MAGETWO-43201: Require JS loading via CDN fails

- Proper support of IE9

Author: guz-anton

lib/web/mage/requirejs/text.js

@@ -36,16 +36,41 @@ define(['module'], function (module) {
         return external;
     }
 
+    /**
+     * Checks that url match current location
+     *
+     * @param {String} url
+     * @returns {Boolean}
+     */
+    function sameDomain(url) {
+        var uProtocol, uHostName, uPort,
+            xdRegExp = /^([\w:]+)?\/\/([^\/\\]+)/i,
+            location = window.location,
+            match = xdRegExp.exec(url);
+
+        if (!match) {
+            return true;
+        }
+        uProtocol = match[1];
+        uHostName = match[2];
+
+        uHostName = uHostName.split(':');
+        uPort = uHostName[1] || '';
+        uHostName = uHostName[0];
+
+        return (!uProtocol || uProtocol === location.protocol) &&
+            (!uHostName || uHostName.toLowerCase() === location.hostname.toLowerCase()) &&
+            ((!uPort && !uHostName) || uPort === location.port);
+    }
+
     /**
      * @returns {XMLHttpRequest|XDomainRequest|null}
      */
-    function createRequest() {
-        var xhr = null;
+    function createRequest(url) {
+        var xhr = new XMLHttpRequest();
 
-        if (typeof XDomainRequest !== 'undefined') {
+        if (!sameDomain(url) && typeof XDomainRequest !== 'undefined') {
             xhr = new XDomainRequest();
-        } else if (typeof XMLHttpRequest !== 'undefined') {
-            xhr = new XMLHttpRequest();
         }
 
         return xhr;
@@ -60,56 +85,46 @@ define(['module'], function (module) {
      * @param {Object} headers
      */
     function getContent(url, callback, fail, headers) {
-        var xhr = createRequest(),
+        var xhr = createRequest(url),
             header,
             errorHandler = fail || Function();
 
-        xhr.open('GET', url, true);
-
-        //Allow plugins direct access to xhr headers
-        for (header in headers) {
-            if (headers.hasOwnProperty(header)) {
-                xhr.setRequestHeader(header.toLowerCase(), headers[header]);
+        if ('setRequestHeader' in xhr && headers) {
+            for (header in headers) {
+                if (headers.hasOwnProperty(header)) {
+                    xhr.setRequestHeader(header.toLowerCase(), headers[header]);
+                }
             }
         }
 
-        //Allow overrides specified in config
         if (defaultConfig.onXhr) {
             defaultConfig.onXhr(xhr, url);
         }
 
         /**
          * onload handler
          */
-        xhr.onreadystatechange = function () {
-            var status = xhr.status || 0,
-                error;
-
-            if (xhr.readyState !== 4) {
-                return;
-            }
-
-            if (status > 399 && status < 600) {
-                //An http 4xx or 5xx error. Signal an error.
-                error = new Error(url + ' HTTP status: ' + status);
-                error.xhr = xhr;
-
-                errorHandler(error);
-
-                if (defaultConfig.onXhrFailure) {
-                    defaultConfig.onXhrFailure(xhr, url);
-                }
-
-                return;
-            }
+        xhr.onload = function () {
 
             callback(xhr.responseText);
 
             if (defaultConfig.onXhrComplete) {
                 defaultConfig.onXhrComplete(xhr, url);
             }
         };
-        xhr.send(null);
+        /**
+         * onerror handler
+         */
+        xhr.onerror = function (event) {
+            errorHandler(event);
+
+            if (defaultConfig.onXhrFailure) {
+                defaultConfig.onXhrFailure(xhr, url, event);
+            }
+        };
+
+        xhr.open('GET', url);
+        xhr.send();
     }
 
     /**