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jgranieri_42214's avatar
jgranieri_42214
Icon for Nimbostratus rankNimbostratus
Jul 29, 2015

Need to apply regex to a variable

Hello,

I have a need for regex to find the 2nd occurrence of a character and capture the data until the end. I tested my regex here and confirmed this regex will do what I need it to "[^@]+$". My issue is that when I test this via a simple irule the TCL regex doesn't seem to work at all. Any pointers would be great.

when CLIENT_ACCEPTED {
    set $Login "jeff@test1@bank1" 
    log local0. "TC login string is: $Login"
    set Result {regexp /[^@]+$/ $Login}
    log local0. "This is the parsed data $Result"
}

Expected result = bank1

application delivery
devops
iRules
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1 Reply

  • Kevin_Stewart's avatar
    Kevin_Stewart
    Icon for Employee rankEmployee
    Jul 29, 2015

    You're actually pretty close:

    when RULE_INIT {
    set logon "jeff@test1@bank1"

    regexp {[^@]+$} $logon result

    log local0. $result
}

    But you might be better off avoiding the regex with something more robust. Here's a few example options:

    when RULE_INIT {
    set logon "jeff@test1@bank1"

    scan $logon {%*[^@]@%*[^@]@%s} result

    log local0. $result
}

    or:

    when RULE_INIT {
    set logon "jeff@test1@bank1"

    set result [string range $logon [expr [string last "@" $logon] +1] end]

    log local0. $result
}