aboutsummaryrefslogblamecommitdiffstats
path: root/actionpack/lib/action_dispatch/middleware/params_parser.rb
blob: fb70b60ef6e35dc6fccae94670c405dd6f71b2cb (plain) (tree)
1
2
3
4
5
6
                                                  
                                      
                                                         
 
                     
                    







                                                 
 
                                             
 

                                                          



                                                 
                                                                  










                                                    
                                                      



                                    

                                         
                  
                                                         
                                                         
                                                                 

               
           
                                                            
                                                                                                              
 
                                          

         
                     
                                                                           
         
     
   
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 => :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?

        strategy = @parsers[request.content_mime_type]

        return false unless strategy

        case strategy
        when Proc
          strategy.call(request.raw_post)
        when :json
          data = ActiveSupport::JSON.decode(request.body)
          data = {:_json => data} unless data.is_a?(Hash)
          Request::Utils.deep_munge(data).with_indifferent_access
        else
          false
        end
      rescue Exception => 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