overleaf/services/web/app/coffee/infrastructure/ExpressLocals.coffee

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logger = require 'logger-sharelatex'
fs = require 'fs'
crypto = require 'crypto'
Settings = require('settings-sharelatex')
SubscriptionFormatters = require('../Features/Subscription/SubscriptionFormatters')
querystring = require('querystring')
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SystemMessageManager = require("../Features/SystemMessages/SystemMessageManager")
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AuthenticationController = require("../Features/Authentication/AuthenticationController")
_ = require("underscore")
async = require("async")
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Modules = require "./Modules"
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Url = require "url"
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fingerprints = {}
Path = require 'path'
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jsPath =
if Settings.useMinifiedJs
"/minjs/"
else
"/js/"
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getFileContent = (filePath)->
filePath = Path.join __dirname, "../../../", "public#{filePath}"
exists = fs.existsSync filePath
if exists
content = fs.readFileSync filePath
return content
else
logger.log filePath:filePath, "file does not exist for fingerprints"
return ""
logger.log "Generating file fingerprints..."
pathList = [
["#{jsPath}libs/require.js"]
["#{jsPath}ide.js"]
["#{jsPath}main.js"]
["#{jsPath}libs.js"]
["#{jsPath}ace/ace.js","#{jsPath}ace/mode-latex.js", "#{jsPath}ace/snippets/latex.js"]
["#{jsPath}libs/pdfjs-1.3.91p1/pdf.js"]
["#{jsPath}libs/pdfjs-1.3.91p1/pdf.worker.js"]
["#{jsPath}libs/pdfjs-1.3.91p1/compatibility.js"]
["/stylesheets/style.css"]
]
for paths in pathList
contentList = _.map(paths, getFileContent)
content = contentList.join("")
hash = crypto.createHash("md5").update(content).digest("hex")
_.each paths, (filePath)->
logger.log "#{filePath}: #{hash}"
fingerprints[filePath] = hash
getFingerprint = (path) ->
if fingerprints[path]?
return fingerprints[path]
else
logger.err "No fingerprint for file: #{path}"
return ""
logger.log "Finished generating file fingerprints"
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cdnAvailable = Settings.cdn?.web?.host?
darkCdnAvailable = Settings.cdn?.web?.darkHost?
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module.exports = (app, webRouter, apiRouter)->
webRouter.use (req, res, next)->
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res.locals.session = req.session
next()
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webRouter.use (req, res, next)->
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cdnBlocked = req.query.nocdn == 'true' or req.session.cdnBlocked
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user_id = AuthenticationController.getLoggedInUserId(req)
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if cdnBlocked and !req.session.cdnBlocked?
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logger.log user_id:user_id, ip:req?.ip, "cdnBlocked for user, not using it and turning it off for future requets"
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req.session.cdnBlocked = true
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isDark = req.headers?.host?.slice(0,4)?.toLowerCase() == "dark"
isSmoke = req.headers?.host?.slice(0,5)?.toLowerCase() == "smoke"
isLive = !isDark and !isSmoke
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if cdnAvailable and isLive and !cdnBlocked
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staticFilesBase = Settings.cdn?.web?.host
else if darkCdnAvailable and isDark
staticFilesBase = Settings.cdn?.web?.darkHost
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else
staticFilesBase = ""
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res.locals.jsPath = jsPath
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res.locals.fullJsPath = Url.resolve(staticFilesBase, jsPath)
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res.locals.buildJsPath = (jsFile, opts = {})->
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path = Path.join(jsPath, jsFile)
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doFingerPrint = opts.fingerprint != false
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if !opts.qs?
opts.qs = {}
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if !opts.qs?.fingerprint? and doFingerPrint
opts.qs.fingerprint = getFingerprint(path)
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if opts.cdn != false
path = Url.resolve(staticFilesBase, path)
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qs = querystring.stringify(opts.qs)
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if qs? and qs.length > 0
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path = path + "?" + qs
return path
res.locals.buildCssPath = (cssFile)->
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path = Path.join("/stylesheets/", cssFile)
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return Url.resolve(staticFilesBase, path) + "?fingerprint=" + getFingerprint(path)
res.locals.buildImgPath = (imgFile)->
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path = Path.join("/img/", imgFile)
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return Url.resolve(staticFilesBase, path)
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next()
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webRouter.use (req, res, next)->
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res.locals.settings = Settings
next()
webRouter.use (req, res, next)->
res.locals.translate = (key, vars = {}) ->
vars.appName = Settings.appName
req.i18n.translate(key, vars)
# Don't include the query string parameters, otherwise Google
# treats ?nocdn=true as the canonical version
res.locals.currentUrl = Url.parse(req.originalUrl).pathname
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next()
webRouter.use (req, res, next)->
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res.locals.getSiteHost = ->
Settings.siteUrl.substring(Settings.siteUrl.indexOf("//")+2)
next()
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webRouter.use (req, res, next) ->
res.locals.getUserEmail = ->
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user = AuthenticationController.getSessionUser(req)
email = user?.email or ""
return email
next()
webRouter.use (req, res, next)->
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res.locals.formatProjectPublicAccessLevel = (privilegeLevel)->
formatedPrivileges = private:"Private", readOnly:"Public: Read Only", readAndWrite:"Public: Read and Write"
return formatedPrivileges[privilegeLevel] || "Private"
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next()
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webRouter.use (req, res, next)->
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res.locals.buildReferalUrl = (referal_medium) ->
url = Settings.siteUrl
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currentUser = AuthenticationController.getSessionUser(req)
if currentUser? and currentUser?.referal_id?
url+="?r=#{currentUser.referal_id}&rm=#{referal_medium}&rs=b" # Referal source = bonus
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return url
res.locals.getReferalId = ->
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currentUser = AuthenticationController.getSessionUser(req)
if currentUser? and currentUser?.referal_id?
return currentUser.referal_id
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res.locals.getReferalTagLine = ->
tagLines = [
"Roar!"
"Shout about us!"
"Please recommend us"
"Tell the world!"
"Thanks for using ShareLaTeX"
]
return tagLines[Math.floor(Math.random()*tagLines.length)]
res.locals.getRedirAsQueryString = ->
if req.query.redir?
return "?#{querystring.stringify({redir:req.query.redir})}"
return ""
res.locals.getLoggedInUserId = ->
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return AuthenticationController.getLoggedInUserId(req)
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res.locals.isUserLoggedIn = ->
return AuthenticationController.isUserLoggedIn(req)
res.locals.getSessionUser = ->
return AuthenticationController.getSessionUser(req)
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next()
webRouter.use (req, res, next) ->
res.locals.csrfToken = req?.csrfToken()
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next()
webRouter.use (req, res, next) ->
res.locals.getReqQueryParam = (field)->
return req.query?[field]
next()
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webRouter.use (req, res, next)->
res.locals.fingerprint = getFingerprint
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next()
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webRouter.use (req, res, next)->
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res.locals.formatPrice = SubscriptionFormatters.formatPrice
next()
webRouter.use (req, res, next)->
res.locals.externalAuthenticationSystemUsed = ->
Settings.ldap?
next()
webRouter.use (req, res, next)->
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currentUser = AuthenticationController.getSessionUser(req)
if currentUser?
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res.locals.user =
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email: currentUser.email
first_name: currentUser.first_name
last_name: currentUser.last_name
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if req.session.justRegistered
res.locals.justRegistered = true
delete req.session.justRegistered
if req.session.justLoggedIn
res.locals.justLoggedIn = true
delete req.session.justLoggedIn
res.locals.gaToken = Settings.analytics?.ga?.token
res.locals.tenderUrl = Settings.tenderUrl
res.locals.sentrySrc = Settings.sentry?.src
res.locals.sentryPublicDSN = Settings.sentry?.publicDSN
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next()
webRouter.use (req, res, next) ->
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if req.query? and req.query.scribtex_path?
res.locals.lookingForScribtex = true
res.locals.scribtexPath = req.query.scribtex_path
next()
webRouter.use (req, res, next) ->
# Clone the nav settings so they can be modified for each request
res.locals.nav = {}
for key, value of Settings.nav
res.locals.nav[key] = _.clone(Settings.nav[key])
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res.locals.templates = Settings.templateLinks
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next()
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webRouter.use (req, res, next) ->
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SystemMessageManager.getMessages (error, messages = []) ->
res.locals.systemMessages = messages
next()
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webRouter.use (req, res, next)->
res.locals.query = req.query
next()
webRouter.use (req, res, next)->
subdomain = _.find Settings.i18n.subdomainLang, (subdomain)->
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subdomain.lngCode == req.showUserOtherLng and !subdomain.hide
res.locals.recomendSubdomain = subdomain
res.locals.currentLngCode = req.lng
next()
webRouter.use (req, res, next) ->
if Settings.reloadModuleViewsOnEachRequest
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Modules.loadViewIncludes()
res.locals.moduleIncludes = Modules.moduleIncludes
res.locals.moduleIncludesAvailable = Modules.moduleIncludesAvailable
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next()