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

http.IncomingMessage.rawTrailers是HTTP模块中IncomingMessage类的内置应用程序编程接口，该接口用于获取原始请求/响应尾键和值，使其与接收到的键和值完全相同。

用法:

const message.rawTrailers

参数：此方法不接受任何参数作为参数。

返回值：此方法返回原始请求/响应尾部键和值，它们与接收到的键和值完全相同。

范例1： 文件名：index.js

Javascript

// Node.js program to demonstrate the   
// request.rawTrailers 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 rawTrailers by using 
  // request.rawTrailers method 
  const value = request.rawTrailers 
  console.log(value) 
  
  // Display result 
  response.end("rawTrailers", value, '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：

Server is running at port 3000...
[]
displaying the result...
server is closed

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

rawTrailers

范例2： 文件名：index.js

Javascript

// Node.js program to demonstrate the   
// request.rawTrailers method 
  
// Importing http module  
var http = require('http'); 
  
// Request and response handler  
const http2Handlers = (request, response) => { 
  
  // Getting rawTrailers  
  // by using request.rawTrailers method 
  const value = request.rawTrailers; 
   
  if(!value) console.log('No rawTrailers added') 
  
  // Display result 
  response.end("rawTrailers" + value, '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...
No rawTrailers added
displaying the result...
server is closed

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

rawTrailers

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

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.IncomingMessage.rawTrailers 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。