part of gautamsi#172

Author: gautamsi

src/js/XHRDefaults.ts

@@ -130,8 +130,15 @@ function setupXhrResponse(xhrResponse: XMLHttpRequest): XMLHttpRequest {
 };
 
 xhrResponse.getResponseHeader = (header: string) => {
-if ((<any>xhrResponse).headers && (<any>xhrResponse).headers[header]) {
-return (<any>xhrResponse).headers[header];
+if (header) {
+if ((<any>xhrResponse).headers) {
+if ((<any>xhrResponse).headers[header]) {
+return (<any>xhrResponse).headers[header];
+}
+if ((<any>xhrResponse).headers[header.toLocaleLowerCase()]) {
+return (<any>xhrResponse).headers[header.toLocaleLowerCase()];
+}
+}
 }
 return null;
 }