SQL Server

Iterate Email Headers

Demonstrates how to iterate over the email header fields. 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

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

    -- First, load an email from a file. 
    -- Note: an email object may be loaded from a file, or
    -- downloaded directly from a POP3 or IMAP server...

    EXEC sp_OAMethod @email, 'LoadEml', @success OUT, 'testReceivedHdrs.eml'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @email, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    -- How many header fields?
    DECLARE @n int

    EXEC sp_OAGetProperty @email, 'NumHeaderFields', @n OUT
    IF @n > 0
      BEGIN

        -- Display the name and value of each header:
        DECLARE @i int

        DECLARE @name nvarchar(4000)

        DECLARE @value nvarchar(4000)

        SELECT @i = 0
        WHILE @i <= @n - 1
          BEGIN
            EXEC sp_OAMethod @email, 'GetHeaderFieldName', @name OUT, @i
            EXEC sp_OAMethod @email, 'GetHeaderFieldValue', @value OUT, @i

            PRINT @i

            PRINT @name

            PRINT @value

            SELECT @i = @i + 1
          END

      END

    EXEC @hr = sp_OADestroy @email


END
GO