https://github.com/tbillington/rust_serverless_runtime

A serverless runtime in 200 lines atop deno and sqlite
https://github.com/tbillington/rust_serverless_runtime

deno rust serverless sqlite v8

Last synced: 3 months ago
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A serverless runtime in 200 lines atop deno and sqlite

• Host: GitHub
• URL: https://github.com/tbillington/rust_serverless_runtime
• Owner: tbillington
• License: mit
• Created: 2022-09-13T10:33:12.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-09-16T08:50:41.000Z (over 2 years ago)
• Last Synced: 2024-05-21T12:09:38.488Z (8 months ago)
• Topics: deno, rust, serverless, sqlite, v8
• Language: Rust
• Homepage:
• Size: 34.2 KB
• Stars: 127
• Watchers: 6
• Forks: 10
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
This repo is a demonstration of how you could build your own "serverless" platform with data persistence in only 200~ lines of simple, safe code.

It combines [deno](https://deno.land/) (rust v8 runtime), [axum](https://github.com/tokio-rs/axum/) (http library), and [rusqlite](https://github.com/rusqlite/rusqlite) (sqlite) to build a Function as a Service (FaaS)-like application with file-system backed storage.

A user submits javascript code with a HTTP POST request, then is able to invoke their function via GET requests.

The js environment the code is executed within has access to 3 operations implemented in rust. `console.log` emits messages via stdout on the server, `set` inserts into a sqlite backed key-value store, and `get` retrieves from the same store.

The last evaluated expression from an invoked js function will be returned in the HTTP GET response body.

### Example

https://user-images.githubusercontent.com/2771466/190379404-8c45ff20-c7f9-4215-b18a-cd3926bc0e1f.mov

In your first terminal

```

cargo run

```

In your second terminal

```bash

# Submit the contents of fn.js as the function "raccoon"

curl -d @fn.js localhost:8080/fn/raccoon

# Invoke the function by it's name

curl localhost:8080/fn/raccoon

# And a couple more times... just in case

curl localhost:8080/fn/raccoon

curl localhost:8080/fn/raccoon

curl localhost:8080/fn/raccoon

```