Datastar Rust SDK

An implementation of the Datastar SDK in Rust with framework integration for Axum, Rocket, and Warp.

Rust web frameworks own SSE stream lifecycle and backpressure, so this SDK intentionally returns framework-native events instead of providing a ServerSentEventGenerator.

Rama has its own SDK implementation defined as a Rama module for Datastar as can be seen in action in this example.

Usage

Runnable examples for every supported framework can be found in examples.

Long-lived streams

A long-lived SSE handler can receive updates from any number of application tasks. Publish server-side state changes through channels such as tokio::sync::watch or tokio::sync::broadcast, then wait on all receivers in the handler with tokio::select!. Requests that change state only need to publish an update; the existing SSE response remains open and sends the corresponding Datastar event.

The axum-watch example demonstrates three independent watch channels feeding one SSE response. The rocket-hello-channel example shows the same basic pattern with Rocket.