This is a Sinatra application which will connnect to SNP and look up a users barcode.
Realistically this can only be used within the Wellcome Trust Sanger Institute, but it does provide
a good example for integrating a Sinatra app with an Oracle database.

To run it:
export RAILS_ENV=development && ruby user_barcode.rb -p 3012

To view it:
http://localhost:3012

To use it:
http://localhost:3012/user_barcodes/lookup_user_login.xml?user_login=abc
http://localhost:3012/user_barcodes/lookup_scanned_barcode.xml?barcode=12344567890