https://github.com/mossaka/wit-vtable

vtable for functions
https://github.com/mossaka/wit-vtable

Last synced: about 1 month ago
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vtable for functions

• Host: GitHub
• URL: https://github.com/mossaka/wit-vtable
• Owner: Mossaka
• Created: 2022-07-20T06:15:15.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-07-28T18:17:55.000Z (over 2 years ago)
• Last Synced: 2023-03-04T09:44:13.470Z (over 1 year ago)
• Language: Rust
• Size: 83 KB
• Stars: 1
• Watchers: 1
• Forks: 1
• Open Issues: 3
• Metadata Files:
  • Readme: README.md

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README

        
# vtable for WIT functions

This repo experiments implementing multiple callback functions in a wasm module that links to WIT bindings. 

## register callback functions

```rust

fn main() -> Result<()> {

    events::Events::new()

        .listen("handle_event1")

        .listen("handle_event2")

        .exec();

    Ok(())

}

#[register_handler]

fn handle_event1(ev: Event) {

    println!("handle_event1 {}", ev.id);

}

#[register_handler]

fn handle_event2(ev: Event) {

    println!("handle_event2 {}", ev.id);

}

```

## run

![run result](/assets/run_result.png)

## Future proposal: HTTP Router and Server

```rust

fn main() -> Result<()> {

    let router = Router::builder()

        .get("/", "home_handler")

        .get("/users/:userId", "user_handler")

        .build()?

    let service = Service::new(router)?;

    Server::bind("localhost:3000").serve(service);

}

#[register_get]

fn home_handler(req: Request) -> Result, Infallible> {

    let state = req.data::().unwrap();

    println!("State value: {}", state.0);

    Ok(Response::new(Body::from("Home page")))

}

#[register_get]

fn user_handler(req: Request) -> Result, Infallible> {

    let user_id = req.param("userId").unwrap();

    Ok(Response::new(Body::from(format!("Hello {}", user_id))))

}

```