(SQL Server) Parse MIME to get Binary Data (such as GIF, JPG, or any binary file)

Demonstrates how to parse a MIME to get binary data. This example extracts the image data for a GIF image to an in-memory byte array, and also to a file.

This example uses a MIME test file located at http://www.chilkatsoft.com/testData/sampleMime2.txt. It contains the following MIME:

Content-Type: multipart/mixed;
 boundary="------------080707010302060306060800";

This is a multi-part message in MIME format.

--------------080707010302060306060800
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body.
--------------080707010302060306060800
Content-Disposition: attachment; filename="starfish.gif";
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif";

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
EIQYEJwQCJQYCJwYCM6clL2Ee5wpGIwhEK0YANatpdalnHMYCKUhCJQYAKUYAM6Ec5QhCJwhCPfW
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--------------080707010302060306060800--

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

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

    -- Load the sampleMime2.txt file into the MIME object.
    -- (This file is available at https://www.chilkatsoft.com/testData/sampleMime2.txt )

    DECLARE @success int
    EXEC sp_OAMethod @mime, 'LoadMimeFile', @success OUT, 'sampleMime2.txt'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @mime, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mime
        RETURN
      END

    -- The GIF image is the 2nd sub-part located directly under the
    -- top-level MIME node.  Indexing begins at 0, therefore the 2nd
    -- sub-part is at index 1.
    DECLARE @part2 int
    EXEC sp_OAMethod @mime, 'GetPart', @part2 OUT, 1

    -- The GetBodyBinary method returns the binary bytes
    -- of the part's body, automatically decoded from whatever
    -- content-transfer-encoding might be used (such as base64).
    EXEC sp_OAMethod @part2, 'GetBodyBinary', @binaryData OUT

    -- We now have the binary bytes of the GIF image in binaryData.
    -- Save it to a file.
    DECLARE @fac int
    -- Use "Chilkat_9_5_0.FileAccess" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.FileAccess', @fac OUT

    EXEC sp_OAMethod @fac, 'WriteEntireFile', @success OUT, 'out1.gif', @binaryData
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @fac, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mime
        EXEC @hr = sp_OADestroy @fac
        RETURN
      END

    -- An easier way to save the body content to a file,
    -- assuming your application does not need to access
    -- the binary data in-memory, is to call SaveBody
    EXEC sp_OAMethod @part2, 'SaveBody', @success OUT, 'out2.gif'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @part2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mime
        EXEC @hr = sp_OADestroy @fac
        RETURN
      END

    EXEC @hr = sp_OADestroy @part2


    PRINT 'Finished.'

    EXEC @hr = sp_OADestroy @mime
    EXEC @hr = sp_OADestroy @fac


END
GO