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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::XML => :xml_simple,
Mime::JSON => :json
}
def initialize(app, parsers = {})
@app, @parsers = app, DEFAULT_PARSERS.merge(parsers)
end
def call(env)
if params = parse_formatted_parameters(env)
env["action_dispatch.request.request_parameters"] = params
end
@app.call(env)
end
private
def parse_formatted_parameters(env)
request = Request.new(env)
return false if request.content_length.zero?
mime_type = content_type_from_legacy_post_data_format_header(env) ||
request.content_mime_type
strategy = @parsers[mime_type]
return false unless strategy
case strategy
when Proc
strategy.call(request.raw_post)
when :xml_simple, :xml_node
data = Hash.from_xml(request.raw_post) || {}
data.with_indifferent_access
when :yaml
YAML.load(request.raw_post)
when :json
data = ActiveSupport::JSON.decode(request.raw_post)
data = {:_json => data} unless data.is_a?(Hash)
data.with_indifferent_access
else
false
end
rescue Exception => e # YAML, XML 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 content_type_from_legacy_post_data_format_header(env)
if x_post_format = env['HTTP_X_POST_DATA_FORMAT']
case x_post_format.to_s.downcase
when 'yaml' then return Mime::YAML
when 'xml' then return Mime::XML
end
end
nil
end
def logger(env)
env['action_dispatch.logger'] || ActiveSupport::Logger.new($stderr)
end
end
end
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