--- loncom/xml/lonxml.pm 2000/08/16 18:32:58 1.19
+++ loncom/xml/lonxml.pm 2001/01/06 16:52:34 1.47
@@ -2,13 +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 $space;
@@ -26,23 +31,47 @@ use Apache::run;
use Apache::londefdef;
use Apache::scripttag;
#================================================== Main subroutine: xmlparse
+@pwd=();
+$outputstack = '';
+$redirection = 1;
+$textredirection = 1;
+$on_offimport = 0;
+@extlinks=();
sub xmlparse {
my ($target,$content_file_string,$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;
+ }
my @pars = ();
- push (@pars,HTML::TokeParser->new(\$content_file_string));
+ @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");
- if ( $safeinit ne '') {&Apache::run::run($safeinit,$safeeval);}
+ $safeinit .= ';$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);
@@ -54,49 +83,81 @@ sub xmlparse {
while ( $#pars > -1 ) {
while ($token = $pars[$#pars]->get_token) {
if ($token->[0] eq 'T') {
- $result=$token->[1];
-# $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
+ if ($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]}) {
- $finaloutput .= &recurse($style_for_target{$token->[1]},
- $target,$safeeval,\%style_for_target,
- @parstack);
+
+ 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 {
$result = &callsub("start_$token->[1]", $target, $token,\@parstack,
- \@pars, $safeeval, \%style_for_target);
+ \@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]
- && ($#stack > -1)) {pop @stack;pop @parstack;&decreasedepth($token);}
+ && ($#stack > -1)) {
+ &Apache::lonxml::error("Unbalanced tags in resource $stack['-1']");
+ pop @stack;pop @parstack;&decreasedepth($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);
+ }
+
} else {
$result = &callsub("end_$token->[1]", $target, $token, \@parstack,
\@pars,$safeeval, \%style_for_target);
}
}
- if ($result ne "" ) {
- if ( $#parstack > -1 ) {
+ if ($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 {
+ $finaloutput .= $result;
}
if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);}
}
pop @pars;
+ pop @Apache::lonxml::pwd;
}
+
return $finaloutput;
}
@@ -106,7 +167,7 @@ sub recurse {
my @innerparstack = ();
my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
my @pat = ();
- push (@pat,HTML::TokeParser->new(\$newarg));
+ &newparser(\@pat,\$newarg);
my $tokenpat;
my $partstring = '';
my $output='';
@@ -114,7 +175,7 @@ sub recurse {
while ( $#pat > -1 ) {
while ($tokenpat = $pat[$#pat]->get_token) {
if ($tokenpat->[0] eq 'T') {
- $partstring = $tokenpat->[1];
+ if ($Apache::lonxml::textredirection == 1) {$partstring = $tokenpat->[1];}
} elsif ($tokenpat->[0] eq 'S') {
push (@innerstack,$tokenpat->[1]);
push (@innerparstack,&parstring($tokenpat));
@@ -125,8 +186,10 @@ sub recurse {
} elsif ($tokenpat->[0] eq 'E') {
#clear out any tags that didn't end
while ($tokenpat->[1] ne $innerstack[$#innerstack]
- && ($#innerstack > -1)) {pop @innerstack;pop @innerparstack;
- &decreasedepth($tokenpat);}
+ && ($#innerstack > -1)) {
+ &Apache::lonxml::error("Unbalanced tags in resource $innerstack['-1']");
+ pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat);
+ }
$partstring = &callsub("end_$tokenpat->[1]",
$target, $tokenpat, \@innerparstack,
\@pat, $safeeval, $style_for_target);
@@ -154,6 +217,7 @@ sub recurse {
&decreasedepth($tokenpat);}
}
pop @pat;
+ pop @Apache::lonxml::pwd;
}
return $output;
}
@@ -162,15 +226,16 @@ sub callsub {
my ($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";
+ #&Apache::lonxml::debug("Calling sub $sub in $space<br>\n");
+ $sub1="$space\:\:$sub";
$Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
- $currentstring = &$sub($target,$token,$parstack,$parser,
+ $currentstring = &$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 = $token->[4];
} else {
@@ -190,22 +255,30 @@ sub initdepth {
sub increasedepth {
my ($token) = @_;
- if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
- $#Apache::lonxml::depthcounter--;
- $Apache::lonxml::olddepth=$Apache::lonxml::depth;
- }
$Apache::lonxml::depth++;
-# print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n";
$Apache::lonxml::depthcounter[$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--;
-# print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n";
+ if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
+ $#Apache::lonxml::depthcounter--;
+ $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
+ }
+ if ( $Apache::lonxml::depth < -1) {
+ &Apache::lonxml::error("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 {
@@ -214,6 +287,8 @@ sub get_all_text {
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 = $pars->get_token)) {
if ($token->[0] eq 'T') {
$result.=$token->[1];
@@ -221,25 +296,123 @@ sub get_all_text {
if ($token->[1] eq $tag) { $depth++; }
$result.=$token->[4];
} elsif ($token->[0] eq 'E') {
- if ($token->[1] eq $tag) { $depth--; }
+ if ( $token->[1] eq $tag) { $depth--; }
#skip sending back the last end tag
- if ($depth > -1) { $result.=$token->[2]; }
+ if ($depth > -1) { $result.=$token->[2]; } else {
+ $pars->unget_token($token);
+ }
}
}
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';
+# $Apache::lonxml::debug=1;
+ if ($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 $file = "/home/httpd/html".$request->uri;
+ my %mystyle;
+ my $result = '';
+ $result = Apache::lonxml::xmlparse($target, &Apache::lonnet::getfile($file),'',%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__
+
+
+
+
+
+
+
+
+
+
+
+
+