@contentacms/contentajs/lib/helpers/app.js

A nodejs server that proxies to Contenta CMS and holds custom code.

"use strict";

/**
 * Base application definition.
 */
const _ = require('lodash');

const bodyParser = require('body-parser');

const config = require('config');

const express = require('express');

const cacheControl = require('../middlewares/cacheControl');

const copyToRequestObject = require('../middlewares/copyToRequestObject');

const customCors = require('../middlewares/customCors');

const errorHandler = require('../middlewares/errorHandler');

const healthcheck = require('../routes/healthcheck');

const proxyHandler = require('../routes/proxyHandler');

const {
  initSubrequests
} = require('../routes/subrequests');

const app = express();
app.disable('x-powered-by'); // Enable etags.

app.enable('etag');
app.set('etag', 'strong');
const jsonApiPrefix = `/${_.get(process, 'env.jsonApiPrefix')}`;
const cmsHost = config.get('cms.host'); // Initialize the request object with valuable information.

app.use(copyToRequestObject({
  jsonApiPrefix,
  cmsHost
})); // Add headers.

app.use(customCors); // Healthcheck is a special endpoint used for application monitoring.

app.get('/healthcheck', healthcheck); // Set cache control header.

app.use(cacheControl); // Proxy for the JSON API server in Contenta CMS.

app.use(jsonApiPrefix, bodyParser.json({
  type: 'application/vnd.api+json'
})); // Try to load from cache, then fallback to the CMS.

app.use(jsonApiPrefix, proxyHandler);
initSubrequests(app); // Fallback error handling. If there is any unhandled exception or error,
// catch them here to allow the app to continue normally.

app.use(errorHandler);
module.exports = app;