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http-keyvalue-counter

README.md

HTTP KeyValue Counter

This is a simple Rust Wasm example that increments a key in a keyvalue store in response to an HTTP request based on the path. This component uses the wasi-http API to receive HTTP requests and the wasi-keyvalue API to interact with a keyvalue store. At runtime we link this component to an implementation of wasi-keyvalue that interacts with Redis.

Prerequisites

  • cargo 1.75
  • wash 0.27.0

Building

wash build

Running with wasmCloud

Ensuring you've built your component with wash build, you can launch wasmCloud and deploy the full hello world application with the following commands. Once the application reports as Deployed in the application list, you can use curl to send a request to the running HTTP server.

# Start redis locally
redis-server &
# Start wasmCloud
wash up -d
wash app deploy ./wadm.yaml
wash app list
curl http://127.0.0.1:8080/counter

Adding Capabilities

To learn how to extend this example with additional capabilities, see the Adding Capabilities section of the wasmCloud documentation.