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Forum Discussion

uni's avatar
uni
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Sep 13, 2007

Preventing interpreting variable as TCL

I have an iRule which is parsing the each field in a URI query. I am getting an occasional problem with a TCL error if $parameter starts with "-", as the interpreter assumes it is an option to the ...
application delivery
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uni's avatar
uni
Icon for Altocumulus rankAltocumulus
Oct 11, 2007
For anyone who cares, the solution to this was to add "--" after the switch statement, to ensure it parses the next item as the test value rather than one of the command switches:

switch -- [string tolower [lindex [split ${parameter} "="] 0]] {

hoolio's test didn't pick it up, because it was a problem with the switch command syntax, which he didn't use in his test.

Joe's suggestion is not correct: the {curly braces} protect the variable name, not the variable contents.

Thanks for your suggestions.