Skip to main content

Minimal API for defining pages of Flask-based backends independently from the actual backend infrastructure

Project description

Mara page

mara-page PyPI - License PyPI version Slack Status

Minimal API for defining pages of Flask-based backends independently from the actual backend infrastructure.

When a web app is spread across many independent Flask blueprints, then this library can be used to add

  • navigation entries
  • page titles
  • resource-based ACL protection
  • page-specific CSS and JS files

without having access to a global layout or the Flask app.

The library provides a drop-in werkzeug Response class that is enriched with additional information that a backend can use to render the final html page.


This is a simple web ui for displaying the current time:

"""Clock UI"""

import flask
from awesome_clock import clock
from mara_page import acl, navigation, response, bootstrap, _

# The flask blueprint that handles
blueprint = flask.Blueprint('awesome_clock', __name__, url_prefix='/clock', static_folder='static')

# Defines an ACL resource (needs to be handled by the application)
acl_resource = acl.AclResource('Clock')

def navigation_entry():
    """Defines a part of the navigation tree (needs to be handled by the application)"""
    return navigation.NavigationEntry(
        label='Awesome clock', icon='clock-o', description='Something that tells the time',
                label='What time is it now?',
                uri_fn=lambda: flask.url_for('awesome_clock.clock_page', when='now'),
                icon='question-circle', description='Should be able to display the current time'),

                label='And now?', icon='refresh', description='For the impatient',
                uri_fn=lambda: flask.url_for('awesome_clock.clock_page', when='and-now'))

@acl.require_permission(acl_resource)  # Requires permission to the `'Clock'` resource
def clock_page(when: str):
    """Defines the `/clock` page"""
    return response.Response(
        # The actual page content (can be also a call to `flask.render_template`
        # or anything else that produces a string)
        html=bootstrap.card(header_left=_.h1['What time is it now?'],
                            body=[_.p['The current time is ', str(clock.what_time_is_it_now())],
                                  _.img(src=flask.url_for('awesome_clock.static', filename='cuckoo-clock.jpg'),
        # The page title
        title='Awesome clock',

        # Action buttons
            response.ActionButton('javascript:location.reload()', 'Refresh', 'Refresh clock', 'refresh'),
            response.ActionButton('javascript:location.reload()', 'Update', 'Refresh clock', 'clock-o')

It is up to the actual Flask app to define how to render such a response and what to do with the ACL resources and navigation entries. The mara app will render the response like this:

Example backend


Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

mara-page-1.6.1.tar.gz (10.2 kB view hashes)

Uploaded Source

Built Distribution

mara_page-1.6.1-py3-none-any.whl (10.6 kB view hashes)

Uploaded Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page