Django example

Author: miguelgrinberg

examples/wsgi/README.rst

@@ -2,9 +2,9 @@ Socket.IO WSGI Examples
 =======================
 
 This directory contains example Socket.IO applications that work together with
-WSGI frameworks. These examples all use Flask to serve the client application to
-the web browser, but they should be easily adapted to use other WSGI compliant
-frameworks.
+WSGI frameworks. These examples use Flask or Django to serve the client
+application to the web browser, but they should be easily adapted to use other
+WSGI compliant frameworks.
 
 app.py
 ------
@@ -24,6 +24,12 @@ time to the page.
 This is an ideal application to measure the performance of the different
 asynchronous modes supported by the Socket.IO server.
 
+django_example
+--------------
+
+This is a version of the "app.py" application described above, that is based
+on the Django web framework.
+
 Running the Examples
 --------------------
 
@@ -36,13 +42,20 @@ or::
 
     $ python latency.py
 
+or::
+
+    $ cd django_example
+    $ ./manage.py runserver
+
 You can then access the application from your web browser at
-``http://localhost:5000``.
+``http://localhost:5000`` (``app.py`` and ``latency.py``) or
+``http://localhost:8000`` (``django_example``).
 
 Near the top of the ``app.py`` and ``latency.py`` source files there is a
 ``async_mode`` variable that can be edited to swich to the other asynchornous
 modes. Accepted values for ``async_mode`` are ``'threading'``, ``'eventlet'``
-and ``'gevent'``.
+and ``'gevent'``. For ``django_example``, the async mode can be set in the
+``django_example/socketio_app/views.py`` module.
 
 Note 1: when using the ``'eventlet'`` mode, the eventlet package must be
 installed in the virtual environment::

examples/wsgi/django_example/django_example/__init__.py

@@ -0,0 +1,121 @@
+"""
+Django settings for django_example project.
+
+Generated by 'django-admin startproject' using Django 1.11.1.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/1.11/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/1.11/ref/settings/
+"""
+
+import os
+
+# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
+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/1.11/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = '+vk#7#92ncb*y)8^$7sd&99%^+xc+t)nmamacbp8^vgjy(&g-9'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'socketio_app',
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    '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',
+]
+
+ROOT_URLCONF = 'django_example.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 = 'django_example.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/1.11/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/1.11/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/1.11/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/1.11/howto/static-files/
+
+STATIC_URL = '/static/'

examples/wsgi/django_example/django_example/settings.py

@@ -0,0 +1,22 @@
+"""django_example URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/1.11/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.conf.urls import url, include
+    2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
+"""
+from django.conf.urls import url, include
+from django.contrib import admin
+
+urlpatterns = [
+    url(r'', include('socketio_app.urls')),
+    url(r'^admin/', admin.site.urls),
+]

examples/wsgi/django_example/django_example/urls.py

@@ -0,0 +1,20 @@
+"""
+WSGI config for django_example project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/1.11/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+from socketio import Middleware
+
+from socketio_app.views import sio
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "django_example.settings")
+
+django_app = get_wsgi_application()
+application = Middleware(sio, django_app)

examples/wsgi/django_example/django_example/wsgi.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+import os
+import sys
+
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "django_example.settings")
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError:
+        # The above import may fail for some other reason. Ensure that the
+        # issue is really that Django is missing to avoid masking other
+        # exceptions on Python 2.
+        try:
+            import django
+        except ImportError:
+            raise ImportError(
+                "Couldn't import Django. Are you sure it's installed and "
+                "available on your PYTHONPATH environment variable? Did you "
+                "forget to activate a virtual environment?"
+            )
+        raise
+    execute_from_command_line(sys.argv)

examples/wsgi/django_example/manage.py

@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.

examples/wsgi/django_example/socketio_app/__init__.py

@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class SocketioAppConfig(AppConfig):
+    name = 'socketio_app'