--- loncom/lond 2002/06/18 19:39:13 1.82 +++ loncom/lond 2002/09/03 02:02:50 1.90.2.1 @@ -2,7 +2,7 @@ # The LearningOnline Network # lond "LON Daemon" Server (port "LOND" 5663) # -# $Id: lond,v 1.82 2002/06/18 19:39:13 www Exp $ +# $Id: lond,v 1.90.2.1 2002/09/03 02:02:50 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -497,6 +497,8 @@ sub make_new_child { # ============================================================================= # do something with the connection # ----------------------------------------------------------------------------- + $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of + # connection liveness. # see if we know client and check for spoof IP by challenge my $caller=getpeername($client); my ($port,$iaddr)=unpack_sockaddr_in($caller); @@ -947,48 +949,61 @@ sub make_new_child { } else { print $client "rejected\n"; } +# -------------------------------------- fetch a user file from a remote server + } elsif ($userinput =~ /^fetchuserfile/) { + my ($cmd,$fname)=split(/:/,$userinput); + my ($udom,$uname,$ufile)=split(/\//,$fname); + my $udir=propath($udom,$uname).'/userfiles'; + unless (-e $udir) { mkdir($udir,0770); } + if (-e $udir) { + $ufile=~s/^[\.\~]+//; + $ufile=~s/\///g; + my $transname=$udir.'/'.$ufile; + my $remoteurl='http://'.$clientip.'/userfiles/'.$fname; + my $response; + { + my $ua=new LWP::UserAgent; + my $request=new HTTP::Request('GET',"$remoteurl"); + $response=$ua->request($request,$transname); + } + if ($response->is_error()) { + unlink($transname); + my $message=$response->status_line; + &logthis( + "LWP GET: $message for $fname ($remoteurl)"); + print $client "failed\n"; + } else { + print $client "ok\n"; + } + } else { + print $client "not_home\n"; + } +# ------------------------------------------ authenticate access to a user file + } elsif ($userinput =~ /^tokenauthuserfile/) { + my ($cmd,$fname,$session)=split(/:/,$userinput); + chomp($session); + $reply='non_auth'; + if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'. + $session.'.id')) { + while ($line=) { + if ($line=~/userfile\.$fname\=/) { $reply='ok'; } + } + close(ENVIN); + print $client $reply."\n"; + } else { + print $client "invalid_token\n"; + } # ----------------------------------------------------------------- unsubscribe } elsif ($userinput =~ /^unsub/) { my ($cmd,$fname)=split(/:/,$userinput); if (-e $fname) { - if (unlink("$fname.$hostid{$clientip}")) { - print $client "ok\n"; - } else { - print $client "not_subscribed\n"; - } + print $client &unsub($client,$fname,$clientip); } else { print $client "not_found\n"; } # ------------------------------------------------------------------- subscribe } elsif ($userinput =~ /^sub/) { - my ($cmd,$fname)=split(/:/,$userinput); - my $ownership=ishome($fname); - if ($ownership eq 'owner') { - if (-e $fname) { - if (-d $fname) { - print $client "directory\n"; - } else { - $now=time; - { - my $sh; - if ($sh= - IO::File->new(">$fname.$hostid{$clientip}")) { - print $sh "$clientip:$now\n"; - } - } - unless ($fname=~/\.meta$/) { - unlink("$fname.meta.$hostid{$clientip}"); - } - $fname=~s/\/home\/httpd\/html\/res/raw/; - $fname="http://$thisserver/".$fname; - print $client "$fname\n"; - } - } else { - print $client "not_found\n"; - } - } else { - print $client "rejected\n"; - } + print $client &subscribe($userinput,$clientip); # ------------------------------------------------------------------------- log } elsif ($userinput =~ /^log/) { my ($cmd,$udom,$uname,$what)=split(/:/,$userinput); @@ -1201,10 +1216,12 @@ sub make_new_child { my $proname=propath($udom,$uname); my $qresult=''; if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) { + study($regexp); foreach $key (keys %hash) { - if (eval('$key=~/$regexp/')) { + my $unescapeKey = &unescape($key); + if (eval('$unescapeKey=~/$regexp/')) { $qresult.="$key=$hash{$key}&"; - } + } } if (untie(%hash)) { $qresult=~s/\&$//; @@ -1289,6 +1306,20 @@ sub make_new_child { } else { print $client "error:$!\n"; } +# -------------------------------------------------------------------- chatsend + } elsif ($userinput =~ /^chatsend/) { + my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput); + &chatadd($cdom,$cnum,$newpost); + print $client "ok\n"; +# -------------------------------------------------------------------- chatretr + } elsif ($userinput =~ /^chatretr/) { + my ($cmd,$cdom,$cnum)=split(/\:/,$userinput); + my $reply=''; + foreach (&getchat($cdom,$cnum)) { + $reply.=&escape($_).':'; + } + $reply=~s/\:$//; + print $client $reply."\n"; # ------------------------------------------------------------------- querysend } elsif ($userinput =~ /^querysend/) { my ($cmd,$query, @@ -1402,14 +1433,20 @@ sub make_new_child { my $ulsout=''; my $ulsfn; if (-e $ulsdir) { - if (opendir(LSDIR,$ulsdir)) { - while ($ulsfn=readdir(LSDIR)) { - my @ulsstats=stat($ulsdir.'/'.$ulsfn); - $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; - } - closedir(LSDIR); - } - } else { + if(-d $ulsdir) { + if (opendir(LSDIR,$ulsdir)) { + while ($ulsfn=readdir(LSDIR)) { + my @ulsstats=stat($ulsdir.'/'.$ulsfn); + $ulsout.=$ulsfn.'&'. + join('&',@ulsstats).':'; + } + closedir(LSDIR); + } + } else { + my @ulsstats=stat($ulsdir); + $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; + } + } else { $ulsout='no_such_dir'; } if ($ulsout eq '') { $ulsout='empty'; } @@ -1514,9 +1551,118 @@ sub GetAuthType Debug("Returning nouser"); return "nouser"; } - } +sub addline { + my ($fname,$hostid,$ip,$newline)=@_; + my $contents; + my $found=0; + my $expr='^'.$hostid.':'.$ip.':'; + $expr =~ s/\./\\\./g; + if ($sh=IO::File->new("$fname.subscription")) { + while (my $subline=<$sh>) { + if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;} + } + $sh->close(); + } + $sh=IO::File->new(">$fname.subscription"); + if ($contents) { print $sh $contents; } + if ($newline) { print $sh $newline; } + $sh->close(); + return $found; +} + +sub getchat { + my ($cdom,$cname)=@_; + my %hash; + my $proname=&propath($cdom,$cname); + my @entries=(); + if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db", + &GDBM_READER(),0640)) { + @entries=map { $_.':'.$hash{$_} } sort keys %hash; + untie %hash; + } + return @entries; +} + +sub chatadd { + my ($cdom,$cname,$newchat)=@_; + my %hash; + my $proname=&propath($cdom,$cname); + my @entries=(); + if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db", + &GDBM_WRCREAT(),0640)) { + @entries=map { $_.':'.$hash{$_} } sort keys %hash; + my $time=time; + my ($lastid)=($entries[$#entries]=~/^(\w+)\:/); + my ($thentime,$idnum)=split(/\_/,$lastid); + my $newid=$time.'_000000'; + if ($thentime==$time) { + $idnum=~s/^0+//; + $idnum++; + $idnum=substr('000000'.$idnum,-6,6); + $newid=$time.'_'.$idnum; + } + $hash{$newid}=$newchat; + my $expired=$time-3600; + foreach (keys %hash) { + my ($thistime)=($_=~/(\d+)\_/); + if ($thistime<$expired) { + delete $hash{$_}; + } + } + untie %hash; + } +} + +sub unsub { + my ($fname,$clientip)=@_; + my $result; + if (unlink("$fname.$hostid{$clientip}")) { + $result="ok\n"; + } else { + $result="not_subscribed\n"; + } + if (-e "$fname.subscription") { + my $found=&addline($fname,$hostid{$clientip},$clientip,''); + if ($found) { $result="ok\n"; } + } else { + if ($result != "ok\n") { $result="not_subscribed\n"; } + } + return $result; +} + +sub subscribe { + my ($userinput,$clientip)=@_; + my $result; + my ($cmd,$fname)=split(/:/,$userinput); + my $ownership=&ishome($fname); + if ($ownership eq 'owner') { + if (-e $fname) { + if (-d $fname) { + $result="directory\n"; + } else { + if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);} + $now=time; + my $found=&addline($fname,$hostid{$clientip},$clientip, + "$hostid{$clientip}:$clientip:$now\n"); + if ($found) { $result="$fname\n"; } + # if they were subscribed to only meta data, delete that + # subscription, when you subscribe to a file you also get + # the metadata + unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); } + $fname=~s/\/home\/httpd\/html\/res/raw/; + $fname="http://$thisserver/".$fname; + $result="$fname\n"; + } + } else { + $result="not_found\n"; + } + } else { + $result="rejected\n"; + } + return $result; +} # ----------------------------------- POD (plain old documentation, CPAN style) =head1 NAME