Node.js http.ServerResponse.writableFinished 属性

httpServerResponse.writableFinished是 http 模块中 ServerResponse 类的内置应用程序编程接口，用于检查所有数据是否已刷新。

句法：

response.writableFinished

参数：此属性不接受任何参数作为参数。

返回值：当且仅当所有数据都已刷新或未刷新时，此属性才返回 true。

示例 1：文件名：index.js

Javascript

// Node.js program to demonstrate the  
// response.writableFinished 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 all the data has been flushed
  // or not by using writableFinished API
  const value = response.writableFinished;
  
    
  // Display the result
  // by using end() api
  response.end( "Data has been flushed : "
             + 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..."); 
});

Javascript

// Node.js program to demonstrate the  
// response.writableFinished APi
    
// Importing http module 
var http = require('http'); 
  
// Request and response handler 
const http2Handlers = (request, response) => { 
    
  // checking all the data has been flushed or not
  // by using writableFinished API
  const value = response.writableFinished;
    
  // display result
  // by using end() api
  response.end( "Data has been flushed : " 
      + value, 'utf8', () => { 
      console.log("displaying the result..."); 
  
      const value1 = response.writableFinished;
      console.log("Data has been flushed "+value1);
      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

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。

Data has been flushed : false

示例 2：文件名：index.js

Javascript

// Node.js program to demonstrate the  
// response.writableFinished APi
    
// Importing http module 
var http = require('http'); 
  
// Request and response handler 
const http2Handlers = (request, response) => { 
    
  // checking all the data has been flushed or not
  // by using writableFinished API
  const value = response.writableFinished;
    
  // display result
  // by using end() api
  response.end( "Data has been flushed : " 
      + value, 'utf8', () => { 
      console.log("displaying the result..."); 
  
      const value1 = response.writableFinished;
      console.log("Data has been flushed "+value1);
      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

控制台输出：

Server is running at port 3000...
displaying the result...
Data has been flushed true

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。

Data has been flushed : false

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