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Canonical Webteam Flask-Base

Flask extension that applies common configurations to all of webteam's flask apps.

Usage

from canonicalwebteam.flask_base.app import FlaskBase

app = FlaskBase(__name__, "app.name")

Or:

from canonicalwebteam.flask_base.app import FlaskBase

app = FlaskBase(
    __name__,
    "app.name",
    template_404="404.html",
    template_500="500.html",
    favicon_url="/static/favicon.ico",
)

Features

Redirects and deleted paths

FlaskBase uses yaml-responses to allow easy configuration of redirects and return of deleted responses, by creating redirects.yaml, permanent-redirects.yaml and deleted.yaml in the site root directory.

Error templates

FlaskBase can optionally use templates to generate the 404 and 500 error responses:

app = FlaskBase(
    __name__,
    "app.name",
    template_404="404.html",
    template_500="500.html",
)

This will lead to e.g. http://localhost/non-existent-path returning a 404 status with the contents of templates/404.html.

Redirect /favicon.ico

FlaskBase can optionally provide redirects for the commonly queried paths /favicon.ico, /robots.txt and /humans.txt to sensible locations:

from canonicalwebteam.flask_base.app import FlaskBase

app = FlaskBase(
    __name__,
    "app.name",
    template_404="404.html",
    template_500="500.html",
    favicon_url="/static/favicon.ico",
    robots_url="/static/robots.txt",
    humans_url="/static/humans.txt"
)

This will lead to e.g. http://localhost/favicon.ico returning a 302 redirect to http://localhost/static/favicon.ico.

Jinja2 helpers

You get two jinja2 helpers to use in your templates from flask-base:

  • now is a function that outputs the current date in the passed format - {{ now('%Y') }} -> YYYY
  • versioned_static is a function that fingerprints the passed asset - {{ versioned_static('asset.js') }} -> static/asset?v=asset-hash

robots.txt and humans.txt

If you create a robots.txt or humans.txt in the root of your project, these will be served at /robots.txt and /humans.txt respectively.

Tests

To run the tests execute SECRET_KEY=fake python3 -m unittest discover tests.