didil / gcf-go-image-resizer

Go Image Resizer Cloud Function

Go Image Resizer Cloud Function

Pure Go Image Resizer function, deployable to Google Cloud Functions, using the disintegration/imaging package

Medium article: Image Resizing with Go and Cloud Functions

Original gopher image:

Resized gopher image:

Example gopher image generated using gopherize.me

Usage

https://{gcf-endpoint}/ResizeImage?url={url}&height={height}&width={width}

• url: url of the image to resize
• height: height of the output image in pixels
• width: width of the output image in pixels

if width or height is missing, the aspect ratio is preserved

Deploying

$ gcloud functions deploy ResizeImage --runtime go111 --trigger-http

Local testing

There is an http server included in cmd/server.go allowing you to test locally

$ export GO111MODULE=on
$ go get -u
$ go run cmd/server/server.go

Todo

• Add tests
• Cache input images
• Cache output images