module ActionDispatch::Http::Parameters::ClassMethods

# File actionpack/lib/action_dispatch/http/parameters.rb, line 44
def parameter_parsers=(parsers)
  @parameter_parsers = parsers.transform_keys { |key| key.respond_to?(:symbol) ? key.symbol : key }
end

Configure the parameter parser for a given MIME type.

It accepts a hash where the key is the symbol of the MIME type and the value is a proc.

original_parsers = ActionDispatch::Request.parameter_parsers
xml_parser = -> (raw_post) { Hash.from_xml(raw_post) || {} }
new_parsers = original_parsers.merge(xml: xml_parser)
ActionDispatch::Request.parameter_parsers = new_parsers