python-wasm-component

Build a wasm component from a python http app

1. Create a wit directory with a world that conforms to an http trigger which essentially means you need a world that exports a wasi http incoming handler type

2. Generate bindings using componentize-py. By default, bindings will be created in a directory with the same name as the world you are targeting (replacing hyphens with underscores).

componentize-py -d wit -w http-app bindings .

3. Create the http handler in app.py using imports from the bindings that were generated.

4. Run spin up --build to build and run your component. Under the hood spin build is running componentize-py -d wit -w http-app componentize app -o app.wasm which builds you WASM component and outputs it as app.wasm.

5. Test using curl

$ curl -i localhost:3000
HTTP/1.1 200 OK
hello: WORLD
content-length: 0
date: Thu, 02 Nov 2023 22:25:33 GMT

Enjoy!