xhr.__headers__ = RT.Util.Header.decode( headers );
-                return xhr.__headers__[HAS](key) ? xhr.__headers__[key] : null;*/
-            };
-            xhr.responseHeaders = function( decoded ) {
-                if ( 4/*DONE*/ !== xhr.readyState ) return null;
-                var headers = xhr.getAllResponseHeaders( ) || '';
-                if ( null == xhr.__headers__ ) xhr.__headers__ = RT.Util.Header.decode( headers );
-                return true===decoded ? xhr.__headers__ : headers;
-            };
-            if ( !o.url ) return xhr;
-            xhr.open( o.method||'GET', o.url, !o.sync );
-            xhr.responseType = o.responseType || 'text';
-            if ( o.headers ) RT.Util.Header.encode( o.headers, xhr );
-            if ( o.mimeType ) xhr.overrideMimeType( o.mimeType );
-            //xhr.setRequestHeader('Content-Type', 'text/plain; charset=utf8');
-            //xhr.overrideMimeType('text/plain; charset=utf8');
-            xhr.timeout = o.timeout || 30000; // 30 secs default timeout
-            if ( o.onProgress )
-            {
-                xhr.onprogress = function( ) {
-                    o.onProgress( xhr );
-                };
-            }
-            if ( o.onLoadStart )
-            {
-                xhr.onloadstart = function( ) {
-                    o.onLoadStart( xhr );
-                };
+        if ( !o.url ) return null;
+        var url = '[object Object]' === toString.call(o.url) ? o.url : require('url').parse( o.url ),
+            $hr$, xhr,
+            options = {
+                method      : o.method || 'GET',
+                agent       : false,
+                protocol    : url.protocol,
+                host        : url.hostname,
+                hostname    : url.hostname,
+                port        : url.port || 80,
+                path        : (url.pathname||'/')+(url.query?('?'+url.query):'')
             }
-            if ( o.onLoadEnd )
+        ;
+        
+        xhr = new RT.XHR(
+        function( payload ) {
+            if ( null != payload )
             {
-                xhr.onloadend = function( ) {
-                    o.onLoadEnd( xhr );
-                };
+                payload = String( payload );
+                $hr$.setHeader( 'Content-Length', payload.length.toString() );
+                $hr$.write( payload );
             }
-            if ( !o.sync && o.onStateChange )
-            {
-                xhr.onreadystatechange = function( ) {
-                    o.onStateChange( xhr );
-                };
-            }
-            xhr.onload = function( ) {
-                if ( (4/*DONE*/ === xhr.readyState) )
+            $hr$.end( );
+        },
+        function( ) {
+            $hr$.abort( );
+        });
+        
+        $hr$ = ('https:'===options.protocol?require('https').request:require('http').request)(options, function( response ) {
+            var xdata = '', data_sent = 0;
+            
+            xhr.readyState = RT.XHR.OPENED;
+            if ( o.onStateChange ) o.onStateChange( xhr );
+            
+            xhr.readyState = RT.XHR.HEADERS_RECEIVED;
+            xhr._rawHeaders = response.rawHeaders.join("\r\n");
+            xhr._headers = response.headers;
+            xhr.responseURL = response.url || null;
+            xhr.status = response.statusCode || null;
+            xhr.statusText = response.statusMessage || null;
+            if ( o.onStateChange ) o.onStateChange( xhr );
+            
+            response.on('data', function( chunk ){
+                xdata += chunk.toString( );
+                if ( !data_sent )
+                {
+                    data_sent = 1;
+                    xhr.readyState = RT.XHR.LOADING;
+                    if ( o.onStateChange ) o.onStateChange( xhr );
+                    if ( o.onLoadStart ) o.onLoadStart( xhr );
+                }
+                if ( o.onProgress ) o.onProgress( xhr );
+            });
+            
+            response.on('end', function( ){
+                xhr.readyState = RT.XHR.DONE;
+                xhr.responseType = 'text';
+                xhr.response = xhr.responseText = xdata;
+                
+                if ( o.onStateChange ) o.onStateChange( xhr );
+                if ( o.onLoadEnd ) o.onLoadEnd( xhr );
+                
+                if ( (RT.XHR.DONE === xhr.readyState) )
                 {
                     if ( 200 === xhr.status )
                     {
@@ -239,21 +171,125 @@ RT.XHR = {
                         else if ( o.onError ) o.onError( xhr );
                     }
                 }
+            });
+            
+            response.on('error', function( ee ){
+                xhr.statusText = ee.toString( );
+                if ( o.onError ) o.onError( xhr );
+            });
+        });
+        
+        $hr$.setTimeout(o.timeout || 30000, function( e ){
+            if ( o.onTimeout ) o.onTimeout( xhr );
+        });
+        $hr$.on('abort', function( ee ){
+            if ( o.onAbort ) o.onAbort( xhr );
+        });
+        $hr$.on('error', function( ee ){
+            xhr.statusText = ee.toString( );
+            if ( o.onError ) o.onError( xhr );
+        });
+        
+        if ( o.headers ) RT.Util.Header.encode( o.headers, null, $hr$ );
+        //if ( o.mimeType ) $hr$.overrideMimeType( o.mimeType );
+        if ( arguments.length > 1 ) xhr.send( payload );
+        return xhr;
+    }
+    : function( o, payload ) {
+        o = o || {};
+        if ( !o.url ) return null;
+        var $xhr$ = window.XMLHttpRequest
+            ? new XMLHttpRequest( )
+            : new ActiveXObject( 'Microsoft.XMLHTTP' ) /* or ActiveXObject( 'Msxml2.XMLHTTP' ); ??*/,
+            
+            xhr = new RT.XHR(
+            function( payload ){
+                $xhr$.send( payload );
+            },
+            function( ){
+                $xhr$.abort( );
+            }),
+            
+            update = function( xhr, $xhr$ ) {
+                xhr.readyState = $xhr$.readyState;
+                xhr.responseType = $xhr$.responseType;
+                xhr.responseURL = $xhr$.responseURL;
+                xhr.response = $xhr$.response;
+                xhr.responseText = $xhr$.responseText;
+                xhr.responseXml = $xhr$.responseXml;
+                xhr.status = $xhr$.status;
+                xhr.statusText = $xhr$.statusText;
+                return xhr;
+            }
+        ;
+        xhr.getAllResponseHeaders = function( decoded ){
+            var headers = $xhr$.getAllResponseHeaders( );
+            return true===decoded ? RT.Util.Header.decode( headers ) : headers;
+        };
+        xhr.getResponseHeader = function( key ){
+            return $xhr$.getResponseHeader( key );
+        };
+        
+        $xhr$.open( o.method||'GET', o.url, !o.sync );
+        xhr.responseType = $xhr$.responseType = o.responseType || 'text';
+        $xhr$.timeout = o.timeout || 30000; // 30 secs default timeout
+        
+        if ( o.onProgress )
+        {
+            $xhr$.onprogress = function( ) {
+                update( xhr, $xhr$ );
+                o.onProgress( xhr );
             };
-            xhr.onabort = function( ) {
-                if ( trigger_abort && o.onAbort ) o.onAbort( xhr );
+        }
+        if ( o.onLoadStart )
+        {
+            $xhr$.onloadstart = function( ) {
+                o.onLoadStart( update( xhr, $xhr$ ) );
             };
-            xhr.onerror = function( ) {
-                if ( o.onError ) o.onError( xhr );
+        }
+        if ( o.onLoadEnd )
+        {
+            $xhr$.onloadend = function( ) {
+                o.onLoadEnd( update( xhr, $xhr$ ) );
             };
-            xhr.ontimeout = function( ) {
-                if ( o.onTimeout ) o.onTimeout( xhr );
+        }
+        if ( !o.sync && o.onStateChange )
+        {
+            $xhr$.onreadystatechange = function( ) {
+                o.onStateChange( update( xhr, $xhr$ ) );
             };
-            if ( arguments.length > 1 ) xhr.send( payload );
-            return xhr;
         }
+        $xhr$.onload = function( ) {
+            update( xhr, $xhr$ );
+            if ( (RT.XHR.DONE === $xhr$.readyState) )
+            {
+                if ( 200 === $xhr$.status )
+                {
+                    if ( o.onComplete ) o.onComplete( xhr );
+                }
+                else
+                {
+                    if ( o.onRequestError ) o.onRequestError( xhr );
+                    else if ( o.onError ) o.onError( xhr );
+                }
+            }
+        };
+        $xhr$.onabort = function( ) {
+            if ( o.onAbort ) o.onAbort( update( xhr, $xhr$ ) );
+        };
+        $xhr$.onerror = function( ) {
+            if ( o.onError ) o.onError( update( xhr, $xhr$ ) );
+        };
+        $xhr$.ontimeout = function( ) {
+            if ( o.onTimeout ) o.onTimeout( update( xhr, $xhr$ ) );
+        };
+        
+        if ( o.headers ) RT.Util.Header.encode( o.headers, $xhr$ );
+        if ( o.mimeType ) $xhr$.overrideMimeType( o.mimeType );
+        if ( arguments.length > 1 ) xhr.send( payload );
+        return xhr;
     }
-};
+;
 
 RT.UUID = function( PREFIX, SUFFIX ) {
     return (PREFIX||'') + (++UUID) + '_' + (Date.now()) + '_' + Math.floor((1000*Math.random())) + (SUFFIX||'');
diff --git a/src/RT.min..js b/src/RT.min..js
index 9e5bcbc..9674aad 100644
--- a/src/RT.min..js
+++ b/src/RT.min..js
@@ -6,4 +6,4 @@
 *  https://github.com/foo123/RT
 *
 **/
-!function(e,t,n){"use strict";"object"==typeof exports?module.exports=n():(e[t]=n())&&"function"==typeof define&&define.amd&&define(function(){return e[t]})}(this,"RT",function(){"use strict";function e(t){t=t||{};var r=(t.use||t.rt_type||"default").toLowerCase();return e.Client.Impl[n](r)?new e.Client.Impl[r](t):new e.Client(t)}var t="prototype",n="hasOwnProperty",r=Object.keys,o=Object[t].toString,i="undefined"!=typeof global&&"[object global]"===o.call(global),a=String.fromCharCode,s=/^\s+|\s+$/g,u=String[t].trim?function(e){return e.trim()}:function(e){return e.replace(s,"")},l=/[^A-Za-z0-9\+\/\=]/g,c=/\x0d\x0a/g,d=i?null:window.XMLHttpRequest?function(){return new XMLHttpRequest}:function(){return new ActiveXObject("Microsoft.XMLHTTP")},f=0;return e.VERSION="1.0.0",e.Platform={Node:i},e.XHR={create:function(t,r){if(t=t||{},i){if(!t.url)return null;var a="[object Object]"===o.call(t.url)?t.url:require("url").parse(t.url),s={method:t.method||"GET",agent:!1,protocol:a.protocol,host:a.hostname,hostname:a.hostname,port:a.port||80,path:(a.pathname||"/")+(a.query?"?"+a.query:"")},u="https:"===s.protocol?require("https").request:require("http").request,l={readyState:0,status:null,statusText:null,responseType:t.responseType||"text",responseURL:null,response:null,responseText:null,responseXml:null,headers:null,__headers__:null,send:function(e){null!=e&&(e=String(e),c.setHeader("Content-Length",e.length.toString()),c.write(e)),c.end()},abort:function(){c.abort()},getAllResponseHeaders:function(){return l.headers},getResponseHeader:function(e){if(null==e||4!==l.readyState)return null;var t=l.__headers__||{};return t[n](e)?t[e]:null},responseHeader:function(e){return l.getResponseHeader(e)},responseHeaders:function(e){return 4!==l.readyState?null:!0===e?l.__headers__:l.headers}},c=u(s,function(e){var n="",r=0;l.readyState=1,t.onStateChange&&t.onStateChange(l),l.headers=e.rawHeaders.join("\r\n"),l.__headers__=e.headers,l.responseURL=e.url||null,l.readyState=2,l.status=e.statusCode||null,l.statusText=e.statusMessage||null,t.onStateChange&&t.onStateChange(l),e.on("data",function(e){n+=e.toString(),r||(r=1,l.readyState=3,t.onStateChange&&t.onStateChange(l),t.onLoadStart&&t.onLoadStart(l)),t.onProgress&&t.onProgress(l)}),e.on("end",function(){l.readyState=4,l.responseType="text",l.response=l.responseText=n,t.onStateChange&&t.onStateChange(l),t.onLoadEnd&&t.onLoadEnd(l),4===l.readyState&&(200===l.status?t.onComplete&&t.onComplete(l):t.onRequestError?t.onRequestError(l):t.onError&&t.onError(l))}),e.on("error",function(e){l.statusText=e.toString(),t.onError&&t.onError(l)})});return c.setTimeout(t.timeout||3e4,function(e){t.onTimeout&&t.onTimeout(l)}),c.on("abort",function(e){t.onAbort&&t.onAbort(l)}),c.on("error",function(e){l.statusText=e.toString(),t.onError&&t.onError(l)}),t.headers&&e.Util.Header.encode(t.headers,null,c),c.setHeader("Connection","Keep-Alive"),arguments.length>1&&l.send(r),l}var l=d(),f=!0;return l._abort=l.abort,l._aborted=!1,l.abort=function(e){if(!l._aborted){!1===e&&(f=!1);try{l._abort()}catch(t){}l._aborted=!0,f=!0}},l.__headers__=null,l.responseHeader=function(e){return null==e||4!==l.readyState?null:l.getResponseHeader(e)},l.responseHeaders=function(t){if(4!==l.readyState)return null;var n=l.getAllResponseHeaders()||"";return null==l.__headers__&&(l.__headers__=e.Util.Header.decode(n)),!0===t?l.__headers__:n},t.url?(l.open(t.method||"GET",t.url,!t.sync),l.responseType=t.responseType||"text",t.headers&&e.Util.Header.encode(t.headers,l),t.mimeType&&l.overrideMimeType(t.mimeType),l.timeout=t.timeout||3e4,t.onProgress&&(l.onprogress=function(){t.onProgress(l)}),t.onLoadStart&&(l.onloadstart=function(){t.onLoadStart(l)}),t.onLoadEnd&&(l.onloadend=function(){t.onLoadEnd(l)}),!t.sync&&t.onStateChange&&(l.onreadystatechange=function(){t.onStateChange(l)}),l.onload=function(){4===l.readyState&&(200===l.status?t.onComplete&&t.onComplete(l):t.onRequestError?t.onRequestError(l):t.onError&&t.onError(l))},l.onabort=function(){f&&t.onAbort&&t.onAbort(l)},l.onerror=function(){t.onError&&t.onError(l)},l.ontimeout=function(){t.onTimeout&&t.onTimeout(l)},arguments.length>1&&l.send(r),l):l}},e.UUID=function(e,t){return(e||"")+ ++f+"_"+Date.now()+"_"+Math.floor(1e3*Math.random())+(t||"")},e.Const={BASE64:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",CRLF:"\r\n",CRLF_RE:/(\r\n)|\r|\n/g,COOKIE_RE:/([^=]+)(?:=(.*))?/},e.Util={String:{trim:u},Utf8:{encode:function(e){e=e.replace(c,"\n");var t,n,r,o="";for(t=0,n=e.length;n>t;t++)r=e.charCodeAt(t),o+=128>r?a(r):r>127&&2048>r?a(r>>6|192)+a(63&r|128):a(r>>12|224)+a(r>>6&63|128)+a(63&r|128);return o},decode:function(e){for(var t="",n=0,r=c1=c2=0,o=e.length;o>n;)r=e.charCodeAt(n),128>r?(t+=a(r),n++):r>191&&224>r?(c2=e.charCodeAt(n+1),t+=a((31&r)<<6|63&c2),n+=2):(c2=e.charCodeAt(n+1),c3=e.charCodeAt(n+2),t+=a((15&r)<<12|(63&c2)<<6|63&c3),n+=3);return t}},Base64:{encode:function(t){t=e.Util.Utf8.encode(t);for(var 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