相关疑难解决方法(0)

我正在尝试在S3中处理上传的文件.由于getObject是异步主函数在处理完成之前结束,因此AWS在3-4秒内杀死lambda.

更糟糕的是,处理方法中还包含异步操作 - 它会进行http调用.

在高级别,我的代码看起来像:

exports.handler = function(event, context) {
    // Get the object from the event and show its content type
    var bucket = event.Records[0].s3.bucket.name;
    var key = event.Records[0].s3.object.key;
    var params = {
        Bucket: bucket,
        Key: key
    };
    s3.getObject(params, function(err, data) {
        if (err) {
             ...
        } else {
            processFile(data.Body.toString(), 0);
            console.log("ok");
        }
    });
    //need to wait here till processFile is done
};

processFile = function(content, start) {
  ... build url to call
  http.get(url, function(res) {  
    console.log("Got …

我在使用一些node.js代码时遇到了一些问题,我将其放入AWS Lambda.我需要做几个异步调用,虽然第一个是我期望的行为,但lambda函数在第二个调用完成之前终止.

返回值为null,这让我认为lambda正在触及它的隐式回调,但是我认为它不应该这样做,而有一个尚未解决的承诺.

码:

exports.handle = async function(event, context) {
  var AWS = require("aws-sdk");

  AWS.config.update({
    region: "eu-west-1",
    endpoint: "dynamodb.eu-west-1.amazonaws.com"
  });

  var docClient = new AWS.DynamoDB.DocumentClient();
  console.log("Scanning Catalogue...");

  var params = {
    TableName : "Catalogue"
  };

  await docClient.scan(params).promise().then(function (data) {
    console.log("Scan succeeded.");
    data.Items.forEach(function (item) {
      //console.log(item.url);
      checkIfUpdateRequired(item);
    })
  })
}

async function checkIfUpdateRequired (catalogueItem) {
  var request = require("request-promise");
  console.log("Getting " + catalogueItem.url);

  await request(catalogueItem.url).then(function(response) {
    console.log(response.statusCode);
    console.log(response.headers['content-type']);
  });

}

日志输出:

START RequestId: 634a55b7-6258-11e8-9f18-6b300c3b5de1 Version: $LATEST
2018-05-28T09:20:44.425Z    634a55b7-6258-11e8-9f18-6b300c3b5de1    Scanning Catalogue...
2018-05-28T09:20:45.446Z …

我有一个非常简单的 lambda 函数（nodeJS），它将接收到的事件放入 kinesis 流中。这是源代码：

    'use strict';

    const AWS = require('aws-sdk');
    const kinesis = new AWS.Kinesis({apiVersion: '2013-12-02'});

    exports.handler = async (event, context, callback) => {
        let body = JSON.parse(event.body);
        let receptionDate = new Date().toISOString();
        let partitionKey = "pKey-" + Math.floor(Math.random() * 10);

        // Response format needed for API Gateway
        const formatResponse = (status, responseBody) => {
            return {
                statusCode: status,
                headers: { "Content-Type": "application/json" },
                body: JSON.stringify(responseBody)
            }
        }

        // body.events is an array of events. Just add the reception …