Resizes and/or blurs images on the fly using Amazon S3, AWS Lambda, and Amazon API Gateway.
First install serverless with npm i -g serverless and install all the node
modules with npm i.
npm install for the sharp package has to occur on the same platform as the
runtime, since it's building binaries. This can be done with Docker.
[source]
rm -rf node_modules/sharp
docker run -v "$PWD":/var/task lambci/lambda:build-nodejs6.10 npm install
After that's done deploy with serverless deploy. This will also output the
URL of the function.
The deploy will also create a AWS role for the lambda function. Just give this role the read rights for S3 and you're set.
Calling the endpoint with the bucket and image name will return the original image.
https://whatever.amazonaws.com/dev/process-image?bucket=bucketName&file=fancy-image.jpg
You can also define height and width in pixels and blur the wanted sigma.
https://whatever.amazonaws.com/dev/process-image?bucket=bucketName&file=fancy-image.jpg&height=200&blur=8