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External Data Source

Source

Regular Expression
^(?<scheme>(?:http|https|ftp|telnet|gopher|ms\-help|file|notes)://)?(?:(?<user>[a-z][\w~%!&amp;',;=\-\.$\(\)\*\+]*):(?<password>.*)?@)?(?:(?<domain>(?:[a-z0-9]\w*[a-z0-9]*\.)*(?:(?:(?:[a-z0-9]\w*[a-z0-9]*)(?:\.[a-z0-9]+)?)|(?:(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))))(?::(?<port>[0-9]+))?)?(?:(?<path>(?:/(?:[\w`~!$=;\-\+\.\^\(\)\|\{\}\[\]]|(?:%\d\d))+)*/(?:[\w`~!$=;\-\+\.\^\(\)\|\{\}\[\]]|(?:%\d\d))*)(?<params>\?[^#]+)?(?<fragment>#[a-z0-9]\w*)?)?$