Changed way to get pepe links

pepeservice/main.go

@@ -12,6 +12,8 @@ type application struct {
 	errorLog *log.Logger
 	infoLog  *log.Logger
 
+	pepe_list []string
+
 	pepe_dir string
 }
 
@@ -21,44 +23,43 @@ func main() {
 	infoLog := log.New(os.Stdout, "INFO\t", log.Ldate|log.Ltime)
 	errorLog := log.New(os.Stderr, "ERROR\t", log.Ldate|log.Ltime|log.Lshortfile)
 
+	file, err := os.Open(pepe_dir)
+	if err != nil {
+		errorLog.Printf("Error opening pepe directory\n")
+		return
+	}
+
+	pepe_list, err := file.Readdirnames(0)
+	if err != nil {
+		errorLog.Printf("Error reading pepe directory file names\n")
+		return
+	}
+	file.Close()
+
 	app := &application{
-		infoLog:  infoLog,
-		errorLog: errorLog,
-		pepe_dir: pepe_dir,
+		infoLog:   infoLog,
+		errorLog:  errorLog,
+		pepe_dir:  pepe_dir,
+		pepe_list: pepe_list,
 	}
 
 	mux := http.NewServeMux()
 	mux.HandleFunc("/pepe", app.sendPepe)
 
 	app.infoLog.Printf("Starting server at :4000\n")
-	err := http.ListenAndServe(":4000", mux)
+	err = http.ListenAndServe(":4000", mux)
 	log.Fatal(err)
 
 }
 
 func (app *application) sendPepe(w http.ResponseWriter, r *http.Request) {
-	file, err := os.Open(app.pepe_dir)
-	if err != nil {
-		app.errorLog.Printf("Error opening pepe directory\n")
-		http.Error(w, "Internal Server Error", 500)
-		return
-	}
-	defer file.Close()
-
-	names, err := file.Readdirnames(0)
-	if err != nil {
-		app.errorLog.Printf("Error reading pepe directory file names\n")
-		http.Error(w, "Internal Server Error", 500)
-		return
-	}
-
 	// Random number generator
 	s := rand.NewSource(time.Now().UnixMicro())
 	rd := rand.New(s) // Init pseudorandom generator
-	number := rd.Intn(len(names))
+	number := rd.Intn(len(app.pepe_list))
 
 	baseURL := "https://cdn.nicecock.eu/pepe/1.00/"
-	URL := baseURL + names[number]
+	URL := baseURL + app.pepe_list[number]
 
 	w.Write([]byte(URL))
 }