version 1.7, 2000/06/29 18:52:54
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version 1.34, 2000/11/06 17:03:29
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Line 2
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Line 2
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# XML Parser Module |
# XML Parser Module |
# |
# |
# last modified 06/26/00 by Alexander Sakharuk |
# last modified 06/26/00 by Alexander Sakharuk |
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# 11/6 Gerd Kortemeyer |
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package Apache::lonxml; |
package Apache::lonxml; |
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use vars |
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qw(@pwd $outputstack $redirection $textredirection $on_offimport @extlinks); |
use strict; |
use strict; |
use HTML::TokeParser; |
use HTML::TokeParser; |
use Safe; |
use Safe; |
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use Opcode; |
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sub register { |
sub register { |
my $space; |
my $space; |
Line 18 sub register {
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Line 21 sub register {
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$Apache::lonxml::alltags{$temptag}=$space; |
$Apache::lonxml::alltags{$temptag}=$space; |
} |
} |
} |
} |
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use Apache::style; |
use Apache::style; |
use Apache::lontexconvert; |
use Apache::lontexconvert; |
use Apache::run; |
use Apache::run; |
use Apache::londefdef; |
use Apache::londefdef; |
use Apache::scripttag; |
use Apache::scripttag; |
#================================================== Main subroutine: xmlparse |
#================================================== Main subroutine: xmlparse |
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@pwd=(); |
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$outputstack = ''; |
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$redirection = 1; |
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$textredirection = 1; |
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$on_offimport = 0; |
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@extlinks=(); |
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sub xmlparse { |
sub xmlparse { |
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my ($target,$content_file_string,%style_for_target) = @_; |
my ($target,$content_file_string,$safeinit,%style_for_target) = @_; |
my $pars = HTML::TokeParser->new(\$content_file_string); |
if ($target eq 'meta') |
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{$Apache::lonxml::textredirection = 0; |
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$Apache::lonxml::on_offimport = 1; |
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} |
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my @pars = (); |
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@Apache::lonxml::pwd=(); |
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my $pwd=$ENV{'request.filename'}; |
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$pwd =~ s:/[^/]*$::; |
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&newparser(\@pars,\$content_file_string,$pwd); |
my $currentstring = ''; |
my $currentstring = ''; |
my $finaloutput = ''; |
my $finaloutput = ''; |
my $newarg = ''; |
my $newarg = ''; |
my $tempostring = ''; |
my $result; |
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my $safeeval = new Safe; |
my $safeeval = new Safe; |
$safeeval->permit("entereval"); |
$safeeval->permit("entereval"); |
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$safeeval->permit(":base_math"); |
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$safeeval->deny(":base_io"); |
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#need to inspect this class of ops |
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# $safeeval->deny(":base_orig"); |
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$safeinit .= ';$external::target='.$target.';'; |
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$safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';'; |
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&Apache::run::run($safeinit,$safeeval); |
#-------------------- Redefinition of the target in the case of compound target |
#-------------------- Redefinition of the target in the case of compound target |
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($target, my @tenta) = split('&&',$target); |
($target, my @tenta) = split('&&',$target); |
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#------------------------- Stack definition (in stack we have all current tags) |
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my @stack = (); |
my @stack = (); |
my @parstack = (); |
my @parstack = (); |
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&initdepth; |
#------------------------------------- Parse input string (content_file_string) |
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my $token; |
my $token; |
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while ( $#pars > -1 ) { |
while ($token = $pars->get_token) { |
while ($token = $pars[$#pars]->get_token) { |
if ($token->[0] eq 'T') { |
if ($token->[0] eq 'T') { |
$finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,''); |
if ($Apache::lonxml::textredirection == 1) {$result=$token->[1];} |
} elsif ($token->[0] eq 'S') { |
# $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,''); |
# add tag to stack |
} elsif ($token->[0] eq 'S') { |
push (@stack,$token->[1]); |
# if ($target eq 'meta' and $token->[2]->{metaout} eq 'ON') {$Apache::lonxml::textredirection = 1;} |
# add parameters list to another stack |
# add tag to stack |
map {$tempostring .= "my \$$_=\"$token->[2]->{$_}\";"} @{$token->[3]}; |
push (@stack,$token->[1]); |
push (@parstack,$tempostring); |
# add parameters list to another stack |
$tempostring = ''; |
push (@parstack,&parstring($token)); |
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&increasedepth($token); |
if (exists $style_for_target{$token->[1]}) { |
if (exists $style_for_target{$token->[1]}) { |
#print "Style for $token->[1] is " .$style_for_target{$token->[1]}."\n"; |
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# use style file definition |
if ($Apache::lonxml::redirection == 1) { |
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$finaloutput .= &recurse($style_for_target{$token->[1]}, |
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$target,$safeeval,\%style_for_target, |
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@parstack); |
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} else { |
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$Apache::lonxml::outputstack .= &recurse($style_for_target{$token->[1]}, |
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$target,$safeeval,\%style_for_target, |
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@parstack); |
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} |
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$newarg = $style_for_target{$token->[1]}; |
} else { |
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$result = &callsub("start_$token->[1]", $target, $token,\@parstack, |
my $pat = HTML::TokeParser->new(\$newarg); |
\@pars, $safeeval, \%style_for_target); |
my $tokenpat = ''; |
} |
my $partstring = ''; |
} elsif ($token->[0] eq 'E') { |
my $oustring = ''; |
# if ($target eq 'meta') {$Apache::lonxml::textredirection = 0;} |
my $outputstring; |
#clear out any tags that didn't end |
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while ($token->[1] ne $stack[$#stack] |
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&& ($#stack > -1)) {pop @stack;pop @parstack;&decreasedepth($token);} |
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while ($tokenpat = $pat->get_token) { |
if (exists $style_for_target{'/'."$token->[1]"}) { |
if ($tokenpat->[0] eq 'T') { |
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$partstring = $tokenpat->[1]; |
if ($Apache::lonxml::redirection == 1) { |
} elsif ($tokenpat->[0] eq 'S') { |
$finaloutput .= &recurse($style_for_target{'/'."$token->[1]"}, |
my $sub="start_$tokenpat->[1]"; |
$target,$safeeval,\%style_for_target, |
$partstring = &callsub($sub, $target, $tokenpat, \@parstack) |
@parstack); |
} elsif ($tokenpat->[0] eq 'E') { |
} else { |
my $sub="end_$tokenpat->[1]"; |
$Apache::lonxml::outputstack .= &recurse($style_for_target{'/'."$token->[1]"}, |
$partstring = &callsub($sub, $target, $tokenpat, \@parstack) |
$target,$safeeval,\%style_for_target, |
} |
@parstack); |
# generate the my mechanism |
} |
# map {$partstring =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]}; |
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print "Temp: $parstack[$#parstack]\n"; |
} else { |
$oustring .= &Apache::run::evaluate($partstring,$safeeval,$parstack[$#parstack]); |
$result = &callsub("end_$token->[1]", $target, $token, \@parstack, |
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\@pars,$safeeval, \%style_for_target); |
} |
} |
$finaloutput .= $oustring; |
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} else { |
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my $sub="start_$token->[1]"; |
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#print "use default definition of tag $sub\n"; |
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my $result = &callsub($sub, $target, $token, \@parstack); |
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$finaloutput .= &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]); |
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} |
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} elsif ($token->[0] eq 'E') { |
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# Put here check for correct final tag (to avoid existence of |
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# starting tag only) |
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pop @stack; |
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unless (exists $style_for_target{$token->[1]}) { |
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my $sub="end_$token->[1]"; |
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$finaloutput .= callsub($sub, $target, $token, \@parstack); |
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} |
} |
#---- end tag from the style file |
if ($result ne "") { |
if (exists $style_for_target{'/'."$token->[1]"}) { |
if ( $#parstack > -1 ) { |
$newarg = $style_for_target{'/'."$token->[1]"}; |
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if (index($newarg,'script') != -1 ) { |
if ($Apache::lonxml::redirection == 1) { |
my $pat = HTML::TokeParser->new(\$newarg); |
$finaloutput .= &Apache::run::evaluate($result,$safeeval, |
my $tokenpat; |
$parstack[$#parstack]); |
my $partstring = ''; |
} else { |
my $oustring = ''; |
$Apache::lonxml::outputstack .= &Apache::run::evaluate($result,$safeeval, |
my $outputstring; |
$parstack[$#parstack]); |
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} |
while ($tokenpat = $pat->get_token) { |
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if ($tokenpat->[0] eq 'T') { |
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$oustring .= $tokenpat->[1]; |
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} elsif ($tokenpat->[0] eq 'S') { |
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if ($tokenpat->[1] eq 'script') { |
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while ($tokenpat = $pat->get_token and $tokenpat->[1] ne 'script') { |
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if ($tokenpat->[0] eq 'S') { |
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$partstring .= $tokenpat->[4]; |
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} elsif ($tokenpat->[0] eq 'T') { |
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$partstring .= $tokenpat->[1]; |
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} elsif ($tokenpat->[0] eq 'E') { |
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$partstring .= $tokenpat->[2]; |
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} |
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} |
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my @tempor_list = split(',',$parstack[$#parstack]); |
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my @te_kl = (); |
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my %tempor_hash = (); |
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map {(my $onete,my $twote) = split('=',$_); push (@te_kl,$onete); |
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$tempor_hash{$onete} = $twote} @tempor_list; |
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map {$partstring =~ s/\$$_/$tempor_hash{$_}/g; } @te_kl; |
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print "want to use run\n"; |
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&Apache::run::run($partstring,$safeeval); |
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$partstring = ''; |
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} elsif ($tokenpat->[1] eq 'evaluate') { |
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$outputstring = &Apache::run::evaluate($tokenpat->[2]{expression},$safeeval); |
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$oustring .= $outputstring; |
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} else { |
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$oustring .= $tokenpat->[4]; |
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} |
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} elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') { |
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$oustring .= $tokenpat->[1]; |
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} |
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} |
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$newarg = $oustring; |
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} else { |
} else { |
my @very_temp = split(',',$parstack[$#parstack]); |
$finaloutput .= &Apache::run::evaluate($result,$safeeval,''); |
map {my @ret= split('=',$_); $newarg =~ s/\$$ret[0]/$ret[1]/g; } @very_temp; |
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} |
} |
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$result = ''; |
$finaloutput .= $newarg; |
} else { |
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$finaloutput .= $result; |
} |
} |
pop @parstack; |
if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);} |
} |
} |
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pop @pars; |
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pop @Apache::lonxml::pwd; |
} |
} |
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return $finaloutput; |
return $finaloutput; |
} |
} |
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sub recurse { |
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my @innerstack = (); |
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my @innerparstack = (); |
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my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_; |
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my @pat = (); |
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&newparser(\@pat,\$newarg); |
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my $tokenpat; |
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my $partstring = ''; |
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my $output=''; |
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my $decls=''; |
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while ( $#pat > -1 ) { |
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while ($tokenpat = $pat[$#pat]->get_token) { |
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if ($tokenpat->[0] eq 'T') { |
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if ($Apache::lonxml::textredirection == 1) {$partstring = $tokenpat->[1];} |
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} elsif ($tokenpat->[0] eq 'S') { |
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push (@innerstack,$tokenpat->[1]); |
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push (@innerparstack,&parstring($tokenpat)); |
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&increasedepth($tokenpat); |
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$partstring = &callsub("start_$tokenpat->[1]", |
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$target, $tokenpat, \@innerparstack, |
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\@pat, $safeeval, $style_for_target); |
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} elsif ($tokenpat->[0] eq 'E') { |
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#clear out any tags that didn't end |
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while ($tokenpat->[1] ne $innerstack[$#innerstack] |
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&& ($#innerstack > -1)) {pop @innerstack;pop @innerparstack; |
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&decreasedepth($tokenpat);} |
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$partstring = &callsub("end_$tokenpat->[1]", |
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$target, $tokenpat, \@innerparstack, |
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\@pat, $safeeval, $style_for_target); |
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} |
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#pass both the variable to the style tag, and the tag we |
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#are processing inside the <definedtag> |
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if ( $partstring ne "" ) { |
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if ( $#parstack > -1 ) { |
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if ( $#innerparstack > -1 ) { |
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$decls= $parstack[$#parstack].$innerparstack[$#innerparstack]; |
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} else { |
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$decls= $parstack[$#parstack]; |
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} |
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} else { |
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if ( $#innerparstack > -1 ) { |
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$decls=$innerparstack[$#innerparstack]; |
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} else { |
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$decls=''; |
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} |
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} |
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$output .= &Apache::run::evaluate($partstring,$safeeval,$decls); |
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$partstring = ''; |
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} |
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if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack; |
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&decreasedepth($tokenpat);} |
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} |
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pop @pat; |
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pop @Apache::lonxml::pwd; |
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} |
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return $output; |
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} |
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sub callsub { |
sub callsub { |
my ($sub,$target,$token,@parstack)=@_; |
my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my $currentstring=''; |
my $currentstring=''; |
{ |
{ |
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my $sub1; |
no strict 'refs'; |
no strict 'refs'; |
if (my $space=$Apache::lonxml::alltags{$token->[1]}) { |
if (my $space=$Apache::lonxml::alltags{$token->[1]}) { |
#print "Calling sub $sub in $space \n"; |
#&Apache::lonxml::debug("Calling sub $sub in $space<br>\n"); |
$sub="$space\:\:$sub"; |
$sub1="$space\:\:$sub"; |
$currentstring = &$sub($target,$token,\@parstack); |
$Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter); |
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$currentstring = &$sub1($target,$token,$parstack,$parser, |
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$safeeval,$style); |
} else { |
} else { |
#print "NOT Calling sub $sub\n"; |
#&Apache::lonxml::debug("NOT Calling sub $sub in $space<br>\n"); |
if (defined($token->[4])) { |
if (defined($token->[4])) { |
$currentstring = $token->[4]; |
$currentstring = $token->[4]; |
} else { |
} else { |
Line 185 sub callsub {
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Line 231 sub callsub {
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return $currentstring; |
return $currentstring; |
} |
} |
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sub initdepth { |
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@Apache::lonxml::depthcounter=(); |
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$Apache::lonxml::depth=-1; |
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$Apache::lonxml::olddepth=-1; |
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} |
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sub increasedepth { |
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my ($token) = @_; |
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if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) { |
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$#Apache::lonxml::depthcounter--; |
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$Apache::lonxml::olddepth=$Apache::lonxml::depth; |
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} |
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$Apache::lonxml::depth++; |
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# print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n"; |
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$Apache::lonxml::depthcounter[$Apache::lonxml::depth]++; |
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if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) { |
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$Apache::lonxml::olddepth=$Apache::lonxml::depth; |
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} |
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} |
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sub decreasedepth { |
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my ($token) = @_; |
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$Apache::lonxml::depth--; |
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# print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n"; |
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} |
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sub get_all_text { |
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my($tag,$pars)= @_; |
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my $depth=0; |
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my $token; |
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my $result=''; |
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my $tag=substr($tag,1); #strip the / off the tag |
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# &Apache::lonxml::debug("have:$tag:"); |
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while (($depth >=0) && ($token = $pars->get_token)) { |
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if ($token->[0] eq 'T') { |
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$result.=$token->[1]; |
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} elsif ($token->[0] eq 'S') { |
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if ($token->[1] eq $tag) { $depth++; } |
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$result.=$token->[4]; |
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} elsif ($token->[0] eq 'E') { |
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if ( $token->[1] eq $tag) { $depth--; } |
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#skip sending back the last end tag |
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if ($depth > -1) { $result.=$token->[2]; } |
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} |
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} |
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return $result |
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} |
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sub newparser { |
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my ($parser,$contentref,$dir) = @_; |
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push (@$parser,HTML::TokeParser->new($contentref)); |
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if ( $dir eq '' ) { |
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push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]); |
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} else { |
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push (@Apache::lonxml::pwd, $dir); |
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} |
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# &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd"); |
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# &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]"); |
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} |
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sub parstring { |
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my ($token) = @_; |
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my $temp=''; |
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map { |
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if ($_=~/\w+/) { |
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$temp .= "my \$$_=\"$token->[2]->{$_}\";" |
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} |
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} @{$token->[3]}; |
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return $temp; |
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} |
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sub writeallows { |
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my $thisurl='/res/'.&Apache::lonnet::declutter(shift); |
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my $thisdir=$thisurl; |
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$thisdir=~s/\/[^\/]+$//; |
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my %httpref=(); |
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map { |
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$httpref{'httpref.'. |
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&Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks; |
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&Apache::lonnet::appenv(%httpref); |
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} |
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sub handler { |
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my $request=shift; |
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my $target='web'; |
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$Apache::lonxml::debug=1; |
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if ($ENV{'browser.mathml'}) { |
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$request->content_type('text/xml'); |
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} else { |
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$request->content_type('text/html'); |
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} |
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# $request->print(<<ENDHEADER); |
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#<html> |
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#<head> |
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#<title>Just test</title> |
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#</head> |
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#<body bgcolor="#FFFFFF"> |
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#ENDHEADER |
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# &Apache::lonhomework::send_header($request); |
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$request->send_http_header; |
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return 'OK' if $request->header_only; |
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$request->print(&Apache::lontexconvert::header()); |
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$request->print('<body bgcolor="#FFFFFF">'."\n"); |
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my $file = "/home/httpd/html".$request->uri; |
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my %mystyle; |
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my $result = ''; |
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$result = Apache::lonxml::xmlparse($target, &Apache::lonnet::getfile($file),'',%mystyle); |
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$request->print($result); |
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$request->print('</body>'); |
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$request->print(&Apache::lontexconvert::footer()); |
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writeallows($request->uri); |
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return 'OK'; |
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} |
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$Apache::lonxml::debug=0; |
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sub debug { |
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if ($Apache::lonxml::debug eq 1) { |
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print "DEBUG:".$_[0]."<br>\n"; |
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} |
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} |
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sub error { |
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print "ERROR:".$_[0]."<br>\n"; |
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} |
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sub warning { |
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if ($Apache::lonxml::debug eq 1) { |
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print "WARNING:".$_[0]."<br>\n"; |
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} |
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} |
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1; |
1; |
__END__ |
__END__ |
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