Filter selection (1)

• Filters are activated according to certain criteria:

  • Request

    • method

    • scheme

    • host

    • path

    • query-string

  • Response

    • All of the above

    • MIME type (text/*, etc.)

• The push_filter() method is using these criteria to create a "match subroutine". A filter stack is actually a stack of [ $match_sub, $filter ] pairs.

• The match subroutine is used to create the actual list of filters that will act on the HTTP messages.