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Bug 5719 Size limits for File Upload in Essay response.
 - Max. cumulative size for submitted files applies to total for all files submitted to a particular essayresponse item. Default is 100 MB.
 - In course context, &lonacc:get_posted_cgi() will now no longer add file contents to %env if size exceeds max. for item.
 - Additional checks in essayresponse::file_submission() will assign award as "EXCESS_FILESIZE" if total of all files being submitted for sinle essayresponse item exceed max set via
PARM.
 - Modification to $Apache::lonhomework::results{"resource.$part.$id.$which"} to now include a comma separated list of only those submitted files which passed both the filetype and size tests.

<problem>
<parameter name="uploadedfiletypes" id="11" default="doc,xls,ppt,png,jpg,jpeg,gif,txt,pdf,htm,html" type="string_fileext" description="Allowed File Extensions for Uploaded Files" />
<parameter name="maxfilesize" id="13" default="100.0" type="float_pos" description="Max. cumulative size for submitted file(s)"> 
<script type="loncapa/perl">
$weight=&EXT('resource.0.weight');
if ((!defined($weight)) || ($weight eq '')) { $weight=1; }
$awarded=&EXT('user.resource.resource.0.awarded');
$scoreformat=&EXT('resource.0.scoreformat');
if (!defined($scoreformat) || $scoreformat eq '') { $scoreformat="0f"; }
if (!defined($awarded)) {
   $display='$weight possible points.';
} else {
   $display='You have '.&format($awarded*$weight,$scoreformat).' out of '.
            $weight.' possible points.';
}
</script>
<startouttext />
<displaytitle />
$display
<instructorcomment><font color="red"><ul><li>If non-integer points are used (e.g., 3.5), make sure to change the
display format in PPRM, or the result will be displayed in rounded form.</li>
<li>To change the allowed file types for
submissions, change the "uploadedfiletypes" parameter in
PPRM.</li>
<li>To change the maximum cumulative size for submitted files for this item, modify the "maxfilesize" parameter in PPRM (The default is 100 MB).</li>
</ul></font></instructorcomment>
<endouttext />
<essayresponse id="upload">
</essayresponse>
</problem>