Rust

Check if a MIME Entity is multipart/alternative

Demonstrates the Chilkat Mime.IsMultipartAlternative method, which returns whether the Content-Type is exactly multipart/alternative. It takes no arguments.

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: Recognizing multipart/alternative matters because its children are the same content in different formats — you display one (usually the last renderable), not all of them. That is the opposite of multipart/mixed, where every child is shown.

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Rust


// Demonstrates the Mime.IsMultipartAlternative method, which returns whether the Content-Type is multipart/alternative.  It takes no arguments.

let mime = chilkat::Mime::new();
if mime.load_mime_file("qa_data/multipart_message.eml").is_err() {
    println!("{}", mime.last_error_text());
    return;
}

if mime.is_multipart_alternative() {
    println!("This is a multipart/alternative entity.");
} else {
    println!("This is not multipart/alternative.");
}