attachment

image

Overview

Wraps Google's cloud storage lib allowing easy saving and lazy resizing of images upon request using appengine. This library was created to allow for each personal code re-use when uploading images to GCS and was not intended to be super flexible.

No tests have been written yet, so use at your own risk.

Usage

image provides methods to obtain reader and writer methods.

Examples

Note: Error handling is omitted in the examples below

Read

reader, err := image.NewReader(ctx, "filename.jpg")
defer reader.Close()
var b []bytes
count, err := reader.Read(b)

Write

writer, err := image.NewWriter(ctx, "filename.jpg", "image/jpeg")
defer writer.Close()
count, err := writer.Write(dataFromRequest)

ResizedURL

http.HandleFunc("/images", func(w http.ResponseWriter, r *http.Request) {
    c := appengine.NewContext(r)
    name := r.URL.Query().Get("name")       // GCS file name
    w := r.URL.Query().Get("width")
    h := r.URL.Query().Get("height")

    width, err := strconv.Atoi(w)
    height, err := strconv.Atoi(h)

    url, err := image.ResizedURL(ctx, name, width, height)
    http.Redirect(w, r, url, http.StatusMovedPermanently)
})