--- loncom/lontrans.pm	2018/04/17 14:02:56	1.21
+++ loncom/lontrans.pm	2023/06/02 01:20:28	1.41
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # URL translation for User Files
 #
-# $Id: lontrans.pm,v 1.21 2018/04/17 14:02:56 raeburn Exp $
+# $Id: lontrans.pm,v 1.41 2023/06/02 01:20:28 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -29,154 +29,133 @@
 package Apache::lontrans;
 
 use strict;
-use Apache::Constants qw(:common :remotehost REDIRECT :http);
+use Apache::Constants qw(:common :remotehost);
 use Apache::lonnet;
+use Apache::loncommon;
 use Apache::File();
 use LONCAPA qw(:DEFAULT :match);
 
 sub handler {
     my $r = shift;
-    # FIXME line remove when mod_perl fixes BUG#4948 
+    # FIXME line remove when mod_perl fixes BUG#4948
     $r->notes->set('error-notes' => '');
-    if ($r->uri =~ m{^/adm/lti/(.+)$}) {
-        my $realuri = $1;
-        my %user;
-        my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
-        if (($handle ne '') && ($user{'lti'})) {
-            if ($realuri =~ m{^uploaded/$match_domain/$match_courseid/(default|supplemental)(|_\d+)\.(?:sequence|page)___\d+___.+$}) {
-                if ($user{'ltiuri'} ne $realuri) {
-                    &Apache::lonnet::appenv({'request.lti.uri' => $realuri});
-                }
-                my ($map,$resid,$url) = split(/___/,$realuri);
-                $realuri = &Apache::lonnet::clutter($url).'?symb='.$realuri;
-            } elsif ($realuri =~ m{^res/$match_domain/$match_username/.+\.(?:sequence|page)___\d+___.+$}) {
-                if ($user{'ltiuri'} ne $realuri) {
-                    &Apache::lonnet::appenv({'request.lti.uri' => $realuri});
-                }
-                my ($map,$resid,$url) = split(/___/,$realuri);
-                $realuri = &Apache::lonnet::clutter($url).'?symb='.$realuri;
-            } elsif ($realuri =~ m{^tiny/$match_domain/\w+$}) {
-                $realuri = '/'.$realuri;
-                if ($user{'ltiuri'} ne $realuri) {
-                    &Apache::lonnet::appenv({'request.lti.uri' => $realuri});
-                }
-            } elsif ($realuri =~ m{($match_domain)/($match_courseid)$}) {
-                $realuri = '/adm/navmaps';
-                if ($user{'ltiuri'} ne '') {
-                    &Apache::lonnet::delenv('request.lti.uri');
-                }
-            } else {
-                $realuri = '/'.$realuri;
-                if ($realuri =~ m{/default_\d+\.sequence$}) {
-                    if ($user{'ltiuri'} ne $realuri) {
-                        &Apache::lonnet::appenv({'request.lti.uri' => $realuri});
-                    }
-                    $realuri .= (($realuri =~/\?/)?'&':'?').'navmap=1';
-                } elsif ($realuri =~ m{^/res/.+\.sequence$}) {
-                    if ($user{'ltiuri'} ne $realuri) {
-                        &Apache::lonnet::appenv({'request.lti.uri' => $realuri});
-                    }
-                    $realuri .= (($realuri =~/\?/)?'&':'?').'navmap=1';
-                } elsif ($realuri =~ m{\.page$}) {
-                    if ($user{'ltiuri'} ne $realuri) {
-                        &Apache::lonnet::appenv({'request.lti.uri' => $realuri});
-                    }
-                }
-            }
-            my $host = $r->headers_in->get('Host');
-            if ($host) {
-                my $protocol = 'http';
-                if ($r->get_server_port == 443) {
-                    $protocol = 'https';
+    my $hdrhost = $r->headers_in->get('Host');
+    if (($r->uri eq '/adm/service/passback') ||
+        ($r->uri eq '/adm/service/roster')) {
+        return OK;
+    }
+    if ($r->uri=~m{^/raw/}) {
+        if ($hdrhost) {
+            unless ($hdrhost =~ /^internal\-/) {
+                my $remote_ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP,1);
+                my $lonhost = $r->dir_config('lonHostID');
+                if (&redirect_raw($remote_ip,$lonhost)) {
+                    my $location = 'https://internal-'.$hdrhost.$r->uri;
+                    $r->headers_out->set(Location => $location);
+                    return REDIRECT;
                 }
-                my $location = $protocol.'://'.$host.$realuri;
-                $r->headers_out->set(Location => $location);
-                return REDIRECT;
             }
         }
-    } elsif ($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;
+    }
+    my $alias = &Apache::lonnet::get_proxy_alias();
+    if ($alias) {
+        my $lonhost = $r->dir_config('lonHostID');
+        my $hostname = &Apache::lonnet::hostname($lonhost);
+        my $ssourl = '/adm/sso';
+        if ($r->dir_config('lonOtherAuthenUrl') ne '') {
+            $ssourl = $r->dir_config('lonOtherAuthenUrl');
+        }
+        if (($hdrhost eq $alias) || ($hdrhost eq $hostname)) {
+            my $proxyinfo = &Apache::lonnet::get_proxy_settings($r->dir_config('lonDefDomain'));
+            my ($vpnint,$vpnext);
+            if (ref($proxyinfo) eq 'HASH') {
+                $vpnint = $proxyinfo->{'vpnint'};
+                $vpnext = $proxyinfo->{'vpnext'};
+            }
+            my ($redirect,$remote_ip);
+            if ($hdrhost eq $alias) {
+                $remote_ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP);
+                if (($vpnext && &Apache::lonnet::ip_match($remote_ip,$vpnext)) &&
+                    ($r->uri !~ m{^/adm/(lti|launch)/})) {
+                    $redirect = $hostname;
+                }
+                if ($r->uri eq $ssourl) {
+                    if (&Apache::lonnet::alias_sso($lonhost)) {
+                        undef($redirect);
                     } 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);
+                        $redirect = $hostname;
+                    }
+                }
+                if ($redirect eq $hdrhost) {
+                    undef($redirect);
+                }
+            } elsif ($hdrhost eq $hostname) {
+                $remote_ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP,1);
+                unless (($remote_ip eq '127.0.0.1') || ($remote_ip eq '::1') ||
+                        ($remote_ip eq &Apache::lonnet::get_host_ip($lonhost)) ||
+                        ($r->uri=~m{^/adm/(lti|launch)/}) ||
+                        ($vpnint && &Apache::lonnet::ip_match($remote_ip,$vpnint))) {
+                    $redirect = $alias;
+                    if (($r->uri=~m{^/raw/}) || ($r->uri=~m{^/adm/dns/})) {
+                        my %iphost = &Apache::lonnet::get_iphost();
+                        if (exists($iphost{$remote_ip})) {
+                            undef($redirect);
+                        }
+                    } elsif ($r->uri eq $ssourl) {
+                        unless (&Apache::lonnet::alias_sso($lonhost)) {
+                            undef($redirect);
                         }
                     }
-                    if ($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 = $r->headers_in->get('Host');
-                                    if ($host) {
-                                        my $protocol = 'http';
-                                        if ($r->get_server_port == 443) {
-                                            $protocol = 'https';
-                                        }
-                                        my $location = $protocol.'://'.$host.$realuri;
-                                        $r->headers_out->set(Location => $location);
-                                        return REDIRECT;
-                                    }
-                                }
+                }
+            }
+            if ($redirect) {
+                my $uri = $r->uri;
+                if (($uri eq '/adm/switchserver') || ($uri =~ m{^/Shibboleth.sso/})) {
+                    return DECLINED;
+                }
+                unless (($uri eq '/adm/migrateuser') || ($uri eq $ssourl)) {
+                    my %user;
+                    my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
+                    if (($handle) && ($user{'name'} ne '') && ($user{'domain'} ne '')) {
+                        unless (($user{'name'} eq 'public') && ($user{'domain'} eq 'public')) {
+                            my $dest = '/adm/migrateuser';
+                            my $token = &set_token($r,$dest,$remote_ip,\%user);
+                            unless ($token eq '') {
+                                $r->internal_redirect("$dest?token=$token");
+                                $r->set_handlers('PerlHandler'=> undef);
+                                return DECLINED;
                             }
                         }
                     }
                 }
-            }
-        }
-    } elsif ($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;
+                my $protocol = 'http';
+                my $port = $r->get_server_port();
+                if ($port eq '443') {
+                    $protocol = 'https';
+                }
+                if ($uri =~ m{^(/adm/css/)(.+)(.css)$}) {
+                    $uri = $1.&escape($2).$3;
+                }
+                my $location = $protocol.'://'.$redirect.$uri;
+                if ($r->uri =~ m{^/tiny/$match_domain/\w+$}) {
+                    my $token = &set_token($r,$r->uri);
+                    unless ($token eq '') {
+                        $location .= '?ttoken='.$token;
+                    }
+                } elsif ($r->args) {
+                    $location .= '?'.$r->args;
                 }
+                $r->header_out(Location => $location);
+                return REDIRECT;
             }
         }
     }
+    if ($r->uri =~ m{^/tiny/$match_domain/\w+$}) {
+        my $token = &set_token($r,$r->uri);
+        unless ($token eq '') {
+            $r->args('ttoken='.$token);
+        }
+    }
     if ($r->uri=~m|^(/raw)?/uploaded/|) {
         my $fn = $r->uri();
         $fn=~s/^\/raw//;
@@ -191,9 +170,12 @@ sub handler {
 			 '/userfiles/'.(join('/',@ufile)));
         }
         return OK;
-    } else {
-        return DECLINED;
+    } elsif ($r->uri =~ m{^\Q/adm/wrapper/ext/https:/\E[^/]}) {
+        my $uri = $r->uri;
+        $uri =~ s{^(\Q/adm/wrapper/ext/https:/\E)}{$1/};
+        $r->uri($uri);
     }
+    return DECLINED;
 }
 
 sub redirect_raw {
@@ -223,16 +205,16 @@ sub redirect_raw {
                             my $remintdom = &Apache::lonnet::internet_dom($remprimary);
                             if (ref($replication->{'certreq'}) eq 'ARRAY') {
                                 if (grep(/^\Q$remintdom\E$/,@{$replication->{'certreq'}})) {
-                                    $redirect = 1;
-                                } else {
                                     $redirect = 0;
+                                } else {
+                                    $redirect = 1;
                                 }
                             }
                             if (ref($replication->{'nocertreq'}) eq 'ARRAY') {
                                 if (grep(/^\Q$remintdom\E$/,@{$replication->{'nocertreq'}})) {
-                                    $redirect = 0;
-                                } else {
                                     $redirect = 1;
+                                } else {
+                                    $redirect = 0;
                                 }
                             }
                         }
@@ -242,7 +224,93 @@ sub redirect_raw {
             last;
         }
     }
-    return $redirect;  
+    return $redirect;
+}
+
+sub set_token {
+    my ($r,$dest,$remote_ip,$userref) = @_;
+    my (%info,%user);
+    if ($dest eq '/adm/migrateuser') {
+        return unless (ref($userref) eq 'HASH');
+        %user = %{$userref};
+        %info = ('ip' => $remote_ip,
+                 'domain'    => $user{'domain'},
+                 'username'  => $user{'name'},
+                 'server'    => $r->dir_config('lonHostID'),
+                );
+    }
+    if ($r->args) {
+        foreach my $pair (split(/&/,$r->args)) {
+            my ($name,$value) = split(/=/,$pair);
+            $name = &LONCAPA::unescape($name);
+            next unless (($name eq 'role') || ($name eq 'symb') ||
+                         ($name eq 'ltoken') || ($name eq 'linkkey') ||
+                         ($name eq 'ttoken'));
+            $value =~ tr/+/ /;
+            $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+            $info{$name} = $value;
+        }
+        if ($info{'ttoken'}) {
+            my %current = &Apache::lonnet::tmpget($info{'ttoken'});
+            delete($info{'ttoken'});
+            if ($current{'origurl'} eq $r->uri) {
+                return if (keys(%current));
+            }
+        }
+    }
+#
+# To be able to support deep-linking for a shortened URL, i.e.,
+# /tiny/$dom/$id with (a) linkkey included in POSTed data and
+# data and (b) non-Shibboleth SSO in use, ltoken (or linkprot
+# if sending to /adm/migrateuser), or linkkey are written to a
+# .tmp file in /home/httpd/perl/tmp and the query string is
+# replaced with ttoken=tokenid.  This does mean other POSTed
+# data will be discarded.
+#
+    if ($r->uri =~ m{^/tiny/$match_domain/\w+$}) {
+        unless (($info{'ltoken'}) || ($info{'linkkey'} ne '')) {
+            &Apache::lonacc::get_posted_cgi($r,['linkkey']);
+            if ($env{'form.linkkey'} ne '') {
+                $info{'linkkey'} = $env{'form.linkkey'};
+            }
+        }
+    }
+    if ($dest eq '/adm/migrateuser') {
+        if ($info{'ltoken'}) {
+            my %link_info = &Apache::lonnet::tmpget($info{'ltoken'});
+            if ($link_info{'linkprot'}) {
+                $info{'linkprot'} = $link_info{'linkprot'};
+                foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') {
+                    if ($link_info{$item} ne '') {
+                        $info{$item} = $link_info{$item};
+                    }
+                }
+            }
+            &Apache::lonnet::tmpdel($info{'ltoken'});
+            delete($info{'ltoken'});
+        }
+        unless ($info{'role'}) {
+            if ($user{'role'} ne '') {
+                $info{'role'} = $user{'role'};
+            }
+        }
+        unless ($info{'symb'}) {
+            unless ($r->uri eq '/adm/roles') {
+                $info{'origurl'} = $r->uri;
+            }
+        }
+    }
+    if (($dest eq '/adm/migrateuser') || (keys(%info) > 0)) {
+        unless ($dest eq '/adm/migrateuser') {
+            $info{'origurl'} = $r->uri;
+        }
+        my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
+        unless (($token eq 'con_lost') || ($token eq 'refused') ||
+                ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
+            return $token;
+        }
+    }
+    return;
 }
 
 1;