Problem with special characters in filename

[gdurelle]

Hi,
When i do upload a file, i need to match the filename on some other string datas, but i got an error when using special caracters..

params received:

Parameters: {"name"=>"Mylène.png", "_cardbiz_session"=>"be1d5b7a2f27c7c4979ac4c16fe8fc82", "authenticity_token"=>"9vmJ02DjgKYCpoBNUcWwUlpxDXA8ddcoALHXyT6wrnM=", "asset"=>{"file"=># < ActionDispatch::Http::UploadedFile:0x007f94d38d37d0 @original_filename="Mylène.png", @content_type="image/png", @headers="Content-Disposition: form-data; name="asset[file]"; filename="Myle\xCC\x80ne.png"\r\nContent-Type: image/png\r\n", @tempfile=# < File:/var/folders/q5/yvy_v9bn5wl_s5ccy_35qsmw0000gn/T/RackMultipart20130805-51100-1eh07dp > >}, "id"=>"copie-de-sm"}

I log this:

 * logger.debug file_name
 * logger.debug file_name.chars.map(&:to_s).inspect

Each time, same result:

* Mylène
   ["M", "y", "l", "e", "̀", "n", "e"]

* Loïc 
  ["L", "o", "i", "̈", "c"]

Thus my filename comparison fails and throw a weird error:

TypeError (no _dump_data is defined for class Binding)

I checked the encodings with loggers, utf-8 all the time.
working under ruby 1.9.3, rails 3.2.14. Added #encoding: utf-8 in top of any file involved.

If you have any idea of what it could be...

[gdurelle]

Seems to be linked to MACOSX.

https://www.ruby-forum.com/topic/4407424 refers to https://bugs.ruby-lang.org/issues/7267 MACOSX decomposing special characters into utf8-mac instead of utf-8...
while you can't know the encoding of a file name, just presupose it.

Thanks to our Linux guy where it works properly (because he has a real OS). :)