getSize() in javax.servlet.http.Part should return the number of bytes in the part.

If a multipart request is received with a part having charset=UTF-8 and a body with just a non-ascii letter like "å", then getSize() returns 1, but I would expect 2 as it's encoded as two bytes with the UTF-8 charset.

The example HTTP request would look something like this:

POST / HTTP/1.1
Content-Type: multipart/form-data; boundary=9WZrRBh_HG1r4SRLa2zdF0HF9ADOKF; charset=US-ASCII
Host: localhost:8000

--9WZrRBh_HG1r4SRLa2zdF0HF9ADOKF
Content-Disposition: form-data; name="ex"
Content-Type: text/plain; charset=UTF-8

å