Decodes a string given in our encoding and returns the decimal integer.

encodes a number into our *base* representation TODO can this be made better with some bitshifting?.

Create a log handler for every request it receives.

New constructs IPFilter instance.

WrapIPFilter is equivalent to NewIPFilter(opts) then Wrap(next).

someone set us up the bomb !!.

characters used for short-urls.

IPFilterOptions for IPFilter.