XmlHttpRequest inappropriately modifies Content-type request header value by itself

[Archie888]

Hi,

I am trying to upload a file to Dropbox using XmlHttpRequest, in a QML application. I am getting the following error:

Error in call to API function "files/upload": Bad HTTP "Content-Type" header: "application/octet-stream;charset=UTF-8".
Expecting one of "application/octet-stream", "text/plain; charset=dropbox-cors-hack".

I seems that no matter which value I set to the Content-Type request header, it always adds

;charset=UTF-8

to the end.

As data, I am only using a string, as I am simply trying to make things work first:

request.send("Example text abcdefg")

How to deal with this issue?

Cheers,
-A888