Chilkat Examples

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(SQL Server) SFTP Download to Local Filesystem

Demonstrates how to download a file from an SSH server to the local filesystem. There are no limitations on file size, and the file is streamed directly to the local filesystem.

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
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example assumes the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @sftp int
    -- Use "Chilkat_9_5_0.SFtp" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.SFtp', @sftp OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        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 @hostname nvarchar(4000)
    SELECT @hostname = 'sftp.example.com'
    DECLARE @port int
    SELECT @port = 22
    DECLARE @success int
    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

    -- Open a file on the server:
    DECLARE @handle nvarchar(4000)
    EXEC sp_OAMethod @sftp, 'OpenFile', @handle OUT, 'hamlet.xml', 'readOnly', 'openExisting'
    EXEC sp_OAGetProperty @sftp, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @sftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @sftp
        RETURN
      END

    -- Download the file:
    EXEC sp_OAMethod @sftp, 'DownloadFile', @success OUT, @handle, 'c:/temp/hamlet.xml'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @sftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @sftp
        RETURN
      END

    -- Close the file.
    EXEC sp_OAMethod @sftp, 'CloseHandle', @success OUT, @handle
    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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