imagini/internal/api/media.go

package api

import (
	"net/http"
	"os"
	"path"

	"reichard.io/imagini/graph/model"
)

// Responsible for serving up static images / videos
func (api *API) mediaHandler(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		w.WriteHeader(http.StatusMethodNotAllowed)
		return
	}

	if path.Dir(r.URL.Path) != "/media" {
		w.WriteHeader(http.StatusMethodNotAllowed)
		return
	}

	// Acquire Width & Height Parameters
	query := r.URL.Query()
	width := query["width"]
	height := query["height"]
	_ = width
	_ = height

	// TODO: Caching & Resizing
	//  - If both, force resize with new scale
	//  - If one, scale resize proportionally

	// Pull out userID
	authContext := r.Context().Value("auth").(*model.AuthContext)
	rawUserID, _ := (*authContext.AccessToken).Get("sub")
	userID := rawUserID.(string)

	// Derive Path
	fileName := path.Base(r.URL.Path)
	folderPath := path.Join("/" + api.Config.DataPath + "/media/" + userID)
	mediaPath := path.Join(folderPath + "/" + fileName)

	// Check if File Exists
	_, err := os.Stat(mediaPath)
	if os.IsNotExist(err) {
		// TODO: Different HTTP Response Code?
		w.WriteHeader(http.StatusMethodNotAllowed)
		return
	}

	http.ServeFile(w, r, mediaPath)
}