python: add django 3 app

python/django3/.gitignore

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+.venv

python/django3/Dockerfile

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+FROM python:3.8
+
+WORKDIR /project
+
+COPY ./requirements.txt /project
+
+RUN pip install -r requirements.txt

python/django3/app/asgi.py

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+"""
+ASGI config for app project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "app.settings")
+
+application = get_asgi_application()

python/django3/app/settings.py

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+"""
+Django settings for app project.
+
+Generated by 'django-admin startproject' using Django 3.1.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/3.1/ref/settings/
+"""
+
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve(strict=True).parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/3.1/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = "le@f+r+o4qqd_s=i6$1d313h2)xj#j1*k5immu*7qz)!g-vw7o"
+
+# 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",
+]
+
+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 = "app.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 = "app.wsgi.application"
+
+
+# Database
+# https://docs.djangoproject.com/en/3.1/ref/settings/#databases
+
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": BASE_DIR / "db.sqlite3",
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/3.1/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/3.1/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/3.1/howto/static-files/
+
+STATIC_URL = "/static/"

python/django3/app/urls.py

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+"""app URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/3.1/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path
+
+from . import views
+
+
+urlpatterns = [
+    path("admin/", admin.site.urls),
+    path("download/", views.file_response),
+    path("streaming/", views.streaming_response),
+]

python/django3/app/views.py

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+import time
+import random
+
+from django.http import HttpResponse, StreamingHttpResponse, FileResponse
+
+
+def file_response(request):
+    return FileResponse(open("manage.py", "rb"))
+
+
+def get_resp():
+    for i in range(0, 10):
+        time.sleep(random.random() / 10)
+        yield "%d\n" % i
+
+
+def streaming_response(request):
+    return StreamingHttpResponse(get_resp())

python/django3/app/wsgi.py

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+"""
+WSGI config for app 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/3.1/howto/deployment/wsgi/
+"""
+
+import os
+
+from ddtrace.contrib.wsgi import DDWSGIMiddleware
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "app.settings")
+
+application = DDWSGIMiddleware(get_wsgi_application())

python/django3/docker-compose.yml

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+version: "3"
+
+services:
+  agent:
+    image: datadog/agent:latest
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+      - /proc/:/host/proc/:ro
+      - /sys/fs/cgroup/:/host/sys/fs/cgroup:ro
+    ports:
+      - 127.0.0.1:8126:8126/tcp
+      - 127.0.0.1:8125:8125/udp
+    environment:
+      - DD_API_KEY=${DD_API_KEY}
+      - DD_APM_ENABLED=true
+      - DD_APM_NON_LOCAL_TRAFFIC=true
+      - DD_LOG_LEVEL=INFO
+      - DD_DOGSTATSD_NON_LOCAL_TRAFFIC=true
+      - DD_AC_EXCLUDE=name:datadog-agent
+  app_dev:
+    build:
+      context: .
+      dockerfile: ./Dockerfile
+    command: ddtrace-run python manage.py runserver 0.0.0.0:8000
+    environment:
+      - DD_ENV=test
+      - "DD_TRACE_AGENT_URL=http://agent:8126"
+      - DD_SERVICE=django-test
+      - DD_DJANGO_CACHE_SERVICE_NAME=cache
+      - DD_DJANGO_DATABASE_SERVICE_NAME=django-test
+      - DD_DJANGO_USE_HANDLER_RESOURCE_FORMAT=true
+      - DD_SQLITE_SERVICE=test-db
+      - DD_PROFILING_ENABLED=true
+      # - DD_TRACE_DEBUG=true
+    ports:
+      - 8000:8000
+    volumes:
+      - .:/project
+

python/django3/manage.py

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+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "app.settings")
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        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?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == "__main__":
+    main()

python/django3/requirements.txt

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+alabaster==0.7.12
+appdirs==1.4.4
+attrs==20.3.0
+Babel==2.8.1
+black==20.8b1
+certifi==2020.11.8
+chardet==3.0.4
+click==7.1.2
+Cython==0.29.21
+ddtrace
+distlib==0.3.1
+docutils==0.16
+dulwich==0.20.11
+filelock==3.0.12
+flake8==3.8.4
+gevent==20.9.0
+greenlet==0.4.17
+idna==2.10
+imagesize==1.2.0
+iniconfig==1.1.1
+intervaltree==3.1.0
+Jinja2==2.11.2
+MarkupSafe==1.1.1
+mccabe==0.6.1
+mock==4.0.2
+multidict==5.0.0
+mypy-extensions==0.4.3
+opentracing==2.3.0
+packaging==20.4
+pathspec==0.8.1
+pbr==5.5.1
+pluggy==0.13.1
+protobuf==3.13.0
+py==1.9.0
+py-cpuinfo==7.0.0
+pycodestyle==2.6.0
+pyenchant==3.1.1
+pyflakes==2.2.0
+Pygments==2.7.2
+pyparsing==2.4.7
+pytest==6.1.2
+pytest-benchmark==3.2.3
+pytz==2020.4
+PyYAML==5.3.1
+regex==2020.11.11
+reno==3.2.0
+requests==2.25.0
+riot==0.2.0
+six==1.15.0
+snowballstemmer==2.0.0
+sortedcontainers==2.3.0
+Sphinx==3.3.0
+sphinx-rtd-theme==0.5.0
+sphinxcontrib-applehelp==1.0.2
+sphinxcontrib-devhelp==1.0.2
+sphinxcontrib-htmlhelp==1.0.3
+sphinxcontrib-jsmath==1.0.1
+sphinxcontrib-qthelp==1.0.3
+sphinxcontrib-serializinghtml==1.1.4
+sphinxcontrib-spelling==7.1.0
+tenacity==6.2.0
+toml==0.10.2
+typed-ast==1.4.1
+typing-extensions==3.7.4.3
+urllib3==1.26.1
+vcrpy==4.1.1
+virtualenv==20.1.0
+wrapt==1.12.1
+yarl==1.6.2
+zope.event==4.5.0
+zope.interface==5.2.0