XMLHttpRequest

// Made from scratch based on https://github.com/ShiftSpace/gmrequest/blob/master/GMRequest.js

XMLHttpRequest = function () {
    var _params = {
        context : this,
        headers : {},
        onreadystatechange  : function (detail) {
            this.status = detail.status;
            this.statusText = detail.statusText;
            this.responseHeaders = detail.responseHeaders;
            this.responseText = detail.responseText;
            this.readyState = detail.readyState;

            this.onreadystatechange && this.onreadystatechange();
        }.bind(this),
    },
    _exec,
    _send = function (data, binary) {
        var t = {
            data    : data,
            binary  : binary,
        };
        for (var key in _params) {
            t[key] = _params[key];
        }
        for (var key in this) {
            if (!(key in t)) {
                if (this[key] instanceof Function) {
                    t[key] = function (xhr) {
                        this[key].call(this, xhr);
                    }.bind(this);
                } else {
                    t[key] = this[key];
                }
            }
        }

        _exec = GM_xmlhttpRequest(t);
    }.bind(this);

    this.setRequestHeader = function (key, value) {
        _params.headers[key] = value;
    };

    this.getResponseHeader = function (key) {
        return this.responseHeaders[key];
    };

    this.getAllResponseHeaders = function () {
        return this.responseHeaders;
    };

    this.overrideMimeType = function (value) {
        _params.overrideMimeType = value;
    };

    this.open = function (_method, _url, _async, _user, _passw) {
        this.abort();

        _params.method = _method.toUpperCase();
        _params.url = _url;
        _params.synchronous = !_async;
        _params.user = _user;
        _params.password = _passw;
    };

    this.abort = function () {
        _exec && _exec.abort();
    }

    this.send = function (data) {
        _send(data, false);
    };

    this.sendAsBinary = function (data) {
        _send(data, true);
    }
};