From 770936f1f9b56010011c2af7f5f854d88f1c1d4f Mon Sep 17 00:00:00 2001
From: Maximilian Hils <git@maximilianhils.com>
Date: Wed, 21 Sep 2016 19:21:32 -0700
Subject: raise TypeError on invalid header assignment, fix #1562

---
 netlib/http/headers.py | 1 +
 1 file changed, 1 insertion(+)

(limited to 'netlib/http/headers.py')

diff --git a/netlib/http/headers.py b/netlib/http/headers.py
index 131e8ce5..b55874ca 100644
--- a/netlib/http/headers.py
+++ b/netlib/http/headers.py
@@ -14,6 +14,7 @@ if six.PY2:  # pragma: no cover
         return x
 
     def _always_bytes(x):
+        strutils.always_bytes(x, "utf-8", "replace")  # raises a TypeError if x != str/bytes/None.
         return x
 else:
     # While headers _should_ be ASCII, it's not uncommon for certain headers to be utf-8 encoded.
-- 
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