--- a/etwist/server.py	Thu Apr 28 17:36:04 2011 +0200
+++ b/etwist/server.py	Thu Apr 28 19:42:19 2011 +0200
@@ -86,6 +86,10 @@
         # root directory or as a data subdirectory. XXX (adim) : why
         # that ?
         self.putChild('fckeditor', FCKEditorResource(self.config, ''))
+        self._defineChildResources()
+
+    def _defineChildResources(self):
+        self.putChild(self.config.instance_md5_version(), self)
 
     def getChild(self, path, request):
         if not path:
@@ -133,6 +137,9 @@
       etc.
 
     """
+    def _defineChildResources(self):
+        pass
+
     def render(self, request):
         # XXX: Don't provide additional resource information to error responses
         #
@@ -156,8 +163,6 @@
         self.putChild('static', NoListingFile(config.static_directory))
         self.putChild('fckeditor', FCKEditorResource(self.config, ''))
         self.putChild('data', DataLookupDirectory(self.config, ''))
-        self.putChild('data%s' % config.instance_md5_version(),
-                      LongTimeExpiringFile(self.config, ''))
 
     def init_publisher(self):
         config = self.config

--- a/web/webconfig.py	Thu Apr 28 17:36:04 2011 +0200
+++ b/web/webconfig.py	Thu Apr 28 19:42:19 2011 +0200
@@ -300,19 +300,14 @@
         if not (self.repairing or self.creating):
             self.global_set_option('base-url', baseurl)
         httpsurl = self['https-url']
+        datadir_path = 'data/' if self.debugmode else 'data/%s/' % self.instance_md5_version()
         if httpsurl:
             if httpsurl[-1] != '/':
                 httpsurl += '/'
                 if not self.repairing:
                     self.global_set_option('https-url', httpsurl)
-            if self.debugmode:
-                self.https_datadir_url = httpsurl + 'data/'
-            else:
-                self.https_datadir_url = httpsurl + 'data%s/' % self.instance_md5_version()
-        if self.debugmode:
-            self.datadir_url = baseurl + 'data/'
-        else:
-            self.datadir_url = baseurl + 'data%s/' % self.instance_md5_version()
+            self.https_datadir_url = httpsurl + datadir_path
+        self.datadir_url = baseurl + datadir_path
 
     def _build_ui_properties(self):
         # self.datadir_url[:-1] to remove trailing /

--- a/web/webctl.py	Thu Apr 28 17:36:04 2011 +0200
+++ b/web/webctl.py	Thu Apr 28 19:42:19 2011 +0200
@@ -32,6 +32,12 @@
 from cubicweb.toolsutils import Command, CommandHandler, underline_title
 
 
+try:
+    from os import symlink as linkdir
+except ImportError:
+    from shutil import copytree as linkdir
+
+
 class WebCreateHandler(CommandHandler):
     cmdname = 'create'
 
@@ -87,6 +93,8 @@
                 os.makedirs(dest_resource)
             resource_dir, resource_path = config.locate_resource(resource)
             copy(osp.join(resource_dir, resource_path), dest_resource)
+        # handle md5 version subdirectory
+        linkdir(dest, osp.join(dest, config.instance_md5_version()))
         print ('You can use apache rewrite rule below :\n'
                'RewriteRule ^/data/(.*) %s/$1 [L]' % dest)