Redirection from HTTPS to HTTP. Doesn't have option for base url.

Hi,

When Drupal8 site is SSL enabled we normally enable HTTPS redirects in .htaccess. So all the HTTP requests are redirected to HTTPS.

In our case we have a load balancer in which this wont have a HTTP listener. Thus .htaccess doesn't help. When a new content gets created at "https://baseurl/node/add/page" on submit it gets redirected to "http://baseurl/node/1". To resolve this $_SERVER['HTTPS'] = 'on'; is added to setting.php. i.e this fix all the form redirects.

Still the internal drupal redirects are getting changed from HTTPS to HTTP.

For example:

The redirection when we hit "https://baseurl/search" in a new drupal 8 instance will get redirected to "http://baseurl/search/node" because the web server returns this. And in our case this "http://baseurl/search/node" will get blocked at the Load Balancer itself, As i said earlier this wont have a HTTP listener only HTTPS is allowed.

When I checked, the constructor of Class RequestContext at vendor/symfony/routing has the following code,

public function __construct($baseUrl = '', $method = 'GET', $host = 'localhost', $scheme = 'http', $httpPort = 80, $httpsPort = 443, $path = '/', $queryString = '')
    {
        $this->setBaseUrl($baseUrl);
        $this->setMethod($method);
        $this->setHost($host);
        $this->setScheme($scheme);
        $this->setHttpPort($httpPort);
        $this->setHttpsPort($httpsPort);
        $this->setPathInfo($path);
        $this->setQueryString($queryString);
    }

You can see the $scheme at the arguments which will have the value HTTP only, if the arguments is not passed. The same class has a function to set the scheme as follows.

public function setScheme($scheme)
    {
        $this->scheme = strtolower($scheme);

        return $this;
    }

I found couple of places in Drupal core where an object created for RequestContext Class without any arguments passed thus it sets the $scheme as http.

\Drupal\Core\Path\PathValidator.php [Line number 156 & 160]

$initial_request_context = $router->getContext() ? $router->getContext() : new RequestContext();

$request_context = new RequestContext();

\Drupal\Core\Routing\NullGenerator.php [Line number 24]

$this->context = new RequestContext();

\Drupal\Core\Routing\UrlGenerator.php [Line number 88]

$this->context = new RequestContext();

\Drupal\Core\Routing\UrlMatcher.php [Line number 37]

$this->context = new RequestContext();

Is there any workaround done to resolve this.