问Symfony将任意数据设置为匿名访问者会话。

EN

public function dummyAction(Request $request)
{
    # …
    $session = $request->getSession();
    $my_datas = $session->get('my_key');
    # …

firewalls:
    apisignup:
        pattern: api/signup
        anonymous: ~
    api:
        pattern: /api/
        provider: usr
        stateless: true
        lexik_jwt: ~

GET http://192.168.0.5/app_dev.php/en/api/signup

### SERVER SIDE
/**
 * @Route( "/signup", name="api_signup")
 * @Method( {"GET","POST"} )
 */
public function signupAction( Request $request )
{
    $session = $this->get('session');
    if ( $request->isMethod('POST') ) {
        $datas = $request->request->all();
        return new JsonResponse([
            'received' => $datas['captcha']
            ,'captcha' => var_export($session->get('captcha'), true)
        ]);
    }
    $session->set('captcha','foobar');
    return new JsonResponse(['challenge' => 'foobar']);
}

### CLIENT SIDE
$.ajax({
    url:'http://192.168.0.100/app_dev.php/en/api/signup'
    ,method: 'get'
    ,success : function(datas){
        // datas.challenge && $('#captcha').html(datas.challenge) &&
        $.ajax({
            url:'http://192.168.0.100/app_dev.php/en/api/signup'
            ,method: 'post'
            ,data: {
                captcha: 'foobar' // prompt("Captcha ?")
                // ...
            }
        });
    }
});