test express
commit
ea0b273e13
@ -0,0 +1 @@
|
||||
node_modules/
|
||||
@ -0,0 +1,57 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="UTF-8" />
|
||||
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
|
||||
<title>Draw draw draw</title>
|
||||
<script src="draw.js" defer></script>
|
||||
</head>
|
||||
<body>
|
||||
<h1>Disegna <span id="theme"></span></h1>
|
||||
<div id="svg-container">
|
||||
<svg
|
||||
xmlns="http://www.w3.org/2000/svg"
|
||||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||||
version="1.1"
|
||||
id="svgElement"
|
||||
x="0px"
|
||||
y="0px"
|
||||
width="500px"
|
||||
height="500px"
|
||||
viewBox="0 0 500 500"
|
||||
enable-background="new 0 0 500 500"
|
||||
xml:space="preserve"
|
||||
></svg>
|
||||
</div>
|
||||
|
||||
<button id="submit">Send</button>
|
||||
<script>
|
||||
const theme = document.querySelector("#theme");
|
||||
|
||||
const socket = new WebSocket(location.origin.replace(/^http/, "ws"));
|
||||
|
||||
socket.onmessage = (event) => {
|
||||
let message;
|
||||
try {
|
||||
message = JSON.parse(event.data);
|
||||
} catch (e) {}
|
||||
|
||||
if (message?.type == "theme") {
|
||||
theme.innerHTML = message.theme;
|
||||
}
|
||||
};
|
||||
|
||||
document.querySelector("#submit").addEventListener("click", (event) => {
|
||||
const paths = Array.from(document.querySelectorAll("#svgElement path")).reduce(
|
||||
(accumulator, current) => {
|
||||
return (accumulator += current.getAttribute("d"));
|
||||
},
|
||||
""
|
||||
);
|
||||
socket.send(paths);
|
||||
return false;
|
||||
});
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,15 @@
|
||||
{
|
||||
"name": "sal8",
|
||||
"version": "1.0.0",
|
||||
"description": "collective drawings",
|
||||
"main": "server.js",
|
||||
"scripts": {
|
||||
"start": "node server.js"
|
||||
},
|
||||
"author": "",
|
||||
"license": "ISC",
|
||||
"dependencies": {
|
||||
"express": "^4.18.2",
|
||||
"ws": "^8.11.0"
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,100 @@
|
||||
// Great resource from https://stackoverflow.com/a/40700068
|
||||
// Thank you ConnorFan
|
||||
|
||||
var strokeWidth = 4;
|
||||
var bufferSize;
|
||||
|
||||
var svgElement = document.getElementById("svgElement");
|
||||
var rect = svgElement.getBoundingClientRect();
|
||||
var path = null;
|
||||
var strPath;
|
||||
var buffer = []; // Contains the last positions of the mouse cursor
|
||||
|
||||
svgElement.addEventListener("mousedown", function (e) {
|
||||
bufferSize = 8;
|
||||
path = document.createElementNS("http://www.w3.org/2000/svg", "path");
|
||||
path.setAttribute("fill", "none");
|
||||
path.setAttribute("stroke", "currentColor");
|
||||
path.setAttribute("stroke-width", strokeWidth);
|
||||
buffer = [];
|
||||
var pt = getMousePosition(e);
|
||||
appendToBuffer(pt);
|
||||
strPath = "M" + pt.x + " " + pt.y;
|
||||
path.setAttribute("d", strPath);
|
||||
svgElement.appendChild(path);
|
||||
});
|
||||
|
||||
svgElement.addEventListener("mousemove", function (e) {
|
||||
if (path) {
|
||||
appendToBuffer(getMousePosition(e));
|
||||
updateSvgPath();
|
||||
}
|
||||
});
|
||||
|
||||
svgElement.addEventListener("mouseup", function () {
|
||||
if (path) {
|
||||
path = null;
|
||||
}
|
||||
});
|
||||
|
||||
svgElement.addEventListener("mouseleave", function () {
|
||||
if (path) {
|
||||
path = null;
|
||||
}
|
||||
});
|
||||
|
||||
var getMousePosition = function (e) {
|
||||
return {
|
||||
x: e.pageX - rect.left,
|
||||
y: e.pageY - rect.top,
|
||||
};
|
||||
};
|
||||
|
||||
var appendToBuffer = function (pt) {
|
||||
buffer.push(pt);
|
||||
while (buffer.length > bufferSize) {
|
||||
buffer.shift();
|
||||
}
|
||||
};
|
||||
|
||||
// Calculate the average point, starting at offset in the buffer
|
||||
var getAveragePoint = function (offset) {
|
||||
var len = buffer.length;
|
||||
if (len % 2 === 1 || len >= bufferSize) {
|
||||
var totalX = 0;
|
||||
var totalY = 0;
|
||||
var pt, i;
|
||||
var count = 0;
|
||||
for (i = offset; i < len; i++) {
|
||||
count++;
|
||||
pt = buffer[i];
|
||||
totalX += pt.x;
|
||||
totalY += pt.y;
|
||||
}
|
||||
return {
|
||||
x: totalX / count,
|
||||
y: totalY / count,
|
||||
};
|
||||
}
|
||||
return null;
|
||||
};
|
||||
|
||||
var updateSvgPath = function () {
|
||||
var pt = getAveragePoint(0);
|
||||
|
||||
if (pt) {
|
||||
// Get the smoothed part of the path that will not change
|
||||
strPath += " L" + pt.x + " " + pt.y;
|
||||
|
||||
// Get the last part of the path (close to the current mouse position)
|
||||
// This part will change if the mouse moves again
|
||||
var tmpPath = "";
|
||||
for (var offset = 2; offset < buffer.length; offset += 2) {
|
||||
pt = getAveragePoint(offset);
|
||||
tmpPath += " L" + pt.x + " " + pt.y;
|
||||
}
|
||||
|
||||
// Set the complete current path coordinates
|
||||
path.setAttribute("d", strPath + tmpPath);
|
||||
}
|
||||
};
|
||||
@ -0,0 +1,71 @@
|
||||
const { WebSocket, WebSocketServer } = require("ws");
|
||||
const express = require("express");
|
||||
|
||||
const PORT = process.env.PORT || 3000;
|
||||
const index = "index.html";
|
||||
|
||||
const server = express()
|
||||
.use(express.static("public"))
|
||||
.use((req, res) => res.sendFile(index, { root: __dirname }))
|
||||
.listen(PORT, () => console.log(`Listening on ${PORT}`));
|
||||
|
||||
const wss = new WebSocketServer({ server, clientTracking: true });
|
||||
|
||||
let VVVV = null;
|
||||
let USERS = new Set();
|
||||
var theme = "";
|
||||
|
||||
const messageProcessor = {
|
||||
default: (ws, msg) => unknownMsg(msg),
|
||||
hello_v4: (ws, msg) => registerV4(ws, msg),
|
||||
drawings: (ws, msg) => toV4(msg),
|
||||
theme: (ws, msg) => ((theme = msg.theme), broadcast(msg)),
|
||||
};
|
||||
|
||||
const unknownMsg = (msg) => {
|
||||
console.log("❔ Unknown message type...");
|
||||
console.log(msg);
|
||||
};
|
||||
|
||||
const registerV4 = (ws, msg) => {
|
||||
if (VVVV == null) console.log("⬛ vvvv client connected");
|
||||
VVVV = ws;
|
||||
VVVV.on("close", () => {
|
||||
VVVV = null;
|
||||
});
|
||||
};
|
||||
|
||||
const toV4 = (msg) => {
|
||||
if (VVVV?.readyState === WebSocket.OPEN) {
|
||||
VVVV.send(JSON.stringify(msg));
|
||||
}
|
||||
};
|
||||
|
||||
const broadcast = (msg) => {
|
||||
let message = JSON.stringify(msg);
|
||||
for (const user of USERS.values()) {
|
||||
if (user?.readyState === WebSocket.OPEN && user != VVVV) {
|
||||
user.send(message);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
wss.on("connection", (ws) => {
|
||||
USERS.add(ws);
|
||||
ws.send(JSON.stringify({ type: "theme", theme: theme }));
|
||||
|
||||
ws.on("message", (data) => {
|
||||
let message;
|
||||
try {
|
||||
message = JSON.parse(data);
|
||||
} catch (e) {}
|
||||
|
||||
if (message) {
|
||||
(messageProcessor[message.type] || messageProcessor.default)(ws, message);
|
||||
}
|
||||
});
|
||||
|
||||
ws.on("close", () => {
|
||||
USERS.delete(ws);
|
||||
});
|
||||
});
|
||||
Loading…
Reference in New Issue