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require 'active_support/memoizable'
module ActionController
module Http
class Headers < ::Hash
extend ActiveSupport::Memoizable
def initialize(*args)
if args.size == 1 && args[0].is_a?(Hash)
super()
update(args[0])
else
super
end
end
def [](header_name)
if include?(header_name)
super
else
super(env_name(header_name))
end
end
private
# Converts a HTTP header name to an environment variable name.
def env_name(header_name)
"HTTP_#{header_name.upcase.gsub(/-/, '_')}"
end
memoize :env_name
end
end
end
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