Tcl

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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Tcl


load ./chilkat.dll

set success 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.

set mime [new_CkMime]

#  Establish the content headers first.
set success [CkMime_SetBodyFromPlainText $mime "initial"]
if {$success == 0} then {
    puts [CkMime_lastErrorText $mime]
    delete_CkMime $mime
    exit
}

#  Replace just the body text, keeping the existing Content-Type and encoding.
CkMime_SetBody $mime "This is the replacement body text."

set mimeText [CkMime_getMime $mime]
if {[CkMime_get_LastMethodSuccess $mime] == 0} then {
    puts [CkMime_lastErrorText $mime]
    delete_CkMime $mime
    exit
}

puts "$mimeText"

delete_CkMime $mime