Rust

Create a multipart/related MIME Entity

Demonstrates the Chilkat Mime.NewMultipartRelated method, which initializes the object as an empty multipart/related entity. It takes no arguments; the primary part and its related resources are then appended.

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: multipart/related ties a primary part to the resources it references — most commonly an HTML body and the inline images it embeds via cid: references. Unlike a plain attachment, a related image is displayed within the message rather than listed separately. The HTML part comes first, followed by each referenced resource with a matching Content-ID.

Chilkat Rust Downloads

Download Chilkat for Rust

Rust


// Demonstrates the Mime.NewMultipartRelated method, which initializes the object as an empty
// multipart/related entity, clearing any existing content.  It takes no arguments.

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

if mime.new_multipart_related().is_err() {
    println!("{}", mime.last_error_text());
    return;
}

// multipart/related groups a primary part with the resources it references, such as an HTML body
// and the inline images it displays.
let html_part = chilkat::Mime::new();
if html_part.set_body_from_html("<html><body><img src=\"cid:logo\"></body></html>").is_err() {
    println!("{}", html_part.last_error_text());
    return;
}

if mime.append_part(&html_part).is_err() {
    println!("{}", mime.last_error_text());
    return;
}

if mime.append_part_from_file("qa_data/logo.png").is_err() {
    println!("{}", mime.last_error_text());
    return;
}

println!("Number of parts: {}", mime.num_parts());