if syntax help!

Nested conditional statements are absolutely legal.

So, this IS legal:

when HTTP_REQUEST {
  if { condition_1 } {
    if { condition_2 } {
      if { condition_3 } {
      } elseif { condition_4 } {
         and on and on an on...
      } else {
      }
    } elseif { condition_5 } {
    } else {
    }
  } elseif { condition_6 } {
  } else {
  }
}

But the when statement is a special F5 extension to TCL that allows for event triggering. Think of it like a function in C. These are only allowed at the outermost scope within an iRule.

This is NOT legal:

when HTTP_REQUEST {
  when HTTP_RESPONSE {
  }
}

But, this IS legal:

when HTTP_REQUEST {
  ...
}
when HTTP_RESPONSE {
  ...
}

-Joe