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Super Light AJAX plugin

Super Light AJAX plugin by IvanSkvortsov

Version vom 04.08.2017. Aktuellste Version

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greatest.deepsurf.us/scripts/32009/209806/Super%20Light%20AJAX%20plugin.js 

// ==UserScript==
// @name           Super Light AJAX plugin
// @description    Super Light AJAX plugin by IvanSkvortsov
// @description:ru Супер упрощенная версия AJAX плагина от IvanSkvortsov
// @include        *://*
// @author         IvanSkvortsov
// @date           2017.08.04
// @version        1.0.2
// @grant          none
// ==/UserScript==
(function(){
	var lqueue = [], lrequestInProgress = false, lqueueCleaned = true;
	function XHttpRequestLight(){
		var request = lqueue[0], xhttp = null, i, key,
			activeXs = ['Msxml3.XMLHTTP', 'Msxml2.XMLHTTP.6.0', 'Msxml2.XMLHTTP.3.0', 'Msxml2.XMLHTTP', 'Microsoft.XMLHTTP',];
		if(!( request && (lrequestInProgress === false || request.async === true) && lqueue.length > 0 ))
			return;
		// handle request:
		request.method = request.method || 'GET';
		if( request.method.toUpperCase() === 'GET' && request.data ){
			request.url += '?' + request.data;
			request.data = null;
		}
		request.async = typeof request.async === 'boolean' ? request.async : true;
		// createXmlHttpRequest:
		if( window.XMLHttpRequest )
			xhttp = new XMLHttpRequest();
		else if( window.ActiveXObject ){
			for( i = 0; i < activeXs.length; ++i ){
				try{xhttp = new ActiveXObject(activeXs[i]);}
				catch(error){continue;}
				break;
			}
			if( !xhttp ){
				console.error("[XHttpRequestLight] can't create ActiveXObject");
				return;
			}
		}else{
			console.error("[XHttpRequestLight] can't create XmlHttpRequest object");
			return;
		}
		xhttp.open( request.method, request.url, request.async );
		lrequestInProgress = true;
		lqueue.shift();
		for( key in request.headers )
			xhttp.setRequestHeader( key, request.headers[key] );
		xhttp.url = request.url;
		var events = ['onabort', 'onerror', 'onload', 'onloadend', 'onloadstart', 'onprogress', 'onreadystatechange', 'ontimeout',];
		// handle XmlHttpRequest events
		events.forEach(function(type){
			if( request[type] ){
				xhttp[type] = function(event){
					xhttp.lengthComputable = event.lengthComputable || false;
					xhttp.loaded = event.loaded || 0;
					xhttp.total = event.total || 0;
					request[type].call(xhttp, xhttp.responseText);
					if( type === 'onerror' || type === 'onload' || (type === 'onreadystatechange' && xhttp.readyState == 4 && xhttp.status == 200 && !request.onload)){
						lrequestInProgress = false;
						request.delay = request.delay > 20 ? request.delay : 20;
						setTimeout( XHttpRequestLight, request.delay );
					}
				};
			}
		});
	}
	window.ISL = window.ISL || {};
	// AJAX API
	ISL.lajaxAddXHR = function(){
		var request;
		switch(arguments.length){
			case 0:
				return;
			case 1:
				request = arguments[0];
				if( request.length )
					request.forEach( function(req){ lqueue.push(req);} );
				else
					lqueue.push(request);
				break;
			default:
				console.error("[lajaxAddXHR] invalid number of arguments: " + arguments.length);
				return;
		}
		lqueueCleaned = false;
	};
	ISL.lajax = function(){
		this.lajaxAddXHR(arguments);
		XHttpRequestLight();
	};
	ISL.lajaxClean = function(){
		lqueue.length = 0;
		lrequestInProgress = false;
		lqueueCleaned = true;
	};
	ISL.lajaxLength = function(){ return lqueue.length; };
})();