On Mon, 12 Jan 1998, Nigel Metheringham wrote:
> Is there any good method for looking up *header* sender/recipients in a
> list of "baddies" other than a series of explicit filter lines, ie
>
> if $header_to: contains "friend@???" or
> $header_cc: contains "friend@???" or
> $header_from: contains "friend@???"
> then
>
>
> Say I have a list of these losers, I would like to be able to have a
> single if look for any of them (I suppose I could generate monster
> regexps, but thats not nice either).
This sort of thing is complicated by the fact that headers can contain
multiple addresses and the filter language doesn't support vectors and
iteration. (And I *don't* want to make it into Yet Another Programming
Language!)
I suppose a simple extension would be a "contains_any_of" operator, in
which the rhs was a list of things to match, so you have
if $header_to: contains_any_of "friend@???:enemy@???:...."
which would help a bit, but it's hardly simpler than the monster regexp.
You can, of course, do lookups with $header_to as a key, but that may
not in practice be particularly useful.
There is now a $message_headers variable, so you can at least do
if $message_headers contains "friend@???"
to search all of them at once, assuming that finding that string
anywhere in the headers is good enough for you. Or, you could be more
specific, and use
if "$header_to: $header_cc: $header_from:" contains "friend@???"
since the lhs is just another expanded string.
--
Philip Hazel University Computing Service,
ph10@??? New Museums Site, Cambridge CB2 3QG,
P.Hazel@??? England. Phone: +44 1223 334714
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