func checkIfNoneMatch()

in internal/vfs/serving/serving.go [179:207]

• 29 lines of code
• 8 McCabe index (conditional complexity)

func checkIfNoneMatch(w http.ResponseWriter, r *http.Request) condResult {
	inm := r.Header.Get("If-None-Match")
	if inm == "" {
		return condNone
	}
	buf := inm
	for {
		buf = textproto.TrimString(buf)
		if len(buf) == 0 {
			break
		}
		if buf[0] == ',' {
			buf = buf[1:]
			continue
		}
		if buf[0] == '*' {
			return condFalse
		}
		etag, remain := scanETag(buf)
		if etag == "" {
			break
		}
		if etagWeakMatch(etag, w.Header().Get("Etag")) {
			return condFalse
		}
		buf = remain
	}
	return condTrue
}