Optimized FTP fs by caching directory structure

ChangeLog

@@ -26,4 +26,4 @@
     * New FS implementation:
         * FTPFS:        access a plain old FTP server
         * ReadOnlyFS:   a WrapFS that makes an fs read-only
-
+    * Added cache_hint method to base.py

fs/base.py

@@ -144,6 +144,16 @@ class FS(object):
         if not getattr(self, 'closed', True):
             self.close()
 
+    def cache_hint(self, enabled):
+        """Recommends the use of caching. Implementations are free to use or
+        ignore this value.
+
+        :param enabled: If True the implementation is permitted to cache directory
+        structure / file info.
+
+        """
+        pass
+
     def close(self):
         self.closed = True
 
@@ -289,6 +299,39 @@ class FS(object):
         """
         raise UnsupportedError("list directory")
 
+    def listdirinfo(self, path="./",
+                          wildcard=None,
+                          full=False,
+                          absolute=False,
+                          dirs_only=False,
+                          files_only=False):
+
+        """Retrieves an iterable of paths and path info (as returned by getinfo) under
+        a given path.
+
+        :param path: Root of the path to list
+        :param wildcard: Filter paths that mach this wildcard
+        :dirs_only: Return only directory paths
+        :files_only: Return only files
+
+        :raises ResourceNotFoundError: If the path is not found
+        :raises ResourceInvalidError: If the path exists, but is not a directory
+
+        """
+
+        def get_path(p):
+            if not full:
+                return pathjoin(path, p)
+
+        return [(p, self.getinfo(get_path(p)))
+                    for p in self._listdir( path,
+                                            widcard=wildcard,
+                                            full=full,
+                                            absolute=absolute,
+                                            dirs_only=dirs_only,
+                                            files_only=files_only )]
+
+
 
     def _listdir_helper(self, path, entries,
                               wildcard=None,

fs/browsewin.py

@@ -35,7 +35,7 @@ class InfoFrame(wx.Frame):
         self.list_ctrl.SetColumnWidth(1, 300)
 
         for key in keys:
-            self.list_ctrl.Append((key, repr(info.get(key))))
+            self.list_ctrl.Append((key, str(info.get(key))))
 
 
 

fs/tests/test_ftpfs.py

@@ -72,7 +72,3 @@ if __name__ == "__main__":
     ftpd = ftpserver.FTPServer(address, handler)
 
     ftpd.serve_forever()
-
-
-
-