# The LearningOnline Network
# URL translation for User Files
#
# $Id: lontrans.pm,v 1.24 2018/07/26 19:01:25 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
package Apache::lontrans;
use strict;
use Apache::Constants qw(:common :remotehost REDIRECT :http);
use Apache::lonnet;
use Apache::File();
use LONCAPA qw(:DEFAULT :match);
sub handler {
my $r = shift;
# FIXME line remove when mod_perl fixes BUG#4948
$r->notes->set('error-notes' => '');
if ($r->uri =~ m{^/+tiny/+($match_domain)/+(\w+)$}) {
my ($cdom,$key) = ($1,$2);
if (&Apache::lonnet::domain($cdom) ne '') {
my %user;
my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
if ($handle ne '') {
my $lonidsdir=$r->dir_config('lonIDsDir');
&Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
if ($env{'request.course.id'}) {
my $tinyurl;
my ($result,$cached)=&Apache::lonnet::is_cached_new('tiny',$cdom."\0".$key);
if (defined($cached)) {
$tinyurl = $result;
} else {
my $configuname = &Apache::lonnet::get_domainconfiguser($cdom);
my %currtiny = &Apache::lonnet::get('tiny',[$key],$cdom,$configuname);
if ($currtiny{$key} ne '') {
$tinyurl = $currtiny{$key};
&Apache::lonnet::do_cache_new('tiny',$cdom."\0".$key,$currtiny{$key},600);
}
}
if ($tinyurl ne '') {
my ($cnum,$symb) = split(/\&/,$tinyurl);
if (($cnum =~ /^$match_courseid$/) &&
(&Apache::lonnet::homeserver($cnum,$cdom) ne 'no_host')) {
if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
my ($map,$resid,$url) = &Apache::lonnet::decode_symb($symb);
if (&Apache::lonnet::is_on_map($url)) {
my $realuri;
if ((&Apache::lonnet::EXT('resource.0.hiddenresource',$symb) =~ /^yes$/i) &&
(!$env{'request.role.adv'})) {
$env{'user.error.msg'}=$r->uri.':bre:1:1:Access to resource denied';
return HTTP_NOT_ACCEPTABLE;
}
if ((&Apache::lonnet::EXT('resource.0.encrypturl',$symb) =~ /^yes$/i) &&
(!$env{'request.role.adv'})) {
$realuri = &Apache::lonenc::encrypted(&Apache::lonnet::clutter($url));
if (($url =~ /\.sequence$/) &&
($env{'course.'.$env{'request.course.id'}.'.type'} ne 'Placement')) {
$realuri .= '?navmap=1';
} else {
$realuri .= '?symb='.&Apache::lonenc::encrypted($symb);
}
} else {
$realuri = &Apache::lonnet::clutter($url);
if (($url =~ /\.sequence$/) &&
($env{'course.'.$env{'request.course.id'}.'.type'} ne 'Placement')) {
$realuri .= '?navmap=1';
} else {
$realuri .= '?symb='.$symb;
}
}
my $host = $r->headers_in->get('Host');
if ($r->is_initial_req() || !$host) {
$r->internal_redirect($realuri);
return OK;
} else {
my $protocol = 'http';
if ($r->get_server_port == 443) {
$protocol = 'https';
}
my $location = $protocol.'://'.$host.$realuri;
$r->headers_out->set(Location => $location);
return REDIRECT;
}
}
}
}
}
}
}
}
} elsif ($r->uri=~m{^/raw/}) {
my $host = $r->headers_in->get('Host');
if ($host) {
unless ($host =~ /^internal\-/) {
my $remote_ip = $r->get_remote_host();
my $lonhost = $r->dir_config('lonHostID');
if (&redirect_raw($remote_ip,$lonhost)) {
my $location = 'https://internal-'.$host.$r->uri;
$r->headers_out->set(Location => $location);
return REDIRECT;
}
}
}
}
if ($r->uri=~m|^(/raw)?/uploaded/|) {
my $fn = $r->uri();
$fn=~s/^\/raw//;
my (undef,undef,$udom,$uname,@ufile)=split(/\//,$fn);
if (@ufile) { $ufile[-1]=~s/^[\~\.]+//; }
my $chome=&Apache::lonnet::homeserver($uname,$udom);
my $allowed=0;
my @ids=&Apache::lonnet::current_machine_ids();
foreach my $id (@ids) { if ($id eq $chome) { $allowed=1; } }
if ($allowed) {
$r->filename(&propath($udom,$uname).
'/userfiles/'.(join('/',@ufile)));
}
return OK;
} else {
return DECLINED;
}
}
sub redirect_raw {
my ($remote_ip,$lonhost) = @_;
my @remhostids = &Apache::lonnet::get_hosts_from_ip($remote_ip);
my $redirect;
while (@remhostids) {
my $try_server = pop(@remhostids);
my $remhostname = &Apache::lonnet::hostname($try_server);
if ($remhostname) {
my $remoterev = &Apache::lonnet::get_server_loncaparev(undef,$try_server);
my ($remmajor,$remminor) = ($remoterev =~ /^(\d+)\.(\d+)/);
if (($remmajor > 2) || (($remmajor == 2) && $remminor >= 12)) {
my $internet_names = &Apache::lonnet::get_internet_names($try_server);
if (ref($internet_names) eq 'ARRAY') {
my $intdom = &Apache::lonnet::internet_dom($lonhost);
unless (grep(/^\Q$intdom\E$/,@{$internet_names})) {
my $lonhostname = &Apache::lonnet::hostname($lonhost);
my $serverhomeID = &Apache::lonnet::get_server_homeID($lonhostname);
my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
my %domdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
my $replication = $domdefaults{'replication'};
if (ref($replication) eq 'HASH') {
my $remhomeID = &Apache::lonnet::get_server_homeID($remhostname);
my $remhomedom = &Apache::lonnet::host_domain($remhomeID);
my $remprimary = &Apache::lonnet::domain($remhomedom,'primary');
my $remintdom = &Apache::lonnet::internet_dom($remprimary);
if (ref($replication->{'certreq'}) eq 'ARRAY') {
if (grep(/^\Q$remintdom\E$/,@{$replication->{'certreq'}})) {
$redirect = 0;
} else {
$redirect = 1;
}
}
if (ref($replication->{'nocertreq'}) eq 'ARRAY') {
if (grep(/^\Q$remintdom\E$/,@{$replication->{'nocertreq'}})) {
$redirect = 1;
} else {
$redirect = 0;
}
}
}
}
}
}
last;
}
}
return $redirect;
}
1;
__END__
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