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Cici Wirachmat Snippet ID Download Version Date Posted Author Delete 625 Ruby On Rails 2011-11-02 15:17 Cici Wirachmat Changes since last version:: Snippet ID: 199 199 4 2007-02-03 14:23 Silvan Golega Changes since last version:: Please correct or delete this version if I missed something, I am no expert in regular expressions. The suggested script above didn’t work for me for negative numbers so I adopted the regex to eval(json.gsub(/(["'])s:s(['"-?0-9tfn[{])/){"#{$1}=>#{$2}"}) Please note the additional -? that allows the missing minus sign. 149 3 2006-04-21 23:27 David Pollak Changes since last version:: Changes since last version:: Made the eval safe. Right now, the code is subject to a code injection attack. See http://dppruby.com/dppsrubyplayground/show/Safe+JSON Syntax and ease-of-use changes 35 1 2004-03-11 19:03 Ralph Mason

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Latest Snippet Version: :Ruby On Rails

 Build a SAFE JSON parser
# and execute JSON parsing safely

module SafeJSON
  require 'monitor'
  
  def SafeJSON.build_safe_json
    ret = nil
    waiter = ''
   # waiter.extend(MonitorMixin)
    wait_cond = waiter.new_cond
    
    Thread.start do
      $SAFE = 4
      ret = Proc.new {|json|
        eval(json.gsub(/(["'])\s*:\s*(['"-?0-9tfn\[{])/){"#{$1}=>#{$2}"})
      }
      waiter.synchronize do
        wait_cond.signal
      end
    end
    
    waiter.synchronize do
      wait_cond.wait_while { ret.nil? }
    end
    
    return ret
  end
  
  @@parser = SafeJSON.build_safe_json
  
  # Safely parse the JSON input
  def SafeJSON.parse(input)
    @@parser.call(input)
  rescue SecurityError
    return nil
  end
  
end
		

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