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为什么 Symfony HTTP Client 遇到错误时无法访问响应内容,而是抛出异常?

我想使用 Symfony HttpClient 发出请求从 OAUTH 服务器检索用户信息,但在遇到错误响应时无法直接获取响应,因为客户端抛出异常。

我的用户提供者:

    public function loadUserByUsername($username)
    {
        try {
            $response = $this->httpClient->request(
                'GET',
                $this->baseUrl . '/userinfo',
                [
                    'headers' => [
                        'Accept' => 'application/json',
                        'Content-Type' => 'application/json'
                    ],
                    'auth_bearer' => $username
                ]
            );

            var_dump($response->toArray());die;

        } catch (\Exception $e) {
            var_dump($e->getMessage());die;
            throw new UsernameNotFoundException($e->getMessage());
        }
    }
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当我调用$response->toArray()or时$response->getContent(),会引发异常,并且我在 Postman 上收到以下错误消息

<pre class='xdebug-var-dump' dir='ltr'>
<small>/var/www/html/backend/src/Security/Provider/KeycloakUserProvider.php:50:</small><small>string</small> <font color='#cc0000'>'HTTP/2 401  returned for &quot;https://oauth_server/userinfo&quot;.'</font> <i>(length=127)</i>
</pre>
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浏览器收到的响应示例:

{"error":"invalid_request","error_description":"Token not provided"}
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为什么我无法通过调用直接访问响应$response->toArray()?

php error-handling symfony symfony-http-client

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