- Compile main.html into lodash template for speed.

Author: basicer

nodemon.json

@@ -7,7 +7,8 @@
         "server_config.js",
         "server_setup.coffee",
         "app/schemas",
-        "./server"
+        "./server",
+        "app/assets/main.html"
     ],
     "ext":"js coffee"
 }

server_setup.coffee

@@ -25,6 +25,8 @@ errors = require './server/commons/errors'
 request = require 'request'
 Promise = require 'bluebird'
 Promise.promisifyAll(request, {multiArgs: true})
+Promise.promisifyAll(fs)
+wrap = require 'co-express'
 codePlayTags = require './server/lib/code-play-tags'
 
 {countries} = require './app/core/utils'
@@ -279,38 +281,50 @@ setupJavascript404s = (app) ->
     res.status(404).send('Wrong hash')
   )
 
+mainTemplate = fs.readFileAsync(path.join(__dirname, 'app', 'assets', 'main.html'), 'utf8').then (data) =>
+  data = data.replace '"environmentTag"', if config.isProduction then '"production"' else '"development"'
+  data = data.replace /shaTag/g, config.buildInfo.sha
+  data = data.replace '"serverConfigTag"', '<%= mandate %>'
+  data = data.replace '"userObjectTag"', '<%= user %>'
+  data = data.replace '"serverSessionTag"', '<%= session %>'
+  data = data.replace '"featuresTag"', '<%= features %>'
+  data = data.replace '<!-- CodePlay Tags -->', '<%= codeplay %>'
+  return _.template data
+
+renderMain = wrap (req, res) ->
+  template = yield mainTemplate
+  user = if req.user then JSON.stringify(UserHandler.formatEntity(req, req.user)).replace(/\//g, '\\/') else '{}'
+
+
+  try
+    mandate = yield Mandate.findOne({}).cache(5 * 60 * 1000).exec()
+    configData =  _.omit mandate?.toObject() or {}, '_id'
+  catch err
+    log.error "Error getting mandate config: #{err}"
+    configData = {}
+
+  configData.picoCTF = config.picoCTF
+  configData.production = config.isProduction
+  configData.codeNinjas = (req.hostname ? req.host) is 'coco.code.ninja'
+  domainRegex = new RegExp("(.*\.)?(#{config.mainHostname}|#{config.unsafeContentHostname})")
+  domainPrefix = req.host.match(domainRegex)?[1] or ''
+  configData.fullUnsafeContentHostname = domainPrefix + config.unsafeContentHostname
+  configData.buildInfo = config.buildInfo
+
+  res.header 'Cache-Control', 'no-cache, no-store, must-revalidate'
+  res.header 'Pragma', 'no-cache'
+  res.header 'Expires', 0
+  str = template
+    user: user
+    session: JSON.stringify(_.pick(req.session ? {}, 'amActually', 'featureMode'))
+    features: JSON.stringify(req.features)
+    codeplay: if req.features.codePlay then codePlayTags else '<!-- CodePlay Tags -->'
+    mandate: JSON.stringify configData
+  res.status(200).send str
 
 setupFallbackRouteToIndex = (app) ->
-  app.all '*', (req, res) ->
-    fs.readFile path.join(__dirname, 'public', 'main.html'), 'utf8', (err, data) ->
-      log.error "Error modifying main.html: #{err}" if err
-      # insert the user object directly into the html so the application can have it immediately. Sanitize </script>
-      user = if req.user then JSON.stringify(UserHandler.formatEntity(req, req.user)).replace(/\//g, '\\/') else '{}'
-
-      Mandate.findOne({}).cache(5 * 60 * 1000).exec (err, mandate) ->
-        if err
-          log.error "Error getting mandate config: #{err}"
-          configData = {}
-        else
-          configData =  _.omit mandate?.toObject() or {}, '_id'
-        configData.picoCTF = config.picoCTF
-        configData.production = config.isProduction
-        configData.codeNinjas = (req.hostname ? req.host) is 'coco.code.ninja'
-        domainRegex = new RegExp("(.*\.)?(#{config.mainHostname}|#{config.unsafeContentHostname})")
-        domainPrefix = req.host.match(domainRegex)?[1] or ''
-        configData.fullUnsafeContentHostname = domainPrefix + config.unsafeContentHostname
-        configData.buildInfo = config.buildInfo
-        data = data.replace '"environmentTag"', if config.isProduction then '"production"' else '"development"'
-        data = data.replace /shaTag/g, config.buildInfo.sha
-        data = data.replace '"serverConfigTag"', JSON.stringify configData
-        data = data.replace('"userObjectTag"', user)
-        data = data.replace('"serverSessionTag"', JSON.stringify(_.pick(req.session ? {}, 'amActually', 'featureMode')))
-        data = data.replace('"featuresTag"', JSON.stringify(req.features))
-        data = data.replace('<!-- CodePlay Tags -->', codePlayTags) if req.features.codePlay
-        res.header 'Cache-Control', 'no-cache, no-store, must-revalidate'
-        res.header 'Pragma', 'no-cache'
-        res.header 'Expires', 0
-        res.send 200, data
+  app.all '*', renderMain
+    
 
 setupFacebookCrossDomainCommunicationRoute = (app) ->
   app.get '/channel.html', (req, res) ->