From a66c5811f8606fa0006258ceac61cc4ae2da0444 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20=C4=8Ciha=C5=99?= <michal@cihar.com>
Date: Sun, 24 Jul 2016 16:12:22 +0200
Subject: [PATCH] Support any encoding in HEAD requests
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Completely support would be more problematic and this already covers
most usual case.

Fixes #2775

Signed-off-by: Michal Čihař <michal@cihar.com>
---
 CHANGES                      | 1 +
 sphinx/builders/linkcheck.py | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/CHANGES b/CHANGES
index 0da0a09ef8..870cf85294 100644
--- a/CHANGES
+++ b/CHANGES
@@ -14,6 +14,7 @@ Bugs fixed
 
 * #2778: Fix autodoc crashes if obj.__dict__ is a property method and raises exception
 * Fix duplicated toc in epub3 output.
+* #2775: Fix failing linkcheck with servers not supporting identidy encoding
 
 Release 1.4.5 (released Jul 13, 2016)
 =====================================
diff --git a/sphinx/builders/linkcheck.py b/sphinx/builders/linkcheck.py
index 0533f1c506..0f1716aafd 100644
--- a/sphinx/builders/linkcheck.py
+++ b/sphinx/builders/linkcheck.py
@@ -56,6 +56,11 @@ opener.addheaders = [('User-agent', 'Mozilla/5.0 (X11; Linux x86_64; rv:25.0) '
 
 class HeadRequest(Request):
     """Subclass of urllib2.Request that sends a HEAD request."""
+    def __init__(self, *args, **kwargs):
+        Request.__init__(self, *args, **kwargs)
+        # we do not parse the response in HEAD, so accepting anything is okay
+        self.headers['Accept-encoding'] = '*'
+
     def get_method(self):
         return 'HEAD'