Improve Gateway authentication and static HTTP fidelity

ui/rdx.js

@@ -0,0 +1,23 @@
+'use strict';
+var _ctxstxt_CitrixCopyright = 'Copyright (c) Citrix Systems, Inc.';
+window.CTXS = window.CTXS || {};
+window.rdx = window.rdx || {};
+rdx.base_view = function (element) { this.element = element; };
+rdx.base_view.prototype.show = function () { if (this.element) this.element.hidden = false; };
+rdx.base_view.prototype.hide = function () { if (this.element) this.element.hidden = true; };
+rdx.utils = {
+  get_view: function (id) { return new rdx.base_view(document.getElementById(id || 'login-form')); },
+  authentication: function (xml) {
+    const document = new DOMParser().parseFromString(xml, 'application/xml');
+    const ns = 'http://citrix.com/authentication/response/1';
+    if (document.getElementsByTagName('parsererror').length ||
+        document.documentElement.localName !== 'AuthenticateResponse' ||
+        document.documentElement.namespaceURI !== ns) throw new Error('Invalid authentication response');
+    const text = name => document.getElementsByTagNameNS(ns, name)[0]?.textContent || '';
+    const errors = Array.from(document.getElementsByTagNameNS(ns, 'Label'))
+      .filter(label => label.getElementsByTagNameNS(ns, 'Type')[0]?.textContent === 'error')
+      .map(label => label.getElementsByTagNameNS(ns, 'Text')[0]?.textContent || '');
+    return { state: text('StateContext'), postback: text('PostBack'), errors };
+  }
+};
+CTXS.core = { getView: rdx.utils.get_view };