use std; use std::rc::Rc; use std::cell::RefCell; use std::collections::VecDeque; use std::marker::PhantomData; use futures::{Async, Future, Stream, Poll}; use futures::sync::oneshot::Sender; use actix::{Actor, ActorState, ActorContext, AsyncContext, Handler, Subscriber, ResponseType}; use actix::fut::ActorFuture; use actix::dev::{AsyncContextApi, ActorAddressCell, ActorItemsCell, ActorWaitCell, SpawnHandle, Envelope, ToEnvelope, RemoteEnvelope}; use task::{IoContext, DrainFut}; use body::Binary; use route::{Route, Frame}; use httpresponse::HttpResponse; /// Http actor execution context pub struct HttpContext where A: Actor> + Route, { act: Option, state: ActorState, modified: bool, items: ActorItemsCell, address: ActorAddressCell, stream: VecDeque, wait: ActorWaitCell, app_state: Rc<::State>, disconnected: bool, } impl IoContext for HttpContext where A: Actor + Route { fn disconnected(&mut self) { self.items.stop(); self.disconnected = true; if self.state == ActorState::Running { self.state = ActorState::Stopping; } } } impl ActorContext for HttpContext where A: Actor + Route { /// Stop actor execution fn stop(&mut self) { self.stream.push_back(Frame::Payload(None)); self.items.stop(); self.address.close(); if self.state == ActorState::Running { self.state = ActorState::Stopping; } } /// Terminate actor execution fn terminate(&mut self) { self.address.close(); self.items.close(); self.state = ActorState::Stopped; } /// Actor execution state fn state(&self) -> ActorState { self.state } } impl AsyncContext for HttpContext where A: Actor + Route { fn spawn(&mut self, fut: F) -> SpawnHandle where F: ActorFuture + 'static { self.modified = true; self.items.spawn(fut) } fn wait(&mut self, fut: F) where F: ActorFuture + 'static { self.modified = true; self.wait.add(fut); } fn cancel_future(&mut self, handle: SpawnHandle) -> bool { self.modified = true; self.items.cancel_future(handle) } fn cancel_future_on_stop(&mut self, handle: SpawnHandle) { self.items.cancel_future_on_stop(handle) } } #[doc(hidden)] impl AsyncContextApi for HttpContext where A: Actor + Route { fn address_cell(&mut self) -> &mut ActorAddressCell { &mut self.address } } impl HttpContext where A: Actor + Route { pub fn new(state: Rc<::State>) -> HttpContext { HttpContext { act: None, state: ActorState::Started, modified: false, items: ActorItemsCell::default(), address: ActorAddressCell::default(), wait: ActorWaitCell::default(), stream: VecDeque::new(), app_state: state, disconnected: false, } } pub(crate) fn set_actor(&mut self, act: A) { self.act = Some(act) } } impl HttpContext where A: Actor + Route { /// Shared application state pub fn state(&self) -> &::State { &self.app_state } /// Start response processing pub fn start>(&mut self, response: R) { self.stream.push_back(Frame::Message(response.into())) } /// Write payload pub fn write>(&mut self, data: B) { self.stream.push_back(Frame::Payload(Some(data.into()))) } /// Indicate end of streamimng payload. Also this method calls `Self::close`. pub fn write_eof(&mut self) { self.stop(); } /// Returns drain future pub fn drain(&mut self) -> Drain { let fut = Rc::new(RefCell::new(DrainFut::default())); self.stream.push_back(Frame::Drain(Rc::clone(&fut))); self.modified = true; Drain{ a: PhantomData, inner: fut } } /// Check if connection still open pub fn connected(&self) -> bool { !self.disconnected } } impl HttpContext where A: Actor + Route { #[doc(hidden)] pub fn subscriber(&mut self) -> Box> where A: Handler, M: ResponseType + 'static, { Box::new(self.address.unsync_address()) } #[doc(hidden)] pub fn sync_subscriber(&mut self) -> Box + Send> where A: Handler, M: ResponseType + Send + 'static, M::Item: Send, M::Error: Send, { Box::new(self.address.sync_address()) } } #[doc(hidden)] impl Stream for HttpContext where A: Actor + Route { type Item = Frame; type Error = std::io::Error; fn poll(&mut self) -> Poll, std::io::Error> { if self.act.is_none() { return Ok(Async::NotReady) } let act: &mut A = unsafe { std::mem::transmute(self.act.as_mut().unwrap() as &mut A) }; let ctx: &mut HttpContext = unsafe { std::mem::transmute(self as &mut HttpContext) }; // update state match self.state { ActorState::Started => { Actor::started(act, ctx); self.state = ActorState::Running; }, ActorState::Stopping => { Actor::stopping(act, ctx); } _ => () } let mut prep_stop = false; loop { self.modified = false; // check wait futures if self.wait.poll(act, ctx) { // get frame if let Some(frame) = self.stream.pop_front() { return Ok(Async::Ready(Some(frame))) } return Ok(Async::NotReady) } // incoming messages self.address.poll(act, ctx); // spawned futures and streams self.items.poll(act, ctx); // are we done if self.modified { continue } // get frame if let Some(frame) = self.stream.pop_front() { return Ok(Async::Ready(Some(frame))) } // check state match self.state { ActorState::Stopped => { self.state = ActorState::Stopped; Actor::stopped(act, ctx); return Ok(Async::Ready(None)) }, ActorState::Stopping => { if prep_stop { if self.address.connected() || !self.items.is_empty() { self.state = ActorState::Running; continue } else { self.state = ActorState::Stopped; Actor::stopped(act, ctx); return Ok(Async::Ready(None)) } } else { Actor::stopping(act, ctx); prep_stop = true; continue } }, ActorState::Running => { if !self.address.connected() && self.items.is_empty() { self.state = ActorState::Stopping; Actor::stopping(act, ctx); prep_stop = true; continue } }, _ => (), } return Ok(Async::NotReady) } } } impl ToEnvelope for HttpContext where A: Actor> + Route, { fn pack(msg: M, tx: Option>>) -> Envelope where A: Handler, M: ResponseType + Send + 'static, M::Item: Send, M::Error: Send { RemoteEnvelope::new(msg, tx).into() } } pub struct Drain { a: PhantomData, inner: Rc> } impl ActorFuture for Drain where A: Actor { type Item = (); type Error = (); type Actor = A; fn poll(&mut self, _: &mut A, _: &mut ::Context) -> Poll<(), ()> { self.inner.borrow_mut().poll() } }