On Sun, Mar 20, 2016 at 7:30 PM, Constantin Teodorescu <braila...@gmail.com> wrote: > On Sun, Mar 20, 2016 at 6:19 PM, Robert Newson <rnew...@apache.org> wrote: > >> As part of a new effort to improve replicator performance I'm planning to >> add new built-in filter functions. These run in the Erlang vm; saving the >> couchjs round trip. >> The first candidate is one that skips deleted documents as it's quite >> common to replicate with such a filter to remove deleted tombstones. >> This thread is for gathering more suggestions, so please help me out here. >> I'd like to reach the level we have for reduce functions which cover a good >> deal of the useful / functional cases. >> One filter I'm considering would allow filtering by the value of a named >> attribute. Something like "include this doc if doc.type equals 'purchase >> order'". Both the name and required value would be query parameters. >> > > It would be nice also: _design/* or even something like _id match regexp > ... > And the same for doc.type match regexp
That's the way to have a security issue by giving arbitrary user to run any regexp on server side. For instance: http://www.regular-expressions.info/catastrophic.html -- ,,,^..^,,,
