Node.js socket.ref()方法
socket.ref() 方法是 dgram 模块内 socket 类的内置应用编程接口，用于获取包含其中所有信息的特定 Socket 的引用。
语法:
const socket.ref()
参数:此方法不接受任何参数。
返回值:这个方法返回包含所有信息的特定套接字的引用。
示例 1: 文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// server.ref() method
// Importing dgram module
var dgram = require('dgram');
// Creating and initializing client
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");
// Catching the message event
server.on("message", function (msg) {
// Displaying the client message
process.stdout.write("UDP String: " + msg + "\n");
// Exiting process
process.exit();
})
// Binding server with port
.bind(1234, () => {
// Getting the reference of the server
// by using ref() method
const size = server.ref();
// Display the result
console.log(size.eventNames());
});
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");
输出:
[ 'message' ]
UDP String: Hello
示例 2: 文件名:index . js
JavaScript
// Node.js program to demonstrate the
// server.ref() method
// Importing dgram module
var dgram = require('dgram');
// Creating and initializing client
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");
// Catching the message event
server.on("message", function (msg) {
// Displaying the client message
process.stdout.write("UDP String: " + msg + "\n");
// Exiting process
process.exit();
});
// Catching the listening event
server.on('listening', ()=> {
// Getting address information
// for the server
const address = server.address();
// display the result
console.log(`server listening
${address.address}: $ { address.port }`);
});
// Binding server with port address
// by using bind() method
server.bind(1234, ()=> {
// Getting the reference of server
// by using ref() method
const size = server.ref();
// Display the result
console.log(size.eventNames());
});
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");
输出:
server listening 0.0.0.0:1234
[ 'message', 'listening' ]
UDP String: Hello
使用以下命令运行 index.js 文件:
node index.js
参考:https:https://nodejs . org/dist/latest-v 12 . x/docs/API/dgram . html # dgram _ socket _ ref
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