app.py

from flask import Flask, jsonify, request
from sparkpost import SparkPost


app = Flask(__name__)
SPARKPOST_KEY = '<SPARKPOST_API_KEY>'
VALIDATION_CODE = '<OPEN_CHANNEL_PLATFORM_VALIDATION>'


@app.route('/message/push', methods=['POST'])
def message():
    payload = request.get_json(force=True, silent=True)
    sp = SparkPost(SPARKPOST_KEY)

    for content in payload["values"]:
        if content["payload"].get("title"):
            subject = content["payload"]['title']
        else:
            subject = "No subject"

        sp.transmissions.send(
            recipients=[content["target"]["address"]],
            text=content["payload"]["alert"],
            html='<p>{}</p>'.format(content["payload"]["alert"]),
            from_email="[email protected]",
            subject=subject
        )

    return jsonify({'success': True})


@app.route('/message/validate', methods=['GET'])
def validate():
    return jsonify(
        {'confirmation_code': VALIDATION_CODE}
    )

if __name__ == '__main__':
    app.run(port='8801')