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[[package]]
|
||||
name = "valuable"
|
||||
version = "0.1.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
|
||||
|
||||
[[package]]
|
||||
name = "wasi"
|
||||
version = "0.11.0+wasi-snapshot-preview1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu",
|
||||
"winapi-x86_64-pc-windows-gnu",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.52.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
|
||||
dependencies = [
|
||||
"windows-targets",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-targets"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
|
||||
dependencies = [
|
||||
"windows_aarch64_gnullvm",
|
||||
"windows_aarch64_msvc",
|
||||
"windows_i686_gnu",
|
||||
"windows_i686_gnullvm",
|
||||
"windows_i686_msvc",
|
||||
"windows_x86_64_gnu",
|
||||
"windows_x86_64_gnullvm",
|
||||
"windows_x86_64_msvc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
|
||||
|
|
@ -0,0 +1,16 @@
|
|||
[package]
|
||||
name = "async_tlv"
|
||||
version = "0.1.0"
|
||||
edition = "2024"
|
||||
|
||||
[dependencies]
|
||||
anyhow = "1.0.96"
|
||||
bytes = "1.10.0"
|
||||
futures-core = "0.3.31"
|
||||
futures-sink = "0.3.31"
|
||||
rmp-serde = "1.3.0"
|
||||
serde = { version = "1.0.218", features = ["derive"] }
|
||||
tokio = { version = "1.43.0", features = ["macros", "net", "rt-multi-thread", "signal", "time"] }
|
||||
tokio-util = { version = "0.7.13", features = ["codec"] }
|
||||
tracing = "0.1.41"
|
||||
tracing-subscriber = "0.3.19"
|
||||
|
|
@ -0,0 +1,78 @@
|
|||
use crate::prelude::*;
|
||||
|
||||
pub(crate) struct App {
|
||||
outbox: VecDeque<ToServer>,
|
||||
stream: Framed<TcpStream, BytesCodec>,
|
||||
timer: Interval,
|
||||
}
|
||||
|
||||
impl App {
|
||||
pub(crate) async fn new() -> Result<Self> {
|
||||
let stream = TcpStream::connect("127.0.0.1:9000").await?;
|
||||
let stream = Framed::new(stream, BytesCodec::new());
|
||||
let mut timer = tokio::time::interval(Duration::from_millis(1000));
|
||||
timer.set_missed_tick_behavior(MissedTickBehavior::Skip);
|
||||
Ok(Self {
|
||||
outbox: Default::default(),
|
||||
stream,
|
||||
timer,
|
||||
})
|
||||
}
|
||||
|
||||
pub(crate) fn poll_run(&mut self, cx: &mut Context<'_>) -> Poll<Result<()>> {
|
||||
{
|
||||
let mut stream = pin!(&mut self.stream);
|
||||
match <_ as futures_sink::Sink<Bytes>>::poll_flush(stream.as_mut(), cx) {
|
||||
Poll::Pending => {}
|
||||
Poll::Ready(Err(err)) => return Poll::Ready(Err(err).context("poll_flush")),
|
||||
Poll::Ready(Ok(())) => {}
|
||||
}
|
||||
}
|
||||
|
||||
if ! self.outbox.is_empty() {
|
||||
let mut stream = pin!(&mut self.stream);
|
||||
match <_ as futures_sink::Sink<Bytes>>::poll_ready(stream.as_mut(), cx) {
|
||||
Poll::Pending => {}
|
||||
Poll::Ready(Err(err)) => {
|
||||
return Poll::Ready(
|
||||
Err(err).context("Can't check network write half for readiness"),
|
||||
);
|
||||
}
|
||||
Poll::Ready(Ok(())) => {
|
||||
cx.waker().wake_by_ref();
|
||||
let frame = rmp_serde::to_vec(&self.outbox.pop_front())?;
|
||||
if let Err(err) = stream.start_send(Bytes::from(frame)) {
|
||||
return Poll::Ready(Err(err).context("start_send"));
|
||||
}
|
||||
tracing::debug!("Started send");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let stream = pin!(&mut self.stream);
|
||||
match stream.poll_next(cx) {
|
||||
Poll::Pending => {}
|
||||
Poll::Ready(None) => return Poll::Ready(Err(anyhow!("Server closed cxn"))),
|
||||
Poll::Ready(Some(frame)) => {
|
||||
cx.waker().wake_by_ref();
|
||||
let frame = frame.context("network framing decode")?;
|
||||
match rmp_serde::from_slice(&frame)? {
|
||||
ToClient::ChatLine { id, line } => {
|
||||
tracing::info!(?id, ?line);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if self.timer.poll_tick(cx).is_ready() {
|
||||
cx.waker().wake_by_ref();
|
||||
if self.outbox.is_empty() {
|
||||
self.outbox.push_back(ToServer::ChatLine {
|
||||
line: "tick".to_string(),
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
Poll::Pending
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,78 @@
|
|||
mod client;
|
||||
mod messages;
|
||||
mod prelude;
|
||||
mod server;
|
||||
|
||||
use prelude::*;
|
||||
|
||||
struct Args {
|
||||
cmd: Subcommand,
|
||||
}
|
||||
|
||||
enum Subcommand {
|
||||
Client,
|
||||
Server,
|
||||
}
|
||||
|
||||
impl Args {
|
||||
fn new() -> Result<Self> {
|
||||
let mut args = std::env::args().skip(1);
|
||||
let cmd = match args.next().as_deref() {
|
||||
None => bail!("Need a subcommand, e.g. `client` or `server`"),
|
||||
Some("client") => Subcommand::Client,
|
||||
Some("server") => Subcommand::Server,
|
||||
Some(_) => bail!("Invalid subcommand"),
|
||||
};
|
||||
Ok(Self { cmd })
|
||||
}
|
||||
}
|
||||
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<()> {
|
||||
let args = Args::new()?;
|
||||
tracing_subscriber::fmt::init();
|
||||
|
||||
match args.cmd {
|
||||
Subcommand::Client => run_client().await,
|
||||
Subcommand::Server => run_server().await,
|
||||
}
|
||||
}
|
||||
|
||||
async fn run_client() -> Result<()> {
|
||||
let mut ctrl_c = signal(SignalKind::interrupt())?;
|
||||
let mut app = client::App::new().await?;
|
||||
loop {
|
||||
let ctl = poll_fn(|cx| {
|
||||
tracing::debug!("Loop");
|
||||
if ctrl_c.poll_recv(cx).is_ready() {
|
||||
tracing::debug!("Caught Ctrl-C");
|
||||
return Poll::Ready(ControlFlow::Break(Ok(())));
|
||||
}
|
||||
|
||||
match app.poll_run(cx) {
|
||||
Poll::Pending => Poll::Pending,
|
||||
Poll::Ready(Ok(())) => Poll::Ready(ControlFlow::Continue(())),
|
||||
Poll::Ready(Err(err)) => Poll::Ready(ControlFlow::Break(Err(err))),
|
||||
}
|
||||
})
|
||||
.await;
|
||||
if let ControlFlow::Break(result) = ctl {
|
||||
return result;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
async fn run_server() -> Result<()> {
|
||||
let mut ctrl_c = signal(SignalKind::interrupt())?;
|
||||
let mut app = server::App::new().await?;
|
||||
poll_fn(|cx| {
|
||||
tracing::debug!("Loop");
|
||||
if ctrl_c.poll_recv(cx).is_ready() {
|
||||
tracing::debug!("Caught Ctrl-C");
|
||||
return Poll::Ready(Ok(()));
|
||||
}
|
||||
|
||||
app.poll_run(cx)
|
||||
})
|
||||
.await
|
||||
}
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
use serde::{Deserialize, Serialize};
|
||||
|
||||
#[derive(Deserialize, Serialize)]
|
||||
pub(crate) enum ToClient {
|
||||
ChatLine { id: u64, line: String },
|
||||
}
|
||||
|
||||
#[derive(Deserialize, Serialize)]
|
||||
pub(crate) enum ToServer {
|
||||
ChatLine { line: String },
|
||||
}
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
pub(crate) use crate::messages::{ToClient, ToServer};
|
||||
pub use anyhow::{Context as _, Result, anyhow, bail};
|
||||
pub use bytes::Bytes;
|
||||
pub use futures_core::stream::Stream;
|
||||
pub use futures_sink::Sink;
|
||||
pub use std::{
|
||||
collections::VecDeque,
|
||||
future::poll_fn,
|
||||
ops::ControlFlow,
|
||||
pin::pin,
|
||||
rc::Rc,
|
||||
task::{Context, Poll},
|
||||
time::Duration,
|
||||
};
|
||||
pub use tokio::{
|
||||
net::{TcpListener, TcpStream},
|
||||
signal::unix::{SignalKind, signal},
|
||||
time::{Interval, MissedTickBehavior},
|
||||
};
|
||||
pub use tokio_util::codec::{BytesCodec, Framed};
|
||||
|
|
@ -0,0 +1,124 @@
|
|||
use crate::prelude::*;
|
||||
|
||||
pub(crate) struct App {
|
||||
clients: Vec<Client>,
|
||||
listener: TcpListener,
|
||||
next_client_id: u64,
|
||||
}
|
||||
|
||||
struct Client {
|
||||
closed: bool,
|
||||
id: u64,
|
||||
outbox: VecDeque<Rc<ToClient>>,
|
||||
stream: Framed<TcpStream, BytesCodec>,
|
||||
}
|
||||
|
||||
impl App {
|
||||
pub(crate) async fn new() -> Result<Self> {
|
||||
let listener = TcpListener::bind("0.0.0.0:9000").await?;
|
||||
|
||||
Ok(Self {
|
||||
clients: Default::default(),
|
||||
listener,
|
||||
next_client_id: 1,
|
||||
})
|
||||
}
|
||||
|
||||
pub(crate) fn poll_run(&mut self, cx: &mut Context<'_>) -> Poll<Result<()>> {
|
||||
let previous_client_count = self.clients.len();
|
||||
|
||||
let mut new_messages = vec![];
|
||||
for client in &mut self.clients {
|
||||
{
|
||||
let mut stream = pin!(&mut client.stream);
|
||||
match <_ as futures_sink::Sink<Bytes>>::poll_flush(stream.as_mut(), cx) {
|
||||
Poll::Pending => {}
|
||||
Poll::Ready(Err(err)) => return Poll::Ready(Err(err).context("poll_flush")),
|
||||
Poll::Ready(Ok(())) => {}
|
||||
}
|
||||
}
|
||||
|
||||
if ! client.outbox.is_empty() {
|
||||
let mut stream = pin!(&mut client.stream);
|
||||
match <_ as futures_sink::Sink<Bytes>>::poll_ready(stream.as_mut(), cx) {
|
||||
Poll::Pending => {}
|
||||
Poll::Ready(Err(err)) => {
|
||||
return Poll::Ready(Err(err).context("Can't check network write half for readiness"));
|
||||
}
|
||||
Poll::Ready(Ok(())) => {
|
||||
cx.waker().wake_by_ref();
|
||||
let Some(msg) = client.outbox.pop_front() else {
|
||||
return Poll::Ready(Err(anyhow!("Can't pop from outbox even though we just checked it was not empty")));
|
||||
};
|
||||
let frame = rmp_serde::to_vec(msg.as_ref())?;
|
||||
if let Err(err) = stream.start_send(Bytes::from(frame)) {
|
||||
return Poll::Ready(Err(err).context("start_send"));
|
||||
}
|
||||
tracing::debug!("Started send");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let stream = pin!(&mut client.stream);
|
||||
match stream.poll_next(cx) {
|
||||
Poll::Pending => {}
|
||||
Poll::Ready(None) => {
|
||||
cx.waker().wake_by_ref();
|
||||
client.closed = true;
|
||||
}
|
||||
Poll::Ready(Some(frame)) => {
|
||||
tracing::info!("Got network data");
|
||||
cx.waker().wake_by_ref();
|
||||
let frame = frame.context("network framing decode")?;
|
||||
let msg: ToServer = rmp_serde::from_slice(&frame)?;
|
||||
match msg {
|
||||
ToServer::ChatLine { line } => {
|
||||
tracing::info!(id = client.id, ?line);
|
||||
new_messages.push(Rc::new(ToClient::ChatLine {
|
||||
id: client.id,
|
||||
line,
|
||||
}));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.clients.retain(|client| {
|
||||
if client.closed {
|
||||
tracing::info!(id = client.id, "Closing client");
|
||||
}
|
||||
!client.closed
|
||||
});
|
||||
|
||||
for client in &mut self.clients {
|
||||
for msg in &new_messages {
|
||||
client.outbox.push_back(Rc::clone(msg));
|
||||
}
|
||||
}
|
||||
|
||||
match self.listener.poll_accept(cx) {
|
||||
Poll::Pending => {}
|
||||
Poll::Ready(Err(err)) => return Poll::Ready(Err(err.into())),
|
||||
Poll::Ready(Ok((stream, _addr))) => {
|
||||
cx.waker().wake_by_ref();
|
||||
let stream = Framed::new(stream, BytesCodec::new());
|
||||
let client = Client {
|
||||
closed: false,
|
||||
id: self.next_client_id,
|
||||
outbox: Default::default(),
|
||||
stream,
|
||||
};
|
||||
self.next_client_id += 1;
|
||||
tracing::info!(id = client.id, "Accepted client");
|
||||
self.clients.push(client);
|
||||
}
|
||||
}
|
||||
|
||||
if self.clients.len() != previous_client_count {
|
||||
tracing::info!(client_count = self.clients.len());
|
||||
}
|
||||
|
||||
Poll::Pending
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue