122 lines
3.0 KiB
Go
122 lines
3.0 KiB
Go
package main
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import (
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"encoding/json"
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"fmt"
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"image/png"
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"io/ioutil"
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"log"
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"net/http"
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"os"
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"path"
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"strings"
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"github.com/boombuler/barcode"
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"github.com/boombuler/barcode/qr"
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"github.com/disintegration/imaging"
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"github.com/gorilla/mux"
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)
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var StartUpPath string
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// our main function
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func main() {
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StartUpPath = "C:/Fotos" //dir
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router := mux.NewRouter()
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router.HandleFunc("/folder/{foldername:.*}", GetFolderContent).Methods("GET")
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router.HandleFunc("/qr/{qrlink:.*}", GetQRCode).Methods("GET")
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router.HandleFunc("/thumb/{imgname:.*}", GetThumbNail).Methods("GET")
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router.PathPrefix("/img/").Handler(http.StripPrefix("/img/", http.FileServer(http.Dir("C:/Fotos")))).Methods("GET")
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router.PathPrefix("/").Handler(http.FileServer(http.Dir("web"))).Methods("GET")
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log.Fatal(http.ListenAndServe(":8000", router))
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}
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func GetFolderContent(w http.ResponseWriter, r *http.Request) {
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params := mux.Vars(r)
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pFolder := params["foldername"]
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fmt.Println(path.Join(StartUpPath, pFolder))
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files, err := ioutil.ReadDir(path.Join(StartUpPath, pFolder))
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if err != nil {
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log.Fatal(err)
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}
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var dateien []string
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for _, f := range files {
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if !strings.HasSuffix(f.Name(), ".thumb.jpg") {
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dateien = append(dateien, f.Name())
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}
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}
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json.NewEncoder(w).Encode(dateien)
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}
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func GetQRCode(w http.ResponseWriter, r *http.Request) {
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// Variablen auswerten
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params := mux.Vars(r)
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pQRLink := params["qrlink"]
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// QR-Code erstellen
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qrCode, _ := qr.Encode(pQRLink, qr.M, qr.Auto)
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// Größe festlegen
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qrCode, _ = barcode.Scale(qrCode, 200, 200)
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// Datei erstellen
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file, _ := os.Create("qrcode.png")
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defer file.Close()
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// Datei ausgeben
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png.Encode(w, qrCode)
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}
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func GetThumbNail(w http.ResponseWriter, r *http.Request) {
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// Variablen auswerten
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params := mux.Vars(r)
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pIMGName := params["imgname"]
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// Das Thumbnail soll nur generiert werden wenn es noch nicht existiert
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if !fileExists(StartUpPath + "/" + pIMGName + ".thumb.jpg") {
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// Originaldatei öffnen, welche angefragt wird
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src, err := imaging.Open(StartUpPath + "/" + pIMGName)
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if err != nil {
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log.Fatalf("failed to open image: %v", err)
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}
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// Foto auf 200px skalieren
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src = imaging.Resize(src, 200, 0, imaging.NearestNeighbor)
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err = imaging.Save(src, StartUpPath+"/"+pIMGName+".thumb.jpg")
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if err != nil {
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log.Fatalf("failed to save image: %v", err)
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}
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// Datei ausgeben
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png.Encode(w, src)
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} else {
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src, err := imaging.Open(StartUpPath + "/" + pIMGName + ".thumb.jpg")
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if err != nil {
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log.Fatalf("failed to open image: %v", err)
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}
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// Datei ausgeben
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png.Encode(w, src)
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}
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}
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//--------------------------------------------------------------------------
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// Hilfsfunktionen
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//--------------------------------------------------------------------------
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func fileExists(filename string) bool {
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info, err := os.Stat(filename)
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if os.IsNotExist(err) {
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return false
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}
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return !info.IsDir()
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}
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