(SQL Server) Parsing a Multipart/Digest Email

This example demonstrates how to parse a multipart/digest email. An email parsed by this sample could have a MIME structure as follows:

multipart/mixed
    text/plain
    text/plain
    multipart/digest
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
    text/plain

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
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @sTmp1 nvarchar(4000)
    -- Note: This example requires Chilkat v9.5.0.66 or greater.

    DECLARE @emlPath nvarchar(4000)
    SELECT @emlPath = 'qa_data/eml/multipart_digest.eml'

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

    -- For this example, we'll load the email from a .eml.
    -- The email could alternatively be loaded as a result of downloading from an IMAP or POP3 server..

    DECLARE @success int
    EXEC sp_OAMethod @email, 'LoadEml', @success OUT, @emlPath
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @email, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    DECLARE @numDigests int
    EXEC sp_OAGetProperty @email, 'NumDigests', @numDigests OUT

    PRINT 'num digests = ' + @numDigests

    DECLARE @i int
    SELECT @i = 0
    WHILE @i < @numDigests
      BEGIN
        DECLARE @eDigest int
        EXEC sp_OAMethod @email, 'GetDigest', @eDigest OUT, @i

        EXEC sp_OAGetProperty @eDigest, 'FromAddress', @sTmp0 OUT

        EXEC sp_OAGetProperty @eDigest, 'Subject', @sTmp1 OUT
        PRINT @i + ':' + @sTmp0 + ', ' + @sTmp1
        DECLARE @m nvarchar(4000)
        EXEC sp_OAMethod @eDigest, 'GetHeaderField', @m OUT, 'Message'
        EXEC sp_OAGetProperty @eDigest, 'LastMethodSuccess', @iTmp0 OUT
        IF @iTmp0 = 1
          BEGIN

            PRINT '    Message = ' + @m
          END
        EXEC @hr = sp_OADestroy @eDigest

        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @email


END
GO