[LON-CAPA-users] instructor-specific loss of copy/paste in course editor

[Stuart Raeburn]

Hi,

Thanks for retrieving the value of docs.markedcopies from the user's  
session environment, and reporting it.

The issue here is that this particular user has a lockfile in:

/home/httpd/lonUsers/uiuc/<1>/<2>/<3>/<username>/nohist_courseeditor.db
which needs to be removed.

(<username> is the username, and <1>, <2>, and <3> are the first three  
characters of the username).

The escaped key which needs to be deleted from the user's  
nohist_courseeditor.db GDBM file is: paste%00locked_num

I will send you a script off-list which you can use to delete this key.

In addition, LON-CAPA 2.11.1 will contain a modification to  
/home/httpd/lib/perl/Apache/loncommon.pm to remove this key when a  
user next logs in, in the unlikely case that the usual removal of the  
lock during copying to the clipboard failed for some reason.

I have just filed bug 6765 --  
http://bugs.loncapa.org/show_bug.cgi?id=6765 to document that required  
change.


Stuart Raeburn
LON-CAPA Academic Consortium


> docs.markedcopies is indeed blank on the access server the   
> instructor logged into.  I've had her log in on a couple and it is   
> the same on both.
>
> To clarify, she is unable to copy within a course or between   
> courses.  It seems like the copied material simply isn't making it   
> to the clipboard.
>
>
> I've removed identifying data, but this is these are the entries   
> that looked like they might be relevant.
>
> docs.markedcopies =
> docs.markedcopy_cmd_ = copy
> docs.markedcopy_title_ = precipitate.problem
> docs.markedcopy_url_ = <homework_url>
> docs.exit.uiuc_<private_value> = /adm/navmaps
> docs.markedcopy_crs_ = uiuc_<private_value>
>
> Lee
>
>> -----Original Message-----
>> From: "Mills, Douglas G" <dmills at illinois.edu>
>>
>> We have not yet tried the command line procedures below (I don't have
>> command line access so am waiting for help on that) but I did have her log
>> in to MSU's server and the problem persisted for her in that environment.
>>
>> Doug
>>
>> Douglas Mills
>> Director of Instructional Technologies
>> Department of Chemistry
>> University of Illinois
>> dmills at illinois.edu
>> (217) 244-5739
>>
>>
>>
>>
>>
>>
>>
>> On 12/2/14, 2:11 PM, "Stuart Raeburn" <raeburn at msu.edu> wrote:
>>
>> >Hi Doug,
>> >
>> >Looking at the LON-CAPA code, I see that the clipboard in the Course
>> >Editor is generated by the  &print_paste_buffer() routine in
>> >/home/httpd/lib/perl/Apache/londocs.pm
>> >
>> >print_paste_buffer() will display no output if the session environment
>> >variable: $env{'docs.markedcopies'} is either undefined or empty.
>> >
>> >If you have command line access to the server hosting the user's
>> >session you can display the contents of the session environment via:
>> >
>> >/home/httpd/perl/debug/dump_db.pl -u
>> /home/httpd/lonIDs/<session>.id
>> >
>> >where <session> is the unique session ID (starts with user's username).
>> >
>> >Look for an entry for the key: docs.markedcopies (e.g. pipe output to:
>> >'grep docs.markedcopies').  The corresponding value for that key
>> >should be a list of comma-separated numbers.
>> >
>> >Log-out will remove the user's session file in /home/httpd/lonIDs.
>> >
>> >(Note: there is also a way for a user to view the contents of his/her
>> >own session file using the web browser, but that needs to be
>> >configured by the Domain Coordinator).
>> >
>> >You might also ask the instructor to log-in (or switch server) to one
>> >of the MSU servers, and see if the Course Editor clipboard is also
>> >absent for that instructor in a course, after copying one or more
>> >items in the Course Editor in a session hosted at a server in the msu
>> >domain.
>> >
>> >Stuart Raeburn
>> >LON-CAPA Academic Consortium
>> >
>> >
>> >Quoting "Mills, Douglas G" <dmills at illinois.edu>:
>> >
>> >> That's a good question and one I wasn't paying attention to at the
>> >> time. I'll try to catch up with the instructor today to double-check
>> >>  that.  Her problem though had persisted for a few days if I
>> >> understand correctly before she contacted me and on at least two
>> >> computers and two browsers on one or the other of those computers,
>> >> so it seems unlikely she'd have hit the same access server every
>> >> time. But I'll sit with her and vary the access servers today if she
>> >>  has time and report back. Thanks!
>> >>
>> >> Doug
>> >>
>> >> Douglas Mills
>> >> Director of Instructional Technologies
>> >> Department of Chemistry
>> >> University of Illinois
>> >> dmills at illinois.edu<mailto:dmills at illinois.edu>
>> >> (217) 244-5739
>> >>
>> >>
>> >> From: "H. K. Ng" <hkng at fsu.edu<mailto:hkng at fsu.edu>>
>> >> Reply-To: Discussion list for LON-CAPA users
>> >>
>> >><lon-capa-users at mail.lon-capa.org<mailto:lon-capa-users at mail.lon-
>> capa.org
>> >>>>
>> >> Date: Tuesday, December 2, 2014 at 12:42 PM
>> >> To: Discussion list for LON-CAPA users
>> >>
>> >><lon-capa-users at mail.lon-capa.org<mailto:lon-capa-users at mail.lon-
>> capa.org
>> >>>>
>> >> Subject: Re: [LON-CAPA-users] instructor-specific loss of copy/paste
>> >>  in course editor
>> >>
>> >> Hi,
>> >>
>> >> Did both logins go to the same server? Occasionally, an access
>> >> server may "act up".
>> >>
>> >> -hk
>> >>
>> >> On Tue, Dec 2, 2014 at 12:44 PM, Mills, Douglas G
>> >> <dmills at illinois.edu<mailto:dmills at illinois.edu>> wrote:
>> >> Hi All,
>> >>
>> >> I have one instructor who has lost the ability to copy content in
>> >> her course editor. I've watched her try in both Firefox and Chrome
>> >> with no results (nothing shows up where the clipboard should be
>> >> beneath the list of files).  I logged into my account on her
>> >> computer in her browser, entered her course and AM able to copy
>> >> files in the content editor. It seems to be her account
>> >> specifically.  Thoughts?  Has anyone else seen this?
>> >>
>> >> Doug
>> >>
>> >> Douglas Mills
>> >> Director of Instructional Technologies
>> >> Department of Chemistry
>> >> University of Illinois
>> >> dmills at illinois.edu<mailto:dmills at illinois.edu>
>> >> (217) 244-5739
>> >
>> >_______________________________________________
>> >LON-CAPA-users mailing list
>> >LON-CAPA-users at mail.lon-capa.org
>> >http://mail.lon-capa.org/mailman/listinfo/lon-capa-users
>>
>>
>>
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