[Python-checkins] bpo-30904: Removed duplicated Host: header. (#4465)

[Vinay Sajip]

https://github.com/python/cpython/commit/e96ba183c43ad6633b5d014b3dc57433e2802faf
commit: e96ba183c43ad6633b5d014b3dc57433e2802faf
branch: master
author: Vinay Sajip <vinay_sajip at yahoo.co.uk>
committer: GitHub <noreply at github.com>
date: 2017-11-19T18:36:17Z
summary:

bpo-30904: Removed duplicated Host: header. (#4465)

files:
M Lib/logging/handlers.py

diff --git a/Lib/logging/handlers.py b/Lib/logging/handlers.py
index d1871acfa4b..974c089d40e 100644
--- a/Lib/logging/handlers.py
+++ b/Lib/logging/handlers.py
@@ -1180,7 +1180,9 @@ def emit(self, record):
             i = host.find(":")
             if i >= 0:
                 host = host[:i]
-            h.putheader("Host", host)
+            # See issue #30904: putrequest call above already adds this header
+            # on Python 3.x.
+            # h.putheader("Host", host)
             if self.method == "POST":
                 h.putheader("Content-type",
                             "application/x-www-form-urlencoded")