chore(server): Convert PromiseContainer to object and remove (#3401)

initializeMimeTypes.

lib/middleware/common.js

@@ -4,7 +4,6 @@
 'use strict'
 
 const mime = require('mime')
-const _ = require('lodash')
 const parseRange = require('range-parser')
 const Buffer = require('safe-buffer').Buffer
 const log = require('../logger').create('web-server')
@@ -100,14 +99,6 @@ function setHeavyCacheHeaders (response) {
   response.setHeader('Cache-Control', 'public, max-age=31536000')
 }
 
-function initializeMimeTypes (config) {
-  if (config && config.mime) {
-    _.forEach(config.mime, (value, key) => {
-      mime.define({ [key]: value }, true)
-    })
-  }
-}
-
 class PromiseContainer {
   constructor () {
     this.promise = null
@@ -127,5 +118,4 @@ exports.PromiseContainer = PromiseContainer
 exports.createServeFile = createServeFile
 exports.setNoCacheHeaders = setNoCacheHeaders
 exports.setHeavyCacheHeaders = setHeavyCacheHeaders
-exports.initializeMimeTypes = initializeMimeTypes
 exports.serve404 = serve404

lib/web-server.js

@@ -5,7 +5,7 @@ const http = require('http')
 const https = require('https')
 const path = require('path')
 const connect = require('connect')
-const Promise = require('bluebird')
+const mimeType = require('mime')
 
 const common = require('./middleware/common')
 const runnerMiddleware = require('./middleware/runner')
@@ -28,15 +28,16 @@ function createCustomHandler (customFileHandlers, config) {
 createCustomHandler.$inject = ['customFileHandlers', 'config']
 
 function createFilesPromise (emitter, fileList) {
-  const filesPromise = new common.PromiseContainer()
-
   // Set an empty list of files to avoid race issues with
   // file_list_modified not having been emitted yet
-  filesPromise.set(Promise.resolve(fileList.files))
-
-  emitter.on('file_list_modified', (files) => filesPromise.set(Promise.resolve(files)))
+  let files = fileList.files
+  emitter.on('file_list_modified', (filesParam) => { files = filesParam })
 
-  return filesPromise
+  return {
+    then (...args) {
+      return Promise.resolve(files).then(...args)
+    }
+  }
 }
 
 function createServeStaticFile (config) {
@@ -50,7 +51,8 @@ function createServeFile (config) {
 createServeFile.$inject = ['config']
 
 function createWebServer (injector, config) {
-  common.initializeMimeTypes(config)
+  const { mime = {} } = config
+  mimeType.define({ ...mime }, true)
 
   const proxyMiddlewareInstance = injector.invoke(proxyMiddleware.create)