react-native/Libraries/Utilities/HMRClient.js

144 lines
4.5 KiB
JavaScript

/**
* 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: ${e.message}`
);
throw new Error(error);
};
activeWS.onmessage = ({data}) => {
// Moving to top gives errors due to NativeModules not being initialized
const HMRLoadingView = require('HMRLoadingView');
data = JSON.parse(data);
switch (data.type) {
case 'update-start': {
HMRLoadingView.showMessage('Hot Loading...');
break;
}
case 'update': {
const {
modules,
sourceMappingURLs,
sourceURLs,
inverseDependencies,
} = data.body;
if (Platform.OS === 'ios') {
const RCTRedBox = require('NativeModules').RedBox;
RCTRedBox && RCTRedBox.dismiss && RCTRedBox.dismiss();
} else {
const RCTExceptionsManager = require('NativeModules').ExceptionsManager;
RCTExceptionsManager && RCTExceptionsManager.dismissRedbox && RCTExceptionsManager.dismissRedbox();
}
modules.forEach(({id, code}, i) => {
code = code + '\n\n' + sourceMappingURLs[i];
// on JSC we need to inject from native for sourcemaps to work
// (Safari doesn't support `sourceMappingURL` nor any variant when
// evaluating code) but on Chrome we can simply use eval
const injectFunction = typeof global.nativeInjectHMRUpdate === 'function'
? global.nativeInjectHMRUpdate
: eval;
code = [
`__accept(`,
`${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;