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Edit File : class_loader.rb \| Size : 1.99 KB
# frozen_string_literal: true require_relative 'omap' require_relative 'set' module Psych class ClassLoader # :nodoc: BIG_DECIMAL = 'BigDecimal' COMPLEX = 'Complex' DATE = 'Date' DATE_TIME = 'DateTime' EXCEPTION = 'Exception' OBJECT = 'Object' PSYCH_OMAP = 'Psych::Omap' PSYCH_SET = 'Psych::Set' RANGE = 'Range' RATIONAL = 'Rational' REGEXP = 'Regexp' STRUCT = 'Struct' SYMBOL = 'Symbol' def initialize @cache = CACHE.dup end def load klassname return nil if !klassname \|\| klassname.empty? find klassname end def symbolize sym symbol sym.to_sym end constants.each do \|const\| konst = const_get const class_eval <<~RUBY def #{const.to_s.downcase} load #{konst.inspect} end RUBY end private def find klassname @cache[klassname] \|\|= resolve(klassname) end def resolve klassname name = klassname retried = false begin path2class(name) rescue ArgumentError, NameError => ex unless retried name = "Struct::#{name}" retried = ex retry end raise retried end end CACHE = Hash[constants.map { \|const\| val = const_get const begin [val, ::Object.const_get(val)] rescue nil end }.compact].freeze class Restricted < ClassLoader def initialize classes, symbols @classes = classes @symbols = symbols super() end def symbolize sym return super if @symbols.empty? if @symbols.include? sym super else raise DisallowedClass.new('load', 'Symbol') end end private def find klassname if @classes.include? klassname super else raise DisallowedClass.new('load', klassname) end end end end end Back

Edit File : class_loader.rb | Size : 1.99 KB

# frozen_string_literal: true
require_relative 'omap'
require_relative 'set'

module Psych
  class ClassLoader # :nodoc:
    BIG_DECIMAL = 'BigDecimal'
    COMPLEX     = 'Complex'
    DATE        = 'Date'
    DATE_TIME   = 'DateTime'
    EXCEPTION   = 'Exception'
    OBJECT      = 'Object'
    PSYCH_OMAP  = 'Psych::Omap'
    PSYCH_SET   = 'Psych::Set'
    RANGE       = 'Range'
    RATIONAL    = 'Rational'
    REGEXP      = 'Regexp'
    STRUCT      = 'Struct'
    SYMBOL      = 'Symbol'

def initialize
      @cache = CACHE.dup
    end

def load klassname
      return nil if !klassname || klassname.empty?

find klassname
    end

def symbolize sym
      symbol
      sym.to_sym
    end

constants.each do |const|
      konst = const_get const
      class_eval <<~RUBY
        def #{const.to_s.downcase}
          load #{konst.inspect}
        end
      RUBY
    end

private

def find klassname
      @cache[klassname] ||= resolve(klassname)
    end

def resolve klassname
      name    = klassname
      retried = false

begin
        path2class(name)
      rescue ArgumentError, NameError => ex
        unless retried
          name    = "Struct::#{name}"
          retried = ex
          retry
        end
        raise retried
      end
    end

CACHE = Hash[constants.map { |const|
      val = const_get const
      begin
        [val, ::Object.const_get(val)]
      rescue
        nil
      end
    }.compact].freeze

class Restricted < ClassLoader
      def initialize classes, symbols
        @classes = classes
        @symbols = symbols
        super()
      end

def symbolize sym
        return super if @symbols.empty?

if @symbols.include? sym
          super
        else
          raise DisallowedClass.new('load', 'Symbol')
        end
      end

private

def find klassname
        if @classes.include? klassname
          super
        else
          raise DisallowedClass.new('load', klassname)
        end
      end
    end
  end
end

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