Refactored get_temp_dir

bugfixes export_metadata

cps/uploader.py

@@ -18,12 +18,12 @@
 
 import os
 import hashlib
-from tempfile import gettempdir
 from flask_babel import gettext as _
 
 from . import logger, comic, isoLanguages
 from .constants import BookMeta
 from .helper import split_authors
+from .file_helper import get_temp_dir
 
 log = logger.create()
 
@@ -249,10 +249,7 @@ def get_magick_version():
 
 
 def upload(uploadfile, rar_excecutable):
-    tmp_dir = os.path.join(gettempdir(), 'calibre_web')
-
-    if not os.path.isdir(tmp_dir):
-        os.mkdir(tmp_dir)
+    tmp_dir = get_temp_dir()
 
     filename = uploadfile.filename
     filename_root, file_extension = os.path.splitext(filename)