Laravel
Cross Domain Request

Invoering

Soms hebben we een domeinoverschrijdend verzoek nodig voor onze API's in laravel. We moeten de juiste headers toevoegen om het interdomeinverzoek succesvol af te ronden. We moeten er dus voor zorgen dat de headers die we toevoegen nauwkeurig moeten zijn, anders worden onze API's kwetsbaar. Om headers toe te voegen moeten we middleware in laravel toevoegen die de juiste headers toevoegt en de verzoeken doorstuurt.

CorsHeaders

<?php

namespace laravel\Http\Middleware;

class CorsHeaders
{
  /**
   * This must be executed _before_ the controller action since _after_ middleware isn't executed when exceptions are thrown and caught by global handlers.
   *
   * @param $request
   * @param \Closure $next
   * @param string [$checkWhitelist] true or false Is a string b/c of the way the arguments are supplied.
   * @return mixed
   */
  public function handle($request, \Closure $next, $checkWhitelist = 'true')
  {
    if ($checkWhitelist == 'true') {
      // Make sure the request origin domain matches one of ours before sending CORS response headers.
      $origin = $request->header('Origin');
      $matches = [];
      preg_match('/^(https?:\/\/)?([a-zA-Z\d]+\.)*(?<domain>[a-zA-Z\d-\.]+\.[a-z]{2,10})$/', $origin, $matches);

      if (isset($matches['domain']) && in_array($matches['domain'], ['yoursite.com']) {
        header('Access-Control-Allow-Origin: ' . $origin);
        header('Access-Control-Expose-Headers: Location');
        header('Access-Control-Allow-Credentials: true');

        // If a preflight request comes then add appropriate headers
        if ($request->method() === 'OPTIONS') {
          header('Access-Control-Allow-Methods: GET, POST, PUT, OPTIONS, DELETE, PATCH');
          header('Access-Control-Allow-Headers: ' . $request->header('Access-Control-Request-Headers'));
            // 20 days
          header('Access-Control-Max-Age: 1728000'); 
        }
      }
    } else {
      header('Access-Control-Allow-Origin: *');
    }

    return $next($request);
  }
}