contentType property

@override Future<String?> contentType

The content type of the file if provided.

Implementation

@override
Future<String?> get contentType => _contentTypeMemo.runOnce(() async {
      final externalContentType = await super.contentType;
      if (externalContentType != null) {
        return externalContentType;
      }

      String? blobType;

      final file = _inputFile ?? _inputBlob;
      final path = super.path;

      if (file != null) {
        blobType = file.type;
      } else if (path != null) {
        blobType = (await _resolvedBlob).type;
      }

      // on Web blob.type may return an empty string
      // https://developer.mozilla.org/en-US/docs/Web/API/Blob/type#value
      if (blobType != null) {
        return blobType.isEmpty ? null : blobType;
      }

      return blobType;
    });