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AjaxListener

AjaxListener, events: onOpen, onSend, onCallback

此脚本不应直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.cn-greasyfork.org/scripts/12135/71713/AjaxListener.js 

  1. var ajaxListener = new Object();
  2. if (typeof XMLHttpRequest === "undefined") {
  3.     XMLHttpRequest = function () {
  4.         try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); }
  5.         catch (e) { }
  6.         try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); }
  7.         catch (e) { }
  8.         try { return new ActiveXObject("Microsoft.XMLHTTP"); }
  9.         catch (e) { }
  10.         throw new Error("This browser does not support XMLHttpRequest.");
  11.     };
  12. }
  13. ajaxListener.open = XMLHttpRequest.prototype.open;
  14. ajaxListener.send = XMLHttpRequest.prototype.send;
  15.  
  16. ajaxListener.onOpen = function (method, url, async, user, password) { };
  17. ajaxListener.onSend = function (data, arg) { };
  18. ajaxListener.onCallback = function () { };
  19.  
  20. XMLHttpRequest.prototype.open = function(method, url, async, user, password) {
  21.     ajaxListener.xhr = this;
  22.     ajaxListener.method = method;
  23.     ajaxListener.url = url;
  24.     ajaxListener.async = async;
  25.     ajaxListener.user = user;
  26.     ajaxListener.password = password;
  27.     if (method.toLowerCase() == "get") {
  28.         ajaxListener.data = user.split("?");
  29.         ajaxListener.data = ajaxListener.data[1];
  30.     }
  31.     if (typeof ajaxListener.onOpen == "function") {
  32.         ajaxListener.onOpen(method, url, async, user, password);
  33.         for (var i = 0; i < arguments.length; i++) {
  34.             switch (i) {
  35.                 case 0: arguments[i] = ajaxListener.method; break;
  36.                 case 1: arguments[i] = ajaxListener.url; break;
  37.                 case 2: arguments[i] = ajaxListener.async; break;
  38.                 case 3: arguments[i] = ajaxListener.user; break;
  39.                 case 4: arguments[i] = ajaxListener.password; break;
  40.             }
  41.         }
  42.     }
  43.     ajaxListener.open.apply(this, arguments);
  44. };
  45.  
  46. XMLHttpRequest.prototype.send = function (data, arg) {
  47.     if (ajaxListener.method.toLowerCase() == "post")
  48.         ajaxListener.data = data;
  49.     ajaxListener.arg = arg;
  50.     if (typeof ajaxListener.onSend == "function") {
  51.         ajaxListener.onSend(data, arg);
  52.         for (var i = 0; i < arguments.length; i++) {
  53.             switch (i) {
  54.                 case 0: arguments[i] = ajaxListener.data; break;
  55.                 case 1: arguments[i] = ajaxListener.arg; break;
  56.             }
  57.         }
  58.     }
  59.  
  60.     ajaxListener.onreadystatechange = this.onreadystatechange;
  61.     this.onreadystatechange = function () {
  62.         ajaxListener.onreadystatechange.apply(this);
  63.         if (this.readyState == 4
  64.             && typeof ajaxListener.onCallback == "function")
  65.             ajaxListener.onCallback();
  66.     };
  67.  
  68.     ajaxListener.send.apply(this, arguments);
  69. };