Rust

Check if a MIME Part is HTML

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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Rust


// 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.

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

let n = mime.num_parts();
let part = chilkat::Mime::new();
for i in 0..n {
    if mime.part_at(i, &part).is_err() {
        println!("{}", mime.last_error_text());
        return;
    }

    if part.is_html() {
        println!("Part {} ({}) is HTML.", i, part.content_type());
    }

}