392 lines
No EOL
12 KiB
JavaScript
392 lines
No EOL
12 KiB
JavaScript
//realtime
|
|
//external modules
|
|
var cookie = require('cookie');
|
|
var cookieParser = require('cookie-parser');
|
|
var url = require('url');
|
|
var async = require('async');
|
|
var LZString = require('lz-string');
|
|
var shortId = require('shortid');
|
|
var randomcolor = require("randomcolor");
|
|
|
|
//core
|
|
var config = require("../config.js");
|
|
|
|
//others
|
|
var db = require("./db.js");
|
|
var Note = require("./note.js");
|
|
var User = require("./user.js");
|
|
|
|
//public
|
|
var realtime = {
|
|
secure: secure,
|
|
connection: connection,
|
|
getStatus: getStatus
|
|
};
|
|
|
|
function secure(socket, next) {
|
|
try {
|
|
var handshakeData = socket.request;
|
|
if (handshakeData.headers.cookie) {
|
|
handshakeData.cookie = cookie.parse(handshakeData.headers.cookie);
|
|
handshakeData.sessionID = cookieParser.signedCookie(handshakeData.cookie[config.sessionname], config.sessionsecret);
|
|
if (handshakeData.cookie[config.sessionname] == handshakeData.sessionID) {
|
|
next(new Error('AUTH failed: Cookie is invalid.'));
|
|
}
|
|
} else {
|
|
next(new Error('AUTH failed: No cookie transmitted.'));
|
|
}
|
|
if (config.debug)
|
|
console.log("AUTH success cookie: " + handshakeData.sessionID);
|
|
|
|
next();
|
|
} catch (ex) {
|
|
next(new Error("AUTH failed:" + JSON.stringify(ex)));
|
|
}
|
|
}
|
|
|
|
//actions
|
|
var users = {};
|
|
var notes = {};
|
|
var updater = setInterval(function () {
|
|
async.each(Object.keys(notes), function (key, callback) {
|
|
var note = notes[key];
|
|
if (note.isDirty) {
|
|
if (config.debug)
|
|
console.log("updater found dirty note: " + key);
|
|
var title = Note.getNoteTitle(LZString.decompressFromBase64(note.body));
|
|
db.saveToDB(key, title, note.body,
|
|
function (err, result) {});
|
|
note.isDirty = false;
|
|
}
|
|
callback();
|
|
}, function (err) {
|
|
if (err) return console.error('updater error', err);
|
|
});
|
|
}, 5000);
|
|
|
|
function getStatus(callback) {
|
|
db.countFromDB(function (err, data) {
|
|
if (err) return console.log(err);
|
|
var regusers = 0;
|
|
var distinctregusers = 0;
|
|
var distinctaddresses = [];
|
|
Object.keys(users).forEach(function (key) {
|
|
var value = users[key];
|
|
if(value.login)
|
|
regusers++;
|
|
var found = false;
|
|
for (var i = 0; i < distinctaddresses.length; i++) {
|
|
if (value.address == distinctaddresses[i]) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found)
|
|
distinctaddresses.push(value.address);
|
|
if(!found && value.login)
|
|
distinctregusers++;
|
|
});
|
|
User.getUserCount(function (err, regcount) {
|
|
if (err) {
|
|
console.log('get status failed: ' + err);
|
|
return;
|
|
}
|
|
if (callback)
|
|
callback({
|
|
onlineNotes: Object.keys(notes).length,
|
|
onlineUsers: Object.keys(users).length,
|
|
distinctOnlineUsers: distinctaddresses.length,
|
|
notesCount: data.rows[0].count,
|
|
registeredUsers: regcount,
|
|
onlineRegisteredUsers: regusers,
|
|
distinctOnlineRegisteredUsers: distinctregusers
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
function getNotenameFromSocket(socket) {
|
|
var hostUrl = url.parse(socket.handshake.headers.referer);
|
|
var notename = hostUrl.pathname.split('/')[1];
|
|
if (notename == config.featuresnotename) {
|
|
return notename;
|
|
}
|
|
if (!Note.checkNoteIdValid(notename)) {
|
|
socket.emit('info', {
|
|
code: 404
|
|
});
|
|
return socket.disconnect();
|
|
}
|
|
notename = LZString.decompressFromBase64(notename);
|
|
return notename;
|
|
}
|
|
|
|
function emitOnlineUsers(socket) {
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename || !notes[notename]) return;
|
|
var users = [];
|
|
Object.keys(notes[notename].users).forEach(function (key) {
|
|
var user = notes[notename].users[key];
|
|
if (user)
|
|
users.push({
|
|
id: user.id,
|
|
color: user.color,
|
|
cursor: user.cursor
|
|
});
|
|
});
|
|
notes[notename].socks.forEach(function (sock) {
|
|
sock.emit('online users', {
|
|
count: notes[notename].socks.length,
|
|
users: users
|
|
});
|
|
});
|
|
}
|
|
|
|
var isConnectionBusy = false;
|
|
var connectionSocketQueue = [];
|
|
var isDisconnectBusy = false;
|
|
var disconnectSocketQueue = [];
|
|
|
|
function finishConnection(socket, notename) {
|
|
notes[notename].users[socket.id] = users[socket.id];
|
|
notes[notename].socks.push(socket);
|
|
emitOnlineUsers(socket);
|
|
socket.emit('refresh', {
|
|
body: notes[notename].body
|
|
});
|
|
|
|
//clear finished socket in queue
|
|
for (var i = 0; i < connectionSocketQueue.length; i++) {
|
|
if (connectionSocketQueue[i].id == socket.id)
|
|
connectionSocketQueue.splice(i, 1);
|
|
}
|
|
//seek for next socket
|
|
isConnectionBusy = false;
|
|
if (connectionSocketQueue.length > 0)
|
|
startConnection(connectionSocketQueue[0]);
|
|
|
|
if (config.debug) {
|
|
console.log('SERVER connected a client to [' + notename + ']:');
|
|
console.log(JSON.stringify(users[socket.id]));
|
|
//console.log(notes);
|
|
getStatus(function (data) {
|
|
console.log(JSON.stringify(data));
|
|
});
|
|
}
|
|
}
|
|
|
|
function startConnection(socket) {
|
|
if (isConnectionBusy) return;
|
|
isConnectionBusy = true;
|
|
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename) return;
|
|
|
|
if (!notes[notename]) {
|
|
db.readFromDB(notename, function (err, data) {
|
|
if (err) {
|
|
socket.emit('info', {
|
|
code: 404
|
|
});
|
|
socket.disconnect();
|
|
//clear err socket in queue
|
|
for (var i = 0; i < connectionSocketQueue.length; i++) {
|
|
if (connectionSocketQueue[i].id == socket.id)
|
|
connectionSocketQueue.splice(i, 1);
|
|
}
|
|
isConnectionBusy = false;
|
|
return console.error(err);
|
|
}
|
|
var body = data.rows[0].content;
|
|
notes[notename] = {
|
|
socks: [],
|
|
body: body,
|
|
isDirty: false,
|
|
users: {}
|
|
};
|
|
finishConnection(socket, notename);
|
|
});
|
|
} else {
|
|
finishConnection(socket, notename);
|
|
}
|
|
}
|
|
|
|
function disconnect(socket) {
|
|
if (isDisconnectBusy) return;
|
|
isDisconnectBusy = true;
|
|
|
|
if (config.debug) {
|
|
console.log("SERVER disconnected a client");
|
|
console.log(JSON.stringify(users[socket.id]));
|
|
}
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename) return;
|
|
if (users[socket.id]) {
|
|
delete users[socket.id];
|
|
}
|
|
if (notes[notename]) {
|
|
delete notes[notename].users[socket.id];
|
|
var index = notes[notename].socks.indexOf(socket);
|
|
if (index > -1) {
|
|
notes[notename].socks.splice(index, 1);
|
|
}
|
|
if (Object.keys(notes[notename].users).length <= 0) {
|
|
var title = Note.getNoteTitle(LZString.decompressFromBase64(notes[notename].body));
|
|
db.saveToDB(notename, title, notes[notename].body,
|
|
function (err, result) {
|
|
delete notes[notename];
|
|
if (config.debug) {
|
|
//console.log(notes);
|
|
getStatus(function (data) {
|
|
console.log(JSON.stringify(data));
|
|
});
|
|
}
|
|
});
|
|
}
|
|
}
|
|
emitOnlineUsers(socket);
|
|
|
|
//clear finished socket in queue
|
|
for (var i = 0; i < disconnectSocketQueue.length; i++) {
|
|
if (disconnectSocketQueue[i].id == socket.id)
|
|
disconnectSocketQueue.splice(i, 1);
|
|
}
|
|
//seek for next socket
|
|
isDisconnectBusy = false;
|
|
if (disconnectSocketQueue.length > 0)
|
|
disconnect(disconnectSocketQueue[0]);
|
|
|
|
if (config.debug) {
|
|
//console.log(notes);
|
|
getStatus(function (data) {
|
|
console.log(JSON.stringify(data));
|
|
});
|
|
}
|
|
}
|
|
|
|
|
|
function connection(socket) {
|
|
users[socket.id] = {
|
|
id: socket.id,
|
|
address: socket.handshake.address,
|
|
'user-agent': socket.handshake.headers['user-agent'],
|
|
otk: shortId.generate(),
|
|
color: randomcolor({
|
|
luminosity: 'light'
|
|
}),
|
|
cursor: null,
|
|
login: false
|
|
};
|
|
|
|
connectionSocketQueue.push(socket);
|
|
startConnection(socket);
|
|
|
|
//when a new client coming or received a client refresh request
|
|
socket.on('refresh', function (body_) {
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename) return;
|
|
if (config.debug)
|
|
console.log('SERVER received [' + notename + '] data updated: ' + socket.id);
|
|
if (notes[notename].body != body_) {
|
|
notes[notename].body = body_;
|
|
notes[notename].isDirty = true;
|
|
}
|
|
});
|
|
|
|
socket.on('user status', function (data) {
|
|
if(data)
|
|
users[socket.id].login = data.login;
|
|
});
|
|
|
|
socket.on('online users', function () {
|
|
emitOnlineUsers(socket);
|
|
});
|
|
|
|
socket.on('version', function () {
|
|
socket.emit('version', config.version);
|
|
});
|
|
|
|
socket.on('cursor focus', function (data) {
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename || !notes[notename]) return;
|
|
users[socket.id].cursor = data;
|
|
notes[notename].socks.forEach(function (sock) {
|
|
if (sock != socket) {
|
|
var out = {
|
|
id: socket.id,
|
|
color: users[socket.id].color,
|
|
cursor: data
|
|
};
|
|
sock.emit('cursor focus', out);
|
|
}
|
|
});
|
|
});
|
|
|
|
socket.on('cursor activity', function (data) {
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename || !notes[notename]) return;
|
|
users[socket.id].cursor = data;
|
|
notes[notename].socks.forEach(function (sock) {
|
|
if (sock != socket) {
|
|
var out = {
|
|
id: socket.id,
|
|
color: users[socket.id].color,
|
|
cursor: data
|
|
};
|
|
sock.emit('cursor activity', out);
|
|
}
|
|
});
|
|
});
|
|
|
|
socket.on('cursor blur', function () {
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename || !notes[notename]) return;
|
|
users[socket.id].cursor = null;
|
|
notes[notename].socks.forEach(function (sock) {
|
|
if (sock != socket) {
|
|
var out = {
|
|
id: socket.id
|
|
};
|
|
if (sock != socket) {
|
|
sock.emit('cursor blur', out);
|
|
}
|
|
}
|
|
});
|
|
});
|
|
|
|
//when a new client disconnect
|
|
socket.on('disconnect', function () {
|
|
disconnectSocketQueue.push(socket);
|
|
disconnect(socket);
|
|
});
|
|
|
|
//when received client change data request
|
|
socket.on('change', function (op) {
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename) return;
|
|
op = LZString.decompressFromBase64(op);
|
|
if (op)
|
|
op = JSON.parse(op);
|
|
if (config.debug)
|
|
console.log('SERVER received [' + notename + '] data changed: ' + socket.id + ', op:' + JSON.stringify(op));
|
|
switch (op.origin) {
|
|
case '+input':
|
|
case '+delete':
|
|
case 'paste':
|
|
case 'cut':
|
|
case 'undo':
|
|
case 'redo':
|
|
case 'drag':
|
|
notes[notename].socks.forEach(function (sock) {
|
|
if (sock != socket) {
|
|
if (config.debug)
|
|
console.log('SERVER emit sync data out [' + notename + ']: ' + sock.id + ', op:' + JSON.stringify(op));
|
|
sock.emit('change', LZString.compressToBase64(JSON.stringify(op)));
|
|
}
|
|
});
|
|
break;
|
|
}
|
|
});
|
|
}
|
|
|
|
module.exports = realtime; |