10000 一道腾讯手写题，如何判断 url 中只包含 qq.com · Issue #88 · sisterAn/blog · GitHub
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一道腾讯手写题，如何判断 url 中只包含 qq.com #88

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sisterAn opened this issue Apr 19, 2021 · 2 comments
Open

一道腾讯手写题，如何判断 url 中只包含 qq.com #88

sisterAn opened this issue Apr 19, 2021 · 2 comments

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@sisterAn
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例如：

http://www.qq.com  // 通过

http://www.qq.com.cn  // 不通过

http://www.qq.com/a/b  // 通过

http://www.qq.com?a=1  // 通过

http://www.123qq.com?a=1  // 不通过

解答：正则

function check(url){
  if(/\/\/w+\.qq\.com[^.]*$/.test(url)){
    return true;
  }else{
    return false;
  }

}
check('http://www.qq.com')
// true

check('http://www.qq.com.cn')
// false

check('http://www.qq.com/a/b')
// true

check('http://www.qq.com?a=1')
// true

check('http://www.123qq.com?a=1')
// false

这个正则很简单，包含 .qq.com 就可以，但是有一种情况，如果域名不是包含 qq.com 而仅仅是参数后面包含了 qq.com 怎么办？例如 http://www.baidu.com?redirect=http://www.qq.com/a

check('http://www.baidu.com?redirect=http://www.qq.com/a')
// true

如何排除这种情况？

function check(url){
  if(/^https?:\/\/w+\.qq\.com[^.]*$/.test(url)){
    return true;
  }else{
    return false;
  }

}
check('http://www.qq.com')
// true

check('http://www.qq.com.cn')
// false

check('http://www.qq.com/a/b')
// true

check('http://www.qq.com?a=1')
// true

check('http://www.123qq.com?a=1')
// false

check('http://www.baidu.com?redirect=http://www.qq.com/a')
// true

若有收获，就点个赞吧
@nooldey
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nooldey commented Apr 23, 2022

最后一个结果是false啊～

@RyanMeg123
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function check (url) { let reg = /^https?://\w+.qq.com[^.]*$/ return reg.test(url) }

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@nooldey @sisterAn @RyanMeg123
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