带有输出上下文的Dialogflow响应使PHP/Symfony服务器崩溃

TL；DR

当Dialogflow发送带有输出上下文的响应时，我的PHP/Symfony服务器崩溃，但当响应没有任何输出上下文时工作正常。 为什么会这样？如何防止服务器崩溃

某些上下文

{
  "queryText": "hey",
  "action": "input.welcome",
  "parameters": {},
  "fulfillmentText": "Salutations !",
  "fulfillmentMessages": [
    {
      "text": {
        "text": [
          "Salutations !"
        ]
      },
      "lang": "fr"
    }
  ],
  "intent": {
    "id": "<id>",
    "displayName": "Default Welcome Intent",
    "priority": 500000,
    "events": [
      "WELCOME"
    ],
    "action": "input.welcome",
    "messages": [
      {
        "text": {
          "text": [
            "Hi! How are you doing?",
            "Hello! How can I help you?",
            "Good day! What can I do for you today?",
            "Greetings! How can I assist?"
          ]
        },
        "lang": "en"
      },
      {
        "text": {
          "text": [
            "Salut !",
            "Bonjour !",
            "Salutations !",
            "Bienvenue !"
          ]
        },
        "lang": "fr"
      }
    ]
  },
  "intentDetectionConfidence": 1,
  "languageCode": "fr",
  "slotfillingMetadata": {
    "allRequiredParamsPresent": true
  },
  "id": "<id>",
  "sessionId": "<id>",
  "timestamp": "2019-07-15T07:41:28.778Z",
  "source": "agent",
  "webhookStatus": {
    "webhookEnabledForAgent": true
  },
  "agentEnvironmentId": {
    "agentId": "<id>",
    "cloudProjectId": "<id>"
  }
}

{
  "queryText": "aide",
  "parameters": {},
  "fulfillmentText": "<long text>",
  "fulfillmentMessages": [
    {
      "text": {
        "text": [
          "<long text>"
        ]
      },
      "lang": "fr"
    }
  ],
  "intent": {
    "id": "<id>",
    "displayName": "Help",
    "priority": 500000,
    "messages": [
      {
        "text": {
          "text": [
            "<long text>"
          ]
        },
        "lang": "fr"
      }
    ]
  },
  "intentDetectionConfidence": 1,
  "languageCode": "fr",
  "slotfillingMetadata": {
    "allRequiredParamsPresent": true
  },
  "id": "<id>",
  "sessionId": "<id>",
  "timestamp": "2019-07-15T13:05:25.255Z",
  "source": "agent",
  "webhookStatus": {
    "webhookEnabledForAgent": true
  },
  "agentEnvironmentId": {
    "agentId": "<id>",
    "cloudProjectId": "<id>"
  }
}

我在做一个老项目，是一个几个月前离开公司的同事做的。 该项目使用Dialogflow和PHP/Symfony服务器创建聊天机器人。 早在一月份，这个项目运行得很好，但是当我上周尝试测试它时，我发现我们的服务器已经从主机上无可挽回地删除了。 我重新加载并重新安装了服务器代码，但我不能100%确定备份代码与托管代码完全相同

正确的行为

我向服务器发送“嘿”

服务器将消息传输到Dialogflow

Dialogflow确定意图为“欢迎”

Dialogflow向服务器发回“问候语”

我得到的回答是“敬礼”

错误行为

我向服务器发送“帮助”

服务器将消息传输到Dialogflow

Dialogflow确定目的是“帮助”

Dialogflow将“[一些长文本]”发送回服务器

服务器崩溃并返回一般错误500

如果我发送一个类似“诸如此类”的请求，那么默认的回退意图也是如此

差异

<?php

namespace AppBundle\Controller;

use Ramsey\Uuid\Uuid;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Google\Cloud\Dialogflow\V2\SessionsClient;
use Google\Cloud\Dialogflow\V2\TextInput;
use Google\Cloud\Dialogflow\V2\QueryInput;

class DefaultController extends Controller
{
    /**
     * @Route("/messenger", name="homepage")
     *
     */
    public function indexAction(Request $request)
    {
        return $this->render('@App/messenger.twig', array());
    }

    /**
     * @param Request $request
     *
     * @Route("/messenger/call/{intent}", options={"expose"=true}, name="call_assistant")
     * @throws \Google\ApiCore\ValidationException
     * @throws \Google\ApiCore\ApiException
     * @throws \Exception
     */
    public function callAssistantAction(Request $request, $intent) {
        $sessionDialogFlow = $this->get('session')->get('dialogFlow_session');
        if ($sessionDialogFlow === null) {
            $sessionDialogFlow = Uuid::uuid4()->toString();
            $this->get('session')->set('dialogFlow_session', $sessionDialogFlow);
        }

        $sessionClient = new SessionsClient(array(
            'credentials' => realpath($this->getParameter('kernel.root_dir'). "/../web/authentDialogFlow.json")
        ));

        $session = $sessionClient->sessionName("<my session name>", $sessionDialogFlow);
        $textInput = new TextInput();
        $textInput->setText($intent);
        $textInput->setLanguageCode('fr-FR');

        $queryInput = new QueryInput();
        $queryInput->setText($textInput);

        $response = $sessionClient->detectIntent($session, $queryInput); // <- this line is where the crash happens
        $queryResult = $response->getQueryResult();
        $fulfillmentText = $queryResult->getFulfillmentText();

        return new JsonResponse(array("response" => $fulfillmentText));
    }
}

欢迎意图不提供输出上下文，也不重置上下文。 帮助意图确实提供了输出上下文。 回退意图不提供输出上下文，但会重置上下文

我验证过，如果我提供了带有欢迎意图的输出上下文，服务器就会崩溃，如果我从帮助意图中删除了输出上下文，一切都正常

问题

这个项目是怎么回事？为什么输出上下文会使我的服务器崩溃？如何修复它？

当然，我不能从意图中删除输出上下文

代码

<?php

namespace AppBundle\Controller;

use Ramsey\Uuid\Uuid;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Google\Cloud\Dialogflow\V2\SessionsClient;
use Google\Cloud\Dialogflow\V2\TextInput;
use Google\Cloud\Dialogflow\V2\QueryInput;

class DefaultController extends Controller
{
    /**
     * @Route("/messenger", name="homepage")
     *
     */
    public function indexAction(Request $request)
    {
        return $this->render('@App/messenger.twig', array());
    }

    /**
     * @param Request $request
     *
     * @Route("/messenger/call/{intent}", options={"expose"=true}, name="call_assistant")
     * @throws \Google\ApiCore\ValidationException
     * @throws \Google\ApiCore\ApiException
     * @throws \Exception
     */
    public function callAssistantAction(Request $request, $intent) {
        $sessionDialogFlow = $this->get('session')->get('dialogFlow_session');
        if ($sessionDialogFlow === null) {
            $sessionDialogFlow = Uuid::uuid4()->toString();
            $this->get('session')->set('dialogFlow_session', $sessionDialogFlow);
        }

        $sessionClient = new SessionsClient(array(
            'credentials' => realpath($this->getParameter('kernel.root_dir'). "/../web/authentDialogFlow.json")
        ));

        $session = $sessionClient->sessionName("<my session name>", $sessionDialogFlow);
        $textInput = new TextInput();
        $textInput->setText($intent);
        $textInput->setLanguageCode('fr-FR');

        $queryInput = new QueryInput();
        $queryInput->setText($textInput);

        $response = $sessionClient->detectIntent($session, $queryInput); // <- this line is where the crash happens
        $queryResult = $response->getQueryResult();
        $fulfillmentText = $queryResult->getFulfillmentText();

        return new JsonResponse(array("response" => $fulfillmentText));
    }
}

---

经过几天的低迷之后，我发现我的服务器缺少
google/protobuf
所需的PHP扩展
bcmath
。我在我的
php.ini
中启用了它，一切正常

您可以找到有关Github问题的更多信息：