update to django-2, python3, and based on an alpine container

Dockerfile

@@ -1,16 +1,13 @@
-FROM python:2.7
+FROM python:3-alpine
 
 MAINTAINER Jeffrey Forman <code@jeffreyforman.net>
 
-ENV DEBIAN_FRONTEND noninteractive
-
-RUN apt-get update \
-     && rm -rf /var/lib/apt/lists/*
-
 WORKDIR /code
 COPY . /code/
 
-RUN pip install -r requirements.txt
+RUN apk add --no-cache nsd build-base python3-dev libffi-dev openssl-dev libc-dev libxslt-dev \
+  && pip install --upgrade pip \
+  && pip install --no-cache-dir -r requirements.txt
 
 EXPOSE 8000
 

README.markdown

@@ -86,7 +86,6 @@ bootstrapping.
 ```
 python manage.py migrate
 python manage.py createsuperuser
-...
 python manage.py dumpdata -o binder/fixtures/initial_data.json
 ```
 

binder/admin.py

@@ -1,6 +1,6 @@
 import binascii
 import dns.tsigkeyring
-from models import BindServer, Key
+from binder.models import BindServer, Key
 from django.contrib import admin
 from django.forms import ModelForm, ValidationError
 

binder/forms.py

@@ -8,7 +8,7 @@ from django.core import validators
 from django.forms import ValidationError
 
 # App Imports
-from models import Key
+from binder.models import Key
 
 
 class CustomUnicodeListField(forms.CharField):

binder/helpers.py

@@ -170,7 +170,7 @@ def ip_info(host_name):
             if s_family == 10 and s_type == 1:
                 ipv6_count += 1
                 info.append(["IPv6 (%d)" % ipv6_count, s_sockaddr[0]])
-    except socket.gaierror, err:
+    except (socket.gaierror, err):
         info.append(["Error", "Unable to resolve %s: %s" % (host_name, err)])
 
     return info

binder/middlewares.py

@@ -2,22 +2,26 @@ from django.conf import settings
 from django.contrib.auth import REDIRECT_FIELD_NAME
 from django.http import HttpResponseRedirect
 
-class LoginRequiredMiddleware(object):
+class LoginRequiredMiddleware:
     """Middleware to redirect to the login page if the user isn't authenticated
 
     After successful authentication the user is redirected back to the page he
     initially wanted to access.
     """
-    def process_request(self, request):
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
         # allow access to the login url
+        response = self.get_response(request)
         if request.path == settings.LOGIN_URL:
-            return
+            return response
         # redirect to the login url if the user isn't authenticated
-        if not request.user.is_authenticated():
+        if not request.user.is_authenticated:
             if request.path not in (settings.LOGIN_URL,
                                     settings.LOGIN_REDIRECT_URL):
                 return HttpResponseRedirect('%s?%s=%s' % (settings.LOGIN_URL,
                                                           REDIRECT_FIELD_NAME,
                                                           request.path))
-            else:
             return HttpResponseRedirect(settings.LOGIN_URL)
+        return response

binder/migrations/0001_initial.py

@@ -1,11 +1,13 @@
-# -*- coding: utf-8 -*-
+# Generated by Django 2.1.5 on 2019-02-12 01:12
-from __future__ import unicode_literals
 
-from django.db import models, migrations
+from django.db import migrations, models
+import django.db.models.deletion
 
 
 class Migration(migrations.Migration):
 
+    initial = True
+
     dependencies = [
     ]
 
@@ -13,32 +15,30 @@ class Migration(migrations.Migration):
         migrations.CreateModel(
             name='BindServer',
             fields=[
-                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('hostname', models.CharField(help_text=b'Host name or IP address of the BIND server.', unique=True, max_length=255)),
+                ('hostname', models.CharField(help_text='Host name or IP address of the BIND server.', max_length=255, unique=True)),
-                ('statistics_port', models.IntegerField(help_text=b'Port where the BIND server is serving statistics on.')),
+                ('dns_port', models.IntegerField(default=53, help_text='The port where the BIND server is listening for DNS requests. binder especially uses that port for the dynamic zone updates. In most cases you should always leave it at the default port 53.', verbose_name='DNS port')),
+                ('statistics_port', models.IntegerField(help_text='Port where the BIND server is serving statistics on.')),
             ],
             options={
                 'ordering': ['hostname'],
             },
-            bases=(models.Model,),
         ),
         migrations.CreateModel(
             name='Key',
             fields=[
-                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('name', models.CharField(help_text=b'A human readable name for the key to store, used for further references to the key.', unique=True, max_length=255)),
+                ('name', models.CharField(help_text='A human readable name for the key to store, used for further references to the key.', max_length=255, unique=True)),
-                ('data', models.CharField(help_text=b'The private part of the TSIG key.', max_length=255)),
+                ('data', models.CharField(help_text='The private part of the TSIG key.', max_length=255)),
-                ('algorithm', models.CharField(help_text=b'The algorithm which has been used for the key.', max_length=255, choices=[(b'HMAC-MD5.SIG-ALG.REG.INT', b'MD5'), (b'hmac-sha1', b'SHA1'), (b'hmac-sha256', b'SHA256'), (b'hmac-sha384', b'SHA384'), (b'hmac-sha512', b'SHA512')])),
+                ('algorithm', models.CharField(choices=[('HMAC-MD5.SIG-ALG.REG.INT', 'MD5'), ('hmac-sha1', 'SHA1'), ('hmac-sha256', 'SHA256'), ('hmac-sha384', 'SHA384'), ('hmac-sha512', 'SHA512')], help_text='The algorithm which has been used for the key.', max_length=255)),
             ],
             options={
                 'ordering': ['name'],
             },
-            bases=(models.Model,),
         ),
         migrations.AddField(
             model_name='bindserver',
             name='default_transfer_key',
-            field=models.ForeignKey(blank=True, to='binder.Key', help_text=b'The default key to use for all actions with this DNS server as long as no other key is specified explicitly.', null=True),
+            field=models.ForeignKey(blank=True, help_text='The default key to use for all actions with this DNS server as long as no other key is specified explicitly.', null=True, on_delete=django.db.models.deletion.CASCADE, to='binder.Key'),
-            preserve_default=True,
         ),
     ]

binder/migrations/0002_bindserver_dns_port.py

@@ -1,20 +0,0 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-
-from django.db import models, migrations
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('binder', '0001_initial'),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name='bindserver',
-            name='dns_port',
-            field=models.IntegerField(default=53, verbose_name='DNS port', help_text=b'The port where the BIND server is listening for DNSrequests. binder especially uses that port for the dynamic zone updates. In most cases you should always leave it at the default port 53.'),
-            preserve_default=True,
-        ),
-    ]

binder/models.py

@@ -48,7 +48,7 @@ class Key(models.Model):
 
     def save(self, *args, **kwargs):
         f = Fernet(settings.FERNET_KEY)
-        crypted_key = f.encrypt(bytes(self.data))
+        crypted_key = f.encrypt(bytes(self.data, encoding="utf8"))
         self.data = crypted_key
         super(Key, self).save(*args, **kwargs)
 
@@ -59,7 +59,7 @@ class Key(models.Model):
         try:
             key_data = self.decrypt_keydata()
             keyring = dns.tsigkeyring.from_text({self.name: key_data})
-        except binascii.Error, err:
+        except (binascii.Error, err):
             raise exceptions.KeyringException("Incorrect key data. Verify key: %s. Reason: %s" % (self.name, err))
 
         return keyring
@@ -99,6 +99,7 @@ class BindServer(models.Model):
     default_transfer_key = models.ForeignKey(Key,
                                              null=True,
                                              blank=True,
+                                             on_delete=models.CASCADE,
                                              help_text="The default key to use for all actions "
                                              "with this DNS server as long as no other key is "
                                              "specified explicitly.")
@@ -153,7 +154,7 @@ class BindServer(models.Model):
         except dns.tsig.PeerBadKey:
             # The incorrect TSIG key was selected for transfers.
             raise exceptions.TransferException("Unable to list zone records because of a TSIG key mismatch.")
-        except socket.error, err:
+        except socket.error as err:
             # Thrown when the DNS server does not respond for a zone transfer (XFR).
             raise exceptions.TransferException("DNS server did not respond for transfer. Reason: %s" % err)
         except dns.exception.FormError:

binder/settings.py

@@ -97,13 +97,14 @@ TEMPLATES = [
     }
 ]
 
-MIDDLEWARE_CLASSES = (
+MIDDLEWARE = (
-    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    'django.middleware.security.SecurityMiddleware',
-    'django.middleware.csrf.CsrfViewMiddleware',
-    'django.middleware.common.CommonMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
     'binder.middlewares.LoginRequiredMiddleware',
 )
 

binder/tests/testModels.py

@@ -54,7 +54,8 @@ class Model_Key_Tests(TestCase):
         key_1.save()
         decrypt_key = Fernet(settings.FERNET_KEY)
         decrypted_tsig_key = decrypt_key.decrypt(bytes(key_1.data))
-        self.assertEqual(original_tsig_key, decrypted_tsig_key)
+        self.assertEqual(bytes(original_tsig_key, encoding="utf8"),
+                        decrypted_tsig_key)
 
     @override_settings(FERNET_KEY='yfE1kyYLNlpR-2ybdB-Mvs_k1ZoDMFFVtE_PpWYxVgs=')
     def test_FernetKeyDecryptionFailure(self):

binder/tests/testViews.py

@@ -1,7 +1,7 @@
 from django.test import TestCase
 from django.test.client import Client
 from django.contrib.auth.models import User
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 
 from binder import models
 
@@ -80,7 +80,7 @@ class PostTests(TestCase):
         self.assertContains(response,
                             '<input type="hidden" id="zone_name" name="zone_name" value="testzone1.test.net" />', html=True)
         self.assertContains(response,
-                            '<input type="hidden" id="rr_list" name="rr_list" value="[u&#39;testrecord1.testzone1.test.net&#39;, u&#39;testrecord2.testzone1.test.net&#39;]"/>',
+                            '<input type="hidden" id="rr_list" name="rr_list" value="[&#39;testrecord1.testzone1.test.net&#39;, &#39;testrecord2.testzone1.test.net&#39;]"/>',
                             html=True)
         self.assertContains(response,
                             '<input type="hidden" id="dns_server" name="dns_server" value="testserver.test.net" />',

binder/urls.py

@@ -1,14 +1,16 @@
 from django.conf.urls import include, url
 from django.contrib import admin
-import django.contrib.auth.views
+from django.contrib.auth import login
+from django.contrib.auth.views import logout_then_login
+from django.contrib.auth import views as auth_views
 import binder.views
 admin.autodiscover()
 
 urlpatterns = [
-    url(r'^admin/', include(admin.site.urls)),
+    url(r'^admin/', admin.site.urls),
 
-    url(r'^accounts/login/$', django.contrib.auth.views.login, name='login'),
+    url(r'^accounts/login/$', auth_views.LoginView.as_view(), name='login'),
-    url(r'^accounts/logout/$', django.contrib.auth.views.logout_then_login, name='logout'),
+    url(r'^accounts/logout/$', logout_then_login, name='logout'),
 
     url(r'^$', binder.views.home_index, name="index"),
     url(r'^server_list/$', binder.views.view_server_list, name="server_list"),

develop.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 
 docker build -t jforman/binder:latest .
-docker run -it --rm -v `pwd`:/code/ -w /code/ jforman/binder:latest /bin/bash
+docker run -it --rm -v `pwd`:/code/ -w /code/ jforman/binder:latest /bin/ash

requirements.txt

@@ -1,6 +1,5 @@
+Django
 cryptography
-Django>=1.10
 dnspython>=1.11
 pybindxml>=0.7
 lxml
-mysqlclient