version 1.19, 2000/08/16 18:32:58
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version 1.52, 2001/02/13 00:17:11
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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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# 6/1/1 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 Safe::Hole; |
use Opcode; |
use Opcode; |
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use Apache::Constants qw(:common); |
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sub register { |
sub register { |
my $space; |
my $space; |
Line 19 sub register {
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Line 24 sub register {
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$Apache::lonxml::alltags{$temptag}=$space; |
$Apache::lonxml::alltags{$temptag}=$space; |
} |
} |
} |
} |
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sub printalltags { |
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my $temp; |
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foreach $temp (sort keys %Apache::lonxml::alltags) { |
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&Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}"); |
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} |
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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,$safeinit,%style_for_target) = @_; |
my ($target,$content_file_string,$safeinit,%style_for_target) = @_; |
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if ($target eq 'meta') { |
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$Apache::lonxml::textredirection = 0; |
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$Apache::lonxml::on_offimport = 1; |
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} elsif ($target eq 'grade') { |
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$Apache::lonxml::textredirection = 0; |
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$Apache::lonxml::on_offimport = 0; |
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} else { |
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$Apache::lonxml::textredirection = 1; |
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$Apache::lonxml::on_offimport = 0; |
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} |
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#&printalltags(); |
my @pars = (); |
my @pars = (); |
push (@pars,HTML::TokeParser->new(\$content_file_string)); |
@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 $result; |
my $result; |
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my $safeeval = new Safe; |
my $safeeval = new Safe; |
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my $safehole = new Safe::Hole; |
$safeeval->permit("entereval"); |
$safeeval->permit("entereval"); |
$safeeval->permit(":base_math"); |
$safeeval->permit(":base_math"); |
$safeeval->deny(":base_io"); |
$safeeval->deny(":base_io"); |
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$safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT'); |
#need to inspect this class of ops |
#need to inspect this class of ops |
# $safeeval->deny(":base_orig"); |
# $safeeval->deny(":base_orig"); |
if ( $safeinit ne '') {&Apache::run::run($safeinit,$safeeval);} |
$safeinit .= ';$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); |
Line 54 sub xmlparse {
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Line 90 sub xmlparse {
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while ( $#pars > -1 ) { |
while ( $#pars > -1 ) { |
while ($token = $pars[$#pars]->get_token) { |
while ($token = $pars[$#pars]->get_token) { |
if ($token->[0] eq 'T') { |
if ($token->[0] eq 'T') { |
$result=$token->[1]; |
if ($Apache::lonxml::textredirection == 1) {$result=$token->[1];} |
# $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,''); |
# $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,''); |
} elsif ($token->[0] eq 'S') { |
} elsif ($token->[0] eq 'S') { |
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# if ($target eq 'meta' and $token->[2]->{metaout} eq 'ON') {$Apache::lonxml::textredirection = 1;} |
# add tag to stack |
# add tag to stack |
push (@stack,$token->[1]); |
push (@stack,$token->[1]); |
# add parameters list to another stack |
# add parameters list to another stack |
push (@parstack,&parstring($token)); |
push (@parstack,&parstring($token)); |
&increasedepth($token); |
&increasedepth($token); |
if (exists $style_for_target{$token->[1]}) { |
if (exists $style_for_target{$token->[1]}) { |
$finaloutput .= &recurse($style_for_target{$token->[1]}, |
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$target,$safeeval,\%style_for_target, |
if ($Apache::lonxml::redirection == 1) { |
@parstack); |
$finaloutput .= &recurse($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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} else { |
} else { |
$result = &callsub("start_$token->[1]", $target, $token,\@parstack, |
$result = &callsub("start_$token->[1]", $target, $token,\@parstack, |
\@pars, $safeeval, \%style_for_target); |
\@pars, $safeeval, \%style_for_target); |
} |
} |
} elsif ($token->[0] eq 'E') { |
} elsif ($token->[0] eq 'E') { |
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#if ($target eq 'meta') {$Apache::lonxml::textredirection = 0;} |
#clear out any tags that didn't end |
#clear out any tags that didn't end |
while ($token->[1] ne $stack[$#stack] |
while ($token->[1] ne $stack[$#stack] |
&& ($#stack > -1)) {pop @stack;pop @parstack;&decreasedepth($token);} |
&& ($#stack > -1)) { |
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&Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']"); |
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pop @stack;pop @parstack;&decreasedepth($token); |
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} |
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if (exists $style_for_target{'/'."$token->[1]"}) { |
if (exists $style_for_target{'/'."$token->[1]"}) { |
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if ($Apache::lonxml::redirection == 1) { |
$finaloutput .= &recurse($style_for_target{'/'."$token->[1]"}, |
$finaloutput .= &recurse($style_for_target{'/'."$token->[1]"}, |
$target,$safeeval,\%style_for_target, |
$target,$safeeval,\%style_for_target, |
@parstack); |
@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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} else { |
} else { |
$result = &callsub("end_$token->[1]", $target, $token, \@parstack, |
$result = &callsub("end_$token->[1]", $target, $token, \@parstack, |
\@pars,$safeeval, \%style_for_target); |
\@pars,$safeeval, \%style_for_target); |
} |
} |
} |
} |
if ($result ne "" ) { |
if ($result ne "") { |
if ( $#parstack > -1 ) { |
if ( $#parstack > -1 ) { |
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if ($Apache::lonxml::redirection == 1) { |
$finaloutput .= &Apache::run::evaluate($result,$safeeval, |
$finaloutput .= &Apache::run::evaluate($result,$safeeval, |
$parstack[$#parstack]); |
$parstack[$#parstack]); |
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} else { |
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$Apache::lonxml::outputstack .= &Apache::run::evaluate($result,$safeeval, |
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$parstack[$#parstack]); |
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} |
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} else { |
} else { |
$finaloutput .= &Apache::run::evaluate($result,$safeeval,''); |
$finaloutput .= &Apache::run::evaluate($result,$safeeval,''); |
} |
} |
$result = ''; |
$result = ''; |
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} else { |
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$finaloutput .= $result; |
} |
} |
if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);} |
if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);} |
} |
} |
pop @pars; |
pop @pars; |
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pop @Apache::lonxml::pwd; |
} |
} |
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return $finaloutput; |
return $finaloutput; |
} |
} |
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Line 106 sub recurse {
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Line 174 sub recurse {
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my @innerparstack = (); |
my @innerparstack = (); |
my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_; |
my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_; |
my @pat = (); |
my @pat = (); |
push (@pat,HTML::TokeParser->new(\$newarg)); |
&newparser(\@pat,\$newarg); |
my $tokenpat; |
my $tokenpat; |
my $partstring = ''; |
my $partstring = ''; |
my $output=''; |
my $output=''; |
Line 114 sub recurse {
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Line 182 sub recurse {
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while ( $#pat > -1 ) { |
while ( $#pat > -1 ) { |
while ($tokenpat = $pat[$#pat]->get_token) { |
while ($tokenpat = $pat[$#pat]->get_token) { |
if ($tokenpat->[0] eq 'T') { |
if ($tokenpat->[0] eq 'T') { |
$partstring = $tokenpat->[1]; |
if ($Apache::lonxml::textredirection == 1) {$partstring = $tokenpat->[1];} |
} elsif ($tokenpat->[0] eq 'S') { |
} elsif ($tokenpat->[0] eq 'S') { |
push (@innerstack,$tokenpat->[1]); |
push (@innerstack,$tokenpat->[1]); |
push (@innerparstack,&parstring($tokenpat)); |
push (@innerparstack,&parstring($tokenpat)); |
Line 125 sub recurse {
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Line 193 sub recurse {
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} elsif ($tokenpat->[0] eq 'E') { |
} elsif ($tokenpat->[0] eq 'E') { |
#clear out any tags that didn't end |
#clear out any tags that didn't end |
while ($tokenpat->[1] ne $innerstack[$#innerstack] |
while ($tokenpat->[1] ne $innerstack[$#innerstack] |
&& ($#innerstack > -1)) {pop @innerstack;pop @innerparstack; |
&& ($#innerstack > -1)) { |
&decreasedepth($tokenpat);} |
&Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']"); |
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pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat); |
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} |
$partstring = &callsub("end_$tokenpat->[1]", |
$partstring = &callsub("end_$tokenpat->[1]", |
$target, $tokenpat, \@innerparstack, |
$target, $tokenpat, \@innerparstack, |
\@pat, $safeeval, $style_for_target); |
\@pat, $safeeval, $style_for_target); |
Line 154 sub recurse {
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Line 224 sub recurse {
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&decreasedepth($tokenpat);} |
&decreasedepth($tokenpat);} |
} |
} |
pop @pat; |
pop @pat; |
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pop @Apache::lonxml::pwd; |
} |
} |
return $output; |
return $output; |
} |
} |
Line 162 sub callsub {
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Line 233 sub callsub {
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my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_; |
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"; |
$Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter); |
$Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter); |
$currentstring = &$sub($target,$token,$parstack,$parser, |
$currentstring = &$sub1($target,$token,$parstack,$parser, |
$safeeval,$style); |
$safeeval,$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 = $token->[4]; |
} else { |
} else { |
Line 190 sub initdepth {
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Line 262 sub initdepth {
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sub increasedepth { |
sub increasedepth { |
my ($token) = @_; |
my ($token) = @_; |
if ($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++; |
$Apache::lonxml::depth++; |
# print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n"; |
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$Apache::lonxml::depthcounter[$Apache::lonxml::depth]++; |
$Apache::lonxml::depthcounter[$Apache::lonxml::depth]++; |
if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) { |
if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) { |
$Apache::lonxml::olddepth=$Apache::lonxml::depth; |
$Apache::lonxml::olddepth=$Apache::lonxml::depth; |
} |
} |
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my $curdepth=join('_',@Apache::lonxml::depthcounter); |
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&Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n"); |
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#print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n"; |
} |
} |
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sub decreasedepth { |
sub decreasedepth { |
my ($token) = @_; |
my ($token) = @_; |
$Apache::lonxml::depth--; |
$Apache::lonxml::depth--; |
# print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n"; |
if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) { |
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$#Apache::lonxml::depthcounter--; |
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$Apache::lonxml::olddepth=$Apache::lonxml::depth+1; |
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} |
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if ( $Apache::lonxml::depth < -1) { |
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&Apache::lonxml::warning("Unbalanced tags in resource"); |
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$Apache::lonxml::depth='-1'; |
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} |
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my $curdepth=join('_',@Apache::lonxml::depthcounter); |
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&Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"); |
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#print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"; |
} |
} |
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sub get_all_text { |
sub get_all_text { |
Line 214 sub get_all_text {
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Line 294 sub get_all_text {
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my $depth=0; |
my $depth=0; |
my $token; |
my $token; |
my $result=''; |
my $result=''; |
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my $tag=substr($tag,1); #strip the / off the tag |
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#&Apache::lonxml::debug("have:$tag:"); |
while (($depth >=0) && ($token = $pars->get_token)) { |
while (($depth >=0) && ($token = $pars->get_token)) { |
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#&Apache::lonxml::debug("token:$token->[0]:$depth:$token->[1]"); |
if ($token->[0] eq 'T') { |
if ($token->[0] eq 'T') { |
$result.=$token->[1]; |
$result.=$token->[1]; |
} elsif ($token->[0] eq 'S') { |
} elsif ($token->[0] eq 'S') { |
if ($token->[1] eq $tag) { $depth++; } |
if ($token->[1] eq $tag) { $depth++; } |
$result.=$token->[4]; |
$result.=$token->[4]; |
} elsif ($token->[0] eq 'E') { |
} elsif ($token->[0] eq 'E') { |
if ($token->[1] eq $tag) { $depth--; } |
if ( $token->[1] eq $tag) { $depth--; } |
#skip sending back the last end tag |
#skip sending back the last end tag |
if ($depth > -1) { $result.=$token->[2]; } |
if ($depth > -1) { $result.=$token->[2]; } else { |
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$pars->unget_token($token); |
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} |
} |
} |
} |
} |
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# &Apache::lonxml::debug("Exit:$result:"); |
return $result |
return $result |
} |
} |
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sub newparser { |
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my ($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 { |
sub parstring { |
my ($token) = @_; |
my ($token) = @_; |
my $temp=''; |
my $temp=''; |
map {$temp .= "my \$$_=\"$token->[2]->{$_}\";"} @{$token->[3]}; |
map { |
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unless ($_=~/\W/) { |
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my $val=$token->[2]->{$_}; |
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$val =~ s/([\%\@\\])/\$1/; |
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#if ($val =~ m/^[\%\@]/) { $val="\\".$val; } |
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$temp .= "my \$$_=\"$val\";" |
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} |
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} @{$token->[3]}; |
return $temp; |
return $temp; |
} |
} |
1; |
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__END__ |
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=0; |
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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 $file=&Apache::lonnet::filelocation("",$request->uri); |
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my %mystyle; |
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my $result = ''; |
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my $filecontents=&Apache::lonnet::getfile($file); |
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if ($filecontents == -1) { |
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&Apache::lonxml::error("<b> Unable to find <i>$file</i></b>"); |
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$filecontents=''; |
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} else { |
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$result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle); |
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} |
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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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if ($Apache::lonxml::debug eq 1) { |
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print "ERROR:".$_[0]."<br>\n"; |
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} else { |
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print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />"; |
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#notify author |
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&Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]); |
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#notify course |
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if ( $ENV{'request.course.id'} ) { |
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my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'}; |
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foreach my $user (split /\,/, $users) { |
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($user,my $domain) = split /:/, $user; |
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&Apache::lonmsg::user_crit_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]); |
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} |
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} |
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#FIXME probably shouldn't have me get everything forever. |
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&Apache::lonmsg::user_crit_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]); |
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#&Apache::lonmsg::user_crit_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]); |
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} |
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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; |
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__END__ |