Rust

Get an Attachment's Bytes into a BinData

Demonstrates the Chilkat Email.GetAttachmentBd method, which copies an attachment's binary data into a BinData object. The first attachment is at index 0. This example adds an attachment and copies its bytes into a BinData, printing the byte count.

Background: This is the safe, binary way to extract an attachment — the counterpart to the text-oriented GetAttachmentString. Because attachments are often binary (PDFs, images, archives), copying the raw bytes into a BinData preserves them exactly, ready to write to a file, hash, or pass to another API without any charset conversion that could corrupt the data.

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Rust


// Demonstrates the GetAttachmentBd method, which copies an attachment's binary data into a
// BinData object.  The first attachment is at index 0.

let email = chilkat::Email::new();
email.set_subject("GetAttachmentBd example");

let _ = email.add_string_attachment("notes.txt", "Some notes stored in the attachment.");

// Copy the first attachment's binary data into a BinData object.
let bd = chilkat::BinData::new();
if email.get_attachment_bd(0, &bd).is_err() {
    println!("{}", email.last_error_text());
    return;
}

println!("Attachment size (bytes) = {}", bd.num_bytes());