Book Image

Rust Programming By Example

By : Guillaume Gomez, Antoni Boucher
Book Image

Rust Programming By Example

By: Guillaume Gomez, Antoni Boucher

Overview of this book

Rust is an open source, safe, concurrent, practical language created by Mozilla. It runs blazingly fast, prevents segfaults, and guarantees safety. This book gets you started with essential software development by guiding you through the different aspects of Rust programming. With this approach, you can bridge the gap between learning and implementing immediately. Beginning with an introduction to Rust, you’ll learn the basic aspects such as its syntax, data types, functions, generics, control flows, and more. After this, you’ll jump straight into building your first project, a Tetris game. Next you’ll build a graphical music player and work with fast, reliable networking software using Tokio, the scalable and productive asynchronous IO Rust library. Over the course of this book, you’ll explore various features of Rust Programming including its SDL features, event loop, File I/O, and the famous GTK+ widget toolkit. Through these projects, you’ll see how well Rust performs in terms of concurrency—including parallelism, reliability, improved performance, generics, macros, and thread safety. We’ll also cover some asynchronous and reactive programming aspects of Rust. By the end of the book, you’ll be comfortable building various real-world applications in Rust.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
3
Events and Basic Game Mechanisms
Index

File transfer protocol


The file transfer protocol (FTP) was created in 1971. Its final RFC is 959. If you're curious, you can read more about it at  https://tools.ietf.org/html/rfc959.

Being an old protocol, a few commands don't have clear specifications, so some alternative specifications (that are more or less official) have been written in order to fill those blanks. We'll go back to them when writing the server.

Another important point to note is that FTP uses TCP connections.

Now that we've quickly introduced you to FTP, let's see how it works.

Introduction to FTP

A client connects to a server and then sends commands to the server. Each command receives an answer from the server with either a success or failure.

For example, the client will send the PWD command to the server:

=> PWD\r\n
<= 257 "/"\r\n

Here, the server answered 257 (which literally means pathname created) and then gave the current working directory the client is in (which is "/", in this case).

As you can see, every command...