WampFileMetadata.fromJson constructor

WampFileMetadata.fromJson(Map<String, dynamic> json)

Implementation

factory WampFileMetadata.fromJson(Map<String, dynamic> json) {
  if (json['version'] != 1) {
    throw const FormatException('Unsupported file metadata version');
  }
  final custom = json['custom'];
  if (custom != null && custom is! Map) {
    throw const FormatException('File metadata custom must be an object');
  }
  return WampFileMetadata(
    name: json['name'] as String? ?? '',
    size: json['size'] as int? ?? -1,
    chunkSize: json['chunk_size'] as int? ?? -1,
    contentType: json['content_type'] as String?,
    sha256Digest: json['sha256'] as String?,
    custom: custom == null ? null : Map<String, dynamic>.from(custom as Map),
  );
}