ember-fastboot

#!/usr/bin/env node
'use strict';

/* eslint-env node */
const FastBootAppServer = require('fastboot-app-server');
const ExpressHTTPServer = require('fastboot-app-server/src/express-http-server');
const parseArgs = require('minimist');
const express = require('express');
const { URL } = require('url');
const enforce = require('express-sslify');

// Provide a title to the process in `ps`
process.title = 'ember-fastboot-server';

let argOptions = {
  default: { port: 3000, host: '::' }
};

let options = parseArgs(process.argv.slice(2), argOptions);
let distPath = options._[0];

if (!distPath) {
  console.error(
    `You must call ember-fastboot with the path of a fastboot-dist directory:
     ember-fastboot fastboot-dist`
  );
  process.exit(1);
}

const serverOptions = {
  port: options.port,
  distPath,
  gzip: false // Let Fastly take care of compression, reducing load on the fastboot
};

const httpServer = new ExpressHTTPServer(serverOptions);

const app = httpServer.app;

app.use(
  enforce.HTTPS({
    trustProtoHeader: true,
    trustXForwardedHostHeader: true
  })
);

app.use(
  express.static(distPath, {
    setHeaders(res, path) {
      if (!path.endsWith('index.html')) {
        res.setHeader('Cache-Control', 'public, max-age=365000000, immutable');
      }
      res.removeHeader('X-Powered-By');
    }
  })
);

/** We rewrite the 307 location header into a relativeURL so that our special setup is handled */
app.use(function(req, res, next) {

  const originalSendFn = res.send;

  res.send = function() {
    if (res.hasHeader('location')) {
      let originalLocation = res.getHeader('location');

      // FastBoot broke us once by removing the protocol so adding a check for safety
      if (originalLocation.startsWith('//')) {
        originalLocation = `http:${originalLocation}`;
      }

      let relativeURL = '/ember/2.14/namespaces/Ember';

      try {
        relativeURL = new URL(originalLocation).pathname;
      } catch (e) {
        console.log(`Original location value: ${originalLocation}`);
        console.log(e);
      }

      res.setHeader('location', relativeURL);
      arguments[0] = arguments[0].replace(new RegExp(originalLocation, 'g'), relativeURL);
    }
    originalSendFn.apply(res, arguments);
  };

  res.removeHeader('X-Powered-By');
  next();
});

let server = new FastBootAppServer(Object.assign({ httpServer }, serverOptions));

server.start();