Node.js socket.getRecvBufferSize() 方法

socket.getRecvBufferSize() 是 dgram 模块中 Socket 类的内置应用程序编程接口，用于获取套接字接收缓冲区的大小（以字节为单位）。

句法：

const socket.getSendBufferSize()

参数：此方法不接受任何参数。

返回值：此方法返回套接字接收缓冲区的大小（以字节为单位）。

示例 1：文件名：index.js

Javascript

// Node.js program to demonstrate the
// server.getRecvBufferSize() 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 receive buffer size
  // by using getRecvBufferSize() method
  const size = server.getRecvBufferSize();
 
  // Display the result
  console.log(size);
 
});
 
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");

输出：

65536
UDP String: Hello

示例 2：文件名：index.js

Javascript

// Node.js program to demonstrate the
// server.getRecvBufferSize() 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 receive buffer size
  // by using getRecvBufferSize() method
  const size = server.getRecvBufferSize();
 
  // Display the result
  console.log(size);
});
 
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");

输出：

server listening 0.0.0.0:1234
65536
UDP String: Hello

使用以下命令运行 index.js 文件：

node index.js

参考： https ://nodejs.org/dist/latest-v12.x/docs/api/dgram.html#dgram_socket_getrecvbuffersize