Function detectMimeTypeFromFile

pkg/chat/chat.go:203–216

detectMimeTypeFromFile reads the first 512 bytes of a file and uses content-based detection (magic bytes) to determine the MIME type.

(filePath string)

// detectMimeTypeFromFile reads the first 512 bytes of a file and uses
// content-based detection (magic bytes) to determine the MIME type.
func detectMimeTypeFromFile(filePath string) string {
	f, err := os.Open(filePath)
	if err != nil {
		return "application/octet-stream"
	}
	defer f.Close()

	buf := make([]byte, 512)
	n, _ := f.Read(buf)
	if n == 0 {
		return "application/octet-stream"
	}
	return DetectMimeTypeByContent(buf[:n])
}

// IsImageMimeType returns true if the MIME type is a supported image type.
func IsImageMimeType(mimeType string) bool {