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Internet Explorer 7 : failure to open CBFS drive files

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Posted: 07/28/2008 09:30:10
by FIQUET Olivier (Standard support level)
Joined: 06/08/2007
Posts: 3

Our CBFS implementation works fine and we manage to open files with all applications except Internet Explorer 7. It seems that IE7 asks for file info, perhaps we don't answer correctly and IE 7 aborts the read operation.
(no read are performed).

Have you already encountered this problem/behaviour ?
Thanks for your help.


Posted: 07/28/2008 09:58:33
by FIQUET Olivier (Standard support level)
Joined: 06/08/2007
Posts: 3

Is it due to security settings as my virtual drive is in Internet location ?
Posted: 07/28/2008 10:28:58
by Eugene Mayevski (EldoS Corp.)

Yes, this is somehow related to security, but this needs reproducing.
a) Can you please show a line or two of code where you create a mounting point?
b) Do I understand correctly that this happens on Vista?
c) What exactly files are opened? Are these executable files or data files or ...?

Sincerely yours
Eugene Mayevski
Posted: 07/29/2008 03:35:30
by FIQUET Olivier (Standard support level)
Joined: 06/08/2007
Posts: 3

I manage to identify the "bug". This "bug" occurs only in "network drive" mode. I made a test with our old software release based on CBFS in "removable media" mode and there's no problem to open files with IE 7.
I think that's due to Internet location versus Local network area.

a/ Here is some code

MountMedia(50000); //timeout = 50s


AddNetworkMountingPoint(m_swDrive, CStringW(GetNetworkDriveIdentifier(sTemp)), TRUE, NULL);

b/ It happens on XP too. You just need to use IE 7 to get this behaviour

c/ All kind of files, for example GIF, TXT files.
But the drag&drop folders are correctly open.

Perhaps you can transfer this problem to helpdesk with Vista thumbnails and network drive name in "save as" dialog ?

Thanks a lot
Posted: 07/29/2008 06:15:25
by Eugene Mayevski (EldoS Corp.)

Thank you for replies. I will move your last message to the helpdesk to have it assigned to the developer. Once the issue is solved, we will publish the final solution here as well as in the helpdesk.

Sincerely yours
Eugene Mayevski
Posted: 07/31/2008 00:38:33
by Volodymyr Zinin (EldoS Corp.)

I think that the problem is because the network mounting points feature has not been completely implemented yet. We are working on it.
Posted: 12/16/2008 12:50:25
by Kurt Griffiths (Standard support level)
Joined: 12/08/2008
Posts: 34

As of version v.2.1.43 I am still seeing IE7 refuse to load files from a network mounting point. It happens on Vista and XP SP3. The problems seems to be that the mounting point is not part of the trusted local intranet. Since it is in an insecure "zone", IE7 refuses to load it, and you get a "Do you want to move or copy files from this zone" prompt every time you try to copy something from the CBFS drive.

Is there a known workaround for this?

Posted: 12/16/2008 13:11:19
by Eugene Mayevski (EldoS Corp.)

Does IE7 acts in the same way for regular network drives?

Sincerely yours
Eugene Mayevski
Posted: 12/16/2008 13:32:39
by Kurt Griffiths (Standard support level)
Joined: 12/08/2008
Posts: 34

Nope. I tried a network file share as well as a locally mapped WebDAV server.
Posted: 12/16/2008 14:20:51
by Eugene Mayevski (EldoS Corp.)

I managed to remember that this question has been asked already.

Please see this post - it contains the answer to your question.

Callback File System 3 (expected in January) will include completely implemented network redirector so the drives will look like regular network drives. This redirector is already complete and it's possible that we will make a beta version of CBFS 3 during December. You will get free upgrade to CBFS 3 of course.

Sincerely yours
Eugene Mayevski
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