Introduction to FTP and TFTP

Another common application layer protocol is the File Transfer Protocol (FTP). This is a text-based protocol, where the server and clients exchange text commands to upload and download files. The Rust ecosystem has a crate called rust-ftp to interact with FTP servers programmatically. Let us look at an example of its use. We set up our project using Cargo:

$ cargo new --bin ftp-example

Our Cargo.toml should look like this:

[package]
name = "ftp-example"
version = "0.1.0"
authors = ["Foo<[email protected]>"]

[dependencies.ftp]
version = "2.2.1"

For this example to work, we will need a running FTP server somewhere. Once we have set that up and made sure a regular FTP client can connect to it, we can move on to our main code:

// ch5/ftp-example/src/main.rs

extern crate ftp;

use std::str;
use std::io::Cursor;
use ftp::{FtpStream, FtpError};

fn run_ftp(addr: &str, user: &str, pass: &str) -> Result<(), FtpError> {
    let mut ftp_stream = FtpStream...