node.js 实现udp传输的实例代码

服务端 server.js

const dgram = require("dgram");
const server = dgram.createSocket('udp4');

server.on('error', (err) => {
    console.log(`server error:\n${err.stack}`);
    server.close();
});

server.on('message', (msg, rinfo) => {
    console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
});

server.on('listening', () => {
    const address = server.address();
    console.log(`server listening ${address.address}:${address.port}`);
});

server.bind(41234);
// Prints: server listening 0.0.0.0:41234

客户端client.js

const dgram = require("dgram");
const client = dgram.createSocket('udp4');

client.send('客户端发起的信息！', 41234, 'localhost', (err) => {
    client.close();
});

https://nodejs.org/api/dgram.html#event-close