使用inversify-express-utils，如何集成WebSocket？

Question

我们尝试通过websockets连接基于inversify-express-utils扩展我们的打字稿应用程序，但是到目前为止还没有运气：

import 'reflect-metadata';
import {interfaces, InversifyExpressServer, TYPE} from 'inversify-express-utils';
import { Kernel } from 'inversify';
import {UserController} from './controller/UserController';
import TYPES from './constant/types';
import * as socketIo from 'socket.io';

// set up kernel
let kernel = new Kernel();

// create server
let server = new InversifyExpressServer(kernel);
kernel.bind<interfaces.Controller>(TYPE.Controller).to(UserController).whenTargetNamed(TAGS.UserController);
server
  .build()
  .listen(3000, 'localhost', () => console.log('listening on http://localhost:3000'));

// try to setup a socket io based websocket
let io = socketIo(server);
io.on('connect', (socket) => console.log('"connect" executed'));
io.on('connection', (socket) => console.log('"connection" executed'));

服务器将通过ts-node server.ts 。 但是我无法连接到此网络套接字。 使用多种工具进行了尝试，例如Dark WebSocket Terminal chrome插件和执行\\connect localhost:3000 。 任何想法？

Answer 1

我前段时间也遇到过类似的问题。 这是为我工作的东西：

let server: interfaces.InversifyExpressServer = new InversifyExpressServer(kernel);

server.setConfig((app) => {
    ... 
    app.use(helmet());
    ...
});

let app = server.build();

let instance: any = app.listen(config.url.port);
console.log(`Server started on port ${config.url.port} :)`);


let socketIO = SocketIO.listen(instance);
socketIO.on('connection', (socket: SocketIO.Server) => {
    socket.emit('news', { hello: 'world' });
    socket.on('my other event', function (data: any) {
        console.log(data);
    });
});

exports = module.exports = app;

如您所见，您必须先创建一个正在运行的Express服务器实例，然后才能将Socket.IO附加到该实例上。 您的server变量还不够。 希望这对您有用。

最好的祝福
....西蒙

Answer 2

可以在https://github.com/dkellenb/inversify-express-utils-websockets上找到一个工作示例。问题是：

• 需要围绕应用创建服务器包装
• 侦听应在快递服务器上开始
• 测试连接字符串应如下所示：
  ws://localhost:3000/socket.io/?EIO=3&transport=websocket

程式码片段：

// server.build() actually returns an Express.Application instance
let app = server.build();

// socket.io expects an http.Server versus a InversifyExpressServer
// see http://socket.io/docs/#using-with-express-3/4
let httpServer = require('http').createServer(app);
httpServer.listen(3000);

// create socket.io
let io = socketIo(httpServer);

Answer 3

import * as express from 'express';
import * as expressWs from 'express-ws';
import { InversifyExpressServer } from 'inversify-express-utils';
import { container } from "./utils/InversifyConfig";

let inversifyExpressServer = new InversifyExpressServer(container);
  inversifyExpressServer.setConfig((app: expressWs.Application) => {
     expressWs(app);
     // Your other config
  });