lampic's Introduction

Create Thumbnail using Sharp JS Library

The code here creates a resized copy of the image you upload to an s3 bucket. It triggers on an event in s3 after an upload to a specified bucket and adds the new resized image to another bucket/location in s3.

The example uses: uploads-bucket (upload location), and creates a resized copy in another bucket (resized-bucket).

Install

npm install to get the pre-requisites
then zip everything (including the node modules)
Add the lambda function and then setup IAM policy to upload, and run lambda etc.
Set ObjectCreated(All) for S3 in select Lambda (function uploaded)
Upload the zip to Lambda and test

Update Permissions

Sample Cors:

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
    <CORSRule>
        <AllowedOrigin>*</AllowedOrigin>
        <AllowedMethod>GET</AllowedMethod>
    </CORSRule>
    <CORSRule>
        <AllowedOrigin>http://localhost:4200</AllowedOrigin>
        <AllowedMethod>GET</AllowedMethod>
        <AllowedMethod>PUT</AllowedMethod>
        <AllowedMethod>POST</AllowedMethod>
        <AllowedMethod>DELETE</AllowedMethod>
        <AllowedHeader>*</AllowedHeader>
    </CORSRule>
</CORSConfiguration>

Sample Bucket Permissions:

{
	"Version": "2012-10-17",
	"Statement": [
		{
			"Sid": "AddPerm",
			"Effect": "Allow",
			"Principal": "*",
			"Action": "s3:GetObject",
			"Resource": "arn:aws:s3:::ecms/*"
		},
		{
			"Sid": "DelegateS3Access",
			"Effect": "Allow",
			"Principal": {
				"AWS": "arn:aws:iam::786462021999:root"
			},
			"Action": "s3:*",
			"Resource": [
				"arn:aws:s3:::ecms/*",
				"arn:aws:s3:::ecms"
			]
		}
	]
}

Sample Resized Permissions:

{
	"Version": "2012-10-17",
	"Statement": [
		{
			"Sid": "AddPerm",
			"Effect": "Allow",
			"Principal": "*",
			"Action": "s3:GetObject",
			"Resource": "arn:aws:s3:::ecmsresized/*"
		},
		{
			"Sid": "DelegateS3Access",
			"Effect": "Allow",
			"Principal": {
				"AWS": "arn:aws:iam::786462021999:root"
			},
			"Action": "s3:*",
			"Resource": "arn:aws:s3:::ecmsresized/*"
		}
	]
}

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