func (h *RequestHeader) ConnectionUpgrade() bool {
	h.parseRawHeaders()
	return hasHeaderValue(h.Peek("Connection"), strUpgrade)
}
func (h *RequestHeader) ConnectionUpgrade() bool {
	h.parseRawHeaders()
	return hasHeaderValue(h.Peek("Connection"), strUpgrade)
}
func ( h * RequestHeader ) ConnectionUpgrade ( ) bool { h . parseRawHeaders ( ) return hasHeaderValue ( h . Peek ( " " ) , strUpgrade ) }
// ConnectionUpgrade returns true if 'Connection: Upgrade' header is set.
ConnectionUpgrade returns true if Connection : Upgrade header is set .