Node.js http。服务器响应.可写结束属性
原文:https://www . geesforgeks . org/node-js-http-server response-writableend-property/
http 模块内的类服务器响应的内置应用编程接口，用于检查是否调用了 response.end()。
语法:
response.writableEnded
参数:此方法不接受任何参数。
返回值:当且仅当 response.end()被调用时，该方法返回 true，否则返回 false。
示例 1:文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// response.writableEnded 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 the response.end has
// been called or not by using
// writableEnded API
const value = response.writableEnded;
// Display result
// by using end() api
response.end( "response.end() has been called : "
+ 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...");
});
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。
输出:
response.end() has been called : false
示例 2:Filename:index . js
Javascript
// Node.js program to demonstrate the
// response.writableEnded APi
// Importing http module
var http = require('http');
// Request and response handler
const http2Handlers = (request, response) => {
// Checking if the response.end has
// been called or not by using
// writableEnded API
const value = response.writableEnded;
if(value)
response.write(
"<h1>Response.end() has been called<h1>")
else
response.write(
"<h1>Response.end() has been not called<h1>")
// Ending the response
response.end()
};
// 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...
浏览器输出:粘贴 localhost 地址 http://localhost:3000/。在浏览器的搜索栏中。
输出:
Response.end() has been not called
参考:https://nodejs . org/dist/latest-v 12 . x/docs/API/http . html # http _ response _ writableended
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