Template Rendering in Rust

Template Rendering in Rust

Learn how to do safe, performant template rendering in Rust using the example of a server-side rendered web application.

Learn how to do safe, performant template rendering in Rust using the example of a server-side rendered web application.

In this tutorial, we’ll examine the old-school way of writing web applications using templates with all the rendering happening on the server side.

The Rust ecosystem for template engines is surprisingly robust, so we have a choice between several viablew options. For this tutorial, I chose to use Askama, since it seems like one of the most mature engines. Other options include Yarte, Tera and SailFish, among others.

Askama is based on the widely used Jinja project, so if you’ve worked with that before, the syntax will be somewhat familiar.

Additionally, Askama creates actual Rust code from your templates, which means the templates are checked at compile time and rendering is lightning fast. This comes at the price of being able to dynamically change and reload the templates at runtime. I’m sure someone will implement some nifty workaround eventually, but as of this writing, it doesn’t work.

Askama’s API is straightforward and, being based on Jinja, quite powerful.

To see this templating exercise in action, we’ll create a simple bookstore application with CRUD functionality using a warp web server and purely serverside-rendered templates.


To follow along, you’ll need a reasonably recent Rust installation (1.39+) and a web browser.

First, create a new Rust project.

cargo new rust-templating-example
cd rust-templating-example

Next, edit the Cargo.toml file and add the dependencies you’ll need.

tokio = { version = "0.2", features = ["macros", "rt-threaded"] }
warp = "0.2"
thiserror = "1.0"
askama = "0.8"
serde = {version = "1.0", features = ["derive"] }
chrono = { version = "0.4", features = ["serde"] }
uuid = { version = "0.8", features = ["serde", "v4"] }

We need warp and tokio for the web server and Serde for deserializing the incoming request payload. As mentioned above, we’ll use Askama for templating and we’ll also add uuid, chrono, and thiserror for handling unique IDs, dates, and errors, respectively.

rust web-development developer

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