Rust

Enable FTP MODE Z Compression

Demonstrates the Chilkat Ftp2.SetModeZ method, which enables MODE Z compression for subsequent data connections. It takes no arguments. Call it after connecting and only when the HasModeZ property is true.

Background: MODE Z compresses data on the fly (using zlib) as it crosses the wire, which can meaningfully speed up transfers of compressible content — text, HTML, logs — over a slow link. It is a server extension, so check HasModeZ first and expect it to be unavailable on many servers. There is little benefit for already-compressed data such as images or archives, where the CPU cost of compression buys almost nothing.

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// Demonstrates the Ftp2.SetModeZ method, which enables MODE Z compression for subsequent data
// connections.  It takes no arguments.  Call it after connecting, and only when the HasModeZ
// property indicates the server supports it.

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;
}

// Only enable compression if the server advertises MODE Z support.
if ftp.has_mode_z() {
    if ftp.set_mode_z().is_err() {
        println!("{}", ftp.last_error_text());
        return;
    }

    println!("MODE Z compression enabled.");
} else {
    println!("The server does not support MODE Z.");
}

// Subsequent uploads, downloads, and listings are transferred compressed.

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