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Node.js http.IncomingMessage.headers用法及代码示例


http.IncomingMessage.headers是HTTP模块中IncomingMessage类的内置应用程序编程接口,用于获取所有请求/响应标头对象。

用法:

const message.headers

参数:此方法不接受任何参数作为参数。

返回值:此方法返回所有请求/响应标头对象。

范例1:



文件名:index.js

Javascript

// Node.js program to demonstrate the   
// request.headers method  
  
// 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 request/reponse header 
  // by using request.complete method 
  const value = request.headers; 
  
  // Display header 
  console.log(value.connection) 
  
  // Display result 
  response.end("hello world", 'utf8', () => { 
    console.log("displaying the result..."); 
  
    httpServer.close(() => { 
      console.log("server is closed") 
    }) 
  }); 
}); 
  
// Listening to http Server  
httpServer.listen(PORT, () => { 
  console.log("Server is running at port 3000..."); 
});

使用以下命令运行index.js文件。

node index.js

输出:

Output:In-Console
Server is running at port 3000...
keep-alive
displaying the result...

现在,在浏览器中转到http://localhost:3000 /,您将看到以下输出:

hello world

范例2:

文件名:index.js

Javascript

// Node.js program to demonstrate the   
// request.headers Method  
  
// Importing http module  
var http = require('http'); 
  
// Request and response handler  
const http2Handlers = (request, response) => { 
  
  // Getting request/reponse header 
  // by using request.complete method 
  const value = request.headers; 
  
  // Display header 
  console.log(value.host) 
  
  // Display result 
  response.end("hello world!!", 'utf8', () => { 
    console.log("displaying the result..."); 
  
    httpServer.close(() => { 
      console.log("server is closed") 
    }) 
  }); 
}; 
  
// Creating http Server  
var httpServer = http.createServer( 
  http2Handlers).listen(3000, () => { 
  console.log("Server is running at port 3000..."); 
});

使用以下命令运行index.js文件。

node index.js

输出:

Server is running at port 3000...
localhost:3000
displaying the result...

现在,在浏览器中转到http://localhost:3000 /,您将看到以下输出:

hello world!!

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

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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.IncomingMessage.headers 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。