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674 lines
23 KiB
JavaScript
674 lines
23 KiB
JavaScript
// TODO: This file was created by bulk-decaffeinate.
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// Fix any style issues and re-enable lint.
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/*
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* decaffeinate suggestions:
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* DS102: Remove unnecessary code created because of implicit returns
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* DS206: Consider reworking classes to avoid initClass
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* DS207: Consider shorter variations of null checks
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* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
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*/
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/* global io */
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import SocketIoShim from './SocketIoShim'
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let ConnectionManager
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const ONEHOUR = 1000 * 60 * 60
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export default ConnectionManager = (function() {
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ConnectionManager = class ConnectionManager {
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static initClass() {
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this.prototype.disconnectAfterMs = ONEHOUR * 24
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this.prototype.lastUserAction = new Date()
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this.prototype.MIN_RETRY_INTERVAL = 1000 // ms, rate limit on reconnects for user clicking "try now"
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this.prototype.BACKGROUND_RETRY_INTERVAL = 5 * 1000
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this.prototype.JOIN_PROJECT_RETRY_INTERVAL = 5000
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this.prototype.JOIN_PROJECT_MAX_RETRY_INTERVAL = 60000
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this.prototype.RECONNECT_GRACEFULLY_RETRY_INTERVAL = 5000 // ms
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this.prototype.MAX_RECONNECT_GRACEFULLY_INTERVAL = 45 * 1000
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}
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constructor(ide, $scope) {
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this.ide = ide
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this.$scope = $scope
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this.wsUrl = ide.wsUrl || null // websocket url (if defined)
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if (typeof io === 'undefined' || io === null) {
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if (this.wsUrl && !window.location.href.match(/ws=fallback/)) {
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// if we tried to boot from a custom real-time backend and failed,
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// try reloading and falling back to the siteUrl
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window.location = window.location.href + '?ws=fallback'
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}
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console.error(
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'Socket.io javascript not loaded. Please check that the real-time service is running and accessible.'
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)
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this.ide.socket = SocketIoShim.stub()
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this.$scope.$apply(() => {
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return (this.$scope.state.error =
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'Could not connect to websocket server :(')
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})
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return
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}
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setInterval(() => {
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return this.disconnectIfInactive()
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}, ONEHOUR)
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// trigger a reconnect immediately if network comes back online
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window.addEventListener('online', () => {
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sl_console.log('[online] browser notified online')
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if (!this.connected) {
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return this.tryReconnectWithRateLimit({ force: true })
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}
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})
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this.userIsLeavingPage = false
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window.addEventListener('beforeunload', () => {
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this.userIsLeavingPage = true
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}) // Don't return true or it will show a pop up
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this.connected = false
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this.userIsInactive = false
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this.gracefullyReconnecting = false
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this.shuttingDown = false
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this.joinProjectRetryInterval = this.JOIN_PROJECT_RETRY_INTERVAL
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this.$scope.connection = {
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debug: sl_debugging,
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reconnecting: false,
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stillReconnecting: false,
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// If we need to force everyone to reload the editor
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forced_disconnect: false,
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inactive_disconnect: false,
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jobId: 0
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}
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this.$scope.tryReconnectNow = () => {
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// user manually requested reconnection via "Try now" button
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return this.tryReconnectWithRateLimit({ force: true })
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}
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this.$scope.$on('cursor:editor:update', () => {
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this.lastUserAction = new Date() // time of last edit
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if (!this.connected) {
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// user is editing, try to reconnect
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return this.tryReconnectWithRateLimit()
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}
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})
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document.querySelector('body').addEventListener('click', e => {
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if (
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!this.shuttingDown &&
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!this.connected &&
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e.target.id !== 'try-reconnect-now-button'
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) {
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// user is editing, try to reconnect
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return this.tryReconnectWithRateLimit()
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}
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})
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// initial connection attempt
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this.updateConnectionManagerState('connecting')
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let parsedURL
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try {
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parsedURL = new URL(this.wsUrl || '/socket.io', window.location)
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} catch (e) {
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// hello IE11
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if (
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this.wsUrl &&
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this.wsUrl.indexOf('/') !== 0 &&
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!window.location.href.match(/ws=fallback/)
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) {
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// do not even try parsing the wsUrl, use the fallback
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window.location = window.location.href + '?ws=fallback'
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}
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parsedURL = {
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origin: null,
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pathname: this.wsUrl || '/socket.io'
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}
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}
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this.ide.socket = SocketIoShim.connect(parsedURL.origin, {
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resource: parsedURL.pathname.slice(1),
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reconnect: false,
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'connect timeout': 30 * 1000,
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'force new connection': true
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})
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// handle network-level websocket errors (e.g. failed dns lookups)
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let connectionAttempt = 1
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let connectionErrorHandler = err => {
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if (
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window.wsRetryHandshake &&
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connectionAttempt++ < window.wsRetryHandshake
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) {
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return setTimeout(() => this.ide.socket.socket.connect(), 100)
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}
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this.updateConnectionManagerState('error')
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sl_console.log('socket.io error', err)
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if (this.wsUrl && !window.location.href.match(/ws=fallback/)) {
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// if we tried to load a custom websocket location and failed
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// try reloading and falling back to the siteUrl
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window.location = window.location.href + '?ws=fallback'
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} else {
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this.connected = false
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return this.$scope.$apply(() => {
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return (this.$scope.state.error =
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"Unable to connect, please view the <u><a href='/learn/Kb/Connection_problems'>connection problems guide</a></u> to fix the issue.")
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})
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}
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}
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this.ide.socket.on('error', connectionErrorHandler)
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// The "connect" event is the first event we get back. It only
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// indicates that the websocket is connected, we still need to
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// pass authentication to join a project.
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this.ide.socket.on('connect', () => {
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// state should be 'connecting'...
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// remove connection error handler when connected, avoid unwanted fallbacks
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this.ide.socket.removeListener('error', connectionErrorHandler)
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sl_console.log('[socket.io connect] Connected')
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this.updateConnectionManagerState('authenticating')
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})
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// The next event we should get is an authentication response
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// from the server, either "connectionAccepted" or
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// "connectionRejected".
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this.ide.socket.on('connectionAccepted', (_, publicId) => {
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this.ide.socket.publicId = publicId || this.ide.socket.socket.sessionid
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// state should be 'authenticating'...
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sl_console.log('[socket.io connectionAccepted] allowed to connect')
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this.connected = true
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this.gracefullyReconnecting = false
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this.ide.pushEvent('connected')
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this.updateConnectionManagerState('joining')
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this.$scope.$apply(() => {
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if (this.$scope.state.loading) {
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this.$scope.state.load_progress = 70
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}
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})
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// we have passed authentication so we can now join the project
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let connectionJobId = this.$scope.connection.jobId
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setTimeout(() => {
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this.joinProject(connectionJobId)
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}, 100)
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})
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this.ide.socket.on('connectionRejected', err => {
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// state should be 'authenticating'...
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sl_console.log(
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'[socket.io connectionRejected] session not valid or other connection error'
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)
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// real time sends a 'retry' message if the process was shutting down
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if (err && err.message === 'retry') {
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return this.tryReconnectWithRateLimit()
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}
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// we have failed authentication, usually due to an invalid session cookie
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return this.reportConnectionError(err)
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})
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// Alternatively the attempt to connect can fail completely, so
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// we never get into the "connect" state.
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this.ide.socket.on('connect_failed', () => {
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this.updateConnectionManagerState('error')
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this.connected = false
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return this.$scope.$apply(() => {
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return (this.$scope.state.error =
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"Unable to connect, please view the <u><a href='/learn/Kb/Connection_problems'>connection problems guide</a></u> to fix the issue.")
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})
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})
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// We can get a "disconnect" event at any point after the
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// "connect" event.
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this.ide.socket.on('disconnect', () => {
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sl_console.log('[socket.io disconnect] Disconnected')
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this.connected = false
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this.ide.pushEvent('disconnected')
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if (!this.$scope.connection.state.match(/^waiting/)) {
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if (
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!this.$scope.connection.forced_disconnect &&
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!this.userIsInactive &&
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!this.shuttingDown
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) {
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this.startAutoReconnectCountdown()
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} else {
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this.updateConnectionManagerState('inactive')
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}
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}
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})
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// Site administrators can send the forceDisconnect event to all users
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this.ide.socket.on('forceDisconnect', message => {
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this.updateConnectionManagerState('inactive')
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this.$scope.$apply(() => {
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this.$scope.permissions.write = false
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return (this.$scope.connection.forced_disconnect = true)
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})
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this.ide.socket.disconnect()
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this.ide.showGenericMessageModal(
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'Please Refresh',
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`\
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We're performing maintenance on Overleaf and you need to refresh the editor.
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Sorry for any inconvenience.
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The editor will refresh in automatically in 10 seconds.\
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`
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)
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return setTimeout(() => location.reload(), 10 * 1000)
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})
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this.ide.socket.on('reconnectGracefully', () => {
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sl_console.log('Reconnect gracefully')
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this.reconnectGracefully()
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})
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}
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updateConnectionManagerState(state) {
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this.$scope.$apply(() => {
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this.$scope.connection.jobId += 1
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let jobId = this.$scope.connection.jobId
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sl_console.log(
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`[updateConnectionManagerState ${jobId}] from ${this.$scope.connection.state} to ${state}`
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)
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this.$scope.connection.state = state
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this.$scope.connection.reconnecting = false
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this.$scope.connection.stillReconnecting = false
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this.$scope.connection.inactive_disconnect = false
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this.$scope.connection.joining = false
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this.$scope.connection.reconnection_countdown = null
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if (state === 'connecting') {
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// initial connection
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} else if (state === 'reconnecting') {
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// reconnection after a connection has failed
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this.stopReconnectCountdownTimer()
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this.$scope.connection.reconnecting = true
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// if reconnecting takes more than 1s (it doesn't, usually) show the
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// 'reconnecting...' warning
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setTimeout(() => {
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if (
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this.$scope.connection.reconnecting &&
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this.$scope.connection.jobId === jobId
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) {
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this.$scope.connection.stillReconnecting = true
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}
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}, 1000)
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} else if (state === 'reconnectFailed') {
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// reconnect attempt failed
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} else if (state === 'authenticating') {
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// socket connection has been established, trying to authenticate
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} else if (state === 'joining') {
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// authenticated, joining project
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this.$scope.connection.joining = true
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} else if (state === 'ready') {
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// project has been joined
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} else if (state === 'waitingCountdown') {
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// disconnected and waiting to reconnect via the countdown timer
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this.stopReconnectCountdownTimer()
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} else if (state === 'waitingGracefully') {
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// disconnected and waiting to reconnect gracefully
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this.stopReconnectCountdownTimer()
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} else if (state === 'inactive') {
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// disconnected and not trying to reconnect (inactive)
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} else if (state === 'error') {
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// something is wrong
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} else {
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sl_console.log(
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`[WARN] [updateConnectionManagerState ${jobId}] got unrecognised state ${state}`
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)
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}
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})
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}
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expectConnectionManagerState(state, jobId) {
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if (
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this.$scope.connection.state === state &&
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(!jobId || jobId === this.$scope.connection.jobId)
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) {
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return true
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}
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sl_console.log(
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`[WARN] [state mismatch] expected state ${state}${
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jobId ? '/' + jobId : ''
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} when in ${this.$scope.connection.state}/${
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this.$scope.connection.jobId
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}`
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)
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return false
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}
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// Error reporting, which can reload the page if appropriate
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reportConnectionError(err) {
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sl_console.log('[socket.io] reporting connection error')
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this.updateConnectionManagerState('error')
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if (
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(err != null ? err.message : undefined) === 'not authorized' ||
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(err != null ? err.message : undefined) === 'invalid session'
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) {
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return (window.location = `/login?redir=${encodeURI(
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window.location.pathname
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)}`)
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} else {
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this.ide.socket.disconnect()
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return this.ide.showGenericMessageModal(
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'Something went wrong connecting',
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`\
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Something went wrong connecting to your project. Please refresh if this continues to happen.\
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`
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)
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}
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}
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joinProject(connectionId) {
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sl_console.log(`[joinProject ${connectionId}] joining...`)
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// Note: if the "joinProject" message doesn't reach the server
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// (e.g. if we are in a disconnected state at this point) the
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// callback will never be executed
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if (!this.expectConnectionManagerState('joining', connectionId)) {
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sl_console.log(
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`[joinProject ${connectionId}] aborting with stale connection`
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)
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return
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}
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const data = {
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project_id: this.ide.project_id
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}
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if (window.anonymousAccessToken) {
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data.anonymousAccessToken = window.anonymousAccessToken
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}
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this.ide.socket.emit(
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'joinProject',
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data,
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(err, project, permissionsLevel, protocolVersion) => {
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if (err != null || project == null) {
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err = err || {}
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if (err.code === 'ProjectNotFound') {
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// A stale browser tab tried to join a deleted project.
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// Reloading the page will render a 404.
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this.ide
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.showGenericMessageModal(
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'Project has been deleted',
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'This project has been deleted by the owner.'
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)
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.result.then(() => location.reload(true))
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return
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}
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if (err.code === 'TooManyRequests') {
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sl_console.log(
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`[joinProject ${connectionId}] retrying: ${err.message}`
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)
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setTimeout(
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() => this.joinProject(connectionId),
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this.joinProjectRetryInterval
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)
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if (
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this.joinProjectRetryInterval <
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this.JOIN_PROJECT_MAX_RETRY_INTERVAL
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) {
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this.joinProjectRetryInterval += this.JOIN_PROJECT_RETRY_INTERVAL
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}
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return
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} else {
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return this.reportConnectionError(err)
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}
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}
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this.joinProjectRetryInterval = this.JOIN_PROJECT_RETRY_INTERVAL
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if (
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this.$scope.protocolVersion != null &&
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this.$scope.protocolVersion !== protocolVersion
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) {
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location.reload(true)
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}
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this.$scope.$apply(() => {
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this.updateConnectionManagerState('ready')
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this.$scope.protocolVersion = protocolVersion
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const defaultProjectAttributes = { rootDoc_id: null }
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this.$scope.project = { ...defaultProjectAttributes, ...project }
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this.$scope.permissionsLevel = permissionsLevel
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this.ide.loadingManager.socketLoaded()
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this.$scope.$broadcast('project:joined')
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})
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}
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)
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}
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reconnectImmediately() {
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this.disconnect()
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return this.tryReconnect()
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}
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disconnect(options) {
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if (options && options.permanent) {
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sl_console.log('[disconnect] shutting down ConnectionManager')
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this.updateConnectionManagerState('inactive')
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this.shuttingDown = true // prevent reconnection attempts
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} else if (this.ide.socket.socket && !this.ide.socket.socket.connected) {
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sl_console.log(
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'[socket.io] skipping disconnect because socket.io has not connected'
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)
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return
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}
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sl_console.log('[socket.io] disconnecting client')
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return this.ide.socket.disconnect()
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}
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startAutoReconnectCountdown() {
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this.updateConnectionManagerState('waitingCountdown')
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let connectionId = this.$scope.connection.jobId
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let countdown
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sl_console.log('[ConnectionManager] starting autoreconnect countdown')
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const twoMinutes = 2 * 60 * 1000
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if (
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this.lastUserAction != null &&
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new Date() - this.lastUserAction > twoMinutes
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) {
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// between 1 minute and 3 minutes
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countdown = 60 + Math.floor(Math.random() * 120)
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} else {
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countdown = 3 + Math.floor(Math.random() * 7)
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}
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if (this.userIsLeavingPage) {
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// user will have pressed refresh or back etc
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return
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}
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this.$scope.$apply(() => {
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this.$scope.connection.reconnecting = false
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this.$scope.connection.stillReconnecting = false
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this.$scope.connection.joining = false
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this.$scope.connection.reconnection_countdown = countdown
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})
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setTimeout(() => {
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if (!this.connected && !this.countdownTimeoutId) {
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this.countdownTimeoutId = setTimeout(
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() => this.decreaseCountdown(connectionId),
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1000
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)
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}
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}, 200)
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}
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stopReconnectCountdownTimer() {
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// clear timeout and set to null so we know there is no countdown running
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if (this.countdownTimeoutId != null) {
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sl_console.log(
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'[ConnectionManager] cancelling existing reconnect timer'
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)
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clearTimeout(this.countdownTimeoutId)
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this.countdownTimeoutId = null
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}
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}
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decreaseCountdown(connectionId) {
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this.countdownTimeoutId = null
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if (this.$scope.connection.reconnection_countdown == null) {
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return
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}
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if (
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!this.expectConnectionManagerState('waitingCountdown', connectionId)
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) {
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sl_console.log(
|
|
`[ConnectionManager] Aborting stale countdown ${connectionId}`
|
|
)
|
|
return
|
|
}
|
|
|
|
sl_console.log(
|
|
'[ConnectionManager] decreasing countdown',
|
|
this.$scope.connection.reconnection_countdown
|
|
)
|
|
this.$scope.$apply(() => {
|
|
this.$scope.connection.reconnection_countdown--
|
|
})
|
|
|
|
if (this.$scope.connection.reconnection_countdown <= 0) {
|
|
this.$scope.connection.reconnecting = false
|
|
this.$scope.$apply(() => {
|
|
this.tryReconnect()
|
|
})
|
|
} else {
|
|
this.countdownTimeoutId = setTimeout(
|
|
() => this.decreaseCountdown(connectionId),
|
|
1000
|
|
)
|
|
}
|
|
}
|
|
|
|
tryReconnect() {
|
|
sl_console.log('[ConnectionManager] tryReconnect')
|
|
if (
|
|
this.connected ||
|
|
this.shuttingDown ||
|
|
this.$scope.connection.reconnecting
|
|
) {
|
|
return
|
|
}
|
|
this.updateConnectionManagerState('reconnecting')
|
|
sl_console.log('[ConnectionManager] Starting new connection')
|
|
|
|
const removeHandler = () => {
|
|
this.ide.socket.removeListener('error', handleFailure)
|
|
this.ide.socket.removeListener('connect', handleSuccess)
|
|
}
|
|
const handleFailure = () => {
|
|
sl_console.log('[ConnectionManager] tryReconnect: failed')
|
|
removeHandler()
|
|
this.updateConnectionManagerState('reconnectFailed')
|
|
this.tryReconnectWithRateLimit({ force: true })
|
|
}
|
|
const handleSuccess = () => {
|
|
sl_console.log('[ConnectionManager] tryReconnect: success')
|
|
removeHandler()
|
|
}
|
|
this.ide.socket.on('error', handleFailure)
|
|
this.ide.socket.on('connect', handleSuccess)
|
|
|
|
// use socket.io connect() here to make a single attempt, the
|
|
// reconnect() method makes multiple attempts
|
|
this.ide.socket.socket.connect()
|
|
// record the time of the last attempt to connect
|
|
this.lastConnectionAttempt = new Date()
|
|
}
|
|
|
|
tryReconnectWithRateLimit(options) {
|
|
// bail out if the reconnect is already in progress
|
|
if (this.$scope.connection.reconnecting || this.connected) {
|
|
return
|
|
}
|
|
// bail out if we are going to reconnect soon anyway
|
|
const reconnectingSoon =
|
|
this.$scope.connection.reconnection_countdown != null &&
|
|
this.$scope.connection.reconnection_countdown <= 5
|
|
const clickedTryNow = options != null ? options.force : undefined // user requested reconnection
|
|
if (reconnectingSoon && !clickedTryNow) {
|
|
return
|
|
}
|
|
// bail out if we tried reconnecting recently
|
|
const allowedInterval = clickedTryNow
|
|
? this.MIN_RETRY_INTERVAL
|
|
: this.BACKGROUND_RETRY_INTERVAL
|
|
if (
|
|
this.lastConnectionAttempt != null &&
|
|
new Date() - this.lastConnectionAttempt < allowedInterval
|
|
) {
|
|
if (this.$scope.connection.state !== 'waitingCountdown') {
|
|
this.startAutoReconnectCountdown()
|
|
}
|
|
return
|
|
}
|
|
this.tryReconnect()
|
|
}
|
|
|
|
disconnectIfInactive() {
|
|
this.userIsInactive =
|
|
new Date() - this.lastUserAction > this.disconnectAfterMs
|
|
if (this.userIsInactive && this.connected) {
|
|
this.disconnect()
|
|
return this.$scope.$apply(() => {
|
|
return (this.$scope.connection.inactive_disconnect = true)
|
|
}) // 5 minutes
|
|
}
|
|
}
|
|
|
|
reconnectGracefully(force) {
|
|
if (this.reconnectGracefullyStarted == null) {
|
|
this.reconnectGracefullyStarted = new Date()
|
|
} else {
|
|
if (!force) {
|
|
sl_console.log(
|
|
'[reconnectGracefully] reconnection is already in process, so skipping'
|
|
)
|
|
return
|
|
}
|
|
}
|
|
const userIsInactive =
|
|
new Date() - this.lastUserAction >
|
|
this.RECONNECT_GRACEFULLY_RETRY_INTERVAL
|
|
const maxIntervalReached =
|
|
new Date() - this.reconnectGracefullyStarted >
|
|
this.MAX_RECONNECT_GRACEFULLY_INTERVAL
|
|
if (userIsInactive || maxIntervalReached) {
|
|
sl_console.log(
|
|
"[reconnectGracefully] User didn't do anything for last 5 seconds, reconnecting"
|
|
)
|
|
this._reconnectGracefullyNow()
|
|
} else {
|
|
sl_console.log(
|
|
'[reconnectGracefully] User is working, will try again in 5 seconds'
|
|
)
|
|
this.updateConnectionManagerState('waitingGracefully')
|
|
setTimeout(() => {
|
|
this.reconnectGracefully(true)
|
|
}, this.RECONNECT_GRACEFULLY_RETRY_INTERVAL)
|
|
}
|
|
}
|
|
|
|
_reconnectGracefullyNow() {
|
|
this.gracefullyReconnecting = true
|
|
this.reconnectGracefullyStarted = null
|
|
// Clear cookie so we don't go to the same backend server
|
|
$.cookie('SERVERID', '', { expires: -1, path: '/' })
|
|
return this.reconnectImmediately()
|
|
}
|
|
}
|
|
ConnectionManager.initClass()
|
|
return ConnectionManager
|
|
})()
|