Duane wrote:
Peter Fern wrote:
All I'm trying to do is get PDNS to return a record verbatim from the
backend (actually, I've just reviewed the RFC, which says a
double-backslash in the zone must return a single in the response).
Simply matching '\\' and returning '\' is a low-cost operation, and
required for RFC compliance - I can't believe that this will result in a
significant load increase. In any case, load is not an issue for our
application - we can through more hardware at it. And expanding the
regex before adding to the backend is entirely impractical since we'd
potentially have to insert hundreds of thousands of records to match a
single pattern with a backref, depending on the numbering scheme.
I'm assuming you are talking about consecutive numbering, in which case
you just use a wildcard.
Correct, however we often have a requirement to match a substring and
sub it into another pattern to translate one number range to another,
hence the requirement for regex. And regardless - it's currently
impossible to escape characters like '+' since the backslashes are not
passed correctly.
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