yolanda/branches/old-perl/trunk/download.pl

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Perl
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require "functions.pl";
#initialize session data
CGI::Session->name($config->{"page_cookie_name"});
$query = new CGI;
$session = new CGI::Session;
#do we have an id?
if($query->param('id'))
{
#check if video with requested id is in the database
my $sth = $dbh->prepare(qq{select title from videos where id = ? });
$sth->execute($query->param('id'));
if(($title) = $sth->fetchrow_array())
{
#are we only watching this video or downloading it?
if($query->param('view'))
{
#seems we only want to watch it - update viewcount
$dbh->do(qq{update videos set viewcount=viewcount+1 where id = ? }, undef, $query->param('id')) or die $dbh->errstr;
}
else
{
#video is being downloaded - update downloadcount
$dbh->do(qq{update videos set downloadcount=downloadcount+1 where id = ? }, undef, $query->param('id')) or die $dbh->errstr;
}
#open video file
$file = open(FILE, "<$root/videos/".$query->param('id'));
if($file)
{
#TODO: replace all of this with fastcgi x-sendfile
#get video filesize
$filesize = -s "$root/videos/".$query->param('id');
#get http query range
#TODO: also allow range end
$range = $query->http('range');
$range =~ s/bytes=([0-9]+)-/$1/;
#if a specific range is requested send http partial content headers and seek in the inputfile
if($range)
{
#if $range is equal or more than filesize throw http 416 header
if($range >= $filesize)
{
print $query->header(-status=>'416 Requested Range Not Satisfiable');
}
else
{
#print correct http partial header
print $query->header(-type=>'application/ogg',
-content_length=> $filesize-$range,
-status=>'206 Partial Content',
-attachment=>$title.".ogv",
-accept_ranges=> "bytes",
-content_range=> "bytes $range-".($filesize-1)."/$filesize"
);
#seek file to the requested position
seek FILE, $range, 0;
}
}
else
{
#print normal header
print $query->header(-type=>'application/ogg',
-content_length=> $filesize,
-attachment=>$title.".ogv"
);
}
#in both cases - do some slurp-eaze to the browser
while (my $BytesRead = read (FILE, $buff, 8192))
{
print $buff;
}
close(FILE);
}
else
{
#the requested file should be there but is not - throw server error
print $session->header(
-status=>'500 Internal Server Error'
)
}
}
else
{
#no such video exists - 404
print $session->header(
-status=>'404 Not found'
)
}
}
else
{
#no if was supplied
print $query->redirect("index.pl?error=error_202c");
}