(Swift 2) Create MIME Containing XML

Calls SetBodyFromXml to load XML into the MIME body. Also sets the Content-Type header to "text/xml", and the Content-Transfer-Encoding to an appropriate transfer encoding based on the characters found in the XML.

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let mime = CkoMime()

    // Add a few header fields:
    var success: Bool = mime.AddHeaderField("Description", value: "this is a test")
    success = mime.AddHeaderField("MyId", value: "123")

    var xmlData: String? = "<something>123</something>"

    // Set the mime body via SetBodyFromXml.  This also
    // has the intended side-effect of adding the Content-Type
    // and Content-Transfer-Encoding headers.
    success = mime.SetBodyFromXml(xmlData)

    print("\(mime.GetMime())")

    // The MIME should look like this:

    // Description: this is a test
    // MyId: 123
    // Content-Type: text/xml; 
    // Content-Transfer-Encoding: 7bit
    // 
    // <something>123</something>

    // Note: The Content-Transfer-Encoding may be changed.
    // For example, to use "base64", do this:
    mime.Encoding = "base64"

    // Show the MIME again, this time using the base64 
    // transfer encoding:
    print("\(mime.GetMime())")

    // It should look like this:

    // Description: this is a test
    // MyId: 123
    // Content-Type: text/xml; 
    // Content-Transfer-Encoding: base64
    // 
    // PHNvbWV0aGluZz4xMjM8L3NvbWV0aGluZz4=

}