create a pastebin in rust

main.rs
use std::io::{Error, ErrorKind};
use actix_web::{web, App, HttpServer, HttpResponse, Responder};
use rand::distributions::Alphanumeric;
use rand::{thread_rng, Rng};
use std::fs;

async fn save_paste(data: web::Data<Vec<String>>, text: String) -> impl Responder {
    let id: String = thread_rng()
        .sample_iter(&Alphanumeric)
        .take(10)
        .map(char::from)
        .collect();

    data.get_ref().write().unwrap().push(text.clone());
    fs::write(format!("./pastes/{}.txt", &id), text)
        .unwrap_or_else(|_| Error::new(ErrorKind::Other, "Could not save paste"));

    HttpResponse::Ok().body(id)
}

async fn load_paste(data: web::Data<Vec<String>>, paste_id: web::Path<String>) -> impl Responder {
    match data.get_ref().read().unwrap().get_index(&paste_id).map(|x| x.clone()) {
        Some(text) => HttpResponse::Ok().body(text),
        None => HttpResponse::NotFound().body("Paste not found"),
    }
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    let data = web::Data::new(Arc::new(RwLock::new(Vec::new())));
    
    fs::create_dir_all("./pastes").unwrap();

    HttpServer::new(move || {
        App::new()
            .app_data(data.clone())
            .route("/save", web::post().to(save_paste))
            .route("/load/{paste_id}", web::get().to(load_paste))
    })
    .bind("127.0.0.1:8080")?
    .run()
    .await
}

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