--- rat/lonpage.pm 2000/09/16 17:42:01 1.6 +++ rat/lonpage.pm 2012/11/30 18:16:53 1.98 @@ -1,18 +1,50 @@ # The LearningOnline Network with CAPA # Page Handler # -# (TeX Content Handler +# $Id: lonpage.pm,v 1.98 2012/11/30 18:16:53 raeburn Exp $ # -# 05/29/00,05/30 Gerd Kortemeyer) -# 08/30,08/31,09/06,09/14,09/15,09/16 Gerd Kortemeyer +# 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::lonpage; use strict; use Apache::Constants qw(:common :http); -use Apache::lonnet(); +use Apache::lonnet; +use Apache::loncommon(); +use Apache::lonxml(); +use Apache::lonlocal; +use Apache::lonmenu; use HTML::TokeParser; use GDBM_File; +use Apache::lonsequence; +use lib '/home/httpd/lib/perl/'; +use LONCAPA; + # -------------------------------------------------------------- Module Globals my %hash; @@ -36,48 +68,70 @@ sub euclid { sub tracetable { my ($sofar,$rid,$beenhere)=@_; my $further=$sofar; + my $randomout=0; + unless ($env{'request.role.adv'}) { + $randomout = $hash{'randomout_'.$rid}; + } unless ($beenhere=~/\&$rid\&/) { - $beenhere.=$rid.'&'; - - 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}}; - $sofar= - &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}}, - '&'.$frid.'&'); - $sofar++; - if ($hash{'src_'.$frid}) { - my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid}); - if (($brepriv eq '2') || ($brepriv eq 'F')) { - if (defined($rows[$sofar])) { - $rows[$sofar].='&'.$frid; - } else { - $rows[$sofar]=$frid; - } - } - } - } - } else { - $sofar++; - if ($hash{'src_'.$rid}) { - my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid}); - if (($brepriv eq '2') || ($brepriv eq 'F')) { - if (defined($rows[$sofar])) { - $rows[$sofar].='&'.$rid; - } else { - $rows[$sofar]=$rid; - } - } - } - } - - if (defined($hash{'to_'.$rid})) { - map { - my $now=&tracetable($sofar,$hash{'goesto_'.$_},$beenhere); - if ($now>$further) { $further=$now; } - } split(/\,/,$hash{'to_'.$rid}); - } + $beenhere.=$rid.'&'; + unless ($randomout) { + if (defined($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}}; + $sofar= + &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}}, + '&'.$frid.$beenhere); + $sofar++; + if ($hash{'src_'.$frid}) { + my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid}); + if (($brepriv eq '2') || ($brepriv eq 'F')) { + if (defined($rows[$sofar])) { + $rows[$sofar].='&'.$frid; + } else { + $rows[$sofar]=$frid; + } + } + } + } + } else { + $sofar++; + if ($hash{'src_'.$rid}) { + my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid}); + if (($brepriv eq '2') || ($brepriv eq 'F')) { + if (defined($rows[$sofar])) { + $rows[$sofar].='&'.$rid; + } else { + $rows[$sofar]=$rid; + } + } + } + } + } + + if (defined($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 $further; } @@ -90,21 +144,44 @@ sub handler { # ------------------------------------------- Set document type for header only if ($r->header_only) { - if ($ENV{'browser.mathml'}) { - $r->content_type('text/xml'); + if ($env{'browser.mathml'}) { + &Apache::loncommon::content_type($r,'text/xml'); } else { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); } $r->send_http_header; return OK; } - - my $requrl=$r->uri; + + &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, + ['forceselect','launch']); + my $number_of_columns = 1; + my $requrl=$r->uri; + my $target = $env{'form.grade_target'}; + +# Short term solution: define target as 'tex_answer' when retrieving answers +# for resources in a .page when generating printouts. +# A better long-term fix would be to modify the way problem rendering, and +# answer rendering are retrieved for individual resources when printing a .page, +# so rendered problem and answer are sequential for individual resources in +# the .page +# + if ($target eq 'answer') { + if ($env{'form.answer_output_mode'} eq 'tex') { + $target = 'tex_answer'; + } + } +# &Apache::lonnet::logthis("Got a target of $target"); + if ($target eq 'meta') { + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + return OK; + } # ----------------------------------------------------------------- Tie db file - if ($ENV{'request.course.fn'}) { - my $fn=$ENV{'request.course.fn'}; + if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) { + 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_'.$requrl}; @@ -113,19 +190,34 @@ sub handler { @rows=(); - &tracetable(0,$firstres,'&'.$lastres.'&'); - if ($hash{'src_'.$lastres}) { - my $brepriv= - &Apache::lonnet::allowed('bre',$hash{'src_'.$lastres}); - if (($brepriv eq '2') || ($brepriv eq 'F')) { - $rows[$#rows+1]=''.$lastres; + &tracetable(0,$firstres,'&'); + +# ------------------------------------------------------------ Add to symb list + + my $i; + my %symbhash=(); + for ($i=0;$i<=$#rows;$i++) { + if ($rows[$i]) { + my @colcont=split(/\&/,$rows[$i]); + foreach my $rid (@colcont) { + my ($mapid,$resid)=split(/\./,$rid); + $symbhash{$hash{'src_'.$rid}}= + [$hash{'src_'.$rid},$resid]; + } } } + &Apache::lonnet::symblist($requrl,%symbhash); + +# ------------------------------------------------------------------ Page parms - my $i; my $j; my $lcm=1; my $contents=0; + my $nforms=0; + my $nuploads=0; + my %turninpaths; + my %multiresps; + my $turninparent; my %ssibody=(); my %ssibgcolor=(); @@ -133,8 +225,16 @@ sub handler { my %ssilink=(); my %ssivlink=(); my %ssialink=(); + my %cellemb=(); + my $allscript=''; + my $allmeta=''; + + my $isxml=0; + my $xmlheader=''; + my $xmlbody=''; + # --------------------------------------------- Get SSI output, post parameters for ($i=0;$i<=$#rows;$i++) { @@ -142,88 +242,327 @@ sub handler { $contents++; my @colcont=split(/\&/,$rows[$i]); $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1)); - map { + foreach (@colcont) { my $src=$hash{'src_'.$_}; - $src=~/\.(\w+)$/; - $cellemb{$_}=Apache::lonnet::fileembstyle($1); + my ($extension)=($src=~/\.(\w+)$/); + if ($hash{'encrypted_'.$_}) { + $src=&Apache::lonenc::encrypted($src); + } + $cellemb{$_}= + &Apache::loncommon::fileembstyle($extension); if ($cellemb{$_} eq 'ssi') { # --------------------------------------------------------- This is an SSI cell + my ($mapid,$resid)=split(/\./,$_); + my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src); + my $prefix=$_.'_'; - my %posthash=('request.prefix' => $prefix); - map { - if ($_=~/^form.$prefix/) { - my $name=$_; - $name=~s/^form.$prefix//; - $posthash{$name}=$ENV{$_}; - } - } keys %ENV; + my %posthash=('request.prefix' => $prefix, + 'LONCAPA_INTERNAL_no_discussion' => 'true', + 'symb' => $symb); + if (($env{'form.grade_target'} eq 'tex') || + ($env{'form.answer_output_mode'} eq 'tex')) { + $posthash{'grade_target'}=$env{'form.grade_target'}; + $posthash{'textwidth'}=$env{'form.textwidth'}; + $posthash{'problem_split'}=$env{'form.problem_split'}; + $posthash{'latex_type'}=$env{'form.latex_type'}; + $posthash{'rndseed'}=$env{'form.rndseed'}; + $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'}; + } + my $submitted=exists($env{'form.all_submit'}); + if (!$submitted) { + foreach my $key (keys(%env)) { + if ($key=~/^form.\Q$prefix\Esubmit_/) { + $submitted=1;last; + } + } + } + if ($submitted) { + foreach my $key (keys(%env)) { + if ($key=~/^form.\Q$prefix\E/) { + my $name=$key; + $name=~s/^form.\Q$prefix\E//; + $posthash{$name}=$env{$key}; + } + } + if (exists($env{'form.all_submit'})) { + $posthash{'all_submit'}='yes'; + } + } my $output=Apache::lonnet::ssi($src,%posthash); + $output=~s|//(\s*)?\s||gs; + if (($target eq 'tex') || ($target eq 'tex_answer')) { + $output =~ s/^([^&]+)\\begin{document}//; + $output =~ s/\\end{document}//; +# $output = '\parbox{\minipagewidth}{ '.$output.' }'; + #some additional cleanup necessary for LateX (due to limitations of table environment + $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g; + } my $parser=HTML::TokeParser->new(\$output); my $token; + my $thisdir=$src; my $bodydef=0; - while (($bodydef==0) && - ($token=$parser->get_token)) { - if ($token->[1] eq 'body') { - $bodydef=1 - } - if ($token->[1] eq 'meta') { - } - if ($token->[1] eq 'script') { - } - if ($token->[1] eq 'basefont') { + 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; + $output=~s/\<\/form[^\>]*\>//gsi; + if ($output=~/\]+name\s*=\s*[\'\"]*HWFILE/) { + $nuploads++; + } + $output=~ + s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi; + if ($nuploads) { + $output=~ + s/\<(input[^\>]+name=\"\Q$prefix\EHWFILE[^\>]+)\s*id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\)]*)\>/\<$1 id="$prefix$2" $3\>/gsi; + ($turninpaths{$prefix},$multiresps{$prefix}) = + &Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'}); + if ($turninparent eq '') { + $turninparent = $turninpaths{$prefix}; + $turninparent =~ s{(/[^/]+)$}{}; + } + } + $output=~ + s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi; + } + $thisdir=~s/\/[^\/]*$//; + foreach (@rlinks) { + unless (($_=~/^https?\:\/\//i) || + ($_=~/^\//) || + ($_=~/^javascript:/i) || + ($_=~/^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; $ssibody{$_}=$output; - # ---------------------------------------------------------------- End SSI cell } - } @colcont; + } } } unless ($contents) { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; - $r->print('Empty page.'); + $r->print(&Apache::loncommon::start_page(undef,undef, + {'force_register' => 1,})); + $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. '); + $r->print('

'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course'). + &Apache::loncommon::end_page()); } else { # ------------------------------------------------------------------ Build page - $r->content_type('text/html'); - $r->send_http_header; - $r->print(''); - - $r->print(''); + +# ---------------------------------------------------------------- Send headers + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + if ($isxml) { + &Apache::loncommon::content_type($r,'text/xml'); + } else { + &Apache::loncommon::content_type($r,'text/html'); + } + $r->send_http_header; +# ------------------------------------------------------------------------ Head + if ($allscript) { + $allscript = + "\n".'\n"; + } + if (($nforms) && ($nuploads)) { + $allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps); + } +# ------------------------------------------------------------------ Start body + $r->print(&Apache::loncommon::start_page(undef,$allscript, + {'force_register' => 1, + 'bgcolor' => '#ffffff',})); +# ------------------------------------------------------------------ Start form + if ($nforms) { + my $fmtag = ' 1) { + $multi = 1; + } + $fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"'; + } + $fmtag .= ' action="'. + &Apache::lonenc::check_encrypt($requrl) + .'">'; + $r->print($fmtag); + } + } elsif (($target eq 'tex') || ($target eq 'tex_answer')) { + # I think this is not needed as the header + # will be put in for each of the page parts + # by the londefdef.pm now that we are opening up + # the parts of a page. + #$r->print('\documentclass{article} + # \newcommand{\keephidden}[1]{} + # \usepackage[dvips]{graphicx} + # \usepackage{epsfig} + # \usepackage{calc} + # \usepackage{longtable} + # \begin{document}'); + } +# ----------------------------------------------------------------- Start table + if (($target eq 'tex') || ($target eq 'tex_answer')) { +# # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead '); + if ($number_of_columns le $lcm) {$number_of_columns=$lcm;}; + } else { + $r->print('
'); + } +# generate rows for ($i=0;$i<=$#rows;$i++) { if ($rows[$i]) { - $r->print("\n"); + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + $r->print("\n"); + } my @colcont=split(/\&/,$rows[$i]); my $avespan=$lcm/($#colcont+1); for ($j=0;$j<=$#colcont;$j++) { my $rid=$colcont[$j]; - $r->print(''); + } else { +# for (my $incol=1;$incol<=$avespan;$incol++) { +# $r->print(' & '); +# } } - $r->print(''); } - $r->print(''); + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + $r->print(''); + } else { +# $r->print('REMOVETHEHEADOFLONGTABLE\\\\'); + } } } - $r->print("\n
'; + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + $r->print('print('>'.$ssibody{$rid}); - } elsif ($cellemb{$rid} eq 'img') { - $r->print('>'); + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + if ($ssibgcolor{$rid}) { + $r->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('>'); + } + $r->print($ssibody{$rid}); + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + $r->print(''); + } + if ($env{'course.'. + $env{'request.course.id'}. + '.pageseparators'} eq 'yes') { + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + $r->print('
'); + } + } + } elsif ($cellemb{$rid} eq 'img') { + $r->print('>'.$metainfo.''); + } elsif ($cellemb{$rid} eq 'emb') { + $r->print('>'.$metainfo.''); + } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) { + $r->print($metainfo.''.$hash{'title_'.$rid}.'
'. + &mt('It is recommended that you use an up-to-date virus scanner before handling this file.').'

'. + &Apache::londocs::entryline(0,&mt("Click to download or use your browser's Save Link function"),'/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).'


'); + } + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + $r->print('
"); - - $r->print(''); + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + $r->print("\n"); + } else { +# $r->print('\end{longtable}\strut'); + } +# ---------------------------------------------------------------- Submit, etc. + if ($nforms) { + $r->print( + ''); + } + unless (($target eq 'tex') || ($target eq 'tex_answer')) { + $r->print(&Apache::loncommon::end_page({'discussion' + => 1,})); + } else { + $r->print('\end{document}'.$number_of_columns); + } + &Apache::lonnet::symblist($requrl,%symbhash); + my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread()); + &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]); # -------------------------------------------------------------------- End page } # ------------------------------------------------------------- End render page } else { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; - $r->print('Page undefined.'); + &Apache::lonsequence::viewmap($r,$requrl); } # ------------------------------------------------------------------ Untie hash unless (untie(%hash)) { @@ -236,16 +575,171 @@ sub handler { } } } - $ENV{'user.error.msg'}="$requrl:bre:1:1:Course not initialized"; - return HTTP_NOT_ACCEPTABLE; + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + &Apache::lonsequence::viewmap($r,$requrl); + return OK; +} + +sub get_buttons { + my ($hash,$rid) = @_; + + my $metainfo = ''; + my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid}); + my ($mapid,$resid)=split(/\./,$rid); + my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid}, + $resid, + $hash->{'src_'.$rid}); + if ($hash->{'encrypted_'.$rid}) { + $symb=&Apache::lonenc::encrypted($symb); + $esrc=&Apache::lonenc::encrypted($esrc); + } + if ($hash->{'src_'.$rid} !~ m-^/uploaded/- + && !$env{'request.enc'} + && ($env{'request.role.adv'} + || !$hash->{'encrypted_'.$rid})) { + $metainfo .=''. + ''. + ''. + ''; + } + if ($hash->{'src_'.$rid} !~ m{^/uploaded/}) { + $metainfo .= ''. + ''. + ''; + } + if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) && + ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) { + + if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) { + $metainfo.= + ''. + '&command=submission">'. + ''. + ''. + ''. + '&command=gradingmenu">'. + ''. + ''; + } + if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) { + $metainfo.= + ''. + '" >'. + ''. + ''; + } + } + return $metainfo; } 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