Main application file for Flask-based Ember frontend endpoint

main.py

#-*-coding: utf-8-*-
'''
Main application file for Flask-based Ember frontend endpoint
'''
import logging
import sys
 
from flask import Flask, request, redirect
 
from redis_pool import get_redis
 
# Gunicorn, by default, will search for the 'application' name, so use it
# for convenience
application = Flask('test')
 
# Set up logging on the application
application.logger.addHandler(logging.StreamHandler(sys.stderr))
application.logger.setLevel('INFO')
 
redis = get_redis()
 
@application.route('/', methods=['GET'])
def index():
    """
    This application:
    - First get the latest frontend deployed revision from Redis
    - Then return the index.html file stored in Redis under that exact key
    """
    current_key = redis.get('app-name:current')  # This is the reference to the revision deployed
 
    # Here comes the HTML
    return redis.get(current_key)
 
 
@application.errorhandler(404)
def page_not_found(e):
    """
    Because Ember uses the hash location to determine the route, we redirect
    URLs without the hash prefix in the base URL that results in 404 error to
    the equivalent with the hash.

    You need to add your own redirection logic here (adding a 'transition' query
    parameter to the index route and redirect it subsequently to the correct
    Ember route is one way to do it
    """
    if request.path.startswith('/'):
        # Do some work here depending on your own EmberJS code setup to redirect to the right
        # end point
        return 'MAGIC'
 
 
if __name__ == '__main__':
    application.run(debug=True)