Retrieving lists of objects using aws-cli fails with error Incorrect Padding

I uploaded around 2000 files in one bucket to the swift using aws-cli, but when I try to list them I only get 1000 and after that the request fails.

<Error><Code>InternalError</Code><Message>We encountered an internal error. Please try again.</Message><RequestId>tx480c8bbeab164de4a1e42-005c904602</RequestId><Reason>Incorrect padding</Reason></Error>

The swift-proxy-server logs show:
Incorrect padding: #012Traceback (most recent call last):#012 File "/usr/lib/python2.7/dist-packages/swift3/middleware.py", line 80, in __call__#012 resp = self.handle_request(req)#012 File "/usr/lib/python2.7/dist-packages/swift3/middleware.py", line 107, in handle_request#012 res = handler(req)#012 File "/usr/lib/python2.7/dist-packages/swift3/controllers/bucket.py", line 131, in GET#012 decoded = b64decode(req.params['continuation-token'])#012 File "/usr/lib/python2.7/base64.py", line 96, in standard_b64decode#012 return b64decode(s)#012 File "/usr/lib/python2.7/base64.py", line 78, in b64decode#012 raise TypeError(msg)#012TypeError: Incorrect padding (txn: tx480c8bbeab164de4a1e42-005c904602) (client_ip: 172.30.240.205)

The issue is due to the fact that continuation-token calculated by swift3 is
MjAwMGNvdW50L2ZpbGUuMTg5OQ==

but the continuation-token received by the swift3 in the next request is
MjAwMGNvdW50L2ZpbGUuMTg5OQ%3D%3D

This is happening because continuation-token is sent as query param and "==" gets converted into 0x3d hex.

We need to replace %xx in the continuation-token by using unquote.