同域名不同端口跨域

const express = require('express');
const cors = require('cors');
const app = express();

app.use(cors());

app.get('/data', (req, res) => {
  res.json({ message: 'This is data from port 8080' });
});

app.listen(8080, () => {
  console.log('Server running on port 8080');
});

// vue.config.js
module.exports = {
  devServer: {
    proxy: {
      '/api': {
        target: 'http://example.com:8080',
        changeOrigin: true,
        pathRewrite: { '^/api': '' }
      }
    }
  }
};

const socket = new WebSocket('ws://example.com:8080');

socket.onopen = () => {
  socket.send('Hello Server!');
};

socket.onmessage = (event) => {
  console.log('Message from server:', event.data);
};