Rust

Serialize MIME to a StringBuilder

Demonstrates the Chilkat Mime.GetMimeSb method, which serializes the complete MIME entity and appends it to a StringBuilder. The only argument is the StringBuilder; existing content is preserved.

Background: Serializing into a StringBuilder avoids creating a new string and is convenient when you are accumulating output or building a larger document. Because it appends, you can assemble several pieces in one buffer. As with GetMime, use the BinData form for content with arbitrary binary bytes.

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Rust


// Demonstrates the Mime.GetMimeSb method, which serializes the complete MIME entity and appends
// it to a StringBuilder.  The only argument is the StringBuilder.

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

if mime.set_body_from_plain_text("Hello, this is the message body.").is_err() {
    println!("{}", mime.last_error_text());
    return;
}

// Append the serialized MIME to a StringBuilder.  Existing content is preserved.
let sb = chilkat::StringBuilder::new();
if mime.get_mime_sb(&sb).is_err() {
    println!("{}", mime.last_error_text());
    return;
}

println!("{}", sb.get_as_string().unwrap_or_default());