happn-3/lib/services/connect/middleware/system.js

pub/sub api as a service using primus and mongo & redis or nedb, can work as cluster, single process or embedded using nedb

module.exports = SystemMiddleware;

SystemMiddleware.prototype.initialize = initialize;
SystemMiddleware.prototype.process = _process;

function SystemMiddleware() {}

function initialize() {
  this.happn.log('system middleware loaded');
}

function _process(req, res, next) {
  if (req.url && req.url.toLowerCase() === '/version') {
    res.setHeader('Content-Type', 'application/json');
    return res.end(
      JSON.stringify({
        version: require('../../../../package.json').version,
      })
    );
  }

  if (req.url && req.url.toLowerCase() === '/ping') {
    res.setHeader('Content-Type', 'text/plain');
    return res.end('pong');
  }

  return next();
}