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|
use std::future::Future;
use std::io::Write;
use std::net::SocketAddr;
use std::path::PathBuf;
use std::pin::Pin;
use std::sync::{Arc, Mutex};
use http_body_util::Full;
use hyper::body::{Bytes, Incoming};
use hyper::server::conn::http1;
use hyper::service::Service;
use hyper::{Request, Response, StatusCode};
use hyper_util::rt::TokioIo;
use tokio::net::TcpListener;
use crate::error::ReluaxError;
use crate::luax::table_to_html;
use color_eyre::Result;
use rlua::Lua;
pub struct Server {
port: u16,
state: State,
}
#[derive(Clone)]
struct State {
lua: Arc<Mutex<Lua>>,
public_dir: Option<PathBuf>,
}
impl Server {
pub async fn serve(lua: Lua, port: u16, public_dir: Option<PathBuf>) -> Result<()> {
let state = State {
lua: Arc::new(Mutex::new(lua)),
public_dir,
};
let server = Self { port, state };
server.start().await
}
async fn start(self) -> Result<()> {
let addr = SocketAddr::from(([127, 0, 0, 1], self.port));
let listener = TcpListener::bind(addr).await?;
let state = self.state;
loop {
let (stream, _) = listener.accept().await?;
let io = TokioIo::new(stream);
let http = http1::Builder::new();
let state = state.clone();
tokio::task::spawn(async move {
if let Err(err) = http.serve_connection(io, state).await {
println!("Failed to serve connection: {:?}", err);
}
});
}
}
}
fn mk_response(status: StatusCode, s: String) -> Result<Response<Full<Bytes>>> {
Ok(Response::builder()
.status(status)
.body(Full::new(Bytes::from(s)))?)
}
fn mk_file_response(path: PathBuf) -> Result<Response<Full<Bytes>>> {
let ext = path.extension().unwrap().to_str().unwrap();
let mime = match ext {
"css" => "text/css",
"js" => "text/javascript",
"html" => "text/html",
"png" => "image/png",
"jpg" => "image/jpeg",
"jpeg" => "image/jpeg",
"gif" => "image/gif",
"svg" => "image/svg+xml",
_ => "text/plain",
};
let bytes = std::fs::read(path)?;
Ok(Response::builder()
.header("Content-Type", mime)
.body(Full::new(Bytes::from(bytes)))?)
}
impl Service<Request<Incoming>> for State {
type Response = Response<Full<Bytes>>;
type Error = color_eyre::Report;
type Future =
Pin<Box<dyn Future<Output = std::result::Result<Self::Response, Self::Error>> + Send>>;
fn call(&self, req: Request<Incoming>) -> Self::Future {
let path = req.uri().path();
let res = self.serve(path);
Box::pin(async { res })
}
}
impl State {
fn serve(&self, path: &str) -> Result<Response<Full<Bytes>>> {
let lua = self.lua.lock().unwrap();
let res = lua.context(|ctx| -> Result<Response<Full<Bytes>>> {
let manifest: rlua::Result<rlua::Table> = ctx.load("require('reluax')").eval();
let manifest = match manifest {
Ok(m) => m,
Err(e) => {
eprintln!("Internal lua error: {}", e);
return mk_response(
StatusCode::INTERNAL_SERVER_ERROR,
"Internal lua error".to_string(),
);
}
};
let route: rlua::Function = manifest.get("route")?;
let res: rlua::Result<(rlua::Integer, rlua::Value)> = route.call((path,));
let res = match res {
Ok(r) => r,
Err(e) => {
eprintln!("Internal lua error: {}", e);
return mk_response(
StatusCode::INTERNAL_SERVER_ERROR,
"Internal lua error".to_string(),
);
}
};
let status =
StatusCode::from_u16(res.0 as u16).unwrap_or(StatusCode::INTERNAL_SERVER_ERROR);
if status == StatusCode::NOT_FOUND && self.public_dir.is_some() {
// try to serve a static file
let path = self
.public_dir
.clone()
.unwrap()
.join(path.trim_start_matches('/'));
if path.is_file() {
return mk_file_response(path);
}
}
match res.1 {
rlua::Value::String(s) => mk_response(status, s.to_str()?.to_string()),
rlua::Value::Table(t) => {
let mut buf = Vec::new();
writeln!(&mut buf, "<!DOCTYPE html>")?;
table_to_html(t, &mut buf)?;
let s = String::from_utf8(buf).unwrap();
mk_response(status, s)
}
rlua::Value::Nil => Err(ReluaxError::Server("No route found".to_string()).into()),
rlua::Value::Error(e) => Err(ReluaxError::Lua(e).into()),
_ => Err(ReluaxError::Server("Route returned invalid type".to_string()).into()),
}
})?;
Ok(res)
}
}
|
