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Regular Expression Details

Title Test Find Full Windows Folder UNC Path
Expression
^\\{2}[-\w]+\\(([^"*/:?|<>\\,;[\]+=.\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 Universal Naming Convention (UNC)--without using lookaround.<br><br>Windows UNC folder components: <br>(I) The server name 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) <br>(II) 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>(III) The folder and subfolder names (without the share and server names) (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
\\Dpk\T c\, \\be\projects$\Wield\Rff\
Non-Matches
j:ohn\, \\Dpk\, G:\GD, \\cae\.. ..\, d:\, E:\reference\h101\
Author Rating: The rating for this expression. John Marshall
Source
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