79 lines
1.9 KiB
JavaScript
79 lines
1.9 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @format
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* @flow
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*/
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'use strict';
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import type {Server as HTTPServer} from 'http';
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import type {Server as HTTPSServer} from 'https';
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type WebsocketServiceInterface<T> = {
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+onClientConnect: (
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url: string,
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sendFn: (data: string) => mixed,
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) => Promise<T>,
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+onClientDisconnect?: (client: T) => mixed,
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+onClientError?: (client: T, e: Error) => mixed,
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+onClientMessage?: (client: T, message: string) => mixed,
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};
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type HMROptions<TClient> = {
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httpServer: HTTPServer | HTTPSServer,
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websocketServer: WebsocketServiceInterface<TClient>,
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path: string,
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};
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/**
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* Attaches a WebSocket based connection to the Packager to expose
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* Hot Module Replacement updates to the simulator.
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*/
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function attachWebsocketServer<TClient: Object>({
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httpServer,
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websocketServer,
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path,
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}: HMROptions<TClient>) {
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const WebSocketServer = require('ws').Server;
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const wss = new WebSocketServer({
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server: httpServer,
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path: path,
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});
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wss.on('connection', async ws => {
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let connected = true;
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const url = ws.upgradeReq.url;
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const sendFn = (...args) => {
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if (connected) {
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ws.send(...args);
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}
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};
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const client = await websocketServer.onClientConnect(url, sendFn);
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ws.on('error', e => {
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websocketServer.onClientError && websocketServer.onClientError(client, e);
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});
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ws.on('close', () => {
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websocketServer.onClientDisconnect &&
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websocketServer.onClientDisconnect(client);
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connected = false;
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});
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ws.on('message', message => {
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websocketServer.onClientMessage &&
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websocketServer.onClientMessage(client, message);
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});
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});
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}
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module.exports = attachWebsocketServer;
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