module ActionController::HttpAuthentication::Token

def encode_credentials(token, options = {})

Returns String.

options - optional Hash of the options.
token - String token.

Encodes the given token and options into an Authorization header value. 
def encode_credentials(token, options = {})
  values = ["token=#{token.to_s.inspect}"]
  options.each do |key, value|
    values << "#{key}=#{value.to_s.inspect}"
  end
  "Token #{values * ", "}"
end