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Forum Discussion

uni's avatar
uni
Icon for Altocumulus rankAltocumulus
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
dev
devops
iRules
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Sep 13, 2007
Can you add logging and reply with the TCL error? It seemed to work as expected in a simple test with a parameter and value that start with a hypher (or two hyphens):


when RULE_INIT {
   set param_value "-par1=-val1"
   log local0. "\$param_value: $param_value"
   
   log local0. "\[split $param_value =\]: [split $param_value =]"
   log local0. "\[lindex \[split $param_value =\] 0\]: [lindex [split $param_value =] 0]"
}

Output:

Rule : $param_value: -par1=-val1

Rule : [split -par1=-val1 =]: -par1 -val1

Rule : [lindex [split -par1=-val1 =] 0]: -par1

Aaron