Topic: Encoding issue under Windows (from UTF-8 to IBM866)

Windows console works with the CP866 encoding.

So input and output should be redefined to CP866.

This thread suggests a nice

Encoding.default_external = Encoding.find(Encoding.locale_charmap)
Encoding.default_internal = __ENCODING__

[STDIN, STDOUT, STDERR].each do |io|
  io.set_encoding(Encoding.default_external, Encoding.default_internal)

And it works. The text is now correctly displayed in Windows console.

But the code crashes whenever Ruby faces a string that contains a
non-CP866 character (like em dash):

in `write': U+2014 from UTF-8 to IBM866 (Encoding::UndefinedConversionError)

How do i overcome this error? Not using UTF-8 is not an option.

Iconv has a nice solution: add "//IGNORE" to encoding name and error no
longer takes place. But IO does not recognize "//IGNORE", so this
solution i unacceptable.

I can't use Iconv instead of IO due to the following reason. I use
RubyMine. Unlike Windows console, RubyMine console works in pure UTF-8.
But whenever code run by RubyMine writes to disk, it seems to use
Windows encoding because text gets written in corrupt encoding. sad And i
do not know a way to distinguish RubyMine from Windows console so that
my program could perfrom only the conversions necessary for the current

Last edited by lolmaus (2011-04-25 02:32:04)

Re: Encoding issue under Windows (from UTF-8 to IBM866)

You could trap the Encoding::UndefinedConversionError exception in whatever class is using this and take whatever action you deem appropriate using a begin rescue end block

What you want and what you need are too often not the same thing!
When your head is hurting from trying to solve a problem, stop standing on it. When you are the right way up you will see the problem differently and you just might find the solution.
(Quote by me 15th July 2009)