Merge pull request #28 from belousovAV/fix-blank-payload

sha256 should be present for blank payload too

Author: radar

lib/aws_auth/authorization_header.ex

@@ -18,10 +18,7 @@ defmodule AWSAuth.AuthorizationHeader do
 
     headers = Map.put_new(headers, "host", uri.host)
 
-    payload = case payload do
-      "" -> ""
-      _ -> AWSAuth.Utils.hash_sha256(payload)
-    end
+    payload = AWSAuth.Utils.hash_sha256(payload)
 
     headers = Map.put_new(headers, "x-amz-content-sha256", payload)