Question

我想使用Cloud Function从发布/订阅中提取消息。因此，我为主题设置了强制订阅。然后，我每小时都会使用Cloud Scheduler触发Cloud Function。

如果我需要使用pull，是否有更好的方法？

我已经从文档中复制了一个示例，但它引发了错误。

 TypeError: match error: could not instantiate a path template from 
 projects/projectname/subscriptions/projects/projectname/subscriptions/test at PathTemplate.match 
 (/srv/node_modules/google-gax/build/src/pathTemplate.js:82:19) at PathTemplate.render 
 (/srv/node_modules/google-gax/build/src/pathTemplate.js:118:14) at SubscriberClient.subscriptionPath 
 (/srv/node_modules/@google-cloud/pubsub/build/src/v1/subscriber_client.js:1838:57) at 
 exports.helloPubSub (/srv/index.js:22:45) at /worker/worker.js:825:24 at <anonymous> at 
 process._tickDomainCallback (internal/process/next_tick.js:229:7)

我遗漏了什么导致错误？

我复制的代码如下：

const pubsub = require('@google-cloud/pubsub');
const subClient = new pubsub.v1.SubscriberClient();

const subscriptionName = 'name_of_my_subscription';
const projectId = 'my_project_id';
const timeout = 60;



exports.helloPubSub = async (event, context) => {

const formattedSubscription = subClient.subscriptionPath(projectId, subscriptionName);

const request = {
  subscription: formattedSubscription,
  maxMessages: 10,
};

const [response] = await subClient.pull(request);

const ackIds = [];
for (const message of response.receivedMessages) {
  console.log(`Received message: ${message.message.data}`);
  ackIds.push(message.ackId);
}

 const ackRequest = {
 subscription: formattedSubscription,
 ackIds: ackIds,
};

await subClient.acknowledge(ackRequest);

};

谢谢！

Answer 1

此行出现错误信息：

const formattedSubscription = subClient.subscriptionPath(projectId, subscriptionName);

因为您的“我的姓名预订”为projects/your-project/subscriptions/subname，而不是subname：

const subscriptionName = 'name_of_my_subscription';

这就是为什么您会获得双名projects/projectname/subscriptions/的原因：

 could not instantiate a path template from 

projects/projectname/subscriptions/projects/projectname/subscriptions/test

如何从云功能中获取发布/订阅消息？

1 个答案: