| use std::fmt; |
| use std::io; |
| use std::marker::PhantomData; |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| use std::time::Duration; |
| |
| use bytes::{Buf, Bytes}; |
| use http::header::{HeaderValue, CONNECTION}; |
| use http::{HeaderMap, Method, Version}; |
| use httparse::ParserConfig; |
| use tokio::io::{AsyncRead, AsyncWrite}; |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| use tokio::time::Sleep; |
| use tracing::{debug, error, trace}; |
| |
| use super::io::Buffered; |
| use super::{Decoder, Encode, EncodedBuf, Encoder, Http1Transaction, ParseContext, Wants}; |
| use crate::body::DecodedLength; |
| use crate::common::{task, Pin, Poll, Unpin}; |
| use crate::headers::connection_keep_alive; |
| use crate::proto::{BodyLength, MessageHead}; |
| |
| const H2_PREFACE: &[u8] = b"PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n"; |
| |
| /// This handles a connection, which will have been established over an |
| /// `AsyncRead + AsyncWrite` (like a socket), and will likely include multiple |
| /// `Transaction`s over HTTP. |
| /// |
| /// The connection will determine when a message begins and ends as well as |
| /// determine if this connection can be kept alive after the message, |
| /// or if it is complete. |
| pub(crate) struct Conn<I, B, T> { |
| io: Buffered<I, EncodedBuf<B>>, |
| state: State, |
| _marker: PhantomData<fn(T)>, |
| } |
| |
| impl<I, B, T> Conn<I, B, T> |
| where |
| I: AsyncRead + AsyncWrite + Unpin, |
| B: Buf, |
| T: Http1Transaction, |
| { |
| pub(crate) fn new(io: I) -> Conn<I, B, T> { |
| Conn { |
| io: Buffered::new(io), |
| state: State { |
| allow_half_close: false, |
| cached_headers: None, |
| error: None, |
| keep_alive: KA::Busy, |
| method: None, |
| h1_parser_config: ParserConfig::default(), |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| h1_header_read_timeout: None, |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| h1_header_read_timeout_fut: None, |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| h1_header_read_timeout_running: false, |
| preserve_header_case: false, |
| #[cfg(feature = "ffi")] |
| preserve_header_order: false, |
| title_case_headers: false, |
| h09_responses: false, |
| #[cfg(feature = "ffi")] |
| on_informational: None, |
| #[cfg(feature = "ffi")] |
| raw_headers: false, |
| notify_read: false, |
| reading: Reading::Init, |
| writing: Writing::Init, |
| upgrade: None, |
| // We assume a modern world where the remote speaks HTTP/1.1. |
| // If they tell us otherwise, we'll downgrade in `read_head`. |
| version: Version::HTTP_11, |
| }, |
| _marker: PhantomData, |
| } |
| } |
| |
| #[cfg(feature = "server")] |
| pub(crate) fn set_flush_pipeline(&mut self, enabled: bool) { |
| self.io.set_flush_pipeline(enabled); |
| } |
| |
| pub(crate) fn set_write_strategy_queue(&mut self) { |
| self.io.set_write_strategy_queue(); |
| } |
| |
| pub(crate) fn set_max_buf_size(&mut self, max: usize) { |
| self.io.set_max_buf_size(max); |
| } |
| |
| #[cfg(feature = "client")] |
| pub(crate) fn set_read_buf_exact_size(&mut self, sz: usize) { |
| self.io.set_read_buf_exact_size(sz); |
| } |
| |
| pub(crate) fn set_write_strategy_flatten(&mut self) { |
| self.io.set_write_strategy_flatten(); |
| } |
| |
| #[cfg(feature = "client")] |
| pub(crate) fn set_h1_parser_config(&mut self, parser_config: ParserConfig) { |
| self.state.h1_parser_config = parser_config; |
| } |
| |
| pub(crate) fn set_title_case_headers(&mut self) { |
| self.state.title_case_headers = true; |
| } |
| |
| pub(crate) fn set_preserve_header_case(&mut self) { |
| self.state.preserve_header_case = true; |
| } |
| |
| #[cfg(feature = "ffi")] |
| pub(crate) fn set_preserve_header_order(&mut self) { |
| self.state.preserve_header_order = true; |
| } |
| |
| #[cfg(feature = "client")] |
| pub(crate) fn set_h09_responses(&mut self) { |
| self.state.h09_responses = true; |
| } |
| |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| pub(crate) fn set_http1_header_read_timeout(&mut self, val: Duration) { |
| self.state.h1_header_read_timeout = Some(val); |
| } |
| |
| #[cfg(feature = "server")] |
| pub(crate) fn set_allow_half_close(&mut self) { |
| self.state.allow_half_close = true; |
| } |
| |
| #[cfg(feature = "ffi")] |
| pub(crate) fn set_raw_headers(&mut self, enabled: bool) { |
| self.state.raw_headers = enabled; |
| } |
| |
| pub(crate) fn into_inner(self) -> (I, Bytes) { |
| self.io.into_inner() |
| } |
| |
| pub(crate) fn pending_upgrade(&mut self) -> Option<crate::upgrade::Pending> { |
| self.state.upgrade.take() |
| } |
| |
| pub(crate) fn is_read_closed(&self) -> bool { |
| self.state.is_read_closed() |
| } |
| |
| pub(crate) fn is_write_closed(&self) -> bool { |
| self.state.is_write_closed() |
| } |
| |
| pub(crate) fn can_read_head(&self) -> bool { |
| if !matches!(self.state.reading, Reading::Init) { |
| return false; |
| } |
| |
| if T::should_read_first() { |
| return true; |
| } |
| |
| !matches!(self.state.writing, Writing::Init) |
| } |
| |
| pub(crate) fn can_read_body(&self) -> bool { |
| match self.state.reading { |
| Reading::Body(..) | Reading::Continue(..) => true, |
| _ => false, |
| } |
| } |
| |
| fn should_error_on_eof(&self) -> bool { |
| // If we're idle, it's probably just the connection closing gracefully. |
| T::should_error_on_parse_eof() && !self.state.is_idle() |
| } |
| |
| fn has_h2_prefix(&self) -> bool { |
| let read_buf = self.io.read_buf(); |
| read_buf.len() >= 24 && read_buf[..24] == *H2_PREFACE |
| } |
| |
| pub(super) fn poll_read_head( |
| &mut self, |
| cx: &mut task::Context<'_>, |
| ) -> Poll<Option<crate::Result<(MessageHead<T::Incoming>, DecodedLength, Wants)>>> { |
| debug_assert!(self.can_read_head()); |
| trace!("Conn::read_head"); |
| |
| let msg = match ready!(self.io.parse::<T>( |
| cx, |
| ParseContext { |
| cached_headers: &mut self.state.cached_headers, |
| req_method: &mut self.state.method, |
| h1_parser_config: self.state.h1_parser_config.clone(), |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| h1_header_read_timeout: self.state.h1_header_read_timeout, |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| h1_header_read_timeout_fut: &mut self.state.h1_header_read_timeout_fut, |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| h1_header_read_timeout_running: &mut self.state.h1_header_read_timeout_running, |
| preserve_header_case: self.state.preserve_header_case, |
| #[cfg(feature = "ffi")] |
| preserve_header_order: self.state.preserve_header_order, |
| h09_responses: self.state.h09_responses, |
| #[cfg(feature = "ffi")] |
| on_informational: &mut self.state.on_informational, |
| #[cfg(feature = "ffi")] |
| raw_headers: self.state.raw_headers, |
| } |
| )) { |
| Ok(msg) => msg, |
| Err(e) => return self.on_read_head_error(e), |
| }; |
| |
| // Note: don't deconstruct `msg` into local variables, it appears |
| // the optimizer doesn't remove the extra copies. |
| |
| debug!("incoming body is {}", msg.decode); |
| |
| // Prevent accepting HTTP/0.9 responses after the initial one, if any. |
| self.state.h09_responses = false; |
| |
| // Drop any OnInformational callbacks, we're done there! |
| #[cfg(feature = "ffi")] |
| { |
| self.state.on_informational = None; |
| } |
| |
| self.state.busy(); |
| self.state.keep_alive &= msg.keep_alive; |
| self.state.version = msg.head.version; |
| |
| let mut wants = if msg.wants_upgrade { |
| Wants::UPGRADE |
| } else { |
| Wants::EMPTY |
| }; |
| |
| if msg.decode == DecodedLength::ZERO { |
| if msg.expect_continue { |
| debug!("ignoring expect-continue since body is empty"); |
| } |
| self.state.reading = Reading::KeepAlive; |
| if !T::should_read_first() { |
| self.try_keep_alive(cx); |
| } |
| } else if msg.expect_continue { |
| self.state.reading = Reading::Continue(Decoder::new(msg.decode)); |
| wants = wants.add(Wants::EXPECT); |
| } else { |
| self.state.reading = Reading::Body(Decoder::new(msg.decode)); |
| } |
| |
| Poll::Ready(Some(Ok((msg.head, msg.decode, wants)))) |
| } |
| |
| fn on_read_head_error<Z>(&mut self, e: crate::Error) -> Poll<Option<crate::Result<Z>>> { |
| // If we are currently waiting on a message, then an empty |
| // message should be reported as an error. If not, it is just |
| // the connection closing gracefully. |
| let must_error = self.should_error_on_eof(); |
| self.close_read(); |
| self.io.consume_leading_lines(); |
| let was_mid_parse = e.is_parse() || !self.io.read_buf().is_empty(); |
| if was_mid_parse || must_error { |
| // We check if the buf contains the h2 Preface |
| debug!( |
| "parse error ({}) with {} bytes", |
| e, |
| self.io.read_buf().len() |
| ); |
| match self.on_parse_error(e) { |
| Ok(()) => Poll::Pending, // XXX: wat? |
| Err(e) => Poll::Ready(Some(Err(e))), |
| } |
| } else { |
| debug!("read eof"); |
| self.close_write(); |
| Poll::Ready(None) |
| } |
| } |
| |
| pub(crate) fn poll_read_body( |
| &mut self, |
| cx: &mut task::Context<'_>, |
| ) -> Poll<Option<io::Result<Bytes>>> { |
| debug_assert!(self.can_read_body()); |
| |
| let (reading, ret) = match self.state.reading { |
| Reading::Body(ref mut decoder) => { |
| match ready!(decoder.decode(cx, &mut self.io)) { |
| Ok(slice) => { |
| let (reading, chunk) = if decoder.is_eof() { |
| debug!("incoming body completed"); |
| ( |
| Reading::KeepAlive, |
| if !slice.is_empty() { |
| Some(Ok(slice)) |
| } else { |
| None |
| }, |
| ) |
| } else if slice.is_empty() { |
| error!("incoming body unexpectedly ended"); |
| // This should be unreachable, since all 3 decoders |
| // either set eof=true or return an Err when reading |
| // an empty slice... |
| (Reading::Closed, None) |
| } else { |
| return Poll::Ready(Some(Ok(slice))); |
| }; |
| (reading, Poll::Ready(chunk)) |
| } |
| Err(e) => { |
| debug!("incoming body decode error: {}", e); |
| (Reading::Closed, Poll::Ready(Some(Err(e)))) |
| } |
| } |
| } |
| Reading::Continue(ref decoder) => { |
| // Write the 100 Continue if not already responded... |
| if let Writing::Init = self.state.writing { |
| trace!("automatically sending 100 Continue"); |
| let cont = b"HTTP/1.1 100 Continue\r\n\r\n"; |
| self.io.headers_buf().extend_from_slice(cont); |
| } |
| |
| // And now recurse once in the Reading::Body state... |
| self.state.reading = Reading::Body(decoder.clone()); |
| return self.poll_read_body(cx); |
| } |
| _ => unreachable!("poll_read_body invalid state: {:?}", self.state.reading), |
| }; |
| |
| self.state.reading = reading; |
| self.try_keep_alive(cx); |
| ret |
| } |
| |
| pub(crate) fn wants_read_again(&mut self) -> bool { |
| let ret = self.state.notify_read; |
| self.state.notify_read = false; |
| ret |
| } |
| |
| pub(crate) fn poll_read_keep_alive( |
| &mut self, |
| cx: &mut task::Context<'_>, |
| ) -> Poll<crate::Result<()>> { |
| debug_assert!(!self.can_read_head() && !self.can_read_body()); |
| |
| if self.is_read_closed() { |
| Poll::Pending |
| } else if self.is_mid_message() { |
| self.mid_message_detect_eof(cx) |
| } else { |
| self.require_empty_read(cx) |
| } |
| } |
| |
| fn is_mid_message(&self) -> bool { |
| !matches!( |
| (&self.state.reading, &self.state.writing), |
| (&Reading::Init, &Writing::Init) |
| ) |
| } |
| |
| // This will check to make sure the io object read is empty. |
| // |
| // This should only be called for Clients wanting to enter the idle |
| // state. |
| fn require_empty_read(&mut self, cx: &mut task::Context<'_>) -> Poll<crate::Result<()>> { |
| debug_assert!(!self.can_read_head() && !self.can_read_body() && !self.is_read_closed()); |
| debug_assert!(!self.is_mid_message()); |
| debug_assert!(T::is_client()); |
| |
| if !self.io.read_buf().is_empty() { |
| debug!("received an unexpected {} bytes", self.io.read_buf().len()); |
| return Poll::Ready(Err(crate::Error::new_unexpected_message())); |
| } |
| |
| let num_read = ready!(self.force_io_read(cx)).map_err(crate::Error::new_io)?; |
| |
| if num_read == 0 { |
| let ret = if self.should_error_on_eof() { |
| trace!("found unexpected EOF on busy connection: {:?}", self.state); |
| Poll::Ready(Err(crate::Error::new_incomplete())) |
| } else { |
| trace!("found EOF on idle connection, closing"); |
| Poll::Ready(Ok(())) |
| }; |
| |
| // order is important: should_error needs state BEFORE close_read |
| self.state.close_read(); |
| return ret; |
| } |
| |
| debug!( |
| "received unexpected {} bytes on an idle connection", |
| num_read |
| ); |
| Poll::Ready(Err(crate::Error::new_unexpected_message())) |
| } |
| |
| fn mid_message_detect_eof(&mut self, cx: &mut task::Context<'_>) -> Poll<crate::Result<()>> { |
| debug_assert!(!self.can_read_head() && !self.can_read_body() && !self.is_read_closed()); |
| debug_assert!(self.is_mid_message()); |
| |
| if self.state.allow_half_close || !self.io.read_buf().is_empty() { |
| return Poll::Pending; |
| } |
| |
| let num_read = ready!(self.force_io_read(cx)).map_err(crate::Error::new_io)?; |
| |
| if num_read == 0 { |
| trace!("found unexpected EOF on busy connection: {:?}", self.state); |
| self.state.close_read(); |
| Poll::Ready(Err(crate::Error::new_incomplete())) |
| } else { |
| Poll::Ready(Ok(())) |
| } |
| } |
| |
| fn force_io_read(&mut self, cx: &mut task::Context<'_>) -> Poll<io::Result<usize>> { |
| debug_assert!(!self.state.is_read_closed()); |
| |
| let result = ready!(self.io.poll_read_from_io(cx)); |
| Poll::Ready(result.map_err(|e| { |
| trace!("force_io_read; io error = {:?}", e); |
| self.state.close(); |
| e |
| })) |
| } |
| |
| fn maybe_notify(&mut self, cx: &mut task::Context<'_>) { |
| // its possible that we returned NotReady from poll() without having |
| // exhausted the underlying Io. We would have done this when we |
| // determined we couldn't keep reading until we knew how writing |
| // would finish. |
| |
| match self.state.reading { |
| Reading::Continue(..) | Reading::Body(..) | Reading::KeepAlive | Reading::Closed => { |
| return |
| } |
| Reading::Init => (), |
| }; |
| |
| match self.state.writing { |
| Writing::Body(..) => return, |
| Writing::Init | Writing::KeepAlive | Writing::Closed => (), |
| } |
| |
| if !self.io.is_read_blocked() { |
| if self.io.read_buf().is_empty() { |
| match self.io.poll_read_from_io(cx) { |
| Poll::Ready(Ok(n)) => { |
| if n == 0 { |
| trace!("maybe_notify; read eof"); |
| if self.state.is_idle() { |
| self.state.close(); |
| } else { |
| self.close_read() |
| } |
| return; |
| } |
| } |
| Poll::Pending => { |
| trace!("maybe_notify; read_from_io blocked"); |
| return; |
| } |
| Poll::Ready(Err(e)) => { |
| trace!("maybe_notify; read_from_io error: {}", e); |
| self.state.close(); |
| self.state.error = Some(crate::Error::new_io(e)); |
| } |
| } |
| } |
| self.state.notify_read = true; |
| } |
| } |
| |
| fn try_keep_alive(&mut self, cx: &mut task::Context<'_>) { |
| self.state.try_keep_alive::<T>(); |
| self.maybe_notify(cx); |
| } |
| |
| pub(crate) fn can_write_head(&self) -> bool { |
| if !T::should_read_first() && matches!(self.state.reading, Reading::Closed) { |
| return false; |
| } |
| |
| match self.state.writing { |
| Writing::Init => self.io.can_headers_buf(), |
| _ => false, |
| } |
| } |
| |
| pub(crate) fn can_write_body(&self) -> bool { |
| match self.state.writing { |
| Writing::Body(..) => true, |
| Writing::Init | Writing::KeepAlive | Writing::Closed => false, |
| } |
| } |
| |
| pub(crate) fn can_buffer_body(&self) -> bool { |
| self.io.can_buffer() |
| } |
| |
| pub(crate) fn write_head(&mut self, head: MessageHead<T::Outgoing>, body: Option<BodyLength>) { |
| if let Some(encoder) = self.encode_head(head, body) { |
| self.state.writing = if !encoder.is_eof() { |
| Writing::Body(encoder) |
| } else if encoder.is_last() { |
| Writing::Closed |
| } else { |
| Writing::KeepAlive |
| }; |
| } |
| } |
| |
| pub(crate) fn write_full_msg(&mut self, head: MessageHead<T::Outgoing>, body: B) { |
| if let Some(encoder) = |
| self.encode_head(head, Some(BodyLength::Known(body.remaining() as u64))) |
| { |
| let is_last = encoder.is_last(); |
| // Make sure we don't write a body if we weren't actually allowed |
| // to do so, like because its a HEAD request. |
| if !encoder.is_eof() { |
| encoder.danger_full_buf(body, self.io.write_buf()); |
| } |
| self.state.writing = if is_last { |
| Writing::Closed |
| } else { |
| Writing::KeepAlive |
| } |
| } |
| } |
| |
| fn encode_head( |
| &mut self, |
| mut head: MessageHead<T::Outgoing>, |
| body: Option<BodyLength>, |
| ) -> Option<Encoder> { |
| debug_assert!(self.can_write_head()); |
| |
| if !T::should_read_first() { |
| self.state.busy(); |
| } |
| |
| self.enforce_version(&mut head); |
| |
| let buf = self.io.headers_buf(); |
| match super::role::encode_headers::<T>( |
| Encode { |
| head: &mut head, |
| body, |
| #[cfg(feature = "server")] |
| keep_alive: self.state.wants_keep_alive(), |
| req_method: &mut self.state.method, |
| title_case_headers: self.state.title_case_headers, |
| }, |
| buf, |
| ) { |
| Ok(encoder) => { |
| debug_assert!(self.state.cached_headers.is_none()); |
| debug_assert!(head.headers.is_empty()); |
| self.state.cached_headers = Some(head.headers); |
| |
| #[cfg(feature = "ffi")] |
| { |
| self.state.on_informational = |
| head.extensions.remove::<crate::ffi::OnInformational>(); |
| } |
| |
| Some(encoder) |
| } |
| Err(err) => { |
| self.state.error = Some(err); |
| self.state.writing = Writing::Closed; |
| None |
| } |
| } |
| } |
| |
| // Fix keep-alive when Connection: keep-alive header is not present |
| fn fix_keep_alive(&mut self, head: &mut MessageHead<T::Outgoing>) { |
| let outgoing_is_keep_alive = head |
| .headers |
| .get(CONNECTION) |
| .map(connection_keep_alive) |
| .unwrap_or(false); |
| |
| if !outgoing_is_keep_alive { |
| match head.version { |
| // If response is version 1.0 and keep-alive is not present in the response, |
| // disable keep-alive so the server closes the connection |
| Version::HTTP_10 => self.state.disable_keep_alive(), |
| // If response is version 1.1 and keep-alive is wanted, add |
| // Connection: keep-alive header when not present |
| Version::HTTP_11 => { |
| if self.state.wants_keep_alive() { |
| head.headers |
| .insert(CONNECTION, HeaderValue::from_static("keep-alive")); |
| } |
| } |
| _ => (), |
| } |
| } |
| } |
| |
| // If we know the remote speaks an older version, we try to fix up any messages |
| // to work with our older peer. |
| fn enforce_version(&mut self, head: &mut MessageHead<T::Outgoing>) { |
| if let Version::HTTP_10 = self.state.version { |
| // Fixes response or connection when keep-alive header is not present |
| self.fix_keep_alive(head); |
| // If the remote only knows HTTP/1.0, we should force ourselves |
| // to do only speak HTTP/1.0 as well. |
| head.version = Version::HTTP_10; |
| } |
| // If the remote speaks HTTP/1.1, then it *should* be fine with |
| // both HTTP/1.0 and HTTP/1.1 from us. So again, we just let |
| // the user's headers be. |
| } |
| |
| pub(crate) fn write_body(&mut self, chunk: B) { |
| debug_assert!(self.can_write_body() && self.can_buffer_body()); |
| // empty chunks should be discarded at Dispatcher level |
| debug_assert!(chunk.remaining() != 0); |
| |
| let state = match self.state.writing { |
| Writing::Body(ref mut encoder) => { |
| self.io.buffer(encoder.encode(chunk)); |
| |
| if !encoder.is_eof() { |
| return; |
| } |
| |
| if encoder.is_last() { |
| Writing::Closed |
| } else { |
| Writing::KeepAlive |
| } |
| } |
| _ => unreachable!("write_body invalid state: {:?}", self.state.writing), |
| }; |
| |
| self.state.writing = state; |
| } |
| |
| pub(crate) fn write_body_and_end(&mut self, chunk: B) { |
| debug_assert!(self.can_write_body() && self.can_buffer_body()); |
| // empty chunks should be discarded at Dispatcher level |
| debug_assert!(chunk.remaining() != 0); |
| |
| let state = match self.state.writing { |
| Writing::Body(ref encoder) => { |
| let can_keep_alive = encoder.encode_and_end(chunk, self.io.write_buf()); |
| if can_keep_alive { |
| Writing::KeepAlive |
| } else { |
| Writing::Closed |
| } |
| } |
| _ => unreachable!("write_body invalid state: {:?}", self.state.writing), |
| }; |
| |
| self.state.writing = state; |
| } |
| |
| pub(crate) fn end_body(&mut self) -> crate::Result<()> { |
| debug_assert!(self.can_write_body()); |
| |
| let encoder = match self.state.writing { |
| Writing::Body(ref mut enc) => enc, |
| _ => return Ok(()), |
| }; |
| |
| // end of stream, that means we should try to eof |
| match encoder.end() { |
| Ok(end) => { |
| if let Some(end) = end { |
| self.io.buffer(end); |
| } |
| |
| self.state.writing = if encoder.is_last() || encoder.is_close_delimited() { |
| Writing::Closed |
| } else { |
| Writing::KeepAlive |
| }; |
| |
| Ok(()) |
| } |
| Err(not_eof) => { |
| self.state.writing = Writing::Closed; |
| Err(crate::Error::new_body_write_aborted().with(not_eof)) |
| } |
| } |
| } |
| |
| // When we get a parse error, depending on what side we are, we might be able |
| // to write a response before closing the connection. |
| // |
| // - Client: there is nothing we can do |
| // - Server: if Response hasn't been written yet, we can send a 4xx response |
| fn on_parse_error(&mut self, err: crate::Error) -> crate::Result<()> { |
| if let Writing::Init = self.state.writing { |
| if self.has_h2_prefix() { |
| return Err(crate::Error::new_version_h2()); |
| } |
| if let Some(msg) = T::on_error(&err) { |
| // Drop the cached headers so as to not trigger a debug |
| // assert in `write_head`... |
| self.state.cached_headers.take(); |
| self.write_head(msg, None); |
| self.state.error = Some(err); |
| return Ok(()); |
| } |
| } |
| |
| // fallback is pass the error back up |
| Err(err) |
| } |
| |
| pub(crate) fn poll_flush(&mut self, cx: &mut task::Context<'_>) -> Poll<io::Result<()>> { |
| ready!(Pin::new(&mut self.io).poll_flush(cx))?; |
| self.try_keep_alive(cx); |
| trace!("flushed({}): {:?}", T::LOG, self.state); |
| Poll::Ready(Ok(())) |
| } |
| |
| pub(crate) fn poll_shutdown(&mut self, cx: &mut task::Context<'_>) -> Poll<io::Result<()>> { |
| match ready!(Pin::new(self.io.io_mut()).poll_shutdown(cx)) { |
| Ok(()) => { |
| trace!("shut down IO complete"); |
| Poll::Ready(Ok(())) |
| } |
| Err(e) => { |
| debug!("error shutting down IO: {}", e); |
| Poll::Ready(Err(e)) |
| } |
| } |
| } |
| |
| /// If the read side can be cheaply drained, do so. Otherwise, close. |
| pub(super) fn poll_drain_or_close_read(&mut self, cx: &mut task::Context<'_>) { |
| let _ = self.poll_read_body(cx); |
| |
| // If still in Reading::Body, just give up |
| match self.state.reading { |
| Reading::Init | Reading::KeepAlive => trace!("body drained"), |
| _ => self.close_read(), |
| } |
| } |
| |
| pub(crate) fn close_read(&mut self) { |
| self.state.close_read(); |
| } |
| |
| pub(crate) fn close_write(&mut self) { |
| self.state.close_write(); |
| } |
| |
| #[cfg(feature = "server")] |
| pub(crate) fn disable_keep_alive(&mut self) { |
| if self.state.is_idle() { |
| trace!("disable_keep_alive; closing idle connection"); |
| self.state.close(); |
| } else { |
| trace!("disable_keep_alive; in-progress connection"); |
| self.state.disable_keep_alive(); |
| } |
| } |
| |
| pub(crate) fn take_error(&mut self) -> crate::Result<()> { |
| if let Some(err) = self.state.error.take() { |
| Err(err) |
| } else { |
| Ok(()) |
| } |
| } |
| |
| pub(super) fn on_upgrade(&mut self) -> crate::upgrade::OnUpgrade { |
| trace!("{}: prepare possible HTTP upgrade", T::LOG); |
| self.state.prepare_upgrade() |
| } |
| } |
| |
| impl<I, B: Buf, T> fmt::Debug for Conn<I, B, T> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| f.debug_struct("Conn") |
| .field("state", &self.state) |
| .field("io", &self.io) |
| .finish() |
| } |
| } |
| |
| // B and T are never pinned |
| impl<I: Unpin, B, T> Unpin for Conn<I, B, T> {} |
| |
| struct State { |
| allow_half_close: bool, |
| /// Re-usable HeaderMap to reduce allocating new ones. |
| cached_headers: Option<HeaderMap>, |
| /// If an error occurs when there wasn't a direct way to return it |
| /// back to the user, this is set. |
| error: Option<crate::Error>, |
| /// Current keep-alive status. |
| keep_alive: KA, |
| /// If mid-message, the HTTP Method that started it. |
| /// |
| /// This is used to know things such as if the message can include |
| /// a body or not. |
| method: Option<Method>, |
| h1_parser_config: ParserConfig, |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| h1_header_read_timeout: Option<Duration>, |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| h1_header_read_timeout_fut: Option<Pin<Box<Sleep>>>, |
| #[cfg(all(feature = "server", feature = "runtime"))] |
| h1_header_read_timeout_running: bool, |
| preserve_header_case: bool, |
| #[cfg(feature = "ffi")] |
| preserve_header_order: bool, |
| title_case_headers: bool, |
| h09_responses: bool, |
| /// If set, called with each 1xx informational response received for |
| /// the current request. MUST be unset after a non-1xx response is |
| /// received. |
| #[cfg(feature = "ffi")] |
| on_informational: Option<crate::ffi::OnInformational>, |
| #[cfg(feature = "ffi")] |
| raw_headers: bool, |
| /// Set to true when the Dispatcher should poll read operations |
| /// again. See the `maybe_notify` method for more. |
| notify_read: bool, |
| /// State of allowed reads |
| reading: Reading, |
| /// State of allowed writes |
| writing: Writing, |
| /// An expected pending HTTP upgrade. |
| upgrade: Option<crate::upgrade::Pending>, |
| /// Either HTTP/1.0 or 1.1 connection |
| version: Version, |
| } |
| |
| #[derive(Debug)] |
| enum Reading { |
| Init, |
| Continue(Decoder), |
| Body(Decoder), |
| KeepAlive, |
| Closed, |
| } |
| |
| enum Writing { |
| Init, |
| Body(Encoder), |
| KeepAlive, |
| Closed, |
| } |
| |
| impl fmt::Debug for State { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| let mut builder = f.debug_struct("State"); |
| builder |
| .field("reading", &self.reading) |
| .field("writing", &self.writing) |
| .field("keep_alive", &self.keep_alive); |
| |
| // Only show error field if it's interesting... |
| if let Some(ref error) = self.error { |
| builder.field("error", error); |
| } |
| |
| if self.allow_half_close { |
| builder.field("allow_half_close", &true); |
| } |
| |
| // Purposefully leaving off other fields.. |
| |
| builder.finish() |
| } |
| } |
| |
| impl fmt::Debug for Writing { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| match *self { |
| Writing::Init => f.write_str("Init"), |
| Writing::Body(ref enc) => f.debug_tuple("Body").field(enc).finish(), |
| Writing::KeepAlive => f.write_str("KeepAlive"), |
| Writing::Closed => f.write_str("Closed"), |
| } |
| } |
| } |
| |
| impl std::ops::BitAndAssign<bool> for KA { |
| fn bitand_assign(&mut self, enabled: bool) { |
| if !enabled { |
| trace!("remote disabling keep-alive"); |
| *self = KA::Disabled; |
| } |
| } |
| } |
| |
| #[derive(Clone, Copy, Debug)] |
| enum KA { |
| Idle, |
| Busy, |
| Disabled, |
| } |
| |
| impl Default for KA { |
| fn default() -> KA { |
| KA::Busy |
| } |
| } |
| |
| impl KA { |
| fn idle(&mut self) { |
| *self = KA::Idle; |
| } |
| |
| fn busy(&mut self) { |
| *self = KA::Busy; |
| } |
| |
| fn disable(&mut self) { |
| *self = KA::Disabled; |
| } |
| |
| fn status(&self) -> KA { |
| *self |
| } |
| } |
| |
| impl State { |
| fn close(&mut self) { |
| trace!("State::close()"); |
| self.reading = Reading::Closed; |
| self.writing = Writing::Closed; |
| self.keep_alive.disable(); |
| } |
| |
| fn close_read(&mut self) { |
| trace!("State::close_read()"); |
| self.reading = Reading::Closed; |
| self.keep_alive.disable(); |
| } |
| |
| fn close_write(&mut self) { |
| trace!("State::close_write()"); |
| self.writing = Writing::Closed; |
| self.keep_alive.disable(); |
| } |
| |
| fn wants_keep_alive(&self) -> bool { |
| if let KA::Disabled = self.keep_alive.status() { |
| false |
| } else { |
| true |
| } |
| } |
| |
| fn try_keep_alive<T: Http1Transaction>(&mut self) { |
| match (&self.reading, &self.writing) { |
| (&Reading::KeepAlive, &Writing::KeepAlive) => { |
| if let KA::Busy = self.keep_alive.status() { |
| self.idle::<T>(); |
| } else { |
| trace!( |
| "try_keep_alive({}): could keep-alive, but status = {:?}", |
| T::LOG, |
| self.keep_alive |
| ); |
| self.close(); |
| } |
| } |
| (&Reading::Closed, &Writing::KeepAlive) | (&Reading::KeepAlive, &Writing::Closed) => { |
| self.close() |
| } |
| _ => (), |
| } |
| } |
| |
| fn disable_keep_alive(&mut self) { |
| self.keep_alive.disable() |
| } |
| |
| fn busy(&mut self) { |
| if let KA::Disabled = self.keep_alive.status() { |
| return; |
| } |
| self.keep_alive.busy(); |
| } |
| |
| fn idle<T: Http1Transaction>(&mut self) { |
| debug_assert!(!self.is_idle(), "State::idle() called while idle"); |
| |
| self.method = None; |
| self.keep_alive.idle(); |
| |
| if !self.is_idle() { |
| self.close(); |
| return; |
| } |
| |
| self.reading = Reading::Init; |
| self.writing = Writing::Init; |
| |
| // !T::should_read_first() means Client. |
| // |
| // If Client connection has just gone idle, the Dispatcher |
| // should try the poll loop one more time, so as to poll the |
| // pending requests stream. |
| if !T::should_read_first() { |
| self.notify_read = true; |
| } |
| } |
| |
| fn is_idle(&self) -> bool { |
| matches!(self.keep_alive.status(), KA::Idle) |
| } |
| |
| fn is_read_closed(&self) -> bool { |
| matches!(self.reading, Reading::Closed) |
| } |
| |
| fn is_write_closed(&self) -> bool { |
| matches!(self.writing, Writing::Closed) |
| } |
| |
| fn prepare_upgrade(&mut self) -> crate::upgrade::OnUpgrade { |
| let (tx, rx) = crate::upgrade::pending(); |
| self.upgrade = Some(tx); |
| rx |
| } |
| } |
| |
| #[cfg(test)] |
| mod tests { |
| #[cfg(feature = "nightly")] |
| #[bench] |
| fn bench_read_head_short(b: &mut ::test::Bencher) { |
| use super::*; |
| let s = b"GET / HTTP/1.1\r\nHost: localhost:8080\r\n\r\n"; |
| let len = s.len(); |
| b.bytes = len as u64; |
| |
| // an empty IO, we'll be skipping and using the read buffer anyways |
| let io = tokio_test::io::Builder::new().build(); |
| let mut conn = Conn::<_, bytes::Bytes, crate::proto::h1::ServerTransaction>::new(io); |
| *conn.io.read_buf_mut() = ::bytes::BytesMut::from(&s[..]); |
| conn.state.cached_headers = Some(HeaderMap::with_capacity(2)); |
| |
| let rt = tokio::runtime::Builder::new_current_thread() |
| .enable_all() |
| .build() |
| .unwrap(); |
| |
| b.iter(|| { |
| rt.block_on(futures_util::future::poll_fn(|cx| { |
| match conn.poll_read_head(cx) { |
| Poll::Ready(Some(Ok(x))) => { |
| ::test::black_box(&x); |
| let mut headers = x.0.headers; |
| headers.clear(); |
| conn.state.cached_headers = Some(headers); |
| } |
| f => panic!("expected Ready(Some(Ok(..))): {:?}", f), |
| } |
| |
| conn.io.read_buf_mut().reserve(1); |
| unsafe { |
| conn.io.read_buf_mut().set_len(len); |
| } |
| conn.state.reading = Reading::Init; |
| Poll::Ready(()) |
| })); |
| }); |
| } |
| |
| /* |
| //TODO: rewrite these using dispatch... someday... |
| use futures::{Async, Future, Stream, Sink}; |
| use futures::future; |
| |
| use proto::{self, ClientTransaction, MessageHead, ServerTransaction}; |
| use super::super::Encoder; |
| use mock::AsyncIo; |
| |
| use super::{Conn, Decoder, Reading, Writing}; |
| use ::uri::Uri; |
| |
| use std::str::FromStr; |
| |
| #[test] |
| fn test_conn_init_read() { |
| let good_message = b"GET / HTTP/1.1\r\n\r\n".to_vec(); |
| let len = good_message.len(); |
| let io = AsyncIo::new_buf(good_message, len); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| |
| match conn.poll().unwrap() { |
| Async::Ready(Some(Frame::Message { message, body: false })) => { |
| assert_eq!(message, MessageHead { |
| subject: ::proto::RequestLine(::Get, Uri::from_str("/").unwrap()), |
| .. MessageHead::default() |
| }) |
| }, |
| f => panic!("frame is not Frame::Message: {:?}", f) |
| } |
| } |
| |
| #[test] |
| fn test_conn_parse_partial() { |
| let _: Result<(), ()> = future::lazy(|| { |
| let good_message = b"GET / HTTP/1.1\r\nHost: foo.bar\r\n\r\n".to_vec(); |
| let io = AsyncIo::new_buf(good_message, 10); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| assert!(conn.poll().unwrap().is_not_ready()); |
| conn.io.io_mut().block_in(50); |
| let async = conn.poll().unwrap(); |
| assert!(async.is_ready()); |
| match async { |
| Async::Ready(Some(Frame::Message { .. })) => (), |
| f => panic!("frame is not Message: {:?}", f), |
| } |
| Ok(()) |
| }).wait(); |
| } |
| |
| #[test] |
| fn test_conn_init_read_eof_idle() { |
| let io = AsyncIo::new_buf(vec![], 1); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.idle(); |
| |
| match conn.poll().unwrap() { |
| Async::Ready(None) => {}, |
| other => panic!("frame is not None: {:?}", other) |
| } |
| } |
| |
| #[test] |
| fn test_conn_init_read_eof_idle_partial_parse() { |
| let io = AsyncIo::new_buf(b"GET / HTTP/1.1".to_vec(), 100); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.idle(); |
| |
| match conn.poll() { |
| Err(ref err) if err.kind() == std::io::ErrorKind::UnexpectedEof => {}, |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| } |
| |
| #[test] |
| fn test_conn_init_read_eof_busy() { |
| let _: Result<(), ()> = future::lazy(|| { |
| // server ignores |
| let io = AsyncIo::new_eof(); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.busy(); |
| |
| match conn.poll().unwrap() { |
| Async::Ready(None) => {}, |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| |
| // client |
| let io = AsyncIo::new_eof(); |
| let mut conn = Conn::<_, proto::Bytes, ClientTransaction>::new(io); |
| conn.state.busy(); |
| |
| match conn.poll() { |
| Err(ref err) if err.kind() == std::io::ErrorKind::UnexpectedEof => {}, |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| Ok(()) |
| }).wait(); |
| } |
| |
| #[test] |
| fn test_conn_body_finish_read_eof() { |
| let _: Result<(), ()> = future::lazy(|| { |
| let io = AsyncIo::new_eof(); |
| let mut conn = Conn::<_, proto::Bytes, ClientTransaction>::new(io); |
| conn.state.busy(); |
| conn.state.writing = Writing::KeepAlive; |
| conn.state.reading = Reading::Body(Decoder::length(0)); |
| |
| match conn.poll() { |
| Ok(Async::Ready(Some(Frame::Body { chunk: None }))) => (), |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| |
| // conn eofs, but tokio-proto will call poll() again, before calling flush() |
| // the conn eof in this case is perfectly fine |
| |
| match conn.poll() { |
| Ok(Async::Ready(None)) => (), |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| Ok(()) |
| }).wait(); |
| } |
| |
| #[test] |
| fn test_conn_message_empty_body_read_eof() { |
| let _: Result<(), ()> = future::lazy(|| { |
| let io = AsyncIo::new_buf(b"HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n".to_vec(), 1024); |
| let mut conn = Conn::<_, proto::Bytes, ClientTransaction>::new(io); |
| conn.state.busy(); |
| conn.state.writing = Writing::KeepAlive; |
| |
| match conn.poll() { |
| Ok(Async::Ready(Some(Frame::Message { body: false, .. }))) => (), |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| |
| // conn eofs, but tokio-proto will call poll() again, before calling flush() |
| // the conn eof in this case is perfectly fine |
| |
| match conn.poll() { |
| Ok(Async::Ready(None)) => (), |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| Ok(()) |
| }).wait(); |
| } |
| |
| #[test] |
| fn test_conn_read_body_end() { |
| let _: Result<(), ()> = future::lazy(|| { |
| let io = AsyncIo::new_buf(b"POST / HTTP/1.1\r\nContent-Length: 5\r\n\r\n12345".to_vec(), 1024); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.busy(); |
| |
| match conn.poll() { |
| Ok(Async::Ready(Some(Frame::Message { body: true, .. }))) => (), |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| |
| match conn.poll() { |
| Ok(Async::Ready(Some(Frame::Body { chunk: Some(_) }))) => (), |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| |
| // When the body is done, `poll` MUST return a `Body` frame with chunk set to `None` |
| match conn.poll() { |
| Ok(Async::Ready(Some(Frame::Body { chunk: None }))) => (), |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| |
| match conn.poll() { |
| Ok(Async::NotReady) => (), |
| other => panic!("unexpected frame: {:?}", other) |
| } |
| Ok(()) |
| }).wait(); |
| } |
| |
| #[test] |
| fn test_conn_closed_read() { |
| let io = AsyncIo::new_buf(vec![], 0); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.close(); |
| |
| match conn.poll().unwrap() { |
| Async::Ready(None) => {}, |
| other => panic!("frame is not None: {:?}", other) |
| } |
| } |
| |
| #[test] |
| fn test_conn_body_write_length() { |
| let _ = pretty_env_logger::try_init(); |
| let _: Result<(), ()> = future::lazy(|| { |
| let io = AsyncIo::new_buf(vec![], 0); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| let max = super::super::io::DEFAULT_MAX_BUFFER_SIZE + 4096; |
| conn.state.writing = Writing::Body(Encoder::length((max * 2) as u64)); |
| |
| assert!(conn.start_send(Frame::Body { chunk: Some(vec![b'a'; max].into()) }).unwrap().is_ready()); |
| assert!(!conn.can_buffer_body()); |
| |
| assert!(conn.start_send(Frame::Body { chunk: Some(vec![b'b'; 1024 * 8].into()) }).unwrap().is_not_ready()); |
| |
| conn.io.io_mut().block_in(1024 * 3); |
| assert!(conn.poll_complete().unwrap().is_not_ready()); |
| conn.io.io_mut().block_in(1024 * 3); |
| assert!(conn.poll_complete().unwrap().is_not_ready()); |
| conn.io.io_mut().block_in(max * 2); |
| assert!(conn.poll_complete().unwrap().is_ready()); |
| |
| assert!(conn.start_send(Frame::Body { chunk: Some(vec![b'c'; 1024 * 8].into()) }).unwrap().is_ready()); |
| Ok(()) |
| }).wait(); |
| } |
| |
| #[test] |
| fn test_conn_body_write_chunked() { |
| let _: Result<(), ()> = future::lazy(|| { |
| let io = AsyncIo::new_buf(vec![], 4096); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.writing = Writing::Body(Encoder::chunked()); |
| |
| assert!(conn.start_send(Frame::Body { chunk: Some("headers".into()) }).unwrap().is_ready()); |
| assert!(conn.start_send(Frame::Body { chunk: Some(vec![b'x'; 8192].into()) }).unwrap().is_ready()); |
| Ok(()) |
| }).wait(); |
| } |
| |
| #[test] |
| fn test_conn_body_flush() { |
| let _: Result<(), ()> = future::lazy(|| { |
| let io = AsyncIo::new_buf(vec![], 1024 * 1024 * 5); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.writing = Writing::Body(Encoder::length(1024 * 1024)); |
| assert!(conn.start_send(Frame::Body { chunk: Some(vec![b'a'; 1024 * 1024].into()) }).unwrap().is_ready()); |
| assert!(!conn.can_buffer_body()); |
| conn.io.io_mut().block_in(1024 * 1024 * 5); |
| assert!(conn.poll_complete().unwrap().is_ready()); |
| assert!(conn.can_buffer_body()); |
| assert!(conn.io.io_mut().flushed()); |
| |
| Ok(()) |
| }).wait(); |
| } |
| |
| #[test] |
| fn test_conn_parking() { |
| use std::sync::Arc; |
| use futures::executor::Notify; |
| use futures::executor::NotifyHandle; |
| |
| struct Car { |
| permit: bool, |
| } |
| impl Notify for Car { |
| fn notify(&self, _id: usize) { |
| assert!(self.permit, "unparked without permit"); |
| } |
| } |
| |
| fn car(permit: bool) -> NotifyHandle { |
| Arc::new(Car { |
| permit: permit, |
| }).into() |
| } |
| |
| // test that once writing is done, unparks |
| let f = future::lazy(|| { |
| let io = AsyncIo::new_buf(vec![], 4096); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.reading = Reading::KeepAlive; |
| assert!(conn.poll().unwrap().is_not_ready()); |
| |
| conn.state.writing = Writing::KeepAlive; |
| assert!(conn.poll_complete().unwrap().is_ready()); |
| Ok::<(), ()>(()) |
| }); |
| ::futures::executor::spawn(f).poll_future_notify(&car(true), 0).unwrap(); |
| |
| |
| // test that flushing when not waiting on read doesn't unpark |
| let f = future::lazy(|| { |
| let io = AsyncIo::new_buf(vec![], 4096); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.writing = Writing::KeepAlive; |
| assert!(conn.poll_complete().unwrap().is_ready()); |
| Ok::<(), ()>(()) |
| }); |
| ::futures::executor::spawn(f).poll_future_notify(&car(false), 0).unwrap(); |
| |
| |
| // test that flushing and writing isn't done doesn't unpark |
| let f = future::lazy(|| { |
| let io = AsyncIo::new_buf(vec![], 4096); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.reading = Reading::KeepAlive; |
| assert!(conn.poll().unwrap().is_not_ready()); |
| conn.state.writing = Writing::Body(Encoder::length(5_000)); |
| assert!(conn.poll_complete().unwrap().is_ready()); |
| Ok::<(), ()>(()) |
| }); |
| ::futures::executor::spawn(f).poll_future_notify(&car(false), 0).unwrap(); |
| } |
| |
| #[test] |
| fn test_conn_closed_write() { |
| let io = AsyncIo::new_buf(vec![], 0); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.close(); |
| |
| match conn.start_send(Frame::Body { chunk: Some(b"foobar".to_vec().into()) }) { |
| Err(_e) => {}, |
| other => panic!("did not return Err: {:?}", other) |
| } |
| |
| assert!(conn.state.is_write_closed()); |
| } |
| |
| #[test] |
| fn test_conn_write_empty_chunk() { |
| let io = AsyncIo::new_buf(vec![], 0); |
| let mut conn = Conn::<_, proto::Bytes, ServerTransaction>::new(io); |
| conn.state.writing = Writing::KeepAlive; |
| |
| assert!(conn.start_send(Frame::Body { chunk: None }).unwrap().is_ready()); |
| assert!(conn.start_send(Frame::Body { chunk: Some(Vec::new().into()) }).unwrap().is_ready()); |
| conn.start_send(Frame::Body { chunk: Some(vec![b'a'].into()) }).unwrap_err(); |
| } |
| */ |
| } |
