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require 'active_support/core_ext/hash/conversions'
require 'action_dispatch/http/request'
require 'active_support/core_ext/hash/indifferent_access'
module ActionDispatch
class ParamsParser
class ParseError < StandardError
attr_reader :original_exception
def initialize(message, original_exception)
super(message)
@original_exception = original_exception
end
end
DEFAULT_PARSERS = {
Mime::JSON => lambda { |raw_post|
data = ActiveSupport::JSON.decode(raw_post)
data = {:_json => data} unless data.is_a?(Hash)
Request::Utils.deep_munge(data).with_indifferent_access
}
}
def initialize(app, parsers = {})
@app, @parsers = app, DEFAULT_PARSERS.merge(parsers)
end
def call(env)
default = env["action_dispatch.request.request_parameters"]
env["action_dispatch.request.request_parameters"] = parse_formatted_parameters(env, @parsers, default)
@app.call(env)
end
private
def parse_formatted_parameters(env, parsers, default)
request = Request.new(env)
return default if request.content_length.zero?
strategy = parsers.fetch(request.content_mime_type) { return default }
strategy.call(request.raw_post)
rescue => e # JSON or Ruby code block errors
logger(env).debug "Error occurred while parsing request parameters.\nContents:\n\n#{request.raw_post}"
raise ParseError.new(e.message, e)
end
def logger(env)
env['action_dispatch.logger'] || ActiveSupport::Logger.new($stderr)
end
end
end
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