duplicate path variable parsing removed

main.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"math/rand"
 	"net/http"
+	"net/url"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -79,10 +80,13 @@ func GetAllHandler(w http.ResponseWriter, r *http.Request) {
 }
 
 func GetFileHandler(w http.ResponseWriter, r *http.Request) {
-	vars := mux.Vars(r)
-	file := vars["file"]
+	fileName, err := url.QueryUnescape(mux.Vars(r)["file"])
+	if err != nil {
+		InternalServerError(w, err)
+		return
+	}
 
-	http.ServeFile(w, r, filepath.Join(LibraryPath, ".songs", file))
+	http.ServeFile(w, r, filepath.Join(LibraryPath, ".songs", fileName))
 }
 
 func GetPlaylistHandler(w http.ResponseWriter, r *http.Request) {
@@ -140,8 +144,13 @@ func GetAllFilesHandler(w http.ResponseWriter, r *http.Request) {
 }
 
 func GetEncodeFileHandler(w http.ResponseWriter, r *http.Request) {
-	fileName := mux.Vars(r)["file"]
-	format := mux.Vars(r)["format"]
+	vars := mux.Vars(r)
+	format := vars["format"]
+	fileName, err := url.QueryUnescape(vars["file"])
+	if err != nil {
+		InternalServerError(w, err)
+		return
+	}
 
 	inputFilePath := filepath.Join(LibraryPath, ".songs", fileName)
 	outputFilePath := filepath.Join(os.TempDir(), fmt.Sprintf("%d.%s", rand.Int(), format))