Rust

Get a Digest Message as an Email Object

Demonstrates the Chilkat Email.GetDigestEmail method, which copies the Nth digest email contained within a multipart/digest into another Email object. The first digest is at index 0; the NumDigests property gives the count. This example loads a digest email and lists each bundled message's subject.

Background: A multipart/digest packs many separate emails into one carrier message — historically used by mailing lists to send a single daily bundle of that day's posts. GetDigestEmail unpacks each member into a full Email object so it can be read or processed individually. This differs from GetAttachedEmail, which extracts messages attached to an ordinary email rather than the members of a digest.

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Rust


// Demonstrates the GetDigestEmail method, which copies the Nth digest email contained
// within a multipart/digest into another Email object.  The first digest is at index 0;
// use the NumDigests property for the count.

let email = chilkat::Email::new();

if email.load_eml("qa_data/eml/digest.eml").is_err() {
    println!("{}", email.last_error_text());
    return;
}

let n = email.num_digests();
println!("NumDigests = {}", n);

// Retrieve each bundled message as its own Email object.
let digest_email = chilkat::Email::new();
for i in 0..n {
    let _ = email.get_digest_email(i, &digest_email).is_ok();
    println!("Digest {} subject: {}", i, digest_email.subject());
}

// Note: The path "qa_data/..." is a relative local filesystem path,
// relative to the current working directory of the running application.