--- loncom/xml/lonxml.pm 2000/07/14 19:11:03 1.10
+++ loncom/xml/lonxml.pm 2001/02/13 00:13:47 1.50
@@ -2,12 +2,18 @@
# XML Parser Module
#
# last modified 06/26/00 by Alexander Sakharuk
+# 11/6 Gerd Kortemeyer
+# 6/1/1 Gerd Kortemeyer
package Apache::lonxml;
-
+use vars
+qw(@pwd $outputstack $redirection $textredirection $on_offimport @extlinks);
use strict;
use HTML::TokeParser;
use Safe;
+use Safe::Hole;
+use Opcode;
+use Apache::Constants qw(:common);
sub register {
my $space;
@@ -19,144 +25,224 @@ sub register {
}
}
+sub printalltags {
+ my $temp;
+ foreach $temp (sort keys %Apache::lonxml::alltags) {
+ &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
+ }
+}
use Apache::style;
use Apache::lontexconvert;
use Apache::run;
use Apache::londefdef;
use Apache::scripttag;
#================================================== Main subroutine: xmlparse
+@pwd=();
+$outputstack = '';
+$redirection = 1;
+$textredirection = 1;
+$on_offimport = 0;
+@extlinks=();
sub xmlparse {
- my ($target,$content_file_string,%style_for_target) = @_;
- my $pars = HTML::TokeParser->new(\$content_file_string);
+ my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
+ if ($target eq 'meta') {
+ $Apache::lonxml::textredirection = 0;
+ $Apache::lonxml::on_offimport = 1;
+ } elsif ($target eq 'grade') {
+ $Apache::lonxml::textredirection = 0;
+ $Apache::lonxml::on_offimport = 0;
+ } else {
+ $Apache::lonxml::textredirection = 1;
+ $Apache::lonxml::on_offimport = 0;
+ }
+ #&printalltags();
+ my @pars = ();
+ @Apache::lonxml::pwd=();
+ my $pwd=$ENV{'request.filename'};
+ $pwd =~ s:/[^/]*$::;
+ &newparser(\@pars,\$content_file_string,$pwd);
my $currentstring = '';
my $finaloutput = '';
my $newarg = '';
+ my $result;
+
my $safeeval = new Safe;
+ my $safehole = new Safe::Hole;
$safeeval->permit("entereval");
+ $safeeval->permit(":base_math");
+ $safeeval->deny(":base_io");
+ $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
+#need to inspect this class of ops
+# $safeeval->deny(":base_orig");
+ $safeinit .= ';$external::target='.$target.';';
+ $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
+ &Apache::run::run($safeinit,$safeeval);
#-------------------- Redefinition of the target in the case of compound target
($target, my @tenta) = split('&&',$target);
-#------------------------- Stack definition (in stack we have all current tags)
-
my @stack = ();
my @parstack = ();
-
-#------------------------------------- Parse input string (content_file_string)
-
+ &initdepth;
my $token;
-
- while ($token = $pars->get_token) {
- if ($token->[0] eq 'T') {
- $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
- } elsif ($token->[0] eq 'S') {
- # add tag to stack
- push (@stack,$token->[1]);
- # add parameters list to another stack
- push (@parstack,&parstring($token));
-
- if (exists $style_for_target{$token->[1]}) {
- #basically recurse, but we never got more than one level down so just
- #create the new context here
- my @innerstack = ();
- my @innerparstack = ();
- # use style file definition
- $newarg = $style_for_target{$token->[1]};
- my $pat = HTML::TokeParser->new(\$newarg);
- my $tokenpat = '';
- my $partstring = '';
-
- while ($tokenpat = $pat->get_token) {
- if ($tokenpat->[0] eq 'T') {
- $partstring = $tokenpat->[1];
- } elsif ($tokenpat->[0] eq 'S') {
- push (@innerstack,$tokenpat->[1]);
- push (@innerparstack,&parstring($tokenpat));
- $partstring = &callsub("start_$tokenpat->[1]",
- $target, $tokenpat, \@innerparstack,
- $pat, $safeeval);
- } elsif ($tokenpat->[0] eq 'E') {
- #clear out any tags that didn't end
- while ($tokenpat->[1] ne $innerstack[$#innerstack]
- && ($#innerstack > 0)) {pop @innerstack;pop @innerparstack;}
- $partstring = &callsub("end_$tokenpat->[1]",
- $target, $tokenpat, \@innerparstack,
- $pat, $safeeval);
+ while ( $#pars > -1 ) {
+ while ($token = $pars[$#pars]->get_token) {
+ if ($token->[0] eq 'T') {
+ if ($Apache::lonxml::textredirection == 1) {$result=$token->[1];}
+ # $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
+ } elsif ($token->[0] eq 'S') {
+ # if ($target eq 'meta' and $token->[2]->{metaout} eq 'ON') {$Apache::lonxml::textredirection = 1;}
+ # add tag to stack
+ push (@stack,$token->[1]);
+ # add parameters list to another stack
+ push (@parstack,&parstring($token));
+ &increasedepth($token);
+ if (exists $style_for_target{$token->[1]}) {
+
+ if ($Apache::lonxml::redirection == 1) {
+ $finaloutput .= &recurse($style_for_target{$token->[1]},
+ $target,$safeeval,\%style_for_target,
+ @parstack);
+ } else {
+ $Apache::lonxml::outputstack .= &recurse($style_for_target{$token->[1]},
+ $target,$safeeval,\%style_for_target,
+ @parstack);
}
- #pass both the variable to the style tag, and the tag we
- #are processing inside the <definedtag>
- $finaloutput .= &Apache::run::evaluate($partstring,$safeeval,
- $parstack[$#parstack].$innerparstack[$#innerparstack]);
- if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack; }
+
+ } else {
+ $result = &callsub("start_$token->[1]", $target, $token,\@parstack,
+ \@pars, $safeeval, \%style_for_target);
+ }
+ } elsif ($token->[0] eq 'E') {
+ #if ($target eq 'meta') {$Apache::lonxml::textredirection = 0;}
+ #clear out any tags that didn't end
+ while ($token->[1] ne $stack[$#stack]
+ && ($#stack > -1)) {
+ &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']");
+ pop @stack;pop @parstack;&decreasedepth($token);
}
- } else {
- my $result = &callsub("start_$token->[1]", $target, $token,\@parstack,
- $pars, $safeeval);
- $finaloutput .= &Apache::run::evaluate($result,$safeeval,
- $parstack[$#parstack]);
- }
- } elsif ($token->[0] eq 'E') {
- #clear out any tags that didn't end
- while ($token->[1] ne $stack[$#stack]
- && ($#stack > 0)) {pop @stack;pop @parstack;}
-
- if (exists $style_for_target{'/'."$token->[1]"}) {
- my @innerstack = ();
- my @innerparstack = ();
- $newarg = $style_for_target{'/'."$token->[1]"};
- my $pat = HTML::TokeParser->new(\$newarg);
- my $tokenpat;
- my $partstring = '';
- while ($tokenpat = $pat->get_token) {
- if ($tokenpat->[0] eq 'T') {
- $partstring .= $tokenpat->[1];
- } elsif ($tokenpat->[0] eq 'S') {
- push (@innerstack,$tokenpat->[1]);
- push (@innerparstack,&parstring($tokenpat));
- $partstring = &callsub("start_$tokenpat->[1]",
- $target, $tokenpat, \@innerparstack,
- $pat, $safeeval);
- } elsif ($tokenpat->[0] eq 'E') {
- #clear out any tags that didn't end
- while ($tokenpat->[1] ne $innerstack[$#innerstack]
- && ($#innerstack > 0)) {pop @innerstack;pop @innerparstack;}
- $partstring = &callsub("end_$tokenpat->[1]",
- $target, $tokenpat, \@innerparstack,
- $pat, $safeeval);
- }
- #pass both the variable to the style tag, and the tag we
- #are processing inside the <definedtag>
- $finaloutput .= &Apache::run::evaluate($partstring,$safeeval,
- $parstack[$#parstack].$innerparstack[$#innerparstack]);
- if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack; }
+ if (exists $style_for_target{'/'."$token->[1]"}) {
+
+ if ($Apache::lonxml::redirection == 1) {
+ $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"},
+ $target,$safeeval,\%style_for_target,
+ @parstack);
+ } else {
+ $Apache::lonxml::outputstack .= &recurse($style_for_target{'/'."$token->[1]"},
+ $target,$safeeval,\%style_for_target,
+ @parstack);
+ }
+
+ } else {
+ $result = &callsub("end_$token->[1]", $target, $token, \@parstack,
+ \@pars,$safeeval, \%style_for_target);
+ }
+ }
+ if ($result ne "") {
+ if ( $#parstack > -1 ) {
+
+ if ($Apache::lonxml::redirection == 1) {
+ $finaloutput .= &Apache::run::evaluate($result,$safeeval,
+ $parstack[$#parstack]);
+ } else {
+ $Apache::lonxml::outputstack .= &Apache::run::evaluate($result,$safeeval,
+ $parstack[$#parstack]);
+ }
+
+ } else {
+ $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
}
+ $result = '';
} else {
- my $result = &callsub("end_$token->[1]", $target, $token, \@parstack,
- $pars,$safeeval);
- $finaloutput .= &Apache::run::evaluate($result,$safeeval,
- $parstack[$#parstack]);
+ $finaloutput .= $result;
}
- pop @stack;
- pop @parstack;
+ if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);}
}
+ pop @pars;
+ pop @Apache::lonxml::pwd;
}
+
return $finaloutput;
}
+sub recurse {
+
+ my @innerstack = ();
+ my @innerparstack = ();
+ my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
+ my @pat = ();
+ &newparser(\@pat,\$newarg);
+ my $tokenpat;
+ my $partstring = '';
+ my $output='';
+ my $decls='';
+ while ( $#pat > -1 ) {
+ while ($tokenpat = $pat[$#pat]->get_token) {
+ if ($tokenpat->[0] eq 'T') {
+ if ($Apache::lonxml::textredirection == 1) {$partstring = $tokenpat->[1];}
+ } elsif ($tokenpat->[0] eq 'S') {
+ push (@innerstack,$tokenpat->[1]);
+ push (@innerparstack,&parstring($tokenpat));
+ &increasedepth($tokenpat);
+ $partstring = &callsub("start_$tokenpat->[1]",
+ $target, $tokenpat, \@innerparstack,
+ \@pat, $safeeval, $style_for_target);
+ } elsif ($tokenpat->[0] eq 'E') {
+ #clear out any tags that didn't end
+ while ($tokenpat->[1] ne $innerstack[$#innerstack]
+ && ($#innerstack > -1)) {
+ &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
+ pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat);
+ }
+ $partstring = &callsub("end_$tokenpat->[1]",
+ $target, $tokenpat, \@innerparstack,
+ \@pat, $safeeval, $style_for_target);
+ }
+ #pass both the variable to the style tag, and the tag we
+ #are processing inside the <definedtag>
+ if ( $partstring ne "" ) {
+ if ( $#parstack > -1 ) {
+ if ( $#innerparstack > -1 ) {
+ $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
+ } else {
+ $decls= $parstack[$#parstack];
+ }
+ } else {
+ if ( $#innerparstack > -1 ) {
+ $decls=$innerparstack[$#innerparstack];
+ } else {
+ $decls='';
+ }
+ }
+ $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
+ $partstring = '';
+ }
+ if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
+ &decreasedepth($tokenpat);}
+ }
+ pop @pat;
+ pop @Apache::lonxml::pwd;
+ }
+ return $output;
+}
+
sub callsub {
- my ($sub,$target,$token,$parstack,$parser,$safeeval)=@_;
+ my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_;
my $currentstring='';
{
+ my $sub1;
no strict 'refs';
if (my $space=$Apache::lonxml::alltags{$token->[1]}) {
- #print "Calling sub $sub in $space \n";
- $sub="$space\:\:$sub";
- $currentstring = &$sub($target,$token,\@$parstack,$parser,$safeeval);
+ #&Apache::lonxml::debug("Calling sub $sub in $space<br>\n");
+ $sub1="$space\:\:$sub";
+ $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
+ $currentstring = &$sub1($target,$token,$parstack,$parser,
+ $safeeval,$style);
} else {
- #print "NOT Calling sub $sub\n";
+ #&Apache::lonxml::debug("NOT Calling sub $sub in $space<br>\n");
if (defined($token->[4])) {
$currentstring = $token->[4];
} else {
@@ -168,11 +254,165 @@ sub callsub {
return $currentstring;
}
+sub initdepth {
+ @Apache::lonxml::depthcounter=();
+ $Apache::lonxml::depth=-1;
+ $Apache::lonxml::olddepth=-1;
+}
+
+sub increasedepth {
+ my ($token) = @_;
+ $Apache::lonxml::depth++;
+ $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
+ if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
+ $Apache::lonxml::olddepth=$Apache::lonxml::depth;
+ }
+ my $curdepth=join('_',@Apache::lonxml::depthcounter);
+ &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
+#print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
+}
+
+sub decreasedepth {
+ my ($token) = @_;
+ $Apache::lonxml::depth--;
+ if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
+ $#Apache::lonxml::depthcounter--;
+ $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
+ }
+ if ( $Apache::lonxml::depth < -1) {
+ &Apache::lonxml::warning("Unbalanced tags in resource");
+ $Apache::lonxml::depth='-1';
+ }
+ my $curdepth=join('_',@Apache::lonxml::depthcounter);
+ &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
+#print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
+}
+
+sub get_all_text {
+
+ my($tag,$pars)= @_;
+ my $depth=0;
+ my $token;
+ my $result='';
+ my $tag=substr($tag,1); #strip the / off the tag
+ #&Apache::lonxml::debug("have:$tag:");
+ while (($depth >=0) && ($token = $pars->get_token)) {
+ #&Apache::lonxml::debug("token:$token->[0]:$depth:$token->[1]");
+ if ($token->[0] eq 'T') {
+ $result.=$token->[1];
+ } elsif ($token->[0] eq 'S') {
+ if ($token->[1] eq $tag) { $depth++; }
+ $result.=$token->[4];
+ } elsif ($token->[0] eq 'E') {
+ if ( $token->[1] eq $tag) { $depth--; }
+ #skip sending back the last end tag
+ if ($depth > -1) { $result.=$token->[2]; } else {
+ $pars->unget_token($token);
+ }
+ }
+ }
+# &Apache::lonxml::debug("Exit:$result:");
+ return $result
+}
+
+sub newparser {
+ my ($parser,$contentref,$dir) = @_;
+ push (@$parser,HTML::TokeParser->new($contentref));
+ if ( $dir eq '' ) {
+ push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
+ } else {
+ push (@Apache::lonxml::pwd, $dir);
+ }
+# &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
+# &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
+}
+
sub parstring {
my ($token) = @_;
my $temp='';
- map {$temp .= "my \$$_=\"$token->[2]->{$_}\";"} @{$token->[3]};
+ map {
+ unless ($_=~/\W/) {
+ my $val=$token->[2]->{$_};
+ if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
+ $temp .= "my \$$_=\"$val\";"
+ }
+ } @{$token->[3]};
return $temp;
}
+
+sub writeallows {
+ my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
+ my $thisdir=$thisurl;
+ $thisdir=~s/\/[^\/]+$//;
+ my %httpref=();
+ map {
+ $httpref{'httpref.'.
+ &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
+ &Apache::lonnet::appenv(%httpref);
+}
+
+sub handler {
+ my $request=shift;
+
+ my $target='web';
+ $Apache::lonxml::debug=0;
+ if ($ENV{'browser.mathml'}) {
+ $request->content_type('text/xml');
+ } else {
+ $request->content_type('text/html');
+ }
+
+# $request->print(<<ENDHEADER);
+#<html>
+#<head>
+#<title>Just test</title>
+#</head>
+#<body bgcolor="#FFFFFF">
+#ENDHEADER
+# &Apache::lonhomework::send_header($request);
+ $request->send_http_header;
+
+ return OK if $request->header_only;
+
+ $request->print(&Apache::lontexconvert::header());
+
+ $request->print('<body bgcolor="#FFFFFF">'."\n");
+
+ my $file=&Apache::lonnet::filelocation("",$request->uri);
+ my %mystyle;
+ my $result = '';
+ my $filecontents=&Apache::lonnet::getfile($file);
+ if ($filecontents == -1) {
+ &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
+ $filecontents='';
+ } else {
+ $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
+ }
+ $request->print($result);
+
+
+ $request->print('</body>');
+ $request->print(&Apache::lontexconvert::footer());
+ writeallows($request->uri);
+ return OK;
+}
+
+$Apache::lonxml::debug=0;
+sub debug {
+ if ($Apache::lonxml::debug eq 1) {
+ print "DEBUG:".$_[0]."<br>\n";
+ }
+}
+
+sub error {
+ print "ERROR:".$_[0]."<br>\n";
+}
+
+sub warning {
+ if ($Apache::lonxml::debug eq 1) {
+ print "WARNING:".$_[0]."<br>\n";
+ }
+}
+
1;
__END__