TElSimpleSFTPClient.DownloadStream method

TElSimpleSFTPClient.DownloadStream

Downloads the remote file to the stream.

Declaration

[C#]
    void DownloadStream(string RemoteFileName, System.IO.Stream LocalStream, TSBFileTransferMode Mode);
    void DownloadStream(string RemoteFileName, System.IO.Stream LocalStream, TSBFileTransferMode Mode, long RestartFrom);
    void DownloadStream(string RemoteFileName, System.IO.Stream LocalStream, bool SuppressAdditionalOperations);

[VB.NET]
    Sub DownloadStream(ByVal RemoteFileName As String, ByVal LocalStream As System.IO.Stream, ByVal Mode As TSBFileTransferMode)
    Sub DownloadStream(ByVal RemoteFileName As String, ByVal LocalStream As System.IO.Stream, ByVal Mode As TSBFileTransferMode, ByVal RestartFrom As Long)
    Sub DownloadStream(ByVal RemoteFileName As String, ByVal LocalStream As System.IO.Stream, ByVal SuppressAdditionalOperations As Boolean)

[Pascal]
    procedure DownloadStream(const RemoteFileName : string; LocalStream : TStream; Mode : TSBFileTransferMode); overload;
    procedure DownloadStream(const RemoteFileName : string; LocalStream : TStream; Mode : TSBFileTransferMode; RestartFrom : Int64); overload;
    procedure DownloadStream(const RemoteFileName : string; LocalStream : TStream; SuppressAdditionalOperations : boolean); overload;

[C++]
    void DownloadStream(const std::string &RemoteFileName, TStream &LocalStream, TSBFileTransferMode Mode);
    void DownloadStream(const std::string &RemoteFileName, TStream *LocalStream, TSBFileTransferMode Mode);
    void DownloadStream(const std::string &RemoteFileName, TStream &LocalStream, TSBFileTransferMode Mode, int64_t RestartFrom);
    void DownloadStream(const std::string &RemoteFileName, TStream *LocalStream, TSBFileTransferMode Mode, int64_t RestartFrom);
    void DownloadStream(const std::string &RemoteFileName, TStream &LocalStream, bool SuppressAdditionalOperations);
    void DownloadStream(const std::string &RemoteFileName, TStream *LocalStream, bool SuppressAdditionalOperations);

[PHP]
    void DownloadStream(string $RemoteFileName, TStream $LocalStream, integer $Mode)
    void DownloadStream(string $RemoteFileName, TStream $LocalStream, integer $Mode, integer $RestartFrom)
    void DownloadStream(string $RemoteFileName, TStream $LocalStream, bool $SuppressAdditionalOperations)

[Java]
    void downloadStream(String RemoteFileName, TElStream LocalStream, TSBFileTransferMode Mode);
    void downloadStream(String RemoteFileName, TElStream LocalStream, TSBFileTransferMode Mode, long RestartFrom);
    void downloadStream(String RemoteFileName, TElStream LocalStream, boolean SuppressAdditionalOperations);

Parameters

RemoteFileName - remote path to the downloaded file
LocalStream - local stream to store the file to
Mode - specifies what to do if the file with the same name already exists
RestartFrom - can be used to resume broken transfer operation.When RestartFrom is set to non-zero positive value, the file being transferred is read starting from RestartFrom position and is written also starting from RestartFrom position.
SuppressAdditionalOperations - allows to overcome problems with some buggy SFTP servers by suppressing additional file operations.

Values

[.NET] [C++]	[Pascal]	Description
ftmOverwrite = 0	ftmOverwrite	The file will be overwritten
ftmSkip = 1	ftmSkip	The file will be skipped if the file with the same name exists
ftmAppendToEnd = 2	ftmAppend	All data from the source file isappended to the end of the destination file (if itexists). This mode is useful, for example, for updatingthe remote log file.
ftmResume = 3	ftmResume	Resumes the transfer of the file by transferring the data from the source file (starting from position specified in RestartFrom and up to the end) to the destination file (the data is written to position specified in RestartFrom ). This mode is used to resume the broken upload or download. In Resume mode the component compares the sizes of source and destination files (streams). If the size of the destination is smaller than the size of the source, the transfer is restarted from the position equal to the destination size (resuming the broken transfer). Resume mode doesn't compare file times, so your application should only use this mode if it (or the user) knows that the destination file is an incompletely transferred source file, and not, e.g., an older version of the same file.
ftmOverwriteIfDiffSize = 4	ftmOverwriteIfDiffSize	Defines a conditional overwrite onlywhen the file size is different. NOTE: file size isdetermined using the chosen transfer type (ascii/binary).In ASCII mode the file size can be determinedincorrectly, and you should not use conditionaloverwrite then.
ftmSaveWithNewName = 5	ftmSaveWithNewName	When a file has been transferred, and another file with the same name already exists, the new file will be saved with a new name.For each such file an OnFileNameChangeNeeded event is fired.
ftmRenameExistingTarget = 6	ftmRenameExistingTarget	In contrary to the ftmSaveWithNewName option, the existing file will be renamed, while the new file is saved under its original name.For each such file an OnFileNameChangeNeeded event is fired.

Description

Use this method when you want to download remote file to local stream. The method uses PipelineLength and DownloadBlockSize to calculate the size of the chunks, which are requested from the server. To select ASCII or binary transfer mode use ASCIIMode property.
In case of error, EElSFTPError exception containing SFTP error code, is raised. For more information on error handling, please read the corresponding how-to article.

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