using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?<scheme>\w+):\/\/((?<user>\w+)(\:(?<password>[^\/:]+))?@)?(?<hostname>[\w-.]+)(:(?<port>\d+))?\/(?<request>(?<path>[^#\s\?]+)(\?(?<query>[^#\s]+))?(#(?<fragment>[^#\s]+))?)?";
string input = @"https://example.org/absolute/URI/with/absolute/path/to/resource.txt
https://example.org/absolute/URI/with/absolute/path/to/resource.txt?a=alpha&b=bravo#bookmark
https://username:password@example.org:443/absolute/URI/with/absolute/path/to/resource.txt?a=alpha&b=bravo#bookmark
ftp://example.org/resource.txt
ftp://johndoe@example.org/resource.txt
ftp://janedoe:pa$$word@example.org/resource.txt
urn:ISSN:1535–3613
https://example.org/absolute/URI/with/absolute/path/to/resource.txt
https://username@example.org:443/absolute/URI/with/absolute/path/to/resource.txt?a=alpha&b=bravo#bookmark
https://username:password@example.org/absolute/URI/with/absolute/path/to/resource.txt?a=alpha&b=bravo#bookmark
https://username:pa$$w0rd@example.org:443/absolute/URI/with/absolute/path/to/resource.txt?a=alpha&b=bravo
//example.org/scheme-relative/URI/with/absolute/path/to/resource.txt
https://username:pa$$w0rd@example.org:443/absolute/URI/with/absolute/path/to/resource.txt#chap01
relative/path/to/resource.txt
../../../resource.txt
./resource.txt#frag01
resource.txt
#frag01
";
foreach (Match m in Regex.Matches(input, pattern))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx