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|
||||
"itoa",
|
||||
"ryu",
|
||||
"serde",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "signal-hook-registry"
|
||||
version = "1.4.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d8229b473baa5980ac72ef434c4415e70c4b5e71b423043adb4ba059f89c99a1"
|
||||
dependencies = [
|
||||
"libc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "slab"
|
||||
version = "0.4.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8f92a496fb766b417c996b9c5e57daf2f7ad3b0bebe1ccfca4856390e3d3bb67"
|
||||
dependencies = [
|
||||
"autocfg",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "smallvec"
|
||||
version = "1.11.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "62bb4feee49fdd9f707ef802e22365a35de4b7b299de4763d44bfea899442ff9"
|
||||
|
||||
[[package]]
|
||||
name = "socket2"
|
||||
version = "0.5.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2538b18701741680e0322a2302176d3253a35388e2e62f172f64f4f16605f877"
|
||||
dependencies = [
|
||||
"libc",
|
||||
"windows-sys",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "2.0.29"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c324c494eba9d92503e6f1ef2e6df781e78f6a7705a0202d9801b198807d518a"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"unicode-ident",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "thiserror"
|
||||
version = "1.0.47"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "97a802ec30afc17eee47b2855fc72e0c4cd62be9b4efe6591edde0ec5bd68d8f"
|
||||
dependencies = [
|
||||
"thiserror-impl",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "thiserror-impl"
|
||||
version = "1.0.47"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "6bb623b56e39ab7dcd4b1b98bb6c8f8d907ed255b18de254088016b27a8ee19b"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "time"
|
||||
version = "0.3.28"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "17f6bb557fd245c28e6411aa56b6403c689ad95061f50e4be16c274e70a17e48"
|
||||
dependencies = [
|
||||
"deranged",
|
||||
"serde",
|
||||
"time-core",
|
||||
"time-macros",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "time-core"
|
||||
version = "0.1.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "7300fbefb4dadc1af235a9cef3737cea692a9d97e1b9cbcd4ebdae6f8868e6fb"
|
||||
|
||||
[[package]]
|
||||
name = "time-macros"
|
||||
version = "0.2.14"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1a942f44339478ef67935ab2bbaec2fb0322496cf3cbe84b261e06ac3814c572"
|
||||
dependencies = [
|
||||
"time-core",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tokio"
|
||||
version = "1.32.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "17ed6077ed6cd6c74735e21f37eb16dc3935f96878b1fe961074089cc80893f9"
|
||||
dependencies = [
|
||||
"backtrace",
|
||||
"bytes",
|
||||
"libc",
|
||||
"mio",
|
||||
"num_cpus",
|
||||
"parking_lot",
|
||||
"pin-project-lite",
|
||||
"signal-hook-registry",
|
||||
"socket2",
|
||||
"tokio-macros",
|
||||
"windows-sys",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tokio-macros"
|
||||
version = "2.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "630bdcf245f78637c13ec01ffae6187cca34625e8c63150d424b59e55af2675e"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "unicode-ident"
|
||||
version = "1.0.11"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "301abaae475aa91687eb82514b328ab47a211a533026cb25fc3e519b86adfc3c"
|
||||
|
||||
[[package]]
|
||||
name = "uuid"
|
||||
version = "1.4.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "79daa5ed5740825c40b389c5e50312b9c86df53fccd33f281df655642b43869d"
|
||||
dependencies = [
|
||||
"getrandom",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasi"
|
||||
version = "0.11.0+wasi-snapshot-preview1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
|
||||
dependencies = [
|
||||
"windows-targets",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-targets"
|
||||
version = "0.48.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
|
||||
dependencies = [
|
||||
"windows_aarch64_gnullvm",
|
||||
"windows_aarch64_msvc",
|
||||
"windows_i686_gnu",
|
||||
"windows_i686_msvc",
|
||||
"windows_x86_64_gnu",
|
||||
"windows_x86_64_gnullvm",
|
||||
"windows_x86_64_msvc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_gnullvm"
|
||||
version = "0.48.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.48.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.48.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.48.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.48.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.48.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.48.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
|
||||
17
Cargo.toml
Normal file
17
Cargo.toml
Normal file
@ -0,0 +1,17 @@
|
||||
[package]
|
||||
name = "nats-server"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
[dependencies]
|
||||
futures = "0.3.28"
|
||||
futures-channel = "0.3.28"
|
||||
multipeek = "0.1.2"
|
||||
nix = { version = "0.27.1", features = ["socket", "hostname", "net", "dir"] }
|
||||
pin-project-lite = "0.2.13"
|
||||
serde = { version = "1.0.188", features = ["derive"] }
|
||||
serde_json = "1.0.105"
|
||||
thiserror = "1.0.47"
|
||||
time = { version = "0.3.28", features = ["serde"] }
|
||||
tokio = { version = "1.32.0", features = ["full"] }
|
||||
uuid = { version = "1.4.1", features = ["v4"] }
|
||||
409
src/main.rs
Normal file
409
src/main.rs
Normal file
@ -0,0 +1,409 @@
|
||||
#![allow(dead_code)]
|
||||
|
||||
use std::borrow::Cow;
|
||||
use std::collections::HashMap;
|
||||
use std::sync::Arc;
|
||||
|
||||
use time::OffsetDateTime;
|
||||
use tokio::{
|
||||
io::{AsyncReadExt, AsyncWriteExt},
|
||||
net::{
|
||||
tcp::{OwnedReadHalf, OwnedWriteHalf},
|
||||
TcpStream,
|
||||
},
|
||||
spawn,
|
||||
sync::{Mutex, RwLock},
|
||||
};
|
||||
use uuid::Uuid;
|
||||
use multipeek::multipeek;
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct Sub(String);
|
||||
|
||||
impl Sub {
|
||||
pub fn new<S: Into<String>>(s: S) -> Self {Self(s.into())}
|
||||
|
||||
pub fn is_wildcard(&self) -> bool {
|
||||
self.0.contains('*')
|
||||
}
|
||||
|
||||
fn eq_with_wild(&self, chan: &str) -> bool {
|
||||
let mut left = self.0.chars().peekable();
|
||||
let mut right = multipeek(chan.chars());
|
||||
|
||||
while let Some(c) = left.peek() {
|
||||
if *c == '*' {
|
||||
while let Some('*') = left.peek() {
|
||||
eprintln!("while let * l => {:?}", left.next());
|
||||
eprintln!("while let * r => {:?}", right.next()); // consume right to match number of wildcard
|
||||
}
|
||||
// check non-wildcard
|
||||
let pair = (left.peek(), right.peek());
|
||||
eprintln!("after wild {pair:?}");
|
||||
let current = match pair {
|
||||
(Some(c), _) => *c,
|
||||
(None, _) => return true,
|
||||
};
|
||||
|
||||
while let Some(c) = right.peek_nth(0).cloned() {
|
||||
eprintln!("skipping to {current} -> {c}");
|
||||
let second = right.peek_nth(1).cloned();
|
||||
if c == current && second != Some(current) {
|
||||
break;
|
||||
} else {
|
||||
right.next();
|
||||
}
|
||||
}
|
||||
let pair = (left.next(), right.next());
|
||||
eprintln!("after wild {pair:?}");
|
||||
match pair {
|
||||
(None, _) => return true,
|
||||
(Some(l), Some(r)) if l != r => return false,
|
||||
(Some(_), None) => return false,
|
||||
_ => {}
|
||||
};
|
||||
} else {
|
||||
let pair = (left.next(), right.next());
|
||||
eprintln!("non wild {pair:?}");
|
||||
match pair {
|
||||
(None, None) => return true,
|
||||
(Some(l), Some(r)) if l != r => return false,
|
||||
_ => {}
|
||||
};
|
||||
}
|
||||
}
|
||||
left.next() == right.next()
|
||||
}
|
||||
|
||||
pub fn eq_with_chan(&self, chan: &str) -> bool {
|
||||
if self.is_wildcard() {
|
||||
println!("is wild");
|
||||
self.eq_with_wild(chan)
|
||||
} else {
|
||||
println!("not wild {} {}", self.0.len(), chan.len());
|
||||
if self.0.len() != chan.len() {
|
||||
return false;
|
||||
}
|
||||
self.0.eq_ignore_ascii_case(&chan)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod sub_tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn check_simple() {
|
||||
println!("================================================");
|
||||
println!("check simple");
|
||||
assert_eq!(Sub::new("foo").eq_with_chan("foo"), true);
|
||||
assert_eq!(Sub::new("foo").eq_with_chan("fo"), false);
|
||||
assert_eq!(Sub::new("foo").eq_with_chan("oo"), false);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn check_ends_wild() {
|
||||
println!("================================================");
|
||||
println!("check ends");
|
||||
assert_eq!(Sub::new("fo*").eq_with_chan("foo"), true);
|
||||
assert_eq!(Sub::new("f*").eq_with_chan("foo"), true);
|
||||
assert_eq!(Sub::new("f*").eq_with_chan("foz"), true);
|
||||
assert_eq!(Sub::new("f*").eq_with_chan("ff"), true);
|
||||
assert_eq!(Sub::new("f*").eq_with_chan("of"), false);
|
||||
assert_eq!(Sub::new("f*").eq_with_chan("ofz"), false);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn check_starts_wild() {
|
||||
println!("================================================");
|
||||
println!("check starts");
|
||||
assert_eq!(Sub::new("*oo").eq_with_chan("foo"), true);
|
||||
assert_eq!(Sub::new("*ofo").eq_with_chan("acfofo"), true);
|
||||
assert_eq!(Sub::new("*o").eq_with_chan("foo"), true);
|
||||
assert_eq!(Sub::new("*o").eq_with_chan("bar"), false);
|
||||
assert_eq!(Sub::new("*o").eq_with_chan("foz"), false);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn check_middle_wild() {
|
||||
println!("================================================");
|
||||
println!("check middle");
|
||||
assert_eq!(Sub::new("a*z").eq_with_chan("ahz"), true);
|
||||
assert_eq!(Sub::new("a*z").eq_with_chan("ahkz"), true);
|
||||
assert_eq!(Sub::new("a*z").eq_with_chan("hakz"), false);
|
||||
assert_eq!(Sub::new("a*z").eq_with_chan("akza"), false);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn check_multiple_wild() {
|
||||
println!("================================================");
|
||||
println!("check multi");
|
||||
assert_eq!(Sub::new("*a*z").eq_with_chan("gahz"), true);
|
||||
assert_eq!(Sub::new("*a*z").eq_with_chan("ahz"), false);
|
||||
|
||||
assert_eq!(Sub::new("a*k*z").eq_with_chan("asklz"), true);
|
||||
assert_eq!(Sub::new("a*k*z").eq_with_chan("sklz"), false);
|
||||
assert_eq!(Sub::new("a*k*z").eq_with_chan("saklz"), false);
|
||||
assert_eq!(Sub::new("a*k*z").eq_with_chan("asklzl"), false);
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone)]
|
||||
struct Server {
|
||||
clients: Arc<RwLock<HashMap<Uuid, Client>>>,
|
||||
subcriptions: Arc<RwLock<Vec<(Sub, Uuid)>>>,
|
||||
}
|
||||
|
||||
impl Server {
|
||||
pub async fn register(&mut self, client: Client) {
|
||||
self.clients.write().await.insert(client.id, client);
|
||||
}
|
||||
|
||||
pub async fn remove(&mut self, client: Client) {
|
||||
*client.dead.write().await = true;
|
||||
self.clients.write().await.remove(&client.id);
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone)]
|
||||
struct Client {
|
||||
id: uuid::Uuid,
|
||||
writer: Arc<Mutex<OwnedWriteHalf>>,
|
||||
dead: Arc<RwLock<bool>>,
|
||||
}
|
||||
|
||||
impl Client {
|
||||
pub fn new(write: OwnedWriteHalf) -> Self {
|
||||
Self {
|
||||
id: uuid::Uuid::new_v4(),
|
||||
writer: Arc::new(Mutex::new(write)),
|
||||
dead: Arc::new(RwLock::new(false)),
|
||||
}
|
||||
}
|
||||
|
||||
pub async fn write(&self, s: Cow<'static, str>) -> Result<(), CmdErr> {
|
||||
let mut l = self.writer.lock().await;
|
||||
l.write(format!("{s}\r\n").as_bytes())
|
||||
.await
|
||||
.map_err(|e| {
|
||||
eprintln!("{e}");
|
||||
CmdErr::WriteFailed
|
||||
})
|
||||
.map(|_| ())
|
||||
}
|
||||
}
|
||||
|
||||
#[tokio::main]
|
||||
async fn main() -> std::io::Result<()> {
|
||||
let listener = tokio::net::TcpListener::bind(("0.0.0.0", 4222))
|
||||
.await
|
||||
.unwrap();
|
||||
listener.set_ttl(100).expect("Failed to set TTL");
|
||||
|
||||
while let Ok((stream, _addr)) = listener.accept().await {
|
||||
spawn(async move {
|
||||
handle_connection(stream).await;
|
||||
});
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
#[derive(Clone)]
|
||||
struct Context {
|
||||
last_live_msg: Arc<RwLock<time::OffsetDateTime>>,
|
||||
}
|
||||
|
||||
async fn handle_connection(stream: TcpStream) {
|
||||
let ctx = Context {
|
||||
last_live_msg: Arc::new(RwLock::new(time::OffsetDateTime::now_utc())),
|
||||
};
|
||||
|
||||
let is_alive = spawn(start_stream_health_check(ctx.clone()));
|
||||
let handle_commands = spawn(handle_commands(stream, ctx));
|
||||
|
||||
tokio::select!(
|
||||
_ = is_alive => (),
|
||||
_ = handle_commands => (),
|
||||
);
|
||||
}
|
||||
|
||||
async fn handle_commands(stream: TcpStream, ctx: Context) {
|
||||
let (mut rx, mut tx) = stream.into_split();
|
||||
let mut buf = Vec::with_capacity(4096);
|
||||
|
||||
while let Ok(_) = handle_incomming_cmd(&mut rx, &mut tx, &mut buf, ctx.clone()).await {}
|
||||
}
|
||||
|
||||
async fn handle_incomming_cmd(
|
||||
rx: &mut OwnedReadHalf,
|
||||
tx: &mut OwnedWriteHalf,
|
||||
buf: &mut Vec<u8>,
|
||||
ctx: Context,
|
||||
) -> Result<(), CmdErr> {
|
||||
let Ok(_n) = rx.read_buf(buf).await else {
|
||||
return Ok(());
|
||||
};
|
||||
let pos = match buf.iter().position(|i| *i == b'\r') {
|
||||
Some(0) | None => return Ok(()),
|
||||
Some(n) => n,
|
||||
};
|
||||
let Ok(msg) = std::str::from_utf8(&buf[..pos]) else {
|
||||
return Ok(());
|
||||
};
|
||||
eprintln!("buffer msg is: {msg:?}");
|
||||
for msg in msg.to_owned().split('\r') {
|
||||
eprintln!("Message is: {:?}", msg);
|
||||
match handle_msg(msg, buf, rx, tx).await {
|
||||
Err(e) => {
|
||||
tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;
|
||||
return Err(e);
|
||||
}
|
||||
Ok(Op::NoOp) => {}
|
||||
};
|
||||
}
|
||||
*ctx.last_live_msg.write().await = time::OffsetDateTime::now_utc();
|
||||
buf.clear();
|
||||
Ok(())
|
||||
}
|
||||
|
||||
async fn start_stream_health_check(ctx: Context) {
|
||||
loop {
|
||||
if *ctx.last_live_msg.read().await + PING_PONG_SPAN >= OffsetDateTime::now_utc() {
|
||||
tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;
|
||||
continue;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
async fn handle_msg<'stream>(
|
||||
msg: &str,
|
||||
buf: &mut Vec<u8>,
|
||||
rx: &mut OwnedReadHalf,
|
||||
tx: &mut OwnedWriteHalf,
|
||||
) -> Result<Op, CmdErr> {
|
||||
let cmd: Cmd = match Cmd::parse_command(msg, buf, rx).await {
|
||||
Ok(cmd) => cmd,
|
||||
Err(e) => {
|
||||
let msg = format!("-ERR '{e}'\r\n");
|
||||
tx.write(msg.as_bytes()).await.unwrap();
|
||||
return Err(e);
|
||||
}
|
||||
};
|
||||
match cmd {
|
||||
Cmd::Connect(_) => {
|
||||
tx.write(b"+OK\r\n").await.unwrap();
|
||||
Ok(Op::NoOp)
|
||||
}
|
||||
Cmd::Publish {
|
||||
channel_name,
|
||||
payload,
|
||||
len,
|
||||
} => {
|
||||
tx.write(b"+OK\r\n").await.unwrap();
|
||||
tx.write(format!("received {channel_name:?} {len:?} {payload:?} \r\n").as_bytes())
|
||||
.await
|
||||
.unwrap();
|
||||
Ok(Op::NoOp)
|
||||
}
|
||||
Cmd::Ping | Cmd::Pong => {
|
||||
//
|
||||
Ok(Op::NoOp)
|
||||
}
|
||||
_ => Ok(Op::NoOp),
|
||||
}
|
||||
}
|
||||
|
||||
enum Op {
|
||||
NoOp,
|
||||
}
|
||||
|
||||
const PING_PONG_SPAN: time::Duration = time::Duration::seconds(1);
|
||||
|
||||
#[derive(Debug)]
|
||||
struct ChannelName(String);
|
||||
|
||||
#[derive(Debug)]
|
||||
struct UniqueId(String);
|
||||
|
||||
#[derive(Debug)]
|
||||
struct ConnectArgs {}
|
||||
|
||||
enum Cmd {
|
||||
Connect(ConnectArgs),
|
||||
Ping,
|
||||
Pong,
|
||||
Subscribe {
|
||||
channel_name: ChannelName,
|
||||
uid: UniqueId,
|
||||
},
|
||||
UnSubscribe {
|
||||
uid: UniqueId,
|
||||
},
|
||||
Publish {
|
||||
channel_name: ChannelName,
|
||||
payload: String,
|
||||
len: usize,
|
||||
},
|
||||
Message {
|
||||
channel_name: ChannelName,
|
||||
target_uid: UniqueId,
|
||||
payload: String,
|
||||
len: usize,
|
||||
},
|
||||
}
|
||||
|
||||
impl Cmd {
|
||||
async fn parse_command(
|
||||
s: &str,
|
||||
buf: &mut Vec<u8>,
|
||||
rx: &mut OwnedReadHalf,
|
||||
) -> Result<Self, CmdErr> {
|
||||
let mut parts = s.split_whitespace();
|
||||
let cmd = parts.next().ok_or(CmdErr::UnknownCmd)?;
|
||||
if cmd.eq_ignore_ascii_case("connect") {
|
||||
let args = ConnectArgs {};
|
||||
// TODO: args???
|
||||
Ok(Cmd::Connect(args))
|
||||
} else if cmd.eq_ignore_ascii_case("ping") {
|
||||
Ok(Cmd::Ping)
|
||||
} else if cmd.eq_ignore_ascii_case("pong") {
|
||||
Ok(Cmd::Pong)
|
||||
} else if cmd.eq_ignore_ascii_case("pub") {
|
||||
let channel_name = ChannelName(parts.next().ok_or(CmdErr::MissingChanName)?.to_owned());
|
||||
let len: usize = parts
|
||||
.next()
|
||||
.ok_or(CmdErr::ExpectLen)?
|
||||
.parse()
|
||||
.map_err(|_| CmdErr::ExpectLen)?;
|
||||
let Ok(_) = rx.read_exact(&mut buf[..len]).await else {
|
||||
return Err(CmdErr::MissingArg);
|
||||
};
|
||||
let Ok(payload) = std::str::from_utf8(&buf[..len]) else {
|
||||
return Err(CmdErr::MissingArg);
|
||||
};
|
||||
Ok(Cmd::Publish {
|
||||
channel_name,
|
||||
payload: payload.to_owned(),
|
||||
len,
|
||||
})
|
||||
} else {
|
||||
Err(CmdErr::UnknownCmd)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, thiserror::Error)]
|
||||
enum CmdErr {
|
||||
#[error("Unknown Protocol Operation")]
|
||||
UnknownCmd,
|
||||
#[error("Missing argument")]
|
||||
MissingArg,
|
||||
#[error("Missing channel name")]
|
||||
MissingChanName,
|
||||
#[error("Missing payload length")]
|
||||
ExpectLen,
|
||||
#[error("Unable to write to client")]
|
||||
WriteFailed,
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user