SQL Server

FTP Non-Recursive Sync Directory (Download)

See more FTP Examples

Download files from the server that have filenames matchhing a pattern, and don't yet exist in a local directory. SQL Server

-- 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)
    DECLARE @success int
    SELECT @success = 0

    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @ftp int
    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', 'myUsername'
    EXEC sp_OASetProperty @ftp, 'Password', 'myPassword'
    EXEC sp_OASetProperty @ftp, 'Port', 21
    EXEC sp_OASetProperty @ftp, 'AuthTls', 1

    -- Connect and login to the FTP server.
    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 files are located.
    -- This step is only necessary if the files are not in the root directory
    -- of the FTP account.
    EXEC sp_OAMethod @ftp, 'ChangeRemoteDir', @success OUT, 'qa'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @ftp
        RETURN
      END

    -- Indicate that we only want to download files with filenames ending in ".txt"
    EXEC sp_OASetProperty @ftp, 'SyncMustMatch', '*.txt'

    -- Modes for synchronization are as follows:
    -- mode=0: Download all files
    -- mode=1: Download all files that do not exist on the local filesystem.
    -- mode=2: Download newer or non-existant files.
    -- mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server.
    -- mode=5: Download only missing files or files with size differences.
    -- mode=6: Same as mode 5, but also download newer files.
    -- mode=99: Do not download files, but instead delete remote files that do not exist locally.
    DECLARE @mode int
    SELECT @mode = 1

    -- Download all files matching "*.txt" from the current remote ftp directory.
    -- The files are downloaded into c:/temp/qa_output
    EXEC sp_OAMethod @ftp, 'SyncLocalDir', @success OUT, 'c:/temp/qa_output', @mode
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @ftp
        RETURN
      END

    -- Perhaps we wish to delete the files we just downloaded from the server..
    DECLARE @st int
    EXEC @hr = sp_OACreate 'Chilkat.StringTable', @st OUT

    EXEC sp_OAMethod @ftp, 'GetSyncedFiles', NULL, @st

    DECLARE @numFiles int
    EXEC sp_OAGetProperty @st, 'Count', @numFiles OUT
    DECLARE @i int
    SELECT @i = 0
    DECLARE @remoteFilename nvarchar(4000)

    WHILE @i < @numFiles
      BEGIN
        EXEC sp_OAMethod @st, 'StringAt', @remoteFilename OUT, @i


        PRINT 'Deleting ' + @remoteFilename + ' from the FTP server'
        EXEC sp_OAMethod @ftp, 'DeleteRemoteFile', @success OUT, @remoteFilename
        IF @success <> 1
          BEGIN
            EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
            PRINT @sTmp0
            EXEC @hr = sp_OADestroy @ftp
            EXEC @hr = sp_OADestroy @st
            RETURN
          END
        SELECT @i = @i + 1
      END

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

    EXEC @hr = sp_OADestroy @ftp
    EXEC @hr = sp_OADestroy @st


END
GO