(DataFlex) Get the Value of a MIME Header Field

Demonstrates how to get the value of a MIME header field. If the header field is not in the top-level MIME header, we must first navigate to the correct MIME part.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoMime
    Variant vMpRelated
    Handle hoMpRelated
    Variant vPJpg
    Handle hoPJpg
    String sTemp1

    Move False To iSuccess

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Get Create (RefClass(cComChilkatMime)) To hoMime
    If (Not(IsComObjectCreated(hoMime))) Begin
        Send CreateComObject of hoMime
    End

    // The contents of this MIME file are shown below, 
    // and is also available at https://www.chilkatsoft.com/sampleMime.txt
    Get ComLoadMimeFile Of hoMime "qa_data/mime/sampleMime.txt" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMime To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // The MIME used in this example has the following nested structure
    // 
    // multipart/alternative
    //     text/plain
    //     multipart/related
    //         text/html
    //         image/jpeg
    // 

    // Getting the content of a top-level MIME header is easy.
    // MIME header fields are case insensitive.
    Get ComGetHeaderField Of hoMime "subject" To sTemp1
    Showln "Subject = " sTemp1
    Get ComGetHeaderField Of hoMime "mime-version" To sTemp1
    Showln "MIME-Version = " sTemp1

    // To get a MIME header in a sub-part, first navigate to it..

    Get Create (RefClass(cComChilkatMime)) To hoMpRelated
    If (Not(IsComObjectCreated(hoMpRelated))) Begin
        Send CreateComObject of hoMpRelated
    End
    Get pvComObject of hoMpRelated to vMpRelated
    Get ComPartAt Of hoMime 1 vMpRelated To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMime To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatMime)) To hoPJpg
    If (Not(IsComObjectCreated(hoPJpg))) Begin
        Send CreateComObject of hoPJpg
    End
    Get pvComObject of hoPJpg to vPJpg
    Get ComPartAt Of hoMpRelated 1 vPJpg To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMpRelated To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComGetHeaderField Of hoPJpg "content-id" To sTemp1
    Showln "JPG Content-ID = " sTemp1
    Get ComGetHeaderField Of hoPJpg "content-type" To sTemp1
    Showln "JPG Content-Type = " sTemp1

    // --------------------------------------------------------------
    // --------------------------------------------------------------
    // The MIME sample file loaded at the beginning of this example
    // contains the following MIME:

    // Subject: Test email.
    // Content-Type: multipart/alternative;
    // 	boundary="------------DB171738719FB06D67DEBAA0"
    // MIME-Version: 1.0
    // 
    // --------------DB171738719FB06D67DEBAA0
    // Content-Type: text/plain; charset="utf-8"; format=flowed
    // Content-Transfer-Encoding: 7bit
    // 
    // This is a test.
    // 
    // --------------DB171738719FB06D67DEBAA0
    // Content-Type: multipart/related;
    // 	boundary="------------A940F1230E6F0105F03DB2CB"
    // 
    // --------------A940F1230E6F0105F03DB2CB
    // Content-Type: text/html; charset="utf-8"
    // Content-Transfer-Encoding: 8bit
    // 
    // <html><head>
    // <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    //   </head>
    //   <body bgcolor="#FFFFFF" text="#000000">
    //     <p>This is a test.&nbsp; <img src="cid:part1.E16AE3B4.1505C436@chilkatsoft.com" height="20" width="20"></p>
    //   </body>
    // </html>
    // 
    // --------------A940F1230E6F0105F03DB2CB
    // Content-Type: image/jpeg; name="starfish20.jpg"
    // Content-Transfer-Encoding: base64
    // Content-ID: <part1.E16AE3B4.1505C436@chilkatsoft.com>
    // Content-Disposition: inline; filename="starfish20.jpg"
    // 
    // /9j/4AAQSkZJRgABAQEASABIAAD//gAmRmlsZSB3cml0dGVuIGJ5IEFkb2JlIFBob3Rvc2hvcD8g
    // NC4w/9sAQwAQCwwODAoQDg0OEhEQExgoGhgWFhgxIyUdKDozPTw5Mzg3QEhcTkBEV0U3OFBtUVdf
    // YmdoZz5NcXlwZHhcZWdj/9sAQwEREhIYFRgvGhovY0I4QmNjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj
    // Y2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj/8IAEQgAFAAUAwERAAIRAQMRAf/EABcAAAMBAAAA
    // AAAAAAAAAAAAAAIDBAX/xAAYAQADAQEAAAAAAAAAAAAAAAABAgMEAP/aAAwDAQACEAMQAAAB2kZY
    // NNEijWKddfTmLgALWH//xAAbEAACAgMBAAAAAAAAAAAAAAABAgMRAAQSE//aAAgBAQABBQL0XqN+
    // pM2aqJGMiqFFCyg7z//EABwRAAICAgMAAAAAAAAAAAAAAAERAAIQIQMSUf/aAAgBAwEBPwHqU5aq
    // Axx+y1tMQl4elj//xAAcEQEAAQUBAQAAAAAAAAAAAAABEQACEBIhA1H/2gAIAQIBAT8B3Bhqy7Zc
    // enyiwmGgDhiOzj//xAAdEAABAwUBAAAAAAAAAAAAAAABAAIREBIhIkFR/9oACAEBAAY/ArZyn+Cg
    // xtxWuJaoCnqDuin/xAAcEAABBAMBAAAAAAAAAAAAAAABABEhYRAxQVH/2gAIAQEAAT8hkEwPUUR9
    // DYfE4nxtRpIkBTsayuALIiuY/9oADAMBAAIAAwAAABDWPTsf/8QAGhEAAwADAQAAAAAAAAAAAAAA
    // AAEREDFBIf/aAAgBAwEBPxC0DVPcWm+Ce4OesrkE6bjH/8QAGBEBAQEBAQAAAAAAAAAAAAAAAREA
    // QRD/2gAIAQIBAT8QahMiOc8YgSrnTY3ELclHXn//xAAcEAEBAAIDAQEAAAAAAAAAAAABEQAhMUFx
    // EFH/2gAIAQEAAT8Qn3igmSZSj+c4N4zapMy9IjFV98wncN2iuLFsCEbDGxQkI6RO/n//2Q==
    // 
    // --------------A940F1230E6F0105F03DB2CB--
    // 
    // --------------DB171738719FB06D67DEBAA0--
    // 


End_Procedure