python - 403 权限被拒绝从 PubSub 访问 AutoML

Question

我正在尝试使用 Python 使用 Google Cloud Platform AutoML 构建应用程序。我的整体代码流程如下所示:

用户交互-->数据发送到PubSub-->回调调用我的AutoML-->结果

调用 pubsub 的代码片段如下所示:

blob=blob+bytes(doc_type,'utf-8')
        publisher.publish(topic,blob)
        future=subscriber.subscribe(subscription,callback=callback)
        #flash("The object is "+future,'info')
        try:
            future.result()
        except Exception as ex:
            subscriber.close()

在 PubSub 回调中:

def callback(message):
     new_message=message.data
     display_name,score=predict_value(new_message,"modelID","projectid",'us-central1')
     message.ack()

我的 predict_value 获取 model_id、project id 和计算 region 并执行预测。

当我直接调用 predict_value 而不使用 PubSub 时，它工作正常。如果我这样做，我会收到以下错误:

google.api_core.exceptions.PermissionDenied: 403 Permission 'automl.models.predict' denied on resource 'projects/projectID/locations/us-central1/models/' (or it may not exist).

请帮我解决问题

Answer 1

非常感谢您的所有回复。我刚刚使用下面的代码片段示例修复了该问题

def receive_messages_synchronously(project, subscription_name):
"""Pulling messages synchronously."""
# [START pubsub_subscriber_sync_pull]
# project           = "Your Google Cloud Project ID"
# subscription_name = "Your Pubsub subscription name"
subscriber = pubsub_v1.SubscriberClient()
subscription_path = subscriber.subscription_path(
    project, subscription_name)

# Builds a pull request with a specific number of messages to return.
# `return_immediately` is set to False so that the system waits (for a
# bounded amount of time) until at lease one message is available.
response = subscriber.pull(
    subscription_path,
    max_messages=3,
    return_immediately=False)

ack_ids = []
for received_message in response.received_messages:
    print("Received: {}".format(received_message.message.data))
    ack_ids.append(received_message.ack_id)

# Acknowledges the received messages so they will not be sent again.
subscriber.acknowledge(subscription_path, ack_ids)
# [END pubsub_subscriber_sync_pull]

原因是创建的订阅使用了拉取请求。我猜使用的回调方法概念主要用于“推送”，这可能是因为我没有提供端点和 token 来发布消息。希望我的猜测是正确的。也让我知道您的看法。