mirror of
https://github.com/hedgedoc/hedgedoc.git
synced 2024-11-25 11:16:31 -05:00
656 lines
No EOL
21 KiB
JavaScript
656 lines
No EOL
21 KiB
JavaScript
//realtime
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//external modules
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var cookie = require('cookie');
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var cookieParser = require('cookie-parser');
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var url = require('url');
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var async = require('async');
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var LZString = require('lz-string');
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var shortId = require('shortid');
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var randomcolor = require("randomcolor");
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var Chance = require('chance'),
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chance = new Chance();
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var md5 = require("blueimp-md5").md5;
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var moment = require('moment');
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//core
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var config = require("../config.js");
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var logger = require("./logger.js");
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//others
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var db = require("./db.js");
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var Note = require("./note.js");
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var User = require("./user.js");
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//public
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var realtime = {
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onAuthorizeSuccess: onAuthorizeSuccess,
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onAuthorizeFail: onAuthorizeFail,
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secure: secure,
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connection: connection,
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getStatus: getStatus
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};
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function onAuthorizeSuccess(data, accept) {
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accept(null, true);
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}
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function onAuthorizeFail(data, message, error, accept) {
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if (error) throw new Error(message);
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accept(null, true);
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}
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function secure(socket, next) {
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try {
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var handshakeData = socket.request;
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if (handshakeData.headers.cookie) {
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handshakeData.cookie = cookie.parse(handshakeData.headers.cookie);
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handshakeData.sessionID = cookieParser.signedCookie(handshakeData.cookie[config.sessionname], config.sessionsecret);
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if (handshakeData.cookie[config.sessionname] == handshakeData.sessionID) {
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next(new Error('AUTH failed: Cookie is invalid.'));
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}
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} else {
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next(new Error('AUTH failed: No cookie transmitted.'));
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}
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if (config.debug)
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logger.info("AUTH success cookie: " + handshakeData.sessionID);
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next();
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} catch (ex) {
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next(new Error("AUTH failed:" + JSON.stringify(ex)));
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}
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}
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//actions
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var users = {};
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var notes = {};
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var updater = setInterval(function () {
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async.each(Object.keys(notes), function (key, callback) {
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var note = notes[key];
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if (note.isDirty) {
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if (config.debug)
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logger.info("updater found dirty note: " + key);
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var body = LZString.decompressFromUTF16(note.body);
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var title = Note.getNoteTitle(body);
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title = LZString.compressToBase64(title);
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body = LZString.compressToBase64(body);
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db.saveToDB(key, title, body,
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function (err, result) {});
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note.isDirty = false;
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}
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callback();
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}, function (err) {
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if (err) return logger.error('updater error', err);
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});
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}, 5000);
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function getStatus(callback) {
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db.countFromDB(function (err, data) {
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if (err) return logger.info(err);
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var distinctaddresses = [];
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var regaddresses = [];
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var distinctregaddresses = [];
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Object.keys(users).forEach(function (key) {
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var user = users[key];
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var found = false;
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for (var i = 0; i < distinctaddresses.length; i++) {
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if (user.address == distinctaddresses[i]) {
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found = true;
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break;
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}
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}
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if (!found) {
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distinctaddresses.push(user.address);
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}
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if (user.login) {
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regaddresses.push(user.address);
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var found = false;
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for (var i = 0; i < distinctregaddresses.length; i++) {
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if (user.address == distinctregaddresses[i]) {
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found = true;
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break;
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}
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}
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if (!found) {
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distinctregaddresses.push(user.address);
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}
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}
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});
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User.getUserCount(function (err, regcount) {
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if (err) {
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logger.error('get status failed: ' + err);
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return;
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}
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if (callback)
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callback({
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onlineNotes: Object.keys(notes).length,
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onlineUsers: Object.keys(users).length,
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distinctOnlineUsers: distinctaddresses.length,
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notesCount: data.rows[0].count,
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registeredUsers: regcount,
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onlineRegisteredUsers: regaddresses.length,
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distinctOnlineRegisteredUsers: distinctregaddresses.length
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});
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});
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});
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}
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function getNotenameFromSocket(socket) {
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var hostUrl = url.parse(socket.handshake.headers.referer);
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var notename = hostUrl.pathname.split('/')[1];
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if (notename == config.featuresnotename) {
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return notename;
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}
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if (!Note.checkNoteIdValid(notename)) {
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socket.emit('info', {
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code: 404
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});
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return socket.disconnect();
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}
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notename = LZString.decompressFromBase64(notename);
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return notename;
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}
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function emitOnlineUsers(socket) {
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var notename = getNotenameFromSocket(socket);
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if (!notename || !notes[notename]) return;
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var users = [];
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Object.keys(notes[notename].users).forEach(function (key) {
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var user = notes[notename].users[key];
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if (user)
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users.push(buildUserOutData(user));
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});
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var out = {
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users: users
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};
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out = LZString.compressToUTF16(JSON.stringify(out));
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for (var i = 0, l = notes[notename].socks.length; i < l; i++) {
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var sock = notes[notename].socks[i];
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if (sock && out)
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sock.emit('online users', out);
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};
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}
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function emitUserStatus(socket) {
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var notename = getNotenameFromSocket(socket);
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if (!notename || !notes[notename]) return;
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var out = buildUserOutData(users[socket.id]);
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for (var i = 0, l = notes[notename].socks.length; i < l; i++) {
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var sock = notes[notename].socks[i];
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if (sock != socket) {
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sock.emit('user status', out);
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}
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};
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}
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function emitRefresh(socket) {
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var notename = getNotenameFromSocket(socket);
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if (!notename || !notes[notename]) return;
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var note = notes[notename];
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socket.emit('refresh', {
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owner: note.owner,
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permission: note.permission,
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body: note.body,
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otk: note.otk,
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hash: note.hash,
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updatetime: note.updatetime
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});
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}
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var isConnectionBusy = false;
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var connectionSocketQueue = [];
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var isDisconnectBusy = false;
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var disconnectSocketQueue = [];
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function finishConnection(socket, notename) {
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notes[notename].users[socket.id] = users[socket.id];
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notes[notename].socks.push(socket);
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emitOnlineUsers(socket);
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emitRefresh(socket);
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//clear finished socket in queue
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for (var i = 0; i < connectionSocketQueue.length; i++) {
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if (connectionSocketQueue[i].id == socket.id)
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connectionSocketQueue.splice(i, 1);
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}
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//seek for next socket
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isConnectionBusy = false;
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if (connectionSocketQueue.length > 0)
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startConnection(connectionSocketQueue[0]);
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if (config.debug) {
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logger.info('SERVER connected a client to [' + notename + ']:');
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logger.info(JSON.stringify(users[socket.id]));
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//logger.info(notes);
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getStatus(function (data) {
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logger.info(JSON.stringify(data));
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});
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}
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}
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function startConnection(socket) {
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if (isConnectionBusy) return;
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isConnectionBusy = true;
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var notename = getNotenameFromSocket(socket);
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if (!notename) return;
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if (!notes[notename]) {
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db.readFromDB(notename, function (err, data) {
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if (err) {
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socket.emit('info', {
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code: 404
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});
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socket.disconnect();
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//clear err socket in queue
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for (var i = 0; i < connectionSocketQueue.length; i++) {
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if (connectionSocketQueue[i].id == socket.id)
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connectionSocketQueue.splice(i, 1);
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}
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isConnectionBusy = false;
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return logger.error(err);
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}
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var owner = data.rows[0].owner;
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var permission = "freely";
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if (owner && owner != "null") {
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permission = "editable";
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}
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Note.findOrNewNote(notename, permission, function (err, note) {
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if (err) {
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responseError(res, "404", "Not Found", "oops.");
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return;
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}
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var body = LZString.decompressFromBase64(data.rows[0].content);
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body = LZString.compressToUTF16(body);
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var updatetime = data.rows[0].update_time;
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notes[notename] = {
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owner: owner,
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permission: note.permission,
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socks: [],
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body: body,
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isDirty: false,
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users: {},
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otk: shortId.generate(),
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hash: md5(body),
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updatetime: moment(updatetime).valueOf()
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};
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finishConnection(socket, notename);
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});
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});
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} else {
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finishConnection(socket, notename);
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}
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}
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function disconnect(socket) {
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if (isDisconnectBusy) return;
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isDisconnectBusy = true;
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if (config.debug) {
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logger.info("SERVER disconnected a client");
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logger.info(JSON.stringify(users[socket.id]));
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}
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var notename = getNotenameFromSocket(socket);
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if (!notename) return;
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if (users[socket.id]) {
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delete users[socket.id];
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}
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if (notes[notename]) {
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delete notes[notename].users[socket.id];
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do {
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var index = notes[notename].socks.indexOf(socket);
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if (index != -1) {
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notes[notename].socks.splice(index, 1);
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}
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} while (index != -1);
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if (Object.keys(notes[notename].users).length <= 0) {
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if (notes[notename].isDirty) {
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var body = LZString.decompressFromUTF16(notes[notename].body);
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var title = Note.getNoteTitle(body);
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title = LZString.compressToBase64(title);
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body = LZString.compressToBase64(body);
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db.saveToDB(notename, title, body,
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function (err, result) {
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delete notes[notename];
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if (config.debug) {
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//logger.info(notes);
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getStatus(function (data) {
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logger.info(JSON.stringify(data));
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});
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}
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});
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} else {
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delete notes[notename];
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}
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}
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}
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emitOnlineUsers(socket);
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//clear finished socket in queue
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for (var i = 0; i < disconnectSocketQueue.length; i++) {
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if (disconnectSocketQueue[i].id == socket.id)
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disconnectSocketQueue.splice(i, 1);
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}
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//seek for next socket
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isDisconnectBusy = false;
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if (disconnectSocketQueue.length > 0)
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disconnect(disconnectSocketQueue[0]);
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if (config.debug) {
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//logger.info(notes);
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getStatus(function (data) {
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logger.info(JSON.stringify(data));
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});
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}
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}
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function buildUserOutData(user) {
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var out = {
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id: user.id,
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login: user.login,
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userid: user.userid,
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color: user.color,
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cursor: user.cursor,
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name: user.name,
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idle: user.idle,
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type: user.type
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};
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return out;
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}
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function updateUserData(socket, user) {
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//retrieve user data from passport
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if (socket.request.user && socket.request.user.logged_in) {
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var profile = JSON.parse(socket.request.user.profile);
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/*
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var photo = null;
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switch(profile.provider) {
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case "facebook":
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console.log(profile);
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break;
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case "twitter":
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photo = profile.photos[0];
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break;
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case "github":
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photo = profile.avatar_url;
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break;
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case "dropbox":
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//not image api provided
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break;
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}
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user.photo = photo;
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*/
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user.name = profile.displayName || profile.username;
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user.userid = socket.request.user._id;
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user.login = true;
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} else {
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user.userid = null;
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user.name = 'Guest ' + chance.last();
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user.login = false;
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}
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}
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function connection(socket) {
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//split notename from socket
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var notename = getNotenameFromSocket(socket);
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//initialize user data
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//random color
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var color = randomcolor({
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luminosity: 'light'
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});
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//make sure color not duplicated or reach max random count
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if (notename && notes[notename]) {
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var randomcount = 0;
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var maxrandomcount = 5;
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var found = false;
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do {
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Object.keys(notes[notename].users).forEach(function (user) {
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if (user.color == color) {
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found = true;
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return;
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}
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});
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if (found) {
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color = randomcolor({
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luminosity: 'light'
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});
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randomcount++;
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}
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} while (found && randomcount < maxrandomcount);
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}
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//create user data
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users[socket.id] = {
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id: socket.id,
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address: socket.handshake.address,
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'user-agent': socket.handshake.headers['user-agent'],
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color: color,
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cursor: null,
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login: false,
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userid: null,
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name: null,
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idle: false,
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type: null
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};
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updateUserData(socket, users[socket.id]);
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//start connection
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connectionSocketQueue.push(socket);
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startConnection(socket);
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//received client refresh request
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socket.on('refresh', function () {
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emitRefresh(socket);
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});
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//received client data updated
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socket.on('update', function (body_) {
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var notename = getNotenameFromSocket(socket);
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if (!notename || !notes[notename]) return;
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if (config.debug)
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logger.info('SERVER received [' + notename + '] data updated: ' + socket.id);
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var note = notes[notename];
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if (note.body != body_) {
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note.body = body_;
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note.hash = md5(body_);
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note.updatetime = Date.now();
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note.isDirty = true;
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}
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var out = {
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id: socket.id,
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hash: note.hash,
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updatetime: note.updatetime
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};
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for (var i = 0, l = note.socks.length; i < l; i++) {
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var sock = note.socks[i];
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sock.emit('check', out);
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};
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});
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//received user status
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socket.on('user status', function (data) {
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var notename = getNotenameFromSocket(socket);
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if (!notename || !notes[notename]) return;
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if (config.debug)
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logger.info('SERVER received [' + notename + '] user status from [' + socket.id + ']: ' + JSON.stringify(data));
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if (data) {
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var user = users[socket.id];
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user.idle = data.idle;
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user.type = data.type;
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}
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emitUserStatus(socket);
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});
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//received note permission change request
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socket.on('permission', function (permission) {
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//need login to do more actions
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if (socket.request.user && socket.request.user.logged_in) {
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var notename = getNotenameFromSocket(socket);
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if (!notename || !notes[notename]) return;
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var note = notes[notename];
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//Only owner can change permission
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if (note.owner == socket.request.user._id) {
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note.permission = permission;
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Note.findNote(notename, function (err, _note) {
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if (err || !_note) {
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return;
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}
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Note.updatePermission(_note, permission, function (err, _note) {
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if (err || !_note) {
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return;
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}
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var out = {
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permission: permission
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};
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for (var i = 0, l = note.socks.length; i < l; i++) {
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var sock = note.socks[i];
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sock.emit('permission', out);
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};
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});
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});
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}
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}
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});
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//reveiced when user logout or changed
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socket.on('user changed', function () {
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logger.info('user changed');
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var notename = getNotenameFromSocket(socket);
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if (!notename || !notes[notename]) return;
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updateUserData(socket, notes[notename].users[socket.id]);
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emitOnlineUsers(socket);
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});
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//received sync of online users request
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socket.on('online users', function () {
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var notename = getNotenameFromSocket(socket);
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if (!notename || !notes[notename]) return;
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var users = [];
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Object.keys(notes[notename].users).forEach(function (key) {
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var user = notes[notename].users[key];
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if (user)
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users.push(buildUserOutData(user));
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});
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var out = {
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users: users
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};
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out = LZString.compressToUTF16(JSON.stringify(out));
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socket.emit('online users', out);
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});
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//check version
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socket.on('version', function () {
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socket.emit('version', config.version);
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});
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//received cursor focus
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socket.on('cursor focus', function (data) {
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var notename = getNotenameFromSocket(socket);
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if (!notename || !notes[notename]) return;
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users[socket.id].cursor = data;
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var out = buildUserOutData(users[socket.id]);
|
|
for (var i = 0, l = notes[notename].socks.length; i < l; i++) {
|
|
var sock = notes[notename].socks[i];
|
|
if (sock != socket) {
|
|
sock.emit('cursor focus', out);
|
|
}
|
|
};
|
|
});
|
|
|
|
//received cursor activity
|
|
socket.on('cursor activity', function (data) {
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename || !notes[notename]) return;
|
|
users[socket.id].cursor = data;
|
|
var out = buildUserOutData(users[socket.id]);
|
|
for (var i = 0, l = notes[notename].socks.length; i < l; i++) {
|
|
var sock = notes[notename].socks[i];
|
|
if (sock != socket) {
|
|
sock.emit('cursor activity', out);
|
|
}
|
|
};
|
|
});
|
|
|
|
//received cursor blur
|
|
socket.on('cursor blur', function () {
|
|
var notename = getNotenameFromSocket(socket);
|
|
if (!notename || !notes[notename]) return;
|
|
users[socket.id].cursor = null;
|
|
var out = {
|
|
id: socket.id
|
|
};
|
|
for (var i = 0, l = notes[notename].socks.length; i < l; i++) {
|
|
var sock = notes[notename].socks[i];
|
|
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 || !notes[notename]) return;
|
|
var note = notes[notename];
|
|
switch (note.permission) {
|
|
case "freely":
|
|
//not blocking anyone
|
|
break;
|
|
case "editable":
|
|
//only login user can change
|
|
if (!socket.request.user || !socket.request.user.logged_in)
|
|
return;
|
|
break;
|
|
case "locked":
|
|
//only owner can change
|
|
if (note.owner != socket.request.user._id)
|
|
return;
|
|
break;
|
|
}
|
|
op = LZString.decompressFromUTF16(op);
|
|
if (op)
|
|
op = JSON.parse(op);
|
|
else
|
|
return;
|
|
if (config.debug)
|
|
logger.info('SERVER received [' + notename + '] data changed: ' + socket.id + ', op:' + JSON.stringify(op));
|
|
switch (op.origin) {
|
|
case '+input':
|
|
case '+delete':
|
|
case '+transpose':
|
|
case 'paste':
|
|
case 'cut':
|
|
case 'undo':
|
|
case 'redo':
|
|
case 'drag':
|
|
case '*compose':
|
|
case 'case':
|
|
case '+insertLine':
|
|
case '+swapLine':
|
|
case '+joinLines':
|
|
case '+duplicateLine':
|
|
case '+sortLines':
|
|
op.id = socket.id;
|
|
op.otk = note.otk;
|
|
op.nextotk = note.otk = shortId.generate();
|
|
var stringop = JSON.stringify(op);
|
|
var compressstringop = LZString.compressToUTF16(stringop);
|
|
for (var i = 0, l = note.socks.length; i < l; i++) {
|
|
var sock = note.socks[i];
|
|
if (config.debug)
|
|
logger.info('SERVER emit sync data out [' + notename + ']: ' + sock.id + ', op:' + stringop);
|
|
sock.emit('change', compressstringop);
|
|
};
|
|
break;
|
|
default:
|
|
logger.info('SERVER received uncaught [' + notename + '] data changed: ' + socket.id + ', op:' + JSON.stringify(op));
|
|
}
|
|
});
|
|
}
|
|
|
|
module.exports = realtime; |