--- rat/lonpage.pm 2000/09/14 09:26:37 1.3 +++ rat/lonpage.pm 2002/03/26 16:14:51 1.34 @@ -1,22 +1,71 @@ # The LearningOnline Network with CAPA # Page Handler # +# $Id: lonpage.pm,v 1.34 2002/03/26 16:14:51 www 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/ +# # (TeX Content Handler # +# YEAR=2000 # 05/29/00,05/30 Gerd Kortemeyer) -# 08/30,08/31,09/06,09/14 Gerd Kortemeyer +# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23, +# 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16, +# YEAR=2001 +# 08/13/01,08/30,10/1 Gerd Kortemeyer +# 12/16 Scott Harrison +# YEAR=2002 +# 03/19 Gerd Kortemeyer +# +### package Apache::lonpage; use strict; use Apache::Constants qw(:common :http); use Apache::lonnet(); +use Apache::loncommon(); +use Apache::lonxml(); +use HTML::TokeParser; use GDBM_File; # -------------------------------------------------------------- Module Globals my %hash; my @rows; +# ------------------------------------------------------------------ Euclid gcd + +sub euclid { + my ($e,$f)=@_; + my $a; my $b; my $r; + if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; } + while ($r!=0) { + $a=$b; $b=$r; + $r=$a%$b; + } + return $b; +} + # ------------------------------------------------------------ Build page table sub tracetable { @@ -28,11 +77,12 @@ sub tracetable { if (defined($hash{'is_map_'.$rid})) { if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) && (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) { - my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}}; - $sofar= + my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}}; + $sofar= &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}}, '&'.$frid.'&'); - $sofar++; + $sofar++; + if ($hash{'src_'.$frid}) { my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid}); if (($brepriv eq '2') || ($brepriv eq 'F')) { if (defined($rows[$sofar])) { @@ -41,9 +91,11 @@ sub tracetable { $rows[$sofar]=$frid; } } + } } } else { - $sofar++; + $sofar++; + if ($hash{'src_'.$rid}) { my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid}); if (($brepriv eq '2') || ($brepriv eq 'F')) { if (defined($rows[$sofar])) { @@ -52,19 +104,37 @@ sub tracetable { $rows[$sofar]=$rid; } } + } } if (defined($hash{'to_'.$rid})) { - map { - my $now=&tracetable($sofar,$hash{'goesto_'.$_},$beenhere); - if ($now>$further) { $further=$now; } - } split(/\,/,$hash{'to_'.$rid}); + my $mincond=1; + my $next=''; + foreach (split(/\,/,$hash{'to_'.$rid})) { + my $thiscond= + &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); + if ($thiscond>=$mincond) { + if ($next) { + $next.=','.$_.':'.$thiscond; + } else { + $next=$_.':'.$thiscond; + } + if ($thiscond>$mincond) { $mincond=$thiscond; } + } + } + foreach (split(/\,/,$next)) { + my ($linkid,$condval)=split(/\:/,$_); + if ($condval>=$mincond) { + my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere); + if ($now>$further) { $further=$now; } + } + } + } } return $further; } - # ================================================================ Main Handler sub handler { @@ -87,7 +157,7 @@ sub handler { if ($ENV{'request.course.fn'}) { my $fn=$ENV{'request.course.fn'}; if (-e "$fn.db") { - if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT,0640)) { + if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) { # ------------------------------------------------------------------- Hash tied my $firstres=$hash{'map_start_'.$requrl}; my $lastres=$hash{'map_finish_'.$requrl}; @@ -97,42 +167,281 @@ sub handler { @rows=(); &tracetable(0,$firstres,'&'.$lastres.'&'); - $rows[$#rows+1]=''.$lastres; + if ($hash{'src_'.$lastres}) { + my $brepriv= + &Apache::lonnet::allowed('bre',$hash{'src_'.$lastres}); + if (($brepriv eq '2') || ($brepriv eq 'F')) { + $rows[$#rows+1]=''.$lastres; + } + } + +# ------------------------------------------------------------ Add to symb list my $i; - my $maxcols=-1; + my %symbhash=(); + for ($i=0;$i<=$#rows;$i++) { + if ($rows[$i]) { + my @colcont=split(/\&/,$rows[$i]); + foreach (@colcont) { + $symbhash{$hash{'src_'.$_}}=''; + } + } + } + &Apache::lonnet::symblist($requrl,%symbhash); + +# ------------------------------------------------------------------ Page parms + + my $j; + my $lcm=1; + my $contents=0; + my $nforms=0; + my %ssibody=(); my %ssibgcolor=(); my %ssitext=(); my %ssilink=(); my %ssivlink=(); my %ssialink=(); + + my %metalink=(); + my %cellemb=(); + my $allscript=''; + my $allmeta=''; + + my $isxml=0; + my $xmlheader=''; + my $xmlbody=''; + # --------------------------------------------- Get SSI output, post parameters for ($i=0;$i<=$#rows;$i++) { + if ($rows[$i]) { + $contents++; my @colcont=split(/\&/,$rows[$i]); - $maxcols=$#colcont>$maxcols?$#colcont:$maxcols; - map { + $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1)); + foreach (@colcont) { my $src=$hash{'src_'.$_}; - $src=~/\.\w+$/; - $cellemb{$_}=Apache::lonnet::fileembstyle($1); + $src=~/\.(\w+)$/; + $metalink{$_}=$src.'.meta'; + $cellemb{$_}=Apache::loncommon::fileembstyle($1); if ($cellemb{$_} eq 'ssi') { # --------------------------------------------------------- This is an SSI cell - + my $prefix=$_.'_'; + my %posthash=('request.prefix' => $prefix); + if (($ENV{'form.'.$prefix.'submit'}) + || ($ENV{'form.all_submit'})) { + foreach (keys %ENV) { + if ($_=~/^form.$prefix/) { + my $name=$_; + $name=~s/^form.$prefix//; + $posthash{$name}=$ENV{$_}; + } + } + } + my $output=Apache::lonnet::ssi($src,%posthash); + my $parser=HTML::TokeParser->new(\$output); + my $token; + my $thisdir=$src; + my $bodydef=0; + my $thisxml=0; + my @rlinks=(); + if ($output=~/\?xml/) { + $isxml=1; + $thisxml=1; + $output=~ + /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\]*\>/si; + $xmlheader=$1; + } + while ($token=$parser->get_token) { + if ($token->[0] eq 'S') { + if ($token->[1] eq 'a') { + if ($token->[2]->{'href'}) { + $rlinks[$#rlinks+1]= + $token->[2]->{'href'}; + } + } elsif ($token->[1] eq 'img') { + $rlinks[$#rlinks+1]= + $token->[2]->{'src'}; + } elsif ($token->[1] eq 'embed') { + $rlinks[$#rlinks+1]= + $token->[2]->{'src'}; + } elsif ($token->[1] eq 'base') { + $thisdir=$token->[2]->{'href'}; + } elsif ($token->[1] eq 'body') { + $bodydef=1; + $ssibgcolor{$_}=$token->[2]->{'bgcolor'}; + $ssitext{$_}=$token->[2]->{'text'}; + $ssilink{$_}=$token->[2]->{'link'}; + $ssivlink{$_}=$token->[2]->{'vlink'}; + $ssialink{$_}=$token->[2]->{'alink'}; + if ($thisxml) { + $xmlbody=$token->[4]; + } + } elsif ($token->[1] eq 'meta') { + if ($token->[4] !~ m:/>$:) { + $allmeta.="\n".$token->[4].''; + } else { + $allmeta.="\n".$token->[4]; + } + } elsif (($token->[1] eq 'script') && + ($bodydef==0)) { + $allscript.="\n\n" + .$parser->get_text('/script'); + } + } + } + if ($output=~/\]*\>(.*)/si) { + $output=$1; + } + $output=~s/\<\/body\>.*//si; + if ($output=~/\
]*\>//gsi; + $output=~s/\<\/form[^\>]*\>//gsi; + $output=~ + s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([\w\.\:]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi; + } + $thisdir=~s/\/[^\/]*$//; + foreach (@rlinks) { + unless (($_=~/^http:\/\//i) || + ($_=~/^\//) || + ($_=~/^javascript:/i) || + ($_=~/^mailto:/i) || + ($_=~/^\#/)) { + my $newlocation= + &Apache::lonnet::hreflocation($thisdir,$_); + $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/; + } + } +# -------------------------------------------------- Deal with Applet codebases + $output=~s/(\]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei; + $ssibody{$_}=$output; # ---------------------------------------------------------------- End SSI cell } - } @colcont; - + } + } } - if ($maxcols<0) { + unless ($contents) { $r->content_type('text/html'); $r->send_http_header; $r->print('Empty page.'); } else { # ------------------------------------------------------------------ Build page +# ---------------------------------------------------------------- Send headers + if ($isxml) { + $r->content_type('text/xml'); + $r->send_http_header; + $r->print($xmlheader); + } else { + $r->content_type('text/html'); + $r->send_http_header; + $r->print(''); + } +# ------------------------------------------------------------------------ Head + $r->print("\n\n".$allmeta); + $allscript=~ + s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs; + if ($allscript) { + $r->print("\n\n"); + } + $r->print(&Apache::lonxml::registerurl(1,undef)); + $r->print("\n\n"); +# ------------------------------------------------------------------ Start body + if ($isxml) { + $r->print($xmlbody); + } else { + $r->print( + ''); + } +# ------------------------------------------------------------------ Start form + if ($nforms) { + $r->print(''); + } +# ----------------------------------------------------------------- Start table + $r->print(''); + for ($i=0;$i<=$#rows;$i++) { + if ($rows[$i]) { + $r->print("\n"); + my @colcont=split(/\&/,$rows[$i]); + my $avespan=$lcm/($#colcont+1); + for ($j=0;$j<=$#colcont;$j++) { + my $rid=$colcont[$j]; + my $metainfo=''. + ''. + ''. + ''. + ''; + if ( + ($hash{'src_'.$rid}=~/\.(problem|exam|quiz|assess|survey|form)$/) && + (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'}))) { + my ($mapid,$resid)=split(/\./,$rid); + my $symb= + &Apache::lonnet::declutter($hash{'map_id_'.$mapid}). + '___'.$resid.'___'. + &Apache::lonnet::declutter($hash{'src_'.$rid}); + $metainfo.= + ''. + ''. + ''. + ''. + ''. + ''. + ''. + ''. + ''; + } + $metainfo.='

'; + $r->print(''); + } + $r->print(''); + } + } + $r->print("\n
print(' bgcolor="'. + $ssibgcolor{$rid}.'"'); + } + $r->print('>'.$metainfo.'print(' text="'.$ssitext{$rid}.'"'); + } + if ($ssilink{$rid}) { + $r->print(' link="'.$ssilink{$rid}.'"'); + } + if ($ssitext{$rid}) { + $r->print(' vlink="'.$ssivlink{$rid}.'"'); + } + if ($ssialink{$rid}) { + $r->print(' alink="'.$ssialink{$rid}.'"'); + } + + $r->print('>'.$ssibody{$rid}.''); + } elsif ($cellemb{$rid} eq 'img') { + $r->print('>'.$metainfo.''); + } elsif ($cellemb{$rid} eq 'emb') { + $r->print('>'.$metainfo.''); + } + $r->print('
"); +# ---------------------------------------------------------------- Submit, etc. + if ($nforms) { + $r->print( + ''); + } + $r->print(''.&Apache::lonxml::xmlend()); # -------------------------------------------------------------------- End page } # ------------------------------------------------------------- End render page @@ -152,15 +461,112 @@ sub handler { } } } - $ENV{'user.error.msg'}="$requrl:bre:1:1:Course not initialized"; + $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; return HTTP_NOT_ACCEPTABLE; } 1; __END__ +=head1 NAME + +Apache::lonpage - Page Handler + +=head1 SYNOPSIS + +Invoked by /etc/httpd/conf/srm.conf: + + + SetHandler perl-script + PerlHandler Apache::lonpage + + +=head1 INTRODUCTION + +This module renders a .page resource. + +This is part of the LearningOnline Network with CAPA project +described at http://www.lon-capa.org. + +=head1 HANDLER SUBROUTINE + +This routine is called by Apache and mod_perl. + +=over 4 + +=item * + +set document type for header only + +=item * + +tie db file + +=item * + +render page + +=item * + +add to symb list + +=item * + +page parms + +=item * + +Get SSI output, post parameters + +=item * + +SSI cell rendering + +=item * + +Deal with Applet codebases + +=item * + +Build page + +=item * + +send headers + +=item * + +start body + +=item * + +start form + +=item * + +start table + +=item * + +submit element, etc, render page, untie hash + +=back + +=head1 OTHER SUBROUTINES + +=over 4 + +=item * + +euclid() : Euclid's method for determining the greatest common denominator. + +=item * + +tracetable() : Build page table. +=back +=cut