Node.js http.server.maxHeadersCount用法及代码示例

http.server.maxHeadersCount是HTTP模块中Server类的内置应用程序编程接口，用于获取最大传入报头数。

用法:

const server.maxHeadersCount

参数：此属性不接受任何参数作为参数。

返回值：它不返回任何值。

范例1：Filename-index.js

Javascript

// Node.js program to demonstrate the   
// server.maxHeadersCount property 
  
// Importing http module  
var http = require('http'); 
  
// Setting up PORT  
const PORT = process.env.PORT || 3000; 
  
// Creating http Server  
var httpServer = http.createServer( 
    function (request, response) { 
  
    // Getting the reference of the  
    // underlying socket object 
    // by using socket method 
    const value = response.socket; 
  
    // Display result by using end() method 
    response.end("socket buffersize:" 
        + value.bufferSize, 'utf8', () => { 
            console.log("displaying the result..."); 
  
            // Closing server  
            // by using close() method 
            httpServer.close(() => { 
                console.log("server is closed") 
            }) 
    }); 
}); 
  
// Listening to http Server  
// by using listen() method 
httpServer.listen(PORT, () => { 
    console.log("Server is running at port 3000..."); 
}); 
  
// Getting max header count  
// by using maxHeadersCount method 
const v = httpServer.maxHeadersCount 
  
// Display the result 
console.log('maximum header count:-' + v)

使用以下命令运行index.js文件：

node index.js

输出：

maximum header count:-null
Server is running at port 3000...
displaying the result...
server is closed

现在在浏览器中运行http：//localhost：3000 /，您将在屏幕上看到以下输出：

socket buffersize:0

示例2：Filename-index.js

Javascript

// Node.js program to demonstrate the   
// server.maxHeadersCount method 
  
// Importing http module  
var http = require('http'); 
  
// Request and response handler  
const http2Handlers = (request, response) => { 
  
    // Getting the reference of the  
    // underlying socket object 
    // by using socket method 
    const value = response.socket; 
  
    // Display result by using end() method 
    response.end("socket local address:"
        + value.localAddress, 'utf8', () => { 
            console.log("displaying the result..."); 
  
            // Closing server  
            // by using close() method 
            httpServer.close(() => { 
                console.log("server is closed") 
            }) 
        }); 
}; 
  
// Listening to http Server  
// by using listen() method 
var httpServer = http.createServer( 
    http2Handlers).listen(3000, () => { 
    console.log("Server is running at port 3000..."); 
}); 
  
// Getting max header count  
// by using maxHeadersCount method 
const v = httpServer.maxHeadersCount 
  
if (v || v > 1) { 
    console.log("maximum header count is greater than 1") 
} else { 
    console.log("maximum header count is less than 1") 
}

使用以下命令运行index.js文件：

node index.js

输出：

maximum header count is less than 1
Server is running at port 3000...
displaying the result...
server is closed

现在在浏览器中运行http：//localhost：3000 /，您将在屏幕上看到以下输出：

socket local address:::1

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

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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.server.maxHeadersCount Property。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。