求一个正确的网址正则表达式，急

Question

求一个正确的网址正则表达式，急   

Answer 1

  string input = @"http://torch.2008.sina.com.cn/jz/other/2008-04-11/040666651.shtml\1";
        string pattern = @"^http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?$";
        if (Regex.IsMatch(input, pattern))
        {
            Response.Write("成功");
        }
        else
        {
            Response.Write("失败");
        }

Answer 2

 string input = @"Http://torch.2008.sina.com.cn/jz/other/2008-04-11/040666651.shtml";
        string pattern = @"^htp(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?$";
        if (Regex.IsMatch(input,pattern,RegexOptions.IgnoreCase))
        {
            Response.Write("成功");
        }
        else
        {
            Response.Write("失败");
        }不区分大小写

Answer 3

^(\w+:\/\/)?([^\ .]+)(\.[^/: ]+)(:\d*)?([^# ]*)$赋值时c#使用@前辍，或者不使用@前辍但对\进行转义