[Building Sakai] IMS Common Cartridge import (Also IMS CP import)

[Steve Swinsburg]

It is my understanding that the max upload size is applied in the RequestFilter via:

org.apache.commons.fileupload.servlet.ServletFileUpload.setSizeMax(uploadMax);

There are ways to get around this on a per-webapp basis by supplying some init-params to the RequestFilter config in the webapp's web.xml (see Javadocs if interested) but looking at the sakai-site-manage-tool it is just a standard RequestFilter configuration so the value from sakai.properties should be being used. That said, Site Info aggregates a number of webapps into one so the one that is used for the IMS CP import might be in a different context.

OIf course you could just try to upload a package larger than the size you have configured and see what happens, then you'll be sure :)

cheers,
Steve

On 06/07/2010, at 1:34 AM, Adam Marshall wrote:

> we think the limit is tested further up the chain than CHS but aren't sure. 
> 
> adam
> 
> | -----Original Message-----
> | From: Mark Norton [mailto:markjnorton at earthlink.net]
> | Sent: 05 July 2010 15:18
> | To: Adam Marshall
> | Cc: sakai-dev at collab.sakaiproject.org
> | Subject: Re: [Building Sakai] IMS Common Cartridge import (Also IMS CP
> | import)
> | 
> | I'm not quite sure what you are referring to when you say "site info".
> | I'm also not sure where the limits are tested.  Obviously CHS tests the
> | limits, but the actual testing may be in deeper, as part of the file
> | upload method used.  I was using RSF and the Apache commons upload
> | package.  Generally HTTP doesn't care
> | 
> | - Mark
> | 
> | Adam Marshall wrote:
> | > thanks Mark.
> | >
> | > Can I just confirm that your understanding is that the upload limit
> | applies to site info as well as resources?
> | >
> | > adam
> | >
> | > | -----Original Message-----
> | > | From: Mark Norton [mailto:markjnorton at earthlink.net]
> | > | Sent: 05 July 2010 14:20
> | > | To: Adam Marshall
> | > | Cc: sakai-dev at collab.sakaiproject.org
> | > | Subject: Re: [Building Sakai] IMS Common Cartridge import (Also IMS
> | CP
> | > | import)
> | > |
> | > | The work was done on software not posted to Sakai svn, so no patch.
> | > | Sorry.  On the server side, when you have the IO stream to the
> | incoming
> | > | file, read using buffered IO stream, write to a temp file.  Temp
> | file
> | > | can then be used as needed.
> | > |
> | > | - Mark
> | > |
> | > | Adam Marshall wrote:
> | > | > do you have a patch for this?
> | > | >
> | > | > adam
> | > | >
> | > | > | -----Original Message-----
> | > | > | From: Mark Norton [mailto:markjnorton at earthlink.net]
> | > | > | Sent: 05 July 2010 13:57
> | > | > | To: Adam Marshall
> | > | > | Cc: sakai-dev at collab.sakaiproject.org
> | > | > | Subject: Re: [Building Sakai] IMS Common Cartridge import (Also
> | IMS
> | > | CP
> | > | > | import)
> | > | > |
> | > | > | I ran into file upload memory issues in some of my past
> | projects.
> | > | The
> | > | > | best workaround around I came up with was to buffer the I/O to
> | a
> | > | temp
> | > | > | file.  Not always a fast solution, it does seem to work even on
> | > | large
> | > | > | file sizes.
> | > | > |
> | > | > | - Mark Norton
> | > | > |
> | > | > | Adam Marshall wrote:
> | > | > | > Dear Community
> | > | > | >
> | > | > | > We've just implemented a facility to allow IMS Content
> | Packages
> | > | to be
> | > | > | uploaded via the "Import from file" in Site Info.
> | > | > | >
> | > | > | > I have some questions:
> | > | > | >
> | > | > | > 1/ does site info obey the "60 meg upload limit" (ie, the max
> | > | upload
> | > | > | limit set in properties)?  For IMS CC or CP courses with video
> | this
> | > | > | will be highly restrictive.
> | > | > | >
> | > | > | > 2/ We think that file uploads are read into memory so, if we
> | > | > | increased the upload limit to (say) 200MB this would possibly
> | cause
> | > | > | performance problems. Is there a way to get the uploads to load
> | to
> | > | disc
> | > | > | instead? Does anybody know how to do this?
> | > | > | >
> | > | > | > Is there any other useful info that could be passed along to
> | us?
> | > | > | >
> | > | > | > adam
> | > | > | >
> | > | > | > PS Our IMS CP upload facility works quite well! We will make
> | > | > | available to commuinity once we've tidied up the last few
> | remaining
> | > | > | issues.
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