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AWS Lambda Image Resizer

This is the code for a simple AWS Lambda function that resizes images on demand based on a origin URL set by the env FILE_HOST.

The function will fetch the image from $FILE_HOST/images/[file], where file is grabbed from the file query param and the resize based on an optional width.

Deploy

  • Run:
docker-compose run --rm web npm i
  • Zip index.js and node_modules and upload to AWS Lambda

Keep in mind

  • For now, images are always looked for in png, which means a request for www.lambda_host.com?file=myimage.jpg will be fetched from $FILE_HOST/images/myimage.png
  • If a request is made for www.lambda_host.com?file=myimage.webp, the function will fetch $FILE_HOST/images/myimage.png and return an image converted to webp