连接到 netty-socket.io 服务器时的角度客户端“服务器错误”

如何解决连接到 netty-socket.io 服务器时的角度客户端“服务器错误”

我正在尝试将我的 Angular 应用程序连接到基于 netty-socket.io 的 java 套接字服务器，但它不起作用......

我总是在“connect_error”上收到此错误：

Error: server error
    at Socket.onPacket (socket.js:393)
    at XHR.Emitter.emit (index.js:145)
    at XHR.onPacket (transport.js:105)
    at callback (polling.js:98)
    at Array.forEach (<anonymous>)
    at XHR.onData (polling.js:102)
    at Request.Emitter.emit (index.js:145)
    at Request.onData (polling-xhr.js:231)
    at Request.onLoad (polling-xhr.js:282)
    at XMLHttpRequest.xhr.onreadystatechange [as __zone_symbol__ON_PROPERTYreadystatechange] (polling-xhr.js:186)

我已经在尝试使用 socket.io-client 和 ngx-socket-io。

服务器端：

public static void main(String[] args) throws InterruptedException {

        Configuration config = new Configuration();
        config.setHostname("localhost");
        config.setPort(4000);
        config.setorigin("*");

        final SocketIOServer server = new SocketIOServer(config);

        server.addConnectListener(new ConnectListener() {
            @Override
            public void onConnect(SocketIOClient client) {
                System.out.println(client.toString());
                client.sendEvent("start","work";
            }
        });
        server.addEventListener("new-msg",String.class,new DataListener<String>() {
            @Override
            public void onData(SocketIOClient client,String data,AckRequest ackSender) throws Exception {
                System.out.println(data);
            }
        });

        server.start();
    }

客户端socket.io-client：

app.component.ts

constructor() {
    this.socket = io('http://localhost:4000');

    this.socket.on('connection',function () {
      console.log('client connected');
    });

    this.socket.on('connect_error',function(err) {
        console.log("client connect_error: ",err);
    });

    this.socket.on('start',(message) => {
      console.log(message);
    });

    this.socket.emit('new-msg','This is a new message');

ngx-socket-io 的客户端：

app.module.ts

import { NgModule } from '@angular/core';
import { browserModule } from '@angular/platform-browser';
import { SocketIoModule } from 'ngx-socket-io';
import { AppComponent } from './app.component';

@NgModule({
  declarations: [AppComponent],imports: [
    browserModule,SocketIoModule.forRoot({
      url: 'http://localhost:4000',options: {
      },}),],providers: [],bootstrap: [AppComponent],})
export class AppModule {}

app.component.ts

import { Component } from '@angular/core';
import { Socket } from 'ngx-socket-io';

@Component({
  selector: 'socket-fun-root',templateUrl: './app.component.html',styleUrls: ['./app.component.scss'],})
export class AppComponent {
  serverIsReady = this.socket.fromEvent<string>('start').subscribe((msg) => {
    console.log(msg);
  });

  constructor(private socket: Socket) {
    this.socket.on('connect_error',(e: any) => {
      console.log('client connect_error: ',e);
    });

    this.socket.on('connection',() => {
      console.log('client connected');
    });

    this.socket.emit('new-msg','This is a new message');
  }