3 # F*EX CGI for download
5 # Author: Ulli Horlacher <framstag@rus.uni-stuttgart.de>
8 BEGIN { ($ENV{PERLINIT}||'') =~ /(.+)/s and eval $1 }
10 use Fcntl qw':flock :seek';
17 ($FEXLIB) = $ENV{FEXLIB} =~ /(.+)/;
18 die "$0: no $FEXLIB\n" unless -d $FEXLIB;
20 our $error = 'F*EX download ERROR';
21 our $head = "$ENV{SERVER_NAME} F*EX download";
23 our ($spooldir,$tmpdir,@logdir,$skeydir,$dkeydir,$durl);
24 our ($bs,$fop_auth,$timeout,$keep_default,$nowarning);
25 our ($limited_download,$admin,$akey,$adlm,$amdl);
26 our (@file_link_dirs);
28 # load common code, local config : $HOME/lib/fex.ph
29 require "$FEXLIB/fex.pp" or die "$0: cannot load $FEXLIB/fex.pp - $!\n";
31 my $ra = $ENV{REMOTE_ADDR}||0;
32 if (@download_hosts and not ipin($ra,@download_hosts)) {
34 "Downloads from your host ($ra) are not allowed.",
35 "Contact $ENV{SERVER_ADMIN} for details."
41 # call localized fop if available
42 if ($0 !~ m{/locale/.*/fop} and my $lang = $ENV{HTTP_ACCEPT_LANGUAGE}) {
43 if ($lang =~ /^de/ and $0 =~ m{(.*)/cgi-bin/fop}) {
44 my $fop = "$1/locale/deutsch/cgi-bin/fop";
51 chdir $spooldir or die "$spooldir - $!\n";
53 my $http_client = $ENV{HTTP_USER_AGENT} || '';
55 $file = $ENV{PATH_INFO} || '';
56 http_die('no file name') unless $file;
57 $file =~ s:%3F:/?/:g; # escape '?' for URL-decoding
58 $file =~ s/%([\dA-F]{2})/unpack("a",pack("H2",$1))/ge;
59 $file =~ s:/\?/:%3F:g; # deescape '?'
60 $file =~ s:/\.\.:/__:g;
62 $file = untaint($file);
64 # secure mode with HTTP authorization?
67 if ($ENV{HTTP_AUTHORIZATION} and $ENV{HTTP_AUTHORIZATION} =~ /Basic\s+(.+)/) {
68 @http_auth = split(':',decode_b64($1));
70 if (@http_auth != 2) {
73 &check_auth($file,@http_auth);
76 # download-URL-scheme /$dkey/$file ?
77 if ($file =~ m:^([^/]+)/[^/]+$:) {
79 if ($link = readlink("$dkeydir/$dkey")) {
80 if ($link !~ s:^\.\./::) {
81 http_die("internal error on dkey for $link");
83 $file = untaint($link);
85 http_die("no such file $file");
88 # download-URL-scheme /$to/$from/$file
91 if ($ENV{REQUEST_METHOD} eq 'GET' and $file =~ m:.+/(.+)/.+:) {
93 if (-s "$from/\@ALLOWED_RECIPIENTS") {
94 http_die("$from is a restricted user");
98 # add mail-domain to addresses if necessary
99 if ($mdomain and $file =~ s:(.+)/(.+)/(.+):$3:) {
102 $to .= '@'.$hostname if $to eq 'anonymous';
103 $from .= '@'.$hostname if $from eq 'anonymous';
104 $to .= '@'.$mdomain if -d "$to\@$mdomain";
105 $from .= '@'.$mdomain if -d "$from\@$mdomain";
106 if ($ENV{REQUEST_METHOD} eq 'GET' and -s "$from/\@ALLOWED_RECIPIENTS") {
107 http_die("$from is a restricted user");
109 $file = "$to/$from/$file";
113 if ($file and $file =~ m:(.+)/(.+)/.+:) {
117 if ($from =~ s/^(anonymous).*/$1/) {
118 if (@anonymous_upload and ipin($ra,@anonymous_upload) or $dkey) {
121 http_header('403 Forbidden');
122 print html_header($head),
123 "You have no permission to request the URI $ENV{REQUEST_URI}\n",
129 http_die("unknown query format");
132 $data = "$file/data";
134 # open $file,$file; print Digest::MD5->new->addfile($file)->hexdigest;
136 # request with ?query-parameter ?
137 if ($qs = $ENV{QUERY_STRING}) {
139 http_die("\"$1\" is not allowed in URL") if $qs =~ /([<>\%\'\"])/;
141 # workaround for broken F*IX
142 $qs =~ s/&ID=skey:\w+//;
145 if ($qs =~ s/&*SKEY=([\w:]+)//i) {
148 if ($skey =~ s/^MD5H:(.+)/$1/) {
150 foreach my $s (glob "$skeydir/*") {
152 if ($skey eq md5_hex($s.$ENV{SID})) {
158 if (open $skey,'<',"$skeydir/$skey") {
161 $from = lc($1) if /^from=(.+)/;
162 $to = lc($1) if /^to=(.+)/;
166 $file =~ s:.*/:$to/$from/:;
168 http_die("INTERNAL ERROR: missing data in $skeydir/$skey");
171 debuglog("SKEY=$skey");
172 http_die("wrong SKEY authentification");
176 # group member with gkey?
177 if ($qs =~ s/&*GKEY=([\w:]+)//i) {
180 if ($gkey =~ s/^MD5H:(.+)/$1/) {
182 foreach my $g (glob "$gkeydir/*") {
184 if ($gkey eq md5_hex($g.$ENV{SID})) {
190 if (open $gkey,'<',"$gkeydir/$gkey") {
193 $from = lc($1) if /^from=(.+)/;
194 $group = lc($1) if /^to=\@(.+)/;
197 if ($from and $group and open $group,'<',"$from/\@GROUP/$group") {
203 $file =~ s:.*/:$to/$from/:;
209 http_die("INTERNAL ERROR: missing data in $gkeydir/$gkey");
212 debuglog("GKEY=$gkey");
213 http_die("wrong GKEY authentification");
217 # check for ID in query
218 elsif ($qs =~ s/\&*\bID=([^&]+)//i) {
222 if ($id eq 'PUBLIC') {
223 http_header('403 Forbidden');
227 if ($file =~ m:^(.+)/(.+)/(.+):) {
233 if ($mdomain and $from ne 'anonymous') {
234 $to .= '@'.$mdomain if $to !~ /@/;
235 $from .= '@'.$mdomain if $from !~ /@/;
240 http_die("unknown file query format");
243 # public or anonymous recipient? (needs no auth-ID for sender)
244 if ($anonymous or $id eq 'PUBLIC' and
245 @public_recipients and grep /^\Q$to\E$/i,@public_recipients) {
248 open my $idf,'<',"$from/@" or http_die("unknown user $from");
249 $rid = getline($idf);
251 $rid = sidhash($rid,$id);
254 unless ($id eq $rid) {
255 debuglog("real id=$rid, id sent by user=$id");
256 http_die("wrong auth-ID");
259 # set akey link for HTTP sessions
260 # (need original id for consistant non-moving akey)
261 if (-d $akeydir and open $idf,'<',"$from/@" and my $id = getline($idf)) {
262 $akey = untaint(md5_hex("$from:$id"));
263 unlink "$akeydir/$akey";
264 symlink "../$from","$akeydir/$akey";
268 COLLECTTO: foreach my $to (split(',',$to)) {
269 if ($to !~ /.@./ and open my $AB,'<',"$from/\@ADDRESS_BOOK") {
274 if (/^\s*([\S]+)\s+([\S]+)/) {
275 my ($alias,$address) = ($1,$2);
276 if ($to =~ /^\Q$alias\E$/i) {
277 foreach my $to (split(",",$address)) {
278 $to .= '@'.$mdomain if $mdomain and $to !~ /@/;
279 $to{$to} = lc $to; # ignore dupes
285 } elsif ($to =~ /^\@(.+)/) {
286 my $group = "$from/\@GROUP/$1";
287 if (not -l $group and open $group) {
291 if (/(.+\@[w.-]+):.+/) {
292 $to{$1} = lc $1; # ignore dupes
298 $to .= '@'.$mdomain if $mdomain and $to !~ /.@./;
299 $to{$to} = lc $to; # ignore dupes
302 foreach $to (keys %to) {
303 # if (-e "$to/\@CAPTIVE") { http_die("$to is CAPTIVE") }
304 unless (-d $to or checkaddress($to)) {
305 http_die("$to is not a legal e-mail address");
311 if ($qs =~ /\&?KEEP=(\d+)/i) {
313 $filename = filename($file);
314 check_captive($file);
317 if (symlink $keep,"$file/keep") {
318 http_header('200 OK');
319 print html_header($head),
320 "<h3>set keep=$keep for $filename</h3>\n",
323 http_header('599 internal error');
324 print html_header($head),
325 "<h3>$filename - $!</h3>\n",
329 http_header('404 File not found');
330 print html_header($head),
331 "<h3>$filename not found</h3>\n",
335 } elsif ($qs =~ s/\&?KEEP//i) {
336 check_captive($file);
340 if ($qs =~ s/\&?FILEID=(\w+)//i) { $fileid = $1 }
342 if ($qs =~ s/\&?IGNOREWARNING//i) { $ignorewarning = 1 }
345 http_header('200 OK','Content-Type: text/plain');
347 chdir $file and exec '/client/bin/l';
351 # copy file to yourself
353 unless (-f "$file/data") {
354 http_die("File not found.");
356 ($to,$from,$file) = split('/',$file);
358 # http_header('403 Forbidden');
359 # print html_header($head),
360 # "You have no permission to copy a file.\n",
361 # "</body></html>\n";
362 http_die("You have no permission to copy a file.");
364 if (-s "$to/\@ALLOWED_RECIPIENTS") {
365 http_die("You are a restricted user.");
367 if (-e "$to/$to/$file/data") {
368 # http_header('409 File Exists');
369 # print html_header($head),
370 # "File $file already exists in your outgoing spool.\n",
371 # "</body></html>\n";
372 http_die("File $file already exists in your outgoing spool.");
374 mkdirp("$to/$to/$file");
375 link "$to/$from/$file/data","$to/$to/$file/data"
376 or http_die("cannot link to $to/$to/$file/data - $!\n");
377 my $fkey = copy("$to/$from/$file/filename","$to/$to/$file/filename");
378 open my $notify,'>',"$to/$to/$file/notify";
380 my $dkey = randstring(8);
381 unlink "$to/$to/$file/dkey","$dkeydir/$dkey";
382 symlink "../$to/$to/$file","$dkeydir/$dkey";
383 symlink $dkey,"$to/$to/$file/dkey";
384 http_header('200 OK',"Location: $durl/$dkey/$fkey");
385 print html_header($head),
386 "File $file copied to yourself.\n",
392 if ($qs =~ s/(^|&)DELETE//i) {
394 $filename = filename($file);
395 if (open my $log,'>',"$file/error") {
396 printf {$log} "%s has been deleted by %s at %s\n",
397 $filename,$ENV{REMOTE_ADDR},isodate(time);
400 foreach my $logdir (@logdir) {
401 my $msg = sprintf "%s [%s_%s] %s %s deleted\n",
402 isodate(time),$$,$ENV{REQUESTCOUNT},$ra,encode_Q($file);
403 if (open $log,'>>',"$logdir/$log") {
408 http_header('200 OK',"X-File: $file");
409 print html_header($head),
410 "<h3>$filename deleted</h3>\n",
414 http_die("no such file");
419 # wipe out!? (for anonymous upload)
420 if ($qs =~ s/(^|&)PURGE//i) {
421 $filename = filename($file);
422 if (@anonymous_upload and ipin($ra,@anonymous_upload)) {
423 unlink "$dkeydir/$dkey" if $dkey;
425 foreach my $logdir (@logdir) {
426 my $msg = sprintf "%s [%s_%s] %s %s purged\n",
427 isodate(time),$$,$ENV{REQUESTCOUNT},$ra,encode_Q($file);
428 if (open $log,'>>',"$logdir/$log") {
433 http_header('200 OK',"X-File: $file");
434 print html_header($head),
435 "<h3>$filename purged</h3>\n",
438 http_die("no such file");
441 http_die("you are not allowed to purge $filename");
446 # request for file size?
449 # control back to fexsrv for further HTTP handling
455 http_die("unknown query format $qs");
460 unless ($id and $rid and $id eq $rid or $dkey or $anonymous) {
461 http_die("wrong parameter $file");
465 http_die("internal error: unknown recipient");
469 http_die("internal error: unknown sender");
472 &check_status($from);
474 # server based ip restrictions
475 if (@download_hosts and not ipin($ra,@download_hosts)) {
477 "Downloads from your host ($ra) are not allowed.",
478 "Contact $ENV{SERVER_ADMIN} for details."
482 # user based ip restrictions
483 unless (check_rhosts("$to/\@DOWNLOAD_HOSTS")) {
484 http_die("You are not allowed to download from IP $ra");
487 # file based ip restrictions
488 unless (check_rhosts("$file/restrictions")) {
489 http_die("Download of files from external user $from is restricted "
490 ."to internal hosts. Your IP $ra is not allowed.");
493 # set time mark for this access
494 if ($file =~ m:(.+?)/:) {
496 my $time = untaint(time);
497 utime $time,$time,$user;
501 if ($range = $ENV{HTTP_RANGE}) {
502 $seek = $1 if $range =~ /^bytes=(\d+)-/i;
503 $stop = $1 if $range =~ /^bytes=\d*-(\d+)/i;
509 if (not $autodelete or $autodelete ne 'NO') {
510 $autodelete = readlink "$file/autodelete" || 'YES';
513 if ($from and $file eq "$from/$from/ADDRESS_BOOK") {
514 if (open my $AB,'<',"$from/\@ADDRESS_BOOK") {
525 'Content-Length: ' . length($ab),
526 'Content-Type: text/plain',
532 'HTTP/1.1 404 No address book found',
537 # control back to fexsrv for further HTTP handling
542 # already downloaded?
543 if ($limited_download and $limited_download !~ /^n/i
544 and $from ne $to # fex to yourself is ok!
545 and $to !~ /$amdl/ # allowed multi download recipients
546 and $from !~ /^_?fexmail/ # fexmail is ok!
547 and $to !~ /^_?fexmail/ # fexmail is ok!
548 and $to !~ /^anonymous/ # anonymous fex is ok!
549 and $http_client !~ /$adlm/ # allowed download managers
550 and $file !~ /\/STDFEX$/ # xx is ok!
551 and (slurp("$file/comment")||'') !~ /^!\*!/ # multi download allow flag
552 and not($dkey and ($ENV{HTTP_COOKIE}||'') =~ /dkey=$dkey/)
553 and open $file,'<',"$file/download")
559 # allow downloads from same ip
561 # allow downloads from sender ip
562 $_ = '' if (readlink("$file/ip")||'') eq $ra;
565 s/(.+) ([\w.:]+)$/by $2 at $1/;
566 $file = filename($file);
567 http_die("$file has already been downloaded $_");
570 $sb = sendfile($file,$seek,$stop);
574 http_die("<code>$file</code> has been withdrawn");
575 } elsif (open $errf,'<',"$file/error" and $err = getline($errf)) {
576 fdlog($log,$file,0,0);
579 fdlog($log,$file,0,0);
580 if ($file =~ /^anonymous.*afex_\d+\.tar$/) {
581 # should be extra handled...
583 http_die("no such file $file");
586 debuglog(sprintf("%s %s %d %d %d",
587 isodate(time),$file,$sb||0,$seek,-s $data||0));
589 if ($sb+$seek == -s $data) {
591 # note successfull download
592 $download = "$file/download";
593 if (open $download,'>>',$download) {
594 printf {$download} "%s %s\n",isodate(time),$ENV{REMOTE_ADDR};
598 # delete file after grace period
599 if ($autodelete eq 'YES') {
600 $grace_time = 60 unless defined $grace_time;
602 my $utime = (stat $data)[8] || 0;
603 my $dtime = (stat $download)[8] || 0;
604 exit if $utime > $dtime;
605 last if time > $dtime+$grace_time;
609 my $error = "$file/error";
610 if (open $error,'>',$error) {
611 printf {$error} "%s has been autodeleted after download from %s at %s\n",
612 filename($file),$ENV{REMOTE_ADDR},isodate(time);
623 my ($file,$seek,$stop) = @_;
624 my ($filename,$size,$total_size,$fileid,$filetype);
625 my ($data,$download,$header,$buf,$range,$s,$b,$t0);
628 # swap to and from for special senders, see fup storage swap!
629 $file =~ s:^(_?anonymous_.*)/(anonymous.*)/:$2/$1/:;
630 $file =~ s:^(_?fexmail_.*)/(fexmail.*)/:$2/$1/:;
632 $data = $file.'/data';
633 $download = $file.'/download';
634 $header = $file.'/header';
636 # fallback defaults, should be set later with better values
637 $filename = filename($file);
638 $total_size = -s $data || 0;
642 unless (-f $data and -r $data) {
643 http_die("<code>$file</code> has been withdrawn");
645 $data = abs_path($data);
647 foreach (@file_link_dirs) {
648 my $dir = abs_path($_);
649 $fok = $data if $data =~ /^\Q$dir\//;
652 http_die("no permission to download <code>$file</code>");
655 unless (-f $data and -r $data) {
656 http_die("<code>$file</code> has gone");
660 if ($ENV{REQUEST_METHOD} eq 'GET') {
661 debuglog("Exp: FROM=\"$from\"","Exp: TO=\"$to\"");
662 open $data,$data and flock($data,LOCK_EX|LOCK_NB);
663 # security check: must be regular file after abs_path()
665 http_die("no permission to download <code>$file</code>");
667 # HTTP Range download suckers are already rejected by fexsrv
668 unless ($range = $ENV{HTTP_RANGE}) {
670 open $download,'>>',$download or die "$download - $!\n";
671 if ($file =~ m:(.+?)/(.+?)/: and $1 ne $2) {
672 # only one concurrent download is allowed if sender <> recipient
673 flock($download,LOCK_EX|LOCK_NB) or
674 http_die("$file locked: a download is already in progress");
677 $size = $total_size - $seek - ($stop ? $total_size-$stop-1 : 0);
678 } elsif ($ENV{REQUEST_METHOD} eq 'HEAD') {
679 $size = -s $data || 0;
681 http_die("unknown HTTP request method $ENV{REQUEST_METHOD}");
684 # read MIME entity header (what the client said)
685 if (open $header,'<',$header) {
687 if (/^Content-Type: (.+)/i) {
696 $fileid = readlink "$file/id" || '';
698 # determine own MIME entity header for download
700 $mime =~ s:/.*:/\@MIME:;
701 my $mt = $ENV{FEXHOME}.'/etc/mime.types';
702 if (($type =~ /x-mime/i or -e $mime) and open $mt,'<',$mt) {
703 $type = 'application/octet-stream';
704 MIMETYPES: while (<$mt>) {
708 my ($mt,@ft) = split;
709 foreach my $ft (@ft) {
710 if ($filename =~ /\.\Q$ft\E$/i) {
718 # reset to default MIME type
719 else { $type = 'application/octet-stream' }
721 # HTML is not allowed for security reasons! (embedded javascript, etc)
722 $type =~ s/html/plain/i;
724 debuglog("download with $http_client");
726 if ($seek or $stop) {
728 http_header('416 Requested Range Not Satisfiable');
732 $range = sprintf("bytes %s-%s/%s",$seek,$stop,$total_size);
734 $range = sprintf("bytes %s-%s/%s",$seek,$total_size-1,$total_size);
737 'HTTP/1.1 206 Partial Content',
738 "Content-Length: $size",
739 "Content-Range: $range",
740 "Content-Type: $type",
742 if ($http_client !~ /MSIE/) {
743 nvt_print("Cache-Control: no-cache");
744 if ($type eq 'application/octet-stream') {
745 nvt_print("Content-Disposition: attachment; filename=\"$filename\"");
750 # another stupid IE bug-workaround
751 # http://drupal.org/node/163445
752 # http://support.microsoft.com/kb/323308
753 if ($http_client =~ /MSIE/ and not $nowarning) {
754 # $type = 'application/x-msdownload';
755 if ($ignorewarning) {
756 $type .= "; filename=$filename";
759 "Content-Length: $size",
760 "Content-Type: $type",
761 # "Pragma: no-cache",
762 # "Cache-Control: no-store",
763 "Content-Disposition: attachment; filename=\"$filename\"",
766 # nvt_print('','HTTP/1.1 200 OK',"Content-Length: $size","Content-Type: $type"); exit;
768 http_header('200 OK');
769 print html_header($head);
771 '<h2>Internet Explorer warning</h2>'
772 'Using Microsoft Internet Explorer for download will probably'
773 'lead to problems, because it is not Internet compatible (RFC 2616).'
775 'We recommend <a href="http://firefox.com">Firefox</a>'
777 'If you really want to continue with Internet Explorer, then'
778 '<a href="$ENV{REQUEST_URL}?IGNOREWARNING">'
779 'click here with your right mouse button and select "save as"'
782 'See also <a href="/FAQ/user.html">F*EX user FAQ</a>.'
790 "Content-Length: $size",
791 "Content-Type: $type",
792 "Cache-Control: no-cache",
795 if ($type eq 'application/octet-stream') {
796 nvt_print(qq'Content-Disposition: attachment; filename="$filename"');
800 nvt_print("X-Size: $total_size");
801 nvt_print("X-File-ID: $fileid") if $fileid;
802 # if ((`file "$file/data" 2>/dev/null` || '') =~ m{.*/data:\s(.+)}) {
803 # nvt_print("X-File-Type: $1");
805 if ($dkey = $dkey||readlink "$file/dkey") {
806 my $ma = (readlink "$file/keep"||$keep_default)*60*60*24;
807 nvt_print("Set-Cookie: dkey=$dkey; Max-Age=$ma; Path=$ENV{REQUEST_URI}");
812 if ($ENV{REQUEST_METHOD} eq 'HEAD') {
813 # control back to fexsrv for further HTTP handling
817 if ($ENV{REQUEST_METHOD} eq 'GET') {
822 foreach (@throttle) {
826 # throttle ip address?
827 if ($throttle =~ /^[\d.-]+$/) {
828 if (ipin($ra,$throttle)) {
833 # throttle e-mail address?
835 # allow wildcard *, but not regexps
836 $throttle =~ quotemeta $throttle;
837 $throttle =~ s/\*/.*/g;
838 if ($to =~ /$throttle$/) {
847 foreach my $sig (keys %SIG) { local $SIG{$sig} = \&sigexit }
848 local $SIG{ALRM} = sub { die "TIMEOUT\n" };
855 # sysread/syswrite because of speed
856 while ($s < $size and $b = sysread($data,$buf,$bs)) {
857 # last chunk for HTTP Range?
858 if ($stop and $s+$b > $size) {
860 $buf = substr($buf,0,$b)
864 syswrite STDOUT,$buf or last; # client still alive?
867 sleep 1 while $s/(time-$t0||1)/1024 > $bwl;
874 fdlog($log,$file,$s,$size);
884 my ($file,$upload,$to,$from,$dkey);
889 ($to,$from,$file) = split('/',$path);
894 # swap to and from for special senders, see fup storage swap!
895 ($from,$to) = ($to,$from) if $from =~ /^(fexmail|anonymous)/;
897 $to .= '@'.$hostname if $to eq 'anonymous';
898 $from .= '@'.$hostname if $from eq 'anonymous';
900 $to .= '@'.$mdomain if -d "$to\@$mdomain";
901 $from .= '@'.$mdomain if -d "$from\@$mdomain";
903 $file =~ s/%([A-F0-9]{2})/chr(hex($1))/ge;
904 $file = urlencode($file);
906 if ($to eq '*' and $fileid) {
907 foreach my $fd (glob "*/$from/$file") {
909 and -l "$fd/id" and readlink "$fd/id" eq $fileid
910 and $dkey = readlink "$fd/dkey") {
916 } elsif ($to !~ /@/ and open my $AB,'<',"$from/\@ADDRESS_BOOK") {
920 my ($alias,$address) = split;
923 $address .= '@'.$mdomain if $mdomain and $address !~ /@/;
933 if (-f "$to/$from/$file/data") {
934 $dkey = readlink "$to/$from/$file/dkey";
935 $fkey = slurp("$to/$from/$file/filename")||$file;
938 $upload = -s "$to/$from/$file/upload" || -s "$to/$from/$file/data" || 0;
939 $size = readlink "$to/$from/$file/size" || 0;
940 $fileid = readlink "$to/$from/$file/id" || '';
942 nvt_print('HTTP/1.1 200 OK');
943 nvt_print("Server: fexsrv");
944 nvt_print("Content-Length: $upload");
945 nvt_print("X-Original-Recipient: $to");
946 if ($dkey and not -s "$from/\@ALLOWED_RECIPIENTS") {
947 nvt_print("X-DKEY: $dkey");
948 nvt_print("X-Location: $durl/$dkey/$fkey") if $fkey;
950 nvt_print("X-Size: $size");
951 nvt_print("X-File-ID: $fileid") if $fileid;
952 nvt_print("X-Features: $ENV{FEATURES}");
962 if (open $ipr,$ipr) {
967 if ($_ eq '@LOCAL_RHOSTS') {
968 push @hosts,@local_rhosts if @local_rhosts;
974 if (@hosts and not ipin($ra,@hosts)) {
984 '401 Authorization Required',
985 'WWW-Authenticate: Basic realm="'.$ENV{SERVER_NAME}.' F*EX download"',
988 # control back to fexsrv for further HTTP handling
994 my ($path,$user,$auth) = @_;
995 my ($to,$from,$file,$dkey);
997 my ($subuser,$subid);
1001 if ($path =~ m:(.+)/(.+)/(.+):) {
1002 ($to,$from,$file) = ($1,$2,$3);
1003 } elsif ($path =~ m:(.+)/(.+):) {
1004 ($dkey,$file) = ($1,$2);
1005 $path = readlink "$dkeydir/$dkey" or http_die('no such file');
1006 (undef,$to,$from,$file) = split('/',$path);
1008 http_die("wrong URL format for download");
1011 $to .= '@'.$mdomain if $mdomain and $to !~ /@/;
1012 $from .= '@'.$mdomain if $mdomain and $from !~ /@/;
1017 # auth user match to in download URL?
1018 if ($to ne $user and "$to\@$mdomain" ne $user and $to ne "$user@$mdomain") {
1019 debuglog("mismatch: to=$to, auth user=$user");
1023 # check for real user
1024 if (open $idf,'<',"$to/@") {
1025 $id = getline($idf);
1027 unless ($id and $id eq $auth) {
1028 debuglog("$user mismatch: id=$id, auth=$auth");
1032 # check for sub user
1033 elsif (open $idf,'<',"$from/\@SUBUSER") {
1037 ($subuser,$subid) = split ':';
1038 if ($subid and $subid eq $auth
1039 and ($user eq $subuser
1040 or $subuser eq '*@*'
1041 or $subuser =~ /^\*\@(.+)/ and $user =~ /\@\Q$1\E$/i
1042 or $subuser =~ /(.+)\@\*$/ and $user =~ /^\Q$1\E\@/i)) {
1049 debuglog("no matching $user in $from/\@SUBUSER");
1053 debuglog("no $to/@ and no $from/@");
1063 $to .= '@'.$mdomain if $mdomain and -d "$to\@$mdomain";
1064 if (-e "$to/\@CAPTIVE") {
1065 http_die("$to is CAPTIVE - no URL parameters allowed");
1074 $msg = @_ ? "@_" : '???';
1078 errorlog("$file caught SIGNAL $msg");
1080 # sigpipe means: client has terminated
1081 # this event will be handled further by sendfile(), do not terminate here
1082 if ($sig ne 'PIPE') {
1084 if ($sig eq 'DIE') {
1088 die "SIGNAL $msg\n";