Web push notification server

This script allows you to:

• Generate the necessary keys for webpush
• Expose the public key to the client
• Register and update user subscriptions.
• Send notifications to users by their number

Keys are randomly generated at startup or can be set using environment variables (PUSH_PUBLIC and PUSH_PRIVATE). The same for the express port (PUSH_PORT) and the secret key (PUSH_SECRET)

Methods

http://url:port/publicKey

Displays the public key needed for the webApp to generate its credentials

http://url:port/save

Creates or updates the user record in the database This method requires the following data:

{
    "user": "user number",
    "endpoint": "endpoint generate by the webapp subscription",
    "auth": "auth key generate by the webapp subscription",
    "p256dh": "p256dh generate my the webapp subrcription"
}

http://url:port/send

Send a push notification to the user. You need to have the secret key to enable sending. This method requires the following data:

{
    "user": "user number",
    "secretKey": "secret key set in the server",
    "payload": "data sent with the push message"
}