From 37dd367db810406320dba1b1bac9c73188cb49f0 Mon Sep 17 00:00:00 2001 From: Sachandhan Ganesh Date: Tue, 19 Jan 2021 11:12:03 -0800 Subject: [PATCH] better handling of stream/sink closing --- examples/tcp-client/Cargo.lock | 912 ++++++++++++++++++++++++++++ examples/tcp-echo-server/Cargo.lock | 912 ++++++++++++++++++++++++++++ examples/tls-echo-server/Cargo.lock | 912 ++++++++++++++++++++++++++++ src/lib.rs | 8 +- src/reader.rs | 22 +- src/writer.rs | 69 ++- 6 files changed, 2799 insertions(+), 36 deletions(-) create mode 100644 examples/tcp-client/Cargo.lock create mode 100644 examples/tcp-echo-server/Cargo.lock create mode 100644 examples/tls-echo-server/Cargo.lock diff --git a/examples/tcp-client/Cargo.lock b/examples/tcp-client/Cargo.lock new file mode 100644 index 0000000..e7cf00e --- /dev/null +++ b/examples/tcp-client/Cargo.lock @@ -0,0 +1,912 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "aho-corasick" 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{ let peer_addr = self.peer_addr(); + let (reader, writer) = self.split(); - drop(self.reader); - // self.writer.close().await; - drop(self.writer); + drop(reader); + + // writer.close().await; + drop(writer); return peer_addr; } diff --git a/src/reader.rs b/src/reader.rs index 8dcb089..0452f6c 100644 --- a/src/reader.rs +++ b/src/reader.rs @@ -15,10 +15,11 @@ use protobuf::well_known_types::Any; const BUFFER_SIZE: usize = 8192; pub struct ConnectionReader { - local_addr: SocketAddr, - peer_addr: SocketAddr, - read_stream: Box, + local_addr: SocketAddr, + peer_addr: SocketAddr, + read_stream: Box, pending_read: Option, + closed: bool, } impl ConnectionReader { @@ -32,6 +33,7 @@ impl ConnectionReader { peer_addr, read_stream, pending_read: None, + closed: false, } } @@ -42,6 +44,10 @@ impl ConnectionReader { pub fn peer_addr(&self) -> SocketAddr { self.peer_addr.clone() } + + pub fn is_closed(&self) -> bool { + self.closed + } } impl Stream for ConnectionReader { @@ -58,6 +64,8 @@ impl Stream for ConnectionReader { Ok(mut bytes_read) => { if bytes_read > 0 { trace!("Read {} bytes from the network stream", bytes_read) + } else if bytes_read == 0 && self.pending_read.is_none() { + return Poll::Pending; } if let Some(mut pending_buf) = self.pending_read.take() { @@ -116,7 +124,13 @@ impl Stream for ConnectionReader { buffer.resize(BUFFER_SIZE, 0); } - Err(_err) => return Poll::Pending, + // Close the stream + Err(_err) => { + trace!("Closing the stream"); + self.pending_read.take(); + self.closed = true; + return Poll::Ready(None); + } } } } diff --git a/src/writer.rs b/src/writer.rs index 5b5b17a..f6442a6 100644 --- a/src/writer.rs +++ b/src/writer.rs @@ -11,10 +11,11 @@ pub use futures::SinkExt; pub use futures::StreamExt; pub struct ConnectionWriter { - local_addr: SocketAddr, - peer_addr: SocketAddr, - write_stream: Box, + local_addr: SocketAddr, + peer_addr: SocketAddr, + write_stream: Box, pending_write: Option, + closed: bool, } impl ConnectionWriter { @@ -28,6 +29,7 @@ impl ConnectionWriter { peer_addr, write_stream, pending_write: None, + closed: false, } } @@ -38,41 +40,18 @@ impl ConnectionWriter { pub fn peer_addr(&self) -> SocketAddr { self.peer_addr.clone() } -} - -impl Sink for ConnectionWriter { - type Error = RecvError; - fn poll_ready(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { - if self.pending_write.is_some() { - trace!("Connection not ready to send message yet, waiting for prior message"); - Poll::Pending - } else { - trace!("Connection ready to send message"); - Poll::Ready(Ok(())) - } + pub fn is_closed(&self) -> bool { + self.closed } - fn start_send(mut self: Pin<&mut Self>, item: T) -> Result<(), Self::Error> { - trace!("Preparing message to be sent next"); - let stitch_msg: ConnectionMessage = ConnectionMessage::from_msg(item); - self.pending_write.replace(stitch_msg); - - Ok(()) - } - - fn poll_flush( - mut self: Pin<&mut Self>, - _cx: &mut Context<'_>, - ) -> Poll> { + fn send_to_conn(&mut self) -> Poll> { if let Some(pending_msg) = self.pending_write.take() { trace!("Send pending message"); if let Ok(buffer) = pending_msg.write_to_bytes() { let msg_size = buffer.len(); trace!("{} bytes to be sent over network connection", msg_size); - trace!("{:?}", buffer.as_slice()); - return if let Ok(_) = futures::executor::block_on(self.write_stream.write_all(buffer.as_slice())) { @@ -97,11 +76,43 @@ impl Sink for ConnectionWriter { Poll::Ready(Ok(())) } +} + +impl Sink for ConnectionWriter { + type Error = RecvError; + + fn poll_ready(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + if self.pending_write.is_some() { + trace!("Connection not ready to send message yet, waiting for prior message"); + Poll::Pending + } else { + trace!("Connection ready to send message"); + Poll::Ready(Ok(())) + } + } + + fn start_send(mut self: Pin<&mut Self>, item: M) -> Result<(), Self::Error> { + trace!("Preparing message to be sent next"); + let stitch_msg: ConnectionMessage = ConnectionMessage::from_msg(item); + self.pending_write.replace(stitch_msg); + + Ok(()) + } + + fn poll_flush( + mut self: Pin<&mut Self>, + _cx: &mut Context<'_>, + ) -> Poll> { + self.send_to_conn() + } fn poll_close( mut self: Pin<&mut Self>, _cx: &mut Context<'_>, ) -> Poll> { + let _ = self.send_to_conn(); + + self.closed = true; if let Ok(_) = futures::executor::block_on(self.write_stream.close()) { Poll::Ready(Ok(())) } else { -- 2.44.0