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Regular Expression Details

Title Test Find Full Windows Folder Path
Expression
^([A-Za-z]:|\\{2}([-\w]+|((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]?))\\(([^"*/:?|<>\\,;[\]+=.\x00-\x20]|\.[.\x20]*[^"*/:?|<>\\,;[\]+=.\x00-\x20])([^"*/:?|<>\\,;[\]+=\x00-\x1F]*[^"*/:?|<>\\,;[\]+=\x00-\x20])?))\\([^"*/:?|<>\\.\x00-\x20]([^"*/:?|<>\\\x00-\x1F]*[^"*/:?|<>\\.\x00-\x20])?\\)*$
Description
Validates the format of a Windows folder path ending with a backslash using the drive path or Universal Naming Convention (UNC)--without using lookaround.<br><br>Windows folder components: <br>(I) The drive can only be one letter. <br>(II) The server name (1) can only contain letters, numbers, and hyphens. However, Windows does allow underscores--which aren’t standard characters in the Request for Comments (RFC) 1035 standard--for networks using the Microsoft DNS Server. (Reference: http://support.microsoft.com/default.aspx?scid=kb;en-us;222823) or (2) can be an IP address <br>(III) The share name (also called the service name) (1) Can contain any character except ones with an ASCII code in the range of 0 (x00) through 31 (x1F) and the following: " * / : ? | < > \ , ; [ ] + = (Reference: http://support.microsoft.com/default.aspx?scid=kb;en-us;236388) (2) Can begin or end with a period, but cannot contain all periods (3) Cannot begin or end with a space (4) There must be at least one character that is not a space or period if the rest of the share name contains periods and spaces or just periods. <br>(IV) The folder and subfolder names (without the drive, share, or server name) (1) Can contain any character except ones with an ASCII code in the range of 0 (x00) through 31 (x1F) and the following: " * / : ? | < > \ (Reference: http://msdn2.microsoft.com/en-us/library/aa365247.aspx) (2) Cannot begin or end with a space or period.
Matches
d:\, \\Dpk\T c\, E:\reference\h101\, \\be\projects$\Wield\Rff\, \\70.60.44.88\T d\SPC2\
Non-Matches
j:ohn\, \\Dpk\, G:\GD, \\cae\.. ..\, \\70.60.44\T d\SPC2\
Author Rating: The rating for this expression. John Marshall
Source
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