System.Zip2

Fields

• private FCompressionHandler : TZipFile.TCompressionDict
  
• private FOnCreateDecompressStream : TOnCreateCustomStream
  
• private FCreateDecompressStreamCallBack : TCreateCustomStreamCallBack
  
• private FMode : TZipMode
  
• private FStream : TStream
  
• private FFileStream : TFileStream
  
• private FStartFileData : Int64
  
• private FEndFileData : Int64
  
• private FFiles : TList<System.Zip2.TZipHeader>
  
• private FComment : TBytes
  
• private FUTF8Support : Boolean
  
• private FOnProgress : TZipProgressEvent
  
• private FCurrentFile : string
  
• private FCurrentHeader : TZipHeader
  

Methods

• public constructor Create  ( ) ;

  Create a TZipFile

• public destructor Destroy  ( ) ;
• private function TBytesToString  ( B :  TBytes )  : string ;
• private function StringToTBytes  ( S :  string )  : TBytes ;
• private function GetFileComment  ( Index :  Integer )  : string ;
• private function GetFileCount  ( )  : Integer ;
• private function GetFileInfo  ( Index :  Integer )  : TZipHeader ;
• private function GetFileInfos  ( )  : TArray<System.Zip2.TZipHeader> ;
• private function GetFileName  ( Index :  Integer )  : string ;
• private function GetFileNames  ( )  : TArray<System.string> ;
• private function GetComment  ( )  : string ;
• private procedure ReadCentralHeader  ( ) ;
• private procedure SetFileComment  ( Index :  Integer; Value :  string ) ;
• private procedure SetComment  ( Value :  string ) ;
• private procedure SetUTF8Support  ( const  Value :  Boolean ) ;
• private function LocateEndOfCentralHeader  ( var  Header :  TZipEndOfCentralHeader )  : Boolean ;
• private procedure DoZLibProgress  ( Sender :  TObject ) ;
• private function ZIP64_LocateEndOfCentralHeader  ( var  Header :  TZip64_EndOfCentralDirectory )  : Boolean ;
• protected procedure CheckFileName  ( const  ArchiveFileName :  string ) ;  virtual;
• class private procedure Create@  ( ) ;  class constructor noself;
• class private procedure Destroy@  ( ) ;  class destructor noself;
• public procedure RegisterCompressionHandler  ( Compression :  TZipCompression; CompressStream :  TStreamConstructor; DecompressStream :  TStreamConstructor ) ;  class;
• public procedure UnregisterCompressionHandler  ( Compression :  TZipCompression ) ;  class;
• public function IsValid  ( const  ZipFileName :  string )  : Boolean ;  static;

  Parameters

  • const  ZipFileName :  string  -  Path to Zip File
• public procedure ExtractZipFile  ( const  ZipFileName :  string; const  Path :  string; ZipProgress :  TZipProgressEvent  =  nil ) ;  static;

  Extract a ZipFile

  Parameters

  • const  ZipFileName :  string  -  File name of the ZIP filePath to extract to diskOn progress callback.
  • const  Path :  string  -  File name of the ZIP filePath to extract to diskOn progress callback.
  • ZipProgress :  TZipProgressEvent  =  nil  -  File name of the ZIP filePath to extract to diskOn progress callback.
• public procedure ZipDirectoryContents  ( const  ZipFileName :  string; const  Path :  string; Compression :  TZipCompression  =  zcDeflate ; ZipProgress :  TZipProgressEvent  =  nil ) ;  static;

  Zip the contents of a directory

  Parameters

  • const  ZipFileName :  string  -  File name of the ZIP filePath of directory to zipCompression mode.On progress callback.
  • const  Path :  string  -  File name of the ZIP filePath of directory to zipCompression mode.On progress callback.
  • Compression :  TZipCompression  =  zcDeflate  -  File name of the ZIP filePath of directory to zipCompression mode.On progress callback.
  • ZipProgress :  TZipProgressEvent  =  nil  -  File name of the ZIP filePath of directory to zipCompression mode.On progress callback.
• public function GetUTF8PathFromExtraField  ( const  AHeader :  TZipHeader; out  AFileName :  string )  : Boolean ;  class;

  Checks if header extra field contains unicode path, if true AFilename contains the unicode path

• public procedure Open  ( const  ZipFileName :  string; OpenMode :  TZipMode ) ;  overload;

  Opens a ZIP file for reading or writing.

  Parameters

  • const  ZipFileName :  string  -  Path to ZipFile File Mode to open file. zmWrite Creates a new ZIP file for writing. zmReadWrite Opens the file for reading and allows adding additional new files. zmRead Opens the file for reading.
  • OpenMode :  TZipMode  -  Path to ZipFile File Mode to open file. zmWrite Creates a new ZIP file for writing. zmReadWrite Opens the file for reading and allows adding additional new files. zmRead Opens the file for reading.
• public procedure Open  ( ZipFileStream :  TStream; OpenMode :  TZipMode ) ;  overload;
• public procedure Close  ( ) ;
• public procedure Extract  ( const  FileName :  string; const  Path :  string  =  ; CreateSubdirs :  Boolean  =  True ) ;  overload;

  Extract a single file

  Parameters

  • const  FileName :  string  -  File name in the archivePath to extract to diskThe output should create sub directories specified in the ZIP file
  • const  Path :  string  =   -  File name in the archivePath to extract to diskThe output should create sub directories specified in the ZIP file
  • CreateSubdirs :  Boolean  =  True  -  File name in the archivePath to extract to diskThe output should create sub directories specified in the ZIP file
• public procedure Extract  ( Index :  Integer; const  Path :  string  =  ; CreateSubdirs :  Boolean  =  True ) ;  overload;
• public procedure ExtractAll  ( const  Path :  string  =  ) ;

  Extract All files

  Parameters

  • const  Path :  string  =   -  Path to extract to.
• public procedure Read  ( const  FileName :  string; out  Bytes :  TBytes ) ;  overload;

  Read a file from arcive to an array of Bytes

  Parameters

  • const  FileName :  string  -  ZIP file FileNameOutput bytes
  • out  Bytes :  TBytes  -  ZIP file FileNameOutput bytes
• public procedure Read  ( Index :  Integer; out  Bytes :  TBytes ) ;  overload;
• public procedure Read  ( const  FileName :  string; out  Stream :  TStream; out  LocalHeader :  TZipHeader ) ;  overload;

  Get a stream to read a file from disk

  Parameters

  • const  FileName :  string  -  ZIP file FileNameOutput StreamLocal File header
  • out  Stream :  TStream  -  ZIP file FileNameOutput StreamLocal File header
  • out  LocalHeader :  TZipHeader  -  ZIP file FileNameOutput StreamLocal File header
• public procedure Read  ( Index :  Integer; out  Stream :  TStream; out  LocalHeader :  TZipHeader ) ;  overload;
• public procedure Add  ( const  FileName :  string; const  ArchiveFileName :  string  =  ; Compression :  TZipCompression  =  zcDeflate ) ;  overload;

  Add a file to the ZIP file

  Parameters

  • const  FileName :  string  -  FileName to be addedPath + Name of file in the arcive. If Ommitted, ExtractFileName(FileName) will be used.Compression mode.
  • const  ArchiveFileName :  string  =   -  FileName to be addedPath + Name of file in the arcive. If Ommitted, ExtractFileName(FileName) will be used.Compression mode.
  • Compression :  TZipCompression  =  zcDeflate  -  FileName to be addedPath + Name of file in the arcive. If Ommitted, ExtractFileName(FileName) will be used.Compression mode.
• public procedure Add  ( Data :  TBytes; const  ArchiveFileName :  string; Compression :  TZipCompression  =  zcDeflate ) ;  overload;

  Add a memory file to the ZIP file

  Parameters

  • Data :  TBytes  -  Bytes to be addedPath + Name of file in the arcive.Compression mode.
  • const  ArchiveFileName :  string  -  Bytes to be addedPath + Name of file in the arcive.Compression mode.
  • Compression :  TZipCompression  =  zcDeflate  -  Bytes to be addedPath + Name of file in the arcive.Compression mode.
• public procedure Add  ( Data :  TStream; const  ArchiveFileName :  string; Compression :  TZipCompression  =  zcDeflate ; AExternalAttributes :  TFileAttributes  =  [] ) ;  overload;

  Add a memory file to the ZIP file

  Parameters

  • Data :  TStream  -  Stream of file to be addedPath + Name of file in the arcive.Compression mode.External attributes for this file.
  • const  ArchiveFileName :  string  -  Stream of file to be addedPath + Name of file in the arcive.Compression mode.External attributes for this file.
  • Compression :  TZipCompression  =  zcDeflate  -  Stream of file to be addedPath + Name of file in the arcive.Compression mode.External attributes for this file.
  • AExternalAttributes :  TFileAttributes  =  []  -  Stream of file to be addedPath + Name of file in the arcive.Compression mode.External attributes for this file.
• public procedure Add  ( Data :  TStream; LocalHeader :  TZipHeader; CentralHeader :  PZipHeader  =  nil ) ;  overload;

  Add a memory file to the ZIP file. Allows programmer to specify the Local and Central Header data for more flexibility on what gets written. Minimal vailidation is done on the Header parameters; speficying bad options could result in a corrupted zip file.

  Parameters

  • Data :  TStream  -  Stream of file to be addedThe local header dataA Pointer to an optional central header. If no central Header is provided, the Local Header information is used.
  • LocalHeader :  TZipHeader  -  Stream of file to be addedThe local header dataA Pointer to an optional central header. If no central Header is provided, the Local Header information is used.
  • CentralHeader :  PZipHeader  =  nil  -  Stream of file to be addedThe local header dataA Pointer to an optional central header. If no central Header is provided, the Local Header information is used.
• public function IndexOf  ( const  FileName :  string )  : Integer ;

  Translate from FileName to index in ZIP Central Header

  Parameters

  • const  FileName :  string  -  Path + Name of file in the arcive.

Properties

• public CreateDecompressStreamCallBack : TCreateCustomStreamCallBack

  Callback called before a file inside a zip file is decompressed, allows access to the raw stream for decrypt purposes

  read FCreateDecompressStreamCallBack
  write FCreateDecompressStreamCallBack
  
• public Mode : TZipMode
  read FMode
  
• public FileCount : Integer
  read GetFileCount
  
• public FileNames : TArray<System.string>
  read GetFileNames
  
• public FileInfos : TArray<System.Zip2.TZipHeader>
  read GetFileInfos
  
• public FileName[Index] : string
  read GetFileName
  
• public FileInfo[Index] : TZipHeader
  read GetFileInfo
  
• public FileComment[Index] : string
  read GetFileComment
  write SetFileComment
  
• public Comment : string
  read GetComment
  write SetComment
  
• public UTF8Support : Boolean
  read FUTF8Support
  write SetUTF8Support