From 0ffa97eca0d051feb77ec9ccc6634d6b686df66f Mon Sep 17 00:00:00 2001
From: Unrud <unrud@openaliasbox.org>
Date: Fri, 2 Jun 2017 12:44:36 +0200
Subject: [PATCH] Allow opening binary files with _atomic_write

---
 radicale/storage.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/radicale/storage.py b/radicale/storage.py
index a256603..9225694 100644
--- a/radicale/storage.py
+++ b/radicale/storage.py
@@ -423,8 +423,8 @@ class Collection(BaseCollection):
     def _atomic_write(self, path, mode="w", newline=None):
         directory = os.path.dirname(path)
         tmp = NamedTemporaryFile(
-            mode=mode, dir=directory, encoding=self.encoding,
-            delete=False, prefix=".Radicale.tmp-", newline=newline)
+            mode=mode, dir=directory, delete=False, prefix=".Radicale.tmp-",
+            newline=newline, encoding=None if "b" in mode else self.encoding)
         try:
             yield tmp
             self._fsync(tmp.fileno())