Allow to disable redirect url re-quoting #1474

CHANGES.rst

@@ -11,6 +11,8 @@ Changes
 
 - Added `history` to `ClientResponseError`. #1741
 
+- Allow to disable redirect url re-quoting #1474
+
 - Dropped "%O" in access logger #1673
 
 

aiohttp/client.py

@@ -43,6 +43,8 @@ class ClientSession:
     _source_traceback = None
     _connector = None
 
+    requote_redirect_url = True
+
     def __init__(self, *, connector=None, loop=None, cookies=None,
                  headers=None, skip_auto_headers=None,
                  auth=None, json_serialize=json.dumps,
@@ -272,7 +274,8 @@ def _request(self, method, url, *,
                                 "a redirect [{0.status}] status "
                                 "but response lacks a Location "
                                 "or URI HTTP header".format(resp))
-                        r_url = URL(r_url)
+                        r_url = URL(
+                            r_url, encoded=not self.requote_redirect_url)
 
                         scheme = r_url.scheme
                         if scheme not in ('http', 'https', ''):

docs/client_reference.rst

@@ -143,6 +143,14 @@ The client session supports the context manager protocol for self closing.
 
       .. versionadded:: 1.0
 
+   .. attribute:: requote_redirect_url
+
+      aiohttp re quote's redirect urls by default, but some servers
+      require exact url from location header. to disable `re-quote` system
+      set `requote_redirect_url` to `False`.
+
+      .. note:: this parameter affects all subsequent requests.
+
    .. attribute:: loop
 
       A loop instance used for session creation.