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# frozen_string_literal: true
module ActionController
# Specify binary encoding for parameters for a given action.
module ParameterEncoding
extend ActiveSupport::Concern
module ClassMethods
def inherited(klass) # :nodoc:
super
klass.setup_param_encode
end
def setup_param_encode # :nodoc:
@_parameter_encodings = {}
end
def binary_params_for?(action) # :nodoc:
@_parameter_encodings[action.to_s]
end
# Specify that a given action's parameters should all be encoded as
# ASCII-8BIT (it "skips" the encoding default of UTF-8).
#
# For example, a controller would use it like this:
#
# class RepositoryController < ActionController::Base
# skip_parameter_encoding :show
#
# def show
# @repo = Repository.find_by_filesystem_path params[:file_path]
#
# # `repo_name` is guaranteed to be UTF-8, but was ASCII-8BIT, so
# # tag it as such
# @repo_name = params[:repo_name].force_encoding 'UTF-8'
# end
#
# def index
# @repositories = Repository.all
# end
# end
#
# The show action in the above controller would have all parameter values
# encoded as ASCII-8BIT. This is useful in the case where an application
# must handle data but encoding of the data is unknown, like file system data.
def skip_parameter_encoding(action)
@_parameter_encodings[action.to_s] = true
end
end
end
end
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