getting started with web server

Cargo.toml

@@ -17,4 +17,5 @@ lazy_static = "1.4.0"
 thiserror = "1.0.30"
 log = "0.4.16"
 env_logger = "0.9.0"
+actix-web = "4.0.1"
 cozorocks = { path = "cozorocks" }

src/bin/cozo_rest/main.rs

@@ -0,0 +1,44 @@
+use actix_web::{get, post, web, App, HttpResponse, HttpServer, Responder};
+use cozo::DbInstance;
+use std::sync::Arc;
+
+struct AppStateWithDb {
+    db: DbInstance,
+}
+
+#[get("/")]
+async fn hello(data: web::Data<AppStateWithDb>) -> impl Responder {
+    // let sess = data.db.session().unwrap().start().unwrap();
+    // let res = sess.get_next_main_table_id();
+    HttpResponse::Ok().body(format!("Hello world! {:?}", None))
+}
+
+#[post("/echo")]
+async fn echo(req_body: String) -> impl Responder {
+    HttpResponse::Ok().body(req_body)
+}
+
+async fn manual_hello() -> impl Responder {
+    HttpResponse::Ok().body("Hey there!")
+}
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    let mut db = DbInstance::new("_test_rest", false).unwrap();
+    db.set_destroy_on_close(true);
+    let db = web::Data::new(AppStateWithDb {
+        db
+    });
+
+
+    HttpServer::new(move || {
+        App::new()
+            .app_data(db.clone())
+            .service(hello)
+            .service(echo)
+            .route("/hey", web::get().to(manual_hello))
+    })
+    .bind(("127.0.0.1", 8080))?
+    .run()
+    .await
+}

src/runtime/instance.rs

@@ -50,6 +50,10 @@ pub struct DbInstance {
     destroy_on_close: bool,
 }
 
+unsafe impl Send for DbInstance {}
+
+unsafe impl Sync for DbInstance {}
+
 impl DbInstance {
     pub fn new(path: &str, optimistic: bool) -> Result<Self> {
         let options = default_options().make_shared();