Repository navigation
Expand file tree
/
Copy pathapp.js
More file actions
421 lines (380 loc) · 12.7 KB
/
Copy pathapp.js
File metadata and controls
421 lines (380 loc) · 12.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
'use strict'
// app
// external modules
const express = require('express')
const ejs = require('ejs')
const passport = require('passport')
const methodOverride = require('method-override')
const cookieParser = require('cookie-parser')
const compression = require('compression')
const session = require('express-session')
const SequelizeStore = require('connect-session-sequelize')(session.Store)
const fs = require('fs')
const path = require('path')
const { Server } = require('socket.io')
const morgan = require('morgan')
const passportSocketIo = require('passport.socketio')
const helmet = require('helmet')
const i18n = require('i18n')
const flash = require('connect-flash')
const apiMetrics = require('prometheus-api-metrics')
// core
const config = require('./lib/config')
const logger = require('./lib/logger')
const errors = require('./lib/errors')
const models = require('./lib/models')
const csp = require('./lib/csp')
const metrics = require('./lib/prometheus')
const { useUnless } = require('./lib/utils')
const supportedLocalesList = Object.keys(require('./locales/_supported.json'))
// server setup
const app = express()
let server = null
if (config.useSSL) {
const ca = (function () {
let i, len
const results = []
for (i = 0, len = config.sslCAPath.length; i < len; i++) {
results.push(fs.readFileSync(config.sslCAPath[i], 'utf8'))
}
return results
})()
const options = {
key: fs.readFileSync(config.sslKeyPath, 'utf8'),
cert: fs.readFileSync(config.sslCertPath, 'utf8'),
ca,
dhparam: fs.readFileSync(config.dhParamPath, 'utf8'),
requestCert: false,
rejectUnauthorized: false
}
server = require('https').createServer(options, app)
} else {
server = require('http').createServer(app)
}
// if we manage to provide HTTPS domains, but don't provide TLS ourselves
// obviously a proxy is involded. In order to make sure express is aware of
// this, we provide the option to trust proxies here.
if (!config.useSSL && config.protocolUseSSL) {
app.set('trust proxy', 1)
}
// check if the request is from container healthcheck
function isContainerHealthCheck (req, _) {
return req.headers['user-agent'] === 'hedgedoc-container-healthcheck/1.0' && req.ip === '127.0.0.1'
}
// logger
app.use(morgan('combined', {
skip: isContainerHealthCheck,
stream: logger.stream
}))
// Register prometheus metrics endpoint
if (config.enableStatsApi) {
app.use(apiMetrics())
metrics.setupCustomPrometheusMetrics()
}
// socket io
const io = new Server(server, {
pingInterval: config.heartbeatInterval,
pingTimeout: config.heartbeatTimeout,
cors: {
origin: config.serverURL,
methods: ['GET', 'POST'],
credentials: true
},
connectionStateRecovery: {
maxDisconnectionDuration: 2 * 60 * 1000,
skipMiddlewares: false
}
})
// others
const realtime = require('./lib/realtime.js')
// assign socket io to realtime
realtime.io = io
// methodOverride
app.use(methodOverride('_method'))
// session store
const sessionStore = new SequelizeStore({
db: models.sequelize
})
// compression
app.use(compression())
// use hsts to tell https users stick to this
if (config.hsts.enable) {
app.use(helmet.hsts({
maxAge: config.hsts.maxAgeSeconds,
includeSubDomains: config.hsts.includeSubdomains,
preload: config.hsts.preload
}))
} else if (config.useSSL) {
logger.info('Consider enabling HSTS for extra security:')
logger.info('https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security')
}
// Add referrer policy to improve privacy
app.use(
helmet.referrerPolicy({
policy: 'same-origin'
})
)
// Generate a random nonce per request, for CSP with inline scripts
app.use(csp.addNonceToLocals)
// use Content-Security-Policy to limit XSS, dangerous plugins, etc.
// https://helmetjs.github.io/docs/csp/
if (config.csp.enable) {
app.use(helmet.contentSecurityPolicy({
directives: csp.computeDirectives(),
useDefaults: false
}))
} else {
logger.info('Content-Security-Policy is disabled. This may be a security risk.')
}
i18n.configure({
locales: supportedLocalesList,
cookie: 'locale',
indent: ' ', // this is the style poeditor.com exports it, this creates less churn
directory: path.join(__dirname, '/locales'),
updateFiles: config.updateI18nFiles
})
app.use(cookieParser())
app.use(i18n.init)
// routes without sessions
// security headers for uploads
app.use('/uploads', (req, res, next) => {
res.set('Content-Disposition', 'attachment')
res.set('Content-Security-Policy', "default-src 'none'; sandbox")
next()
})
// static files
app.use('/', express.static(path.join(__dirname, '/public'), {
maxAge: config.staticCacheTime,
index: false,
redirect: false
}))
app.use('/docs', express.static(path.resolve(__dirname, config.docsPath), {
maxAge: config.staticCacheTime,
redirect: false
}))
app.use('/uploads', express.static(path.resolve(__dirname, config.uploadsPath), {
maxAge: config.staticCacheTime,
redirect: false
}))
app.use('/default.md', express.static(path.resolve(__dirname, config.defaultNotePath), {
maxAge: config.staticCacheTime
}))
// session
app.use(useUnless(['/status', '/metrics', '/_health'], session({
name: config.sessionName,
secret: config.sessionSecret,
resave: false, // don't save session if unmodified
saveUninitialized: true, // always create session to ensure the origin
rolling: true, // reset maxAge on every response
cookie: {
maxAge: config.sessionLife,
sameSite: config.cookiePolicy, // be careful: setting a SameSite value of none without https breaks the editor
secure: config.useSSL || config.protocolUseSSL || false
},
store: sessionStore
})))
// session resumption
const tlsSessionStore = {}
server.on('newSession', function (id, data, cb) {
tlsSessionStore[id.toString('hex')] = data
cb()
})
server.on('resumeSession', function (id, cb) {
cb(null, tlsSessionStore[id.toString('hex')] || null)
})
// middleware which blocks requests when we're too busy
app.use(require('./lib/web/middleware/tooBusy'))
app.use(flash())
// passport
app.use(passport.initialize())
app.use(useUnless(['/status', '/metrics', '/_health'], passport.session()))
// check uri is valid before going further
app.use(require('./lib/web/middleware/checkURIValid'))
// redirect url without trailing slashes
app.use(require('./lib/web/middleware/redirectWithoutTrailingSlashes'))
app.use(require('./lib/web/middleware/hedgeDocVersion'))
// routes need sessions
// template files
app.set('views', config.viewPath)
// set render engine
app.engine('ejs', ejs.renderFile)
// set view engine
app.set('view engine', 'ejs')
// set generally available variables for all views
app.locals.serverURL = config.serverURL
app.locals.sourceURL = config.sourceURL
app.locals.allowAnonymous = config.allowAnonymous
app.locals.allowAnonymousEdits = config.allowAnonymousEdits
app.locals.disableNoteCreation = config.disableNoteCreation
app.locals.authProviders = {
facebook: config.isFacebookEnable,
twitter: config.isTwitterEnable,
github: config.isGitHubEnable,
gitlab: config.isGitLabEnable,
mattermost: config.isMattermostEnable,
dropbox: config.isDropboxEnable,
google: config.isGoogleEnable,
ldap: config.isLDAPEnable,
ldapProviderName: config.ldap.providerName,
saml: config.isSAMLEnable,
samlProviderName: config.saml.providerName,
oauth2: config.isOAuth2Enable,
oauth2ProviderName: config.oauth2.providerName,
openID: config.isOpenIDEnable,
email: config.isEmailEnable,
allowEmailRegister: config.allowEmailRegister
}
// If none of the form-based methods (LDAP, Email, OpenID) are configured and
// exactly one redirect-style external provider is, skip the "Choose method"
// dialog and link "Sign In" straight to that provider's login page.
const externalProviderKeys = ['facebook', 'twitter', 'github', 'gitlab', 'mattermost', 'dropbox', 'google', 'saml', 'oauth2']
const enabledExternalProviders = externalProviderKeys.filter((key) => app.locals.authProviders[key])
app.locals.authProviders.autoLoginProvider = (!app.locals.authProviders.ldap && !app.locals.authProviders.email && !app.locals.authProviders.openID && enabledExternalProviders.length === 1)
? enabledExternalProviders[0]
: null
// Export/Import menu items
app.locals.enableDropBoxSave = config.isDropboxEnable
app.locals.enableGitHubGist = config.isGitHubEnable
app.locals.enableGitlabSnippets = config.isGitlabSnippetsEnable
app.use(require('./lib/web/baseRouter'))
app.use(require('./lib/web/statusRouter'))
app.use(require('./lib/web/auth'))
app.use(require('./lib/web/historyRouter'))
app.use(require('./lib/web/userRouter').default)
app.use(require('./lib/web/imageRouter').default)
app.use(require('./lib/web/note/router'))
// response not found if no any route matxches
app.get('*', function (req, res) {
errors.errorNotFound(res)
})
// socket.io secure
io.use(realtime.secure)
// socket.io auth
io.use(passportSocketIo.authorize({
cookieParser,
key: config.sessionName,
secret: config.sessionSecret,
store: sessionStore,
success: realtime.onAuthorizeSuccess,
fail: realtime.onAuthorizeFail
}))
// socket.io connection
io.sockets.on('connection', realtime.connection)
// listen
function startListen () {
let address
const listenCallback = function () {
const schema = config.useSSL ? 'HTTPS' : 'HTTP'
logger.info('%s Server listening at %s', schema, address)
realtime.maintenance = false
}
// use unix domain socket if 'path' is specified
if (config.path) {
address = config.path
server.listen(config.path, listenCallback)
} else {
address = config.host + ':' + config.port
server.listen(config.port, config.host, listenCallback)
}
}
const maxDBTries = 30
let currentDBTry = 1
function syncAndListen () {
// sync db then start listen
models.sequelize.authenticate().then(function () {
models.runMigrations().then(() => {
sessionStore.sync()
// check if realtime is ready
if (realtime.isReady()) {
models.Revision.checkAllNotesRevision(function (err, notes) {
if (err) throw new Error(err)
if (!notes || notes.length <= 0) return startListen()
})
} else {
logger.error('server still not ready after db synced')
process.exit(1)
}
})
}).catch((dbError) => {
if (currentDBTry < maxDBTries) {
logger.warn(`Database cannot be reached. Try ${currentDBTry} of ${maxDBTries}. (${dbError})`)
currentDBTry++
setTimeout(function () {
syncAndListen()
}, 1000)
} else {
logger.error('Cannot reach database! Exiting.')
process.exit(1)
}
})
}
syncAndListen()
// log uncaught exception
process.on('uncaughtException', function (err) {
logger.error('An uncaught exception has occured.')
logger.error(err)
logger.error('Process will exit now.')
process.exit(1)
})
let alreadyHandlingTermSignals = false
// install exit handler
function handleTermSignals () {
if (alreadyHandlingTermSignals) {
logger.info('Forcefully exiting.')
process.exit(1)
}
logger.info('HedgeDoc has been killed by signal, try to exit gracefully...')
alreadyHandlingTermSignals = true
realtime.maintenance = true
// disconnect all socket.io clients
Array.from(io.sockets.sockets.keys()).forEach(function (key) {
const socket = io.sockets.sockets.get(key)
if (!socket) return
// notify client server going into maintenance status
socket.emit('maintenance')
setTimeout(function () {
socket.disconnect(true)
}, 0)
})
if (config.path) {
fs.unlink(config.path, err => {
if (err) {
logger.error(`Could not cleanup socket: ${err.message}`)
} else {
logger.info('Successfully cleaned up socket')
}
})
}
const maxCleanTries = 30
let currentCleanTry = 1
const checkCleanTimer = setInterval(function () {
if (realtime.isReady()) {
models.Revision.checkAllNotesRevision(function (err, notes) {
if (err) {
logger.error('Error while saving note revisions: ' + err)
if (currentCleanTry <= maxCleanTries) {
logger.warn(`Trying again. Try ${currentCleanTry} of ${maxCleanTries}`)
currentCleanTry++
return null
}
logger.error(`Could not save note revisions after ${maxCleanTries} tries! Exiting.`)
process.exit(1)
}
if (!notes || notes.length <= 0) {
clearInterval(checkCleanTimer)
process.exit(0)
}
})
} else {
logger.warn(`Real time server not ready for shutdown, trying again (${currentCleanTry}/${maxCleanTries})...`)
currentCleanTry++
if (currentCleanTry > maxCleanTries) {
logger.error('Could not save note revisions after shutdown! Exiting.')
process.exit(1)
}
}
}, 200)
}
process.on('SIGINT', handleTermSignals)
process.on('SIGTERM', handleTermSignals)
process.on('SIGQUIT', handleTermSignals)