anchor.diff:  %%%-------------------------------------------------------------------
   -module(http_utils).
   
  +%% Methods understood by rest handlers in Onedata applications.
  +-type method() :: 'GET' | 'POST' | 'PUT' | 'PATCH' | 'DELETE' | 'OPTIONS'.
  +-export_type([method/0]).
  +
   -define(EMAIL_VALIDATION_REGEXP,
       <<"^[a-zA-Z0-9!#$%&'*+\\/=?^_`{|}~-]+(?:\\.[a-zA-Z0-9!#$%&'*+\\/=?^_`{|}~-]+)*@(?"
       ":[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$">>
  
positive.code:             <<NoDots/binary, "@gmail.com">>;
          _ ->
              Email
      end.
negative.code: 
  % According to RFC 5321
  -define(EMAIL_MAX_LENGTH, 254).
  
  -export([method_to_binary/1, binary_to_method/1]).
  
  % URL encoding/decoding
  -export([url_encode/1]).
  