Enforcing Client Identification Headers via Rhai Scripting

This example repo provides a minimal demonstration of using a Rhai script to validate that incoming requests contain the apollographql-client-name and apollographql-client-version headers used for metrics collection with GraphOS.

Running the Example

1. Run the subgraph from the /subgraph directory with npm run dev
2. In the /router directory, download the router by running ./download_router.sh
3. In the /router directory, compose the schema by running ./create_local_schema.sh
4. In the /router directory, run the router by running ./start_router.sh

Now if you run this code in the browser (http://127.0.0.1:4000/), you can send through a graphql request and observe that without the client headers, an error will be thrown. Note that this example also enforces the client name to be apollo-client or retail-website.

Code Highlights

The most notable portion of this code is found in the /router directory. In the router-config.yaml, rhai scripts are enabled and it points to the rhai/main.rhai script as the entry point.