case_sensitive_header.rb

# A case-sensitive header key, this is a workaroung for Net::HTTP's
# capitalizing headers as the standard allow any case for headers. 
# 
# But sometimes we have to works with some API providers whose backend servers
# do not follow standards
CaseSensitiveHeader = Data.define(:key) do
  def split(*)
    key.split(*).map { |k| self.class.new(k) }
  end

  def capitalize = key
  def downcase = self
  def to_s = self
end
		
# Usage
HTTParty.get('url', headers: { CaseSensitiveHeader['x-sensitive-header'] => 'value' })