Node.js http.ClientRequest.setSocketKeepAlive()用法及代码示例

http.ClientRequest.setSocketKeepAlive()是HTTP模块中的ClientRequest类的内置应用程序编程接口，用于启用/禁用TCP /IP套接字保持活动状态。

用法:

const request.setSocketKeepAlive([enable][, initialDelay])

参数：此方法采用以下两个参数：

enable:布尔值指示是否保持套接字活动。
initialDelay:它是一个可选参数，是以毫秒为单位的延迟值。

返回值：此方法无返回值。

范例1：Filename-index.js

Javascript

// Node.js program to demonstrate the   
// request.setSocketKeepAlive() method 
  
// Importing http module 
const http = require('http'); 
  
// Create an HTTP server 
const server = http.createServer((req, res) => { 
    res.writeHead(200, { 'Content-Type':'text/plain' }); 
    res.end('okay'); 
}); 
  
// Now that server is running 
server.listen(3000, '127.0.0.1', () => { 
  
    // Make a request 
    const options = { 
        port:3000, 
        host:'127.0.0.1', 
        headers:{ 
            'Connection':'Upgrade', 
            'Upgrade':'websocket'
        } 
    }; 
  
    // Getting clinet request 
    const req = http.request(options); 
  
    req.host = '127.0.0.1'
  
    // Setting the keep alive for the socket 
    // by using setSocketKeepAlive method 
    req.setSocketKeepAlive(true); 
  
    // Display the result 
    console.log("keep alive is enabled for the socket") 
  
    process.exit(0) 
});

使用以下命令运行index.js文件：

node index.js

输出：

keep alive is enabled for the socket

示例2：Filename-index.js

Javascript

// Node.js program to demonstrate the   
// request.setSocketKeepAlive() method 
  
// Importing http module 
const http = require('http'); 
  
// Create an HTTP server 
http.createServer((req, res) => { }).listen(3000, '127.0.0.1', () => { 
  
    // Getting clinet request 
    const req = http.request({ 
        port:3000, 
        host:'127.0.0.1', 
    }); 
  
    // Setting the keep alive for the socket 
    // by using setSocketKeepAlive method 
    req.setSocketKeepAlive(true); 
  
    // Display the result 
    console.log("keep alive is enabled for the socket") 
  
    process.exit(0) 
});

使用以下命令运行index.js文件：

node index.js

输出：

keep alive is enabled for the socket

参考：

https://nodejs.org/dist/latest-v12.x/docs/api/http.html#http_request_setsocketkeepalive_enable_initialdelay

相关用法

注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 Node.js http.ClientRequest.setSocketKeepAlive() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。