Install

gem install Safebox

Usage

First load the safebox:

require 'safebox'

The most things in your Safebox are possible:

value = Safebox.eval "1+2**9"
value = Safebox.eval {|| 1+2**8 }

Only some good things are not possible:

Safebox.eval "$stdout.puts 'I am OK!'"

But, very bad code will not damage your system.

Safebox.eval "class Unsecure;def self.code() system 'rm *' ; end end; Unsecure.code"

This will raise a SecurityError.

What is with raised exceptions?

Safebox.eval "raise Exception"

This will print the Exception.

Or if you want to get the Exception:

ret = Safebox.run "raise Exception"
ret # => [:exception, #<Exception>]

What is Safebox.run?

ret = Safebox.run "1+2**9"
ret # => [:value, 513]

You get something back, which can be unsafe!

Safebox.eval( "class A;def to_s() 'Owned!'; end end; A.new").to_s
puts Safebox.eval( "class A;def to_s() 'Owned!'; end end; A.new")