Rocket - The Rust Web Framework - Hello World

Rocket - The Rust Web Framework - Hello World

In this article, we will learn how to build a simple web application using Rocket, a web framework for Rust.

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Rocket

Rocket is a web framework for Rust that makes writing fast, secure web applications simple without sacrificing flexibility, usability, or type safety.

Rocket is type-safe, which means that many kinds of errors are caught at compile time. Rocket is also fast, with a focus on performance and speed.

Rocket is secure, with built-in support for common security vulnerabilities. Rocket is flexible, with a powerful routing system that allows you to define routes using a simple, intuitive syntax.

Rocket is also easy to use, with a clean, well-documented API that makes it easy to start.

Let's look at how to get started with Rocket and build a simple web application.

Getting Started

Create a new Rust project using Cargo, enter the project directory, and open the project in your favorite code editor.

cargo new hello-rocket
cd hello-rocket
code .

Add the Rocket crate to your Cargo.toml file.

[dependencies]
rocket = "0.5.1"

Then, replace the content of src/main.rs with the following code.

#[macro_use] extern crate rocket;

#[get("/")]
fn index() -> &'static str {
    "Hello, Rocket 🚀"
}

#[launch]
fn rocket() -> _ {
    rocket::build().mount("/", routes![index])
}

Now you can run the application using the following command.

cargo run

And you should see the following output.

Now visit http://localhost:8000 in your web browser, and you should see the following message.

That's it! You've just built a simple web application using Rocket.

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Conclusion

Rocket is a powerful web framework for Rust that makes writing fast, secure web applications simple.

In this article, we've covered the basics of Rocket and how to get started with building a simple web application.

I hope you found this article helpful! If you have any questions or comments, please leave them below.

Have fun coding with Rust.

Francesco

Comments

[Charles F. Munat]

How can you write an entire article about Rocket and not include an obvious link to the Rocket website?

It's rocket.rs/

[Francesco Ciulla]

added, thanks for letting me know.

[Fyodor]

FWIW, building a rocket with rust is a bad idea… not sure how this metaphor found its place anyways…

[Mohammad Husain]

Still hasn’t reached 1.0, wow! How old is it again?

[Francesco Ciulla]

I think the first version has been released in 2016. It has very high standads, so it might still take a while and that's fine