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A image cache server for transfer HTTP image to HTTPS in Heroku
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Godeps Fixed godep Oct 1, 2017
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Procfile Update Jun 6, 2019
imgcache_test.go Support PNG Jun 26, 2019
main.go Support PNG Jun 26, 2019

img-cache-server: A web image trasfer to HTTPS link

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How to use it

  • "https://YOUR_ADDR/url? + Your_Http_Img_Address": Return a id of image cache. (Img_Cache_ID)
  • "https://YOUR_ADDR/img? + Img_Cache_ID.jpg": Cache image content.
  • "https://YOUR_ADDR/go? + Your_Http_Img_Address": Provide https image on-fly, it may take a while if your image size is large.

So you can easily to cache any HTTP image and forward to HTTPS if you hosted on Heroko.

Enjoy it.

Installation and Usage


Sample code how to use this server.

var ImgSrv string = "YOUR_DEPLOY_ADDRESS"

func getSecureImageAddress(oriAdd string) string {
	eURL := url.QueryEscape(oriAdd)
	imgGetUrl := fmt.Sprintf("%surl?%s", ImgSrv, eURL)
	log.Println("eURL:", eURL, " url:", imgGetUrl, " ImgApi:", ImgSrv)

	response, err := http.Get(imgGetUrl)
	if err != nil {
		log.Println("Error while downloading:", err)
		return ""
	defer response.Body.Close()

	if response.StatusCode != 200 {
		return ""

	totalBody, err := ioutil.ReadAll(response.Body)
	if err != nil {
		log.Println("Error while parsing:", err)
		return ""
	log.Println("Got data:", string(totalBody))
	return fmt.Sprintf("%simgs?%s.jpg", ImgSrv, string(totalBody))


Inspired by


Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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