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Initial implementation of owned Lua types

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This commit is contained in:
Alex Orlenko
2022-10-16 23:36:26 +01:00
parent 02c08c6350
commit bf79d9e75d
10 changed files with 267 additions and 39 deletions
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examples/async_http_server.rs
+16 -16
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@@ -1,7 +1,6 @@
use std::future::Future;
use std::net::SocketAddr;
use std::pin::Pin;
use std::rc::Rc;
use std::task::{Context, Poll};
use hyper::server::conn::AddrStream;
@@ -9,7 +8,8 @@ use hyper::service::Service;
use hyper::{Body, Request, Response, Server};
use mlua::{
chunk, Error as LuaError, Function, Lua, String as LuaString, Table, UserData, UserDataMethods,
chunk, Error as LuaError, Function, Lua, OwnedFunction, String as LuaString, Table, UserData,
UserDataMethods,
};
struct LuaRequest(SocketAddr, Request<Body>);
@@ -21,7 +21,10 @@ impl UserData for LuaRequest {
}
}
pub struct Svc(Rc<Lua>, SocketAddr);
#[derive(Clone)]
struct Handler(OwnedFunction);
pub struct Svc(Handler, SocketAddr);
impl Service<Request<Body>> for Svc {
type Response = Response<Body>;
@@ -34,11 +37,10 @@ impl Service<Request<Body>> for Svc {
fn call(&mut self, req: Request<Body>) -> Self::Future {
// If handler returns an error then generate 5xx response
let lua = self.0.clone();
let handler = self.0.clone();
let lua_req = LuaRequest(self.1, req);
Box::pin(async move {
let handler: Function = lua.named_registry_value("http_handler")?;
match handler.call_async::<_, Table>(lua_req).await {
match handler.0.to_ref().call_async::<_, Table>(lua_req).await {
Ok(lua_resp) => {
let status = lua_resp.get::<_, Option<u16>>("status")?.unwrap_or(200);
let mut resp = Response::builder().status(status);
@@ -72,10 +74,10 @@ impl Service<Request<Body>> for Svc {
#[tokio::main(flavor = "current_thread")]
async fn main() {
let lua = Rc::new(Lua::new());
let lua = Lua::new();
// Create Lua handler function
let handler: Function = lua
let handler_fn: Function = lua
.load(chunk! {
function(req)
return {
@@ -91,12 +93,10 @@ async fn main() {
.eval()
.expect("cannot create Lua handler");
// Store it in the Registry
lua.set_named_registry_value("http_handler", handler)
.expect("cannot store Lua handler");
let addr = ([127, 0, 0, 1], 3000).into();
let server = Server::bind(&addr).executor(LocalExec).serve(MakeSvc(lua));
let server = Server::bind(&addr)
.executor(LocalExec)
.serve(MakeSvc(Handler(handler_fn.into_owned())));
println!("Listening on http://{}", addr);
@@ -105,7 +105,7 @@ async fn main() {
local.run_until(server).await.expect("cannot run server")
}
struct MakeSvc(Rc<Lua>);
struct MakeSvc(Handler);
impl Service<&AddrStream> for MakeSvc {
type Response = Svc;
@@ -117,9 +117,9 @@ impl Service<&AddrStream> for MakeSvc {
}
fn call(&mut self, stream: &AddrStream) -> Self::Future {
let lua = self.0.clone();
let handler = self.0.clone();
let remote_addr = stream.remote_addr();
Box::pin(async move { Ok(Svc(lua, remote_addr)) })
Box::pin(async move { Ok(Svc(handler, remote_addr)) })
}
}