Hippy/framework/js/packages/hippy-debug-server/webpack-dev-server/client-src/clients/SockJSClient.js

import SockJS from '../modules/sockjs-client/index';
import { log } from '../utils/log';

export default class SockJSClient {
  constructor(url) {
    // SockJS requires `http` and `https` protocols
    this.sock = new SockJS(url.replace(/^ws:/i, 'http:').replace(/^wss:/i, 'https:'));
    this.sock.onerror = (error) => {
      log.error(error);
    };
  }

  onOpen(f) {
    this.sock.onopen = f;
  }

  onClose(f) {
    this.sock.onclose = f;
  }

  // call f with the message string as the first argument
  onMessage(f) {
    this.sock.onmessage = (e) => {
      f(e.data);
    };
  }
}