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actix-web
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Merge branch 'master' into tokio0.3

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fakeshadow 2020-12-25 03:28:13 +08:00 committed by GitHub
parent efba6c3a28 ecf08d5156
commit 3239dab8ea
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1 changed files with 87 additions and 59 deletions
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146
actix-http/src/h1/dispatcher.rs
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@ -132,8 +132,8 @@ where
B: MessageBody, B: MessageBody,
{ {
None, None,
ExpectCall(Pin<Box<X::Future>>), ExpectCall(#[pin] X::Future),
ServiceCall(Pin<Box<S::Future>>), ServiceCall(#[pin] S::Future),
SendPayload(#[pin] ResponseBody<B>), SendPayload(#[pin] ResponseBody<B>),
} }
@ -349,7 +349,7 @@ where
self: Pin<&mut Self>, self: Pin<&mut Self>,
message: Response<()>, message: Response<()>,
body: ResponseBody<B>, body: ResponseBody<B>,
) -> Result<State<S, B, X>, DispatchError> { ) -> Result<(), DispatchError> {
let mut this = self.project(); let mut this = self.project();
this.codec this.codec
.encode(Message::Item((message, body.size())), &mut this.write_buf) .encode(Message::Item((message, body.size())), &mut this.write_buf)
@ -362,9 +362,10 @@ where
this.flags.set(Flags::KEEPALIVE, this.codec.keepalive()); this.flags.set(Flags::KEEPALIVE, this.codec.keepalive());
match body.size() { match body.size() {
BodySize::None | BodySize::Empty => Ok(State::None), BodySize::None | BodySize::Empty => this.state.set(State::None),
_ => Ok(State::SendPayload(body)), _ => this.state.set(State::SendPayload(body)),
} };
Ok(())
} }
fn send_continue(self: Pin<&mut Self>) { fn send_continue(self: Pin<&mut Self>) {
@ -379,49 +380,52 @@ where
) -> Result<PollResponse, DispatchError> { ) -> Result<PollResponse, DispatchError> {
loop { loop {
let mut this = self.as_mut().project(); let mut this = self.as_mut().project();
let state = match this.state.project() { // state is not changed on Poll::Pending.
// other variant and conditions always trigger a state change(or an error).
let state_change = match this.state.project() {
StateProj::None => match this.messages.pop_front() { StateProj::None => match this.messages.pop_front() {
Some(DispatcherMessage::Item(req)) => { Some(DispatcherMessage::Item(req)) => {
Some(self.as_mut().handle_request(req, cx)?) self.as_mut().handle_request(req, cx)?;
true
} }
Some(DispatcherMessage::Error(res)) => Some( Some(DispatcherMessage::Error(res)) => {
self.as_mut() self.as_mut()
.send_response(res, ResponseBody::Other(Body::Empty))?, .send_response(res, ResponseBody::Other(Body::Empty))?;
), true
}
Some(DispatcherMessage::Upgrade(req)) => { Some(DispatcherMessage::Upgrade(req)) => {
return Ok(PollResponse::Upgrade(req)); return Ok(PollResponse::Upgrade(req));
} }
None => None, None => false,
}, },
StateProj::ExpectCall(fut) => match fut.as_mut().poll(cx) { StateProj::ExpectCall(fut) => match fut.poll(cx) {
Poll::Ready(Ok(req)) => { Poll::Ready(Ok(req)) => {
self.as_mut().send_continue(); self.as_mut().send_continue();
this = self.as_mut().project(); this = self.as_mut().project();
this.state this.state.set(State::ServiceCall(this.service.call(req)));
.set(State::ServiceCall(Box::pin(this.service.call(req))));
continue; continue;
} }
Poll::Ready(Err(e)) => { Poll::Ready(Err(e)) => {
let res: Response = e.into().into(); let res: Response = e.into().into();
let (res, body) = res.replace_body(()); let (res, body) = res.replace_body(());
Some(self.as_mut().send_response(res, body.into_body())?) self.as_mut().send_response(res, body.into_body())?;
true
} }
Poll::Pending => None, Poll::Pending => false,
}, },
StateProj::ServiceCall(fut) => match fut.as_mut().poll(cx) { StateProj::ServiceCall(fut) => match fut.poll(cx) {
Poll::Ready(Ok(res)) => { Poll::Ready(Ok(res)) => {
let (res, body) = res.into().replace_body(()); let (res, body) = res.into().replace_body(());
let state = self.as_mut().send_response(res, body)?; self.as_mut().send_response(res, body)?;
this = self.as_mut().project();
this.state.set(state);
continue; continue;
} }
Poll::Ready(Err(e)) => { Poll::Ready(Err(e)) => {
let res: Response = e.into().into(); let res: Response = e.into().into();
let (res, body) = res.replace_body(()); let (res, body) = res.replace_body(());
Some(self.as_mut().send_response(res, body.into_body())?) self.as_mut().send_response(res, body.into_body())?;
true
} }
Poll::Pending => None, Poll::Pending => false,
}, },
StateProj::SendPayload(mut stream) => { StateProj::SendPayload(mut stream) => {
loop { loop {
@ -456,11 +460,8 @@ where
} }
}; };
this = self.as_mut().project(); // state is changed and continue when the state is not Empty
if state_change {
// set new state
if let Some(state) = state {
this.state.set(state);
if !self.state.is_empty() { if !self.state.is_empty() {
continue; continue;
} }
@ -485,39 +486,67 @@ where
mut self: Pin<&mut Self>, mut self: Pin<&mut Self>,
req: Request, req: Request,
cx: &mut Context<'_>, cx: &mut Context<'_>,
) -> Result<State<S, B, X>, DispatchError> { ) -> Result<(), DispatchError> {
// Handle `EXPECT: 100-Continue` header // Handle `EXPECT: 100-Continue` header
let req = if req.head().expect() { if req.head().expect() {
let mut task = Box::pin(self.as_mut().project().expect.call(req)); // set dispatcher state so the future is pinned.
match task.as_mut().poll(cx) { let task = self.as_mut().project().expect.call(req);
Poll::Ready(Ok(req)) => { self.as_mut().project().state.set(State::ExpectCall(task));
self.as_mut().send_continue();
req
}
Poll::Pending => return Ok(State::ExpectCall(task)),
Poll::Ready(Err(e)) => {
let e = e.into();
let res: Response = e.into();
let (res, body) = res.replace_body(());
return self.send_response(res, body.into_body());
}
}
} else { } else {
req // the same as above.
let task = self.as_mut().project().service.call(req);
self.as_mut().project().state.set(State::ServiceCall(task));
}; };
// Call service // eagerly poll the future for once(or twice if expect is resolved immediately).
let mut task = Box::pin(self.as_mut().project().service.call(req)); loop {
match task.as_mut().poll(cx) { match self.as_mut().project().state.project() {
Poll::Ready(Ok(res)) => { StateProj::ExpectCall(fut) => {
let (res, body) = res.into().replace_body(()); match fut.poll(cx) {
self.send_response(res, body) // expect is resolved. continue loop and poll the service call branch.
} Poll::Ready(Ok(req)) => {
Poll::Pending => Ok(State::ServiceCall(task)), self.as_mut().send_continue();
Poll::Ready(Err(e)) => { let task = self.as_mut().project().service.call(req);
let res: Response = e.into().into(); self.as_mut().project().state.set(State::ServiceCall(task));
let (res, body) = res.replace_body(()); continue;
self.send_response(res, body.into_body()) }
// future is pending. return Ok(()) to notify that a new state is
// set and the outer loop should be continue.
Poll::Pending => return Ok(()),
// future is error. send response and return a result. On success
// to notify the dispatcher a new state is set and the outer loop
// should be continue.
Poll::Ready(Err(e)) => {
let e = e.into();
let res: Response = e.into();
let (res, body) = res.replace_body(());
return self.send_response(res, body.into_body());
}
}
}
StateProj::ServiceCall(fut) => {
// return no matter the service call future's result.
return match fut.poll(cx) {
// future is resolved. send response and return a result. On success
// to notify the dispatcher a new state is set and the outer loop
// should be continue.
Poll::Ready(Ok(res)) => {
let (res, body) = res.into().replace_body(());
self.send_response(res, body)
}
// see the comment on ExpectCall state branch's Pending.
Poll::Pending => Ok(()),
// see the comment on ExpectCall state branch's Ready(Err(e)).
Poll::Ready(Err(e)) => {
let res: Response = e.into().into();
let (res, body) = res.replace_body(());
self.send_response(res, body.into_body())
}
};
}
_ => unreachable!(
"State must be set to ServiceCall or ExceptCall in handle_request"
),
} }
} }
} }
@ -568,9 +597,8 @@ where
// handle request early // handle request early
if this.state.is_empty() { if this.state.is_empty() {
let state = self.as_mut().handle_request(req, cx)?; self.as_mut().handle_request(req, cx)?;
this = self.as_mut().project(); this = self.as_mut().project();
this.state.set(state);
} else { } else {
this.messages.push_back(DispatcherMessage::Item(req)); this.messages.push_back(DispatcherMessage::Item(req));
} }