Compare commits
2 Commits
proposal-5
...
proposal-e
| Author | SHA1 | Date | |
|---|---|---|---|
|
c89c6f95a6 | ||
|
|
78d5352a48 |
1
.gitignore
vendored
Normal file
1
.gitignore
vendored
Normal file
@@ -0,0 +1 @@
|
||||
node_modules/
|
||||
200
PollingApp.html
200
PollingApp.html
@@ -1,200 +0,0 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="UTF-8">
|
||||
<title>Peer‑to‑Peer Poll – up to 14 users (no vote loops)</title>
|
||||
<style>
|
||||
body {font-family:Arial,Helvetica,sans-serif; margin:20px;}
|
||||
#options li {margin:5px 0;}
|
||||
button {margin-left:5px;}
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
|
||||
<h2>Peer‑to‑Peer Poll (max 14 participants)</h2>
|
||||
|
||||
<div id="setup">
|
||||
<label>Your Peer ID: <input id="myId" readonly size="30"></label><br><br>
|
||||
<label>Room host ID (leave empty if you are the first client):
|
||||
<input id="hostId" placeholder="host peer id">
|
||||
</label>
|
||||
<button id="joinBtn">Join / Create Room</button>
|
||||
<p id="status"></p>
|
||||
</div>
|
||||
|
||||
<hr>
|
||||
|
||||
<h3>Poll</h3>
|
||||
<ul id="options"></ul>
|
||||
|
||||
<input id="newOption" placeholder="New option text">
|
||||
<button id="addOptionBtn">Add option</button>
|
||||
|
||||
<script src="https://unpkg.com/peerjs@1.5.4/dist/peerjs.min.js"></script>
|
||||
<script>
|
||||
/* ---------- 1. Initialise PeerJS ---------- */
|
||||
const peer = new Peer(); // public signalling server
|
||||
const myIdInput = document.getElementById('myId');
|
||||
const statusEl = document.getElementById('status');
|
||||
|
||||
let isHost = false; // true for the first client
|
||||
let connections = []; // all open DataConnections
|
||||
let knownPeers = new Set(); // IDs of every peer we know (including host)
|
||||
|
||||
peer.on('open', id => {
|
||||
myIdInput.value = id;
|
||||
statusEl.textContent = 'Enter a host ID (or leave empty) and click Join.';
|
||||
});
|
||||
|
||||
/* ---------- 2. Accept incoming connections (host side) ---------- */
|
||||
peer.on('connection', incoming => {
|
||||
registerConnection(incoming);
|
||||
});
|
||||
|
||||
/* ---------- 3. Join / create a room ---------- */
|
||||
document.getElementById('joinBtn').onclick = () => {
|
||||
const hostId = document.getElementById('hostId').value.trim();
|
||||
if (hostId) {
|
||||
isHost = false;
|
||||
connectToPeer(hostId);
|
||||
statusEl.textContent = `Connecting to host ${hostId}…`;
|
||||
} else {
|
||||
isHost = true;
|
||||
knownPeers.add(peer.id);
|
||||
statusEl.textContent = 'Room created – share this Peer ID with others.';
|
||||
}
|
||||
};
|
||||
|
||||
/* ---------- 4. Helper: connect to a remote peer ---------- */
|
||||
function connectToPeer(peerId) {
|
||||
if (knownPeers.has(peerId)) return;
|
||||
const conn = peer.connect(peerId);
|
||||
registerConnection(conn);
|
||||
}
|
||||
|
||||
/* ---------- 5. Register a DataConnection ---------- */
|
||||
function registerConnection(conn) {
|
||||
if (!conn) return;
|
||||
connections.push(conn);
|
||||
knownPeers.add(conn.peer);
|
||||
|
||||
conn.on('open', () => {
|
||||
// 1️⃣ Send full poll state
|
||||
conn.send({type: 'full', payload: poll, msgId: crypto.randomUUID()});
|
||||
|
||||
// 2️⃣ If we are the host, tell the newcomer about other peers
|
||||
if (isHost) {
|
||||
const others = Array.from(knownPeers).filter(id => id !== conn.peer && id !== peer.id);
|
||||
if (others.length) conn.send({type: 'peer-list', payload: others, msgId: crypto.randomUUID()});
|
||||
}
|
||||
});
|
||||
|
||||
conn.on('data', data => handleMessage(data, conn.peer));
|
||||
conn.on('close', () => {
|
||||
connections = connections.filter(c => c !== conn);
|
||||
knownPeers.delete(conn.peer);
|
||||
});
|
||||
}
|
||||
|
||||
/* ---------- 6. Shared poll state ---------- */
|
||||
let poll = {options: []}; // each option: {id, text, votes}
|
||||
|
||||
/* ---------- 7. Track my own votes ---------- */
|
||||
const myVotes = new Set(); // option.id values
|
||||
|
||||
/* ---------- 8. Remember which messages we already processed ---------- */
|
||||
const seenMsgIds = new Set();
|
||||
|
||||
/* ---------- 9. Broadcast helper (skip the sender) ---------- */
|
||||
function broadcast(msg, except = null) {
|
||||
connections.forEach(c => {
|
||||
if (c.open && c.peer !== except) c.send(msg);
|
||||
});
|
||||
}
|
||||
|
||||
/* ---------- 10. Message handling ---------- */
|
||||
function handleMessage(msg, senderId) {
|
||||
// Ignore duplicates
|
||||
if (seenMsgIds.has(msg.msgId)) return;
|
||||
seenMsgIds.add(msg.msgId);
|
||||
|
||||
switch (msg.type) {
|
||||
case 'full':
|
||||
poll = msg.payload;
|
||||
render();
|
||||
break;
|
||||
|
||||
case 'add':
|
||||
poll.options.push(msg.payload);
|
||||
render();
|
||||
broadcast(msg, senderId); // forward once
|
||||
break;
|
||||
|
||||
case 'vote':
|
||||
const opt = poll.options.find(o => o.id === msg.payload.id);
|
||||
if (opt) opt.votes++;
|
||||
render();
|
||||
broadcast(msg, senderId);
|
||||
break;
|
||||
|
||||
case 'peer-list':
|
||||
msg.payload.forEach(id => {
|
||||
if (id !== peer.id && !knownPeers.has(id)) connectToPeer(id);
|
||||
});
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* ---------- 11. UI rendering ---------- */
|
||||
function render() {
|
||||
const ul = document.getElementById('options');
|
||||
ul.innerHTML = '';
|
||||
poll.options.forEach(opt => {
|
||||
const li = document.createElement('li');
|
||||
li.textContent = `${opt.text} – ${opt.votes} vote(s)`;
|
||||
|
||||
const btn = document.createElement('button');
|
||||
btn.textContent = myVotes.has(opt.id) ? 'Voted' : 'Vote';
|
||||
btn.disabled = myVotes.has(opt.id);
|
||||
btn.onclick = () => {
|
||||
// Record locally – prevents double‑click on the same client
|
||||
myVotes.add(opt.id);
|
||||
btn.textContent = 'Voted';
|
||||
btn.disabled = true;
|
||||
|
||||
const voteMsg = {
|
||||
type: 'vote',
|
||||
payload: {id: opt.id},
|
||||
msgId: crypto.randomUUID()
|
||||
};
|
||||
// Apply locally first
|
||||
opt.votes++;
|
||||
render();
|
||||
// Send to all peers
|
||||
broadcast(voteMsg);
|
||||
};
|
||||
li.appendChild(btn);
|
||||
ul.appendChild(li);
|
||||
});
|
||||
}
|
||||
|
||||
/* ---------- 12. Add new option ---------- */
|
||||
document.getElementById('addOptionBtn').onclick = () => {
|
||||
const txt = document.getElementById('newOption').value.trim();
|
||||
if (!txt) return;
|
||||
const option = {id: crypto.randomUUID(), text: txt, votes: 0};
|
||||
poll.options.push(option);
|
||||
render();
|
||||
|
||||
const addMsg = {
|
||||
type: 'add',
|
||||
payload: option,
|
||||
msgId: crypto.randomUUID()
|
||||
};
|
||||
broadcast(addMsg);
|
||||
document.getElementById('newOption').value = '';
|
||||
};
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
35
README.md
35
README.md
@@ -1,7 +1,28 @@
|
||||
# P2P Poll App
|
||||
|
||||
This is a very simple polling app using peerjs.
|
||||
It runs as a single HTML file and can handle multiple users in one poll room.
|
||||
The app once open is self explanatory.
|
||||
App created with the help of GPTOSS120B.
|
||||
|
||||
# P2P Poll App
|
||||
|
||||
## Install npm packages
|
||||
```
|
||||
npm init -y
|
||||
npm install
|
||||
```
|
||||
|
||||
Note: the frontend obtains the packages `yjs` and `y-websocket` dynamically.
|
||||
|
||||
## Run backend
|
||||
```
|
||||
node backend.js
|
||||
```
|
||||
|
||||
### Note on Yjs suggestion
|
||||
Note that the following server setup is suggested in the Yjs docs (https://docs.yjs.dev/ecosystem/connection-provider/y-websocket):
|
||||
```
|
||||
npm install y-websocket-server
|
||||
HOST=localhost PORT=1000 npx y-websocket
|
||||
```
|
||||
|
||||
However, across a range of npm versions, this does not work.
|
||||
Nevertheless, the essential code from the `y-websocket-server` package is used here as provided in `utils.js`.
|
||||
|
||||
## Run frontend
|
||||
Open "frontend.html" in browser.
|
||||
|
||||
|
||||
31
backend.js
Normal file
31
backend.js
Normal file
@@ -0,0 +1,31 @@
|
||||
import { WebSocketServer } from 'ws';
|
||||
import { setupWSConnection } from './utils.js'
|
||||
|
||||
// Create a WebSocket server
|
||||
const WS_PORT = 8080;
|
||||
const wss = new WebSocketServer({ port: WS_PORT });
|
||||
|
||||
console.log('WebSocket server is running on ws://localhost:' + String(WS_PORT));
|
||||
|
||||
// Connection event handler
|
||||
wss.on('connection', setupWSConnection);
|
||||
/*
|
||||
wss.on('connection', (ws) => {
|
||||
console.log('Client connected');
|
||||
|
||||
// Message event handler
|
||||
ws.on('message', (message) => {
|
||||
let msg_str = String(message);
|
||||
console.log("Received: " + msg_str);
|
||||
|
||||
// If this is a text or state message (no Yjs logic) - echo the message back to the client
|
||||
if (msg_str.startsWith("TEXT_MESSAGE") | msg_str.startsWith("STATE_MESSAGE")) {
|
||||
ws.send(msg_str);
|
||||
}
|
||||
});
|
||||
|
||||
// Close event handler
|
||||
ws.on('close', () => {
|
||||
console.log('Client disconnected');
|
||||
});
|
||||
});*/
|
||||
196
frontend.html
Normal file
196
frontend.html
Normal file
@@ -0,0 +1,196 @@
|
||||
<!DOCTYPE html>
|
||||
<html>
|
||||
<head>
|
||||
<title>Poll Client</title>
|
||||
<style>
|
||||
body {
|
||||
font-family: Arial, sans-serif;
|
||||
max-width: 600px;
|
||||
margin: 0 auto;
|
||||
padding: 20px;
|
||||
}
|
||||
#messages {
|
||||
height: 300px;
|
||||
border: 1px solid #ccc;
|
||||
overflow-y: auto;
|
||||
padding: 10px;
|
||||
margin-bottom: 10px;
|
||||
}
|
||||
.message { margin: 5px 0; }
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<h1>Poll Client</h1>
|
||||
<div id="status">Connecting to server...</div>
|
||||
<div id="status2">Connecting to server...</div>
|
||||
<div id="messages"></div>
|
||||
<div>
|
||||
<input type="text" id="messageInput" placeholder="Type your message">
|
||||
<!--button onclick="sendMessage()">Send</button-->
|
||||
<button id="sendBtn">Send</button>
|
||||
<input id="optionInput" placeholder="Add option">
|
||||
<button id="addBtn">Add</button>
|
||||
<ul id="options"></ul>
|
||||
</div>
|
||||
|
||||
<script type="module">
|
||||
import * as Y from "https://esm.sh/yjs"
|
||||
import { WebsocketProvider } from "https://esm.sh/y-websocket"
|
||||
|
||||
const WS_PORT = 8080;
|
||||
const ydoc = new Y.Doc();
|
||||
const status = document.getElementById('status');
|
||||
const status2 = document.getElementById('status2');
|
||||
const messages = document.getElementById('messages');
|
||||
const messageInput = document.getElementById('messageInput');
|
||||
|
||||
// Connect to the backend (WebSocket server) via Yjs WebsocketProvider
|
||||
const wsp = new WebsocketProvider(
|
||||
'ws://localhost:' + String(WS_PORT), 'poll-room',
|
||||
ydoc
|
||||
)
|
||||
wsp.on('status', event => {
|
||||
//console.log("event.status =", event.status)
|
||||
if (event.status == "connected") {
|
||||
status.textContent = 'Yjs connected to WebSocket server';
|
||||
status.style.color = 'green';
|
||||
}
|
||||
else {
|
||||
status.textContent = 'Yjs disonnected from WebSocket server';
|
||||
status.style.color = 'red';
|
||||
}
|
||||
})
|
||||
wsp.onopen = () => {
|
||||
console.log('connected to y-websocket server');
|
||||
};
|
||||
ydoc.on('update', () => {
|
||||
console.log('Yjs document updated locally');
|
||||
});
|
||||
wsp.on('sync', isSynced => {
|
||||
console.log("isSynced =", isSynced)
|
||||
})
|
||||
|
||||
// Connect to the backend (WebSocket server) via common WebSocket (only for informative messages)
|
||||
const ws = new WebSocket('ws://localhost:' + String(WS_PORT));
|
||||
ws.onopen = () => {
|
||||
status2.textContent = 'WebSocket client connected to WebSocket server';
|
||||
status2.style.color = 'green';
|
||||
};
|
||||
ws.onmessage = (event) => {
|
||||
const message = document.createElement('div');
|
||||
message.className = 'message';
|
||||
message.textContent = event.data;
|
||||
messages.appendChild(message);
|
||||
messages.scrollTop = messages.scrollHeight;
|
||||
};
|
||||
ws.onerror = (error) => {
|
||||
status2.textContent = 'Error: ' + error.message;
|
||||
status2.style.color = 'red';
|
||||
};
|
||||
ws.onclose = () => {
|
||||
status2.textContent = 'WebSocket client disconnected from WebSocket server';
|
||||
status2.style.color = 'red';
|
||||
};
|
||||
|
||||
// Function to send a message
|
||||
function sendMessage(command, payload) {
|
||||
let message = "";
|
||||
if (command === "TEXT_MESSAGE") {
|
||||
message = command + ":" + messageInput.value.trim();
|
||||
messageInput.value = "";
|
||||
}
|
||||
else if (command.startsWith("STATE_MESSAGE--")) {
|
||||
message = command + ":" + payload;
|
||||
}
|
||||
else {
|
||||
console.log("Error: unknown command '" + command + "'")
|
||||
}
|
||||
|
||||
if (message) {
|
||||
/* To make compatible with y-websocket-server API:
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageTextMessage)
|
||||
syncProtocol.writeUpdate(encoder, update)
|
||||
enc_message = encoding.toUint8Array(encoder)*/
|
||||
ws.send(message);
|
||||
}
|
||||
}
|
||||
|
||||
// Send message on button click
|
||||
document.getElementById("sendBtn").onclick = () => {
|
||||
sendMessage("TEXT_MESSAGE", "");
|
||||
};
|
||||
|
||||
// Send message on Enter key
|
||||
messageInput.addEventListener('keypress', (e) => {
|
||||
if (e.key === 'Enter') {
|
||||
sendMessage("TEXT_MESSAGE", "");
|
||||
}
|
||||
});
|
||||
|
||||
// Actual poll logic
|
||||
const optionsMap = ydoc.getMap("options");
|
||||
|
||||
const optionsList = document.getElementById("options");
|
||||
const input = document.getElementById("optionInput");
|
||||
|
||||
function render() {
|
||||
optionsList.innerHTML = ""
|
||||
|
||||
optionsMap.forEach((vote, name) => {
|
||||
// List element for this option
|
||||
const li = document.createElement("li")
|
||||
|
||||
// Label for this option
|
||||
const label = document.createElement("span")
|
||||
label.textContent = name + " — " + vote + " "
|
||||
|
||||
// "Vote"/"Unvote" button
|
||||
const voteBtn = document.createElement("button")
|
||||
if (vote == false) {
|
||||
voteBtn.textContent = "Vote"
|
||||
}
|
||||
else {
|
||||
voteBtn.textContent = "Unvote"
|
||||
}
|
||||
voteBtn.onclick = () => {
|
||||
vote = !vote;
|
||||
optionsMap.set(name, vote);
|
||||
sendMessage("STATE_MESSAGE--" + (vote ? "VOTE" : "UNVOTE"), name);
|
||||
}
|
||||
|
||||
// "Remove" button
|
||||
const removeBtn = document.createElement("button")
|
||||
removeBtn.textContent = "Remove"
|
||||
removeBtn.onclick = () => {
|
||||
optionsMap.delete(name);
|
||||
sendMessage("STATE_MESSAGE--REMOVE", name);
|
||||
}
|
||||
|
||||
li.appendChild(label)
|
||||
li.appendChild(voteBtn)
|
||||
li.appendChild(removeBtn)
|
||||
|
||||
optionsList.appendChild(li)
|
||||
})
|
||||
};
|
||||
|
||||
document.getElementById("addBtn").onclick = () => {
|
||||
const name = input.value.trim()
|
||||
|
||||
if (!name) return
|
||||
|
||||
if (!optionsMap.has(name)) {
|
||||
optionsMap.set(name, false);
|
||||
sendMessage("STATE_MESSAGE--ADD_OPTION", name);
|
||||
}
|
||||
|
||||
input.value = ""
|
||||
};
|
||||
|
||||
optionsMap.observe(render);
|
||||
|
||||
render();
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
144
package-lock.json
generated
Normal file
144
package-lock.json
generated
Normal file
@@ -0,0 +1,144 @@
|
||||
{
|
||||
"name": "yjs-poll",
|
||||
"version": "1.0.0",
|
||||
"lockfileVersion": 3,
|
||||
"requires": true,
|
||||
"packages": {
|
||||
"": {
|
||||
"name": "yjs-poll",
|
||||
"version": "1.0.0",
|
||||
"license": "ISC",
|
||||
"dependencies": {
|
||||
"@y/protocols": "^1.0.6-1",
|
||||
"lib0": "^0.2.102",
|
||||
"ws": "^8.19.0",
|
||||
"yjs": "^14.0.0-7"
|
||||
}
|
||||
},
|
||||
"node_modules/@y/protocols": {
|
||||
"version": "1.0.6-rc.1",
|
||||
"resolved": "https://registry.npmjs.org/@y/protocols/-/protocols-1.0.6-rc.1.tgz",
|
||||
"integrity": "sha512-e/qs7hXcLk/SeNitxMXv2ymozyWFTULwbJEi7cAf/K/iXw9nGwGXHrR5TNluQ/bMwOX1cwuUT0hjEojkfH0gsA==",
|
||||
"license": "MIT",
|
||||
"dependencies": {
|
||||
"lib0": "^1.0.0-rc.1"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=16.0.0",
|
||||
"npm": ">=8.0.0"
|
||||
},
|
||||
"funding": {
|
||||
"type": "GitHub Sponsors ❤",
|
||||
"url": "https://github.com/sponsors/dmonad"
|
||||
},
|
||||
"peerDependencies": {
|
||||
"@y/y": "*"
|
||||
}
|
||||
},
|
||||
"node_modules/@y/protocols/node_modules/lib0": {
|
||||
"version": "1.0.0-rc.4",
|
||||
"resolved": "https://registry.npmjs.org/lib0/-/lib0-1.0.0-rc.4.tgz",
|
||||
"integrity": "sha512-mESL4089ji2HbS19DwAsYJRrtxZDjzMjEzjNR5kpzFBqlhvV0b7F9+SlA2SHOQU1Puu2A9xejKXtElK77swxLA==",
|
||||
"license": "MIT",
|
||||
"bin": {
|
||||
"0ecdsa-generate-keypair": "src/bin/0ecdsa-generate-keypair.js",
|
||||
"0gentesthtml": "src/bin/gentesthtml.js",
|
||||
"0serve": "src/bin/0serve.js"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=16"
|
||||
},
|
||||
"funding": {
|
||||
"type": "GitHub Sponsors ❤",
|
||||
"url": "https://github.com/sponsors/dmonad"
|
||||
}
|
||||
},
|
||||
"node_modules/@y/y": {
|
||||
"version": "14.0.0-16",
|
||||
"resolved": "https://registry.npmjs.org/@y/y/-/y-14.0.0-16.tgz",
|
||||
"integrity": "sha512-4zwbLnLannzUiEdJn9r3IS2FCVdHqADZHLqAivzAuKeoCGZ55JUFebp/YUtrYuTE2ZaBgctxpzulqAAHaahtIA==",
|
||||
"license": "MIT",
|
||||
"peer": true,
|
||||
"dependencies": {
|
||||
"lib0": "^0.2.115-6"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=16.0.0",
|
||||
"npm": ">=8.0.0"
|
||||
},
|
||||
"funding": {
|
||||
"type": "GitHub Sponsors ❤",
|
||||
"url": "https://github.com/sponsors/dmonad"
|
||||
}
|
||||
},
|
||||
"node_modules/isomorphic.js": {
|
||||
"version": "0.2.5",
|
||||
"resolved": "https://registry.npmjs.org/isomorphic.js/-/isomorphic.js-0.2.5.tgz",
|
||||
"integrity": "sha512-PIeMbHqMt4DnUP3MA/Flc0HElYjMXArsw1qwJZcm9sqR8mq3l8NYizFMty0pWwE/tzIGH3EKK5+jes5mAr85yw==",
|
||||
"license": "MIT",
|
||||
"funding": {
|
||||
"type": "GitHub Sponsors ❤",
|
||||
"url": "https://github.com/sponsors/dmonad"
|
||||
}
|
||||
},
|
||||
"node_modules/lib0": {
|
||||
"version": "0.2.117",
|
||||
"resolved": "https://registry.npmjs.org/lib0/-/lib0-0.2.117.tgz",
|
||||
"integrity": "sha512-DeXj9X5xDCjgKLU/7RR+/HQEVzuuEUiwldwOGsHK/sfAfELGWEyTcf0x+uOvCvK3O2zPmZePXWL85vtia6GyZw==",
|
||||
"license": "MIT",
|
||||
"dependencies": {
|
||||
"isomorphic.js": "^0.2.4"
|
||||
},
|
||||
"bin": {
|
||||
"0ecdsa-generate-keypair": "bin/0ecdsa-generate-keypair.js",
|
||||
"0gentesthtml": "bin/gentesthtml.js",
|
||||
"0serve": "bin/0serve.js"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=16"
|
||||
},
|
||||
"funding": {
|
||||
"type": "GitHub Sponsors ❤",
|
||||
"url": "https://github.com/sponsors/dmonad"
|
||||
}
|
||||
},
|
||||
"node_modules/ws": {
|
||||
"version": "8.19.0",
|
||||
"resolved": "https://registry.npmjs.org/ws/-/ws-8.19.0.tgz",
|
||||
"integrity": "sha512-blAT2mjOEIi0ZzruJfIhb3nps74PRWTCz1IjglWEEpQl5XS/UNama6u2/rjFkDDouqr4L67ry+1aGIALViWjDg==",
|
||||
"license": "MIT",
|
||||
"engines": {
|
||||
"node": ">=10.0.0"
|
||||
},
|
||||
"peerDependencies": {
|
||||
"bufferutil": "^4.0.1",
|
||||
"utf-8-validate": ">=5.0.2"
|
||||
},
|
||||
"peerDependenciesMeta": {
|
||||
"bufferutil": {
|
||||
"optional": true
|
||||
},
|
||||
"utf-8-validate": {
|
||||
"optional": true
|
||||
}
|
||||
}
|
||||
},
|
||||
"node_modules/yjs": {
|
||||
"version": "14.0.0-16",
|
||||
"resolved": "https://registry.npmjs.org/yjs/-/yjs-14.0.0-16.tgz",
|
||||
"integrity": "sha512-n7jMrQz4pgU/NFnf4qY53K2adR/fu6ViQ79qVIw6Og+BtuDs1hx3DjOi3iREVnA6tsxQXXVG3gvG0I2kpmAwoQ==",
|
||||
"license": "MIT",
|
||||
"dependencies": {
|
||||
"lib0": "^0.2.115-6"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=16.0.0",
|
||||
"npm": ">=8.0.0"
|
||||
},
|
||||
"funding": {
|
||||
"type": "GitHub Sponsors ❤",
|
||||
"url": "https://github.com/sponsors/dmonad"
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
20
package.json
Normal file
20
package.json
Normal file
@@ -0,0 +1,20 @@
|
||||
{
|
||||
"name": "yjs-poll",
|
||||
"version": "1.0.0",
|
||||
"main": "index.js",
|
||||
"type": "module",
|
||||
"scripts": {
|
||||
"test": "echo \"Error: no test specified\" && exit 1",
|
||||
"y-websocket": "y-websocket"
|
||||
},
|
||||
"keywords": [],
|
||||
"author": "",
|
||||
"license": "ISC",
|
||||
"description": "",
|
||||
"dependencies": {
|
||||
"ws": "^8.19.0",
|
||||
"@y/protocols": "^1.0.6-1",
|
||||
"lib0": "^0.2.102",
|
||||
"yjs": "^14.0.0-7"
|
||||
}
|
||||
}
|
||||
291
utils.js
Normal file
291
utils.js
Normal file
@@ -0,0 +1,291 @@
|
||||
/* Adapted from https://github.com/yjs/y-websocket-server/blob/main/src/server.js, version of 2025-04-02
|
||||
(author: dmonad/Kevin Jahns, MIT license) */
|
||||
|
||||
import * as Y from 'yjs'
|
||||
import * as syncProtocol from '@y/protocols/sync'
|
||||
import * as awarenessProtocol from '@y/protocols/awareness'
|
||||
|
||||
import * as encoding from 'lib0/encoding'
|
||||
import * as decoding from 'lib0/decoding'
|
||||
import * as map from 'lib0/map'
|
||||
|
||||
import * as eventloop from 'lib0/eventloop'
|
||||
|
||||
/*import { callbackHandler, isCallbackSet } from './callback.js'
|
||||
|
||||
const CALLBACK_DEBOUNCE_WAIT = parseInt(process.env.CALLBACK_DEBOUNCE_WAIT || '2000')
|
||||
const CALLBACK_DEBOUNCE_MAXWAIT = parseInt(process.env.CALLBACK_DEBOUNCE_MAXWAIT || '10000')
|
||||
|
||||
const debouncer = eventloop.createDebouncer(CALLBACK_DEBOUNCE_WAIT, CALLBACK_DEBOUNCE_MAXWAIT)*/
|
||||
|
||||
const wsReadyStateConnecting = 0
|
||||
const wsReadyStateOpen = 1
|
||||
const wsReadyStateClosing = 2 // eslint-disable-line
|
||||
const wsReadyStateClosed = 3 // eslint-disable-line
|
||||
|
||||
// disable gc when using snapshots!
|
||||
const gcEnabled = process.env.GC !== 'false' && process.env.GC !== '0'
|
||||
// const persistenceDir = process.env.YPERSISTENCE
|
||||
/**
|
||||
* @type {{bindState: function(string,WSSharedDoc):void, writeState:function(string,WSSharedDoc):Promise<any>, provider: any}|null}
|
||||
*/
|
||||
let persistence = null
|
||||
|
||||
/**
|
||||
* @param {{bindState: function(string,WSSharedDoc):void,
|
||||
* writeState:function(string,WSSharedDoc):Promise<any>,provider:any}|null} persistence_
|
||||
*/
|
||||
export const setPersistence = persistence_ => {
|
||||
persistence = persistence_
|
||||
}
|
||||
|
||||
/**
|
||||
* @return {null|{bindState: function(string,WSSharedDoc):void,
|
||||
* writeState:function(string,WSSharedDoc):Promise<any>}|null} used persistence layer
|
||||
*/
|
||||
export const getPersistence = () => persistence
|
||||
|
||||
/**
|
||||
* @type {Map<string,WSSharedDoc>}
|
||||
*/
|
||||
export const docs = new Map()
|
||||
|
||||
const messageSync = 0
|
||||
const messageAwareness = 1
|
||||
// const messageAuth = 2
|
||||
//const messageTextMessage = 3
|
||||
//const messageStateMessage = 4
|
||||
|
||||
/**
|
||||
* @param {Uint8Array} update
|
||||
* @param {any} _origin
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {any} _tr
|
||||
*/
|
||||
const updateHandler = (update, _origin, doc, _tr) => {
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageSync)
|
||||
syncProtocol.writeUpdate(encoder, update)
|
||||
const message = encoding.toUint8Array(encoder)
|
||||
doc.conns.forEach((_, conn) => send(doc, conn, message))
|
||||
}
|
||||
|
||||
/**
|
||||
* @type {(ydoc: Y.Doc) => Promise<void>}
|
||||
*/
|
||||
let contentInitializor = _ydoc => Promise.resolve()
|
||||
|
||||
/**
|
||||
* This function is called once every time a Yjs document is created. You can
|
||||
* use it to pull data from an external source or initialize content.
|
||||
*
|
||||
* @param {(ydoc: Y.Doc) => Promise<void>} f
|
||||
*/
|
||||
export const setContentInitializor = (f) => {
|
||||
contentInitializor = f
|
||||
}
|
||||
|
||||
export class WSSharedDoc extends Y.Doc {
|
||||
/**
|
||||
* @param {string} name
|
||||
*/
|
||||
constructor (name) {
|
||||
super({ gc: gcEnabled })
|
||||
this.name = name
|
||||
/**
|
||||
* Maps from conn to set of controlled user ids. Delete all user ids from awareness when this conn is closed
|
||||
* @type {Map<Object, Set<number>>}
|
||||
*/
|
||||
this.conns = new Map()
|
||||
/**
|
||||
* @type {awarenessProtocol.Awareness}
|
||||
*/
|
||||
this.awareness = new awarenessProtocol.Awareness(this)
|
||||
this.awareness.setLocalState(null)
|
||||
/**
|
||||
* @param {{ added: Array<number>, updated: Array<number>, removed: Array<number> }} changes
|
||||
* @param {Object | null} conn Origin is the connection that made the change
|
||||
*/
|
||||
const awarenessChangeHandler = ({ added, updated, removed }, conn) => {
|
||||
const changedClients = added.concat(updated, removed)
|
||||
if (conn !== null) {
|
||||
const connControlledIDs = /** @type {Set<number>} */ (this.conns.get(conn))
|
||||
if (connControlledIDs !== undefined) {
|
||||
added.forEach(clientID => { connControlledIDs.add(clientID) })
|
||||
removed.forEach(clientID => { connControlledIDs.delete(clientID) })
|
||||
}
|
||||
}
|
||||
// broadcast awareness update
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageAwareness)
|
||||
encoding.writeVarUint8Array(encoder, awarenessProtocol.encodeAwarenessUpdate(this.awareness, changedClients))
|
||||
const buff = encoding.toUint8Array(encoder)
|
||||
this.conns.forEach((_, c) => {
|
||||
send(this, c, buff)
|
||||
})
|
||||
}
|
||||
this.awareness.on('update', awarenessChangeHandler)
|
||||
this.on('update', /** @type {any} */ (updateHandler))
|
||||
//if (isCallbackSet) {
|
||||
// this.on('update', (_update, _origin, doc) => {
|
||||
// debouncer(() => callbackHandler(/** @type {WSSharedDoc} */ (doc)))
|
||||
// })
|
||||
//}
|
||||
this.whenInitialized = contentInitializor(this)
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets a Y.Doc by name, whether in memory or on disk
|
||||
*
|
||||
* @param {string} docname - the name of the Y.Doc to find or create
|
||||
* @param {boolean} gc - whether to allow gc on the doc (applies only when created)
|
||||
* @return {WSSharedDoc}
|
||||
*/
|
||||
export const getYDoc = (docname, gc = true) => map.setIfUndefined(docs, docname, () => {
|
||||
const doc = new WSSharedDoc(docname)
|
||||
doc.gc = gc
|
||||
if (persistence !== null) {
|
||||
persistence.bindState(docname, doc)
|
||||
}
|
||||
docs.set(docname, doc)
|
||||
return doc
|
||||
})
|
||||
|
||||
/**
|
||||
* @param {any} conn
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {Uint8Array} message
|
||||
*/
|
||||
const messageListener = (conn, doc, message) => {
|
||||
try {
|
||||
const encoder = encoding.createEncoder()
|
||||
const decoder = decoding.createDecoder(new Uint8Array(message))
|
||||
const messageType = decoding.readVarUint(decoder)
|
||||
switch (messageType) {
|
||||
case messageSync:
|
||||
encoding.writeVarUint(encoder, messageSync)
|
||||
syncProtocol.readSyncMessage(decoder, encoder, doc, conn)
|
||||
|
||||
// If the `encoder` only contains the type of reply message and no
|
||||
// message, there is no need to send the message. When `encoder` only
|
||||
// contains the type of reply, its length is 1.
|
||||
if (encoding.length(encoder) > 1) {
|
||||
send(doc, conn, encoding.toUint8Array(encoder))
|
||||
}
|
||||
break
|
||||
case messageAwareness: {
|
||||
awarenessProtocol.applyAwarenessUpdate(doc.awareness, decoding.readVarUint8Array(decoder), conn)
|
||||
break
|
||||
}
|
||||
// If this is a text or a message (no Yjs logic) - echo the message back to the client
|
||||
default: {
|
||||
conn.send(String(message))
|
||||
console.log(String(message))
|
||||
break
|
||||
}
|
||||
}
|
||||
} catch (err) {
|
||||
console.error(err)
|
||||
// @ts-ignore
|
||||
doc.emit('error', [err])
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {any} conn
|
||||
*/
|
||||
const closeConn = (doc, conn) => {
|
||||
if (doc.conns.has(conn)) {
|
||||
/**
|
||||
* @type {Set<number>}
|
||||
*/
|
||||
// @ts-ignore
|
||||
const controlledIds = doc.conns.get(conn)
|
||||
doc.conns.delete(conn)
|
||||
awarenessProtocol.removeAwarenessStates(doc.awareness, Array.from(controlledIds), null)
|
||||
if (doc.conns.size === 0 && persistence !== null) {
|
||||
// if persisted, we store state and destroy ydocument
|
||||
persistence.writeState(doc.name, doc).then(() => {
|
||||
doc.destroy()
|
||||
})
|
||||
docs.delete(doc.name)
|
||||
}
|
||||
}
|
||||
conn.close()
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {import('ws').WebSocket} conn
|
||||
* @param {Uint8Array} m
|
||||
*/
|
||||
const send = (doc, conn, m) => {
|
||||
if (conn.readyState !== wsReadyStateConnecting && conn.readyState !== wsReadyStateOpen) {
|
||||
closeConn(doc, conn)
|
||||
}
|
||||
try {
|
||||
conn.send(m, {}, err => { err != null && closeConn(doc, conn) })
|
||||
} catch (e) {
|
||||
closeConn(doc, conn)
|
||||
}
|
||||
}
|
||||
|
||||
const pingTimeout = 30000
|
||||
|
||||
/**
|
||||
* @param {import('ws').WebSocket} conn
|
||||
* @param {import('http').IncomingMessage} req
|
||||
* @param {any} opts
|
||||
*/
|
||||
export const setupWSConnection = (conn, req, { docName = (req.url || '').slice(1).split('?')[0], gc = true } = {}) => {
|
||||
conn.binaryType = 'arraybuffer'
|
||||
// get doc, initialize if it does not exist yet
|
||||
const doc = getYDoc(docName, gc)
|
||||
doc.conns.set(conn, new Set())
|
||||
// listen and reply to events
|
||||
conn.on('message', /** @param {ArrayBuffer} message */ message => messageListener(conn, doc, message))
|
||||
|
||||
// Check if connection is still alive
|
||||
let pongReceived = true
|
||||
const pingInterval = setInterval(() => {
|
||||
if (!pongReceived) {
|
||||
if (doc.conns.has(conn)) {
|
||||
closeConn(doc, conn)
|
||||
}
|
||||
clearInterval(pingInterval)
|
||||
} else if (doc.conns.has(conn)) {
|
||||
pongReceived = false
|
||||
try {
|
||||
conn.ping()
|
||||
} catch (e) {
|
||||
closeConn(doc, conn)
|
||||
clearInterval(pingInterval)
|
||||
}
|
||||
}
|
||||
}, pingTimeout)
|
||||
conn.on('close', () => {
|
||||
closeConn(doc, conn)
|
||||
clearInterval(pingInterval)
|
||||
})
|
||||
conn.on('pong', () => {
|
||||
pongReceived = true
|
||||
})
|
||||
// put the following in a variables in a block so the interval handlers don't keep in in
|
||||
// scope
|
||||
{
|
||||
// send sync step 1
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageSync)
|
||||
syncProtocol.writeSyncStep1(encoder, doc)
|
||||
send(doc, conn, encoding.toUint8Array(encoder))
|
||||
const awarenessStates = doc.awareness.getStates()
|
||||
if (awarenessStates.size > 0) {
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageAwareness)
|
||||
encoding.writeVarUint8Array(encoder, awarenessProtocol.encodeAwarenessUpdate(doc.awareness, Array.from(awarenessStates.keys())))
|
||||
send(doc, conn, encoding.toUint8Array(encoder))
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user