Drop Python 2.7 and Django 1.11 support

* Stop testing against Python 2.7 and Django 1.11
* Remove six
* Remove Python 2 from trove classifiers

Fixes #17

.travis.yml

@@ -3,12 +3,10 @@ language: python
 dist: xenial
 
 python:
-  - "2.7"
   - "3.5"
   - "3.6"
   - "3.7"
   - "3.8"
-  - pypy2.7-6.0
   - pypy3.5-6.0
 
 install: travis_retry pip install -q tox

sendfile/__init__.py

@@ -8,7 +8,6 @@
 from django.http import Http404
 from django.utils.encoding import force_text
 from django.utils.http import urlquote
-import six
 
 from ._version import get_versions
 
@@ -89,10 +88,7 @@ def sendfile(request, filename, attachment=False, attachment_filename=None,
     if attachment_filename:
         attachment_filename = force_text(attachment_filename)
         ascii_filename = unicodedata.normalize('NFKD', attachment_filename)
-        ascii_filename = ascii_filename.encode('ascii', 'ignore')
-
-        if six.PY3:
-            ascii_filename = ascii_filename.decode()
+        ascii_filename = ascii_filename.encode('ascii', 'ignore').decode()
         parts.append('filename="%s"' % ascii_filename)
 
         if ascii_filename != attachment_filename:

sendfile/backends/xsendfile.py

@@ -1,12 +1,8 @@
 from django.http import HttpResponse
-import six
 
 
 def sendfile(request, filename, **kwargs):
-    filename = six.text_type(filename)
-    if six.PY2:
-        filename = filename.encode("utf-8")
-
+    filename = str(filename)
     response = HttpResponse()
     response['X-Sendfile'] = filename
 

setup.py

@@ -17,7 +17,7 @@
     url='https://github.com/moggers87/django-sendfile2',
     license='BSD',
 
-    install_requires=['django', 'six'],
+    install_requires=['django'],
     packages=['sendfile', 'sendfile.backends'],
     package_dir={
         'sendfile': 'sendfile',
@@ -35,8 +35,6 @@
         'Intended Audience :: Developers',
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',

tox.ini

@@ -1,13 +1,11 @@
 [tox]
 envlist =
-    py{py,27,py3,35,36,37}-django111
     py{py3,35,36,37,38}-django{21,22}
     flake8
 
 [testenv]
 usedevelop=True
 deps =
-    django111: Django>=1.11,<1.12
     django21: Django>=2.1,<2.2
     django22: Django>=2.2,<2.3
 changedir = examples/protected_downloads