SQL Server

Download an FTP File into a BinData

Demonstrates the Chilkat Ftp2.GetFileBd method, which downloads a remote file and appends its bytes to a BinData. The first argument is the remote file path and the second is the BinData. No decoding or line-ending conversion is performed.

Background: Downloading into memory avoids a temporary local file when you intend to hash, parse, or forward the bytes immediately. Because it appends, existing bytes in the BinData are preserved — handy for concatenating several remote files, but clear it first when you want only this one. Since no conversion is applied, this is the safe way to pull content regardless of the current transfer type — which defaults to binary (SetTypeBinary), the recommended setting for essentially every file, text included. The SetTypeAscii mode applies legacy CRLF translation and is rarely needed.

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SQL Server

--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    --  Demonstrates the Ftp2.GetFileBd method, which downloads a remote file and appends its bytes to
    --  a BinData.  The 1st argument is the remote file path and the 2nd is the BinData.  No decoding
    --  or line-ending conversion is performed.

    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', 'myFtpLogin'

    --  Normally you would not hard-code the password in source.  You should instead obtain it
    --  from an interactive prompt, environment variable, or a secrets vault.
    EXEC sp_OASetProperty @ftp, 'Password', 'myPassword'

    EXEC sp_OAMethod @ftp, 'Connect', @success OUT
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @ftp
        RETURN
      END

    --  The BinData is not cleared automatically, so clear it first for replacement behavior.
    DECLARE @bd int
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @bd OUT

    EXEC sp_OAMethod @ftp, 'GetFileBd', @success OUT, 'public_html/image.png', @bd
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @ftp
        EXEC @hr = sp_OADestroy @bd
        RETURN
      END

    EXEC sp_OAGetProperty @bd, 'NumBytes', @iTmp0 OUT

    PRINT 'Downloaded ' + @iTmp0 + ' bytes into memory.'

    EXEC sp_OAMethod @ftp, 'Disconnect', @success OUT
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @ftp
        EXEC @hr = sp_OADestroy @bd
        RETURN
      END

    EXEC @hr = sp_OADestroy @ftp
    EXEC @hr = sp_OADestroy @bd


END
GO