Why empty POST in YII2 after reinstall?

Question

Yii

We developed our own api for mobile applications, which works based on post requests, but after reinstalling the project on a new server, Yii::$app->request->post() always returns an empty value. At the same time, Yii::$app->request->getRawBody() contains a value, but I would not want to rewrite all api.

Tell me what could be the problem and in which direction to dig? Thanks in advance.

Sending via mobile app or post via PHPStorm's RestClient. Returns emptiness always.

public function behaviors()
    {
        return [
            'access' => [
                'class' => AccessControl::class,
                'only' => ['logout', 'signup'],
                'rules' => [
                    [
                        'actions' => ['login'],
                        'allow' => true,
                        'roles' => ['?'],
                    ],
                    [
                        'actions' => ['login'],
                        'allow' => true,
                        'roles' => ['@'],
                    ],
                ],
            ],
            'verbs' => [
                'class' => VerbFilter::class,
                'actions' => [
                    'login' => ['post', 'get'],
                    'token' => ['post', 'get'],
                    'logout' => ['post', 'get'],
                ],
            ],
        ];
    }

public function beforeAction($action) {
        $this->enableCsrfValidation = false;
        return parent::beforeAction($action);
    }

 public function actionLogin()
    {
        return Yii::$app->request->post("username");
    }

Answer 1

Try reinstalling Yii2 again in the correct order, it worked for me.
https://www.yiiframework.com/doc/guide/2.0/ru/star...

Answer 2

Add a JsonParser parser to the request component.
For application/json requests, $_POST will be populated with JSON data automatically.

'components' => [
    'request' => [
        'csrfParam' => '_csrf-api',
        'parsers' => [
            'application/json' => [
                'class' => \yii\web\JsonParser::class,
                'asArray' => true,
            ],
        ],
    ],
// ...

Those. if the input is the following:

{
    "name": "Nick"
}

that $name = Yii::$app->request->post('name')will work.

Answer 3

Most likely, for some reason, the data came to the old server as form / data, and on the new server they began to come as application / json.
Why this could happen, I have no idea.
I would patch Yii::$app->request->post() as a quick fix so that it returns data received from Yii::$app->request->getRawBody() and then think further.