Xbase++
Build a multipart/related MIME Message

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

Xbase++
LOCAL nSuccess
LOCAL oMime
LOCAL oCrypt
LOCAL oSbContentId
LOCAL oSbHtml
LOCAL nNumReplacements
LOCAL oHtmlMime
LOCAL oFac
LOCAL oJpgMime
LOCAL oSbContentIdHdr

nSuccess := 0

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

//  Start with an empty MIME object...
oMime := CreateObject("Chilkat.Mime")

//  Initialize it as multipart/related.
oMime:NewMultipartRelated()

//  Set a top-level MIME header field.
oMime: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.
oCrypt := CreateObject("Chilkat.Crypt2")
oCrypt:EncodingMode := "hex"

oSbContentId := CreateObject("Chilkat.StringBuilder")
oSbContentId:Append("part1.")
oSbContentId:Append(oCrypt:GenRandomBytesENC(4))
oSbContentId:Append(".")
oSbContentId:Append(oCrypt:GenRandomBytesENC(4))
oSbContentId:Append("@chilkatsoft.com")

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

//  Create the HTML MIME part.
oHtmlMime := CreateObject("Chilkat.Mime")
oHtmlMime:SetBodyFromHtml(oSbHtml:GetAsString())
oHtmlMime:Encoding := "8bit"
oHtmlMime:Charset := "utf-8"

//  Load our JPG image from a file.
oFac := CreateObject("Chilkat.FileAccess")

oJpgBytes := oFac:ReadEntireFile("qa_data/jpg/starfish20.jpg")

//  Create an image/jpeg MIME part.
oJpgMime := CreateObject("Chilkat.Mime")
oJpgMime:SetBodyFromBinary(oJpgBytes)
//  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.
oJpgMime:ContentType := "image/jpeg"
oJpgMime:Name := "starfish20.jpg"
oJpgMime:Encoding := "base64"
oJpgMime:Disposition := "inline"
oJpgMime:Filename := "starfish20.jpg"

oSbContentIdHdr := CreateObject("Chilkat.StringBuilder")
oSbContentIdHdr:Append("<CONTENT_ID>")
nNumReplacements := oSbContentIdHdr:Replace("CONTENT_ID", oSbContentId:GetAsString())
oJpgMime:SetHeaderField("Content-ID", oSbContentIdHdr:GetAsString())

//  Add both parts as children of the multipart/related
oMime:AppendPart(oHtmlMime)
oMime:AppendPart(oJpgMime)
? oMime: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--
//

oMime:destroy()
oCrypt:destroy()
oSbContentId:destroy()
oSbHtml:destroy()
oHtmlMime:destroy()
oFac:destroy()
oJpgMime:destroy()
oSbContentIdHdr:destroy()