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 TelemetryUtil = require('sb_telemetry_util')
var telemetry = new TelemetryUtil()
var fs = require('fs')
var configUtil = require('sb-config-util')

const contentProvider = require('sb_content_provider_util')
var contentMetaProvider = require('./contentMetaFilter')
// TODO below configuration should to be refactored in a seperate file

const contentProviderConfigPath = path.join(__dirname, '/config/contentProviderApiConfig.json')
var contentProviderApiConfig = JSON.parse(fs.readFileSync(contentProviderConfigPath))
const telemtryEventConfig = JSON.parse(fs.readFileSync(path.join(__dirname, 'config/telemetryEventConfig.json')))

var reqDataLimitOfContentUpload = '50mb'

const port = process.env.sunbird_content_service_port ? process.env.sunbird_content_service_port : 5000
const defaultChannel = process.env.sunbird_default_channel || 'sunbird'
const telemetryBaseUrl = process.env.sunbird_telemetry_service_local_url ? process.env.sunbird_telemetry_service_local_url : 'http://telemetry-service:9001/'
globalEkstepProxyBaseUrl = process.env.sunbird_content_plugin_base_url ? process.env.sunbird_content_plugin_base_url : 'https://qa.ekstep.in'

const contentRepoBaseUrl = process.env.sunbird_content_repo_api_base_url || 'https://qa.ekstep.in/api'
const contentRepoApiKey = process.env.sunbird_content_repo_api_key

const learnerServiceLocalBaseUrl = process.env.sunbird_learner_service_local_base_url
  ? process.env.sunbird_learner_service_local_base_url
  : 'http://learner-service:9000'

const searchServiceBaseUrl = process.env.sunbird_search_service_api_base_url || 'https://qa.ekstep.in/api/search'
const dialRepoBaseUrl = process.env.sunbird_dial_repo_api_base_url || 'https://qa.ekstep.in/api'
const pluginRepoBaseUrl = process.env.sunbird_plugin_repo_api_base_url || 'https://qa.ekstep.in/api'
const dataServiceBaseUrl = process.env.sunbird_data_service_api_base_url || 'https://qa.ekstep.in/api'

const searchServiceApiKey = process.env.sunbird_search_service_api_key
const dialRepoApiKey = process.env.sunbird_dial_repo_api_key
const pluginRepoApiKey = process.env.sunbird_plugin_repo_api_key
const dataServiceApiKey = process.env.sunbird_data_service_api_key

const whiteListedChannelList = process.env.sunbird_content_service_whitelisted_channels
const blackListedChannelList = process.env.sunbird_content_service_blacklisted_channels

const producerId = process.env.sunbird_environment + '.' + process.env.sunbird_instance + '.content-service'

configUtil.setContentProviderApi(contentProviderApiConfig.API)
configUtil.setConfig('CONTENT_REPO_BASE_URL', contentRepoBaseUrl)
configUtil.setConfig('TELEMETRY_BASE_URL', telemetryBaseUrl)
configUtil.setConfig('CONTENT_REPO_AUTHORIZATION_TOKEN', 'Bearer ' + contentRepoApiKey)
configUtil.setConfig('LEARNER_SERVICE_LOCAL_BASE_URL', learnerServiceLocalBaseUrl)
configUtil.setConfig('DIALCODE_GENERATE_MAX_COUNT', 20000)
configUtil.setConfig('CONTENT_UPLOAD_REQ_LIMIT', reqDataLimitOfContentUpload)
configUtil.setConfig('SEARCH_SERVICE_BASE_URL', searchServiceBaseUrl)
configUtil.setConfig('DIAL_REPO_BASE_URL', dialRepoBaseUrl)
configUtil.setConfig('PLUGIN_REPO_BASE_URL', pluginRepoBaseUrl)
configUtil.setConfig('DATA_SERVICE_BASE_URL', dataServiceBaseUrl)
configUtil.setConfig('SEARCH_SERVICE_AUTHORIZATION_TOKEN', 'Bearer ' + searchServiceApiKey)
configUtil.setConfig('DIAL_REPO_AUTHORIZATION_TOKEN', 'Bearer ' + dialRepoApiKey)
configUtil.setConfig('PLUGIN_REPO_AUTHORIZATION_TOKEN', 'Bearer ' + pluginRepoApiKey)
configUtil.setConfig('DATA_SERVICE_AUTHORIZATION_TOKEN', 'Bearer ' + dataServiceApiKey)

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) {