Setting XMLHttpRequest raw header makes header name uppercase.

Javascript function called from QML is:

function sendRequest(request) {
var xhr2 = new XMLHttpRequest;
xhr2.open("GET", request);

if(xhr2.readyState == XMLHttpRequest.OPENED)

{ xhr2.setRequestHeader('Content-type','hipitihei'); }

xhr2.send();
}

Sniffing network traffic shows the package has CONTENT-TYPE set to "hipitihei\r\n" as it should - though "Content-type" is curiously with all-uppercase.