Update library: requests

libs/requests/packages/urllib3/util/request.py

@@ -1,13 +1,12 @@
 from base64 import b64encode
 
-from ..packages import six
-
+from ..packages.six import b
 
 ACCEPT_ENCODING = 'gzip,deflate'
 
 
 def make_headers(keep_alive=None, accept_encoding=None, user_agent=None,
-                 basic_auth=None, proxy_basic_auth=None):
+                 basic_auth=None, proxy_basic_auth=None, disable_cache=None):
     """
     Shortcuts for generating request headers.
 
@@ -32,7 +31,10 @@ def make_headers(keep_alive=None, accept_encoding=None, user_agent=None,
         Colon-separated username:password string for 'proxy-authorization: basic ...'
         auth header.
 
-    Example: ::
+    :param disable_cache:
+        If ``True``, adds 'cache-control: no-cache' header.
+
+    Example::
 
         >>> make_headers(keep_alive=True, user_agent="Batman/1.0")
         {'connection': 'keep-alive', 'user-agent': 'Batman/1.0'}
@@ -57,12 +59,13 @@ def make_headers(keep_alive=None, accept_encoding=None, user_agent=None,
 
     if basic_auth:
         headers['authorization'] = 'Basic ' + \
-            b64encode(six.b(basic_auth)).decode('utf-8')
+            b64encode(b(basic_auth)).decode('utf-8')
 
     if proxy_basic_auth:
         headers['proxy-authorization'] = 'Basic ' + \
-            b64encode(six.b(proxy_basic_auth)).decode('utf-8')
+            b64encode(b(proxy_basic_auth)).decode('utf-8')
+
+    if disable_cache:
+        headers['cache-control'] = 'no-cache'
 
     return headers
-
-