diff --git a/deluge/common.py b/deluge/common.py
index d5b848947..2ca04a782 100644
--- a/deluge/common.py
+++ b/deluge/common.py
@@ -368,5 +368,19 @@ def create_magnet_uri(infohash, name=None, trackers=[]):
             uri = uri + "&tr=" + t
 
     return uri
-    
 
+def get_path_size(path):
+    """Returns the size in bytes of 'path'.  If path does not exist, then -1 is
+    returned."""
+    if not os.path.exists(path):
+        return -1
+
+    if os.path.isfile(path):
+        return os.path.getsize(path)
+
+    dir_size = 0
+    for (p, dirs, files) in os.walk(path):
+        for file in files:
+            filename = os.path.join(p, file)
+            dir_size += os.path.getsize(filename)
+    return dir_size
diff --git a/deluge/core/core.py b/deluge/core/core.py
index dccb2754b..cf8e0bf03 100644
--- a/deluge/core/core.py
+++ b/deluge/core/core.py
@@ -641,6 +641,11 @@ class Core(
         """Returns True if we have established incoming connections"""
         return self.session.status().has_incoming_connections
 
+    def export_get_path_size(self, path):
+        """Returns the size of the file or folder 'path' and -1 if the path is
+        unaccessible (non-existent or insufficient privs)"""
+        return deluge.common.get_path_size(path)
+        
     ## Queueing functions ##
     def export_queue_top(self, torrent_ids):
         log.debug("Attempting to queue %s to top", torrent_ids)