app.py

import os

from flask import Flask, request, jsonify

app = Flask(__name__)


@app.route('/')
def sample():
    return jsonify(
        message=f'This is the {os.environ["APP"]} application.',
        server=request.base_url,
        custom_header=request.headers.get('MyCustomHeader', None),
        host_header=request.headers.get('Host', request.base_url),
        custom_params=request.args.get('MyCustomParam', None),
        query_strings=request.query_string.decode('utf-8'),
    )


@app.route('/healthcheck')
def healthcheck():
    return 'OK'


@app.route('/v1')
def v1():
    return "This is V1"


@app.route('/v2')
def v2():
    return "This is V2"


if __name__ == '__main__':
    app.run(host='0.0.0.0')