check for both normalized and non normalized

Author: daltonpearson

lib/browser/FetchHttpStack.ts

@@ -42,7 +42,7 @@ class FetchRequest implements HttpRequest {
   }
 
   getHeader(header: string) {
-    return this._headers[header.toLowerCase()] || undefined
+    return this._headers[header] || this._headers[header.toLowerCase()] || undefined
   }
 
   setProgressHandler(_progressHandler: HttpProgressHandler): void {
@@ -93,7 +93,7 @@ class FetchResponse implements HttpResponse {
   }
 
   getHeader(header: string): string | undefined {
-    return this._res.headers.get(header.toLowerCase()) || undefined
+    return this._res.headers.get(header) || this._res.headers.get(header.toLowerCase()) || undefined
   }
 
   getBody(): string {

lib/browser/XHRHttpStack.ts

@@ -48,7 +48,7 @@ class XHRRequest implements HttpRequest {
   }
 
   getHeader(header: string): string {
-    return this._headers[header.toLowerCase()]
+    return this._headers[header] || this._headers[header.toLowerCase()]
   }
 
   setProgressHandler(progressHandler: HttpProgressHandler): void {
@@ -113,7 +113,7 @@ class XHRResponse implements HttpResponse {
   }
 
   getHeader(header: string): string | undefined {
-    return this._xhr.getResponseHeader(header.toLowerCase()) || undefined
+    return this._xhr.getResponseHeader(header) || this._xhr.getResponseHeader(header.toLowerCase()) || undefined
   }
 
   getBody(): string {

lib/node/NodeHttpStack.ts

@@ -62,7 +62,7 @@ class Request implements HttpRequest {
   }
 
   getHeader(header: string) {
-    return this._headers[header.toLowerCase()]
+    return this._headers[header] || this._headers[header.toLowerCase()]
   }
 
   setProgressHandler(progressHandler: HttpProgressHandler) {