expectrl

# Cargo.toml
[dependencies]
expectrl = "0.7"

use expectrl::{Regex, Eof, Error, Expect};

fn main() -> Result<(), Error> {
    let mut p = expectrl::spawn("ftp speedtest.tele2.net")?;
    p.expect(Regex("Name \\(.*\\):"))?;
    p.send_line("anonymous")?;
    p.expect("Password")?;
    p.send_line("test")?;
    p.expect("ftp>")?;
    p.send_line("cd upload")?;
    p.expect("successfully changed.\r\nftp>")?;
    p.send_line("pwd")?;
    p.expect(Regex("[0-9]+ \"/upload\""))?;
    p.send_line("exit")?;
    p.expect(Eof)?;

    Ok(())
}

use std::io::stdout;

use expectrl::{
    interact::{actions::lookup::Lookup, InteractSession},
    stream::stdin::Stdin,
    ControlCode, Error, Expect, Regex,
};

fn main() -> Result<(), Error> {
    let mut p = expectrl::spawn("ftp bks4-speedtest-1.tele2.net")?;

    let mut auth = false;
    let mut login_lookup = Lookup::new();
    let mut stdin = Stdin::open()?;

    InteractSession::new(&mut p, &mut stdin, stdout(), &mut auth)
        .set_output_action(move |ctx| {
            if login_lookup
                .on(ctx.buf, ctx.eof, "Login successful")?
                .is_some()
            {
                **ctx.state = true;
                return Ok(true);
            }

            Ok(false)
        })
        .spawn()?;

    stdin.close()?;

    if !auth {
        println!("An authefication was not passed");
        return Ok(());
    }

    p.expect("ftp>")?;
    p.send_line("cd upload")?;
    p.expect("successfully changed.")?;
    p.send_line("pwd")?;
    p.expect(Regex("[0-9]+ \"/upload\""))?;
    p.send(ControlCode::EndOfTransmission)?;
    p.expect("Goodbye.")?;

    Ok(())
}