Lambda 函数跳过 SNS 发布调用

Question

我目前正在尝试从 AWS Lambda 发送推送通知，但在我的函数中跳过了以下代码，因为我试图在其中输出一些内容，但它没有显示。请帮助我

const AWS = require("aws-sdk");
const documentClient = new AWS.DynamoDB.DocumentClient();
const sns = new AWS.SNS();
AWS.config.region = 'ap-southeast-1'

exports.handler = async event => {
  const params = {
    TableName: "Items" // The name of your DynamoDB table
  };
  try {
    // Utilising the scan method to get all items in the table
    const data = await documentClient.scan(params).promise();
    var allItems = data.Items;
    allItems.forEach(async function (item){
        const tempItem = item;
        var endDate = new Date(tempItem.endDate);
        var today = new Date();
        today.setHours(0, 0, 0, 0);
        var currentDaysLeft = endDate - today;
        if (currentDaysLeft < 0)
        {
            currentDaysLeft = 0;
        }
        
        // convert JS date milliseconds to number of days
        currentDaysLeft = Math.ceil(currentDaysLeft / (1000 * 60 * 60 * 24)); 
        
        if (tempItem.durationLeft != currentDaysLeft){
            tempItem.durationLeft = currentDaysLeft;
        }
        
        const message =  tempItem.username + "'s " + tempItem.title + " is expiring in " + tempItem.durationLeft + " days." ;

        const msgparams = {
          Message: message,
          TopicArn: 'arn:aws:sns:ap-southeast-1:xxxxxxxxx:xxxxx'
        };
        var publishPromise = sns.publish(msgparams).promise();
        
    });
    return;
  } catch (e) {
    return {
      body: e
    };
  }
};

我已经测试过 for each 循环根据返回的项目数正确运行，并且扫描的数据确实都是正确的，但发布部分不是运行

这是我的 firebase 消息服务代码

public override void OnMessageReceived(RemoteMessage message)
        {
            base.OnMessageReceived(message);
            string messageBody = string.Empty;

            if (message.GetNotification() != null)
            {
                messageBody = message.GetNotification().Body;
            }

            // NOTE: test messages sent via the Azure portal or AWS SNS portal will be received here
            else
            {
                messageBody = message.Data.Values.First();
            }

            // convert the incoming message to a local notification
            SendLocalNotification(messageBody);
        }

Answer 1

您可以return所有的 sns 发布 promise 并将它们收集在一个数组中，然后在所有 promise 数组上使用 await。

const publishPromises = allItems.map(function (item){
......
return sns.publish(msgparams).promise();
});

await Promise.all(publishPromises);

Lambda 函数跳过 SNS 发布调用

Lambda function skipping SNS publish call

node.js

aws-lambda

amazon-sns