https://bugzilla.wikimedia.org/show_bug.cgi?id=55197
--- Comment #8 from Kunal Mehta (Legoktm) legoktm.wikipedia@gmail.com --- Maybe the header is wrong. I found 'Accept-encoding' as header parameter but at https://www.mediawiki.org/wiki/API:Client%5C_Code header is described as 'Accept-Encoding' (capital Encoding)