Loakel Config Datei (config.json) eingebaut und die Parameter der Datei genutzt

config.json

@@ -0,0 +1,5 @@
+{
+    "Host":"http://127.0.0.1",
+    "Port":"8000",
+    "IMGPath":"C:\\Fotos"
+}

main.go

@@ -17,19 +17,29 @@ import (
 	"github.com/gorilla/mux"
 )
 
-var imgPath = "C:/Fotos"
+var config = readConfig("")
+
+type Configuration struct {
+	Host    string
+	Port    string
+	IMGPath string
+}
 
 // our main function
 func main() {
 
+	fmt.Println("Host: " + config.Host)
+	fmt.Println("Post: " + config.Port)
+	fmt.Println("ImgPath: " + config.IMGPath)
+
 	router := mux.NewRouter()
 	router.HandleFunc("/folder/{foldername:.*}", getFolderContent).Methods("GET")
 	router.HandleFunc("/qr/{qrlink:.*}", getQRCode).Methods("GET")
 	router.HandleFunc("/thumb/{imgname:.*}", getThumbNail).Methods("GET")
 	router.HandleFunc("/imgdl/{imgname:.*}", getImageDownload).Methods("GET")
-	router.PathPrefix("/img/").Handler(http.StripPrefix("/img/", http.FileServer(http.Dir(imgPath)))).Methods("GET")
+	router.PathPrefix("/img/").Handler(http.StripPrefix("/img/", http.FileServer(http.Dir(config.IMGPath)))).Methods("GET")
 	router.PathPrefix("/").Handler(http.FileServer(http.Dir("web"))).Methods("GET")
-	log.Fatal(http.ListenAndServe(":8000", router))
+	log.Fatal(http.ListenAndServe(":"+config.Port, router))
 
 }
 
@@ -37,8 +47,8 @@ func getFolderContent(w http.ResponseWriter, r *http.Request) {
 
 	params := mux.Vars(r)
 	pFolder := params["foldername"]
-	fmt.Println(path.Join(imgPath, pFolder))
+	fmt.Println(path.Join(config.IMGPath, pFolder))
-	files, err := ioutil.ReadDir(path.Join(imgPath, pFolder))
+	files, err := ioutil.ReadDir(path.Join(config.IMGPath, pFolder))
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -80,9 +90,9 @@ func getThumbNail(w http.ResponseWriter, r *http.Request) {
 	pIMGName := params["imgname"]
 
 	// Das Thumbnail soll nur generiert werden wenn es noch nicht existiert
-	if !fileExists(imgPath + "/" + pIMGName + ".thumb.jpg") {
+	if !fileExists(config.IMGPath + "/" + pIMGName + ".thumb.jpg") {
 		//  Originaldatei öffnen, welche angefragt wird
-		src, err := imaging.Open(imgPath + "/" + pIMGName)
+		src, err := imaging.Open(config.IMGPath + "/" + pIMGName)
 		if err != nil {
 			log.Fatalf("failed to open image: %v", err)
 		}
@@ -90,7 +100,7 @@ func getThumbNail(w http.ResponseWriter, r *http.Request) {
 		// Foto auf 200px skalieren
 		src = imaging.Resize(src, 200, 0, imaging.NearestNeighbor)
 
-		err = imaging.Save(src, imgPath+"/"+pIMGName+".thumb.jpg")
+		err = imaging.Save(src, config.IMGPath+"/"+pIMGName+".thumb.jpg")
 		if err != nil {
 			log.Fatalf("failed to save image: %v", err)
 		}
@@ -99,7 +109,7 @@ func getThumbNail(w http.ResponseWriter, r *http.Request) {
 		png.Encode(w, src)
 	} else {
 
-		src, err := imaging.Open(imgPath + "/" + pIMGName + ".thumb.jpg")
+		src, err := imaging.Open(config.IMGPath + "/" + pIMGName + ".thumb.jpg")
 		if err != nil {
 			log.Fatalf("failed to open image: %v", err)
 		}
@@ -116,7 +126,7 @@ func getImageDownload(w http.ResponseWriter, r *http.Request) {
 	pIMGName := params["imgname"]
 
 	//  Originaldatei öffnen, welche angefragt wird
-	src, err := imaging.Open(imgPath + "/" + pIMGName)
+	src, err := imaging.Open(config.IMGPath + "/" + pIMGName)
 	if err != nil {
 		log.Fatalf("failed to open image: %v", err)
 	}
@@ -138,3 +148,17 @@ func fileExists(filename string) bool {
 	}
 	return !info.IsDir()
 }
+
+func readConfig(filename string) *Configuration {
+	// initialize conf with default values.
+	conf := &Configuration{Host: "http://127.0.0.1", Port: "8000", IMGPath: "C:\\Fotos"}
+
+	b, err := ioutil.ReadFile("./config.json")
+	if err != nil {
+		return conf
+	}
+	if err = json.Unmarshal(b, conf); err != nil {
+		return conf
+	}
+	return conf
+}