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better pipeline error handling

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This commit is contained in:
Nikolay Kim 2017-11-25 09:28:25 -08:00
parent 64ade803f9
commit 1fc64bc83d
4 changed files with 40 additions and 42 deletions
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12
src/h1.rs
View file

@ -106,8 +106,7 @@ impl<T, H> Http1<T, H>
}
// this is anoying
match item.task.poll_io(&mut self.stream)
{
match item.task.poll_io(&mut self.stream) {
Ok(Async::Ready(ready)) => {
not_ready = false;
@ -126,9 +125,10 @@ impl<T, H> Http1<T, H>
// no more IO for this iteration
io = true;
},
Err(_) => {
Err(err) => {
// it is not possible to recover from error
// during task handling, so just drop connection
error!("Unhandled error: {}", err);
return Err(())
}
}
@ -139,8 +139,10 @@ impl<T, H> Http1<T, H>
not_ready = false;
item.finished = true;
},
Err(_) =>
item.error = true,
Err(err) => {
item.error = true;
error!("Unhandled error: {}", err);
}
}
}
idx += 1;

6
src/h2.rs
View file

@ -92,7 +92,8 @@ impl<T, H> Http2<T, H>
not_ready = false;
},
Ok(Async::NotReady) => (),
Err(_) => {
Err(err) => {
error!("Unhandled error: {}", err);
item.eof = true;
item.error = true;
item.stream.reset(Reason::INTERNAL_ERROR);
@ -105,9 +106,10 @@ impl<T, H> Http2<T, H>
not_ready = false;
item.finished = true;
},
Err(_) => {
Err(err) => {
item.error = true;
item.finished = true;
error!("Unhandled error: {}", err);
}
}
}

22
src/pipeline.rs
View file

@ -58,7 +58,7 @@ impl Pipeline {
}
}
pub(crate) fn poll_io<T: Writer>(&mut self, io: &mut T) -> Poll<bool, ()> {
pub(crate) fn poll_io<T: Writer>(&mut self, io: &mut T) -> Poll<bool, Error> {
loop {
let state = mem::replace(&mut self.0, PipelineState::None);
match state {
@ -161,7 +161,7 @@ impl Handle {
idx: idx, req: req, task:task, middlewares: mw }
}
fn poll_io<T: Writer>(&mut self, io: &mut T) -> Poll<bool, ()> {
fn poll_io<T: Writer>(&mut self, io: &mut T) -> Poll<bool, Error> {
self.task.poll_io(io, &mut self.req)
}
@ -262,8 +262,7 @@ impl Start {
if self.disconnected {
task.disconnected()
}
task.set_middlewares(
MiddlewaresResponse::new(self.idx, Rc::clone(&self.middlewares)));
task.set_middlewares(MiddlewaresResponse::new(Rc::clone(&self.middlewares)));
task
}
@ -366,16 +365,15 @@ impl Start {
/// Middlewares response executor
pub(crate) struct MiddlewaresResponse {
idx: usize,
fut: Option<Box<Future<Item=HttpResponse, Error=HttpResponse>>>,
fut: Option<Box<Future<Item=HttpResponse, Error=Error>>>,
middlewares: Rc<Vec<Box<Middleware>>>,
}
impl MiddlewaresResponse {
fn new(idx: usize, mw: Rc<Vec<Box<Middleware>>>) -> MiddlewaresResponse {
let idx = if idx == 0 { 0 } else { idx - 1 };
fn new(mw: Rc<Vec<Box<Middleware>>>) -> MiddlewaresResponse {
MiddlewaresResponse {
idx: idx,
idx: 0,
fut: None,
middlewares: mw }
}
@ -401,7 +399,7 @@ impl MiddlewaresResponse {
}
}
pub fn poll(&mut self, req: &mut HttpRequest) -> Poll<Option<HttpResponse>, ()> {
pub fn poll(&mut self, req: &mut HttpRequest) -> Poll<Option<HttpResponse>, Error> {
if self.fut.is_none() {
return Ok(Async::Ready(None))
}
@ -409,11 +407,13 @@ impl MiddlewaresResponse {
loop {
// poll latest fut
let mut resp = match self.fut.as_mut().unwrap().poll() {
Ok(Async::NotReady) => return Ok(Async::NotReady),
Ok(Async::Ready(resp)) | Err(resp) => {
Ok(Async::NotReady) =>
return Ok(Async::NotReady),
Ok(Async::Ready(resp)) => {
self.idx += 1;
resp
}
Err(err) => return Err(err)
};
loop {

42
src/task.rs
View file

@ -170,7 +170,7 @@ impl Task {
}
}
pub(crate) fn poll_io<T>(&mut self, io: &mut T, req: &mut HttpRequest) -> Poll<bool, ()>
pub(crate) fn poll_io<T>(&mut self, io: &mut T, req: &mut HttpRequest) -> Poll<bool, Error>
where T: Writer
{
trace!("POLL-IO frames:{:?}", self.frames.len());
@ -181,35 +181,30 @@ impl Task {
} else if self.drain.is_empty() {
// poll stream
if self.state == TaskRunningState::Running {
match self.poll() {
Ok(Async::Ready(_)) => {
match self.poll()? {
Async::Ready(_) => {
self.state = TaskRunningState::Done;
},
Ok(Async::NotReady) => (),
Err(_) => return Err(())
Async::NotReady => (),
}
}
// process middlewares response
if let Some(mut middlewares) = self.middlewares.take() {
match middlewares.poll(req) {
Err(_) => return Err(()),
Ok(Async::NotReady) => {
match middlewares.poll(req)? {
Async::NotReady => {
self.middlewares = Some(middlewares);
return Ok(Async::NotReady);
}
Ok(Async::Ready(None)) => {
Async::Ready(None) => {
self.middlewares = Some(middlewares);
}
Ok(Async::Ready(Some(mut response))) => {
let result = io.start(req, &mut response);
Async::Ready(Some(mut response)) => {
let result = io.start(req, &mut response)?;
self.prepared = Some(response);
match result {
Ok(WriterState::Pause) => {
self.state.pause();
}
Ok(WriterState::Done) => self.state.resume(),
Err(_) => return Err(())
WriterState::Pause => self.state.pause(),
WriterState::Done => self.state.resume(),
}
},
}
@ -225,7 +220,7 @@ impl Task {
// run middlewares
if let Some(mut middlewares) = self.middlewares.take() {
if let Some(mut resp) = middlewares.response(req, resp) {
let result = io.start(req, &mut resp);
let result = io.start(req, &mut resp)?;
self.prepared = Some(resp);
result
} else {
@ -234,17 +229,17 @@ impl Task {
return self.poll_io(io, req)
}
} else {
let result = io.start(req, &mut resp);
let result = io.start(req, &mut resp)?;
self.prepared = Some(resp);
result
}
}
Frame::Payload(Some(chunk)) => {
io.write(chunk.as_ref())
io.write(chunk.as_ref())?
},
Frame::Payload(None) => {
self.iostate = TaskIOState::Done;
io.write_eof()
io.write_eof()?
},
Frame::Drain(fut) => {
self.drain.push(fut);
@ -253,12 +248,11 @@ impl Task {
};
match res {
Ok(WriterState::Pause) => {
WriterState::Pause => {
self.state.pause();
break
}
Ok(WriterState::Done) => self.state.resume(),
Err(_) => return Err(())
WriterState::Done => self.state.resume(),
}
}
}
@ -272,7 +266,7 @@ impl Task {
}
Err(err) => {
debug!("Error sending data: {}", err);
return Err(())
return Err(err.into())
}
}