100 lines
2.6 KiB
Perl
100 lines
2.6 KiB
Perl
package Slackmetarep::Upload;
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use strict;
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use warnings;
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use vars qw/$VERSION/;
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use English qw( -no_match_vars );
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use Carp;
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use Fcntl;
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use Slackmetarep::Conf qw(loadConf);
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use Exporter qw(import);
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our @EXPORT_OK = qw(upload);
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$VERSION = '1.0';
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my $c = loadConf ();
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sub upload {
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my $input = shift; # file descriptor with data being uploaded
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my $len = shift; # expected data length (from client)
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my $name = shift; # upload "dir" and filename
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my ($status, $content, $msg) = ('400', 'text/plain', "Bad Request?\n");
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return ($status, $content, "No Content-Length supplied.\n") unless (defined $len);
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return ($status, $content, "No name supplied.\n") unless (defined $name);
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my $d;
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($d, $name) = split (/\//xms, $name, 2);
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return ($status, $content, "Name does not match pattern.\n") unless ($name =~ /^[[:alnum:]_\-\+\.]+$/xmsg);
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my $match;
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foreach my $uploaddir (keys(%{$c->{upload}->{dir}})) {
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if ($d eq $uploaddir) {
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$match = 1;
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last;
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}
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}
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return ($status, $content, "Incorrect destination dir.\n") unless $match; # incorrect destination in url
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$name = sprintf('%s/%s', $c->{upload}->{dir}->{$d}, $name);
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if ($len > 0) {
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if (sysopen (my $FH, $name, O_CREAT|O_TRUNC|O_WRONLY)) {
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my $buf;
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my $readlen = 0;
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my $totalread = 0;
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my $buflen = 524288; # 512 kbytes, looks sane enough
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if ($len < $buflen) {
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$buflen = $len;
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}
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do {
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$readlen = $input->read($buf, $buflen);
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my $written = syswrite $FH, $buf, $readlen;
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unless (defined($written)) { # out of space?
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close $FH; ## no critic (InputOutput::RequireCheckedSyscalls)
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unlink $name;
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carp "[FATA] Unable to write to $name: $OS_ERROR";
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return ('500', $content, "An error has occured during upload: $OS_ERROR\n");
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}
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if ($readlen != $written) {
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close $FH; ## no critic (InputOutput::RequireCheckedSyscalls)
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unlink $name;
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carp "[FATA] Must write $readlen bytes, but actualy wrote $written bytes to $name";
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return ('500', $content, "An error has occured during upload: $OS_ERROR\n");
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}
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$totalread += $readlen;
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} while ($readlen == $buflen);
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close $FH; ## no critic (InputOutput::RequireCheckedSyscalls)
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if ($totalread != $len) {
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($content, $msg) = ($content, "Content-Length does not match amount of recieved bytes.\n");
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} else {
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($status, $content, $msg) = ('201', $content, "Uploaded.\n");
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}
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} else {
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carp "[FATA] Unable to open file $name: $OS_ERROR";
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($status, $content, $msg) = ('500', $content, "Unable to write: $OS_ERROR\n");
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}
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} else {
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$msg = "Incorrect Content-Length\n";
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}
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return ($status, $content, $msg);
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}
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1;
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# vim: set ft=perl noet ai ts=4 sw=4 sts=4 :
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