Rust

Check if an FTP Listing Entry is a Directory

Demonstrates the Chilkat Ftp2.GetIsDirectory method, which returns whether a cached directory-listing entry is a directory. The only argument is a zero-based index. An invalid index returns false.

Background: Distinguishing directories from files is the first thing most listing code needs — to render a folder tree, to decide whether to recurse, or to apply different handling. This reads the type from the cached listing, so it is a local lookup rather than a server query. Reliability depends on the server's listing format conveying the type, which the common Unix and MLSD formats do.

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Rust


// Demonstrates the Ftp2.GetIsDirectory method, which returns whether a cached directory-listing
// entry is a directory.  The only argument is a zero-based index into the current listing.

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();
    if ftp.get_is_directory(i) {
        println!("[DIR]  {}", name);
    } else {
        println!("       {}", name);
    }

}

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