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module ActionDispatch
module Http
module Parameters
extend ActiveSupport::Concern
PARAMETERS_KEY = "action_dispatch.request.path_parameters"
DEFAULT_PARSERS = {
Mime[:json].symbol => -> (raw_post) {
data = ActiveSupport::JSON.decode(raw_post)
data.is_a?(Hash) ? data : {_json: data}
}
}
included do
class << self
attr_reader :parameter_parsers
end
self.parameter_parsers = DEFAULT_PARSERS
end
module ClassMethods
def parameter_parsers=(parsers) # :nodoc:
@parameter_parsers = parsers.transform_keys { |key| key.respond_to?(:symbol) ? key.symbol : key }
end
end
# Returns both GET and POST \parameters in a single hash.
def parameters
params = get_header("action_dispatch.request.parameters")
return params if params
params = begin
request_parameters.merge(query_parameters)
rescue EOFError
query_parameters.dup
end
params.merge!(path_parameters)
set_header("action_dispatch.request.parameters", params)
params
end
alias :params :parameters
def path_parameters=(parameters) #:nodoc:
delete_header("action_dispatch.request.parameters")
# If any of the path parameters has an invalid encoding then
# raise since it's likely to trigger errors further on.
Request::Utils.check_param_encoding(parameters)
set_header PARAMETERS_KEY, parameters
rescue Rack::Utils::ParameterTypeError, Rack::Utils::InvalidParameterError => e
raise ActionController::BadRequest.new("Invalid path parameters: #{e.message}")
end
# Returns a hash with the \parameters used to form the \path of the request.
# Returned hash keys are strings:
#
# {'action' => 'my_action', 'controller' => 'my_controller'}
def path_parameters
get_header(PARAMETERS_KEY) || set_header(PARAMETERS_KEY, {})
end
private
def parse_formatted_parameters(parsers)
return yield if content_length.zero? || content_mime_type.nil?
strategy = parsers.fetch(content_mime_type.symbol) { return yield }
begin
strategy.call(raw_post)
rescue # JSON or Ruby code block errors
my_logger = logger || ActiveSupport::Logger.new($stderr)
my_logger.debug "Error occurred while parsing request parameters.\nContents:\n\n#{raw_post}"
raise ParamsParser::ParseError
end
end
def params_parsers
ActionDispatch::Request.parameter_parsers
end
end
end
end
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