app.js

var express = require('express')
var bodyParser = require('body-parser')
var methodOverride = require('method-override')
var http = require('http')
var path = require('path')
var cp = require('child_process')

var configUtil = require('sb-config-util')
var fs = require('fs')
var contentProviderApiConfig = JSON.parse(fs.readFileSync(__dirname + '/config/contentProviderApiConfig.json', 'utf8'))

var reqDataLimitOfContentUpload = '30mb'

const port = process.env.sunbird_content_service_port ? process.env.sunbird_content_service_port : 5000

global_content_provider_base_url = process.env.sunbird_content_provider_api_base_url ? process.env.sunbird_content_provider_api_base_url : 'https://dev.ekstep.in/api'
global_ekstep_proxy_base_url = process.env.sunbird_content_plugin_base_url ? process.env.sunbird_content_plugin_base_url : 'https://qa.ekstep.in'
global_content_provider_api_key = process.env.sunbird_content_provider_api_key || 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiI2NWU2MTUxNzdkODY0MGJkYWNmMWE4MWEwM2Y5MmNjYSJ9.yST4a-kA0K-r-86m0gx45IMTTZP0ujQnjFDEjv2wU0A'

global_learner_service_api_key = process.env.sunbird_learner_service_api_key
global_learner_service_base_url = process.env.sunbird_learner_service_base_url ? process.env.sunbird_learner_service_base_url : 'https://dev.open-sunbird.org/api'

configUtil.setContentProviderApi(contentProviderApiConfig.API)
configUtil.setConfig('BASE_URL', global_content_provider_base_url)
configUtil.setConfig('Authorization_TOKEN', 'Bearer ' + global_content_provider_api_key)
configUtil.setConfig('LEARNER_SERVICE_BASE_URL', global_learner_service_base_url)
configUtil.setConfig('LEARNER_SERVICE_AUTHORIZATION_TOKEN', 'Bearer ' + global_learner_service_api_key)

process.env.sunbird_image_storage_url = process.env.sunbird_image_storage_url
process.env.sunbird_azure_account_name = process.env.sunbird_azure_account_name
process.env.sunbird_azure_account_key = process.env.sunbird_azure_account_key
process.env.sunbird_dial_code_registry_url = process.env.sunbird_dial_code_registry_url
process.env.sunbird_cassandra_ips = process.env.sunbird_cassandra_ips || '127.0.0.1'
process.env.sunbird_cassandra_port = process.env.sunbird_cassandra_port || 9042
process.env.dial_code_image_temp_folder = 'temp'

var app = express()
const isEkStepProxyRequest = function (req) {
  let url = req.url
  const uploadAPI = configUtil.getConfig('UPLOAD_CONTENT_URI')
  const uploadUrlAPI = configUtil.getConfig('CONTENT_UPLOAD_URL_URI')
  return url && ((url.indexOf(uploadAPI) > -1 && !(url.indexOf(uploadUrlAPI) > -1)) || url.indexOf('/telemetry') > -1)
}

const bodyParserJsonMiddleware = function () {
  return function (req, res, next) {
    if (isEkStepProxyRequest(req)) {
      return next()
    } else {
      return bodyParser.json({limit: reqDataLimitOfContentUpload})(req, res, next)
    }
  }
}

app.use(bodyParserJsonMiddleware())
// app.use(bodyParser.urlencoded({
//     extended: true
// }));

app.use(methodOverride())

// Cache-Control, X-Requested-With these two headers required for upload file through fine-upload library
app.use(function (req, res, next) {
  res.header('Access-Control-Allow-Origin', '*')
  res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,PATCH,DELETE,OPTIONS')
  res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, cid, user-id, x-auth, Cache-Control, X-Requested-With, *')

  if (req.method === 'OPTIONS') {
    res.sendStatus(200)
  } else {