gulp-server-io/src/lib/server/socket.js

A local static server, plus livereload and a socket.io debugger for your SPA development with gulp

/**
 * Socket server generator
 */
const socketIO = require('socket.io');
// Export
/**
 * @param {object} server express server instance
 * @param {object} config full config options
 * @return {object} io instance
 */
module.exports = (server, config) => {
  if (!config.socket.enable) {
    return null;
  }

  // Logger = logger || logutil; should not provide anything here!
  let socketConfig = null;
  // Force the socket.io server to use websocket protocol only
  if (config.socket.socketOnly) {
    socketConfig =
      config.socket.transportConfig && Array.isArray(config.socket.transportConfig)
        ? config.socket.transportConfig
        : ['websocket'];
  }

  // Need to take this constructor out and re-use with the reload
  const io = socketIO(server, socketConfig);
  // Export it again
  return io;
};