In a previous post on this blog, we covered how to create a Rust web service using Actix and Diesel. This time around, we’ll create a lightweight, fully asynchronous web service using the warp web framework and tokio-postgres.

Warp is based on the well-known and battle-tested hyper HTTP library, which provides a robust and very fast basis. Another cool feature of warp is it’s filter system, a functional approach to composing web applications.

Essentially, filters are just functions that can be composed together. In warp, they’re used for everything from routing, to middleware, to passing values to handlers. See warp’s release post for a deeper dive. In this tutorial, you’ll see some filters in action and we’ll demonstrate how you can write one yourself.

#rust #web-service