Plugin extensions

The following is an example on how to create a custom File Upload widget that adjusts the deletion URL to include a request authenticity token to protect against CSRF attacks by overriding the destroy callback. It is a simplified version of the plugin extension that is used for the demo (see Demo Implementation). $.widget('blueimpUIX.fileupload', $.blueimpUI.fileupload, {

options: {
    authenticityTokenName: 'request_authenticity_token',
    destroy: function (e, data) {
        var fu = $(this).data('fileupload');
        data.url = data.url &&
            fu._addUrlParams(data.url, fu._getAuthenticityToken());
        $.blueimpUI.fileupload.prototype
            .options.destroy.call(this, e, data);
    }
},

_addUrlParams: function (url, data) {
    return url + (/\?/.test(url) ? '&' : '?') + $.param(data);
},

_getAuthenticityToken: function () {
    var name = this.options.authenticityTokenName,
        parts = $.cookie(name).split('|'),
        obj = {};
    obj[name] = parts[0];
    return obj;
}

}); Example on how to override existing plugin methods

See Template Engine.