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AjaxListener

AjaxListener, events: onOpen, onSend, onCallback

Version vom 02.09.2015. 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.greasyfork.org/scripts/12135/71713/AjaxListener.js 

var ajaxListener = new Object();
if (typeof XMLHttpRequest === "undefined") {
    XMLHttpRequest = function () {
        try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); }
        catch (e) { }
        try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); }
        catch (e) { }
        try { return new ActiveXObject("Microsoft.XMLHTTP"); }
        catch (e) { }
        throw new Error("This browser does not support XMLHttpRequest.");
    };
}
ajaxListener.open = XMLHttpRequest.prototype.open;
ajaxListener.send = XMLHttpRequest.prototype.send;

ajaxListener.onOpen = function (method, url, async, user, password) { };
ajaxListener.onSend = function (data, arg) { };
ajaxListener.onCallback = function () { };

XMLHttpRequest.prototype.open = function(method, url, async, user, password) {
    ajaxListener.xhr = this;
    ajaxListener.method = method;
    ajaxListener.url = url;
    ajaxListener.async = async;
    ajaxListener.user = user;
    ajaxListener.password = password;
    if (method.toLowerCase() == "get") {
        ajaxListener.data = user.split("?");
        ajaxListener.data = ajaxListener.data[1];
    }
    if (typeof ajaxListener.onOpen == "function") {
        ajaxListener.onOpen(method, url, async, user, password);
        for (var i = 0; i < arguments.length; i++) {
            switch (i) {
                case 0: arguments[i] = ajaxListener.method; break;
                case 1: arguments[i] = ajaxListener.url; break;
                case 2: arguments[i] = ajaxListener.async; break;
                case 3: arguments[i] = ajaxListener.user; break;
                case 4: arguments[i] = ajaxListener.password; break;
            }
        }
    }
    ajaxListener.open.apply(this, arguments);
};

XMLHttpRequest.prototype.send = function (data, arg) {
    if (ajaxListener.method.toLowerCase() == "post")
        ajaxListener.data = data;
    ajaxListener.arg = arg;
    if (typeof ajaxListener.onSend == "function") {
        ajaxListener.onSend(data, arg);
        for (var i = 0; i < arguments.length; i++) {
            switch (i) {
                case 0: arguments[i] = ajaxListener.data; break;
                case 1: arguments[i] = ajaxListener.arg; break;
            }
        }
    }

    ajaxListener.onreadystatechange = this.onreadystatechange;
    this.onreadystatechange = function () {
        ajaxListener.onreadystatechange.apply(this);
        if (this.readyState == 4
            && typeof ajaxListener.onCallback == "function")
            ajaxListener.onCallback();
    };

    ajaxListener.send.apply(this, arguments);
};