Rust

Fetch an IMAP Message's MIME into a BinData

Demonstrates the Chilkat Imap.FetchSingleBd method, which downloads one message's MIME bytes into a BinData object. If the second argument (bUid) is true, the first argument is a UID; otherwise it is a sequence number. This example downloads message 1's MIME into a BinData and prints the byte count.

Background: This is the binary counterpart to FetchSingleAsMime (which returns a string). A BinData holds raw bytes, so it preserves the message exactly — the right choice when you plan to write the MIME straight to a file, hash it, or hand it to an API expecting a byte buffer, with no charset conversion that could alter binary content.

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Rust


// Demonstrates the Imap.FetchSingleBd method, which downloads one message's MIME bytes into a
// BinData object.  If the 2nd argument (bUid) is true, the 1st argument is a UID; otherwise
// it is a sequence number.

let imap = chilkat::Imap::new();

imap.set_ssl(true);
imap.set_port(993);

if imap.connect("imap.example.com").is_err() {
    println!("{}", imap.last_error_text());
    return;
}

if imap.login("user@example.com", "myPassword").is_err() {
    println!("{}", imap.last_error_text());
    return;
}

if imap.select_mailbox("Inbox").is_err() {
    println!("{}", imap.last_error_text());
    return;
}

// Download message sequence number 1's MIME bytes into a BinData.  bUid = false.
let bd_mime = chilkat::BinData::new();
if imap.fetch_single_bd(1, false, &bd_mime).is_err() {
    println!("{}", imap.last_error_text());
    return;
}

println!("MIME size (bytes) = {}", bd_mime.num_bytes());

if imap.disconnect().is_err() {
    println!("{}", imap.last_error_text());
    return;
}