Commit v0.4

v0.4 - app.create_app(), AppConfig, RUN apk add tzdata

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Files changed (4)

• +4 -0 [M] web/Dockerfile
• +10 -0 [A] web/app/init.py
• +10 -0 [A] web/config.py
• +9 -2 [M] web/flaskapp.py

File web/Dockerfile MODIFIED

• Run apk add tzdata to install timezone support within the container
• Set the environment variable TZ America/Los_Angeles.
• The change should be visible at the existing route /info/date.

+# add tzdata to base image; set timezone environment variable
+RUN apk add --no-cache tzdata
+ENV TZ America/Los_Angeles

File web/app/init.py ADDED

• The __init__.py file (blank or otherwise) marks the app directory as a package.
• Move app = Flask(__name__) from flaskapp.py into a function defined on this main app package.
• Update values in app.config by passing an instance our new AppConfig object to the application.
• Call AppConfig.init_app() to perform other setup operations.
• Return an instance of the application.

+from flask import Flask
+from config import AppConfig
+
+def create_app():
+    app = Flask(__name__)
+
+    app.config.from_object(AppConfig)
+    AppConfig.init_app(app)
+
+    return app

File web/config.py ADDED

• A minimal AppConfig object, passed to the application via app.config.from_object(AppConfig)
• Set a single value, SECRET_KEY.
• The empty method init_app() will provide a location for other setup operations.

+import os
+
+class AppConfig(object):
+    SECRET_KEY = os.environ.get('SECRET_KEY') or 'my-super-secret-app-key'
+
+    @staticmethod
+    def init_app(app):
+        pass

File web/flaskapp.py MODIFIED

• Replace app = Flask(__name__) with app = create_app(), as defined in app/__init__.py.
• Create new route /info/config to display app.config values.

-from flask import Flask
-app = Flask(__name__)

+from app import create_app
+app = create_app()

...

+@app.route('/info/config')
+def app_config():
+    cnf = dict(app.config)
+    return "Current Config : %s" % cnf

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Commit-v0.3 | Commit-v0.4 | Commit-v0.5