+1

lib/src/virtual_directory.dart

@@ -263,8 +263,8 @@ class VirtualDirectory implements AngelPlugin {
     var value = req.headers.value(HttpHeaders.ACCEPT);
     bool acceptable = value == null ||
         value.isEmpty ||
-        value.contains(mimeType) ||
-        value.contains('*/*');
+        value?.contains(mimeType) == true ||
+        value?.contains('*/*') == true;
     if (!acceptable)
       throw new AngelHttpException(
           new UnsupportedError(

pubspec.yaml

@@ -4,7 +4,7 @@ environment:
   sdk: ">=1.19.0"
 homepage: https://github.com/angel-dart/static
 author: Tobe O <thosakwe@gmail.com>
-version: 1.2.2
+version: 1.2.2+1
 dependencies:
   angel_framework: ^1.0.0-dev
   cli_util: ^0.1.1