SQL Server

Directory Existence Check

See more FTP Examples

How to test if a directory exists on an FTP server.

A good way to check to see if a directory already exists is to try to "cd" to that remote directory by calling ChangeRemoteDir. If it succeeds, then the directory exists. If not, then it does not exist. An alternative method is to set the ListPattern = "*" and then iterate over the files/directories, looking for the 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', 'login'
    EXEC sp_OASetProperty @ftp, 'Password', 'password'

    -- 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

    -- Does the "temp" directory exist?
    DECLARE @dirExists int

    EXEC sp_OAMethod @ftp, 'ChangeRemoteDir', @dirExists OUT, '/temp'
    IF @dirExists = 1
      BEGIN

        PRINT 'Yes, the temp directory exists.'
        --  Yes, it exists. Restore the current remote dir:
        EXEC sp_OAMethod @ftp, 'ChangeRemoteDir', @success OUT, '..'
        IF @success <> 1
          BEGIN
            EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
            PRINT @sTmp0
            EXEC @hr = sp_OADestroy @ftp
            RETURN
          END
      END

    -- Alternatively, you may set the ListPattern = "*" and 
    --  look for the directory:
    EXEC sp_OASetProperty @ftp, 'ListPattern', '*'

    DECLARE @i int

    DECLARE @n int

    EXEC sp_OAMethod @ftp, 'GetDirCount', @n OUT
    IF @n < 0
      BEGIN
        -- Failed to get directory listing based on ListPattern
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @ftp
        RETURN
      END
    IF @n > 0
      BEGIN
        SELECT @i = 0
        WHILE @i <= @n - 1
          BEGIN
            DECLARE @isDir int

            EXEC sp_OAMethod @ftp, 'GetIsDirectory', @isDir OUT, @i
            IF @isDir = 1
              BEGIN
                DECLARE @fname nvarchar(4000)

                EXEC sp_OAMethod @ftp, 'GetFilename', @fname OUT, @i
                IF @fname = 'temp'
                  BEGIN

                    PRINT 'Found temp directory!'
                    EXEC sp_OAMethod @ftp, 'Disconnect', @success OUT
                    EXEC @hr = sp_OADestroy @ftp
                    RETURN
                  END
              END
            SELECT @i = @i + 1
          END
      END

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

    EXEC @hr = sp_OADestroy @ftp


END
GO