iNPUTmice / lttrs-push-server

Ltt.rs Push Server

This server receives pushes (StateChanges and PushVerifications) from a JMAP server and forwards them to Ltt.rs for Android via Firebase Cloud Messaging.

Ltt.rs for Android will create a PushSubscription on the user’s JMAP server with the URL of this push server. (The official PlayStore distribution uses https://push.ltt.rs.)

This intermediate server (proxy) is required for two reasons:

• A JMAP server doesn’t know how to talk to Firebase.
• Only the app developer has the private keys to send push messages to the app.

The latter means that if you want to run your own push server you need to compile the app and sign up for Firebase Could Messaging. Likewise if you want to compile the playstore flavor of Ltt.rs for Android you need to set up your own push server.

Compile

./gradlew shadowJar

Run

java -jar build/libs/lttrs-push-server-0.1-all.jar -l 127.0.0.1 -p 1234 -s /path/to/service-accounts.json