README
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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
Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func EncodeImageToJpg ¶
encode image to jpeg
func FetchAndResizeImage ¶
func FetchAndResizeImage(p *ResizerParams) (*image.Image, error)
fetch the image from provided url and resize it
func ResizeImage ¶
func ResizeImage(w http.ResponseWriter, r *http.Request)
Cloud Function entry point
Types ¶
type ResizerParams ¶
type ResizerParams struct {
// contains filtered or unexported fields
}
struct containing the initial query params
func NewResizerParams ¶
func NewResizerParams(url string, height int, width int) ResizerParams
ResizerParams factory
func ParseQuery ¶
func ParseQuery(r *http.Request) (*ResizerParams, error)
parse/validate the url params
Source Files
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