Add Django Samples (#636)

Contains two sets of samples - one for the “Google auth” system and one for the “Django
user auth” system.

samples/django/README.md

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+# Django Samples
+
+These two sample Django apps provide a skeleton for the two main use cases of the
+`oauth2client.contrib.django_util` helpers.
+
+Please see the 
+[core docs](https://oauth2client.readthedocs.io/en/latest/) for more information and usage examples.
+
+## google_user
+
+This is the simpler use case of the library. It assumes you are using Google OAuth as your primary
+authorization and authentication mechanism for your application. Users log in with their Google ID 
+and their OAuth2 credentials are stored inside the session. 
+
+## django_user
+
+This is the use case where the application is already using the Django authorization system and
+has a Django model with a `django.contrib.auth.models.User` field, and would like to attach
+a Google OAuth2 credentials object to that model. Users have to login, and then can login with 
+their Google account to associate the Google account with the user in the Django system.
+Credentials will be stored in the Django ORM backend.

samples/django/django_user/manage.py

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+#!/usr/bin/env python
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import sys
+
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "myoauth.settings")
+
+    from django.core.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)

samples/django/django_user/myoauth/settings.py

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+# Copyright 2016 Google Inc.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
+import os
+
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'eiw+mvmua#98n@p2xq+c#liz@r2&#-s07nkgz)+$zcl^o4$-$o'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+# Application definition
+
+INSTALLED_APPS = (
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'polls',
+    'oauth2client.contrib.django_util',
+)
+
+MIDDLEWARE_CLASSES = (
+    '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',
+    'django.middleware.security.SecurityMiddleware',
+)
+
+ROOT_URLCONF = 'myoauth.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'myoauth.wsgi.application'
+
+# Database
+# https://docs.djangoproject.com/en/1.8/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
+    }
+}
+
+# Internationalization
+# https://docs.djangoproject.com/en/1.8/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_L10N = True
+
+USE_TZ = True
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/1.8/howto/static-files/
+
+STATIC_URL = '/static/'
+
+GOOGLE_OAUTH2_CLIENT_ID = 'YOUR_CLIENT_ID'
+
+GOOGLE_OAUTH2_CLIENT_SECRET = 'YOUR_CLIENT_SECRET'
+
+GOOGLE_OAUTH2_SCOPES = (
+    'email', 'profile')
+
+GOOGLE_OAUTH2_STORAGE_MODEL = {
+    'model': 'polls.models.CredentialsModel',
+    'user_property': 'user_id',
+    'credentials_property': 'credential',
+}
+
+LOGIN_URL = '/login'

samples/django/django_user/myoauth/urls.py

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+# Copyright 2016 Google Inc.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from django.conf import urls
+from django.contrib import admin
+import django.contrib.auth.views
+from polls import views
+
+import oauth2client.contrib.django_util.site as django_util_site
+
+
+urlpatterns = [
+    urls.url(r'^$', views.index),
+    urls.url(r'^profile_required$', views.get_profile_required),
+    urls.url(r'^profile_enabled$', views.get_profile_optional),
+    urls.url(r'^admin/', urls.include(admin.site.urls)),
+    urls.url(r'^login', django.contrib.auth.views.login, name="login"),
+    urls.url(r'^oauth2/', urls.include(django_util_site.urls)),
+]

samples/django/django_user/myoauth/wsgi.py

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+# Copyright 2016 Google Inc.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "myoauth.settings")
+
+application = get_wsgi_application()

samples/django/django_user/polls/models.py

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+# Copyright 2016 Google Inc.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from django.contrib.auth.models import User
+from django.db import models
+
+from oauth2client.contrib.django_util.models import CredentialsField
+
+
+class CredentialsModel(models.Model):
+    user_id = models.OneToOneField(User)
+    credential = CredentialsField()

samples/django/django_user/polls/templates/registration/login.html

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+<!--
+# Copyright 2016 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+-->
+
+{% if form.errors %}
+<p>Your username and password didn't match. Please try again.</p>
+{% endif %}
+
+{% if next %}
+{% if user.is_authenticated %}
+<p>Your account doesn't have access to this page. To proceed,
+    please login with an account that has access.</p>
+{% else %}
+<p>Please login to see this page.</p>
+{% endif %}
+{% endif %}
+
+<form method="post" action="{% url 'login' %}">
+    {% csrf_token %}
+    <table>
+        <tr>
+            <td>{{ form.username.label_tag }}</td>
+            <td>{{ form.username }}</td>
+        </tr>
+        <tr>
+            <td>{{ form.password.label_tag }}</td>
+            <td>{{ form.password }}</td>
+        </tr>
+    </table>
+
+    <input type="submit" value="login" />
+    <input type="hidden" name="next" value="{{ next }}" />
+</form>

samples/django/django_user/polls/views.py

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+# Copyright 2016 Google Inc.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from django.http import HttpResponse
+
+from oauth2client.contrib.django_util import decorators
+
+
+def index(request):
+    return HttpResponse("Hello world!")
+
+
+@decorators.oauth_required
+def get_profile_required(request):
+    resp, content = request.oauth.http.request(
+        'https://www.googleapis.com/plus/v1/people/me')
+    return HttpResponse(content)
+
+
+@decorators.oauth_enabled
+def get_profile_optional(request):
+    if request.oauth.has_credentials():
+        # this could be passed into a view
+        # request.oauth.http is also initialized
+        return HttpResponse('User email: {}'.format(
+            request.oauth.credentials.id_token['email']))
+    else:
+        return HttpResponse(
+            'Here is an OAuth Authorize link:<a href="{}">Authorize</a>'
+            .format(request.oauth.get_authorize_redirect()))

samples/django/django_user/requirements.txt

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+Django==1.10.0
+oauth2client==3.0.0
+jsonpickle==0.9.3

samples/django/google_user/manage.py

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+#!/usr/bin/env python
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import sys
+
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "myoauth.settings")
+
+    from django.core.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)