resize

Copy and resize images using Lambda.

Max Dimension

• For this function, you'll specify the max dimension in pixels. The function will keep the images in their original width/height ratios, limiting the larger dimension to the given maximum.
• E.g. with a max dimension of 100, an 800 x 600 image will be 100 x 75, but a 200 x 400 image will be 50 x 100

Deploy with CloudFormation

Prerequisites: Node.js and AWS CLI installed

• Create an AWS Account and IAM User with the AdministratorAccess AWS Managed Policy
• Run aws configure to put store that user's credentials in ~/.aws/credentials
• Create an S3 bucket for storing the Lambda code and store its name in a shell variable with:
  • export CODE_BUCKET=bucket
• Create the S3 bucket for the resized output, store its name in shell variable:
  • export DEST_BUCKET=bucket
• Choose a name, but do NOT create the S3 bucket input comes from, store its name in shell variable:
  • export SOURCE_BUCKET=bucket
• Choose the max dimension in pixels, store it in shell variable:
  • export MAX_DIMENSION=300
• Npm install:
  • npm install
• Build:
  • npm run build
• Upload package to S3, transform the CloudFormation template:
  • npm run package
• Deploy to CloudFormation:
  • npm run deploy

Deploy from the AWS Serverless Application Repository

• Create the destination bucket
• Hit "Deploy" from the application page

Use

• Images that you put into the source bucket will be transformed, then put into the destination bucket

Links

• serverless-galleria on Github
• resize on the AWS Serverless Application Repository

License

© 2017-2023 Evan Chiu. This project is available under the terms of the MIT license.