corpsmoderne/lj_sketch
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refactoring

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This commit is contained in:
Marc Planard 2024-02-29 15:54:45 +01:00
parent 837338cb69
commit 059118c535
6 changed files with 93 additions and 73 deletions
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1
Cargo.toml
View File

@ -6,6 +6,7 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0.75"
axum = { version = "0.6.20", features = ["ws", "headers"] }
futures = "0.3.28"
geo = "0.26.0"

2
pub/index.html
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@ -14,6 +14,8 @@
class="button2x" value="#ffffff"></input>
<input type="button" id="clearButton"
class="button2x" value="♻"></input>
<!-- <input type="button" id="errButton"
class="button2x" value="err"></input> !-->
</div>
<div>

17
pub/main.js
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@ -55,7 +55,7 @@ const updateCanvas = (canvas, ctx, lines) => {
}
};
const initDrawing = (canvas, clearButton, selectedColor, ws) => {
const initDrawing = (canvas, clearButton, errButton, selectedColor, ws) => {
const ctx = canvas.getContext("2d");
ctx.lineWidth = 2;
let lines = [];
@ -68,11 +68,15 @@ const initDrawing = (canvas, clearButton, selectedColor, ws) => {
resetCanvas();
clearButton.onclick = evt => {
lines = [];
resetCanvas();
ws.send(JSON.stringify({ t: "clear" }));
};
if (errButton) {
errButton.onclick = evt => {
ws.send(JSON.stringify({ t: "error", msg: "this is an error" }));
};
}
canvas.addEventListener("mousedown", evt => {
const pt = getMousePoint(canvas, evt, selectedColor.value);
currentLine = [ pt ];
@ -89,7 +93,7 @@ const initDrawing = (canvas, clearButton, selectedColor, ws) => {
});
canvas.addEventListener("mouseup", evt => {
console.log(currentLine);
// console.log(currentLine);
currentLine = null;
ws.send(JSON.stringify({ t: "stroke"}));
});
@ -109,7 +113,7 @@ const initDrawing = (canvas, clearButton, selectedColor, ws) => {
};
const initWs = errorBox => {
const socket = new WebSocket('ws://localhost:3000/ws');
const socket = new WebSocket('ws://'+ location.host + '/ws');
socket.addEventListener('open', function (event) {
console.log("Open", event);
@ -131,9 +135,10 @@ window.onload = () => {
const colorsDiv = document.querySelector("#colors");
const selectedColor = document.querySelector("#selectedColor");
const clearButton = document.querySelector("#clearButton");
const errButton = document.querySelector("#errButton");
const errorBox = document.querySelector("#errorBox");
const canvas = document.querySelector("#canvas");
initUI(colorsDiv, selectedColor);
let ws = initWs(errorBox);
initDrawing(canvas, clearButton, selectedColor, ws);
initDrawing(canvas, clearButton, errButton, selectedColor, ws);
};

13
src/gen_server.rs
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@ -25,7 +25,10 @@ async fn gen_server(mut rx: Receiver<GSMsg>) {
match msg {
GSMsg::NewClient((addr, c_tx)) => {
for line in &lines {
c_tx.send(GSMsg::NewLine(line.clone())).await.unwrap();
let ret = c_tx.send(GSMsg::NewLine(line.clone())).await;
if let Err(err) = ret {
tracing::warn!("Client {addr} send error: {err}");
}
}
clients.insert(addr, c_tx);
tracing::info!("NewClient {addr}");
@ -53,11 +56,9 @@ async fn send_all(
let mut to_remove : Vec<SocketAddr> = vec![];
for (addr, ref mut tx) in clients.iter() {
let ret = tx
.send(msg.clone())
.await;
if ret.is_err() {
tracing::warn!("Client {addr} abruptly disconnected");
let ret = tx.send(msg.clone()).await;
if let Err(err) = ret {
tracing::warn!("Client {addr} abruptly disconnected: {err}");
to_remove.push(*addr);
}
}

12
src/main.rs
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@ -25,9 +25,10 @@ use gen_server::GSMsg;
const LISTEN_ON : &str = "0.0.0.0:3000";
#[tokio::main]
async fn main() {
async fn main() -> anyhow::Result<()> {
tracing_subscriber::registry()
.with(tracing_subscriber::EnvFilter::try_from_default_env()
//.with(tracing_subscriber::EnvFilter::try_from_default_env()
.with(tracing_subscriber::EnvFilter::try_from_env("LJ_SKETCH")
.unwrap_or_else(|_| "lj_sketch=info,tower_http=info".into()))
.with(tracing_subscriber::fmt::layer())
.init();
@ -45,13 +46,12 @@ async fn main() {
.make_span_with(DefaultMakeSpan::default()
.include_headers(false)));
let addr : SocketAddr = LISTEN_ON.parse().unwrap();
let addr : SocketAddr = LISTEN_ON.parse()?;
tracing::info!("listening on {}", addr);
axum::Server::bind(&addr)
.serve(app.into_make_service_with_connect_info::<SocketAddr>())
.await
.unwrap();
.await?;
Ok(())
}
async fn ws_handler(

105
src/ws_client.rs
View File

@ -1,8 +1,10 @@
use axum::extract::ws::{Message, Message::Text, Message::Close, WebSocket};
use axum::extract::ws::{Message, WebSocket};
use std::net::SocketAddr;
use tokio::sync::mpsc::{self, Sender};
use serde::{Serialize, Deserialize};
use core::ops::ControlFlow;
use anyhow::{Result,anyhow};
use crate::gen_server::GSMsg;
use crate::line::{Line, simplify_line};
@ -22,12 +24,23 @@ enum JMsg {
}
pub async fn handle_socket(
mut socket: WebSocket,
socket: WebSocket,
who: SocketAddr,
gs_tx: Sender<GSMsg>
) {
match handle_socket_(socket, who, gs_tx).await {
Ok(()) => {},
Err(err) => tracing::warn!("{who}: WS Handler error: {err}")
}
}
pub async fn handle_socket_(
mut socket: WebSocket,
who: SocketAddr,
gs_tx: Sender<GSMsg>
) -> Result<()> {
let (chan_tx, mut chan_rx) = mpsc::channel(32);
gs_tx.send(GSMsg::NewClient((who, chan_tx))).await.unwrap();
gs_tx.send(GSMsg::NewClient((who, chan_tx))).await?;
let mut line : Line = vec![];
loop {
@ -37,18 +50,15 @@ pub async fn handle_socket(
tracing::warn!("{who}: Error receiving packet: {msg:?}");
continue;
};
match process_ws_msg(&gs_tx, &who, &mut line, msg).await {
ControlFlow::Break(()) => break,
match process_ws_msg(&gs_tx, &who, &mut line, msg).await? {
ControlFlow::Break(()) => break Ok(()),
ControlFlow::Continue(()) => {}
}
},
Some(msg) = chan_rx.recv() => {
process_gs_msg(&mut socket, &who, msg).await
process_gs_msg(&mut socket, &who, msg).await?
},
else => {
tracing::warn!("{who}: Connection lost unexpectedly.");
break;
}
else => break Err(anyhow!("{who}: Connection lost unexpectedly."))
}
}
}
@ -57,19 +67,20 @@ async fn process_gs_msg(
socket: &mut WebSocket,
who: &SocketAddr,
msg: GSMsg
) {
) -> Result<()> {
match msg {
GSMsg::NewLine(line) => {
socket.send(Message::Text(line_to_json(&line))).await.unwrap();
socket.send(Message::Text(line_to_json(&line)?)).await?;
},
GSMsg::Clear => {
let msg = serde_json::to_string(&JMsg::Clear).unwrap();
socket.send(Message::Text(msg)).await.unwrap();
let msg = serde_json::to_string(&JMsg::Clear)?;
socket.send(Message::Text(msg)).await?;
},
msg => {
tracing::info!("{who} should not get this: {:?}", msg);
}
}
Ok(())
}
async fn process_ws_msg(
@ -77,75 +88,75 @@ async fn process_ws_msg(
who: &SocketAddr,
line: &mut Line,
msg: Message
) -> ControlFlow<(),()> {
) -> Result<ControlFlow<(),()>> {
match msg {
Text(text) => match serde_json::from_str(&text) {
Message::Text(text) => {
tracing::debug!("{who}: sent: {text}");
match serde_json::from_str(&text) {
Ok(json) => {
tracing::debug!("{who}: '{json:?}'");
tracing::debug!("{who}: got json: {json:?}");
match handle_ws_msg(line, json) {
Ok(Some(req)) => gs_tx.send(req).await.unwrap(),
Ok(Some(req)) => gs_tx.send(req).await?,
Ok(None) => {},
Err(err) => {
tracing::warn!("{who}: message error: {err}");
}
}
},
Err(err) => {
tracing::warn!("{who}: can't parse JSON: {err}");
Err(err) => tracing::warn!("{who}: can't parse JSON: {err} in: {text}")
}
},
Close(close) => {
Message::Close(close) => {
tracing::info!("{who}: closing: {close:?}");
gs_tx.send(GSMsg::DeleteClient(*who)).await.unwrap();
return ControlFlow::Break(());
gs_tx.send(GSMsg::DeleteClient(*who)).await?;
return Ok(ControlFlow::Break(()));
},
_ => {
tracing::warn!("{who}: can't handle message: {msg:?}");
}
};
ControlFlow::Continue(())
Ok(ControlFlow::Continue(()))
}
fn handle_ws_msg(
line: &mut Line,
msg: JMsg
) -> Result<Option<GSMsg>, &'static str> {
) -> Result<Option<GSMsg>> {
match msg {
JMsg::Clear => {
line.clear();
return Ok(Some(GSMsg::Clear));
},
JMsg::Clear => Ok(Some(GSMsg::Clear)),
JMsg::MoveTo { x, y, color } => {
*line = vec![ (x, y, parse_color(color)?) ];
line.clear();
line.push((x, y, parse_color(color)?));
Ok(None)
},
JMsg::LineTo { x, y, color } => {
line.push( (x, y, parse_color(color)?) );
},
JMsg::Stroke => {
if line.len() > 1 {
let simple_line = simplify_line(line);
*line = vec![];
return Ok(Some(GSMsg::NewLine(simple_line)));
}
},
JMsg::Line{..} => {
return Err("recieved a line message O_o");
}
};
Ok(None)
},
JMsg::Stroke if line.len() > 1 => {
let simple_line = simplify_line(line);
line.clear();
Ok(Some(GSMsg::NewLine(simple_line)))
},
JMsg::Stroke => Err(anyhow!("can't stroke a 1 point 'line'")),
JMsg::Line{..} => Err(anyhow!("recieved a line message O_o"))
}
}
fn line_to_json(line: &Line) -> String {
fn line_to_json(line: &Line) -> Result<String> {
let line = line.iter()
.map(| (x, y, c) | (*x, *y, format!("#{:06x}", c)))
.collect();
serde_json::to_string(&JMsg::Line{ line }).unwrap()
let json = serde_json::to_string(&JMsg::Line{ line })?;
Ok(json)
}
fn parse_color(s: String) -> Result<u32, &'static str> {
fn parse_color(s: String) -> Result<u32> {
if s.len() != 7 || &s[0..1] != "#" {
Err("badly formated color.")
Err(anyhow!("badly formated color"))
} else {
u32::from_str_radix(&s[1..], 16).map_err(|_| "unable to parse color")
u32::from_str_radix(&s[1..], 16)
.map_err(|_| anyhow!("unable to parse color"))
}
}