Question

如何在不同的路线中收听事件？ This类似于我想要做的事情。例如：

import Koa from 'koa'
import serve from 'koa-static'
import Router from'koa-router'
import views from 'koa-views'
import socket from 'socket.io'
import http from 'http'
import config from'./config'

const app = new Koa()
const router = new Router()

const server = http.createServer(app.callback())
const io = new socket(server)

app.use(async function (ctx, next) {
  ctx.io = io
  await next()
})

const test1 = async(ctx, next) => {
  ctx.io.on('connection', (socket) => {
    console.log('a user connected - event 1')
    socket.on('disconnect', () => {
      console.log('user disconnected')
    })
    socket.on('Event1', (data) => {
      console.log('Event1')
    })
  })

  await ctx.render('test1', {});
}

const test2 = async(ctx, next) => {
  ctx.io.on('connection', (socket) => {
    console.log('a user connected - event 2')
    socket.on('disconnect', () => {
      console.log('user disconnected')
    })
    socket.on('Event2', (data) => {
      console.log('Event2')
    })
  })

  await ctx.render('test2', {});
}

router
  .get('/', function (ctx, next) {
    ctx.body = 'Hello World!';
  })
  .get('/test1', test1)
  .get('/test2', test2)

app.use(serve(config.static_dir.root))
app.use(views(__dirname + config.template.path, config.template.options))

app
  .use(router.routes())
  .use(router.allowedMethods())

server.listen(config.server.port)

他们的工作正常但有问题 - 当您刷新浏览器3次'/test1'时，io实例将重复，因此我会重复结果如下：

a user connected - event 1
a user connected - event 1
a user connected - event 1

我想我一定错过了什么或做错了。

有什么想法吗？

Answer 1

编辑：套接字中的命名空间可用于连接到/以外的其他路由。 https://socket.io/docs/rooms-and-namespaces/#custom-namespaces

示例：

io.of('/chat').on('connection', function(socket){
  console.log('someone connected');
});

将此代码移出聊天中间件。它应该只执行一次。只是把它放在功能旁边，它应该可以工作。

io.on('connection', (socket) => {
   console.log('a user connected')
   socket.on('disconnect', () => {
      console.log('user disconnected')
   })
   socket.on('chat.message', (msg) => {
      console.log('message: ' + msg)
      io.emit('chat.message', msg)
   })
});

要使套接字文件服务于与默认路由不同的路由，请在创建io实例时使用path config。

示例：

const io = new socket(server, { path: '/chat', serveClient: false });

此处有更多信息：https://socket.io/docs/server-api/#new-server-httpserver-options

Socket.io - 在不同的路线中监听事件？

1 个答案: