Large file upload problems

[Warren Young]

I have an ASP page that needs to accept files which are typically rather 
large.  (Average 2GB +/- 1GB.)  These files ultimately need to be stored 
in a particular place in the web server's file system.  I've set it up 
so that the temp file is kept around, so that I can simply do a 
system("mv $tempfile $target") within the ASP code to move the uploaded 
file into place.

That works, but there are a number of weaknesses I've run into:

1. Since $tempfile is on the system disk and $target is on a big RAID 
array, the move incurs a lot of extra disk I/O.  Is there a way to tell 
CGI.pm or Apache::ASP to use a directory on the RAID array instead of 
/usr/tmp?

2. There seems to be no upload progress indicator, at least with 
Mozilla.  Is there a way that I can insert some code that gets run right 
after the first HTTP header on the upload gets processed, so I can pick 
off the expected file size?  If so, I could pop up a window with my own 
progress bar.

3. Something in the chain is barfing if the file is too large.  The 
limit seems to be just under 2GB.  Here's the spewage I get in the log 
for a 1.99GB file:

[Fri Apr 30 20:47:31 2004] [error] [client 172.16.0.42] Malformed
multipart
POST!!MultipartBuffer::read('MultipartBuffer=HASH(0x8b214ac)',0)
called at (eval 109) line
55!!MultipartBuffer::new('MultipartBuffer','CGI=HASH(0x8ba6b58)','---------------------------9040894219264',-2147483254,'undef')
called at (eval 107) line
4!!CGI::new_MultipartBuffer('CGI=HASH(0x8ba6b58)','---------------------------9040894219264',-2147483254,'undef')
called at (eval 106) line
3!!CGI::read_multipart('CGI=HASH(0x8ba6b58)','---------------------------9040894219264',-2147483254)
called at /usr/lib/perl5/5.8.0/CGI.pm line
415!!CGI::init('CGI=HASH(0x8ba6b58)','undef') called at
/usr/lib/perl5/5.8.0/CGI.pm line 286!!CGI::new('CGI') called at
/usr/lib/perl5/site_perl/5.8.0/Apache/ASP/Request.pm line
81!!Apache::ASP::Request::new('Apache::ASP=HASH(0x824ce84)') called
at /usr/lib/perl5/site_perl/5.8.0/Apache/ASP.pm line
387!!Apache::ASP::new('Apache::ASP','Apache::RequestRec=SCALAR(0x8b41f64)','/home/tangent/mms5/cli/mma-edit-title.asp')
called at /usr/lib/perl5/site_perl/5.8.0/Apache/ASP.pm line
181!!Apache::ASP::handler('Apache::RequestRec=SCALAR(0x8b41f64)')
called at -e line 0!!eval {...} called at -e line 0!, referer:
http://frank/mma-edit-title.asp?tid=97&sid=1
I'd guess some bit of code along the path is treating the Content-Length 
header as a signed 32-bit value.  This is a Linux 2.4 system, so it can 
handle large files.  What code is to blame here?

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