Node.js http。引入消息.拖车方法
原文:https://www . geesforgeks . org/node-js-http-incoming message-trainers-method/
http。传入消息.预告片是 http 模块内类传入消息的内置应用编程接口，用于获取请求/响应预告片对象。
语法:
request.trailers or response.trailers
参数:该方法不接受任何参数作为参数。
返回值:该方法返回请求或响应拖车对象。
示例 1:文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// request.trailers 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){
// Getting trailers
// by using request.trailers Api
const value = request.trailers;
// Display the request trailers
console.log(value)
// Display the result
response.end( "hello world", '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 localhost 地址 http://localhost:3000/。在浏览器的搜索栏中。 T3】
示例 2:文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// request.trailers APi
// Importing http module
var http = require('http');
// Request and response handler
const http2Handlers = (request, response) => {
// Getting trailers
// by using request.trailers Api
const value = request.trailers;
// Display the request trailer
console.log(value)
// Display result
response.end( "GeeksForGeeks", 'utf8', () => {
console.log("displaying the result...");
//Closing the server
httpServer.close(()=>{
console.log("server is closed")
})
});
};
// Creating http Server and listening
// on the 3000 port
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 closedserver is closed
浏览器输出:粘贴 localhost 地址 http://localhost:3000/。在浏览器的搜索栏中。
GeeksForGeeks
参考:https://nodejs . org/dist/latest-v 12 . x/docs/API/http . html # http _ message _ traines
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