Initial rewrite

- Working router and lua binding
This commit is contained in:
Christopher Williams 2024-09-12 15:06:30 -04:00
commit b93dc26ebb
6 changed files with 688 additions and 0 deletions

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/target

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Cargo.toml Normal file
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
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env_logger = "0.11.5"
log = "0.4.22"
mlua = { version = "0.9.9", features = ["lua54", "macros"] }
tiny_http = "0.12.0"

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src/main.rs Normal file
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use std::cell::RefCell;
use std::sync::{Arc, Mutex};
use std::rc::Rc;
use anyhow::Result;
use log::info;
mod router;
mod scripting;
fn main() -> Result<()> {
env_logger::init();
let router = router::Router::new(8001);
let router_ref = Rc::new(RefCell::new(router));
let engine = scripting::Scripting::new(router_ref.clone());
info!("Successfully created router and scripting engine");
{
// NOTE: This block is necessary to avoid a double borrow of the router
// when calling `add_route` from the Lua script
let router = router_ref.clone();
let mut router = router.borrow_mut();
router.add_route("/".to_string());
router.add_route("/about".to_string());
}
engine.load_globals()?;
engine.load_script("log:info('Hello, world!')")?;
engine.load_script("log:debug('Debug message')")?;
engine.load_script("log:warn('Warning message')")?;
engine.load_script("log:error('Error message')")?;
engine.load_script("router:add_route('/contact');router:add_route('/godot')")?;
engine.load_script("for k, v in pairs(router:get_routes()) do print(k, v) end")?;
let router = router_ref.clone();
let router = router.borrow();
println!("Routes: {:?}", router.get_routes());
router.serve();
Ok(())
}

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src/router.rs Normal file
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use std::{collections::HashMap, sync::{Arc, Mutex}};
use anyhow::Result;
use mlua::{IntoLua, Lua, MetaMethod, UserData, UserDataMethods};
use tiny_http::{Response, Server};
pub struct Router {
//TODO: Redis to cache the route response
routes: Arc<Mutex<HashMap<String, String>>>,
server: Server,
}
impl Router {
pub fn new(port: u16) -> Router {
let binding = format!("[::]:{}", port);
let server = Server::http(binding);
match server {
Ok(server) => Router {
routes: Arc::new(Mutex::new(HashMap::new())),
server,
},
//TODO: Handle the case where the server fails to start due to binding issues
Err(_) => panic!("Failed to start server"),
}
}
pub fn add_route(&mut self, route: String) {
let mut routes = self.routes.lock().unwrap();
routes.insert(route, "".to_string());
}
pub fn get_routes(&self) -> HashMap<String, String> {
let routes = self.routes.lock().unwrap();
routes.clone()
}
pub fn serve(&self) {
for request in self.server.incoming_requests() {
let path = request.url();
println!("Received request for {}", path);
if self.routes.lock().unwrap().contains_key(path) {
let response = Response::from_string("Hello, world!".to_string());
let _ = request.respond(response);
}
}
}
}
impl UserData for Router {
fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_method_mut("add_route", |_, this, route: String| {
this.add_route(route);
Ok(())
});
methods.add_method("get_routes", |_, this, _: ()| {
Ok(this.get_routes())
});
methods.add_meta_function(MetaMethod::Call, |_, ()| Ok(()));
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_router() {
let mut router = Router::new(8000);
router.add_route("/".to_string());
router.add_route("/about".to_string());
router.add_route("/contact".to_string());
assert_eq!(
router.get_routes(),
&vec![
"/".to_string(),
"/about".to_string(),
"/contact".to_string()
]
);
}
}

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src/scripting.rs Normal file
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use crate::router;
use log::{debug, error, info, warn};
use mlua::{chunk, Lua, MetaMethod, Result, UserData, UserDataMethods};
use std::{
cell::RefCell,
rc::Rc,
sync::{Arc, Mutex},
};
type SharedRouter = Rc<RefCell<router::Router>>;
pub struct Scripting {
router: SharedRouter,
lua: Lua,
}
impl Scripting {
pub fn new(router: SharedRouter) -> Self {
Self {
router,
lua: Lua::new(),
}
}
pub fn load_script(&self, script: &str) -> Result<()> {
self.lua.load(script).exec()
}
pub fn load_globals(&self) -> Result<()> {
let _ = self.lua.globals().set("router", self.router.clone());
// Add the Log module to the Lua environment
let log = self.lua.create_userdata(Log {})?;
let _ = self.lua.globals().set("log", log);
Ok(())
}
}
pub struct Log {}
impl UserData for Log {
fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_method("info", |_, _, msg: String| {
info!("{}", msg);
Ok(())
});
methods.add_method("debug", |_, _, msg: String| {
debug!("{}", msg);
Ok(())
});
methods.add_method("warn", |_, _, msg: String| {
warn!("{}", msg);
Ok(())
});
methods.add_method("error", |_, _, msg: String| {
error!("{}", msg);
Ok(())
});
methods.add_meta_function(MetaMethod::Call, |_, ()| Ok(()));
}
}