Function checkWriteHeaderCode

tempfork/httprec/httprec.go:121–136

(code int)

}

func checkWriteHeaderCode(code int) {
	// Issue 22880: require valid WriteHeader status codes.
	// For now we only enforce that it's three digits.
	// In the future we might block things over 599 (600 and above aren't defined
	// at https://httpwg.org/specs/rfc7231.html#status.codes)
	// and we might block under 200 (once we have more mature 1xx support).
	// But for now any three digits.
	//
	// We used to send "HTTP/1.1 000 0" on the wire in responses but there's
	// no equivalent bogus thing we can realistically send in HTTP/2,
	// so we'll consistently panic instead and help people find their bugs
	// early. (We can't return an error from WriteHeader even if we wanted to.)
	if code < 100 || code > 999 {
		panic(fmt.Sprintf("invalid WriteHeader code %v", code))
	}
}

// WriteHeader implements [http.ResponseWriter].
func (rw *ResponseRecorder) WriteHeader(code int) {