Function MIMETypeFromReaderAt

internal/magic/magic.go:211–215

MIMETypeFromReaderAt takes a ReaderAt, sniffs the beginning of it, and returns the MIME type if sniffed, else the empty string.

(ra io.ReaderAt)

// MIMETypeFromReaderAt takes a ReaderAt, sniffs the beginning of it,
// and returns the MIME type if sniffed, else the empty string.
func MIMETypeFromReaderAt(ra io.ReaderAt) (mime string) {
	var buf [1024]byte
	n, _ := ra.ReadAt(buf[:], 0)
	return MIMEType(buf[:n])
}

// errReader is an io.Reader which just returns err.
type errReader struct{ err error }