如何在node.js中使用socket.io? [英] How to use socket.io in angular with node.js?

问题描述

客户端使用Angular 6，服务器端使用node.js.

Clientside I used Angular 6 and Serverside i used node.js.

在angular 6控制台中，它会打印消息并 socket.io id({message: "Hello World", id: "6An-ctwlwbZZWrfMAAAB"}) 使用下面的代码后.

Here in angular 6 console it print message and socket.io id({message: "Hello World", id: "6An-ctwlwbZZWrfMAAAB"}) after using below code.

此代码正确或此代码中的任何更改bcoz我不确定此代码是否有助于纠正此错误.

this code is right or any change in this code bcoz I am not sure about this code kindly help to make correct this.

另一个查询是我的项目中有15个以上的组件，因此如何将该socket.io通用用于所有组件，或者我必须将此app.component.ts代码导入所有其他组件中.

and another query is I have more than 15 components in my project so how to make common use this socket.io for all components or I have to import this app.component.ts code in all another component.

app.js(服务器端)

app.js(serverside)

after installing (npm i socket.io)

const express = require('express');
var app = express();
const http = require('http');
const socketIo = require('socket.io');
const server = http.Server(app);
const io = socketIo(server);

server.listen(3000,function(req,res){
  console.log("listen at 3000!");
});

io.on('connection',(socket) => {
  socket.emit('hello',{
    message : 'Hello World',id: socket.id
  })
});

app.component.ts(客户端)

app.component.ts(clientside)

after installing (npm i socket.io)

import * as socketIo from 'socket.io-client';

export class AppComponent implements OnInit {
  ngOnInit(){
    const socket = socketIo('http://localhost:3000/');
      socket.on('hello',(data) => console.log(data));
    }
  }
}

推荐答案

实现此机制的一种方法是使用ngx-socket-io，在模块级别或根级别上连接节点服务器，我已经在下面实现了

app.module.ts代码

The one way to achieve this mechanism is using ngx-socket-io, connect your node server at the module level or root level i have implemented like below

app.module.ts code

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { SocketIoModule, SocketIoConfig } from 'ngx-socket-io';
import { AppComponent } from './app.component';
const config: SocketIoConfig = { url: 'http://192.168.1.187:9301', options: {}  };
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    SocketIoModule.forRoot(config),
    FormsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

创建一项处理您的传入和传出流量的服务.

create one service which handles your incoming and outgoing traffic.

import { Injectable } from '@angular/core';
import { Socket } from 'ngx-socket-io';
@Injectable({
  providedIn: 'root'
})
export class SocketService {

  constructor(public socket: Socket) { }
  getMessage() {
    return this.socket
        .fromEvent<any>('msg')
        .map(data => data.msg);
}

sendMessage(msg: string) {
    this.socket.emit('msg', msg);
}
}

更新您组件文件中的代码

Update your code in your component file

export class AppComponent implements OnInit {
  constructor(private socketService: SocketService) {}
  title = 'app';
  incomingmsg = [];
  msg = 'First Protocol';
  ngOnInit() {
    this.socketService
        .getMessage()
        .subscribe(msg => {
          console.log('Incoming msg', msg);
        });
        this.sendMsg(this.msg);
  }
  sendMsg(msg) {
    console.log('sdsd', msg);
    this.socketService.sendMessage(msg);
 }
}

这篇关于如何在node.js中使用socket.io?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！