(SQL Server) Restart/Resume FTP Upload

Demonstrates how to restart / resume an FTP upload.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @ftp int
    -- Use "Chilkat_9_5_0.Ftp2" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Ftp2', @ftp OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OASetProperty @ftp, 'Hostname', 'ftp.example.com'
    EXEC sp_OASetProperty @ftp, 'Username', 'login'
    EXEC sp_OASetProperty @ftp, 'Password', 'password'

    -- Connect and login to the FTP server.
    DECLARE @success int
    EXEC sp_OAMethod @ftp, 'Connect', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @ftp
        RETURN
      END

    -- Change to the remote directory where the file will be uploaded.
    EXEC sp_OAMethod @ftp, 'ChangeRemoteDir', @success OUT, 'temp'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @ftp
        RETURN
      END

    -- In this example, assume that a previous FTP upload failed,
    -- and the incomplete file (bigFile.zip) exists on the FTP server.
    -- You only need to set the RestartNext property to resume
    -- the upload.  When RestartNext is set, the next call
    -- to PutFile (or PutFileFromBinaryData, PutFileFromTextData)
    -- will automatically resume the upload from the point of failure.
    -- (The way it works is that the FTP component sends a "SIZE"
    -- command to the FTP server to find out how many bytes of
    -- the file already exist on the server.  It then begins
    -- uploading from that point.

    -- Note: After PutFile is called, the RestartNext property
    -- is automatically set to false.
    EXEC sp_OASetProperty @ftp, 'RestartNext', 1

    -- Upload a file with restart.
    DECLARE @localFilename nvarchar(4000)
    SELECT @localFilename = 'bigFile.zip'
    DECLARE @remoteFilename nvarchar(4000)
    SELECT @remoteFilename = 'bigFile.zip'

    EXEC sp_OAMethod @ftp, 'PutFile', @success OUT, @localFilename, @remoteFilename
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @ftp
        RETURN
      END

    EXEC sp_OAMethod @ftp, 'Disconnect', @success OUT


    PRINT 'File Uploaded!'

    EXEC @hr = sp_OADestroy @ftp


END
GO