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Code Issues Releases Wiki Activity

add upgrade service support to h1 dispatcher

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This commit is contained in:
Nikolay Kim
2019-04-08 17:49:27 -07:00
parent 43d325a139
commit 561f83d044
6 changed files with 271 additions and 101 deletions
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21
actix-http/src/builder.rs
View File

@ -115,6 +115,27 @@ where
}
}
/// Provide service for custom `Connection: UPGRADE` support.
///
/// If service is provided then normal requests handling get halted
/// and this service get called with original request and framed object.
pub fn upgrade<F, U1>(self, upgrade: F) -> HttpServiceBuilder<T, S, X, U1>
where
F: IntoNewService<U1>,
U1: NewService<Request = (Request, Framed<T, Codec>), Response = ()>,
U1::Error: fmt::Display,
U1::InitError: fmt::Debug,
{
HttpServiceBuilder {
keep_alive: self.keep_alive,
client_timeout: self.client_timeout,
client_disconnect: self.client_disconnect,
expect: self.expect,
upgrade: Some(upgrade.into_new_service()),
_t: PhantomData,
}
}
/// Finish service configuration and create *http service* for HTTP/1 protocol.
pub fn h1<F, P, B>(self, service: F) -> H1Service<T, P, S, B, X, U>
where

3
actix-http/src/error.rs
View File

@ -350,6 +350,9 @@ pub enum DispatchError {
/// Service error
Service(Error),
/// Upgrade service error
Upgrade,
/// An `io::Error` that occurred while trying to read or write to a network
/// stream.
#[display(fmt = "IO error: {}", _0)]

259
actix-http/src/h1/dispatcher.rs
View File

@ -2,7 +2,7 @@ use std::collections::VecDeque;
use std::time::Instant;
use std::{fmt, io};
use actix_codec::{AsyncRead, AsyncWrite, Decoder, Encoder, Framed};
use actix_codec::{AsyncRead, AsyncWrite, Decoder, Encoder, Framed, FramedParts};
use actix_service::Service;
use actix_utils::cloneable::CloneableService;
use bitflags::bitflags;
@ -34,7 +34,7 @@ bitflags! {
const SHUTDOWN = 0b0000_1000;
const READ_DISCONNECT = 0b0001_0000;
const WRITE_DISCONNECT = 0b0010_0000;
const DROPPING = 0b0100_0000;
const UPGRADE = 0b0100_0000;
}
}
@ -49,7 +49,22 @@ where
U: Service<Request = (Request, Framed<T, Codec>), Response = ()>,
U::Error: fmt::Display,
{
inner: Option<InnerDispatcher<T, S, B, X, U>>,
inner: DispatcherState<T, S, B, X, U>,
}
enum DispatcherState<T, S, B, X, U>
where
S: Service<Request = Request>,
S::Error: Into<Error>,
B: MessageBody,
X: Service<Request = Request, Response = Request>,
X::Error: Into<Error>,
U: Service<Request = (Request, Framed<T, Codec>), Response = ()>,
U::Error: fmt::Display,
{
Normal(InnerDispatcher<T, S, B, X, U>),
Upgrade(U::Future),
None,
}
struct InnerDispatcher<T, S, B, X, U>
@ -83,6 +98,7 @@ where
enum DispatcherMessage {
Item(Request),
Upgrade(Request),
Error(Response<()>),
}
@ -121,18 +137,24 @@ where
}
}
impl<S, B, X> fmt::Debug for State<S, B, X>
where
S: Service<Request = Request>,
X: Service<Request = Request, Response = Request>,
B: MessageBody,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
enum PollResponse {
Upgrade(Request),
DoNothing,
DrainWriteBuf,
}
impl PartialEq for PollResponse {
fn eq(&self, other: &PollResponse) -> bool {
match self {
State::None => write!(f, "State::None"),
State::ExpectCall(_) => write!(f, "State::ExceptCall"),
State::ServiceCall(_) => write!(f, "State::ServiceCall"),
State::SendPayload(_) => write!(f, "State::SendPayload"),
PollResponse::DrainWriteBuf => match other {
PollResponse::DrainWriteBuf => true,
_ => false,
},
PollResponse::DoNothing => match other {
PollResponse::DoNothing => true,
_ => false,
},
_ => false,
}
}
}
@ -197,7 +219,7 @@ where
};
Dispatcher {
inner: Some(InnerDispatcher {
inner: DispatcherState::Normal(InnerDispatcher {
io,
codec,
read_buf,
@ -230,7 +252,10 @@ where
U::Error: fmt::Display,
{
fn can_read(&self) -> bool {
if self.flags.contains(Flags::READ_DISCONNECT) {
if self
.flags
.intersects(Flags::READ_DISCONNECT | Flags::UPGRADE)
{
false
} else if let Some(ref info) = self.payload {
info.need_read() == PayloadStatus::Read
@ -315,7 +340,7 @@ where
.extend_from_slice(b"HTTP/1.1 100 Continue\r\n\r\n");
}
fn poll_response(&mut self) -> Result<bool, DispatchError> {
fn poll_response(&mut self) -> Result<PollResponse, DispatchError> {
loop {
let state = match self.state {
State::None => match self.messages.pop_front() {
@ -325,6 +350,9 @@ where
Some(DispatcherMessage::Error(res)) => {
Some(self.send_response(res, ResponseBody::Other(Body::Empty))?)
}
Some(DispatcherMessage::Upgrade(req)) => {
return Ok(PollResponse::Upgrade(req));
}
None => None,
},
State::ExpectCall(ref mut fut) => match fut.poll() {
@ -374,10 +402,10 @@ where
)?;
self.state = State::None;
}
Async::NotReady => return Ok(false),
Async::NotReady => return Ok(PollResponse::DoNothing),
}
} else {
return Ok(true);
return Ok(PollResponse::DrainWriteBuf);
}
break;
}
@ -405,7 +433,7 @@ where
break;
}
Ok(false)
Ok(PollResponse::DoNothing)
}
fn handle_request(&mut self, req: Request) -> Result<State<S, B, X>, DispatchError> {
@ -461,15 +489,18 @@ where
match msg {
Message::Item(mut req) => {
match self.codec.message_type() {
MessageType::Payload | MessageType::Stream => {
let (ps, pl) = Payload::create(false);
let (req1, _) =
req.replace_payload(crate::Payload::H1(pl));
req = req1;
self.payload = Some(ps);
}
_ => (),
let pl = self.codec.message_type();
if pl == MessageType::Stream && self.upgrade.is_some() {
self.messages.push_back(DispatcherMessage::Upgrade(req));
break;
}
if pl == MessageType::Payload || pl == MessageType::Stream {
let (ps, pl) = Payload::create(false);
let (req1, _) =
req.replace_payload(crate::Payload::H1(pl));
req = req1;
self.payload = Some(ps);
}
// handle request early
@ -633,80 +664,112 @@ where
#[inline]
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
let inner = self.inner.as_mut().unwrap();
inner.poll_keepalive()?;
match self.inner {
DispatcherState::Normal(ref mut inner) => {
inner.poll_keepalive()?;
if inner.flags.contains(Flags::SHUTDOWN) {
if inner.flags.contains(Flags::WRITE_DISCONNECT) {
Ok(Async::Ready(()))
} else {
// flush buffer
inner.poll_flush()?;
if !inner.write_buf.is_empty() {
Ok(Async::NotReady)
if inner.flags.contains(Flags::SHUTDOWN) {
if inner.flags.contains(Flags::WRITE_DISCONNECT) {
Ok(Async::Ready(()))
} else {
// flush buffer
inner.poll_flush()?;
if !inner.write_buf.is_empty() {
Ok(Async::NotReady)
} else {
match inner.io.shutdown()? {
Async::Ready(_) => Ok(Async::Ready(())),
Async::NotReady => Ok(Async::NotReady),
}
}
}
} else {
match inner.io.shutdown()? {
Async::Ready(_) => Ok(Async::Ready(())),
Async::NotReady => Ok(Async::NotReady),
// read socket into a buf
if !inner.flags.contains(Flags::READ_DISCONNECT) {
if let Some(true) =
read_available(&mut inner.io, &mut inner.read_buf)?
{
inner.flags.insert(Flags::READ_DISCONNECT)
}
}
inner.poll_request()?;
loop {
if inner.write_buf.remaining_mut() < LW_BUFFER_SIZE {
inner.write_buf.reserve(HW_BUFFER_SIZE);
}
let result = inner.poll_response()?;
let drain = result == PollResponse::DrainWriteBuf;
// switch to upgrade handler
if let PollResponse::Upgrade(req) = result {
if let DispatcherState::Normal(inner) =
std::mem::replace(&mut self.inner, DispatcherState::None)
{
let mut parts = FramedParts::with_read_buf(
inner.io,
inner.codec,
inner.read_buf,
);
parts.write_buf = inner.write_buf;
let framed = Framed::from_parts(parts);
self.inner = DispatcherState::Upgrade(
inner.upgrade.unwrap().call((req, framed)),
);
return self.poll();
} else {
panic!()
}
}
// we didnt get WouldBlock from write operation,
// so data get written to kernel completely (OSX)
// and we have to write again otherwise response can get stuck
if inner.poll_flush()? || !drain {
break;
}
}
// client is gone
if inner.flags.contains(Flags::WRITE_DISCONNECT) {
return Ok(Async::Ready(()));
}
let is_empty = inner.state.is_empty();
// read half is closed and we do not processing any responses
if inner.flags.contains(Flags::READ_DISCONNECT) && is_empty {
inner.flags.insert(Flags::SHUTDOWN);
}
// keep-alive and stream errors
if is_empty && inner.write_buf.is_empty() {
if let Some(err) = inner.error.take() {
Err(err)
}
// disconnect if keep-alive is not enabled
else if inner.flags.contains(Flags::STARTED)
&& !inner.flags.intersects(Flags::KEEPALIVE)
{
inner.flags.insert(Flags::SHUTDOWN);
self.poll()
}
// disconnect if shutdown
else if inner.flags.contains(Flags::SHUTDOWN) {
self.poll()
} else {
Ok(Async::NotReady)
}
} else {
Ok(Async::NotReady)
}
}
}
} else {
// read socket into a buf
if !inner.flags.contains(Flags::READ_DISCONNECT) {
if let Some(true) = read_available(&mut inner.io, &mut inner.read_buf)? {
inner.flags.insert(Flags::READ_DISCONNECT)
}
}
inner.poll_request()?;
loop {
if inner.write_buf.remaining_mut() < LW_BUFFER_SIZE {
inner.write_buf.reserve(HW_BUFFER_SIZE);
}
let need_write = inner.poll_response()?;
// we didnt get WouldBlock from write operation,
// so data get written to kernel completely (OSX)
// and we have to write again otherwise response can get stuck
if inner.poll_flush()? || !need_write {
break;
}
}
// client is gone
if inner.flags.contains(Flags::WRITE_DISCONNECT) {
return Ok(Async::Ready(()));
}
let is_empty = inner.state.is_empty();
// read half is closed and we do not processing any responses
if inner.flags.contains(Flags::READ_DISCONNECT) && is_empty {
inner.flags.insert(Flags::SHUTDOWN);
}
// keep-alive and stream errors
if is_empty && inner.write_buf.is_empty() {
if let Some(err) = inner.error.take() {
Err(err)
}
// disconnect if keep-alive is not enabled
else if inner.flags.contains(Flags::STARTED)
&& !inner.flags.intersects(Flags::KEEPALIVE)
{
inner.flags.insert(Flags::SHUTDOWN);
self.poll()
}
// disconnect if shutdown
else if inner.flags.contains(Flags::SHUTDOWN) {
self.poll()
} else {
Ok(Async::NotReady)
}
} else {
Ok(Async::NotReady)
}
DispatcherState::Upgrade(ref mut fut) => fut.poll().map_err(|e| {
error!("Upgrade handler error: {}", e);
DispatchError::Upgrade
}),
DispatcherState::None => panic!(),
}
}
}