actionpack/lib/action_controller/metal/parameter_encoding.rb


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module ActionController
  module ParameterEncoding
    extend ActiveSupport::Concern

    module ClassMethods
      def inherited(klass)
        super
        klass.setup_param_encode
      end

      def setup_param_encode
        @_parameter_encodings = {}
      end

      def encoding_for_param(action, param)
        if @_parameter_encodings[action.to_s] && @_parameter_encodings[action.to_s][param.to_s]
          @_parameter_encodings[action.to_s][param.to_s]
        else
          ::Encoding::UTF_8
        end
      end

      def parameter_encoding(action, param_name, encoding)
        @_parameter_encodings[action.to_s] ||= {}
        @_parameter_encodings[action.to_s][param_name.to_s] = encoding
      end
    end
  end
end