Rust

Get a Summary of the MIME Structure

Demonstrates the Chilkat Mime.GetStructure method, which returns a concise summary of the MIME tree. The only argument selects the format: xml for XML, or text (the default for any other value) for a plain-text outline.

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

Background: A real message can nest multipart containers several levels deep — a multipart/mixed holding a multipart/alternative of text and HTML plus attachments — and GetStructure renders that hierarchy at a glance without the full content. It is the fast way to understand or debug an unfamiliar message's layout, in either a readable text outline or machine-parseable XML.

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Rust


// Demonstrates the Mime.GetStructure method, which returns a concise summary of the MIME tree.
// The only argument selects the output format: "xml" for XML, or "text" (the default) for a
// plain-text outline.

let mime = chilkat::Mime::new();

if mime.load_mime_file("qa_data/multipart_message.eml").is_err() {
    println!("{}", mime.last_error_text());
    return;
}

// Get a human-readable text outline of the MIME structure.
let Ok(structure) = mime.get_structure("text") else {
    println!("{}", mime.last_error_text());
    return;
};

println!("{}", structure);