Node.js http.ServerResponse.sendDate 方法

httpServerResponse.sendDate是http 模块中Server Response 类的内置应用程序编程接口，用于检查日期标头是否已发送。 HTTP 标头还用于传递附加信息，例如日期等。请参阅本文。

句法：

response.sendDate

参数：此方法不接受任何参数作为参数。

返回值：当且仅当日期标头已发送时，此方法才返回 true。

示例 1：文件名：index.js

Javascript

// Node.js program to demonstrate the  
// response.sendDate() APi
    
// 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){ 
  
  // Checking if date header has been
  // sent or not by using sendDate API
  const value = response.sendDate;
    
  // Display result
  // by using end() api
  response.end( "Date header status: " 
    + value, 'utf8', () => { 
      console.log("displaying the result..."); 
  
      // Closing the server
      httpServer.close(()=>{
          console.log("server is closed")
      })
  }); 
}); 
    
// Listening to http Server 
httpServer.listen(PORT, () => { 
    console.log("Server is running at port 3000..."); 
});

执行命令：

node index.js

控制台输出：

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

浏览器输出：粘贴本地主机地址 http://localhost:3000/。在浏览器的搜索栏中。

Date header status: true

示例 2：文件名：index.js

Javascript

// Node.js program to demonstrate the  
// response.sendDate() APi
    
// Importing http module 
var http = require('http'); 
  
// Request and response handler 
const http2Handlers = (request, response) => { 
    
  // Checking if date header has been
  // sent or not by using sendDate API
  const value = response.sendDate;
    
  // Display result by using end() api
  response.end( "Date header status: "
    + value, 'utf8', () => { 
      console.log("displaying the result..."); 
  
      // Closing the server
      httpServer.close(()=>{
          console.log("server is closed")
      })
  });
}; 
    
// Creating http Server and listening
// on the port 3000
var httpServer = http.createServer(
    http2Handlers).listen(3000, () => { 
    console.log("Server is running at port 3000..."); 
});

执行命令：

node index.js

控制台输出：

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

浏览器输出：粘贴本地主机地址 http://localhost:3000/。在浏览器的搜索栏中。

Date header status: true

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