Top Level Namespace

Defined Under Namespace

Classes: EvalError, Object, SafeEval

Constant Summary collapse

DEFAULT_SAFE_LEVEL = 
0

Instance Method Summary collapse

Instance Method Details

#bt ⇒ Object 



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# File 'lib/safe_eval.rb', line 56

def bt
  raise 'foo'
rescue => exp
  return exp.backtrace.join("\n")
end

#eval_safe_level ⇒ Object 



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# File 'lib/safe_eval.rb', line 4

def eval_safe_level
  $eval_safe_level || DEFAULT_SAFE_LEVEL
end

#safe_eval(str, ops = {}) ⇒ Object 



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# File 'lib/safe_eval.rb', line 41

def safe_eval(str,ops={})
  if true
    res = nil
    seconds = ops[:timeout] || 5
    Timeout::timeout(seconds) { res = safe_eval_thread(str,ops) }
    #puts "Thread return: #{res}"
    res
  else
    safe_eval_fork(str,ops)
  end
rescue(SecurityError) => exp
  exp = exp.exception("Eval code \"#{str}\"\n#{exp.message}")
  raise exp
end

#safe_eval_fork(str, ops) ⇒ Object 



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# File 'lib/safe_eval.rb', line 18

def safe_eval_fork(str,ops)
  fork do
    new_str = "$SAFE=#{eval_safe_level}; #{str}"
    $res = res = eval(new_str)
    puts "RES: #{res}"
  end
  Process.wait
end

#safe_eval_thread(str, ops = {}) ⇒ Object 



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# File 'lib/safe_eval.rb', line 27

def safe_eval_thread(str,ops={})
  res = nil
  level = ops[:safe] || eval_safe_level
  Thread.new do
    new_str = "$SAFE=#{level}; #{str}"
    res = eval(new_str)
    #puts "RES: #{res}"
  end.join
  res
end