[LON-CAPA-admin] Images not showing up in student view for some questions

[Michael Dugdale]

Hi Mark,

Thanks for the quick reply.  The question I've been focusing on (there are actually several) is /res/vcu/s2bdedmo/SOL05_HS_Chemistry/SOL05_HSChem_19_Acids.problem

The associated image is /res/vcu/s2bdedmo/SOL05_HS_Chemistry/images/SOLHS05_Chemistry_19_MixingSolutionsTable.JPG

I've checked for the allow tag in the problem file on the server's filesystem:
>> <allow src="/res/vcu/s2bdedmo/SOL05_HS_Chemistry/images/SOLHS05_Chemistry_19_MixingSolutionsTable.JPG"/ >


Not trusting my eyes, I did verify that the indicated URL points to the image file, that's happily sitting in a folder w

The teacher tells me he's been having this problem from time to time… at the moment, it seems to be happening with a few vcu problems:
	/res/vcu/s2bdedmo/SOL05_HS_Chemistry/SOL05_HSChem_50_Synthesis_Reaction.problem
	/res/vcu/s2bdedmo/SOL02_HS_Chemistry/SOL02_HSChem_13_Reaction_Types.problem
are the ones I can see right now (again, it seems this has happened before with other problems)



Michael Dugdale
Co-chair (Scheduling)
Department of Physics
John Abbott College
21,275 Lakeshore Road
Ste. Anne de Bellevue, Québec
H9X 3L9, Canada
(514) 457-6610 Ext. 5888
michael.dugdale at johnabbott.qc.ca





On 2013-10-17, at 9:03 PM, Mark Lucas <lucasm at ohio.edu> wrote:

> This can happen if the problem was coded without the allow tag at the bottom.
> 
> If a problem is included in a course, a student is allowed to access it, but resources that
> are NOT included in the course cannot be accessed by students. 
> 
> The allow tag says "Also include this file in the list allowed for students"
> 
> While it may be something more complicated than this, this is definitely the first place to
> check. 
> 
> What problems are giving grief?
> 
> Mark
> 
> On Oct 17, 2013, at 8:52 PM, Michael Dugdale wrote:
> 
>> Hi,
>> 
>> Looking for some help here.  A chemistry teacher has reported a number of cases where the images associated with a problem don't show up for students.  It loads fine for course coordinators.  It's just the images that are included in the problem that are not showing up; the rest of the problem loads fine.
>> 
>> Trying to open just the image in a new tab (as student) gives the following error:
>> 
>> -----------------------------
>> LON-CAPA Access Control
>> 
>> Access  : Browse resources
>> Resource: /res/vcu/s2bdedmo/SOL05_HS_Chemistry/images/SOLHS05_Chemistry_19_MixingSolutionsTable.JPG
>> Action  : Access Denied
>> 
>> Sorry ...
>> This action is currently not authorized.
>> ------------------------------
>> 
>> I've looked in the file system, and the files are there, owner/group are www:www with permissions -rw-r--r--
>> 
>> As far as Apache logs go, I see many remarks of the form:
>> 
>> [Thu Oct 17 20:23:36 2013] [error] access to /res/vcu/s2bdedmo/SOL05_HS_Chemistry/images/SOLHS05_Chemistry_19_MixingSolutionsTable.JPG failed for 74.57.249.17, reason: Access Denied for michaeldugdale domain johnabbott access bre
>> 
>> Trying to get a sense of what's going on, I checked the problem file on the server's file system and it does, indeed have the line
>> <allow src="/res/vcu/s2bdedmo/SOL05_HS_Chemistry/images/SOLHS05_Chemistry_19_MixingSolutionsTable.JPG"/ >
>> 
>> And I've double-checked that SELINUX is disabled...
>> 
>> I'm fresh out of ideas about where to look next. Does anyone have any thoughts on where I should look?
>> 
>> Thanks in advance,
>> 
>> Michael Dugdale
>> 
>> 
>> Michael Dugdale
>> Co-chair (Scheduling)
>> Department of Physics
>> John Abbott College
>> 21,275 Lakeshore Road
>> Ste. Anne de Bellevue, Québec
>> H9X 3L9, Canada
>> (514) 457-6610 Ext. 5888
>> michael.dugdale at johnabbott.qc.ca
>> 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> LON-CAPA-admin mailing list
>> LON-CAPA-admin at mail.lon-capa.org
>> http://mail.lon-capa.org/mailman/listinfo/lon-capa-admin
> 
> -- 
> Mark Lucas 								email: lucasm at ohiou.edu
> 252D Clippinger Lab						phone: (740)597-2984
> Department of Physics and Astronomy		fax: (740)593-0433
> Ohio University
> Athens, OH 45701
> 
> _______________________________________________
> LON-CAPA-admin mailing list
> LON-CAPA-admin at mail.lon-capa.org
> http://mail.lon-capa.org/mailman/listinfo/lon-capa-admin
>