(DataFlex) Build a multipart/related MIME Message

Demonstrates how to construct a multipart/related MIME message containing HTML and a related JPG image.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoMime
    Handle hoCrypt
    Handle hoSbContentId
    Handle hoSbHtml
    Integer iNumReplacements
    Variant vHtmlMime
    Handle hoHtmlMime
    Handle hoFac
    Variant hoJpgBytes
    Variant vJpgMime
    Handle hoJpgMime
Hdr    Handle hoSbContentIdHdr
    String sTemp1

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

    // Start with an empty MIME object...
    Get Create (RefClass(cComChilkatMime)) To hoMime
    If (Not(IsComObjectCreated(hoMime))) Begin
        Send CreateComObject of hoMime
    End

    // Initialize it as multipart/related.
    Get ComNewMultipartRelated Of hoMime To iSuccess

    // Set a top-level MIME header field.
    Get ComSetHeaderField Of hoMime "Subject" "Test HTML email with JPG image." To iSuccess

    // Generate a Content-ID.  This will contain random data that will allow
    // the HTML's "img" tag to reference the image part in the MIME.
    Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt
    If (Not(IsComObjectCreated(hoCrypt))) Begin
        Send CreateComObject of hoCrypt
    End
    Set ComEncodingMode Of hoCrypt To "hex"

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbContentId
    If (Not(IsComObjectCreated(hoSbContentId))) Begin
        Send CreateComObject of hoSbContentId
    End
    Get ComAppend Of hoSbContentId "part1." To iSuccess
    Get ComGenRandomBytesENC Of hoCrypt 4 To sTemp1
    Get ComAppend Of hoSbContentId sTemp1 To iSuccess
    Get ComAppend Of hoSbContentId "." To iSuccess
    Get ComGenRandomBytesENC Of hoCrypt 4 To sTemp1
    Get ComAppend Of hoSbContentId sTemp1 To iSuccess
    Get ComAppend Of hoSbContentId "@chilkatsoft.com" To iSuccess

    // Create the HTML body.
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbHtml
    If (Not(IsComObjectCreated(hoSbHtml))) Begin
        Send CreateComObject of hoSbHtml
    End
    Get ComAppend Of hoSbHtml "<html><head>" + (character(13)) + (character(10)) To iSuccess
    Get ComAppend Of hoSbHtml '<meta http-equiv="Content-Type" content="text/html; charset=utf-8">' + (character(13)) + (character(10)) To iSuccess
    Get ComAppend Of hoSbHtml "  </head>" + (character(13)) + (character(10)) To iSuccess
    Get ComAppend Of hoSbHtml '  <body bgcolor="#FFFFFF" text="#000000">' + (character(13)) + (character(10)) To iSuccess
    Get ComAppend Of hoSbHtml '    <p>This is a test.&nbsp; <img src="cid:CONTENT_ID" height="20" width="20"></p>' + (character(13)) + (character(10)) To iSuccess
    Get ComAppend Of hoSbHtml "  </body>" + (character(13)) + (character(10)) To iSuccess
    Get ComAppend Of hoSbHtml "</html>" + (character(13)) + (character(10)) To iSuccess
    Get ComGetAsString Of hoSbContentId To sTemp1
    Get ComReplace Of hoSbHtml "CONTENT_ID" sTemp1 To iNumReplacements

    // Create the HTML MIME part.
    Get Create (RefClass(cComChilkatMime)) To hoHtmlMime
    If (Not(IsComObjectCreated(hoHtmlMime))) Begin
        Send CreateComObject of hoHtmlMime
    End
    Get ComGetAsString Of hoSbHtml To sTemp1
    Get ComSetBodyFromHtml Of hoHtmlMime sTemp1 To iSuccess
    Set ComEncoding Of hoHtmlMime To "8bit"
    Set ComCharset Of hoHtmlMime To "utf-8"

    // Load our JPG image from a file.
    Get Create (RefClass(cComCkFileAccess)) To hoFac
    If (Not(IsComObjectCreated(hoFac))) Begin
        Send CreateComObject of hoFac
    End

    Get ComReadEntireFile Of hoFac "qa_data/jpg/starfish20.jpg" To hoJpgBytes

    // Create an image/jpeg MIME part.
    Get Create (RefClass(cComChilkatMime)) To hoJpgMime
    If (Not(IsComObjectCreated(hoJpgMime))) Begin
        Send CreateComObject of hoJpgMime
    End
    Get ComSetBodyFromBinary Of hoJpgMime vJpgBytes To iSuccess
    // Setting the following properties has the effect of adding
    // the Content-Type, Content-Transfer-Encoding, and Content-Disposition header fields.
    // These header fields could also be set via the SetHeaderField method, in which case
    // the values of the affected properties would be updated.
    Set ComContentType Of hoJpgMime To "image/jpeg"
    Set ComName Of hoJpgMime To "starfish20.jpg"
    Set ComEncoding Of hoJpgMime To "base64"
    Set ComDisposition Of hoJpgMime To "inline"
    Set ComFilename Of hoJpgMime To "starfish20.jpg"

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbContentIdHdr
    If (Not(IsComObjectCreated(hoSbContentIdHdr))) Begin
        Send CreateComObject of hoSbContentIdHdr
    End
    Get ComAppend Of hoSbContentIdHdr "<CONTENT_ID>" To iSuccess
    Get ComGetAsString Of hoSbContentId To sTemp1
    Get ComReplace Of hoSbContentIdHdr "CONTENT_ID" sTemp1 To iNumReplacements
    Get ComGetAsString Of hoSbContentIdHdr To sTemp1
    Get ComSetHeaderField Of hoJpgMime "Content-ID" sTemp1 To iSuccess

    // Add both parts as children of the multipart/related
    Get pvComObject of hoHtmlMime to vHtmlMime
    Get ComAppendPart Of hoMime vHtmlMime To iSuccess
    Get pvComObject of hoJpgMime to vJpgMime
    Get ComAppendPart Of hoMime vJpgMime To iSuccess
    Get ComGetMime Of hoMime To sTemp1
    Showln sTemp1

    // --------------------------------------------------------------
    // --------------------------------------------------------------
    // This example builds the following MIME message.  The boundary
    // and Content-ID strings contain random data and will be different.  

    // Content-Type: multipart/related; boundary="------------A940F1230E6F0105F03DB2CB"
    // Subject: Test HTML email with JPG image.
    // 
    // --------------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-Transfer-Encoding: base64
    // Content-Type: image/jpeg; name="starfish20.jpg"
    // Content-Disposition: inline; filename="starfish20.jpg"
    // Content-ID: <part1.E16AE3B4.1505C436@chilkatsoft.com>
    // 
    // /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--
    // 


End_Procedure