/** * Copyright (c) 2015-present, Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD-style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. * * @providesModule HMRClient * @flow */ 'use strict'; const Platform = require('Platform'); const invariant = require('fbjs/lib/invariant'); /** * HMR Client that receives from the server HMR updates and propagates them * runtime to reflects those changes. */ const HMRClient = { enable(platform: string, bundleEntry: string, host: string, port: number) { invariant(platform, 'Missing required parameter `platform`'); invariant(bundleEntry, 'Missing required paramenter `bundleEntry`'); invariant(host, 'Missing required paramenter `host`'); // need to require WebSocket inside of `enable` function because // this module is defined as a `polyfillGlobal`. // See `InitializeJavascriptAppEngine.js` const WebSocket = require('WebSocket'); const wsHostPort = port !== null && port !== '' ? `${host}:${port}` : host; // Build the websocket url const wsUrl = `ws://${wsHostPort}/hot?` + `platform=${platform}&` + `bundleEntry=${bundleEntry.replace('.bundle', '.js')}`; const activeWS = new WebSocket(wsUrl); activeWS.onerror = (e) => { let error = ( `Hot loading isn't working because it cannot connect to the development server. Try the following to fix the issue: - Ensure that the packager server is running and available on the same network` ); if (Platform.OS === 'ios') { error += ( ` - Ensure that the Packager server URL is correctly set in AppDelegate` ); } else { error += ( ` - Ensure that your device/emulator is connected to your machine and has USB debugging enabled - run 'adb devices' to see a list of connected devices - If you're on a physical device connected to the same machine, run 'adb reverse tcp:8081 tcp:8081' to forward requests from your device - If your device is on the same Wi-Fi network, set 'Debug server host & port for device' in 'Dev settings' to your machine's IP address and the port of the local dev server - e.g. 10.0.1.1:8081` ); } error += ( ` URL: ${host}:${port} Error: ${e.message}` ); throw new Error(error); }; activeWS.onmessage = ({data}) => { // Moving to top gives errors due to NativeModules not being initialized const HMRLoadingView = require('HMRLoadingView'); data = JSON.parse(data); switch (data.type) { case 'update-start': { HMRLoadingView.showMessage('Hot Loading...'); break; } case 'update': { const { modules, sourceMappingURLs, sourceURLs, inverseDependencies, } = data.body; if (Platform.OS === 'ios') { const RCTRedBox = require('NativeModules').RedBox; RCTRedBox && RCTRedBox.dismiss && RCTRedBox.dismiss(); } else { const RCTExceptionsManager = require('NativeModules').ExceptionsManager; RCTExceptionsManager && RCTExceptionsManager.dismissRedbox && RCTExceptionsManager.dismissRedbox(); } let serverHost; if (Platform.OS === 'android') { serverHost = require('NativeModules').AndroidConstants.ServerHost; } else { serverHost = port ? `${host}:${port}` : host; } modules.forEach(({id, code}, i) => { code = code + '\n\n' + sourceMappingURLs[i]; require('SourceMapsCache').fetch({ text: code, url: `http://${serverHost}${sourceURLs[i]}`, sourceMappingURL: sourceMappingURLs[i], }); // on JSC we need to inject from native for sourcemaps to work // (Safari doesn't support `sourceMappingURL` nor any variant when // evaluating code) but on Chrome we can simply use eval const injectFunction = typeof global.nativeInjectHMRUpdate === 'function' ? global.nativeInjectHMRUpdate : eval; code = [ `__accept(`, `${id},`, `function(global,require,module,exports){`, `${code}`, '\n},', `${JSON.stringify(inverseDependencies)}`, `);`, ].join(''); injectFunction(code, sourceURLs[i]); }); HMRLoadingView.hide(); break; } case 'update-done': { HMRLoadingView.hide(); break; } case 'error': { HMRLoadingView.hide(); throw new Error(data.body.type + ' ' + data.body.description); } default: { throw new Error(`Unexpected message: ${data}`); } } }; }, }; module.exports = HMRClient;