fix stream handling

sanic/exceptions.py

@@ -177,8 +177,6 @@ class URLBuildError(ServerError):
 
 
 class FileNotFound(NotFound):
-    pass
-
     def __init__(self, message, path, relative_url):
         super().__init__(message)
         self.path = path
@@ -208,8 +206,6 @@ class HeaderNotFound(InvalidUsage):
 
 @add_status_code(416)
 class ContentRangeError(SanicException):
-    pass
-
     def __init__(self, message, content_range):
         super().__init__(message)
         self.headers = {

sanic/router.py

@@ -419,7 +419,7 @@ class Router:
         """
         try:
             handler = self.get(request)[0]
-        except (NotFound, InvalidUsage):
+        except (NotFound, MethodNotSupported):
             return False
         if (hasattr(handler, 'view_class') and
                 hasattr(handler.view_class, request.method.lower())):