Angular Socket.io不会传播/发出字符串
我将学习本教程: 直到最后一步,与其他用户通信时,一切都正常工作 这是我的index.js:Angular Socket.io不会传播/发出字符串,angular,express,socket.io,Angular,Express,Socket.io,我将学习本教程: 直到最后一步,与其他用户通信时,一切都正常工作 这是我的index.js: let express = require('express') let app = express(); let http = require('http'); let server = http.Server(app); let socketIO = require('socket.io'); let io = socketIO(server); const port = process.en
let express = require('express')
let app = express();
let http = require('http');
let server = http.Server(app);
let socketIO = require('socket.io');
let io = socketIO(server);
const port = process.env.PORT || 3000;
io.on('connection', (socket) => {
console.log('user connected');
socket.on('new-message', (message) => {
console.log(message);
io.emit(message);
});
});
server.listen(port, () => {
console.log(`started on port: ${port}`);
});
我故意将console.log留在那里,以查看消息是否仍在发送,它们确实在发送
然后,这是我的app.component.ts:
import { Component } from '@angular/core';
import { ChatService } from '../chat.service';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
message: string;
messages: string[] = [];
constructor(private chatService: ChatService) {
}
sendMessage() {
this.chatService.sendMessage(this.message);
this.message = '';
}
ngOnInit() {
console.log('Starting...');
this.chatService
.getMessages()
.subscribe((message: string) => {
console.log('message sent');
this.messages.push(message);
});
}
}
我得到控制台。记录“开始…”;但它从未到达控制台;控制台中的一部分
以下是chat.service.ts:
import * as io from 'socket.io-client';
import { Observable } from 'rxjs';
export class ChatService {
private url = 'http://localhost:3000';
private socket;
constructor() {
this.socket = io(this.url);
}
public sendMessage(message) {
this.socket.emit('new-message', message);
}
public getMessages = () => {
return Observable.create((observer) => {
this.socket.on('new-message', (message) => {
observer.next(message);
});
});
}
}
我看这里没有什么问题。任何帮助都将不胜感激。出现问题的是服务器中的io.emit。您只传入消息,但io.emit的第一个参数是事件。只需添加“new-message”作为第一个参数,消息就会到达您的客户端套接字
socket.on('new-message', (message) => {
console.log(message);
io.emit('new-message', message);
});