Add npm 'proxy' script for developing client on prod server

package.json

@@ -40,7 +40,8 @@
     "nodemon": "nodemon",
     "jasmine-node": "jasmine-node",
     "multicore": "coffee multicore.coffee",
-    "jasmine": "jasmine"
+    "jasmine": "jasmine",
+    "proxy": "COCO_PROXY='true' nodemon"
   },
   "main": "index.js",
   "keywords": [
@@ -99,6 +100,7 @@
     "compressible": "~1.0.1",
     "css-brunch": "^1.7.0",
     "fs-extra": "^0.26.2",
+    "http-proxy": "^1.13.2",
     "jade-brunch": "1.7.5",
     "jasmine": "^2.4.1",
     "javascript-brunch": "> 1.0 < 1.8",

server/commons/queue.coffee

@@ -140,7 +140,7 @@ class MongoQueueClient
 
   _createMongoConnection:  ->
     @mongooseConnection = mongoose.createConnection @databaseAddress
-    @mongooseConnection.on 'error', -> log.error 'There was an error connecting to the queue in MongoDB'
+    @mongooseConnection.on 'error', -> log.error 'There was an error connecting to the queue in MongoDB' unless config.proxy
     @mongooseConnection.once 'open', -> log.info 'Successfully connected to MongoDB queue!'
 
   _generateMessageModel: ->

server_config.coffee

@@ -1,6 +1,7 @@
 config = {}
 
 config.unittest = global.testing
+config.proxy = process.env.COCO_PROXY
 
 config.tokyo = process.env.TOKYO or false
 config.saoPaulo = process.env.SAOPAULO or false

server_setup.coffee

@@ -48,7 +48,9 @@ developmentLogging = (tokens, req, res) ->
   else if status >= 300 then color = 36
   elapsed = (new Date()) - req._startTime
   elapsedColor = if elapsed < 500 then 90 else 31
-  "\x1b[90m#{req.method} #{req.originalUrl} \x1b[#{color}m#{res.statusCode} \x1b[#{elapsedColor}m#{elapsed}ms\x1b[0m"
+  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
 
 setupErrorMiddleware = (app) ->
   app.use (err, req, res, next) ->
@@ -86,6 +88,8 @@ setupExpressMiddleware = (app) ->
     express.logger.format('dev', developmentLogging)
     app.use(express.logger('dev'))
   app.use(express.static(path.join(__dirname, 'public'), maxAge: 0))  # CloudFlare overrides maxAge, and we don't want local development caching.
+  
+  setupProxyMiddleware app # TODO: Flatten setup into one function. This doesn't fit its function name.
   app.use(useragent.express())
 
   app.use(express.favicon())
@@ -216,6 +220,7 @@ exports.setupLogging = ->
   logging.setup()
 
 exports.connectToDatabase = ->
+  return if config.proxy
   database.connect()
 
 exports.setupMailchimp = ->
@@ -230,3 +235,18 @@ exports.setExpressConfigurationOptions = (app) ->
   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://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)
+      next()