# NAME Hashids - generate short hashes from numbers # SYNOPSIS use Hashids; my $hashids = Hashids->new('this is my salt'); # encrypt a single number my $hash = $hashids->encrypt(123); # 'a79' my $number = $hashids->decrypt('a79'); # 123 # or a list $hash = $hashids->encrypt(1, 2, 3); # 'eGtrS8' my @numbers = $hashids->decrypt('eGtrS8'); # (1, 2, 3) # also get results in an arrayref my $numbers = $hashids->decrypt('eGtrS8'); # [1, 2, 3] # DESCRIPTION This is a port of the Hashids JavaScript library for Perl. Hashids was designed for use in URL shortening, tracking stuff, validating accounts or making pages private (through abstraction.) Instead of showing items as `1`, `2`, or `3`, you could show them as `b9iLXiAa`, `EATedTBy`, and `Aaco9cy5`. Hashes depend on your salt value. This implementation follows the v0.1.4 release of hashids.js. The current version of hashids.js (v0.3.0) uses a new algorithm, so the hashes produced by this Perl implementation will probably _not_ decrypt correctly on the new JavaScript version. I will be implementing the new algorithm very soon, and maybe probably allow some way to toggle between algorithms. # METHODS - my $hashids = Hashids->new(); Make a new Hashids object. This constructor accepts a few options: - salt => 'this is my salt' Salt string, this should be unique per Hashid object. - alphabet => 'abcdefghij' Alphabet set to use. This is optional as Hashids comes with a default set suitable for URL shortening. - minHashLength => 5 Minimum hash length. Use this to control how long the generated hash string should be. You can also construct with just a single argument for the salt: my $hashids = Hashids->new('this is my salt'); - my $hash = $hashids->encrypt($x, \[$y, $z, ...\]); Encrypt a single number (or a list of numbers) into a hash string. - my $number = $hashids->decrypt($hash); Decrypt a hash string into its number (or numbers.) Returns either a simple scalar if it is a single number, an arrayref of numbers if it decrypted a set, or `undef` if given bad input. Use [ref](http://search.cpan.org/perldoc?ref) on the result to ensure proper usage. You can also retrieve the result as a proper list by assigning it to an array variable, by doing so you will always get a list of one or more numbers that are decrypted from the hash, or the empty list if none were found: my @numbers = $hashids->decrypt($hash); # SEE ALSO [Hashids](http://www.hashids.org) # LICENSE Copyright (C) Zak B. Elep. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # AUTHOR Zak B. Elep Original Hashids JavaScript library written by [Ivan Akimov](http://twitter.com/ivanakimov) # THANKS Props to [Jofell Gallardo](http://twitter.com/jofell) for pointing this excellent project to me in the first place.