func net/http/httputil.upgradeType

4 uses

	net/http/httputil (current package)
		reverseproxy.go#L394: 	reqUpType := upgradeType(outreq.Header)
		reverseproxy.go#L730: func upgradeType(h http.Header) string {
		reverseproxy.go#L738: 	reqUpType := upgradeType(req.Header)
		reverseproxy.go#L739: 	resUpType := upgradeType(res.Header)