From e06cfa4de0c01a29f2a7d3a6596f9d74a6f459df Mon Sep 17 00:00:00 2001
From: Guillaume Ayoub <guillaume.ayoub@kozea.fr>
Date: Fri, 31 Aug 2012 17:21:16 +0200
Subject: [PATCH] Handle "If-None-Match: *" HTTP headers for PUT requests

---
 radicale/__init__.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/radicale/__init__.py b/radicale/__init__.py
index 060f04fd..3bda1a6b 100644
--- a/radicale/__init__.py
+++ b/radicale/__init__.py
@@ -474,8 +474,9 @@ class Application(object):
 
         # Evolution bug workaround
         etag = environ.get("HTTP_IF_MATCH", "").replace("\\", "")
+        match = environ.get("HTTP_IF_NONE_MATCH", "") == "*"
         if (not item and not etag) or (
-                item and ((etag or item.etag) == item.etag)):
+                item and ((etag or item.etag) == item.etag) and not match):
             # PUT allowed in 3 cases
             # Case 1: No item and no ETag precondition: Add new item
             # Case 2: Item and ETag precondition verified: Modify item