Bolt\Canonical::onRequest PHP Method

    public function onRequest(GetResponseEvent $event)
    {
        if (!$this->override) {
            return;
        }
        $override = $this->override;
        // Prepend scheme if not included so parse_url doesn't choke.
        if (strpos($override, 'http') !== 0) {
            $override = 'http://' . $override;
        }
        $parts = parse_url($override);
        // Only override scheme if it's an upgrade to https.
        // i.e Don't do: https -> http
        if (isset($parts['scheme']) && $parts['scheme'] === 'https') {
            $this->requestContext->setScheme($parts['scheme']);
        }
        if (isset($parts['host'])) {
            $this->requestContext->setHost($parts['host']);
        }
    }