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use std::marker::PhantomData; use std::net::SocketAddr; use std::task::{Context, Poll}; use actix_service::{Service, ServiceFactory as BaseServiceFactory}; use actix_utils::counter::CounterGuard; use futures_core::future::LocalBoxFuture; use log::error; use crate::socket::{FromStream, MioStream}; use crate::{ready, Ready, Token}; pub trait ServiceFactory<Stream: FromStream>: Send + Clone + 'static { type Factory: BaseServiceFactory<Stream, Config = ()>; fn create(&self) -> Self::Factory; } pub(crate) trait InternalServiceFactory: Send { fn name(&self, token: Token) -> &str; fn clone_factory(&self) -> Box<dyn InternalServiceFactory>; fn create(&self) -> LocalBoxFuture<'static, Result<Vec<(Token, BoxedServerService)>, ()>>; } pub(crate) type BoxedServerService = Box< dyn Service< (Option<CounterGuard>, MioStream), Response = (), Error = (), Future = Ready<Result<(), ()>>, >, >; pub(crate) struct StreamService<S, I> { service: S, _phantom: PhantomData<I>, } impl<S, I> StreamService<S, I> { pub(crate) fn new(service: S) -> Self { StreamService { service, _phantom: PhantomData, } } } impl<S, I> Service<(Option<CounterGuard>, MioStream)> for StreamService<S, I> where S: Service<I>, S::Future: 'static, S::Error: 'static, I: FromStream, { type Response = (); type Error = (); type Future = Ready<Result<(), ()>>; fn poll_ready(&self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> { self.service.poll_ready(ctx).map_err(|_| ()) } fn call(&self, (guard, req): (Option<CounterGuard>, MioStream)) -> Self::Future { ready(match FromStream::from_mio(req) { Ok(stream) => { let f = self.service.call(stream); actix_rt::spawn(async move { let _ = f.await; drop(guard); }); Ok(()) } Err(e) => { error!("Can not convert to an async tcp stream: {}", e); Err(()) } }) } } pub(crate) struct StreamNewService<F: ServiceFactory<Io>, Io: FromStream> { name: String, inner: F, token: Token, addr: SocketAddr, _t: PhantomData<Io>, } impl<F, Io> StreamNewService<F, Io> where F: ServiceFactory<Io>, Io: FromStream + Send + 'static, { pub(crate) fn create( name: String, token: Token, inner: F, addr: SocketAddr, ) -> Box<dyn InternalServiceFactory> { Box::new(Self { name, token, inner, addr, _t: PhantomData, }) } } impl<F, Io> InternalServiceFactory for StreamNewService<F, Io> where F: ServiceFactory<Io>, Io: FromStream + Send + 'static, { fn name(&self, _: Token) -> &str { &self.name } fn clone_factory(&self) -> Box<dyn InternalServiceFactory> { Box::new(Self { name: self.name.clone(), inner: self.inner.clone(), token: self.token, addr: self.addr, _t: PhantomData, }) } fn create(&self) -> LocalBoxFuture<'static, Result<Vec<(Token, BoxedServerService)>, ()>> { let token = self.token; let fut = self.inner.create().new_service(()); Box::pin(async move { match fut.await { Ok(inner) => { let service = Box::new(StreamService::new(inner)) as _; Ok(vec![(token, service)]) } Err(_) => Err(()), } }) } } impl<F, T, I> ServiceFactory<I> for F where F: Fn() -> T + Send + Clone + 'static, T: BaseServiceFactory<I, Config = ()>, I: FromStream, { type Factory = T; fn create(&self) -> T { (self)() } }