--- loncom/interface/loncommon.pm 2017/03/15 03:39:49 1.1075.2.125 +++ loncom/interface/loncommon.pm 2022/05/30 13:30:03 1.1075.2.161.2.6 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # a pile of common routines # -# $Id: loncommon.pm,v 1.1075.2.125 2017/03/15 03:39:49 raeburn Exp $ +# $Id: loncommon.pm,v 1.1075.2.161.2.6 2022/05/30 13:30:03 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -71,6 +71,7 @@ use Apache::lonuserutils(); use Apache::lonuserstate(); use Apache::courseclassifier(); use LONCAPA qw(:DEFAULT :match); +use HTTP::Request; use DateTime::TimeZone; use DateTime::Locale; use Encode(); @@ -80,6 +81,10 @@ use JSON::DWIW; use LWP::UserAgent; use Crypt::DES; use DynaLoader; # for Crypt::DES version +use File::Copy(); +use File::Path(); +use String::CRC32(); +use Short::URL(); # ---------------------------------------------- Designs use vars qw(%defaultdesign); @@ -194,7 +199,7 @@ BEGIN { { my $langtabfile = $Apache::lonnet::perlvar{'lonTabDir'}. '/language.tab'; - if ( open(my $fh,"<$langtabfile") ) { + if ( open(my $fh,'<',$langtabfile) ) { while (my $line = <$fh>) { next if ($line=~/^\#/); chomp($line); @@ -215,7 +220,7 @@ BEGIN { { my $copyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}. '/copyright.tab'; - if ( open (my $fh,"<$copyrightfile") ) { + if ( open (my $fh,'<',$copyrightfile) ) { while (my $line = <$fh>) { next if ($line=~/^\#/); chomp($line); @@ -229,7 +234,7 @@ BEGIN { { my $sourcecopyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}. '/source_copyright.tab'; - if ( open (my $fh,"<$sourcecopyrightfile") ) { + if ( open (my $fh,'<',$sourcecopyrightfile) ) { while (my $line = <$fh>) { next if ($line =~ /^\#/); chomp($line); @@ -243,7 +248,7 @@ BEGIN { # -------------------------------------------------------------- default domain designs my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors'; my $designfile = $designdir.'/default.tab'; - if ( open (my $fh,"<$designfile") ) { + if ( open (my $fh,'<',$designfile) ) { while (my $line = <$fh>) { next if ($line =~ /^\#/); chomp($line); @@ -257,7 +262,7 @@ BEGIN { { my $categoryfile = $Apache::lonnet::perlvar{'lonTabDir'}. '/filecategories.tab'; - if ( open (my $fh,"<$categoryfile") ) { + if ( open (my $fh,'<',$categoryfile) ) { while (my $line = <$fh>) { next if ($line =~ /^\#/); chomp($line); @@ -272,7 +277,7 @@ BEGIN { { my $typesfile = $Apache::lonnet::perlvar{'lonTabDir'}. '/filetypes.tab'; - if ( open (my $fh,"<$typesfile") ) { + if ( open (my $fh,'<',$typesfile) ) { while (my $line = <$fh>) { next if ($line =~ /^\#/); chomp($line); @@ -425,7 +430,7 @@ sub studentbrowser_javascript { OFFLOAD - } } } } @@ -7897,6 +8537,7 @@ OFFLOAD '; } + $result .= ''."\n"; return $result.''; } @@ -7965,7 +8606,8 @@ sub print_suppression { } my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; - my $blocked = &blocking_status('printout',$cnum,$cdom,undef,1); + my $clientip = &Apache::lonnet::get_requestor_ip(); + my $blocked = &blocking_status('printout',$clientip,$cnum,$cdom,undef,1); if ($blocked) { my $checkrole = "cm./$cdom/$cnum"; if ($env{'request.course.sec'} ne '') { @@ -8082,6 +8724,14 @@ $args - additional optional args support to lonhtmlcommon::breadcrumbs group -> includes the current group, if page is for a specific group + use_absolute -> for request for external resource or syllabus, this + will contain https:// if server uses + https (as per hosts.tab), but request is for http + hostname -> hostname, originally from $r->hostname(), (optional). + links_disabled -> Links in primary and secondary menus are disabled + (Can enable them once page has loaded - see lonroles.pm + for an example). + links_target -> Target for links, e.g., _parent (optional). =back @@ -8094,12 +8744,82 @@ sub start_page { #&Apache::lonnet::logthis("start_page ".join(':',caller(0))); $env{'internal.start_page'}++; - my ($result,@advtools); + my ($result,@advtools,$ltiscope,$ltiuri,%ltimenu,$menucoll,%menu); if (! exists($args->{'skip_phases'}{'head'}) ) { $result .= &xml_begin($args->{'frameset'}) . &headtag($title, $head_extra, $args); } - + + if (($env{'request.course.id'}) && ($env{'request.lti.login'})) { + if ($env{'course.'.$env{'request.course.id'}.'.lti.override'}) { + unless ($env{'course.'.$env{'request.course.id'}.'.lti.topmenu'}) { + $args->{'no_primary_menu'} = 1; + } + unless ($env{'course.'.$env{'request.course.id'}.'.lti.inlinemenu'}) { + $args->{'no_inline_menu'} = 1; + } + if ($env{'course.'.$env{'request.course.id'}.'.lti.lcmenu'}) { + map { $ltimenu{$_} = 1; } split(/,/,$env{'course.'.$env{'request.course.id'}.'.lti.lcmenu'}); + } + } else { + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider'); + if (ref($lti{$env{'request.lti.login'}}) eq 'HASH') { + unless ($lti{$env{'request.lti.login'}}{'topmenu'}) { + $args->{'no_primary_menu'} = 1; + } + unless ($lti{$env{'request.lti.login'}}{'inlinemenu'}) { + $args->{'no_inline_menu'} = 1; + } + if (ref($lti{$env{'request.lti.login'}}{'lcmenu'}) eq 'ARRAY') { + map { $ltimenu{$_} = 1; } @{$lti{$env{'request.lti.login'}}{'lcmenu'}}; + } + } + } + ($ltiscope,$ltiuri) = &LONCAPA::ltiutils::lti_provider_scope($env{'request.lti.uri'}, + $env{'course.'.$env{'request.course.id'}.'.domain'}, + $env{'course.'.$env{'request.course.id'}.'.num'}); + } elsif ($env{'request.course.id'}) { + my $expiretime=600; + if ((time-$env{'course.'.$env{'request.course.id'}.'.last_cache'}) > $expiretime) { + &Apache::lonnet::coursedescription($env{'request.course.id'},{'freshen_cache' => 1}); + } + my ($deeplinkmenu,$menuref); + ($menucoll,$deeplinkmenu,$menuref) = &menucoll_in_effect(); + if ($menucoll) { + if (ref($menuref) eq 'HASH') { + %menu = %{$menuref}; + } + if ($menu{'top'} eq 'n') { + $args->{'no_primary_menu'} = 1; + } + if ($menu{'inline'} eq 'n') { + unless (&Apache::lonnet::allowed('opa')) { + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; + my $crstype = &course_type(); + my $now = time; + my $ccrole; + if ($crstype eq 'Community') { + $ccrole = 'co'; + } else { + $ccrole = 'cc'; + } + if ($env{'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum}) { + my ($start,$end) = split(/\./,$env{'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum}); + if ((($start) && ($start<0)) || + (($end) && ($end<$now)) || + (($start) && ($now<$start))) { + $args->{'no_inline_menu'} = 1; + } + } else { + $args->{'no_inline_menu'} = 1; + } + } + } + } + } + if (! exists($args->{'skip_phases'}{'body'}) ) { if ($args->{'frameset'}) { my $attr_string = &make_attr_string($args->{'force_register'}, @@ -8112,7 +8832,8 @@ sub start_page { $args->{'only_body'}, $args->{'domain'}, $args->{'force_register'}, $args->{'no_nav_bar'}, $args->{'bgcolor'}, $args->{'no_inline_link'}, - $args, \@advtools); + $args, \@advtools, + $ltiscope,$ltiuri,\%ltimenu,$menucoll,\%menu); } } @@ -8147,7 +8868,8 @@ sub start_page { } my $menulink; # if arg: bread_crumbs_nomenu is true pass 0 as $menulink item. - if (exists($args->{'bread_crumbs_nomenu'})) { + if ((exists($args->{'bread_crumbs_nomenu'})) || + ($ltiscope eq 'map') || ($ltiscope eq 'resource')) { $menulink = 0; } else { undef($menulink); @@ -8155,7 +8877,7 @@ sub start_page { #if bread_crumbs_component exists show it as headline else show only the breadcrumbs if(exists($args->{'bread_crumbs_component'})){ $result .= &Apache::lonhtmlcommon::breadcrumbs($args->{'bread_crumbs_component'},'',$menulink); - }else{ + } else { $result .= &Apache::lonhtmlcommon::breadcrumbs('','',$menulink); } } elsif (($env{'environment.remote'} eq 'on') && @@ -8199,6 +8921,103 @@ sub end_page { return $result; } +sub menucoll_in_effect { + my ($menucoll,$deeplinkmenu,%menu); + if ($env{'request.course.id'}) { + $menucoll = $env{'course.'.$env{'request.course.id'}.'.menudefault'}; + if ($env{'request.deeplink.login'}) { + my ($deeplink_symb,$deeplink,$check_login_symb); + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + if ($env{'request.noversionuri'} =~ m{^/(res|uploaded)/}) { + if ($env{'request.noversionuri'} =~ /\.(page|sequence)$/) { + my $navmap = Apache::lonnavmaps::navmap->new(); + if (ref($navmap)) { + $deeplink = $navmap->get_mapparam(undef, + &Apache::lonnet::declutter($env{'request.noversionuri'}), + '0.deeplink'); + } else { + $check_login_symb = 1; + } + } else { + my $symb=&Apache::lonnet::symbread(); + if ($symb) { + $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb); + } else { + $check_login_symb = 1; + } + } + } else { + $check_login_symb = 1; + } + if ($check_login_symb) { + $deeplink_symb = &deeplink_login_symb($cnum,$cdom); + if ($deeplink_symb =~ /\.(page|sequence)$/) { + my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($deeplink_symb))[2]); + my $navmap = Apache::lonnavmaps::navmap->new(); + if (ref($navmap)) { + $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink'); + } + } else { + $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$deeplink_symb); + } + } + if ($deeplink ne '') { + my ($state,$others,$listed,$scope,$protect,$display,$target) = split(/,/,$deeplink); + if ($display =~ /^\d+$/) { + $deeplinkmenu = 1; + $menucoll = $display; + } + } + } + if ($menucoll) { + %menu = &page_menu($env{'course.'.$env{'request.course.id'}.'.menucollections'},$menucoll); + } + } + return ($menucoll,$deeplinkmenu,\%menu); +} + +sub deeplink_login_symb { + my ($cnum,$cdom) = @_; + my $login_symb; + if ($env{'request.deeplink.login'}) { + $login_symb = &symb_from_tinyurl($env{'request.deeplink.login'},$cnum,$cdom); + } + return $login_symb; +} + +sub symb_from_tinyurl { + my ($url,$cnum,$cdom) = @_; + if ($url =~ m{^\Q/tiny/$cdom/\E(\w+)$}) { + my $key = $1; + my ($tinyurl,$login); + my ($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 ($tinyurl ne '') { + my ($cnumreq,$symb) = split(/\&/,$tinyurl); + if (wantarray) { + return ($cnumreq,$symb); + } elsif ($cnumreq eq $cnum) { + return $symb; + } + } + } + if (wantarray) { + return (); + } else { + return; + } +} + sub wishlist_window { return(<<'ENDWISHLIST'); @@ -8307,7 +9134,7 @@ ENDADHOC } sub modal_adhoc_inner { - my ($funcname,$width,$height,$content)=@_; + my ($funcname,$width,$height,$content,$possmathjax)=@_; my $innerwidth=$width-20; $content=&js_ready( &start_page('Dialog',undef,{'only_body'=>1,'bgcolor'=>'#FFFFFF'}). @@ -8316,12 +9143,12 @@ sub modal_adhoc_inner { &end_scrollbox(). &end_page() ); - return &modal_adhoc_script($funcname,$width,$height,$content); + return &modal_adhoc_script($funcname,$width,$height,$content,$possmathjax); } sub modal_adhoc_window { - my ($funcname,$width,$height,$content,$linktext)=@_; - return &modal_adhoc_inner($funcname,$width,$height,$content). + my ($funcname,$width,$height,$content,$linktext,$possmathjax)=@_; + return &modal_adhoc_inner($funcname,$width,$height,$content,$possmathjax). "".$linktext.""; } @@ -8387,8 +9214,9 @@ sub end_togglebox { } sub LCprogressbar_script { - my ($id)=@_; - return(< // ENDPROGRESS + } else { + return(< +// + +ENDPROGRESS + } } sub LCprogressbarUpdate_script { return(< .ui-progressbar { position:relative; } +.progress-label {position: absolute; width: 100%; text-align: center; top: 1px; font-weight: bold; text-shadow: 1px 1px 0 #fff;margin: 0; line-height: 200%; } .pblabel { position: absolute; width: 100%; text-align: center; line-height: 1.9em; } @@ -8427,37 +9277,54 @@ my $LCidcnt; my $LCcurrentid; sub LCprogressbar { - my ($r)=(@_); + my ($r,$number_to_do,$preamble)=@_; $LClastpercent=0; $LCidcnt++; $LCcurrentid=$$.'_'.$LCidcnt; - my $starting=&mt('Starting'); - my $content=(< $starting ENDPROGBAR - &r_print($r,$content.&LCprogressbar_script($LCcurrentid)); + } else { + $starting=&mt('Loading...'); + $LClastpercent='false'; + $content=(< +
$starting
+ +ENDPROGBAR + } + &r_print($r,$content.&LCprogressbar_script($LCcurrentid,$number_to_do)); } sub LCprogressbarUpdate { - my ($r,$val,$text)=@_; - unless ($val) { - if ($LClastpercent) { - $val=$LClastpercent; - } else { - $val=0; - } + my ($r,$val,$text,$number_to_do)=@_; + if ($number_to_do) { + unless ($val) { + if ($LClastpercent) { + $val=$LClastpercent; + } else { + $val=0; + } + } + if ($val<0) { $val=0; } + if ($val>100) { $val=0; } + $LClastpercent=$val; + unless ($text) { $text=$val.'%'; } + } else { + $val = 'false'; } - if ($val<0) { $val=0; } - if ($val>100) { $val=0; } - $LClastpercent=$val; - unless ($text) { $text=$val.'%'; } $text=&js_ready($text); &r_print($r,< // ENDUPDATE @@ -8642,14 +9509,21 @@ function expand_div(caller) { sub simple_error_page { my ($r,$title,$msg,$args) = @_; + my %displayargs; if (ref($args) eq 'HASH') { if (!$args->{'no_auto_mt_msg'}) { $msg = &mt($msg); } + if ($args->{'only_body'}) { + $displayargs{'only_body'} = 1; + } + if ($args->{'no_nav_bar'}) { + $displayargs{'no_nav_bar'} = 1; + } } else { $msg = &mt($msg); } my $page = - &Apache::loncommon::start_page($title). + &Apache::loncommon::start_page($title,'',\%displayargs). '

'.$msg.'

'. &Apache::loncommon::end_page(); if (ref($r)) { @@ -9574,7 +10448,7 @@ sub get_secgrprole_info { } sub user_picker { - my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context,$fixeddom) = @_; + my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context,$fixeddom,$noinstd) = @_; my $currdom = $dom; my @alldoms = &Apache::lonnet::all_domains(); if (@alldoms == 1) { @@ -9639,10 +10513,12 @@ sub user_picker { &html_escape(\%html_lt); &js_escape(\%js_lt); my $domform; + my $allow_blank = 1; if ($fixeddom) { - $domform = &select_dom_form($currdom,'srchdomain',1,1,undef,[$currdom]); + $allow_blank = 0; + $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1,undef,[$currdom]); } else { - $domform = &select_dom_form($currdom,'srchdomain',1,1); + $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1); } my $srchinsel = ' '."\n". + ''. &mt('Type in the letters/numbers shown below').' '. ''. - '
'. + '
'. 'captcha'; last; } } + if ($output eq '') { + &Apache::lonnet::logthis("Failed to create Captcha code after $tries attempts."); + } return $output; } @@ -16662,7 +17831,8 @@ sub check_captcha { sub create_recaptcha { my ($pubkey,$version) = @_; if ($version >= 2) { - return '
'; + return '
'. + '
'; } else { my $use_ssl; if ($ENV{'SERVER_PORT'} == 443) { @@ -16680,13 +17850,14 @@ sub create_recaptcha { sub check_recaptcha { my ($privkey,$version) = @_; my $captcha_chk; + my $ip = &Apache::lonnet::get_requestor_ip(); if ($version >= 2) { my $ua = LWP::UserAgent->new; $ua->timeout(10); my %info = ( secret => $privkey, response => $env{'form.g-recaptcha-response'}, - remoteip => $ENV{'REMOTE_ADDR'}, + remoteip => $ip, ); my $response = $ua->post('https://www.google.com/recaptcha/api/siteverify',\%info); if ($response->is_success) { @@ -16702,7 +17873,7 @@ sub check_recaptcha { my $captcha_result = $captcha->check_answer( $privkey, - $ENV{'REMOTE_ADDR'}, + $ip, $env{'form.recaptcha_challenge_field'}, $env{'form.recaptcha_response_field'}, ); @@ -16751,15 +17922,34 @@ sub cleanup_html { # Checks for critical messages and returns a redirect url if one exists. # $interval indicates how often to check for messages. +# $context is the calling context -- roles, grades, contents, menu or flip. sub critical_redirect { - my ($interval) = @_; + my ($interval,$context) = @_; + unless (($env{'user.domain'} ne '') && ($env{'user.name'} ne '')) { + return (); + } if ((time-$env{'user.criticalcheck.time'})>$interval) { + if (($env{'request.course.id'}) && (($context eq 'flip') || ($context eq 'contents'))) { + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; + my $blocked = &blocking_status('alert',undef,$cnum,$cdom,undef,1); + if ($blocked) { + my $checkrole = "cm./$cdom/$cnum"; + if ($env{'request.course.sec'} ne '') { + $checkrole .= "/$env{'request.course.sec'}"; + } + unless ((&Apache::lonnet::allowed('evb',undef,undef,$checkrole)) && + ($env{'request.role'} !~ m{^st\./$cdom/$cnum})) { + return; + } + } + } my @what=&Apache::lonnet::dump('critical', $env{'user.domain'}, $env{'user.name'}); &Apache::lonnet::appenv({'user.criticalcheck.time'=>time}); my $redirecturl; if ($what[0]) { - if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) { + if (($what[0] ne 'con_lost') && ($what[0] ne 'no_such_host') && ($what[0]!~/^error\:/)) { $redirecturl='/adm/email?critical=display'; my $url=&Apache::lonnet::absolute_url().$redirecturl; return (1, $url); @@ -16819,6 +18009,342 @@ sub des_decrypt { return $plaintext; } +sub get_requested_shorturls { + my ($cdom,$cnum,$navmap) = @_; + return unless (ref($navmap)); + my ($numnew,$errors); + my @toshorten = &Apache::loncommon::get_env_multiple('form.addtiny'); + if (@toshorten) { + my (%maps,%resources,%titles); + &Apache::loncourserespicker::enumerate_course_contents($navmap,\%maps,\%resources,\%titles, + 'shorturls',$cdom,$cnum); + if (keys(%resources)) { + my %tocreate; + foreach my $item (sort {$a <=> $b} (@toshorten)) { + my $symb = $resources{$item}; + if ($symb) { + $tocreate{$cnum.'&'.$symb} = 1; + } + } + if (keys(%tocreate)) { + ($numnew,$errors) = &make_short_symbs($cdom,$cnum, + \%tocreate); + } + } + } + return ($numnew,$errors); +} + +sub make_short_symbs { + my ($cdom,$cnum,$tocreateref,$lockuser) = @_; + my ($numnew,@errors); + if (ref($tocreateref) eq 'HASH') { + my %tocreate = %{$tocreateref}; + if (keys(%tocreate)) { + my %coursetiny = &Apache::lonnet::dump('tiny',$cdom,$cnum); + my $su = Short::URL->new(no_vowels => 1); + my $init = ''; + my (%newunique,%addcourse,%courseonly,%failed); + # get lock on tiny db + my $now = time; + if ($lockuser eq '') { + $lockuser = $env{'user.name'}.':'.$env{'user.domain'}; + } + my $lockhash = { + "lock\0$now" => $lockuser, + }; + my $tries = 0; + my $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom); + my ($code,$error); + while (($gotlock ne 'ok') && ($tries<3)) { + $tries ++; + sleep 1; + $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom); + } + if ($gotlock eq 'ok') { + $init = &shorten_symbs($cdom,$init,$su,\%coursetiny,\%tocreate,\%newunique, + \%addcourse,\%courseonly,\%failed); + if (keys(%failed)) { + my $numfailed = scalar(keys(%failed)); + push(@errors,&mt('error: could not obtain unique six character URL for [quant,_1,resource]',$numfailed)); + } + if (keys(%newunique)) { + my $putres = &Apache::lonnet::newput_dom('tiny',\%newunique,$cdom); + if ($putres eq 'ok') { + $numnew = scalar(keys(%newunique)); + my $newputres = &Apache::lonnet::newput('tiny',\%addcourse,$cdom,$cnum); + unless ($newputres eq 'ok') { + push(@errors,&mt('error: could not store course look-up of short URLs')); + } + } else { + push(@errors,&mt('error: could not store unique six character URLs')); + } + } + my $dellockres = &Apache::lonnet::del_dom('tiny',["lock\0$now"],$cdom); + unless ($dellockres eq 'ok') { + push(@errors,&mt('error: could not release lockfile')); + } + } else { + push(@errors,&mt('error: could not obtain lockfile')); + } + if (keys(%courseonly)) { + my $result = &Apache::lonnet::newput('tiny',\%courseonly,$cdom,$cnum); + if ($result ne 'ok') { + push(@errors,&mt('error: could not update course look-up of short URLs')); + } + } + } + } + return ($numnew,\@errors); +} + +sub shorten_symbs { + my ($cdom,$init,$su,$coursetiny,$tocreate,$newunique,$addcourse,$courseonly,$failed) = @_; + return unless ((ref($su)) && (ref($coursetiny) eq 'HASH') && (ref($tocreate) eq 'HASH') && + (ref($newunique) eq 'HASH') && (ref($addcourse) eq 'HASH') && + (ref($courseonly) eq 'HASH') && (ref($failed) eq 'HASH')); + my (%possibles,%collisions); + foreach my $key (keys(%{$tocreate})) { + my $num = String::CRC32::crc32($key); + my $tiny = $su->encode($num,$init); + if ($tiny) { + $possibles{$tiny} = $key; + } + } + if (!$init) { + $init = 1; + } else { + $init ++; + } + if (keys(%possibles)) { + my @posstiny = keys(%possibles); + my $configuname = &Apache::lonnet::get_domainconfiguser($cdom); + my %currtiny = &Apache::lonnet::get('tiny',\@posstiny,$cdom,$configuname); + if (keys(%currtiny)) { + foreach my $key (keys(%currtiny)) { + next if ($currtiny{$key} eq ''); + if ($currtiny{$key} eq $possibles{$key}) { + my ($tcnum,$tsymb) = split(/\&/,$currtiny{$key}); + unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) { + $courseonly->{$tsymb} = $key; + } + } else { + $collisions{$possibles{$key}} = 1; + } + delete($possibles{$key}); + } + } + foreach my $key (keys(%possibles)) { + $newunique->{$key} = $possibles{$key}; + my ($tcnum,$tsymb) = split(/\&/,$possibles{$key}); + unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) { + $addcourse->{$tsymb} = $key; + } + } + } + if (keys(%collisions)) { + if ($init <5) { + if (!$init) { + $init = 1; + } else { + $init ++; + } + $init = &shorten_symbs($cdom,$init,$su,$coursetiny,\%collisions, + $newunique,$addcourse,$courseonly,$failed); + } else { + foreach my $key (keys(%collisions)) { + $failed->{$key} = 1; + $failed->{$key} = 1; + } + } + } + return $init; +} + +sub is_nonframeable { + my ($url,$absolute,$hostname,$ip,$nocache) = @_; + my ($remprotocol,$remhost) = ($url =~ m{^(https?)\://(([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,})}i); + return if (($remprotocol eq '') || ($remhost eq '')); + + $remprotocol = lc($remprotocol); + $remhost = lc($remhost); + my $remport = 80; + if ($remprotocol eq 'https') { + $remport = 443; + } + my ($result,$cached) = &Apache::lonnet::is_cached_new('noiframe',$remhost.':'.$remport); + if ($cached) { + unless ($nocache) { + if ($result) { + return 1; + } else { + return 0; + } + } + } + my $uselink; + my $request = new HTTP::Request('HEAD',$url); + my $ua = LWP::UserAgent->new; + $ua->timeout(5); + my $response=$ua->request($request); + if ($response->is_success()) { + my $secpolicy = lc($response->header('content-security-policy')); + my $xframeop = lc($response->header('x-frame-options')); + $secpolicy =~ s/^\s+|\s+$//g; + $xframeop =~ s/^\s+|\s+$//g; + if (($secpolicy ne '') || ($xframeop ne '')) { + my $remotehost = $remprotocol.'://'.$remhost; + my ($origin,$protocol,$port); + if ($ENV{'SERVER_PORT'} =~/^\d+$/) { + $port = $ENV{'SERVER_PORT'}; + } else { + $port = 80; + } + if ($absolute eq '') { + $protocol = 'http:'; + if ($port == 443) { + $protocol = 'https:'; + } + $origin = $protocol.'//'.lc($hostname); + } else { + $origin = lc($absolute); + ($protocol,$hostname) = ($absolute =~ m{^(https?:)//([^/]+)$}); + } + if (($secpolicy) && ($secpolicy =~ /\Qframe-ancestors\E([^;]*)(;|$)/)) { + my $framepolicy = $1; + $framepolicy =~ s/^\s+|\s+$//g; + my @policies = split(/\s+/,$framepolicy); + if (@policies) { + if (grep(/^\Q'none'\E$/,@policies)) { + $uselink = 1; + } else { + $uselink = 1; + if ((grep(/^\Q*\E$/,@policies)) || (grep(/^\Q$protocol\E$/,@policies)) || + (($origin ne '') && (grep(/^\Q$origin\E$/,@policies))) || + (($ip ne '') && (grep(/^\Q$ip\E$/,@policies)))) { + undef($uselink); + } + if ($uselink) { + if (grep(/^\Q'self'\E$/,@policies)) { + if (($origin ne '') && ($remotehost eq $origin)) { + undef($uselink); + } + } + } + if ($uselink) { + my @possok; + if ($ip ne '') { + push(@possok,$ip); + } + my $hoststr = ''; + foreach my $part (reverse(split(/\./,$hostname))) { + if ($hoststr eq '') { + $hoststr = $part; + } else { + $hoststr = "$part.$hoststr"; + } + if ($hoststr eq $hostname) { + push(@possok,$hostname); + } else { + push(@possok,"*.$hoststr"); + } + } + if (@possok) { + foreach my $poss (@possok) { + last if (!$uselink); + foreach my $policy (@policies) { + if ($policy =~ m{^(\Q$protocol\E//|)\Q$poss\E(\Q:$port\E|)$}) { + undef($uselink); + last; + } + } + } + } + } + } + } + } elsif ($xframeop ne '') { + $uselink = 1; + my @policies = split(/\s*,\s*/,$xframeop); + if (@policies) { + unless (grep(/^deny$/,@policies)) { + if ($origin ne '') { + if (grep(/^sameorigin$/,@policies)) { + if ($remotehost eq $origin) { + undef($uselink); + } + } + if ($uselink) { + foreach my $policy (@policies) { + if ($policy =~ /^allow-from\s*(.+)$/) { + my $allowfrom = $1; + if (($allowfrom ne '') && ($allowfrom eq $origin)) { + undef($uselink); + last; + } + } + } + } + } + } + } + } + } + } + if ($nocache) { + if ($cached) { + my $devalidate; + if ($uselink && !$result) { + $devalidate = 1; + } elsif (!$uselink && $result) { + $devalidate = 1; + } + if ($devalidate) { + &Apache::lonnet::devalidate_cache_new('noiframe',$remhost.':'.$remport); + } + } + } else { + if ($uselink) { + $result = 1; + } else { + $result = 0; + } + &Apache::lonnet::do_cache_new('noiframe',$remhost.':'.$remport,$result,3600); + } + return $uselink; +} + +sub page_menu { + my ($menucolls,$menunum) = @_; + my %menu; + foreach my $item (split(/;/,$menucolls)) { + my ($num,$value) = split(/\%/,$item); + if ($num eq $menunum) { + my @entries = split(/\&/,$value); + foreach my $entry (@entries) { + my ($name,$fields) = split(/=/,$entry); + if (($name eq 'top') || ($name eq 'inline') || ($name eq 'foot') || ($name eq 'main')) { + $menu{$name} = $fields; + } else { + my @shown; + if ($fields =~ /,/) { + @shown = split(/,/,$fields); + } else { + @shown = ($fields); + } + if (@shown) { + foreach my $field (@shown) { + next if ($field eq ''); + $menu{$field} = 1; + } + } + } + } + } + } + return %menu; +} + 1; __END__;