--- rat/lonpage.pm 2000/08/30 11:10:23 1.1 +++ rat/lonpage.pm 2000/10/16 17:29:11 1.13 @@ -4,49 +4,369 @@ # (TeX Content Handler # # 05/29/00,05/30 Gerd Kortemeyer) -# 08/30 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 Gerd Kortemeyer package Apache::lonpage; use strict; use Apache::Constants qw(:common :http); use Apache::lonnet(); +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 $b; +} + +# ------------------------------------------------------------ Build page table + +sub tracetable { + my ($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.'&'); + $sofar++; + if ($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=''; + map { + my $thiscond= + &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); + if ($thiscond>=$mincond) { + if ($next) { + $next.=','.$_.':'.$thiscond; + } else { + $next=$_.':'.$thiscond; + } + if ($thiscond>$mincond) { $mincond=$thiscond; } + } + } split(/\,/,$hash{'to_'.$rid}); + map { + my ($linkid,$condval)=split(/\:/,$_); + if ($condval>=$mincond) { + my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere); + if ($now>$further) { $further=$now; } + } + } split(/\,/,$next); + + } + } + return $further; +} + # ================================================================ Main Handler sub handler { my $r=shift; -# ----------------------------------------------------------- Set document type - - if ($ENV{'browser.mathml'}) { - $r->content_type('text/xml'); - } else { - $r->content_type('text/html'); - } - $r->send_http_header; +# ------------------------------------------- Set document type for header only - return OK if $r->header_only; + if ($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 "$fn.db") { - my %hash; - if (tie(%hash,'GDBM_File',"$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_'.$requrl}; if (($firstres) && ($lastres)) { # ----------------------------------------------------------------- Render page - $r->print("

All is cool.

"); + @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; + } + } + +# ------------------------------------------------------------ Add to symb list + + my $i; + my %symbhash=(); + for ($i=0;$i<=$#rows;$i++) { + if ($rows[$i]) { + my @colcont=split(/\&/,$rows[$i]); + map { + $symbhash{$hash{'src_'.$_}}=''; + } @colcont; + } + } + &Apache::lonnet::symblist($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 %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]); + $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1)); + map { + my $src=$hash{'src_'.$_}; + $src=~/\.(\w+)$/; + $cellemb{$_}=Apache::lonnet::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'})) { + map { + if ($_=~/^form.$prefix/) { + my $name=$_; + $name=~s/^form.$prefix//; + $posthash{$name}=$ENV{$_}; + } + } keys %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') { + $allmeta.="\n".$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; + } + $thisdir=~s/\/[^\/]*$//; + map { + unless (($_=~/^http:\/\//i) || + ($_=~/^\//)) { + my $newlocation= + &Apache::lonnet::hreflocation($thisdir,$_); + $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/; + } + } @rlinks; + $output=~s/\<\s*applet/\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); + if ($allscript) { + $r->print("\n\n"); + } + $r->print("\n\n"); +# ------------------------------------------------------------------ Start body + if ($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]; + $r->print(''); + } + $r->print(''); + } + } + $r->print("\n
print(' bgcolor="'. + $ssibgcolor{$rid}.'"'); + } + $r->print('>print(' text="'.$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') { + $r->print('>'); + } elsif ($cellemb{$rid} eq 'emb') { + $r->print('>'); + } + $r->print('
"); +# ---------------------------------------------------------------- Submit, etc. + if ($nforms) { + $r->print( + ''); + } + $r->print(''); +# -------------------------------------------------------------------- End page + } # ------------------------------------------------------------- End render page } else { - $r->print("

Page undefined.

"); + $r->content_type('text/html'); + $r->send_http_header; + $r->print('Page undefined.'); } # ------------------------------------------------------------------ Untie hash unless (untie(%hash)) { @@ -59,7 +379,7 @@ 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; } 500 Internal Server Error

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.