return i
			}
			i++
		}
	}
	return -1
}

func (r *Request) expectsContinue() bool {
	return hasToken(r.Header.get("Expect"), "100-continue")
}

func (r *Request) wantsHttp10KeepAlive() bool {
	if r.ProtoMajor != 1 || r.ProtoMinor != 0 {
		return false
	}
	return hasToken(r.Header.get("Connection"), "keep-alive")
}

func (r *Request) wantsClose() bool {
	if r.Close {

		closeNotifyCh: make(chan bool, 1),

		// We populate these ahead of time so we're not
		// reading from req.Header after their Handler starts
		// and maybe mutates it (Issue 14940)
		wants10KeepAlive: req.wantsHttp10KeepAlive(),
		wantsClose:       req.wantsClose(),
	}
	if isH2Upgrade {
		w.closeAfterReply = true
	}
	w.cw.res = w
	w.w = newBufioWriterSize(&w.cw, bufferBeforeChunkingSize)
	return w, nil
}