Node.js http.IncomingMessage.statusCode用法及代碼示例

http.IncomingMessage.statusCode是HTTP模塊中IncomingMessage類的內置應用程序編程接口，用於獲取3位數的HTTP響應狀態代碼。

用法:

const message.statusCode

參數：此方法不接受任何參數作為參數。

返回值：此方法返回3位數字的HTTP響應狀態代碼。

範例1： 文件名：index.js

Javascript

// Node.js program to demonstrate the   
// request.statusCode 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 statusCode  
  // by using request.statusCode method 
  const value = request.statusCode; 
  console.log(value) 
  console.log(response.statusCode) 
  
  // Display result 
  response.end("statusCode:" + 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..."); 
});

使用以下命令運行index.js文件。

node index.js

輸出：

Server is running at port 3000...
null
200
displaying the result...
server is closed

現在，在瀏覽器中轉到http：//localhost：3000 /，您將看到以下輸出：

statusCode:null

範例2： 文件名：index.js

Javascript

// Node.js program to demonstrate the   
// request.statusCode method 
    
// Importing http module  
var http = require('http');  
  
// Request and response handler  
const http2Handlers = (request, response) => {  
    
  // Getting statusCode  
  // by using request.statusCode method 
  const value = request.statusCode; 
  
  var msg = ''
  
  if(!value) {  
    msg = 'Request statusCode Not Set'
  } else { 
    msg = 'Request statusCode Set'
  }  
    
  // Display result 
  response.end( msg , '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...");  
});

使用以下命令運行index.js文件。

node index.js

輸出：

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

現在，在瀏覽器中轉到http：//localhost：3000 /，您將看到以下輸出：

Request statusCode Not Set

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

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注：本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 Node.js http.IncomingMessage.statusCode Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。