Check if a MIME Part is HTML

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Demonstrates the Chilkat Mime.IsHtml method, which returns whether the Content-Type is exactly text/html. It takes no arguments and applies to the current part.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: Finding the HTML part is the common goal when rendering a message richly — it is the formatted version a mail client prefers. In a multipart/alternative you would locate it with this predicate and fall back to the plain-text part when it is absent.

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    success := false

    //  Demonstrates the Mime.IsHtml method, which returns whether the Content-Type is text/html.  It takes no arguments and applies to the current
    //  part.  This example iterates the parts of a multipart message and reports which ones match.

    mime := chilkat.NewMime()
    success = mime.LoadMimeFile("qa_data/multipart_message.eml")
    if success == false {
        fmt.Println(mime.LastErrorText())
        mime.DisposeMime()
        return
    }

    n := mime.NumParts()
    part := chilkat.NewMime()
    var i int
    for i = 0; i <= n - 1; i++ {
        success = mime.PartAt(i,part)
        if success == false {
            fmt.Println(mime.LastErrorText())
            mime.DisposeMime()
            part.DisposeMime()
            return
        }

        if part.IsHtml() {
            fmt.Println("Part ", i, " (", part.ContentType(), ") is HTML.")
        }

    }


    mime.DisposeMime()
    part.DisposeMime()