Folders starting with dot not displayed

[martinbocek]

Hello,
I have met a problem - IMAP folder names starting with dot (".") are not displayed in folder list. For example:
.folder/subfolder    !!!
folder/.subfolder    OK
.folder/.subfolder   !!!
Delimiter on our IMAP server (Cyrus) is "/", I have set this in my RC config.

I have gone thru source code, the problem seems to be in rcube_imap class - method list_folders_subscribed received correct list of folders from IMAP server, then sorts them using sort_folder_list method.

sort_folder_list silently throws away folders starting with dot (line 4184):

Code Select Expand


        // convert names to UTF-8 and skip folders starting with '.'
        foreach ($a_folders as $folder) {
            if ($folder[0] != '.') {
                // for better performance skip encoding conversion
                // if the string does not look like UTF7-IMAP
                $folders[$folder] = strpos($folder, '&') === false ? $folder : rcube_charset::convert($folder, 'UTF7-IMAP');
            }
        }

       // continues to work with $folders, $a_folders items not matching ($folder[0] != '.') are lost from list


I think this is not a correct behaviour. RC allows user to create new folders starting with dot, creates them on the IMAP server, but it does not display them later in list. If I disable the condition, all folders are displayed correctly.

Can someone write his oppinnion on this before I post a bug report?

Thank you

[alec]

Looks like a hack from old days where some IMAP servers were returning real hidden filesystem folders via IMAP. I think UW-IMAP may do this still. Some IMAP clients decided to hide these folders, so did Roundcube. However, IMAP RFC does not cover this and I think we could reconsider, maybe as an optional feature. For example Thunderbird does not hide such folders.

[martinbocek]

Thank for your reply. Config option like "disallow dot starting folder name" etc would be great. This should also affect new folder creation. I agree that it is a strange idea to use a dot as first symbol, but some of my users are using this.