--- loncom/auth/loncacc.pm 2005/04/07 06:56:21 1.38 +++ loncom/auth/loncacc.pm 2011/10/24 22:39:14 1.55 @@ -2,7 +2,7 @@ # Cookie Based Access Handler for Construction Area # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer) # -# $Id: loncacc.pm,v 1.38 2005/04/07 06:56:21 albertel Exp $ +# $Id: loncacc.pm,v 1.55 2011/10/24 22:39:14 www Exp $ # # Copyright Michigan State University Board of Trustees # @@ -27,92 +27,7 @@ # http://www.lon-capa.org/ # -package Apache::loncacc; - -use strict; -use Apache::Constants qw(:common :http :methods REDIRECT); -use Apache::File; -use CGI::Cookie(); -use Fcntl qw(:flock); -use Apache::lonlocal; -use Apache::lonnet; - - -sub constructaccess { - my ($url,$ownerdomain)=@_; - my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)\//); - unless (($ownername) && ($ownerdomain)) { return ''; } - # We do not allow editing of previous versions of files. - if ($url=~/\.(\d+)\.(\w+)$/) { return ''; } - my @possibledomains = &Apache::lonnet::current_machine_domains(); - if ($ownername eq $env{'user.name'}) { - foreach my $domain (@possibledomains) { - if ($domain eq $env{'user.domain'}) { - return ($ownername,$domain); - } - } - } - - foreach my $domain (@possibledomains) { - my $capriv='user.priv.ca./'.$domain.'/'.$ownername.'./'; - foreach (keys %env) { - if ($_ eq $capriv) { - return ($ownername,$domain); - } - } - } - return ''; -} - -sub handler { - my $r = shift; - my $requrl=$r->uri; - $env{'request.editurl'}=$requrl; - my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); - my $lonid=$cookies{'lonID'}; - my $cookie; - if ($lonid) { - my $handle=$lonid->value; - $handle=~s/\W//g; - my $lonidsdir=$r->dir_config('lonIDsDir'); - if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { - -# ------------------------------------------------------ Initialize Environment - - &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); - -# --------------------------------------------------------- Initialize Language - - &Apache::lonlocal::get_language_handle($r); - -# -------------------------------------------------------------- Resource State - - $env{'request.state'} = "construct"; - $env{'request.filename'} = $r->filename; - - unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) { - $r->log_reason("Unauthorized $requrl", $r->filename); - return HTTP_NOT_ACCEPTABLE; - } - -# -------------------------------------------------------- Load POST parameters - - &Apache::loncommon::get_posted_cgi($r); - - return OK; - } else { - $r->log_reason("Cookie $handle not valid", $r->filename) - }; - } - -# ----------------------------------------------- Store where they wanted to go - - $env{'request.firsturl'}=$requrl; - return FORBIDDEN; -} - -1; -__END__ +=pod =head1 NAME @@ -158,19 +73,134 @@ store where they wanted to go (first url =head1 OTHERSUBROUTINES -=over 4 +=over -=item * +=item constructaccess($url,$setpriv) -constructaccess($url,$ownerdomain) : See if the owner domain and name +See if the owner domain and name in the URL match those in the expected environment. If so, return two element list ($ownername,$ownerdomain). Else, return null string. - +If 'setpriv' is set to 'setpriv', it actually assigns the privileges. =back =cut +package Apache::loncacc; + +use strict; +use Apache::Constants qw(:common :http :methods REDIRECT); +use Fcntl qw(:flock); +use Apache::lonlocal; +use Apache::lonnet; +use Apache::lonacc; +use LONCAPA qw(:DEFAULT :match); + +sub constructaccess { + my ($url,$setpriv)=@_; + +# We do not allow editing of previous versions of files + if ($url=~/\.(\d+)\.(\w+)$/) { return ''; } + +# Get username and domain from URL + my ($ownerdomain,$ownername)=($url=~/^\/priv\/($match_domain)\/($match_username)\//); + +# The URL does not really point to any authorspace, forget it + unless (($ownername) && ($ownerdomain)) { return ''; } + +# Now we need to see if the user has access to the authorspace of +# $ownername at $ownerdomain + + if (($ownername eq $env{'user.name'}) && ($ownerdomain eq $env{'user.domain'})) { +# Real author for this? + if (exists($env{'user.priv.au./'.$ownerdomain.'/./'})) { + return ($ownername,$ownerdomain); + } + } else { +# Co-author for this? + if (exists($env{'user.priv.ca./'.$ownerdomain.'/'.$ownername.'./'}) || + exists($env{'user.priv.aa./'.$ownerdomain.'/'.$ownername.'./'}) ) { + return ($ownername,$ownerdomain); + } + } +# We don't have any access right now. If we are not possibly going to do anything about this, +# we might as well leave + unless ($setpriv) { return ''; } + +# Backdoor access? + my $allowed=&Apache::lonnet::allowed('eco',$ownerdomain); +# Nope + unless ($allowed) { return ''; } +# Looks like we may have access, but could be locked by the owner of the construction space + if ($allowed eq 'U') { + my %blocked=&Apache::lonnet::get('environment',['domcoord.author'], + $ownerdomain,$ownername); +# Is blocked by owner + if ($blocked{'domcoord.author'} eq 'blocked') { return ''; } + } + if (($allowed eq 'F') || ($allowed eq 'U')) { +# Grant temporary access + my $then=$env{'user.login.time'}; + my $update==$env{'user.update.time'}; + if (!$update) { $update = $then; } + my $refresh=$env{'user.refresh.time'}; + if (!$refresh) { $refresh = $update; } + my $now = time; + &Apache::lonnet::check_adhoc_privs($ownerdomain,$ownername, + $update,$refresh,$now,'ca', + 'constructaccess'); + return($ownername,$ownerdomain); + } +# No business here + return ''; +} + +sub handler { + my $r = shift; + my $requrl=$r->uri; + $env{'request.editurl'}=$requrl; + + my $handle = &Apache::lonnet::check_for_valid_session($r); + if ($handle ne '') { + +# ------------------------------------------------------ Initialize Environment + my $lonidsdir=$r->dir_config('lonIDsDir'); + &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); + +# --------------------------------------------------------- Initialize Language + + &Apache::lonlocal::get_language_handle($r); + +# -------------------------------------------------------------- Resource State + + $env{'request.state'} = "construct"; + $env{'request.filename'} = $r->filename; + + unless (&constructaccess($requrl,'setpriv')) { + $r->log_reason("Unauthorized $requrl", $r->filename); + return HTTP_NOT_ACCEPTABLE; + } + +# -------------------------------------------------------- Load POST parameters + + &Apache::lonacc::get_posted_cgi($r); + + return OK; + } else { + $r->log_reason("Cookie $handle not valid", $r->filename) + } + +# ----------------------------------------------- Store where they wanted to go + + $env{'request.firsturl'}=$requrl; + return FORBIDDEN; +} + +1; +__END__ + + +