因此，我需要创建一个lambda函数，在其中选择源存储桶中的图像并调整其大小。完成此操作后，它将调整大小后的图像放入另一个存储桶中。我一直在aws网站上关注一个教程，但是现在我需要添加功能，以便它从原始存储桶中删除原始图像。
已经通过许多不同的方式进行了尝试，但是无法正常工作。请帮助。
async.waterfall([
function download(next) {
// Download the image from S3 into a buffer.
s3.getObject({
Bucket: srcBucket,
Key: srcKey
},
next);
},
function transform(response, next) {
gm(response.Body).size(function(err, size) {
// Infer the scaling factor to avoid stretching the image unnaturally.
var scalingFactor = Math.min(
MAX_WIDTH / size.width,
MAX_HEIGHT / size.height
);
var width = scalingFactor * size.width;
var height = scalingFactor * size.height;
// Transform the image buffer in memory.
this.resize(width, height)
.toBuffer(imageType, function(err, buffer) {
if (err) {
next(err);
} else {
next(null, response.ContentType, buffer);
}
});
});
},
function upload(contentType, data, next) {
// Stream the transformed image to a different S3 bucket.
s3.putObject({
Bucket: dstBucket,
Key: dstKey,
Body: data,
ContentType: contentType
},
next);
},
function deleteOrig(err) {
s3.deleteObject({
Bucket: srcBucket,
Key: srcKey
}){
if(err) {
console.log(err);
}
}
}
], function (err) {
if (err) {
console.error(
'Unable to resize ' + srcBucket + '/' + srcKey +
' and upload to ' + dstBucket + '/' + dstKey +
' due to an error: ' + err
);
} else {
console.log(
'Successfully resized ' + srcBucket + '/' + srcKey +
' and uploaded to ' + dstBucket + '/' + dstKey
);
}
callback(null, "message");
}
);
};
在Lambda中，按照以下日志返回成功：
START RequestId: f4a00fce-c283-4801-a902-03d450db8a8d Version: $LATEST
2019-01-29T10:07:19.012Z f4a00fce-c283-4801-a902-03d450db8a8d Reading options from event:
{ Records:
[ { eventVersion: '2.0',
eventSource: 'aws:s3',
awsRegion: 'us-west-2',
eventTime: '1970-01-01T00:00:00.000Z',
eventName: 'ObjectCreated:Put',
userIdentity: { principalId: 'AIDAJDPLRKLG7UEXAMPLE' },
requestParameters: { sourceIPAddress: '127.0.0.1' },
responseElements:
{ 'x-amz-request-id': 'C3D13FE58DE4C810',
'x-amz-id-2': 'FMyUVURIY8/IgAtTv8xRjskZQpcIZ9KG4V5Wp6S7S/JRWeUWerMUE5JgHvANOjpD' },
s3:
{ s3SchemaVersion: '1.0',
configurationId: 'testConfigRule',
bucket:
{ name: 'ciansource',
ownerIdentity: { principalId: 'A3NL1KOZZKExample' },
arn: 'arn:aws:s3:::ciansource' },
object:
{ key: 'football.jpg',
size: 1024,
eTag: 'd41d8cd98f00b204e9800998ecf8427e',
versionId: '096fKKXTRTtl3on89fVO.nfljtsv6qko' } } } ] }
2019-01-29T10:07:19.281Z f4a00fce-c283-4801-a902-03d450db8a8d { AccessDenied: Access Denied
at Request.extractError (/var/runtime/node_modules/aws-sdk/lib/services/s3.js:577:35)
at Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:105:20)
at Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:77:10)
at Request.emit (/var/runtime/node_modules/aws-sdk/lib/request.js:683:14)
at Request.transition (/var/runtime/node_modules/aws-sdk/lib/request.js:22:10)
at AcceptorStateMachine.runTo (/var/runtime/node_modules/aws-sdk/lib/state_machine.js:14:12)
at /var/runtime/node_modules/aws-sdk/lib/state_machine.js:26:10
at Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:38:9)
at Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:685:12)
at Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:115:18)
message: 'Access Denied',
code: 'AccessDenied',
region: null,
time: 2019-01-29T10:07:19.279Z,
requestId: '7FDDB3FAD06B6A81',
extendedRequestId: '6N6cxCFzgupDhpukxcVHOaFECYKl/0cQx7lc40qVGYnYr2efnXarfQ9ztQ3/nU8Fu6WpRurJ7Ps=',
cfId: undefined,
statusCode: 403,
retryable: false,
retryDelay: 10.888386530079242 } 'AccessDenied: Access Denied\n at Request.extractError (/var/runtime/node_modules/aws-sdk/lib/services/s3.js:577:35)\n at Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:105:20)\n at Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:77:10)\n at Request.emit (/var/runtime/node_modules/aws-sdk/lib/request.js:683:14)\n at Request.transition (/var/runtime/node_modules/aws-sdk/lib/request.js:22:10)\n at AcceptorStateMachine.runTo (/var/runtime/node_modules/aws-sdk/lib/state_machine.js:14:12)\n at /var/runtime/node_modules/aws-sdk/lib/state_machine.js:26:10\n at Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:38:9)\n at Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:685:12)\n at Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:115:18)'
END RequestId: f4a00fce-c283-4801-a902-03d450db8a8d
REPORT RequestId: f4a00fce-c283-4801-a902-03d450db8a8d Duration: 273.72 ms Billed Duration: 300 ms Memory Size: 1024 MB Max Memory Used: 39 MB
答案 0 :(得分：0)
我可以使用它，但我没有获得我正在使用的从s3中删除权限的角色。当我添加该策略时，它便对其进行了修复。感谢所有提供帮助的人！