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我在Lambda函数上从S3 AWS服务获得了acccess denied错误.

这是代码:

// dependencies
var async = require('async');
var AWS = require('aws-sdk');
var gm = require('gm').subClass({ imageMagick: true }); // Enable ImageMagick integration.

exports.handler = function(event, context) {
    var srcBucket = event.Records[0].s3.bucket.name;
    // Object key may have spaces or unicode non-ASCII characters.
    var key = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, " "));
/*
{
    originalFilename: <string>,
    versions: [
        {
            size: <number>,
            crop: [x,y],
            max: [x, y],
            rotate: <number>
        }
    ]
}*/
    var fileInfo;
    var dstBucket = "xmovo.transformedimages.develop";
    try {
        //TODO: Decompress and …