URL的正则表达式

Question

我写了正则表达式验证URL,可能就像

• example.com

• www.example.com

• http://www.example.com

• https://www.example.com

所有4个都在工作

现在,如果我输入的文本(www.example.com - thisisincorrect),它允许我输入并保存到db

我使用的正则表达式是:

http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?

和

([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?

请帮忙!

Answer 1

您不需要URL的正则表达式,请使用System.Uri类.例如,通过使用Uri.IsWellFormedUriString方法:

bool isUri = Uri.IsWellFormedUriString(url, UriKind.RelativeOrAbsolute);

Answer 2

添加^和$

^http(s)?://([\w-]+.)+[\w-]+(/[\w- ./?%&=])?$

这匹配string(^)和end($)的开头

Answer 3

最佳正则表达式:

private bool IsUrlValid(string url)
{

    string pattern = @"^(http|https|ftp|)\://|[a-zA-Z0-9\-\.]+\.[a-zA-Z](:[a-zA-Z0-9]*)?/?([a-zA-Z0-9\-\._\?\,\'/\\\+&%\$#\=~])*[^\.\,\)\(\s]$";
    Regex reg = new Regex(pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
    return reg.IsMatch(url);
}

Answer 4

试试看：

bool IsValidURL(string URL)
{
    string Pattern = @"^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~:/?#[\]@!\$&'\(\)\*\+,;=.]+$";
    Regex Rgx = new Regex(Pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
    return Rgx.IsMatch(URL);
}

它将接受这样的 URL：

• http(s)://www.example.com
• http(s)://stackoverflow.example.com
• http(s)://www.example.com/page
• http(s)://www.example.com/page?id=1&product=2
• http(s)://www.example.com/page#start
• http(s)://www.example.com:8080
• http(s)://127.0.0.1
• 127.0.0.1
• www.example.com
• 例子.com