152 lines
4.8 KiB
JavaScript
152 lines
4.8 KiB
JavaScript
const path = require('path')
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const bodyParser = require('body-parser')
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const cookieParser = require('cookie-parser')
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const express = require('express')
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const logger = require('morgan')
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const querystring = require('querystring')
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const helmet = require('helmet')
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// Load environment variables using dotenv
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require('dotenv').config({ path: 'variables.env' })
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const helpers = require('./helpers')
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const { translate, initializeTranslations } = require('./i18n/i18n')
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const breadcrumb = require('./lib/breadcrumb')
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const { updateCookie } = require('./lib/cookies')
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const settings = require('./lib/settings')
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const routes = require('./routes/index')
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const { getSpace } = require('./services/contentful')
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const { catchErrors } = require('./handlers/errorHandlers')
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const SETTINGS_NAME = 'theExampleAppSettings'
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const app = express()
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// View engine setup
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app.set('views', path.join(__dirname, 'views'))
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app.set('view engine', 'pug')
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app.use(logger('dev'))
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app.use(helmet())
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app.use(bodyParser.json())
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app.use(bodyParser.urlencoded({ extended: true }))
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app.use(cookieParser())
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app.use(express.static(path.join(__dirname, 'public')))
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// Force all requests on production to be served over https
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app.use(function (req, res, next) {
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if (req.headers['x-forwarded-proto'] !== 'https' && process.env.NODE_ENV === 'production') {
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const secureUrl = 'https://' + req.hostname + req.originalUrl
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res.redirect(302, secureUrl)
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}
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next()
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})
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// Set our application settings based on environment variables or query parameters
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app.use(settings)
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// Make data available for our views to consume
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app.use(catchErrors(async function (request, response, next) {
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response.locals.baseUrl = `${request.protocol}://${request.headers.host}`
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// Get enabled locales from Contentful
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response.locals.locales = [{code: 'en-US', name: 'U.S. English'}]
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response.locals.currentLocale = response.locals.locales[0]
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// Inject custom helpers
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response.locals.helpers = helpers
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// Make query string available in templates to render links properly
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const cleanQuery = helpers.cleanupQueryParameters(request.query)
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const qs = querystring.stringify(cleanQuery)
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response.locals.queryString = qs ? `?${qs}` : ''
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response.locals.queryStringSettings = response.locals.queryString
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response.locals.query = request.query
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response.locals.currentPath = request.path
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// Initialize translations and include them on templates
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initializeTranslations()
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response.locals.translate = translate
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// Set active api based on query parameter
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const apis = [
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{
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id: 'cda',
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label: translate('contentDeliveryApiLabel', response.locals.currentLocale.code)
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},
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{
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id: 'cpa',
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label: translate('contentPreviewApiLabel', response.locals.currentLocale.code)
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}
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]
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// Set currently used api
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response.locals.currentApi = apis
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.find((api) => api.id === (request.query.api || 'cda'))
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next()
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}))
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// Test space connection and attach space related data for views if possible
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app.use(catchErrors(async function (request, response, next) {
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// Catch misconfigured space credentials and display settings page
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try {
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const space = await getSpace()
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// Update credentials in cookie when space connection is successful
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updateCookie(response, SETTINGS_NAME, response.locals.settings)
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// Get available locales from space
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response.locals.locales = space.locales
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const defaultLocale = response.locals.locales
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.find((locale) => locale.default)
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if (request.query.locale) {
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response.locals.currentLocale = space.locales
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.find((locale) => locale.code === request.query.locale)
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}
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if (!response.locals.currentLocale) {
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response.locals.currentLocale = defaultLocale
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}
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// Creates a query string which adds the current credentials to links
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// To other implementations of this app in the about modal
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helpers.updateSettingsQuery(request, response, response.locals.settings)
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} catch (error) {
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if ([401, 404].includes(error.response.status)) {
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// If we can't connect to the space, force the settings page to be shown.
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response.locals.forceSettingsRoute = true
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} else {
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throw error
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}
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}
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next()
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}))
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app.use(breadcrumb())
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// Initialize the route handling
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// Check ./routes/index.js to get a list of all implemented routes
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app.use('/', routes)
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// Catch 404 and forward to error handler
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app.use(function (request, response, next) {
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const err = new Error(translate('error404Route', response.currentLocale))
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err.status = 404
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next(err)
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})
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// Error handler
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app.use(function (err, request, response, next) {
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// Set locals, only providing error in development
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response.locals.error = request.app.get('env') === 'development' ? err : {}
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response.locals.error.status = err.status || 500
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response.locals.title = 'Error'
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// Render the error page
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response.status(err.status || 500)
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response.render('error')
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})
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module.exports = app
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