Project: Building a Simple Web Application

Apply what you've learned in Rust by building a simple web application. This project will cover setup, logic implementation, and finalization.

By Kevin McAleer,    2 Minutes

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Now that you’re familiar with Rust’s fundamentals, its concurrency model, error handling, and ecosystem, it’s time to put your knowledge into practice by building a simple web application. This project will guide you through setting up your project environment, implementing the application logic, and finalizing your project.

Learning Objectives

  • Set up a Rust project for a web application.
  • Implement basic web server logic using Rust.
  • Finalize and run your web application.

Setting up

First, create a new Rust project:

cargo new rust_web_app
cd rust_web_app

Then, add necessary dependencies in your Cargo.toml:

warp = "0.3"
tokio = { version = "1", features = ["full"] }
serde = { version = "1.0", features = ["derive"] }

We’ll use warp for the web server framework, tokio for asynchronous runtime, and serde for serializing and deserializing the JSON data.

Implementing Logic

Create a new file in the src directory called Here, you will define your routes and request handlers. Start with a simple health check endpoint:

use warp::Filter;

async fn health_check() -> Result<impl warp::Reply, warp::Rejection> {

pub fn routes() -> impl Filter<Extract = impl warp::Reply, Error = warp::Rejection> + Clone {

In your, set up the server to run:

use warp::Filter;

mod server;

async fn main() {
    let routes = server::routes();

    warp::serve(routes).run(([127, 0, 0, 1], 3030)).await;

Finalizing the Project

Before running your application, review the code to ensure it follows best practices and that you’ve handled potential errors. Run your project:

cargo run

Test your application by visiting in a web browser or using a tool like curl:



In this project, you’ve built a simple web application using Rust. You set up the project environment, implemented a basic web server, and learned how to run and test your Rust web application. This project serves as a foundation for building more complex web applications with Rust.

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