mime function

String? mime(
  1. String? fileName
)

Implementation

String? mime(String? fileName) {
  if (fileName == null || fileName.trim().isEmpty) {
    return null;
  }

  final int lastDot = fileName.lastIndexOf('.', fileName.length - 1);
  if (lastDot != -1) {
    final String extension = fileName.substring(lastDot + 1);
    return _mimeMaps[extension.toLowerCase()];
  } else {
    return null;
  }
}