mirror of
https://github.com/ether/etherpad-lite.git
synced 2025-04-20 15:36:16 -04:00
2e72a1e489
The client might have disconnected between callbacks so don't try to write to the session before checking this. The main callback of this function now has a single check at its top. Removed a redundant check halfway through the callback. Also normalized use of client.id for the session index instead of a mix of client.id and sessionId. Added some explanatory comments.
1459 lines
43 KiB
JavaScript
1459 lines
43 KiB
JavaScript
/**
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* The MessageHandler handles all Messages that comes from Socket.IO and controls the sessions
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*/
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/*
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* Copyright 2009 Google Inc., 2011 Peter 'Pita' Martischka (Primary Technology Ltd)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS-IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var ERR = require("async-stacktrace");
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var async = require("async");
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var padManager = require("../db/PadManager");
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var Changeset = require("ep_etherpad-lite/static/js/Changeset");
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var AttributePool = require("ep_etherpad-lite/static/js/AttributePool");
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var AttributeManager = require("ep_etherpad-lite/static/js/AttributeManager");
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var authorManager = require("../db/AuthorManager");
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var readOnlyManager = require("../db/ReadOnlyManager");
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var settings = require('../utils/Settings');
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var securityManager = require("../db/SecurityManager");
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var plugins = require("ep_etherpad-lite/static/js/pluginfw/plugins.js");
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var log4js = require('log4js');
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var messageLogger = log4js.getLogger("message");
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var _ = require('underscore');
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var hooks = require("ep_etherpad-lite/static/js/pluginfw/hooks.js");
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/**
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* A associative array that saves which sessions belong to a pad
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*/
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var pad2sessions = {};
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/**
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* A associative array that saves informations about a session
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* key = sessionId
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* values = padId, readonlyPadId, readonly, author, rev
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* padId = the real padId of the pad
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* readonlyPadId = The readonly pad id of the pad
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* readonly = Wether the client has only read access (true) or read/write access (false)
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* rev = That last revision that was send to this client
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* author = the author name of this session
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*/
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var sessioninfos = {};
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/**
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* Saves the Socket class we need to send and recieve data from the client
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*/
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var socketio;
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/**
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* This Method is called by server.js to tell the message handler on which socket it should send
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* @param socket_io The Socket
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*/
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exports.setSocketIO = function(socket_io)
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{
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socketio=socket_io;
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}
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/**
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* Handles the connection of a new user
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* @param client the new client
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*/
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exports.handleConnect = function(client)
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{
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//Initalize sessioninfos for this new session
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sessioninfos[client.id]={};
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}
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/**
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* Kicks all sessions from a pad
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* @param client the new client
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*/
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exports.kickSessionsFromPad = function(padID)
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{
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//skip if there is nobody on this pad
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if(!pad2sessions[padID])
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return;
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//disconnect everyone from this pad
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for(var i in pad2sessions[padID])
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{
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socketio.sockets.sockets[pad2sessions[padID][i]].json.send({disconnect:"deleted"});
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}
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}
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/**
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* Handles the disconnection of a user
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* @param client the client that leaves
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*/
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exports.handleDisconnect = function(client)
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{
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//save the padname of this session
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var sessionPad=sessioninfos[client.id].padId;
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//if this connection was already etablished with a handshake, send a disconnect message to the others
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if(sessioninfos[client.id] && sessioninfos[client.id].author)
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{
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var author = sessioninfos[client.id].author;
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//get the author color out of the db
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authorManager.getAuthorColorId(author, function(err, color)
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{
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ERR(err);
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//prepare the notification for the other users on the pad, that this user left
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var messageToTheOtherUsers = {
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"type": "COLLABROOM",
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"data": {
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type: "USER_LEAVE",
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userInfo: {
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"ip": "127.0.0.1",
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"colorId": color,
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"userAgent": "Anonymous",
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"userId": author
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}
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}
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};
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//Go trough all user that are still on the pad, and send them the USER_LEAVE message
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for(i in pad2sessions[sessionPad])
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{
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var socket = socketio.sockets.sockets[pad2sessions[sessionPad][i]];
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if(socket !== undefined){
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socket.json.send(messageToTheOtherUsers);
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}
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}
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});
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}
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//Go trough all sessions of this pad, search and destroy the entry of this client
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for(i in pad2sessions[sessionPad])
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{
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if(pad2sessions[sessionPad][i] == client.id)
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{
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pad2sessions[sessionPad].splice(i, 1);
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break;
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}
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}
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//Delete the sessioninfos entrys of this session
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delete sessioninfos[client.id];
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}
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/**
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* Handles a message from a user
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* @param client the client that send this message
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* @param message the message from the client
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*/
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exports.handleMessage = function(client, message)
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{
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if(message == null)
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{
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messageLogger.warn("Message is null!");
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return;
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}
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if(!message.type)
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{
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messageLogger.warn("Message has no type attribute!");
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return;
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}
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var handleMessageHook = function(callback){
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var dropMessage = false;
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// Call handleMessage hook. If a plugin returns null, the message will be dropped. Note that for all messages
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// handleMessage will be called, even if the client is not authorized
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hooks.aCallAll("handleMessage", { client: client, message: message }, function ( messages ) {
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_.each(messages, function(newMessage){
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if ( newmessage === null ) {
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dropMessage = true;
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}
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});
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// If no plugins explicitly told us to drop the message, its ok to proceed
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if(!dropMessage){ callback() };
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});
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}
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var finalHandler = function () {
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//Check what type of message we get and delegate to the other methodes
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if(message.type == "CLIENT_READY") {
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handleClientReady(client, message);
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} else if(message.type == "CHANGESET_REQ") {
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handleChangesetRequest(client, message);
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} else if(message.type == "COLLABROOM") {
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if (sessioninfos[client.id].readonly) {
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messageLogger.warn("Dropped message, COLLABROOM for readonly pad");
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} else if (message.data.type == "USER_CHANGES") {
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handleUserChanges(client, message);
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} else if (message.data.type == "USERINFO_UPDATE") {
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handleUserInfoUpdate(client, message);
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} else if (message.data.type == "CHAT_MESSAGE") {
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handleChatMessage(client, message);
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} else if (message.data.type == "SAVE_REVISION") {
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handleSaveRevisionMessage(client, message);
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} else if (message.data.type == "CLIENT_MESSAGE" &&
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message.data.payload.type == "suggestUserName") {
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handleSuggestUserName(client, message);
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} else {
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messageLogger.warn("Dropped message, unknown COLLABROOM Data Type " + message.data.type);
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}
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} else {
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messageLogger.warn("Dropped message, unknown Message Type " + message.type);
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}
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};
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if (message) {
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async.series([
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handleMessageHook,
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//check permissions
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function(callback)
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{
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if(!message.padId){
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// If the message has a padId we assume the client is already known to the server and needs no re-authorization
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callback();
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return;
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}
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// Note: message.sessionID is an entirely different kind of
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// session from the sessions we use here! Beware! FIXME: Call
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// our "sessions" "connections".
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// FIXME: Use a hook instead
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// FIXME: Allow to override readwrite access with readonly
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securityManager.checkAccess(message.padId, message.sessionID, message.token, message.password, function(err, statusObject)
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{
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if(ERR(err, callback)) return;
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//access was granted
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if(statusObject.accessStatus == "grant")
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{
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callback();
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}
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//no access, send the client a message that tell him why
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else
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{
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client.json.send({accessStatus: statusObject.accessStatus})
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}
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});
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},
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finalHandler
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]);
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}
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}
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/**
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* Handles a save revision message
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* @param client the client that send this message
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* @param message the message from the client
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*/
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function handleSaveRevisionMessage(client, message){
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var padId = sessioninfos[client.id].padId;
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var userId = sessioninfos[client.id].author;
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padManager.getPad(padId, function(err, pad)
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{
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if(ERR(err)) return;
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pad.addSavedRevision(pad.head, userId);
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});
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}
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/**
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* Handles a custom message (sent via HTTP API request)
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*
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* @param padID {Pad} the pad to which we're sending this message
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* @param msg {String} the message we're sending
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*/
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exports.handleCustomMessage = function (padID, msg, cb) {
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var time = new Date().getTime();
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var msg = {
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type: 'COLLABROOM',
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data: {
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type: msg,
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time: time
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}
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};
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for (var i in pad2sessions[padID]) {
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socketio.sockets.sockets[pad2sessions[padID][i]].json.send(msg);
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}
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cb(null, {});
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}
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/**
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* Handles a Chat Message
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* @param client the client that send this message
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* @param message the message from the client
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*/
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function handleChatMessage(client, message)
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{
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var time = new Date().getTime();
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var userId = sessioninfos[client.id].author;
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var text = message.data.text;
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var padId = sessioninfos[client.id].padId;
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var pad;
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var userName;
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async.series([
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//get the pad
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function(callback)
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{
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padManager.getPad(padId, function(err, _pad)
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{
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if(ERR(err, callback)) return;
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pad = _pad;
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callback();
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});
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},
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function(callback)
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{
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authorManager.getAuthorName(userId, function(err, _userName)
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{
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if(ERR(err, callback)) return;
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userName = _userName;
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callback();
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});
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},
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//save the chat message and broadcast it
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function(callback)
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{
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//save the chat message
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pad.appendChatMessage(text, userId, time);
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var msg = {
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type: "COLLABROOM",
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data: {
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type: "CHAT_MESSAGE",
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userId: userId,
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userName: userName,
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time: time,
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text: text
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}
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};
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//broadcast the chat message to everyone on the pad
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for(var i in pad2sessions[padId])
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{
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socketio.sockets.sockets[pad2sessions[padId][i]].json.send(msg);
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}
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callback();
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}
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], function(err)
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{
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ERR(err);
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});
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}
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/**
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* Handles a handleSuggestUserName, that means a user have suggest a userName for a other user
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* @param client the client that send this message
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* @param message the message from the client
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*/
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function handleSuggestUserName(client, message)
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{
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//check if all ok
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if(message.data.payload.newName == null)
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{
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messageLogger.warn("Dropped message, suggestUserName Message has no newName!");
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return;
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}
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if(message.data.payload.unnamedId == null)
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{
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messageLogger.warn("Dropped message, suggestUserName Message has no unnamedId!");
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return;
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}
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var padId = sessioninfos[client.id].padId;
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//search the author and send him this message
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for(var i in pad2sessions[padId])
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{
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if(sessioninfos[pad2sessions[padId][i]].author == message.data.payload.unnamedId)
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{
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socketio.sockets.sockets[pad2sessions[padId][i]].send(message);
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break;
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}
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}
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}
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/**
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* Handles a USERINFO_UPDATE, that means that a user have changed his color or name. Anyway, we get both informations
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* @param client the client that send this message
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* @param message the message from the client
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*/
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function handleUserInfoUpdate(client, message)
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{
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//check if all ok
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if(message.data.userInfo.colorId == null)
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{
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messageLogger.warn("Dropped message, USERINFO_UPDATE Message has no colorId!");
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return;
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}
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//Find out the author name of this session
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var author = sessioninfos[client.id].author;
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//Tell the authorManager about the new attributes
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authorManager.setAuthorColorId(author, message.data.userInfo.colorId);
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authorManager.setAuthorName(author, message.data.userInfo.name);
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var padId = sessioninfos[client.id].padId;
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//set a null name, when there is no name set. cause the client wants it null
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if(message.data.userInfo.name == null)
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{
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message.data.userInfo.name = null;
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}
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//The Client don't know about a USERINFO_UPDATE, it can handle only new user_newinfo, so change the message type
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message.data.type = "USER_NEWINFO";
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//Send the other clients on the pad the update message
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for(var i in pad2sessions[padId])
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{
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if(pad2sessions[padId][i] != client.id)
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{
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socketio.sockets.sockets[pad2sessions[padId][i]].json.send(message);
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}
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}
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}
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/**
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* Handles a USER_CHANGES message, where the client submits its local
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* edits as a changeset.
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*
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* This handler's job is to update the incoming changeset so that it applies
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* to the latest revision, then add it to the pad, broadcast the changes
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* to all other clients, and send a confirmation to the submitting client.
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*
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* This function is based on a similar one in the original Etherpad.
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* See https://github.com/ether/pad/blob/master/etherpad/src/etherpad/collab/collab_server.js in the function applyUserChanges()
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*
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* @param client the client that send this message
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* @param message the message from the client
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*/
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function handleUserChanges(client, message)
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{
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// Make sure all required fields are present
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if(message.data.baseRev == null)
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{
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messageLogger.warn("Dropped message, USER_CHANGES Message has no baseRev!");
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return;
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}
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if(message.data.apool == null)
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{
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messageLogger.warn("Dropped message, USER_CHANGES Message has no apool!");
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return;
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}
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if(message.data.changeset == null)
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{
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messageLogger.warn("Dropped message, USER_CHANGES Message has no changeset!");
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return;
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}
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//get all Vars we need
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var baseRev = message.data.baseRev;
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var wireApool = (new AttributePool()).fromJsonable(message.data.apool);
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var changeset = message.data.changeset;
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// The client might disconnect between our callbacks. We should still
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// finish processing the changeset, so keep a reference to the session.
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var thisSession = sessioninfos[client.id];
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var r, apool, pad;
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async.series([
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//get the pad
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function(callback)
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{
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padManager.getPad(thisSession.padId, function(err, value)
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{
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if(ERR(err, callback)) return;
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pad = value;
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callback();
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});
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},
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//create the changeset
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function(callback)
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{
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//ex. _checkChangesetAndPool
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try
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{
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// Verify that the changeset has valid syntax and is in canonical form
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Changeset.checkRep(changeset);
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// Verify that the attribute indexes used in the changeset are all
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// defined in the accompanying attribute pool.
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Changeset.eachAttribNumber(changeset, function(n) {
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if (! wireApool.getAttrib(n)) {
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throw "Attribute pool is missing attribute "+n+" for changeset "+changeset;
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}
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});
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}
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catch(e)
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{
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// There is an error in this changeset, so just refuse it
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console.warn("Can't apply USER_CHANGES "+changeset+", because it failed checkRep");
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client.json.send({disconnect:"badChangeset"});
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return;
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}
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//ex. adoptChangesetAttribs
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//Afaik, it copies the new attributes from the changeset, to the global Attribute Pool
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changeset = Changeset.moveOpsToNewPool(changeset, wireApool, pad.pool);
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//ex. applyUserChanges
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apool = pad.pool;
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r = baseRev;
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// The client's changeset might not be based on the latest revision,
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// since other clients are sending changes at the same time.
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// Update the changeset so that it can be applied to the latest revision.
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//https://github.com/caolan/async#whilst
|
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async.whilst(
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function() { return r < pad.getHeadRevisionNumber(); },
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function(callback)
|
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{
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r++;
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pad.getRevisionChangeset(r, function(err, c)
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{
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if(ERR(err, callback)) return;
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|
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// At this point, both "c" (from the pad) and "changeset" (from the
|
|
// client) are relative to revision r - 1. The follow function
|
|
// rebases "changeset" so that it is relative to revision r
|
|
// and can be applied after "c".
|
|
changeset = Changeset.follow(c, changeset, false, apool);
|
|
|
|
if ((r - baseRev) % 200 == 0) { // don't let the stack get too deep
|
|
async.nextTick(callback);
|
|
} else {
|
|
callback(null);
|
|
}
|
|
});
|
|
},
|
|
//use the callback of the series function
|
|
callback
|
|
);
|
|
},
|
|
//do correction changesets, and send it to all users
|
|
function (callback)
|
|
{
|
|
var prevText = pad.text();
|
|
|
|
if (Changeset.oldLen(changeset) != prevText.length)
|
|
{
|
|
console.warn("Can't apply USER_CHANGES "+changeset+" with oldLen " + Changeset.oldLen(changeset) + " to document of length " + prevText.length);
|
|
client.json.send({disconnect:"badChangeset"});
|
|
callback();
|
|
return;
|
|
}
|
|
|
|
pad.appendRevision(changeset, thisSession.author);
|
|
|
|
var correctionChangeset = _correctMarkersInPad(pad.atext, pad.pool);
|
|
if (correctionChangeset) {
|
|
pad.appendRevision(correctionChangeset);
|
|
}
|
|
|
|
// Make sure the pad always ends with an empty line.
|
|
if (pad.text().lastIndexOf("\n\n") != pad.text().length-2) {
|
|
var nlChangeset = Changeset.makeSplice(pad.text(), pad.text().length-1, 0, "\n");
|
|
pad.appendRevision(nlChangeset);
|
|
}
|
|
|
|
exports.updatePadClients(pad, callback);
|
|
}
|
|
], function(err)
|
|
{
|
|
ERR(err);
|
|
});
|
|
}
|
|
|
|
exports.updatePadClients = function(pad, callback)
|
|
{
|
|
//skip this step if noone is on this pad
|
|
if(!pad2sessions[pad.id])
|
|
{
|
|
callback();
|
|
return;
|
|
}
|
|
|
|
//go trough all sessions on this pad
|
|
async.forEach(pad2sessions[pad.id], function(session, callback)
|
|
{
|
|
|
|
//https://github.com/caolan/async#whilst
|
|
//send them all new changesets
|
|
async.whilst(
|
|
function (){ return sessioninfos[session].rev < pad.getHeadRevisionNumber()},
|
|
function(callback)
|
|
{
|
|
var author, revChangeset, currentTime;
|
|
var r = sessioninfos[session].rev + 1;
|
|
|
|
async.parallel([
|
|
function (callback)
|
|
{
|
|
pad.getRevisionAuthor(r, function(err, value)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
author = value;
|
|
callback();
|
|
});
|
|
},
|
|
function (callback)
|
|
{
|
|
pad.getRevisionChangeset(r, function(err, value)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
revChangeset = value;
|
|
callback();
|
|
});
|
|
},
|
|
function (callback)
|
|
{
|
|
pad.getRevisionDate(r, function(err, date)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
currentTime = date;
|
|
callback();
|
|
});
|
|
}
|
|
], function(err)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
// next if session has not been deleted
|
|
if(sessioninfos[session] == null)
|
|
{
|
|
callback(null);
|
|
return;
|
|
}
|
|
if(author == sessioninfos[session].author)
|
|
{
|
|
socketio.sockets.sockets[session].json.send({"type":"COLLABROOM","data":{type:"ACCEPT_COMMIT", newRev:r}});
|
|
}
|
|
else
|
|
{
|
|
var forWire = Changeset.prepareForWire(revChangeset, pad.pool);
|
|
var wireMsg = {"type":"COLLABROOM",
|
|
"data":{type:"NEW_CHANGES",
|
|
newRev:r,
|
|
changeset: forWire.translated,
|
|
apool: forWire.pool,
|
|
author: author,
|
|
currentTime: currentTime,
|
|
timeDelta: currentTime - sessioninfos[session].time
|
|
}};
|
|
|
|
socketio.sockets.sockets[session].json.send(wireMsg);
|
|
}
|
|
|
|
if(sessioninfos[session] != null)
|
|
{
|
|
sessioninfos[session].time = currentTime;
|
|
sessioninfos[session].rev = r;
|
|
}
|
|
|
|
callback(null);
|
|
});
|
|
},
|
|
callback
|
|
);
|
|
},callback);
|
|
}
|
|
|
|
/**
|
|
* Copied from the Etherpad Source Code. Don't know what this methode does excatly...
|
|
*/
|
|
function _correctMarkersInPad(atext, apool) {
|
|
var text = atext.text;
|
|
|
|
// collect char positions of line markers (e.g. bullets) in new atext
|
|
// that aren't at the start of a line
|
|
var badMarkers = [];
|
|
var iter = Changeset.opIterator(atext.attribs);
|
|
var offset = 0;
|
|
while (iter.hasNext()) {
|
|
var op = iter.next();
|
|
|
|
var hasMarker = _.find(AttributeManager.lineAttributes, function(attribute){
|
|
return Changeset.opAttributeValue(op, attribute, apool);
|
|
}) !== undefined;
|
|
|
|
if (hasMarker) {
|
|
for(var i=0;i<op.chars;i++) {
|
|
if (offset > 0 && text.charAt(offset-1) != '\n') {
|
|
badMarkers.push(offset);
|
|
}
|
|
offset++;
|
|
}
|
|
}
|
|
else {
|
|
offset += op.chars;
|
|
}
|
|
}
|
|
|
|
if (badMarkers.length == 0) {
|
|
return null;
|
|
}
|
|
|
|
// create changeset that removes these bad markers
|
|
offset = 0;
|
|
var builder = Changeset.builder(text.length);
|
|
badMarkers.forEach(function(pos) {
|
|
builder.keepText(text.substring(offset, pos));
|
|
builder.remove(1);
|
|
offset = pos+1;
|
|
});
|
|
return builder.toString();
|
|
}
|
|
|
|
/**
|
|
* Handles a CLIENT_READY. A CLIENT_READY is the first message from the client to the server. The Client sends his token
|
|
* and the pad it wants to enter. The Server answers with the inital values (clientVars) of the pad
|
|
* @param client the client that send this message
|
|
* @param message the message from the client
|
|
*/
|
|
function handleClientReady(client, message)
|
|
{
|
|
//check if all ok
|
|
if(!message.token)
|
|
{
|
|
messageLogger.warn("Dropped message, CLIENT_READY Message has no token!");
|
|
return;
|
|
}
|
|
if(!message.padId)
|
|
{
|
|
messageLogger.warn("Dropped message, CLIENT_READY Message has no padId!");
|
|
return;
|
|
}
|
|
if(!message.protocolVersion)
|
|
{
|
|
messageLogger.warn("Dropped message, CLIENT_READY Message has no protocolVersion!");
|
|
return;
|
|
}
|
|
if(message.protocolVersion != 2)
|
|
{
|
|
messageLogger.warn("Dropped message, CLIENT_READY Message has a unknown protocolVersion '" + message.protocolVersion + "'!");
|
|
return;
|
|
}
|
|
|
|
var author;
|
|
var authorName;
|
|
var authorColorId;
|
|
var pad;
|
|
var historicalAuthorData = {};
|
|
var currentTime;
|
|
var chatMessages;
|
|
var padIds;
|
|
|
|
async.series([
|
|
// Get ro/rw id:s
|
|
function (callback) {
|
|
readOnlyManager.getIds(message.padId, function(err, value) {
|
|
if(ERR(err, callback)) return;
|
|
padIds = value;
|
|
callback();
|
|
});
|
|
},
|
|
|
|
//check permissions
|
|
function(callback)
|
|
{
|
|
// Note: message.sessionID is an entierly different kind of
|
|
// session from the sessions we use here! Beware! FIXME: Call
|
|
// our "sessions" "connections".
|
|
// FIXME: Use a hook instead
|
|
// FIXME: Allow to override readwrite access with readonly
|
|
securityManager.checkAccess (padIds.padId, message.sessionID, message.token, message.password, function(err, statusObject)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
|
|
//access was granted
|
|
if(statusObject.accessStatus == "grant")
|
|
{
|
|
author = statusObject.authorID;
|
|
callback();
|
|
}
|
|
//no access, send the client a message that tell him why
|
|
else
|
|
{
|
|
client.json.send({accessStatus: statusObject.accessStatus})
|
|
}
|
|
});
|
|
},
|
|
//get all authordata of this new user
|
|
function(callback)
|
|
{
|
|
async.parallel([
|
|
//get colorId
|
|
function(callback)
|
|
{
|
|
authorManager.getAuthorColorId(author, function(err, value)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
authorColorId = value;
|
|
callback();
|
|
});
|
|
},
|
|
//get author name
|
|
function(callback)
|
|
{
|
|
authorManager.getAuthorName(author, function(err, value)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
authorName = value;
|
|
callback();
|
|
});
|
|
},
|
|
function(callback)
|
|
{
|
|
padManager.getPad(padIds.padId, function(err, value)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
pad = value;
|
|
callback();
|
|
});
|
|
}
|
|
], callback);
|
|
},
|
|
//these db requests all need the pad object
|
|
function(callback)
|
|
{
|
|
var authors = pad.getAllAuthors();
|
|
|
|
async.parallel([
|
|
//get timestamp of latest revission needed for timeslider
|
|
function(callback)
|
|
{
|
|
pad.getRevisionDate(pad.getHeadRevisionNumber(), function(err, date)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
currentTime = date;
|
|
callback();
|
|
});
|
|
},
|
|
//get all author data out of the database
|
|
function(callback)
|
|
{
|
|
async.forEach(authors, function(authorId, callback)
|
|
{
|
|
authorManager.getAuthor(authorId, function(err, author)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
delete author.timestamp;
|
|
historicalAuthorData[authorId] = author;
|
|
callback();
|
|
});
|
|
}, callback);
|
|
},
|
|
//get the latest chat messages
|
|
function(callback)
|
|
{
|
|
pad.getLastChatMessages(100, function(err, _chatMessages)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
chatMessages = _chatMessages;
|
|
callback();
|
|
});
|
|
}
|
|
], callback);
|
|
|
|
},
|
|
function(callback)
|
|
{
|
|
//Check that the client is still here. It might have disconnected between callbacks.
|
|
if(sessioninfos[client.id] === undefined)
|
|
{
|
|
callback();
|
|
return;
|
|
}
|
|
|
|
//Check if this author is already on the pad, if yes, kick the other sessions!
|
|
if(pad2sessions[padIds.padId])
|
|
{
|
|
for(var i in pad2sessions[padIds.padId])
|
|
{
|
|
if(sessioninfos[pad2sessions[padIds.padId][i]] && sessioninfos[pad2sessions[padIds.padId][i]].author == author)
|
|
{
|
|
var socket = socketio.sockets.sockets[pad2sessions[padIds.padId][i]];
|
|
if(socket) socket.json.send({disconnect:"userdup"});
|
|
}
|
|
}
|
|
}
|
|
|
|
//Save in sessioninfos that this session belonges to this pad
|
|
sessioninfos[client.id].padId = padIds.padId;
|
|
sessioninfos[client.id].readOnlyPadId = padIds.readOnlyPadId;
|
|
sessioninfos[client.id].readonly = padIds.readonly;
|
|
|
|
//check if there is already a pad2sessions entry, if not, create one
|
|
if(!pad2sessions[padIds.padId])
|
|
{
|
|
pad2sessions[padIds.padId] = [];
|
|
}
|
|
|
|
//Saves in pad2sessions that this session belongs to this pad
|
|
pad2sessions[padIds.padId].push(client.id);
|
|
|
|
//prepare all values for the wire
|
|
var atext = Changeset.cloneAText(pad.atext);
|
|
var attribsForWire = Changeset.prepareForWire(atext.attribs, pad.pool);
|
|
var apool = attribsForWire.pool.toJsonable();
|
|
atext.attribs = attribsForWire.translated;
|
|
|
|
// Warning: never ever send padIds.padId to the client. If the
|
|
// client is read only you would open a security hole 1 swedish
|
|
// mile wide...
|
|
var clientVars = {
|
|
"accountPrivs": {
|
|
"maxRevisions": 100
|
|
},
|
|
"initialRevisionList": [],
|
|
"initialOptions": {
|
|
"guestPolicy": "deny"
|
|
},
|
|
"savedRevisions": pad.getSavedRevisions(),
|
|
"collab_client_vars": {
|
|
"initialAttributedText": atext,
|
|
"clientIp": "127.0.0.1",
|
|
//"clientAgent": "Anonymous Agent",
|
|
"padId": message.padId,
|
|
"historicalAuthorData": historicalAuthorData,
|
|
"apool": apool,
|
|
"rev": pad.getHeadRevisionNumber(),
|
|
"globalPadId": message.padId,
|
|
"time": currentTime,
|
|
},
|
|
"colorPalette": ["#ffc7c7", "#fff1c7", "#e3ffc7", "#c7ffd5", "#c7ffff", "#c7d5ff", "#e3c7ff", "#ffc7f1", "#ff8f8f", "#ffe38f", "#c7ff8f", "#8fffab", "#8fffff", "#8fabff", "#c78fff", "#ff8fe3", "#d97979", "#d9c179", "#a9d979", "#79d991", "#79d9d9", "#7991d9", "#a979d9", "#d979c1", "#d9a9a9", "#d9cda9", "#c1d9a9", "#a9d9b5", "#a9d9d9", "#a9b5d9", "#c1a9d9", "#d9a9cd", "#4c9c82", "#12d1ad", "#2d8e80", "#7485c3", "#a091c7", "#3185ab", "#6818b4", "#e6e76d", "#a42c64", "#f386e5", "#4ecc0c", "#c0c236", "#693224", "#b5de6a", "#9b88fd", "#358f9b", "#496d2f", "#e267fe", "#d23056", "#1a1a64", "#5aa335", "#d722bb", "#86dc6c", "#b5a714", "#955b6a", "#9f2985", "#4b81c8", "#3d6a5b", "#434e16", "#d16084", "#af6a0e", "#8c8bd8"],
|
|
"clientIp": "127.0.0.1",
|
|
"userIsGuest": true,
|
|
"userColor": authorColorId,
|
|
"padId": message.padId,
|
|
"initialTitle": "Pad: " + message.padId,
|
|
"opts": {},
|
|
"chatHistory": chatMessages,
|
|
"numConnectedUsers": pad2sessions[padIds.padId].length,
|
|
"isProPad": false,
|
|
"readOnlyId": padIds.readOnlyPadId,
|
|
"readonly": padIds.readonly,
|
|
"serverTimestamp": new Date().getTime(),
|
|
"globalPadId": message.padId,
|
|
"userId": author,
|
|
"cookiePrefsToSet": {
|
|
"fullWidth": false,
|
|
"hideSidebar": false
|
|
},
|
|
"abiwordAvailable": settings.abiwordAvailable(),
|
|
"plugins": {
|
|
"plugins": plugins.plugins,
|
|
"parts": plugins.parts,
|
|
},
|
|
"initialChangesets": [] // FIXME: REMOVE THIS SHIT
|
|
|
|
}
|
|
|
|
//Add a username to the clientVars if one avaiable
|
|
if(authorName != null)
|
|
{
|
|
clientVars.userName = authorName;
|
|
}
|
|
|
|
//If this is a reconnect, we don't have to send the client the ClientVars again
|
|
if(message.reconnect == true)
|
|
{
|
|
//Save the revision in sessioninfos, we take the revision from the info the client send to us
|
|
sessioninfos[client.id].rev = message.client_rev;
|
|
}
|
|
//This is a normal first connect
|
|
else
|
|
{
|
|
//Send the clientVars to the Client
|
|
client.json.send({type: "CLIENT_VARS", data: clientVars});
|
|
//Save the current revision in sessioninfos, should be the same as in clientVars
|
|
sessioninfos[client.id].rev = pad.getHeadRevisionNumber();
|
|
}
|
|
|
|
sessioninfos[client.id].author = author;
|
|
|
|
//prepare the notification for the other users on the pad, that this user joined
|
|
var messageToTheOtherUsers = {
|
|
"type": "COLLABROOM",
|
|
"data": {
|
|
type: "USER_NEWINFO",
|
|
userInfo: {
|
|
"ip": "127.0.0.1",
|
|
"colorId": authorColorId,
|
|
"userAgent": "Anonymous",
|
|
"userId": author
|
|
}
|
|
}
|
|
};
|
|
|
|
//Add the authorname of this new User, if avaiable
|
|
if(authorName != null)
|
|
{
|
|
messageToTheOtherUsers.data.userInfo.name = authorName;
|
|
}
|
|
|
|
//Run trough all sessions of this pad
|
|
async.forEach(pad2sessions[padIds.padId], function(sessionID, callback)
|
|
{
|
|
var author, socket, sessionAuthorName, sessionAuthorColorId;
|
|
|
|
//Since sessioninfos might change while being enumerated, check if the
|
|
//sessionID is still assigned to a valid session
|
|
if(sessioninfos[sessionID] !== undefined &&
|
|
socketio.sockets.sockets[sessionID] !== undefined){
|
|
author = sessioninfos[sessionID].author;
|
|
socket = socketio.sockets.sockets[sessionID];
|
|
}else {
|
|
// If the sessionID is not valid, callback();
|
|
callback();
|
|
return;
|
|
}
|
|
async.series([
|
|
//get the authorname & colorId
|
|
function(callback)
|
|
{
|
|
async.parallel([
|
|
function(callback)
|
|
{
|
|
authorManager.getAuthorColorId(author, function(err, value)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
sessionAuthorColorId = value;
|
|
callback();
|
|
})
|
|
},
|
|
function(callback)
|
|
{
|
|
authorManager.getAuthorName(author, function(err, value)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
sessionAuthorName = value;
|
|
callback();
|
|
})
|
|
}
|
|
],callback);
|
|
},
|
|
function (callback)
|
|
{
|
|
//Jump over, if this session is the connection session
|
|
if(sessionID != client.id)
|
|
{
|
|
//Send this Session the Notification about the new user
|
|
socket.json.send(messageToTheOtherUsers);
|
|
|
|
//Send the new User a Notification about this other user
|
|
var messageToNotifyTheClientAboutTheOthers = {
|
|
"type": "COLLABROOM",
|
|
"data": {
|
|
type: "USER_NEWINFO",
|
|
userInfo: {
|
|
"ip": "127.0.0.1",
|
|
"colorId": sessionAuthorColorId,
|
|
"name": sessionAuthorName,
|
|
"userAgent": "Anonymous",
|
|
"userId": author
|
|
}
|
|
}
|
|
};
|
|
client.json.send(messageToNotifyTheClientAboutTheOthers);
|
|
}
|
|
}
|
|
], callback);
|
|
}, callback);
|
|
}
|
|
],function(err)
|
|
{
|
|
ERR(err);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Handles a request for a rough changeset, the timeslider client needs it
|
|
*/
|
|
function handleChangesetRequest(client, message)
|
|
{
|
|
//check if all ok
|
|
if(message.data == null)
|
|
{
|
|
messageLogger.warn("Dropped message, changeset request has no data!");
|
|
return;
|
|
}
|
|
if(message.padId == null)
|
|
{
|
|
messageLogger.warn("Dropped message, changeset request has no padId!");
|
|
return;
|
|
}
|
|
if(message.data.granularity == null)
|
|
{
|
|
messageLogger.warn("Dropped message, changeset request has no granularity!");
|
|
return;
|
|
}
|
|
if(message.data.start == null)
|
|
{
|
|
messageLogger.warn("Dropped message, changeset request has no start!");
|
|
return;
|
|
}
|
|
if(message.data.requestID == null)
|
|
{
|
|
messageLogger.warn("Dropped message, changeset request has no requestID!");
|
|
return;
|
|
}
|
|
|
|
var granularity = message.data.granularity;
|
|
var start = message.data.start;
|
|
var end = start + (100 * granularity);
|
|
var padIds;
|
|
|
|
async.series([
|
|
function (callback) {
|
|
readOnlyManager.getIds(message.padId, function(err, value) {
|
|
if(ERR(err, callback)) return;
|
|
padIds = value;
|
|
callback();
|
|
});
|
|
},
|
|
function (callback) {
|
|
//build the requested rough changesets and send them back
|
|
getChangesetInfo(padIds.padId, start, end, granularity, function(err, changesetInfo)
|
|
{
|
|
ERR(err);
|
|
|
|
var data = changesetInfo;
|
|
data.requestID = message.data.requestID;
|
|
|
|
client.json.send({type: "CHANGESET_REQ", data: data});
|
|
});
|
|
}
|
|
]);
|
|
}
|
|
|
|
|
|
/**
|
|
* Tries to rebuild the getChangestInfo function of the original Etherpad
|
|
* https://github.com/ether/pad/blob/master/etherpad/src/etherpad/control/pad/pad_changeset_control.js#L144
|
|
*/
|
|
function getChangesetInfo(padId, startNum, endNum, granularity, callback)
|
|
{
|
|
var forwardsChangesets = [];
|
|
var backwardsChangesets = [];
|
|
var timeDeltas = [];
|
|
var apool = new AttributePool();
|
|
var pad;
|
|
var composedChangesets = {};
|
|
var revisionDate = [];
|
|
var lines;
|
|
|
|
async.series([
|
|
//get the pad from the database
|
|
function(callback)
|
|
{
|
|
padManager.getPad(padId, function(err, _pad)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
pad = _pad;
|
|
callback();
|
|
});
|
|
},
|
|
function(callback)
|
|
{
|
|
//calculate the last full endnum
|
|
var lastRev = pad.getHeadRevisionNumber();
|
|
if (endNum > lastRev+1) {
|
|
endNum = lastRev+1;
|
|
}
|
|
endNum = Math.floor(endNum / granularity)*granularity;
|
|
|
|
var compositesChangesetNeeded = [];
|
|
var revTimesNeeded = [];
|
|
|
|
//figure out which composite Changeset and revTimes we need, to load them in bulk
|
|
var compositeStart = startNum;
|
|
while (compositeStart < endNum)
|
|
{
|
|
var compositeEnd = compositeStart + granularity;
|
|
|
|
//add the composite Changeset we needed
|
|
compositesChangesetNeeded.push({start: compositeStart, end: compositeEnd});
|
|
|
|
//add the t1 time we need
|
|
revTimesNeeded.push(compositeStart == 0 ? 0 : compositeStart - 1);
|
|
//add the t2 time we need
|
|
revTimesNeeded.push(compositeEnd - 1);
|
|
|
|
compositeStart += granularity;
|
|
}
|
|
|
|
//get all needed db values parallel
|
|
async.parallel([
|
|
function(callback)
|
|
{
|
|
//get all needed composite Changesets
|
|
async.forEach(compositesChangesetNeeded, function(item, callback)
|
|
{
|
|
composePadChangesets(padId, item.start, item.end, function(err, changeset)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
composedChangesets[item.start + "/" + item.end] = changeset;
|
|
callback();
|
|
});
|
|
}, callback);
|
|
},
|
|
function(callback)
|
|
{
|
|
//get all needed revision Dates
|
|
async.forEach(revTimesNeeded, function(revNum, callback)
|
|
{
|
|
pad.getRevisionDate(revNum, function(err, revDate)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
revisionDate[revNum] = Math.floor(revDate/1000);
|
|
callback();
|
|
});
|
|
}, callback);
|
|
},
|
|
//get the lines
|
|
function(callback)
|
|
{
|
|
getPadLines(padId, startNum-1, function(err, _lines)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
lines = _lines;
|
|
callback();
|
|
});
|
|
}
|
|
], callback);
|
|
},
|
|
//doesn't know what happens here excatly :/
|
|
function(callback)
|
|
{
|
|
var compositeStart = startNum;
|
|
|
|
while (compositeStart < endNum)
|
|
{
|
|
if (compositeStart + granularity > endNum)
|
|
{
|
|
break;
|
|
}
|
|
|
|
var compositeEnd = compositeStart + granularity;
|
|
|
|
var forwards = composedChangesets[compositeStart + "/" + compositeEnd];
|
|
var backwards = Changeset.inverse(forwards, lines.textlines, lines.alines, pad.apool());
|
|
|
|
Changeset.mutateAttributionLines(forwards, lines.alines, pad.apool());
|
|
Changeset.mutateTextLines(forwards, lines.textlines);
|
|
|
|
var forwards2 = Changeset.moveOpsToNewPool(forwards, pad.apool(), apool);
|
|
var backwards2 = Changeset.moveOpsToNewPool(backwards, pad.apool(), apool);
|
|
|
|
var t1, t2;
|
|
if (compositeStart == 0)
|
|
{
|
|
t1 = revisionDate[0];
|
|
}
|
|
else
|
|
{
|
|
t1 = revisionDate[compositeStart - 1];
|
|
}
|
|
|
|
t2 = revisionDate[compositeEnd - 1];
|
|
|
|
timeDeltas.push(t2 - t1);
|
|
forwardsChangesets.push(forwards2);
|
|
backwardsChangesets.push(backwards2);
|
|
|
|
compositeStart += granularity;
|
|
}
|
|
|
|
callback();
|
|
}
|
|
], function(err)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
|
|
callback(null, {forwardsChangesets: forwardsChangesets,
|
|
backwardsChangesets: backwardsChangesets,
|
|
apool: apool.toJsonable(),
|
|
actualEndNum: endNum,
|
|
timeDeltas: timeDeltas,
|
|
start: startNum,
|
|
granularity: granularity });
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Tries to rebuild the getPadLines function of the original Etherpad
|
|
* https://github.com/ether/pad/blob/master/etherpad/src/etherpad/control/pad/pad_changeset_control.js#L263
|
|
*/
|
|
function getPadLines(padId, revNum, callback)
|
|
{
|
|
var atext;
|
|
var result = {};
|
|
var pad;
|
|
|
|
async.series([
|
|
//get the pad from the database
|
|
function(callback)
|
|
{
|
|
padManager.getPad(padId, function(err, _pad)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
pad = _pad;
|
|
callback();
|
|
});
|
|
},
|
|
//get the atext
|
|
function(callback)
|
|
{
|
|
if(revNum >= 0)
|
|
{
|
|
pad.getInternalRevisionAText(revNum, function(err, _atext)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
atext = _atext;
|
|
callback();
|
|
});
|
|
}
|
|
else
|
|
{
|
|
atext = Changeset.makeAText("\n");
|
|
callback(null);
|
|
}
|
|
},
|
|
function(callback)
|
|
{
|
|
result.textlines = Changeset.splitTextLines(atext.text);
|
|
result.alines = Changeset.splitAttributionLines(atext.attribs, atext.text);
|
|
callback(null);
|
|
}
|
|
], function(err)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
callback(null, result);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Tries to rebuild the composePadChangeset function of the original Etherpad
|
|
* https://github.com/ether/pad/blob/master/etherpad/src/etherpad/control/pad/pad_changeset_control.js#L241
|
|
*/
|
|
function composePadChangesets(padId, startNum, endNum, callback)
|
|
{
|
|
var pad;
|
|
var changesets = [];
|
|
var changeset;
|
|
|
|
async.series([
|
|
//get the pad from the database
|
|
function(callback)
|
|
{
|
|
padManager.getPad(padId, function(err, _pad)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
pad = _pad;
|
|
callback();
|
|
});
|
|
},
|
|
//fetch all changesets we need
|
|
function(callback)
|
|
{
|
|
var changesetsNeeded=[];
|
|
|
|
//create a array for all changesets, we will
|
|
//replace the values with the changeset later
|
|
for(var r=startNum;r<endNum;r++)
|
|
{
|
|
changesetsNeeded.push(r);
|
|
}
|
|
|
|
//get all changesets
|
|
async.forEach(changesetsNeeded, function(revNum,callback)
|
|
{
|
|
pad.getRevisionChangeset(revNum, function(err, value)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
changesets[revNum] = value;
|
|
callback();
|
|
});
|
|
},callback);
|
|
},
|
|
//compose Changesets
|
|
function(callback)
|
|
{
|
|
changeset = changesets[startNum];
|
|
var pool = pad.apool();
|
|
|
|
for(var r=startNum+1;r<endNum;r++)
|
|
{
|
|
var cs = changesets[r];
|
|
changeset = Changeset.compose(changeset, cs, pool);
|
|
}
|
|
|
|
callback(null);
|
|
}
|
|
],
|
|
//return err and changeset
|
|
function(err)
|
|
{
|
|
if(ERR(err, callback)) return;
|
|
callback(null, changeset);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Get the number of users in a pad
|
|
*/
|
|
exports.padUsersCount = function (padID, callback) {
|
|
if (!pad2sessions[padID] || typeof pad2sessions[padID] != typeof []) {
|
|
callback(null, {padUsersCount: 0});
|
|
} else {
|
|
callback(null, {padUsersCount: pad2sessions[padID].length});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the list of users in a pad
|
|
*/
|
|
exports.padUsers = function (padID, callback) {
|
|
if (!pad2sessions[padID] || typeof pad2sessions[padID] != typeof []) {
|
|
callback(null, {padUsers: []});
|
|
} else {
|
|
var authors = [];
|
|
for ( var ix in sessioninfos ) {
|
|
if ( sessioninfos[ix].padId !== padID ) {
|
|
continue;
|
|
}
|
|
var aid = sessioninfos[ix].author;
|
|
authorManager.getAuthor( aid, function ( err, author ) {
|
|
authors.push( author );
|
|
if ( authors.length === pad2sessions[padID].length ) {
|
|
callback(null, {padUsers: authors});
|
|
}
|
|
} );
|
|
}
|
|
}
|
|
}
|