AutoML php PredictionServiceClient 身份验证错误

问题描述

我正在尝试将 Google AutoML 预测服务与我训练的自定义模型一起使用，但它返回以下错误：

Client error: `POST https://oauth2.googleapis.com/token` resulted in a `400 Bad Request` response:
{"error":"invalid_scope","error_description":"Invalid OAuth scope or ID token audience provided."}

我正在使用以下代码，类似于文档：

use Google\Cloud\AutoMl\V1\ExamplePayload;
use Google\Cloud\AutoMl\V1\Image;
use Google\Cloud\AutoMl\V1\PredictionServiceClient;

putenv("GOOGLE_APPLICATION_CREDENTIALS=/path/to/key.json");

$service = new PredictionServiceClient();
        try {
            $formattedname = $service->modelName('project-name','region','model');
            $content = file_get_contents($filePath); //defined in other side as the path to the photo
            $image = (new Image())->setimageBytes($content);
            $payload = (new ExamplePayload())->setimage($image);
            $params = ['score_threshold' => '0.5']; // value between 0.0 and 1.0
            $response = $service->predict($formattedname,$payload,$params);
            $annotations = $response->getPayload();
            foreach ($annotations as $annotation) {
                $spaceName = $annotation->getdisplayName();
            }
        } finally {
            $service->close();
        }

我在部署模型后尝试使用google提供的curl，结果如下：

   {
      "error": {
        "code": 401,"message": "Request had invalid authentication credentials. Expected OAuth 2 access token,login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.","status": "UNAUTHENTICATED"
      }
    }

本例中使用的代码是：

         putenv("GOOGLE_APPLICATION_CREDENTIALS=/path/to/key.json");
         $file = file_get_contents('/path/to/photo.jpg');
         $image = base64_encode($file);
         $url = "https://automl.googleapis.com/v1/projects/[project_name]/locations/[region]/models/[model]:predict";

         $curl = curl_init($url);
         curl_setopt($curl,CURLOPT_URL,$url);
         curl_setopt($curl,CURLOPT_POST,true);
         curl_setopt($curl,CURLOPT_RETURNTRANSFER,true);

         $headers = [
         "Content-Type: application/json","Authorization: Bearer $(gcloud auth application-default print-access-token)",];
         curl_setopt($curl,CURLOPT_HTTPHEADER,$headers);

         $data = '{"payload":{"image":{"imageBytes": "' . $image . '"}}}';
         curl_setopt($curl,CURLOPT_POSTFIELDS,$data);
         //for debug only!
         curl_setopt($curl,CURLOPT_SSL_VERIFYHOST,false);
         curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,false);

         $resp = curl_exec($curl);
         curl_close($curl);

我已经阅读了有关如何获取凭据的所有文档，并且都在 key.json 文件中。

有人知道我需要什么才能做出成功预测吗？提前致谢！！

解决方法

可能是因为返回了 Oauth 错误，所以 putenv("GOOGLE_APPLICATION_CREDENTIALS=/path/to/key.json"); 没有生效。相反，您可以在代码中删除它并在运行脚本之前设置环境变量。只需确保您使用的是正确的服务帐户路径即可。

export GOOGLE_APPLICATION_CREDENTIALS="/path/to/key.json"

我使用您的代码对此进行了测试，并且只添加了名称拼写。我使用了 AutoML Vision quick start 中检测花朵的数据集。

use Google\Cloud\AutoMl\V1\ExamplePayload;
use Google\Cloud\AutoMl\V1\Image;
use Google\Cloud\AutoMl\V1\PredictionServiceClient;

$filePath = '/my_file_path/red-rose.jpg';
$service = new PredictionServiceClient();
        try {
            $formattedName = $service->modelName('my-project','us-central1','my-model-id');
            $content = file_get_contents($filePath); //defined in other side as the path to the photo
            $image = (new Image())->setImageBytes($content);
            $payload = (new ExamplePayload())->setImage($image);
            $params = ['score_threshold' => '0.5']; // value between 0.0 and 1.0
            $response = $service->predict($formattedName,$payload,$params);
            $annotations = $response->getPayload();
            foreach ($annotations as $annotation) {
                    $spaceName = $annotation->getDisplayName();
                    printf('Predicted class name: %s' . PHP_EOL,$spaceName);
            }
        } finally {
            $service->close();
        }

测试：