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[Feat] ws server for send message to client when received message which

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# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
# dependencies
/node_modules
/.pnp
.pnp.js
# testing
/coverage
# production
/build
# misc
.DS_Store
.env.local
.env.development.local
.env.test.local
.env.production.local
npm-debug.log*
yarn-debug.log*
yarn-error.log*

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# Getting Started with Create React App
This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
## Available Scripts
In the project directory, you can run:
### `npm start`
Runs the app in the development mode.\
Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
The page will reload if you make edits.\
You will also see any lint errors in the console.
### `npm test`
Launches the test runner in the interactive watch mode.\
See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
### `npm run build`
Builds the app for production to the `build` folder.\
It correctly bundles React in production mode and optimizes the build for the best performance.
The build is minified and the filenames include the hashes.\
Your app is ready to be deployed!
See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
### `npm run eject`
**Note: this is a one-way operation. Once you `eject`, you can’t go back!**
If you aren’t satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.
You don’t have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.
## Learn More
You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
To learn React, check out the [React documentation](https://reactjs.org/).

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{
"name": "my-app",
"version": "0.1.0",
"private": true,
"dependencies": {
"@testing-library/jest-dom": "^5.17.0",
"@testing-library/react": "^13.4.0",
"@testing-library/user-event": "^13.5.0",
"@types/jest": "^27.5.2",
"@types/node": "^16.18.81",
"@types/react": "^18.2.55",
"@types/react-dom": "^18.2.19",
"react": "^18.2.0",
"react-dom": "^18.2.0",
"react-scripts": "5.0.1",
"typescript": "^4.9.5",
"web-vitals": "^2.1.4",
"react-use-websocket": "^3.0.0"
},
"scripts": {
"start": "react-scripts start",
"build": "npm run tailwindcss:compile && react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject",
"tailwindcss:watch": "npm run tailwindcss:compile -- -w",
"tailwindcss:compile": "tailwindcss -i ./src/input.css -o ./src/output.css"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"tailwindcss": "^3.4.1"
}
}

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="theme-color" content="#000000" />
<meta
name="description"
content="Web site created using create-react-app"
/>
<link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
<!--
manifest.json provides metadata used when your web app is installed on a
user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
-->
<link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
<!--
Notice the use of %PUBLIC_URL% in the tags above.
It will be replaced with the URL of the `public` folder during the build.
Only files inside the `public` folder can be referenced from the HTML.
Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
work correctly both with client-side routing and a non-root public URL.
Learn how to configure a non-root public URL by running `npm run build`.
-->
<title>React App</title>
</head>
<body>
<noscript>You need to enable JavaScript to run this app.</noscript>
<div id="root"></div>
<!--
This HTML file is a template.
If you open it directly in the browser, you will see an empty page.
You can add webfonts, meta tags, or analytics to this file.
The build step will place the bundled scripts into the <body> tag.
To begin the development, run `npm start` or `yarn start`.
To create a production bundle, use `npm run build` or `yarn build`.
-->
</body>
</html>

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{
"short_name": "React App",
"name": "Create React App Sample",
"icons": [
{
"src": "favicon.ico",
"sizes": "64x64 32x32 24x24 16x16",
"type": "image/x-icon"
},
{
"src": "logo192.png",
"type": "image/png",
"sizes": "192x192"
},
{
"src": "logo512.png",
"type": "image/png",
"sizes": "512x512"
}
],
"start_url": ".",
"display": "standalone",
"theme_color": "#000000",
"background_color": "#ffffff"
}

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# https://www.robotstxt.org/robotstxt.html
User-agent: *
Disallow:

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import React, { useCallback, useEffect, useState } from "react";
import useWebSocket, { ReadyState } from "react-use-websocket";
function App() {
const [socketUrl, setSocketUrl] = useState("ws://127.0.0.1:8080/ws");
const [messageHistory, setMessageHistory] = useState([]);
const { sendMessage, lastMessage, readyState } = useWebSocket(socketUrl);
const handleClickSendMessage = useCallback(() => {
sendMessage("Hello");
}, []);
console.info(lastMessage);
return (
<div className="App">
<span className="text-3xl font-bold underline">
{lastMessage?.data ?? ""}
</span>
<button onClick={handleClickSendMessage}>Send</button>
</div>
);
}
export default App;

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export const ControlBar = {};

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export * from "./control-bar";

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import React from "react";
import ReactDOM from "react-dom/client";
import "./output.css";
import App from "./app";
import reportWebVitals from "./reportWebVitals";
const root = ReactDOM.createRoot(
document.getElementById("root") as HTMLElement,
);
root.render(
<React.StrictMode>
<App />
</React.StrictMode>,
);
// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();

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@tailwind base;
@tailwind components;
@tailwind utilities;

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/// <reference types="react-scripts" />

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import { ReportHandler } from 'web-vitals';
const reportWebVitals = (onPerfEntry?: ReportHandler) => {
if (onPerfEntry && onPerfEntry instanceof Function) {
import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
getCLS(onPerfEntry);
getFID(onPerfEntry);
getFCP(onPerfEntry);
getLCP(onPerfEntry);
getTTFB(onPerfEntry);
});
}
};
export default reportWebVitals;

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// jest-dom adds custom jest matchers for asserting on DOM nodes.
// allows you to do things like:
// expect(element).toHaveTextContent(/react/i)
// learn more: https://github.com/testing-library/jest-dom
import '@testing-library/jest-dom';

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import type { Config } from "tailwindcss";
export default {
content: ["./src/**/*.{js,jsx,ts,tsx}"],
theme: {
extend: {},
},
plugins: [],
} satisfies Config;

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{
"compilerOptions": {
"target": "es5",
"lib": [
"dom",
"dom.iterable",
"esnext"
],
"allowJs": true,
"skipLibCheck": true,
"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"strict": true,
"forceConsistentCasingInFileNames": true,
"noFallthroughCasesInSwitch": true,
"module": "esnext",
"moduleResolution": "node",
"resolveJsonModule": true,
"isolatedModules": true,
"noEmit": true,
"jsx": "react-jsx"
},
"include": [
"src"
]
}

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[package]
name = "snap-server"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
actix = "0.13.3"
actix-web = "4.5.1"
actix-web-actors = "4.3.0"
neovim-lib = "0.6.1"
rand = "0.8.5"
serde = {version = "1.0.196", features = ["derive", "serde_derive", "std"]}
serde_json = "1.0.113"

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use serde::Serialize;
#[derive(Serialize)]
pub struct Event<T>
where
T: Serialize,
{
name: String,
data: T,
}
impl<T> Event<T>
where
T: Serialize,
{
pub fn new(name: String, data: T) -> Event<T> {
Event { name, data }
}
}
impl<T> Into<String> for Event<T>
where
T: Serialize,
{
fn into(self) -> String {
serde_json::to_string(&self).unwrap()
}
}

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mod messages;
pub mod neovim;
use actix::{Actor, Addr, AsyncContext, Context};
pub use messages::Message;
use neovim::Neovim;
use serde_json::json;
use std::{
collections::HashMap,
sync::{Arc, Mutex},
};
use crate::{
event::Event,
server::{ClientMessage, Server},
};
pub struct EventHandler {
neovim: Arc<Mutex<Neovim>>,
server: Arc<Addr<Server>>,
}
impl Actor for EventHandler {
type Context = Context<Self>;
fn started(&mut self, _: &mut Self::Context) {
self.start_listen();
}
}
impl EventHandler {
pub fn new(neovim: Arc<Mutex<Neovim>>, server: Arc<Addr<Server>>) -> EventHandler {
EventHandler { neovim, server }
}
pub fn start_listen(&mut self) {
let receiver = self.neovim.lock().unwrap().create_receiver();
for (event_name, values) in receiver {
match Message::from(event_name.clone()) {
Message::PreviewCode => self.server.do_send(ClientMessage {
msg: Event::new(
"hello".to_string(),
serde_json::from_str::<String>(
values
.iter()
.map(|value| value.to_string())
.collect::<Vec<String>>()
.first()
.unwrap(),
)
.unwrap(),
)
.into(),
}),
Message::Unknown => self
.neovim
.lock()
.unwrap()
.print(&format!("Unhandled event which name is {}", &event_name)),
};
}
}
}

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#[derive(PartialEq, Hash)]
pub enum Message {
PreviewCode,
Unknown,
}
impl Eq for Message {}
impl From<String> for Message {
fn from(value: String) -> Self {
match value.as_str() {
"preview_code" => Message::PreviewCode,
_ => Message::Unknown,
}
}
}

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use neovim_lib::{NeovimApi, Session, Value};
use std::sync::mpsc;
pub struct Neovim {
pub instance: neovim_lib::Neovim,
}
impl Neovim {
pub fn new() -> Neovim {
let session = Session::new_parent().unwrap();
let instance = neovim_lib::Neovim::new(session);
Neovim { instance }
}
pub fn create_receiver(&mut self) -> mpsc::Receiver<(String, Vec<Value>)> {
return self.instance.session.start_event_loop_channel();
}
pub fn print(&mut self, message: &str) {
self.instance
.command(&format!("lua print(\"{}\")", message))
.unwrap();
}
}

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mod event;
mod event_handler;
mod server;
mod session;
use std::sync::{Arc, Mutex};
use actix::{Actor, Addr, Arbiter, StreamHandler};
use actix_web::{
web::{self, Data, Payload},
App, Error, HttpRequest, HttpResponse, HttpServer,
};
use actix_web_actors::ws;
use event_handler::neovim::Neovim;
use event_handler::{EventHandler, Message};
use server::Server;
use session::Session;
async fn index(
req: HttpRequest,
stream: Payload,
server: Data<Arc<Addr<Server>>>,
) -> Result<HttpResponse, Error> {
ws::start(Session::new(server), &req, stream)
}
#[actix_web::main]
async fn main() -> std::io::Result<()> {
let neovim = Arc::new(Mutex::new(Neovim::new()));
let server = Arc::new(Server::new(neovim.clone()).start());
let cloned_server = Arc::clone(&server);
Arbiter::new().spawn(async {
EventHandler::new(neovim, cloned_server).start();
});
HttpServer::new(move || {
App::new()
.app_data(web::Data::new(server.clone()))
.route("/ws", web::get().to(index))
})
.bind(("127.0.0.1", 8080))?
.run()
.await
}

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use actix::{Actor, Context, Handler, Message, Recipient};
use rand::{rngs::ThreadRng, Rng};
use std::{
collections::HashMap,
sync::{Arc, Mutex},
};
use crate::event_handler::neovim::Neovim;
type SessionID = usize;
#[derive(Message)]
#[rtype(result = "()")]
pub struct ServerMessage(pub String);
#[derive(Message)]
#[rtype(usize)]
pub struct Connect {
pub addr: Recipient<ServerMessage>,
}
#[derive(Message)]
#[rtype(result = "()")]
pub struct Disconnect {
pub id: usize,
}
#[derive(Message)]
#[rtype(result = "()")]
pub struct ClientMessage {
pub msg: String,
}
pub struct Server {
rng: ThreadRng,
sessions: HashMap<SessionID, Recipient<ServerMessage>>,
neovim: Arc<Mutex<Neovim>>,
}
impl Server {
pub fn new(neovim: Arc<Mutex<Neovim>>) -> Server {
Server {
rng: rand::thread_rng(),
sessions: HashMap::new(),
neovim,
}
}
fn send_message_to_clients(&self, message: &str) {
for (_, session) in &self.sessions {
session.do_send(ServerMessage(message.to_string()))
}
}
}
impl Actor for Server {
type Context = Context<Self>;
}
impl Handler<Connect> for Server {
type Result = SessionID;
fn handle(&mut self, msg: Connect, _: &mut Self::Context) -> Self::Result {
let id = self.rng.gen::<SessionID>();
self.sessions.insert(id, msg.addr);
id
}
}
impl Handler<Disconnect> for Server {
type Result = ();
fn handle(&mut self, msg: Disconnect, _: &mut Self::Context) -> Self::Result {
self.sessions.remove(&msg.id);
}
}
impl Handler<ClientMessage> for Server {
type Result = ();
fn handle(&mut self, msg: ClientMessage, _: &mut Self::Context) -> Self::Result {
self.send_message_to_clients(&msg.msg)
}
}

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use crate::server::{ClientMessage, Connect, Disconnect, Server, ServerMessage};
use actix::{
dev::ContextFutureSpawner, fut, Actor, ActorContext, ActorFutureExt, Addr, AsyncContext,
Handler, Running, StreamHandler, WrapFuture,
};
use actix_web::web::Data;
use actix_web_actors::ws;
use std::{
sync::Arc,
time::{Duration, Instant},
};
const HEARTBEAT_INTERVAL: Duration = Duration::from_secs(5);
const CLIENT_TIMEOUT: Duration = Duration::from_secs(30);
pub struct Session {
id: usize,
server: Arc<Addr<Server>>,
heartbeat: Instant,
}
impl Session {
pub fn new(server: Data<Arc<Addr<Server>>>) -> Session {
Session {
id: 0,
server: server.get_ref().clone(),
heartbeat: Instant::now(),
}
}
fn heartbeat(&self, ctx: &mut ws::WebsocketContext<Self>) {
ctx.run_interval(HEARTBEAT_INTERVAL, |act, ctx| {
// check client heartbeats
if Instant::now().duration_since(act.heartbeat) > CLIENT_TIMEOUT {
act.server.do_send(Disconnect { id: act.id });
ctx.stop();
return;
}
ctx.ping(b"");
});
}
}
impl Actor for Session {
type Context = ws::WebsocketContext<Self>;
fn started(&mut self, ctx: &mut Self::Context) {
self.heartbeat(ctx);
self.server
.send(Connect {
addr: ctx.address().recipient(),
})
.into_actor(self)
.then(|res, act, ctx| {
match res {
Ok(res) => act.id = res,
_ => ctx.stop(),
}
fut::ready(())
})
.wait(ctx);
}
fn stopping(&mut self, _: &mut Self::Context) -> Running {
self.server.do_send(Disconnect { id: self.id });
Running::Stop
}
}
impl Handler<ServerMessage> for Session {
type Result = ();
fn handle(&mut self, msg: ServerMessage, ctx: &mut Self::Context) {
ctx.text(msg.0);
}
}
impl StreamHandler<Result<ws::Message, ws::ProtocolError>> for Session {
fn handle(&mut self, msg: Result<ws::Message, ws::ProtocolError>, ctx: &mut Self::Context) {
match msg {
Ok(ws::Message::Ping(msg)) => {
self.heartbeat = Instant::now();
ctx.pong(&msg);
}
Ok(ws::Message::Pong(_)) => {
self.heartbeat = Instant::now();
}
Ok(ws::Message::Text(text)) => {
self.server.do_send(ClientMessage {
msg: "aaaaa".to_string(),
});
}
Ok(ws::Message::Binary(bin)) => ctx.binary(bin),
_ => (),
}
}
}