Tonic + Protocheck + Svelte

This is a full example of how to set up a fullstack application where validation is done using protovalidate annotations, enforced by protocheck on the backend and protovalidate-es on the frontend.

Backend

The backend consists of a server that uses Tonic to listen for grpc requests (with a grpc-web layer provided by Tonic-web), while using Axum to serve normal http REST endpoints.

protocheck is used to validate incoming grpc requests.

Frontend

The frontend consists of a very simple Sveltekit app that uses protovalidate-es to validate outgoing messages and connect-es to send them via grpc-web to the backend.

It also uses Tanstack Form to provide responsive feedback from validation errors.

How To Test

1. Clone the repo
2. Run cargo run to start the server
3. Install js dependencies with pnpm install
4. Run pnpm run dev to start the client
5. Send a request from the client and check the validation outcome