mirror of https://github.com/status-im/codimd.git
316 lines
8.9 KiB
JavaScript
316 lines
8.9 KiB
JavaScript
'use strict'
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// app
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// external modules
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var express = require('express')
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var ejs = require('ejs')
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var passport = require('passport')
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var methodOverride = require('method-override')
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var cookieParser = require('cookie-parser')
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var session = require('express-session')
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var SequelizeStore = require('connect-session-sequelize')(session.Store)
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var fs = require('fs')
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var path = require('path')
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var morgan = require('morgan')
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var passportSocketIo = require('passport.socketio')
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var helmet = require('helmet')
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var i18n = require('i18n')
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var flash = require('connect-flash')
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// core
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var config = require('./lib/config')
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var logger = require('./lib/logger')
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var response = require('./lib/response')
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var models = require('./lib/models')
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var csp = require('./lib/csp')
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const { versionCheckMiddleware, checkVersion } = require('./lib/web/middleware/checkVersion')
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function createHttpServer () {
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if (config.useSSL) {
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const ca = (function () {
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let i, len
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const results = []
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for (i = 0, len = config.sslCAPath.length; i < len; i++) {
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results.push(fs.readFileSync(config.sslCAPath[i], 'utf8'))
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}
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return results
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})()
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const options = {
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key: fs.readFileSync(config.sslKeyPath, 'utf8'),
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cert: fs.readFileSync(config.sslCertPath, 'utf8'),
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ca: ca,
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dhparam: fs.readFileSync(config.dhParamPath, 'utf8'),
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requestCert: false,
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rejectUnauthorized: false
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}
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return require('https').createServer(options, app)
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} else {
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return require('http').createServer(app)
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}
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}
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// server setup
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var app = express()
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var server = createHttpServer()
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// logger
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app.use(morgan('combined', {
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stream: logger.stream
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}))
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// socket io
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var io = require('socket.io')(server)
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io.engine.ws = new (require('ws').Server)({
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noServer: true,
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perMessageDeflate: false
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})
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// others
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var realtime = require('./lib/realtime/realtime.js')
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// assign socket io to realtime
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realtime.io = io
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// methodOverride
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app.use(methodOverride('_method'))
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// session store
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var sessionStore = new SequelizeStore({
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db: models.sequelize
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})
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// use hsts to tell https users stick to this
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if (config.hsts.enable) {
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app.use(helmet.hsts({
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maxAge: config.hsts.maxAgeSeconds,
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includeSubdomains: config.hsts.includeSubdomains,
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preload: config.hsts.preload
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}))
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} else if (config.useSSL) {
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logger.info('Consider enabling HSTS for extra security:')
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logger.info('https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security')
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}
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// Add referrer policy to improve privacy
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app.use(
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helmet.referrerPolicy({
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policy: 'same-origin'
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})
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)
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// Generate a random nonce per request, for CSP with inline scripts
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app.use(csp.addNonceToLocals)
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// use Content-Security-Policy to limit XSS, dangerous plugins, etc.
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// https://helmetjs.github.io/docs/csp/
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if (config.csp.enable) {
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app.use(helmet.contentSecurityPolicy({
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directives: csp.computeDirectives()
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}))
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} else {
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logger.info('Content-Security-Policy is disabled. This may be a security risk.')
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}
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i18n.configure({
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locales: ['en', 'zh-CN', 'zh-TW', 'fr', 'de', 'ja', 'es', 'ca', 'el', 'pt', 'it', 'tr', 'ru', 'nl', 'hr', 'pl', 'uk', 'hi', 'sv', 'eo', 'da', 'ko', 'id', 'sr'],
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cookie: 'locale',
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directory: path.join(__dirname, '/locales'),
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updateFiles: config.updateI18nFiles
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})
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app.use(cookieParser())
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app.use(i18n.init)
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// routes without sessions
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// static files
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app.use('/', express.static(path.join(__dirname, '/public'), { maxAge: config.staticCacheTime, index: false }))
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app.use('/docs', express.static(path.resolve(__dirname, config.docsPath), { maxAge: config.staticCacheTime }))
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app.use('/uploads', express.static(path.resolve(__dirname, config.uploadsPath), { maxAge: config.staticCacheTime }))
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app.use('/default.md', express.static(path.resolve(__dirname, config.defaultNotePath), { maxAge: config.staticCacheTime }))
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// session
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app.use(session({
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name: config.sessionName,
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secret: config.sessionSecret,
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resave: false, // don't save session if unmodified
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saveUninitialized: true, // always create session to ensure the origin
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rolling: true, // reset maxAge on every response
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cookie: {
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maxAge: config.sessionLife
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},
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store: sessionStore
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}))
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// session resumption
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var tlsSessionStore = {}
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server.on('newSession', function (id, data, cb) {
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tlsSessionStore[id.toString('hex')] = data
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cb()
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})
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server.on('resumeSession', function (id, cb) {
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cb(null, tlsSessionStore[id.toString('hex')] || null)
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})
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// middleware which blocks requests when we're too busy
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app.use(require('./lib/middleware/tooBusy'))
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app.use(flash())
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// passport
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app.use(passport.initialize())
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app.use(passport.session())
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// check uri is valid before going further
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app.use(require('./lib/middleware/checkURIValid'))
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// redirect url without trailing slashes
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app.use(require('./lib/middleware/redirectWithoutTrailingSlashes'))
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app.use(require('./lib/middleware/codiMDVersion'))
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if (config.autoVersionCheck) {
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checkVersion(app)
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app.use(versionCheckMiddleware)
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}
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// routes need sessions
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// template files
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app.set('views', config.viewPath)
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// set render engine
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app.engine('ejs', ejs.renderFile)
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// set view engine
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app.set('view engine', 'ejs')
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// set generally available variables for all views
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app.locals.useCDN = config.useCDN
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app.locals.serverURL = config.serverURL
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app.locals.sourceURL = config.sourceURL
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app.locals.allowAnonymous = config.allowAnonymous
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app.locals.allowAnonymousEdits = config.allowAnonymousEdits
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app.locals.permission = config.permission
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app.locals.allowPDFExport = config.allowPDFExport
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app.locals.authProviders = {
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facebook: config.isFacebookEnable,
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twitter: config.isTwitterEnable,
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github: config.isGitHubEnable,
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bitbucket: config.isBitbucketEnable,
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gitlab: config.isGitLabEnable,
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mattermost: config.isMattermostEnable,
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dropbox: config.isDropboxEnable,
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google: config.isGoogleEnable,
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ldap: config.isLDAPEnable,
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ldapProviderName: config.ldap.providerName,
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saml: config.isSAMLEnable,
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oauth2: config.isOAuth2Enable,
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oauth2ProviderName: config.oauth2.providerName,
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openID: config.isOpenIDEnable,
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email: config.isEmailEnable,
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allowEmailRegister: config.allowEmailRegister
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}
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app.locals.versionInfo = {
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latest: true,
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versionItem: null
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}
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// Export/Import menu items
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app.locals.enableDropBoxSave = config.isDropboxEnable
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app.locals.enableGitHubGist = config.isGitHubEnable
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app.locals.enableGitlabSnippets = config.isGitlabSnippetsEnable
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app.use(require('./lib/routes').router)
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// response not found if no any route matxches
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app.get('*', function (req, res) {
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response.errorNotFound(res)
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})
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// socket.io secure
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io.use(realtime.secure)
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// socket.io auth
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io.use(passportSocketIo.authorize({
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cookieParser: cookieParser,
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key: config.sessionName,
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secret: config.sessionSecret,
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store: sessionStore,
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success: realtime.onAuthorizeSuccess,
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fail: realtime.onAuthorizeFail
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}))
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// socket.io heartbeat
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io.set('heartbeat interval', config.heartbeatInterval)
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io.set('heartbeat timeout', config.heartbeatTimeout)
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// socket.io connection
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io.sockets.on('connection', realtime.connection)
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// listen
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function startListen () {
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var address
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var listenCallback = function () {
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var schema = config.useSSL ? 'HTTPS' : 'HTTP'
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logger.info('%s Server listening at %s', schema, address)
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realtime.maintenance = false
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}
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// use unix domain socket if 'path' is specified
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if (config.path) {
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address = config.path
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server.listen(config.path, listenCallback)
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} else {
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address = config.host + ':' + config.port
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server.listen(config.port, config.host, listenCallback)
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}
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}
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// sync db then start listen
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models.sequelize.sync().then(function () {
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// check if realtime is ready
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if (realtime.isReady()) {
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models.Revision.checkAllNotesRevision(function (err, notes) {
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if (err) throw new Error(err)
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if (!notes || notes.length <= 0) return startListen()
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})
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} else {
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throw new Error('server still not ready after db synced')
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}
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})
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// log uncaught exception
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process.on('uncaughtException', function (err) {
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logger.error('An uncaught exception has occured.')
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logger.error(err)
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logger.error('Process will exit now.')
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process.exit(1)
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})
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// install exit handler
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function handleTermSignals () {
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logger.info('CodiMD has been killed by signal, try to exit gracefully...')
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realtime.maintenance = true
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realtime.terminate()
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// disconnect all socket.io clients
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Object.keys(io.sockets.sockets).forEach(function (key) {
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var socket = io.sockets.sockets[key]
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// notify client server going into maintenance status
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socket.emit('maintenance')
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setTimeout(function () {
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socket.disconnect(true)
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}, 0)
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})
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var checkCleanTimer = setInterval(function () {
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if (realtime.isReady()) {
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models.Revision.checkAllNotesRevision(function (err, notes) {
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if (err) return logger.error(err)
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if (!notes || notes.length <= 0) {
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clearInterval(checkCleanTimer)
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return process.exit(0)
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}
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})
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}
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}, 100)
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setTimeout(() => {
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process.exit(1)
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}, 5000)
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}
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process.on('SIGINT', handleTermSignals)
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process.on('SIGTERM', handleTermSignals)
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process.on('SIGQUIT', handleTermSignals)
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