fibonacci-wagi-as: AssemblyScript example of fibonaci using WAGI

WAGI is the easiest way to get started doing cloud-side WASM web apps.

WARNING: This is experimental code put together on a whim. It is not considered production-grade by its developers, neither is it "supported" software. This is a project we wrote to demonstrate another way to use WASI.

DeisLabs is experimenting with many WASM technologies right now. This is one of a multitude of projects (including Krustlet) designed to test the limits of WebAssembly as a cloud-based runtime.

What It Does

This is an example of WAGI. It is written in AssemblyScript, a WebAssembly-oriented dialect of TypeScript/JavaScript.

This example shows a simple fibonacci function exposed over HTTP using WAGI.

Building

• Clone this repo to fibonacci-wagi-as and enter that directory.
• Use npm i to install all dependencies.
• Use npm run asbuild to build a WASM binary.

Configuring and Running

We recommend using the WAGI server to run this module. In your modules.toml for the WAGI server, add the following:

[[module]]
route = "/fibonacci"
module = "/path/to/fibonacci-wagi-as/build/optimized.wasm"

Substitute the correct module path for wherever you cloned this repo.

At that point, you should be able to access this program at http://localhost:3000/fibonacci (Possibly substituting in your own domain and port, depending on the WAGI server).

You can use curl to test:

$  curl -v http://localhost:3000/fibonacci?50
*   Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 3000 (#0)
> GET /fibonacci?50 HTTP/1.1
> Host: localhost:3000
> User-Agent: curl/7.58.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Date: Thu, 29 Apr 2021 13:08:37 GMT
< Content-Type: text/plain
<
fib(50)=12586269025
* Connection #0 to host localhost left intact

You can omit the -v to just see the response body:

$ curl http://localhost:3000/fibonacci?50
fib(50)=12586269025