# The LearningOnline Network with CAPA # Page Handler # # (TeX Content Handler # # 05/29/00,05/30 Gerd Kortemeyer) # 08/30,08/31,09/06,09/14 Gerd Kortemeyer package Apache::lonpage; use strict; use Apache::Constants qw(:common :http); use Apache::lonnet(); use GDBM_File; # -------------------------------------------------------------- Module Globals my %hash; my @rows; # ------------------------------------------------------------ Build page table sub tracetable { my ($sofar,$rid,$beenhere)=@_; my $further=$sofar; 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++; 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++; 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}); } } return $further; } # ================================================================ Main Handler sub handler { my $r=shift; # ------------------------------------------- Set document type for header only if ($r->header_only) { if ($ENV{'browser.mathml'}) { $r->content_type('text/xml'); } else { $r->content_type('text/html'); } $r->send_http_header; return OK; } my $requrl=$r->uri; # ----------------------------------------------------------------- Tie db file 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)) { # ------------------------------------------------------------------- Hash tied my $firstres=$hash{'map_start_'.$requrl}; my $lastres=$hash{'map_finish_'.$requrl}; if (($firstres) && ($lastres)) { # ----------------------------------------------------------------- Render page @rows=(); &tracetable(0,$firstres,'&'.$lastres.'&'); $rows[$#rows+1]=''.$lastres; my $i; my $maxcols=-1; my %ssibody=(); my %ssibgcolor=(); my %ssitext=(); my %ssilink=(); my %ssivlink=(); my %ssialink=(); my %cellemb=(); # --------------------------------------------- Get SSI output, post parameters for ($i=0;$i<=$#rows;$i++) { my @colcont=split(/\&/,$rows[$i]); $maxcols=$#colcont>$maxcols?$#colcont:$maxcols; map { my $src=$hash{'src_'.$_}; $src=~/\.\w+$/; $cellemb{$_}=Apache::lonnet::fileembstyle($1); if ($cellemb{$_} eq 'ssi') { # --------------------------------------------------------- This is an SSI cell # ---------------------------------------------------------------- End SSI cell } } @colcont; } if ($maxcols<0) { $r->content_type('text/html'); $r->send_http_header; $r->print('Empty page.'); } else { # ------------------------------------------------------------------ Build page # -------------------------------------------------------------------- End page } # ------------------------------------------------------------- End render page } else { $r->content_type('text/html'); $r->send_http_header; $r->print('Page undefined.'); } # ------------------------------------------------------------------ Untie hash unless (untie(%hash)) { &Apache::lonnet::logthis("WARNING: ". "Could not untie coursemap $fn (browse)."); } # -------------------------------------------------------------------- All done return OK; # ----------------------------------------------- Errors, hash could no be tied } } } $ENV{'user.error.msg'}="$requrl:bre:1:1:Course not initialized"; return HTTP_NOT_ACCEPTABLE; } 1; __END__