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Super Light AJAX plugin

Super Light AJAX plugin by IvanSkvortsov

目前为 2017-08-04 提交的版本，查看 最新版本。

此脚本不应直接安装，它是供其他脚本使用的外部库。如果你需要使用该库，请在脚本元属性加入：// @require https://update.cn-greasyfork.org/scripts/32009/209784/Super%20Light%20AJAX%20plugin.js 

  1. // ==UserScript==
  2. // @name           Super Light AJAX plugin
  3. // @description    Super Light AJAX plugin by IvanSkvortsov
  4. // @description:ru Супер упрощенная версия AJAX плагина от IvanSkvortsov
  5. // @include        *://*
  6. // @author         IvanSkvortsov
  7. // @date           2017.08.04
  8. // @version        1.0.1
  9. // @grant          none
  10. // ==/UserScript==
  11. (function(){
  12. 	var lqueue = [], lrequestInProgress = false, lqueueCleaned = true;
  13. 	function XHttpRequestLight(){
  14. 		var request = lqueue[0], xhttp = null, i, key,
  15. 			activeXs = ['Msxml3.XMLHTTP', 'Msxml2.XMLHTTP.6.0', 'Msxml2.XMLHTTP.3.0', 'Msxml2.XMLHTTP', 'Microsoft.XMLHTTP',];
  16. 		if(!( request && (lrequestInProgress === 'false' || request.async === 'false') && lqueue.length > 0 ))
  17. 			return;
  18. 		// handle request:
  19. 		request.method = request.method || 'GET';
  20. 		if( request.method.toUpperCase() === 'GET' && request.data ){
  21. 			request.url += '?' + request.data;
  22. 			request.data = null;
  23. 		}
  24. 		request.async = typeof request.async === 'boolean' ? request.async : true;
  25. 		// createXmlHttpRequest:
  26. 		if( window.XMLHttpRequest )
  27. 			xhttp = new XMLHttpRequest();
  28. 		else if( window.ActiveXObject ){
  29. 			for( i = 0; i < activeXs.length; ++i ){
  30. 				try{xhttp = new ActiveXObject(activeXs[i]);}
  31. 				catch(error){continue;}
  32. 				break;
  33. 			}
  34. 			if( !xhttp ){
  35. 				console.error("[XHttpRequestLight] can't create ActiveXObject");
  36. 				return;
  37. 			}
  38. 		}else{
  39. 			console.error("[XHttpRequestLight] can't create XmlHttpRequest object");
  40. 			return;
  41. 		}
  42. 		xhttp.open( request.method, request.url, request.async );
  43. 		lrequestInProgress = true;
  44. 		lqueue.shift();
  45. 		for( key in request.headers )
  46. 			xhttp.setRequestHeader( key, request.headers[key] );
  47. 		xhttp.url = request.url;
  48. 		var events = ['onabort', 'onerror', 'onload', 'onloadend', 'onloadstart', 'onprogress', 'onreadystatechange', 'ontimeout',];
  49. 		// handle XmlHttpRequest events
  50. 		events.forEach(function(type){
  51. 			if( request[type] ){
  52. 				xhttp[type] = function(event){
  53. 					xhttp.lengthComputable = event.lengthComputable || false;
  54. 					xhttp.loaded = event.loaded || 0;
  55. 					xhttp.total = event.total || 0;
  56. 					request[type].call(xhttp, xhttp.responseText);
  57. 					if( type === 'onerror' || type === 'onload' || (type === 'onreadystatechange' && xhttp.readyState == 4 && xhttp.status == 200 && !request.onload)){
  58. 						lrequestInProgress = false;
  59. 						request.delay = request.delay > 20 ? request.delay : 20;
  60. 						setTimeout( XHttpRequestLight, request.delay );
  61. 					}
  62. 				};
  63. 			}
  64. 		});
  65. 	}
  66. 	window.ISL = window.ISL || {};
  67. 	// AJAX API
  68. 	ISL.lajaxAddXHR = function(){
  69. 		var request;
  70. 		switch(arguments.length){
  71. 			case 0:
  72. 				return;
  73. 			case 1:
  74. 				request = arguments[0];
  75. 				if( request.length )
  76. 					request.forEach( function(req){ lqueue.push(req);} );
  77. 				else
  78. 					lqueue.push(request);
  79. 				break;
  80. 			default:
  81. 				console.error("[lajaxAddXHR] invalid number of arguments: " + arguments.length);
  82. 				return;
  83. 		}
  84. 		lqueueCleaned = false;
  85. 	};
  86. 	ISL.lajax = function(){
  87. 		this.lajaxAddXHR(arguments);
  88. 		XHttpRequestLight();
  89. 	};
  90. 	ISL.lajaxClean = function(){
  91. 		lqueue.length = 0;
  92. 		lrequestInProgress = false;
  93. 		lqueueCleaned = true;
  94. 	};
  95. 	ISL.lajaxLength = function(){ return lqueue.length; };
  96. })();