Wasm Workers Server

Develop and run serverless applications on WebAssembly 🚀

workers.wasmlabs.dev

Wasm Workers Server (wws) is an open source tool to develop and run serverless applications server on top of WebAssembly. The applications are composed by multiple modules called workers. Each of these tiny modules is in charge of replying to a specific HTTP endpoint in your application.

When you start wws, it loads the existing workers in the given path or remote repository. You can write a worker in different languages like Rust, JavaScript, Go, Ruby and Python. The filenames and folders determine the final routes that will be served. For example, the index.js will reply to the / endpoint.

Getting started (5 minutes)

1. Download and install Wasm Worker Sever:

   curl -fsSL https://workers.wasmlabs.dev/install | bash

2. Create an index.js file with the following content:

   addEventListener("fetch", event => {
     return event.respondWith(
       new Response("Hello from Wasm Workers Server!")
     );
   });

3. Run wws:

   $ wws .
   ⚙️  Preparing the project from: .
   ⚙️  Loading routes from: .
   ⏳ Loading workers from 1 routes...
   ✅ Workers loaded in 141.613666ms.
       - http://127.0.0.1:8080/
         => ./index.js
   🚀 Start serving requests at http://127.0.0.1:8080

4. Access to http://127.0.0.1:8080.

Congrats! You just created your first worker 🎉. From this point, you can explore the different examples and guides:

• +20 Worker examples
• Guides to develop workers in different languages:
  • Rust workers
  • Python workers
  • Ruby workers
  • Go workers
  • JavaScript workers
  • Zig workers

Run in a container

If you don't want to install anything locally you can just run wws from the ghcr.io/vmware-labs/wws:latest container image. You only need to mount your project in the /app folder:

docker run --rm -v $(pwd):/app -p 8080:8080 ghcr.io/vmware-labs/wws:latest

Documentation

All our documentation is available at https://workers.wasmlabs.dev.

Features

You can find all the available features in the documentation. It includes dynamic routes, an in-memory K/V store, etc.

Language Support

Wasm Workers Server focuses on simplicity. We want you to run workers (written in different languages) safely in WebAssembly. For interpreted languages, we add different interpreters:

Language	Support	Requires an external runtime	Issue
Rust	✅	No	-
JavaScript	✅	No	-
Go	✅	No	#95
Ruby	✅	Yes	#63
Python	✅	Yes	#63
Zig	✅	No	#144
PHP	🚧	No	#100

To get more information about multi-language support in Wasm Workers Server, check our documentation.

Development

Prerequisites

To work with this project you will need to install:

• Rust
• Make
• NodeJS

Run the project

After installing the different prerequisites, you can run the development environment with:

$ cargo run -- --help

Wasm Workers Server is split into different Rust crates. The root project produces the wws, while every crate provides specific features.

Contributing

See CONTRIBUTING.md and CODE_OF_CONDUCT.md.

License

Wasm Workers Server is distributed under the terms of the Apache License (Version 2.0).

See LICENSE for details.