无法使用 @stomp/stompjs 订阅主题 [英] Unable to subscribe on topic using @stomp/stompjs

问题描述

这是我的 React 组件的一部分:

Here is a part of my React component:

import React from 'react';
import { Client } from '@stomp/stompjs';

class Balance extends React.Component {

    componentDidMount() {
        const client = new Client({
            brokerURL: 'ws://localhost:8080/stomp',
            debug: (str) => {
                console.log(str);
            },
        });

        client.onConnect(() => {
            console.log('onConnect');
            client.subscribe('/topic/balance', message => {
                console.log(message);
            })
        });

        client.activate();
    }
...

根据浏览器控制台的调试输出，连接似乎已建立:

It looks like connection was established according to the debug output to browser's console:

Opening Web Socket...
Web Socket Opened...
>>> CONNECT
accept-version:1.0,1.1,1.2
heart-beat:10000,10000
Received data
<<< CONNECTED
heart-beat:0,0
version:1.2
content-length:0
connected to server undefined

但是，我在控制台中没有看到onConnect"消息，这意味着 client.onConnect 从未被触发.

However, I don't see a message 'onConnect' in console, which means client.onConnect was never fired.

因此我无法订阅主题.

这里可能有什么问题?

更新:

推荐答案

根据 编写它是库语法的混淆.

我的问题中更正后的代码如下所示:

The corrected code from my question look as the following:

import React from 'react';
import { Client } from '@stomp/stompjs';

class Balance extends React.Component {
  componentDidMount() {
    // The compat mode syntax is totally different, converting to v5 syntax
    // Client is imported from '@stomp/stompjs'
    this.client = new Client();

    this.client.configure({
      brokerURL: 'ws://localhost:8080/stomp',
      onConnect: () => {
        console.log('onConnect');

        client.subscribe('/topic/balance', message => {
            console.log(message);
        })
      },
      // Helps during debugging, remove in production
      debug: (str) => {
        console.log(new Date(), str);
      }
    });

    this.client.activate();
  }
...

我在我的 repo 中创建了一个完整的工作示例.

I created a full working example in my repo.

这篇关于无法使用 @stomp/stompjs 订阅主题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！