Swift

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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Swift


func chilkatTest() {
    var success: Bool = 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.

    let mime = CkoMime()!

    //  Establish the content headers first.
    success = mime.setBody(fromPlainText: "initial")
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

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

    var mimeText: String? = mime.getMime()
    if mime.lastMethodSuccess == false {
        print("\(mime.lastErrorText!)")
        return
    }

    print("\(mimeText!)")

}