remove six transitional dependency

.coveragerc

@@ -15,4 +15,3 @@ exclude_lines =
     def __str__
     raise AssertionError
     raise NotImplementedError
-    if six.PY3:

README.rst

@@ -33,7 +33,6 @@ Dependencies
 * requests >= 2.4
 * requests_futures >= 0.9.5
 * lxml >= 3.4
-* six >= 1.8
 
 Minimal version of package dependencies are just indicative and means that ``django-cas-server`` has
 been tested with it. Previous versions of dependencies may or may not work.
@@ -51,7 +50,6 @@ them on debian like systems and centos like systems.
 You should try as much as possible to use system packages as they are automatically updated when
 you update your system. You can then install Not Available (N/A)
 packages on your system using pip3 inside a virtualenv as described in the `Installation`_ section.
-For use with python2, just replace python3(6) in the table by python.
 
 +------------------+--------------------------+---------------------+
 | python package   | debian like systems      | centos like systems |
@@ -64,8 +62,6 @@ For use with python2, just replace python3(6) in the table by python.
 +------------------+--------------------------+---------------------+
 | lxml             | python3-lxml             | python36-lxml       |
 +------------------+--------------------------+---------------------+
-| six              | python3-six              | python36-six        |
-+------------------+--------------------------+---------------------+
 | ldap3            | python3-ldap3            | python36-ldap3      |
 +------------------+--------------------------+---------------------+
 | psycopg2         | python3-psycopg2         | python36-psycopg2   |
@@ -84,14 +80,14 @@ The recommended installation mode is to use a virtualenv with ``--system-site-pa
 
    On debian like systems::
 
-    $ sudo apt-get install python3-django python3-requests python3-six python3-lxml python3-requests-futures
+    $ sudo apt-get install python3-django python3-requests python3-lxml python3-requests-futures
 
    On debian jessie, you can use the version of python-django available in the
    `backports <https://backports.debian.org/Instructions/>`_.
 
    On centos like systems with epel enabled::
 
-    $ sudo yum install python36-django python36-requests python36-six python36-lxml
+    $ sudo yum install python36-django python36-requests python36-lxml
 
 3. Create a virtualenv::
 

cas_server/auth.py

@@ -17,7 +17,6 @@ from django.db import connections, DatabaseError
 
 import warnings
 from datetime import timedelta
-from six.moves import range
 try:  # pragma: no cover
     import MySQLdb
     import MySQLdb.cursors

cas_server/cas.py

@@ -22,10 +22,9 @@
 # at commit ec1f2d4779625229398547b9234d0e9e874a2c9a
 # some modifications have been made to be unicode coherent between python2 and python2
 
-import six
+import urllib.parse as urllib_parse
-from six.moves.urllib import parse as urllib_parse
+import urllib.request as urllib_request
-from six.moves.urllib import request as urllib_request
+from urllib.request import Request
-from six.moves.urllib.request import Request
 from uuid import uuid4
 import datetime
 
@@ -37,7 +36,7 @@ class CASError(ValueError):
 class ReturnUnicode(object):
     @staticmethod
     def u(string, charset):
-        if not isinstance(string, six.text_type):
+        if not isinstance(string, str):
             return string.decode(charset)
         else:
             return string

cas_server/federate.py

@@ -17,7 +17,7 @@ from .cas import CASClient
 from .models import FederatedUser, FederateSLO, User
 
 import logging
-from six.moves import urllib
+import urllib
 
 #: logger facility
 logger = logging.getLogger(__name__)

cas_server/tests/test_federate.py

@@ -10,6 +10,8 @@
 #
 # (c) 2016 Valentin Samir
 """tests for the CAS federate mode"""
+import importlib
+
 from cas_server import default_settings
 from cas_server.default_settings import settings
 
@@ -17,8 +19,6 @@ import django
 from django.test import TestCase, Client
 from django.test.utils import override_settings
 
-from six.moves import reload_module
-
 from cas_server import utils, models
 from cas_server.tests.mixin import BaseServicePattern, CanLogin, FederatedIendityProviderModel
 from cas_server.tests import utils as tests_utils
@@ -49,7 +49,7 @@ class FederateAuthLoginLogoutTestCase(
     def test_default_settings(self):
         """default settings should populated some default variable then CAS_FEDERATE is True"""
         del settings.CAS_AUTH_CLASS
-        reload_module(default_settings)
+        importlib.reload(default_settings)
         self.assertEqual(settings.CAS_AUTH_CLASS, "cas_server.auth.CASFederateAuth")
 
     def test_login_get_provider(self):

cas_server/tests/test_utils.py

@@ -14,7 +14,6 @@ import django
 from django.test import TestCase, RequestFactory
 from django.db import connection
 
-import six
 import warnings
 import datetime
 
@@ -66,15 +65,12 @@ class CheckPasswordCase(TestCase):
         salts = ["$6$UVVAQvrMyXMF3FF3", "aa"]
         hashed_password1 = []
         for salt in salts:
-            if six.PY3:
             hashed_password1.append(
                 utils.crypt.crypt(
                     self.password1.decode("utf8"),
                     salt
                 ).encode("utf8")
             )
-            else:
-                hashed_password1.append(utils.crypt.crypt(self.password1, salt))
 
         for hp1 in hashed_password1:
             self.assertTrue(utils.check_password("crypt", self.password1, hp1, "utf8"))
@@ -240,7 +236,7 @@ class UtilsTestCase(TestCase):
             )
         else:
             version = utils.last_version()
-            self.assertIsInstance(version, six.text_type)
+            self.assertIsInstance(version, str)
             self.assertEqual(len(version.split('.')), 3)
 
             # version is cached 24h so calling it a second time should return the save value

cas_server/tests/test_view.py

@@ -22,7 +22,6 @@ import random
 import json
 import mock
 from lxml import etree
-from six.moves import range
 
 from cas_server import models
 from cas_server import utils

cas_server/tests/utils.py

@@ -18,11 +18,10 @@ from django.template import loader
 from django.utils import timezone
 
 import cgi
-import six
 from threading import Thread
 from lxml import etree
-from six.moves import BaseHTTPServer
+import http.server as BaseHTTPServer
-from six.moves.urllib.parse import urlparse, parse_qsl, parse_qs
+from urllib.parse import urlparse, parse_qsl, parse_qs
 from datetime import timedelta
 
 from cas_server import models
@@ -43,7 +42,7 @@ else:
 
 def return_unicode(string, charset):
     """make `string` a unicode if `string` is a unicode or bytes encoded with `charset`"""
-    if not isinstance(string, six.text_type):
+    if not isinstance(string, str):
         return string.decode(charset)
     else:
         return string
@@ -54,7 +53,7 @@ def return_bytes(string, charset):
         make `string` a bytes encoded with `charset` if `string` is a unicode
         or bytes encoded with `charset`
     """
-    if isinstance(string, six.text_type):
+    if isinstance(string, str):
         return string.encode(charset)
     else:
         return string

cas_server/utils.py

@@ -32,7 +32,6 @@ import json
 import hashlib
 import crypt
 import base64
-import six
 import requests
 import time
 import logging
@@ -40,7 +39,7 @@ import binascii
 
 from importlib import import_module
 from datetime import datetime, timedelta
-from six.moves.urllib.parse import urlparse, urlunparse, parse_qsl, urlencode
+from urllib.parse import urlparse, urlunparse, parse_qsl, urlencode
 
 from . import VERSION
 
@@ -53,7 +52,7 @@ def json_encode(obj):
     try:
         return json_encode.encoder.encode(obj)
     except AttributeError:
-        json_encode.encoder = DjangoJSONEncoder(default=six.text_type)
+        json_encode.encoder = DjangoJSONEncoder(default=str)
         return json_encode(obj)
 
 
@@ -92,7 +91,7 @@ def context(params):
                     # make box discardable by default
                     msg["discardable"] = msg.get("discardable", True)
                     msg_hash = (
-                        six.text_type(msg["message"]).encode("utf-8") +
+                        str(msg["message"]).encode("utf-8") +
                         msg["type"].encode("utf-8")
                     )
                     # hash depend of the rendering language
@@ -125,10 +124,10 @@ def import_attr(path):
         :return: The python object pointed by the dotted path or the python object unchanged
     """
     # if we got a str, decode it to unicode (normally it should only contain ascii)
-    if isinstance(path, six.binary_type):
+    if isinstance(path, bytes):
         path = path.decode("utf-8")
     # if path is not an unicode, return it unchanged (may be it is already the attribute to import)
-    if not isinstance(path, six.text_type):
+    if not isinstance(path, str):
         return path
     if u"." not in path:
         ValueError("%r should be of the form `module.attr` and we just got `attr`" % path)
@@ -261,12 +260,8 @@ def update_url(url, params):
         else:
             return data
 
-    if six.PY3:
     url = to_unicode(url)
     params = {to_unicode(key): to_unicode(value) for (key, value) in params.items()}
-    else:
-        url = to_bytes(url)
-        params = {to_bytes(key): to_bytes(value) for (key, value) in params.items()}
 
     url_parts = list(urlparse(url))
     query = dict(parse_qsl(url_parts[4], keep_blank_values=True))
@@ -567,13 +562,11 @@ class LdapHashUserPassword(object):
                 cls._schemes_to_hash[scheme](password + salt).digest() + salt
             )
         except KeyError:
-            if six.PY3:
             password = password.decode(charset)
             salt = salt.decode(charset)
             if not crypt_salt_is_valid(salt):
                 raise cls.BadSalt("System crypt implementation do not support the salt %r" % salt)
             hashed_password = crypt.crypt(password, salt)
-            if six.PY3:
             hashed_password = hashed_password.encode(charset)
             return scheme + hashed_password
 
@@ -639,9 +632,9 @@ def check_password(method, password, hashed_password, charset):
             ``False`` otherwise
         :rtype: bool
     """
-    if not isinstance(password, six.binary_type):
+    if not isinstance(password, bytes):
         password = password.encode(charset)
-    if not isinstance(hashed_password, six.binary_type):
+    if not isinstance(hashed_password, bytes):
         hashed_password = hashed_password.encode(charset)
     if method == "plain":
         return password == hashed_password
@@ -652,7 +645,6 @@ def check_password(method, password, hashed_password, charset):
             salt = hashed_password[:9]
         else:
             salt = hashed_password[:2]
-        if six.PY3:
         password = password.decode(charset)
         salt = salt.decode(charset)
         hashed_password = hashed_password.decode(charset)

requirements-dev.txt

@@ -2,7 +2,6 @@ setuptools>=5.5
 requests>=2.4
 requests_futures>=0.9.5
 lxml>=3.4
-six>=1.8
 tox>=1.8.1
 pytest>=7
 pytest-django>=2.8.0

requirements.txt

@@ -3,4 +3,3 @@ setuptools>=5.5
 requests>=2.4
 requests_futures>=0.9.5
 lxml>=3.4
-six>=1.8

setup.py

@@ -62,7 +62,7 @@ if __name__ == '__main__':
         keywords=['django', 'cas', 'cas3', 'server', 'sso', 'single sign-on', 'authentication', 'auth'],
         install_requires=[
             'Django >= 1.11,<4.2', 'requests >= 2.4', 'requests_futures >= 0.9.5',
-            'lxml >= 3.4', 'six >= 1'
+            'lxml >= 3.4'
         ],
         url="https://github.com/nitmir/django-cas-server",
         download_url="https://github.com/nitmir/django-cas-server/releases/latest",