Xojo Plugin

Set a MIME Body, Preserving Content Headers

Demonstrates the Chilkat Mime.SetBody method, which sets the current part's body while preserving the existing content headers (Content-Type, charset, Content-Transfer-Encoding). The only argument is the body text; it is a void method.

Background: Unlike the SetBodyFrom... methods, which set both the content and the headers that describe it, SetBody replaces only the body text and leaves the existing Content-Type and encoding in place. That is what you want when the media type is already correct and you simply need to swap in new content — updating a templated part, for instance — without re-declaring its type.

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Xojo Plugin

Dim success As Boolean
success = False

//  Demonstrates the Mime.SetBody method, which sets the current part's body while preserving the
//  existing content headers (Content-Type, charset, Content-Transfer-Encoding).  The only argument
//  is the body text.  It is a void method.

Dim mime As New Chilkat.Mime

//  Establish the content headers first.
success = mime.SetBodyFromPlainText("initial")
If (success = False) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

//  Replace just the body text, keeping the existing Content-Type and encoding.
mime.SetBody "This is the replacement body text."

Dim mimeText As String
mimeText = mime.GetMime()
If (mime.LastMethodSuccess = False) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

System.DebugLog(mimeText)