I'm trying to parse parameters from POST request

POST /url HTTP/1.1
...
content-type: application/x-www-form-urlencoded;charset=UTF-8

0xEF0xBB0xBFparam1=...

for this purpose I use HTMLForm constructor

HTTPServerRequest rq;
HTMLForm form(rq, rq.stream());

down the call stack in

void HTMLForm::readUrl(std::istream& istr)

I see the code doesn't check for content type and BOM, so first parameter name will be 0xEF0xBB0xBFparam1 instead of param1