Xbase++

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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LOCAL nSuccess
LOCAL oMime
LOCAL cMimeText

nSuccess := 0

//  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.

oMime := CreateObject("Chilkat.Mime")

//  Establish the content headers first.
nSuccess := oMime:SetBodyFromPlainText("initial")
IF (nSuccess == 0)
    ? oMime:LastErrorText
    oMime:destroy()
    RETURN
ENDIF

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

cMimeText := oMime:GetMime()
IF (oMime:LastMethodSuccess == 0)
    ? oMime:LastErrorText
    oMime:destroy()
    RETURN
ENDIF

? cMimeText

oMime:destroy()