react-native-signalr/src/index.js

Connect to a SignalR server from react-native

let signalRHubConnectionFunc;

const makeSureDocument = () => {
  const originalDocument = window.document;
  window.document = window.document || { readyState: "complete" };
  if (!window.document.readyState) {
    window.document.readyState = "complete";
  }
  return () => (window.document = originalDocument);
};

if (!window.addEventListener) {
  window.addEventListener = window.addEventListener = () => {};
}
window.navigator.userAgent = window.navigator.userAgent || "react-native";
window.jQuery = require("./signalr-jquery-polyfill.js").default;

export default {
  setLogger: logger => {
    if (window.console && window.console.debug) {
      window.console.debug("OVERWRITING CONSOLE.DEBUG in react-native-signalr");
    } else if (!window.console) {
      window.console = {};
    }
    const originalDebug = window.console.debug;
    window.console.debug = logger;
    return () => (window.console.debug = originalDebug);
  },
  hubConnection: (serverUrl, options) => {
    const revertDocument = makeSureDocument();
    if (!signalRHubConnectionFunc) {
      require("ms-signalr-client");
      signalRHubConnectionFunc = window.jQuery.hubConnection;
    }
    const [protocol, host] = serverUrl.split(/\/\/|\//);
    if (options && options.headers) {
      window.jQuery.defaultAjaxHeaders = options.headers;
    }
    const hubConnectionFunc = signalRHubConnectionFunc(serverUrl, options);
    const originalStart = hubConnectionFunc.start;
    revertDocument();

    hubConnectionFunc.start = (options, ...args) => {
      const revertDocument = makeSureDocument();
      window.document.createElement = () => {
        return {
          protocol,
          host,
        };
      };
      window.location = {
        protocol,
        host,
      };
      const returnValue = originalStart.call(hubConnectionFunc, options, ...args);
      revertDocument();
      return returnValue;
    };

    return hubConnectionFunc;
  },
};