Unpack MHT MIME Text into Files

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Demonstrates Mht.UnpackMHTString, which extracts MHT data into its constituent parts: the HTML document and its referenced resources. The source is MHT MIME text supplied as a string.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

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

    DECLARE @mht int
    EXEC @hr = sp_OACreate 'Chilkat.Mht', @mht OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    --  The file paths are relative to the application's current working directory.  Absolute paths may
    --  also be used.  Supply the paths appropriate to your own environment.

    --  Load the MHT MIME text into a string.
    DECLARE @sbMht int
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbMht OUT

    DECLARE @bLoaded int
    EXEC sp_OAMethod @sbMht, 'LoadFile', @bLoaded OUT, 'qa_data/page.mht', 'utf-8'
    IF @bLoaded <> 1
      BEGIN

        PRINT 'Failed to load the MHT file.'
        EXEC @hr = sp_OADestroy @mht
        EXEC @hr = sp_OADestroy @sbMht
        RETURN
      END

    --  Unpack the MHT MIME text into its constituent parts.  The 1st argument may be MHT MIME text or a
    --  file path; the 2nd is the unpack directory, the 3rd is the main HTML filename, and the 4th is the
    --  sub-directory (relative to the unpack directory) for the referenced parts such as images and style
    --  sheets.
    EXEC sp_OAMethod @sbMht, 'GetAsString', @sTmp0 OUT
    EXEC sp_OAMethod @mht, 'UnpackMHTString', @success OUT, @sTmp0, 'qa_output/unpacked', 'index.html', 'parts'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @mht, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mht
        EXEC @hr = sp_OADestroy @sbMht
        RETURN
      END

    PRINT 'MHT unpacked.'

    EXEC @hr = sp_OADestroy @mht
    EXEC @hr = sp_OADestroy @sbMht


END
GO