Trying to correctly fformat multiple not statements

not or not

probably doesn't mean what you think. Consider

not A or not B

. Assuming that A, B and C are mutually exclusive conditions, the statement

not A or not B

is true under all of the following conditions:

• A is true
• B is true
• C is true

That's because

not A or not B

is true if: A is not true, if B is not true, or if both are not true. In the first case (

A is true

), B is not true, so the statement matches. In the second case (

B is true

), A is not true, so the statement matches. In the third case, both A and B are not true, so the statement matches. Putting this in terms of your command, consider:

not ($MY_URI starts_with "/abcd/web/abcdpayment.web/") or not ($MY_URI starts_with "/abcd/web/abcdpaymentprocessing.web/")

If

$MY_URI

starts_with "/abcd/web/abcdpayment.web/" this statement actually matches (that is, it evaluates to true) because the condition

not ($MY_URI starts_with "/abcd/web/abcdpaymentprocessing.web/")

is in fact true:

$MY_URI

does NOT start with "/abcd/web/abcdpaymentprocessing.web/".

You want

not and not

. Consider

not A and not B

. According to this:

• if A is true, the statement is false (because

  not A

  is false)
• if B is true, the statement is false (because

  not B

  is false)
• if C is true, the statement is true (because

  not A

  is true and

  not B

  is true)

Again, matching against your logic:

not ($MY_URI starts_with "/abcd/web/abcdpayment.web/") and not ($MY_URI starts_with "/abcd/web/abcdpaymentprocessing.web/")

Now, if

$MY_URI

starts with "/abcd/web/abcdpayment.web/", this statement is false.

Incidentally, this is exactly equivalent to:

not ($MY_URI starts_with "/abcd/web/abcdpayment.web/" or $MY_URI starts_with "/abcd/web/abcdpaymentprocessing.web/")