关于解析字符串

　　nodejs中提供的解析字符串模块；首先需要映入url模块和查询字符串模块

其中url提供的字符串解析方法为parse

const url = require('url');

const querystring = require('querystring');

'use strict';
const http = require('http');
const url = require('url');
const querystring = require('querystring');

const server = http.createServer((req, res) => {
    let realUrl = 'http://' + req.headers.host + req.url;
    let urlObj = url.parse(realUrl); //url提供的方法 解析url
    console.log(urlObj);
    let qsObj = querystring.parse(urlObj.query);
    res.writeHead(200, { 'content-type': 'text/html;charset = urf-8' });
    res.write('<h1>解析字符串</h1>');
    res.write(`用户名是:${qsObj.username}密码是:${qsObj.pwd}`);
    res.end();
})
server.listen(3003, () => {
    console.log('server is running at 3003');
})

　　此时我们就能够获取url上字符串中传的值了