[Using Sakai] Internet Explorer Downloading files problem

[Dave Ross]

Yes - what's your frontend webserver? I know that IIS adds no-cache
headers which cause this bug with IE when accessing downloadable files
via. SSL.

Apache and Tomcat Standalone webserver(s) should not exhibit this behavior.


On 8/24/09, Matthew Jones <jonespm at umich.edu> 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>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
>> >
>> >
>> > On 8/24/09 11:23 AM, "Laura McCord" <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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