Rework imgcache module

src/internal/imgcache/imagecache.go

@@ -1,12 +1,10 @@
 package imgcache
 
 import (
-	"bytes"
 	"errors"
 	"io"
 	"net/http"
 	"os"
-	"path/filepath"
 	"strings"
 	"sync"
 )
@@ -80,18 +78,6 @@ func (ic *ImageCache) GetImageURL(url string) (string) {
 	}
 }
 
-// Faster creation of file names
-func createFileNameFromURL(url string, key string) (string) {
-	url_stripped := strings.Split(url, "?")[0]
-	ext := filepath.Ext(url_stripped)
-
-	var buf bytes.Buffer
-	buf.WriteString(key)
-	buf.WriteString(ext)
-
-	return buf.String()
-}
-
 // Download the Image
 func (ic *ImageCache) DownloadImage(url string, filename string) (error) {
 

src/internal/imgcache/tools.go

@@ -1,43 +1,30 @@
 package imgcache
 
 import (
+	"bytes"
 	"crypto/md5"
 	"encoding/hex"
 	"io"
+	"path/filepath"
+	"strings"
 )
 
-func strToMD5(str string) string {
-  md5Hasher := md5.New()
-  md5Hasher.Write([]byte(str))
-  return hex.EncodeToString(md5Hasher.Sum(nil))
-}
-
-func indexOfString(str string, slice []string) int {
-
-  for i, v := range slice {
-    if str == v {
-      return i
-    }
-  }
-
-  return -1
-}
-
-func removeStringFromSlice(str string, slice []string) []string {
-
-  var i = indexOfString(str, slice)
-
-  if i != -1 {
-    slice = append(slice[:i], slice[i+1:]...)
-  }
-
-  return slice
-}
-
 // createIndexFromUrl will calculate the URLs md5 and will pick then only the digits within the string too create a key
 func createKeyFromUrl(url string) (string) {
   // Berechne den MD5-Hash der URL
   hasher := md5.New()
   io.WriteString(hasher, url)
   return hex.EncodeToString(hasher.Sum(nil))
 }
+
+// Faster creation of file names
+func createFileNameFromURL(url string, key string) (string) {
+	url_stripped := strings.Split(url, "?")[0]
+	ext := filepath.Ext(url_stripped)
+
+	var buf bytes.Buffer
+	buf.WriteString(key)
+	buf.WriteString(ext)
+
+	return buf.String()
+}