Trigger DBus Desktop Notifications via WebSocket/WAMP

This example shows how to bridge WebSocket/WAMP and DBus.

The example allows to trigger Linux desktop notifications on one or multiple machines from a browser based UI running anywhere via a WebSocket/WAMP PubSub message broker in between.

For DBus support, we will use txdbus, a new native Python DBus binding for Twisted which does not depend on the glib reactor or libdbus Python bindings.

The example consists of 3 parts:

• client.py
• server.py
• index.html

The client.py runs on a Linux desktop and subscribes to 2 PubSub topics:

• user specific topic
• the "all" topic (for notifications to all)

Upon receiving an event over WAMP for one of above topics, a desktop notification is triggered via txdbus.

The server.py runs on an arbitrary machine and provides the PubSub message brokering. It also provides an embedded web server for the Web UI.

The index.html is the Web UI used to trigger desktop notifications. It is a WAMP client using AutobahnJS and publishes notification events to topics for the server.py to forward to connected Linux desktops.

Running

Run the server by doing

python server.py debug

and open

http://<Server IP>:8080/

in your browser.

Open a terminal on a Linux desktop and

python client.py ws://<Server IP>:9000 user1 secret

Optionally, open a second terminal on another Linux desktop and

python client.py ws://<Server IP>:9000 user2 geheim

Now, from the Web UI, send desktop notifications to

• all
• user1
• user2