module ActionDispatch class Request class Utils # :nodoc: mattr_accessor :perform_deep_munge, default: true def self.each_param_value(params, &block) case params when Array params.each { |element| each_param_value(element, &block) } when Hash params.each_value { |value| each_param_value(value, &block) } when String block.call params end end def self.normalize_encode_params(params) if perform_deep_munge NoNilParamEncoder.normalize_encode_params params else ParamEncoder.normalize_encode_params params end end def self.check_param_encoding(params) case params when Array params.each { |element| check_param_encoding(element) } when Hash params.each_value { |value| check_param_encoding(value) } when String unless params.valid_encoding? # Raise Rack::Utils::InvalidParameterError for consistency with Rack. # ActionDispatch::Request#GET will re-raise as a BadRequest error. raise Rack::Utils::InvalidParameterError, "Non UTF-8 value: #{params}" end end end class ParamEncoder # :nodoc: # Convert nested Hash to HashWithIndifferentAccess. def self.normalize_encode_params(params) case params when Array handle_array params when Hash if params.has_key?(:tempfile) ActionDispatch::Http::UploadedFile.new(params) else params.each_with_object({}) do |(key, val), new_hash| new_hash[key] = normalize_encode_params(val) end.with_indifferent_access end else params end end def self.handle_array(params) params.map! { |el| normalize_encode_params(el) } end end # Remove nils from the params hash. class NoNilParamEncoder < ParamEncoder # :nodoc: def self.handle_array(params) list = super list.compact! list end end end end end