101 lines
3 KiB
Rust
101 lines
3 KiB
Rust
mod session;
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mod flow;
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mod command;
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use std::sync::Arc;
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use std::task::{Context, Poll};
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use anyhow::Result;
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use boitalettres::errors::Error as BalError;
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use boitalettres::proto::{Request, Response};
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use boitalettres::server::accept::addr::AddrStream;
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use boitalettres::server::Server as ImapServer;
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use futures::future::BoxFuture;
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use futures::future::FutureExt;
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use tower::Service;
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use crate::LoginProvider;
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/// Server is a thin wrapper to register our Services in BàL
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pub struct Server(ImapServer<AddrIncoming, service::Instance>);
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pub async fn new(
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config: ImapConfig,
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login: Arc<dyn LoginProvider + Send + Sync>,
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) -> Result<Server> {
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//@FIXME add a configuration parameter
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let incoming = AddrIncoming::new(config.bind_addr).await?;
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let imap = ImapServer::new(incoming).serve(service::Instance::new(login.clone()));
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tracing::info!("IMAP activated, will listen on {:#}", self.imap.incoming.local_addr);
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Server(imap)
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}
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impl Server {
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pub async fn run(&self, mut must_exit: watch::Receiver<bool>) -> Result<()> {
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tracing::info!("IMAP started!");
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tokio::select! {
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s = self => s?,
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_ = must_exit.changed() => tracing::info!("Stopped IMAP server"),
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}
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Ok(())
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}
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}
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//---
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/// Instance is the main Tokio Tower service that we register in BàL.
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/// It receives new connection demands and spawn a dedicated service.
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struct Instance {
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login_provider: Arc<dyn LoginProvider + Send + Sync>,
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}
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impl Instance {
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pub fn new(login_provider: Arc<dyn LoginProvider + Send + Sync>) -> Self {
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Self { login_provider }
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}
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}
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impl<'a> Service<&'a AddrStream> for Instance {
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type Response = Connection;
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type Error = anyhow::Error;
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type Future = BoxFuture<'static, Result<Self::Response>>;
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fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
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Poll::Ready(Ok(()))
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}
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fn call(&mut self, addr: &'a AddrStream) -> Self::Future {
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tracing::info!(remote_addr = %addr.remote_addr, local_addr = %addr.local_addr, "accept");
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let lp = self.login_provider.clone();
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async { Ok(Connection::new(lp)) }.boxed()
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}
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}
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//---
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/// Connection is the per-connection Tokio Tower service we register in BàL.
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/// It handles a single TCP connection, and thus has a business logic.
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struct Connection {
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session: session::Manager,
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}
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impl Connection {
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pub fn new(login_provider: Arc<dyn LoginProvider + Send + Sync>) -> Self {
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Self {
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session: session::Manager::new(login_provider),
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}
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}
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}
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impl Service<Request> for Connection {
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type Response = Response;
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type Error = BalError;
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type Future = BoxFuture<'static, Result<Self::Response, Self::Error>>;
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fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
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Poll::Ready(Ok(()))
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}
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fn call(&mut self, req: Request) -> Self::Future {
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tracing::debug!("Got request: {:#?}", req);
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self.session.process(req)
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}
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}
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