hello,

I tested senario on Centos.

when i test with UTF-8 encoded filename, it seemed wget measure wrong filename length.

When Content-Disposition header is set to 'attachment; filename*=UTF-8''%ea%b0%80%eb%82%98%eb%8b%a4%eb%9d%bc%eb%a7%88%eb%b0%94%ec%82%ac%ec%95%84%ec%9e%90%ec%b0%a8%ec%b9%b4%ed%83%80%ed%8c%8c%ed%95%98%ea%b0%80%eb%82%98%eb%8b%a4%eb%9d%bc%eb%a7%88%eb%b0%94%ec%82%ac%ec%95%84%ec%9e%90%ec%b0%a8%ec%b9%b4%ed%83%80%ed%8c%8c%ed%95%98%ea%b0%80%eb%82%98%eb%8b%a4%eb%9d%bc%eb%a7%88%eb%b0%94%ec%82%ac%ec%95%84%ec%9e%90%ec%b0%a8%ec%b9%b4%ed%83%80%ed%8c%8c%ed%95%98%ea%b0%80%eb%82%98%eb%8b%a4%eb%9d%bc%eb%a7%88%eb%b0%94%ec%82%ac%ec%95%84%ec%9e%90%ec%b0%a8aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
, the length of filename will be 212 bytes in decoded bytes(%ea => 1byte, %b0 => 1byte...and so on.) and this filename can be expressed in unix.
But 'wget --content-disposition restrict-file-names=unix,nocontrol     
<URL>' produces '가나다라마바사아자차카타파하가나다라마바사아자차카타파하가나다라마바사아자차카타파하가나다라마바사아자차aaaaaaaaaaaaaa' which is cut. I think if the decoded filename length is under the 255 bytes, it should work. Is there any rules measuring the filename length? Please give some help. thanks.