Home  >  Article  >  Web Front-end  >  What is the usage of url module in nodejs

What is the usage of url module in nodejs

WBOY
WBOYOriginal
2022-03-04 16:31:431874browse

在nodejs中,URL模块是用于处理和解析URL的,该模块提供了三个方法,分别是:1、parse方法用于将url解析成对象;2、format方法用于将对象转换成url字符串;3、resolve方法用于拼接URL。

What is the usage of url module in nodejs

本文操作环境:Windows10系统、nodejs 12.19.0版、Dell G3电脑。

nodejs中url模块的用法是什么

URL模块用于解析和处理URL字符串,提供了三个方法:

1、parse方法

将url解析成对象,parse方法原型:

url.parse(urlStr[, parseQueryString][, slashesDenoteHost])

可传递三个参数,第一个必须
urlStr:要解析成对象的url字符串
parseQueryString:是否解析查询参数,默认为false
slashesDenoteHost:是否以斜线解析主机名,默认为false

只给第一个参数:

var url = require('url');

var testUrl1 = 'z.qingk.cn/information-info/tengzhou/e75bab8405254b04b2fab0a9f54e4838/dbvbotovboussowbwssvossdqaxqssxw/7519fbc4d85ea4c3589d8d751c507222/b011a8c5bbab4050953cb722bccb5095?param1=111&param2=222'
var urlParseUrl1 = url.parse(testUrl1)
console.log(urlParseUrl1);

结果:
What is the usage of url module in nodejs

第二个参数设为true
也就是说要同时把url中?之后的查询参数解析成对象

var url = require('url');

var testUrl1 = 'z.qingk.cn/information-info/tengzhou/e75bab8405254b04b2fab0a9f54e4838/dbvbotovboussowbwssvossdqaxqssxw/7519fbc4d85ea4c3589d8d751c507222/b011a8c5bbab4050953cb722bccb5095?param1=111&param2=222'
var urlParseUrl1 = url.parse(testUrl1);
console.log(urlParseUrl1);

var urlParseUrl2 = url.parse(testUrl1,true);
console.info(urlParseUrl2);

结果:
What is the usage of url module in nodejs
第三个参数设置为true
也就是当不知道url协议时,以//为依据识别host

var testUrl2 = '//z.qingk.cn/information-info/tengzhou/e75bab8405254b04b2fab0a9f54e4838/dbvbotovboussowbwssvossdqaxqssxw/7519fbc4d85ea4c3589d8d751c507222/b011a8c5bbab4050953cb722bccb5095?param1=111&param2=222';

var urlParseUrl3 = url.parse(testUrl2,false,false);
console.info(urlParseUrl3);

var urlParseUrl4 = url.parse(testUrl2,false,true);
console.info(urlParseUrl4);

结果:
What is the usage of url module in nodejs

2、format方法

format就是parse的返过程,把对象转换成url字符串

var testObj1 = {
                protocol: null,
                slashes: true,
                auth: null,
                host: 'z.qingk.cn',
                port: null,
                hostname: 'z.qingk.cn',
                hash: null,
                search: '?param1=111&param2=222',
                query: 'param1=111&param2=222',
                pathname: '/information-info/tengzhou/e75bab8405254b04b2fab0a9f54e4838/dbvbotovboussowbwssvossdqaxqssxw/7519fbc4d85ea4c3589d8d751c507222/b011a8c5bbab4050953cb722bccb5095',
                path: '/information-info/tengzhou/e75bab8405254b04b2fab0a9f54e4838/dbvbotovboussowbwssvossdqaxqssxw/7519fbc4d85ea4c3589d8d751c507222/b011a8c5bbab4050953cb722bccb5095?param1=111&param2=222',
                href: '//z.qingk.cn/information-info/tengzhou/e75bab8405254b04b2fab0a9f54e4838/dbvbotovboussowbwssvossdqaxqssxw/7519fbc4d85ea4c3589d8d751c507222/b011a8c5bbab4050953cb722bccb5095?param1=111&param2=222'
                };
var rsUrl = url.format(testObj1);
console.info(rsUrl)

结果:

//z.qingk.cn/information-info/tengzhou/e75bab8405254b04b2fab0a9f54e4838/dbvbotovboussowbwssvossdqaxqssxw/7519fbc4d85ea4c3589d8d751c507222/b011a8c5bbab4050953cb722bccb5095?param1=111&param2=222

parse中每一种形式的url所生成的结果,format都可以进行逆过程的转换。

3、resolve方法

返回从根目录指定到当前目录的绝对路径url。返回结果去除参数和锚点,返回结果标准url路径格式

    var url=require('url');  
    //指定相对路径  
    var url1=url.resolve('http://qingk.cn/one/two/three','four');  
    console.log(url1); //http://qingk.cn/one/two/four  
    //指定根目录的相对路径  
    var url3=url.resolve('http://qingk.cn/one/two/three','/four');  
    console.log(url3); //http://qingk.cn/four  
    //带参数的相对路径  
    var url2=url.resolve('http://qingk.cn/one/two/three?name=zhangsan','four');  
    console.log(url2); //http://qingk.cn/one/two/four  
    //非标准分隔符的原路径  
    var url4=url.resolve('http://qingk.cn\\one#name1','/four');  
    console.log(url4);//http://qingk.cn/four  
    //非标准分隔符的相对路径  
    var url5=url.resolve('http://qingk.cn/one','\\two\\three');  
    console.log(url5);//http://qingk.cn/two/three

推荐学习:《nodejs视频教程

The above is the detailed content of What is the usage of url module in nodejs. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn