Rust

Get an FTP Listing Entry's Last-Modified Time

Demonstrates the Chilkat Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a cached directory-listing entry as an RFC 822 date-time string. The only argument is a zero-based index.

Background: The last-modified time is the workhorse timestamp: it updates whenever a file's contents change and is what sync and mirror logic compares to decide whether a file needs re-transferring. It is the most reliably reported of the three across FTP servers, and the RFC 822 string carries a timezone so comparisons are well defined.

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Rust


// Demonstrates the Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a
// cached directory-listing entry as an RFC 822 date-time string.  The only argument is a
// zero-based index.

let ftp = chilkat::Ftp2::new();

ftp.set_hostname("ftp.example.com");
ftp.set_username("myFtpLogin");

// Normally you would not hard-code the password in source.  You should instead obtain it
// from an interactive prompt, environment variable, or a secrets vault.
ftp.set_password("myPassword");

if ftp.connect().is_err() {
    println!("{}", ftp.last_error_text());
    return;
}

if ftp.change_remote_dir("public_html").is_err() {
    println!("{}", ftp.last_error_text());
    return;
}

// GetDirCount retrieves the directory listing on the first call and returns the number of
// entries.  A negative return indicates failure.
let n = ftp.get_dir_count();
if n < 0 {
    println!("{}", ftp.last_error_text());
    return;
}

for i in 0..n {
    let name = ftp.get_filename(i).unwrap_or_default();

    // The value is an RFC 822 string such as "Fri, 21 Nov 1997 09:55:06 -0600".
    let last_modified = ftp.get_last_modified_time_str(i).unwrap_or_default();
    println!("{}  modified {}", name, last_modified);
}

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