How to enable TCL 8.5.x for iRules on 12.x

Hi,

you can open a support case for this.

but in your code, I do not see why you need externalpath.

and, when using matchvar in tcl, the value is a list of match. the first match is :

[lindex $externalpath 1]

instead of matchvar, you can use:

regsub -nocase "/extpath/" [HTTP::path] $internalpath newuri
HTTP::uri $newuri

another thing. ".*$" does not make sense. it search any character from match string to the end of the uri.

you should set regex : {^(/extpath/)} instead of {^(/extpath/).*$}