[Using Sakai] Internet Explorer Downloading files problem

[Laura McCord]

So, I did notice that my headers do contain the problematic, "Pragma: 
no-cache & Cache-control: no-cache,max-age=0,must-revalidate". The 
article (http://support.microsoft.com/kb/316431) suggests that I remove 
the Pragma:no-cache headers, etc... since I'm using ssl. However, 
looking at the source files I see that these lines of code are in 
several files.

response.addHeader("Pragma", "no-cache");
response.addHeader("Cache-Control", "no-store, no-cache, 
must-revalidate, max-age=0, post-check=0, pre-check=0");

 Do I need to remove these lines of code from all the source files or 
are there a few that only need to be revised?

Many Thanks,
 Laura


Matthew Jones wrote:
> There are known issues with IE and certain values in headers 
> (http://support.microsoft.com/kb/316431) specifically those that alter 
> caching. Sakai doesn't add these, but some firewalls/load balancers 
> may. I would verify whether or not you're having the problem with the 
> 2.5 QA server and see what headers your server is returning for those 
> resources causing a problem.
>
> I tested with IE 7 on Vista on the QA server and didn't have any 
> problems uploading/downloading resources.
>
> http://qa5-us.sakaiproject.org/
>
> For instance, this public resource I created on this server shows the 
> following headers. According to the support bulletin, problematic ones are
> "Pragma: no-cache & Cache-control: no-cache,max-age=0,must-revalidate"
>
> curl -I -k 
> "http://qa5-us.sakaiproject.org/access/content/user/test/TESTDOC.doc"                                                                  
>
>
> HTTP/1.1 200 OK
> Date: Mon, 24 Aug 2009 16:05:31 GMT
> Server: Apache/2.2.8 (Ubuntu) mod_jk/1.2.25 PHP/5.2.4-2ubuntu5.6 with 
> Suhosin-Patch
> Set-Cookie: JSESSIONID=28572a42-3ef3-40a8-8367-5d5f577b7caa.tartar; Path=/
> Content-Disposition: attachment; filename="TESTDOC.doc"
> Accept-Ranges: none
> Content-Length: 22016
> Content-Type: application/msword
>
> On Mon, Aug 24, 2009 at 11:45 AM, Laura McCord 
> <mccordl at southwestern.edu <mailto:mccordl at southwestern.edu>> wrote:
>
>     I don't think it's the name of the file because it doesn't have any
>     special characters or spaces; WoodwardCellBioF09Lec1.ppt
>
>     Thanks,
>     Laura
>
>
>
>     Kevin Longo wrote:
>     > Hi Laura,
>     >
>     > We’ve seen this in IE when the file users are trying to download
>     files
>     > with spaces or special characters (such as a period or a pound sign)
>     > in the filename.  Because we have so many users and they’re all
>     using
>     > different browsers, office suites, and operating systems, we’ve been
>     > training users not to upload files that contain anything but alpha
>     > and/or numeric values.  So, instead of uploading “John’s Journal
>     > #1.doc”, the user would upload “JohnsJournal1.doc”.  This has
>     > alleviated many of our issues related to resources.
>     >
>     > Regards,
>     > -Kevin
>     >
>     >
>     >
>     > Kevin Longo
>     > RINET Systems Analyst
>     > 646 Camp Avenue
>     > North Kingstown, RI 02852
>     > (401) 295-9200
>     > kevin at staff.ri.net <mailto:kevin at staff.ri.net>
>     >
>     >
>     > On 8/24/09 11:23 AM, "Laura McCord" <mccordl at southwestern.edu
>     <mailto:mccordl at southwestern.edu>> wrote:
>     >
>     >     We are running a Sakai 2.5.4 and when we try to download a
>     >     resource from
>     >     Internet Explorer 7 or version 8 we get an error stating,
>     "Explorer
>     >     cannot download the requested file.  Site is unavailable.
>      Try again
>     >     later.". Downloading works perfectly fine from Firefox.
>     >
>     >     Any suggestions on how to get this fixed?
>     >
>     >     Thanks,
>     >      Laura
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