For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Joe_Pruitt's avatar
Joe_Pruitt
Apr 28, 2006
Data groups can be treated by TCL lists. To extract a item from a TCL list by index, you can use the lindex command.

when HTTP_REQUEST {
  set idx [matchclass [HTTP::uri] contains $::color]
  if { -1 != $idx } {
    set val [lindex $::color [expr $idx - 1]]
    log local0. "Found match index = $idx; value = $val"
  } else {
    log local0. "Didn't find a match"
  }
}

Keep in mind that the matchclass returns a index based at 1 while the lindex command expects a 0 based index. So, you'll have to throw in a [expr $found -1] to decrement to account for this.

-Joe