在 AWS SNS 过滤中，未知消息属性不会被忽略，这意味着您需要为所有想要匹配的属性都创建一个过滤策略。要解决这个问题，您可以通过在过滤筛选器中添加适配器来忽略未知属性。以下是一个示例代码，用于在 Node.js 和 Typescript 中过滤 SNS 消息：

import * as AWS from 'aws-sdk';
import * as SNS from "aws-sdk/clients/sns";

AWS.config.update({ region: 'us-east-1' });
const sns: SNS = new AWS.SNS({ apiVersion: '2010-03-31' });

const subscriptions: any[] = [];

function subscribeToTopic(topicArn: string, filterPolicy: object) {
   const params = {
      Protocol: 'https',
      TopicArn: topicArn,
      Attributes: {
         'FilterPolicy': JSON.stringify(filterPolicy)
      }
   };

   sns.subscribe(params, function (err, data) {
      if (err) {
         console.error(err);
      } else {
         subscriptions.push(data.SubscriptionArn);
         console.log('Subscribed to SNS topic successfully. Subscription ARN: ' + data.SubscriptionArn);
      }
   });
}

function handleSNSMessage(event: any) {
   const snsMessage = event.Records[0].Sns;
   console.log('Received SNS message: ' + JSON.stringify(snsMessage.Message));

   // Check for known message attributes
   if (snsMessage.MessageAttributes['attribute1']) {
      // Process the message
   }
   if (snsMessage.MessageAttributes['attribute2']) {
      // Process the message
   }
}

// Subscribe to the SNS Topic
const topicArn = 'arn:aws:sns:us-east-1:123456789:mytopic';
const filterPolicy = {
   "attribute1": ["value1", "value2"],
   "attribute2": "value3"
};
subscribeToTopic(topicArn, filterPolicy);

// Listen to the SNS notifications
export const snsNotificationHandler = async (event: any) => {
   console.log('Received SNS notification.');
   await handleSNSMessage(event);
};

在此示例代码中，我们首先定义了 subscribeToTopic() 函数，该函数将在 SNS Topic 上创建一个订阅并添加筛选策略。然后，我们使用 handleSNSMessage() 函数来处理接收到的消息，该函数检查 MessageAttributes 是否有已知