image-server is a simple http server that accepts an image, converts it to a different format, resizes/compresses it and sends it back.

Run on CloudRun

Usage

$ docker pull kkty/image-server
$ docker run -d -p 8080:8080 kkty/image-server

$ curl "http://localhost:8080?quality=30&width=100&height=200" \
  -X POST \
  --data-binary '@original.png' \
  -H 'content-type:image/png' \
  -H 'accept:image/jpeg' \
  > compressed.jpg

• content-type / accept can either be image/png, image/jpeg or image/gif.
• quality can be an integer value ranging from 1 to 100.
  • It takes effect only when the output is in jpeg format, i.e. accept is set to image/jpeg.
• width and height set the size of the output image in pixels.
  • If width is set and height is not set, height will be such that the original aspect ratio will be kept, and vice versa.
  • If both of them are not set, the original size will be kept unchanged.

Notes

• The port 8080 is used as default. To change the port to listen on, set PORT environment variable.