PHP Image Reverse Proxy

Route::get('/external_resource', function(\Illuminate\Http\Request $request){
    $resource = $request->get("resource");

    $options  = array('http' => array('user_agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36'));
    $context  = stream_context_create($options);
    $f = file_get_contents($resource, false, $context);

    $finfo = new finfo(FILEINFO_MIME);

    $contenttype = $finfo->buffer($f);
    header("Content-Type: " . $contenttype); //HTTP 1.1

    echo $f;
});