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server_setup.coffee
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server_setup.coffee
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express = require 'express'
path = require 'path'
useragent = require 'express-useragent'
fs = require 'graceful-fs'
log = require 'winston'
compressible = require 'compressible'
compression = require 'compression'
geoip = require '@basicer/geoip-lite'
crypto = require 'crypto'
config = require './server_config'
global.tv4 = require 'tv4' # required for TreemaUtils to work
global.jsondiffpatch = require('jsondiffpatch')
global.stripe = require('stripe')(config.stripe.secretKey)
request = require 'request'
Promise = require 'bluebird'
Promise.promisifyAll(request, {multiArgs: true})
Promise.promisifyAll(fs)
wrap = require 'co-express'
morgan = require 'morgan'
timeout = require('connect-timeout')
{countries} = require './app/core/utils'
productionLogging = (tokens, req, res) ->
status = res.statusCode
color = 32
if status >= 500 then color = 31
else if status >= 400 then color = 33
else if status >= 300 then color = 36
elapsed = (new Date()) - req._startTime
elapsedColor = if elapsed < 500 then 90 else 31
return null if status is 404 and /\/feedback/.test req.originalUrl # We know that these usually 404 by design (bad design?)
if (status isnt 200 and status isnt 201 and status isnt 204 and status isnt 304 and status isnt 302) or elapsed > 500
return "[#{config.clusterID}] \x1b[90m#{req.method} #{req.originalUrl} \x1b[#{color}m#{res.statusCode} \x1b[#{elapsedColor}m#{elapsed}ms\x1b[0m"
null
developmentLogging = (tokens, req, res) ->
status = res.statusCode
color = 32
if status >= 500 then color = 31
else if status >= 400 then color = 33
else if status >= 300 then color = 36
elapsed = (new Date()) - req._startTime
elapsedColor = if elapsed < 500 then 90 else 31
s = "\x1b[90m#{req.method} #{req.originalUrl} \x1b[#{color}m#{res.statusCode} \x1b[#{elapsedColor}m#{elapsed}ms\x1b[0m"
s += ' (proxied)' if req.proxied
return s
setupExpressMiddleware = (app) ->
if config.isProduction
morgan.format('prod', productionLogging)
app.use(morgan('prod'))
app.use compression filter: (req, res) ->
return false if req.headers.host is 'codecombat.com' # CloudFlare will gzip it for us on codecombat.com
compressible res.getHeader('Content-Type')
else if not global.testing or config.TRACE_ROUTES
morgan.format('dev', developmentLogging)
app.use(morgan('dev'))
app.use (req, res, next) ->
res.header 'X-Cluster-ID', config.clusterID
next()
public_path = path.join(__dirname, 'public')
app.use('/', express.static(path.join(public_path, 'templates', 'static')))
if config.buildInfo.sha isnt 'dev' and config.isProduction
app.use("/#{config.buildInfo.sha}", express.static(public_path, maxAge: '1y'))
else
app.use('/dev', express.static(public_path, maxAge: 0)) # CloudFlare overrides maxAge, and we don't want local development caching.
app.use(express.static(public_path, maxAge: 0))
if config.proxy
# Don't proxy static files with sha prefixes, redirect them
regex = /\/[0-9a-f]{40}\/.*/
regex2 = /\/[0-9a-f]{40}-[0-9a-f]{40}\/.*/
app.use (req, res, next) ->
if regex.test(req.path)
newPath = req.path.slice(41)
return res.redirect(newPath)
if regex2.test(req.path)
newPath = req.path.slice(82)
return res.redirect(newPath)
next()
setupProxyMiddleware app # TODO: Flatten setup into one function. This doesn't fit its function name.
app.use require('serve-favicon') path.join(__dirname, 'public', 'images', 'favicon.ico')
app.use require('cookie-parser')()
app.use require('body-parser').json({limit: '25mb', strict: false, verify: (req, res, buf, encoding) ->
if req.headers['x-hub-signature']
# this is an intercom webhook request, with signature that needs checking
try
digest = crypto.createHmac('sha1', config.intercom.webhookHubSecret).update(buf).digest('hex')
req.signatureMatches = req.headers['x-hub-signature'] is "sha1=#{digest}"
catch e
log.info 'Error checking hub signature on Intercom webhook: ' + e
})
app.use require('body-parser').urlencoded extended: true, limit: '25mb'
app.use require('method-override')()
app.use require('cookie-session')
key: 'codecombat.sess'
secret: config.cookie_secret
setupCountryTaggingMiddleware = (app) ->
app.use (req, res, next) ->
return next() if req.country or req.user?.get('country')
return next() unless ip = req.headers['x-forwarded-for'] or req.ip or req.connection.remoteAddress
ip = ip.split(/,? /)[0] # If there are two IP addresses, say because of CloudFlare, we just take the first.
geo = geoip.lookup(ip)
if countryInfo = _.find(countries, countryCode: geo?.country)
req.country = countryInfo.country
next()
setupCountryRedirectMiddleware = (app, country='china', host='cn.codecombat.com') ->
hosts = host.split /;/g
shouldRedirectToCountryServer = (req) ->
reqHost = (req.hostname ? req.host ? '').toLowerCase() # Work around express 3.0
return req.country is country and reqHost not in hosts and reqHost.indexOf(config.unsafeContentHostname) is -1
app.use (req, res, next) ->
if shouldRedirectToCountryServer(req) and hosts.length
res.writeHead 302, "Location": 'http://' + hosts[0] + req.url
res.end()
else
next()
setupOneSecondDelayMiddleware = (app) ->
if(config.slow_down)
app.use((req, res, next) -> setTimeout((-> next()), 1000))
setupMiddlewareToSendOldBrowserWarningWhenPlayersViewLevelDirectly = (app) ->
isOldBrowser = (req) ->
# https://github.com/biggora/express-useragent/blob/master/lib/express-useragent.js
return false unless ua = req.useragent
return true if ua.isiPad or ua.isiPod or ua.isiPhone or ua.isOpera
return false unless ua and ua.Browser in ['Chrome', 'Safari', 'Firefox', 'IE'] and ua.Version
b = ua.Browser
try
v = parseInt ua.Version.split('.')[0], 10
catch TypeError
log.error('ua.Version does not have a split function.', JSON.stringify(ua, null, ' '))
return false
return true if b is 'Chrome' and v < 17
return true if b is 'Safari' and v < 6
return true if b is 'Firefox' and v < 21
return true if b is 'IE' and v < 11
false
app.use '/play/', useragent.express()
app.use '/play/', (req, res, next) ->
return next() if req.path?.indexOf('web-dev-level') >= 0
return next() if req.query['try-old-browser-anyway'] or not isOldBrowser req
res.sendfile(path.join(__dirname, 'public', 'index_old_browser.html'))
setupRedirectMiddleware = (app) ->
app.all '/account/profile/*', (req, res, next) ->
nameOrID = req.path.split('/')[3]
res.redirect 301, "/user/#{nameOrID}/profile"
setupFeaturesMiddleware = (app) ->
app.use (req, res, next) ->
# TODO: Share these defaults with run-tests.js
req.features = features = {
freeOnly: false
}
if req.headers.host is 'brainpop.codecombat.com' or req.session.featureMode is 'brain-pop'
features.freeOnly = true
features.campaignSlugs = ['dungeon']
features.playViewsOnly = true
features.noAuth = true
features.brainPop = true
features.noAds = true
if req.headers.host is 'cp.codecombat.com' or req.session.featureMode is 'code-play'
features.freeOnly = true
features.campaignSlugs = ['dungeon', 'forest', 'desert']
features.playViewsOnly = true
features.codePlay = true # for one-off changes. If they're shared across different scenarios, refactor
if /cn\.codecombat\.com/.test(req.get('host')) or /koudashijie/.test(req.get('host')) or req.session.featureMode is 'china'
features.china = true
features.freeOnly = true
features.noAds = true
if config.picoCTF or req.session.featureMode is 'pico-ctf'
features.playOnly = true
features.noAds = true
features.picoCtf = true
if config.chinaInfra
features.chinaInfra = true
next()
# When config.TRACE_ROUTES is set, this logs a stack trace every time an endpoint sends a response.
# It's great for finding where a mystery endpoint is!
# The same is done for errors in the error-handling middleware.
setupHandlerTraceMiddleware = (app) ->
app.use (req, res, next) ->
oldSend = res.send
res.send = ->
result = oldSend.apply(@, arguments)
console.trace()
return result
next()
setupSecureMiddleware = (app) ->
# Cannot use express request `secure` property in production, due to
# cluster setup.
isSecure = ->
return @secure or @headers['x-forwarded-proto'] is 'https'
app.use (req, res, next) ->
req.isSecure = isSecure
next()
exports.setupMiddleware = (app) ->
app.use(timeout(config.timeout))
setupHandlerTraceMiddleware app if config.TRACE_ROUTES
setupSecureMiddleware app
setupQuickBailToMainHTML app
setupCountryTaggingMiddleware app
setupMiddlewareToSendOldBrowserWarningWhenPlayersViewLevelDirectly app
setupExpressMiddleware app
setupFeaturesMiddleware app
setupCountryRedirectMiddleware app, 'china', config.chinaDomain
setupCountryRedirectMiddleware app, 'brazil', config.brazilDomain
setupOneSecondDelayMiddleware app
setupRedirectMiddleware app
setupAjaxCaching app
setupJavascript404s app
###Routing function implementations###
setupAjaxCaching = (app) ->
# IE/Edge are more aggressive about caching than other browsers, so we'll override their caching here.
# Assumes our CDN will override these with its own caching rules.
app.get '/db/*', (req, res, next) ->
return next() unless req.xhr
# http://stackoverflow.com/questions/19999388/check-if-user-is-using-ie-with-jquery
userAgent = req.header('User-Agent') or ""
if userAgent.indexOf('MSIE ') > 0 or !!userAgent.match(/Trident.*rv\:11\.|Edge\/\d+/)
res.header 'Cache-Control', 'no-cache, no-store, must-revalidate'
res.header 'Pragma', 'no-cache'
res.header 'Expires', 0
next()
setupJavascript404s = (app) ->
app.get '/javascripts/*', (req, res) ->
res.status(404).send('Not found')
app.get(/^\/?[a-f0-9]{40}/, (req, res) ->
res.status(404).send('Wrong hash')
)
templates = {}
getStaticTemplate = (file) ->
# Don't cache templates in devlopment so you can just edit then.
return templates[file] if templates[file] and config.isProduction
templates[file] = fs.readFileAsync(path.join(__dirname, 'public', 'templates', 'static', file), 'utf8')
renderMain = wrap (template, req, res) ->
template = yield getStaticTemplate(template)
res.status(200).send template
setupQuickBailToMainHTML = (app) ->
fast = (template) ->
(req, res, next) ->
req.features = features = {}
if config.isProduction or true
res.header 'Cache-Control', 'public, max-age=60'
res.header 'Expires', 60
else
res.header 'Cache-Control', 'no-cache, no-store, must-revalidate'
res.header 'Pragma', 'no-cache'
res.header 'Expires', 0
if req.headers.host is 'cp.codecombat.com'
features.codePlay = true # for one-off changes. If they're shared across different scenarios, refactor
if /cn\.codecombat\.com/.test(req.get('host'))
features.china = true
if config.chinaInfra
features.chinaInfra = true
renderMain(template, req, res)
app.get '/', fast('home.html')
app.get '/home', fast('home.html')
app.get '/about', fast('about.html')
app.get '/features', fast('premium-features.html')
app.get '/privacy', fast('privacy.html')
app.get '/legal', fast('legal.html')
app.get '/play', fast('overworld.html')
app.get '/play/level/:slug', fast('main.html')
app.get '/play/:slug', fast('main.html')
# Mongo-cache doesnt support the .exec() promise, so we manually wrap it.
# getMandate = (app) ->
# return new Promise (res, rej) ->
# Mandate.findOne({}).cache(5 * 60 * 1000).exec (err, data) ->
# return rej(err) if err
# res(data)
###Miscellaneous configuration functions###
exports.setExpressConfigurationOptions = (app) ->
app.set('port', config.port)
app.set('views', __dirname + '/app/views')
app.set('view engine', 'jade')
app.set('view options', { layout: false })
app.set('env', if config.isProduction then 'production' else 'development')
app.set('json spaces', 0) if config.isProduction
setupProxyMiddleware = (app) ->
return if config.isProduction
return unless config.proxy
httpProxy = require 'http-proxy'
proxy = httpProxy.createProxyServer({
target: 'https://very.direct.codecombat.com'
secure: false
})
log.info 'Using dev proxy server'
app.use (req, res, next) ->
req.proxied = true
proxy.web req, res, (e) ->
console.warn("Failed to proxy: ", e)
res.status(502).send({message: 'Proxy failed'})