Remove duplicated attachWebsocketServer module

Reviewed By: jeanlauliac

Differential Revision: D8248752

fbshipit-source-id: b829de4b0d75d154dd80196b589fe70b0050be4d

local-cli/server/runServer.js

@@ -18,7 +18,7 @@ const HmrServer = require('metro/src/HmrServer');
 
 const {Terminal} = require('metro-core');
 
-const attachWebsocketServer = require('./util/attachWebsocketServer');
+const attachWebsocketServer = require('metro/src/lib/attachWebsocketServer');
 const compression = require('compression');
 const connect = require('connect');
 const copyToClipBoardMiddleware = require('./middleware/copyToClipBoardMiddleware');

local-cli/server/util/attachWebsocketServer.js

@@ -1,76 +0,0 @@
-/**
- * Copyright (c) 2015-present, Facebook, Inc.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @format
- * @flow
- */
-
-'use strict';
-
-import type {Server as HTTPServer} from 'http';
-import type {Server as HTTPSServer} from 'https';
-
-type WebsocketServiceInterface<T> = {
-  +onClientConnect: (
-    url: string,
-    sendFn: (data: string) => mixed,
-  ) => Promise<T>,
-  +onClientDisconnect?: (client: T) => mixed,
-  +onClientError?: (client: T, e: Error) => mixed,
-  +onClientMessage?: (client: T, message: string) => mixed,
-};
-
-type HMROptions<TClient> = {
-  httpServer: HTTPServer | HTTPSServer,
-  websocketServer: WebsocketServiceInterface<TClient>,
-  path: string,
-};
-
-/**
- * Attaches a WebSocket based connection to the Packager to expose
- * Hot Module Replacement updates to the simulator.
- */
-function attachWebsocketServer<TClient: Object>({
-  httpServer,
-  websocketServer,
-  path,
-}: HMROptions<TClient>) {
-  const WebSocketServer = require('ws').Server;
-  const wss = new WebSocketServer({
-    server: httpServer,
-    path: path,
-  });
-
-  wss.on('connection', async ws => {
-    let connected = true;
-    const url = ws.upgradeReq.url;
-
-    const sendFn = (...args) => {
-      if (connected) {
-        ws.send(...args);
-      }
-    };
-
-    const client = await websocketServer.onClientConnect(url, sendFn);
-
-    ws.on('error', e => {
-      websocketServer.onClientError && websocketServer.onClientError(client, e);
-    });
-
-    ws.on('close', () => {
-      websocketServer.onClientDisconnect &&
-        websocketServer.onClientDisconnect(client);
-      connected = false;
-    });
-
-    ws.on('message', message => {
-      websocketServer.onClientMessage &&
-        websocketServer.onClientMessage(client, message);
-    });
-  });
-}
-
-module.exports = attachWebsocketServer;