From 9ff2e43cd6de340c152145adc0e922f94e0aaf1c Mon Sep 17 00:00:00 2001
From: Jesse Shapiro <jesse@jesseshapiro.net>
Date: Thu, 5 May 2016 06:27:12 -0400
Subject: [PATCH] Removing charset from JSON content type; tightening
 requirements on .encode()

---
 requests/models.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/requests/models.py b/requests/models.py
index 05ec3e47..2341c1b8 100644
--- a/requests/models.py
+++ b/requests/models.py
@@ -423,8 +423,10 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
             # When urllib3 uses pyOpenSSL, it can only resume large uploads
             # properly if receiving a bytes-like object. In Python 2, json.dumps()
             # returns just that, but Python 3 returns a Unicode string.
-            content_type = 'application/json; charset=utf-8'
-            body = complexjson.dumps(json).encode('utf-8')
+            content_type = 'application/json'
+            body = complexjson.dumps(json)
+            if not isinstance(body, bytes):
+                body = body.encode('utf-8')
 
         is_stream = all([
             hasattr(data, '__iter__'),