Function BinaryContentType

pkg/iostreams/content.go:24–36

BinaryContentType reports whether content appears to be binary and, if so, returns its detected MIME type. Textual content returns ("", false).

(content []byte)

// BinaryContentType reports whether content appears to be binary and, if so,
// returns its detected MIME type. Textual content returns ("", false).
func BinaryContentType(content []byte) (string, bool) {
	if len(content) == 0 {
		return "", false
	}
	ct := http.DetectContentType(content)
	if i := strings.IndexByte(ct, ';'); i >= 0 {
		ct = strings.TrimSpace(ct[:i])
	}
	if strings.HasPrefix(ct, "text/") {
		return "", false
	}
	return ct, true
}

// BinaryTerminalError reports that binary content was about to be written to a
// terminal, where it is unreadable and may carry control bytes.