📜  Node.js URL.protocol API

📅  最后修改于: 2022-05-13 01:56:24.735000             🧑  作者: Mango

Node.js URL.protocol API

url.protocolurl模块中的类URL的内置应用程序编程接口,用于获取和设置 URL 的协议部分。当使用其中一种特殊协议解析 URL 时,url.protocol 属性可能会更改为另一种特殊协议,但不能更改为非特殊协议,反之亦然。

句法:

const url.protocol

返回值:返回 URL 的协议部分。

下面的例子说明了 Node.js 中url.protocol方法的使用:

示例 1:

Javascript
// Node program to demonstrate the 
// url.protocol API as Setter 
    
// Importing the module 'url'
const http = require('url');
    
// Creating and initializing myURL
const myURL = new URL('https://geeksforgeeks.org:80/foo#ram');
    
// Display href value of myURL before change
console.log("Before Change");
console.log(myURL.href);
    
// Assigning protocol portion
// using protocol
console.log();
myURL.protocol = 'http';
    
// Display href value of myURL after change
console.log("After Change");
console.log(myURL.href);


Javascript
// Node program to demonstrate the 
// url.protocol API as Setter 
    
// Importing the module 'url'
const http = require('url');
    
// Creating and initializing myURL
const myURL = new URL('https://geeksforgeeks.org:80/foo#ram');
    
// Display href value of myURL before change
console.log("Before Change");
console.log(myURL.href);
    
// Assigning protocol portion
// with non special protocol 
// using protocol
console.log();
myURL.protocol = 'xyz';
    
// Display href value of myURL after change
console.log("After Change");
console.log(myURL.href);


Javascript
// Node program to demonstrate the 
// url.protocol API as Getter 
   
// Importing the module 'url'
const http = require('url');
   
// Creating and initializing myURL
const myURL = new URL('https://geeksforgeeks.org:80/foo#ram');
   
// Getting the protocol portion
// using protocol
const protocol = myURL.protocol;
   
// Display hash value 
console.log("Protocol of current url is : " + protocol);


输出

Before Change
https://geeksforgeeks.org:80/foo#ram

After Change
http://geeksforgeeks.org/foo#ram

示例 2:此示例将特殊协议更改为非特殊协议。

Javascript

// Node program to demonstrate the 
// url.protocol API as Setter 
    
// Importing the module 'url'
const http = require('url');
    
// Creating and initializing myURL
const myURL = new URL('https://geeksforgeeks.org:80/foo#ram');
    
// Display href value of myURL before change
console.log("Before Change");
console.log(myURL.href);
    
// Assigning protocol portion
// with non special protocol 
// using protocol
console.log();
myURL.protocol = 'xyz';
    
// Display href value of myURL after change
console.log("After Change");
console.log(myURL.href);

输出

Before Change
https://geeksforgeeks.org:80/foo#ram

After Change
https://geeksforgeeks.org:80/foo#ram

示例 3:

Javascript

// Node program to demonstrate the 
// url.protocol API as Getter 
   
// Importing the module 'url'
const http = require('url');
   
// Creating and initializing myURL
const myURL = new URL('https://geeksforgeeks.org:80/foo#ram');
   
// Getting the protocol portion
// using protocol
const protocol = myURL.protocol;
   
// Display hash value 
console.log("Protocol of current url is : " + protocol);

输出:

Protocol of current url is : https:

注意:上面的程序将使用node myapp.js命令编译和运行。
参考: https://nodejs.org/api/url.html#url_url_protocol