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SQL Server Examples

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(SQL Server) SFTP Resume Download

Demonstrates how to resume an SFTP download from a previous partial download.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    --  Important: It is helpful to send the contents of the
    --  sftp.LastErrorText property when requesting support.

    DECLARE @sftp int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.SFtp', @sftp OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    --  Any string automatically begins a fully-functional 30-day trial.
    DECLARE @success int
    EXEC sp_OAMethod @sftp, 'UnlockComponent', @success OUT, 'Anything for 30-day trial'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @sftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @sftp
        RETURN
      END

    --  Set some timeouts, in milliseconds:
    EXEC sp_OASetProperty @sftp, 'ConnectTimeoutMs', 5000
    EXEC sp_OASetProperty @sftp, 'IdleTimeoutMs', 10000

    --  Connect to the SSH server.
    --  The standard SSH port = 22
    --  The hostname may be a hostname or IP address.
    DECLARE @port int

    DECLARE @hostname nvarchar(4000)

    SELECT @hostname = 'www.my-ssh-server.com'
    SELECT @port = 22
    EXEC sp_OAMethod @sftp, 'Connect', @success OUT, @hostname, @port
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @sftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @sftp
        RETURN
      END

    --  Authenticate with the SSH server.  Chilkat SFTP supports
    --  both password-based authenication as well as public-key
    --  authentication.  This example uses password authenication.
    EXEC sp_OAMethod @sftp, 'AuthenticatePw', @success OUT, 'myLogin', 'myPassword'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @sftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @sftp
        RETURN
      END

    --  After authenticating, the SFTP subsystem must be initialized:
    EXEC sp_OAMethod @sftp, 'InitializeSftp', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @sftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @sftp
        RETURN
      END

    --  Download the file:
    DECLARE @remoteFilePath nvarchar(4000)

    DECLARE @localFilePath nvarchar(4000)

    SELECT @localFilePath = 'c:/temp/hamlet.xml'
    SELECT @remoteFilePath = 'subdir1/subdir2/hamlet.xml'
    --  The ResumeDownloadFileByName method will check
    --  the local file and begin downloading the remote file
    --  at the appropriate point.  For example, if the local
    --  file is already 215624 bytes long, it will begin downloading
    --  the remote file at the 215625'th byte -- appending to
    --  the local file.
    EXEC sp_OAMethod @sftp, 'ResumeDownloadFileByName', @success OUT, @remoteFilePath, @localFilePath
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @sftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @sftp
        RETURN
      END


    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @sftp


END
GO

 

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