Classic ASP

Convert a MIME Entity to multipart/alternative

Demonstrates the Chilkat Mime.ConvertToMultipartAlt method, which wraps the current entity in a new outer multipart/alternative, making the original the first child. It takes no arguments.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: Use this to add an alternate rendering to an existing message — for example, promoting a plain-text message so an HTML version can be added alongside it. The original content becomes the first (least-preferred) alternative, and you append the richer representation after it. As with the mixed conversion, message-level headers move to the new outer entity.

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

set mime = Server.CreateObject("Chilkat.Mime")
success = mime.LoadMimeFile("qa_data/message.eml")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( mime.LastErrorText) & "</pre>"
    Response.End
End If

'  Wrap the current entity in a new outer multipart/alternative entity.  The original entity
'  becomes the first child, ready for an alternate representation to be added.
success = mime.ConvertToMultipartAlt()
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( mime.LastErrorText) & "</pre>"
    Response.End
End If

'  Add an alternative representation of the same content.
set htmlPart = Server.CreateObject("Chilkat.Mime")
success = htmlPart.SetBodyFromHtml("<html><body>HTML alternative.</body></html>")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( htmlPart.LastErrorText) & "</pre>"
    Response.End
End If

success = mime.AppendPart(htmlPart)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( mime.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "Number of parts: " & mime.NumParts) & "</pre>"

%>
</body>
</html>