THPDFDocumentProbe Record

THPDFDocumentProbe = record
  SourceName, Extension, MIMEType: string;
  HeaderBytes: TBytes;
  IsArchive: boolean;
  ArchiveEntryNames: THPDFStringArray;
  InputBytes, ArchiveCompressedBytes, ArchiveExpandedBytes: Int64;
  ArchiveLease: IInterface;
end;

注册表向每个识别器提供有界的头和存档元数据，而不加载条目负载

ArchiveLease 是不透明的每次打开实现令牌，自定义处理程序不得依赖或保留它

IHPDFDocumentHandler Interface