Jeedom Websocket

Jeedom plugin to provide a reliable low latency bidirectional client-server communication over websocket protocol.

Events are pushed to clients avoiding long polling (Ajax request) overhead.

Reduce server load by sharing the Jeedom query and broadcast result to multiples clients.

Installation & configuration

• Install plugin:

  • Upload Websocket.zip file in the Jeedom plugin admin GUI,
  • Set plugin logical id: Websocket,
  • Save and refresh (F5).

• Tune plugin configuration (from plugin configuration GUI):

  • Websocket internal port: any available port (default 8090),
  • Period in seconds between events readings,
  • Period in seconds before closing an unauthenticated connection,
  • Allowed hosts (most important): comma-separated list of hosts which are allowed to connect to websocket, example: myjeedom.ltd,10.0.0.42 (default set to your internal and external Jeedom instance hosts).

• (Optional) proxying websocket port (8090) to regular http (80) / https (443) with Apache (require proxy_wstunnel module) by adding the following lines in /etc/apache2/sites-enabled/000-default.conf:

    <Location "/myawesomesocket">
            ProxyPass ws://localhost:8090
            ProxyPassReverse ws://localhost:8090
    </Location>
  

• Check daemon configuration:

  • Does webserver user is not www-data?
    • Change line User=www-data
  • Does jeedom path is not /var/www/html/?
    • Change line WorkingDirectory=/var/www/html/plugins/Websocket/core/php
  • Does PHP path is not /usr/bin/php?
    • Change line ExecStart=/usr/bin/php bin/server.php

Use

To get Jeedom events, client:

1. connect to websocket endpoint,
2. send user API key as soon as onopen event occurs,
3. do your useful stuffs with Jeedom events.

JavaScript example:

//1. connect
const websocket = new WebSocket('ws://10.0.0.42/myawesomesocket')

//2. send user credentials
websocket.onopen = (e) => {
  const authMsg = JSON.stringify({ apiKey: 'userApiKey' })
  websocket.send(authMsg)
}

//3. Handle events
websocket.onmessage = (e) => {
  //do stuff with Jeedom events (e.data.result)
}
websocket.onerror = (e) => {
  //handle error
}
websocket.onclose = (e) => {
  //handle connection closed
}

Credits

• Nioc - Initial work

See also the list of contributors to this project.

This project is powered by the following components:

• Ratchet (MIT)
• NextDom plugin-template (GPLv2)
• Jeedom (GPL)