(Lianja) Build a multipart/related MIME Message

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

Chilkat Lianja Extension Download

Chilkat Lianja Extension

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

// Start with an empty MIME object...
loMime = createobject("CkMime")

// Initialize it as multipart/related.
loMime.NewMultipartRelated()

// Set a top-level MIME header field.
loMime.SetHeaderField("Subject","Test HTML email with JPG image.")

// 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.
loCrypt = createobject("CkCrypt2")
loCrypt.EncodingMode = "hex"

loSbContentId = createobject("CkStringBuilder")
loSbContentId.Append("part1.")
loSbContentId.Append(loCrypt.GenRandomBytesENC(4))
loSbContentId.Append(".")
loSbContentId.Append(loCrypt.GenRandomBytesENC(4))
loSbContentId.Append("@chilkatsoft.com")

// Create the HTML body.
loSbHtml = createobject("CkStringBuilder")
loSbHtml.Append("<html><head>" + Chr(13) + Chr(10))
loSbHtml.Append('<meta http-equiv="Content-Type" content="text/html; charset=utf-8">' + Chr(13) + Chr(10))
loSbHtml.Append("  </head>" + Chr(13) + Chr(10))
loSbHtml.Append('  <body bgcolor="#FFFFFF" text="#000000">' + Chr(13) + Chr(10))
loSbHtml.Append('    <p>This is a test.&nbsp; <img src="cid:CONTENT_ID" height="20" width="20"></p>' + Chr(13) + Chr(10))
loSbHtml.Append("  </body>" + Chr(13) + Chr(10))
loSbHtml.Append("</html>" + Chr(13) + Chr(10))
lnNumReplacements = loSbHtml.Replace("CONTENT_ID",loSbContentId.GetAsString())

// Create the HTML MIME part.
loHtmlMime = createobject("CkMime")
loHtmlMime.SetBodyFromHtml(loSbHtml.GetAsString())
loHtmlMime.Encoding = "8bit"
loHtmlMime.Charset = "utf-8"

// Load our JPG image from a file.
loFac = createobject("CkFileAccess")

loJpgBytes = loFac.ReadEntireFile("qa_data/jpg/starfish20.jpg")

// Create an image/jpeg MIME part.
loJpgMime = createobject("CkMime")
loJpgMime.SetBodyFromBinary(loJpgBytes)
// 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.
loJpgMime.ContentType = "image/jpeg"
loJpgMime.Name = "starfish20.jpg"
loJpgMime.Encoding = "base64"
loJpgMime.Disposition = "inline"
loJpgMime.Filename = "starfish20.jpg"

loSbContentIdHdr = createobject("CkStringBuilder")
loSbContentIdHdr.Append("<CONTENT_ID>")
lnNumReplacements = loSbContentIdHdr.Replace("CONTENT_ID",loSbContentId.GetAsString())
loJpgMime.SetHeaderField("Content-ID",loSbContentIdHdr.GetAsString())

// Add both parts as children of the multipart/related
loMime.AppendPart(loHtmlMime)
loMime.AppendPart(loJpgMime)
? loMime.GetMime()

// --------------------------------------------------------------
// --------------------------------------------------------------
// 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--
// 


release loMime
release loCrypt
release loSbContentId
release loSbHtml
release loHtmlMime
release loFac
release loJpgMime
release loSbContentIdHdr