Book Image

Rust Web Programming - Second Edition

By : Maxwell Flitton
Book Image

Rust Web Programming - Second Edition

By: Maxwell Flitton

Overview of this book

Are safety and high performance a big concern for you while developing web applications? With this practical Rust book, you’ll discover how you can implement Rust on the web to achieve the desired performance and security as you learn techniques and tooling to build fully operational web apps. In this second edition, you’ll get hands-on with implementing emerging Rust web frameworks, including Actix, Rocket, and Hyper. It also features HTTPS configuration on AWS when deploying a web application and introduces you to Terraform for automating the building of web infrastructure on AWS. What’s more, this edition also covers advanced async topics. Built on the Tokio async runtime, this explores TCP and framing, implementing async systems with the actor framework, and queuing tasks on Redis to be consumed by a number of worker nodes. Finally, you’ll go over best practices for packaging Rust servers in distroless Rust Docker images with database drivers, so your servers are a total size of 50Mb each. By the end of this book, you’ll have confidence in your skills to build robust, functional, and scalable web applications from scratch.
Table of Contents (27 chapters)
Free Chapter
Part 1:Getting Started with Rust Web Development
Part 2:Processing Data and Managing Displays
Part 3:Data Persistence
Part 4:Testing and Deployment
Part 5:Making Our Projects Flexible
Part 6:Exploring Protocol Programming and Async Concepts with Low-Level Network Applications

Connecting our app to PostgreSQL

In the preceding section, we managed to connect to the PostgreSQL database using the terminal. However, we now need our app to manage the reading and writing to the database for our to-do items. In this section, we will connect our application to the database running in Docker. To connect, we must build a function that establishes a connection and then returns it. It must be stressed that there is a better way to manage the database connection and configuration, which we will cover at the end of the chapter. For now, we will implement the simplest database connection to get our application running. In the src/ file, we define the function with the following code:

use diesel::prelude::*;
use diesel::pg::PgConnection;
use dotenv::dotenv;
use std::env;
pub fn establish_connection() -> PgConnection {
    let database_url = env::var("DATABASE_URL")