--- loncom/xml/lonxml.pm 2000/10/11 21:07:59 1.26
+++ loncom/xml/lonxml.pm 2001/03/13 22:44:24 1.56
@@ -2,13 +2,19 @@
# XML Parser Module
#
# last modified 06/26/00 by Alexander Sakharuk
+# 11/6 Gerd Kortemeyer
+# 6/1/1 Gerd Kortemeyer
+# 2/21,3/13 Guy
package Apache::lonxml;
-
+use vars
+qw(@pwd @outputstack $redirection $textredirection $import @extlinks);
use strict;
use HTML::TokeParser;
use Safe;
+use Safe::Hole;
use Opcode;
+use Apache::Constants qw(:common);
sub register {
my $space;
@@ -19,20 +25,39 @@ sub register {
$Apache::lonxml::alltags{$temptag}=$space;
}
}
-
+
+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
-@Apache::lonxml::pwd=();
-$Apache::lonxml::outputstack = '';
-$Apache::lonxml::redirection = 1;
+@pwd=();
+@outputstack = ();
+$redirection = 0;
+$import = 1;
+@extlinks=();
sub xmlparse {
my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
+ if ($target eq 'meta') {
+ &startredirection;
+ $Apache::lonxml::import = 0;
+ } elsif ($target eq 'grade') {
+ &startredirection;
+ $Apache::lonxml::import = 1;
+ } else {
+ $Apache::lonxml::redirection = 0;
+ $Apache::lonxml::import = 1;
+ }
+ #&printalltags();
my @pars = ();
@Apache::lonxml::pwd=();
my $pwd=$ENV{'request.filename'};
@@ -44,9 +69,11 @@ sub xmlparse {
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='.$target.';';
@@ -64,7 +91,6 @@ sub xmlparse {
while ($token = $pars[$#pars]->get_token) {
if ($token->[0] eq 'T') {
$result=$token->[1];
-# $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
} elsif ($token->[0] eq 'S') {
# add tag to stack
push (@stack,$token->[1]);
@@ -72,62 +98,59 @@ sub xmlparse {
push (@parstack,&parstring($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);
- }
-
+ if ($Apache::lonxml::redirection) {
+ $Apache::lonxml::outputstack['-1'] .=
+ &recurse($style_for_target{$token->[1]},$target,$safeeval,
+ \%style_for_target,@parstack);
+ } else {
+ $finaloutput .= &recurse($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') {
#clear out any tags that didn't end
- while ($token->[1] ne $stack[$#stack]
- && ($#stack > -1)) {pop @stack;pop @parstack;&decreasedepth($token);}
+ while ($token->[1] ne $stack[$#stack] && ($#stack > -1)) {
+ &Apache::lonxml::warning("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);
- }
-
+ if ($Apache::lonxml::redirection) {
+ $Apache::lonxml::outputstack['-1'] .=
+ &recurse($style_for_target{'/'."$token->[1]"},
+ $target,$safeeval,\%style_for_target,@parstack);
+ } else {
+ $finaloutput .= &recurse($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);
+ \@pars,$safeeval, \%style_for_target);
}
}
+ #evaluate variable refs in result
if ($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]);
- }
-
+ if ($Apache::lonxml::redirection) {
+ $Apache::lonxml::outputstack['-1'] .=
+ &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]);
+ } else {
+ $finaloutput .= &Apache::run::evaluate($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($token);
}
- if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);}
}
pop @pars;
pop @Apache::lonxml::pwd;
@@ -161,8 +184,10 @@ sub recurse {
} elsif ($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::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);
@@ -202,13 +227,13 @@ sub callsub {
my $sub1;
no strict 'refs';
if (my $space=$Apache::lonxml::alltags{$token->[1]}) {
- #&Apache::lonxml::debug("Calling sub $sub in $space<br>\n");
+ #&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 {
- #&Apache::lonxml::debug("NOT Calling sub $sub in $space<br>\n");
+ #&Apache::lonxml::debug("NOT Calling sub $sub in $space<br />\n");
if (defined($token->[4])) {
$currentstring = $token->[4];
} else {
@@ -220,6 +245,20 @@ sub callsub {
return $currentstring;
}
+sub startredirection {
+ $Apache::lonxml::redirection++;
+ push (@Apache::lonxml::outputstack, '');
+}
+
+sub endredirection {
+ if (!$Apache::lonxml::redirection) {
+ &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuggin information:".join ":",caller);
+ return '';
+ }
+ $Apache::lonxml::redirection--;
+ pop @Apache::lonxml::outputstack;
+}
+
sub initdepth {
@Apache::lonxml::depthcounter=();
$Apache::lonxml::depth=-1;
@@ -228,22 +267,30 @@ sub initdepth {
sub increasedepth {
my ($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::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 {
@@ -253,8 +300,9 @@ sub get_all_text {
my $token;
my $result='';
my $tag=substr($tag,1); #strip the / off the tag
-# &Apache::lonxml::debug("have:$tag:");
+ #&Apache::lonxml::debug("have:$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 ($token->[0] eq 'S') {
@@ -263,15 +311,19 @@ sub get_all_text {
} elsif ($token->[0] eq 'E') {
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);
+ }
}
}
+# &Apache::lonxml::debug("Exit:$result:");
return $result
}
sub newparser {
my ($parser,$contentref,$dir) = @_;
push (@$parser,HTML::TokeParser->new($contentref));
+ $$parser['-1']->xml_mode('1');
if ( $dir eq '' ) {
push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
} else {
@@ -285,38 +337,38 @@ sub parstring {
my ($token) = @_;
my $temp='';
map {
- if ($_=~/\w+/) {
- $temp .= "my \$$_=\"$token->[2]->{$_}\";"
+ unless ($_=~/\W/) {
+ my $val=$token->[2]->{$_};
+ $val =~ s/([\%\@\\])/\\$1/g;
+ #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
+ $temp .= "my \$$_=\"$val\";"
}
} @{$token->[3]};
return $temp;
}
-#<<<<<<< lonxml.pm
+
+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;
- $request->content_type('text/html');
-# $request->send_http_header;
+ $Apache::lonxml::debug=0;
if ($ENV{'browser.mathml'}) {
- $request->print( '<?xml version="1.0"?>'
- .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
- .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
- .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
- .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
- .'xmlns="http://www.w3.org/TR/REC-html40">'
- .'<body bgcolor="#FFFFFF">'."\n");
- } else {
- my $headerstring='<html>';
- if ($ENV{'browser.os'} eq 'mac') {
- $headerstring.="<head>\n"
- .'<meta Content-Type="text/html; charset=x-mac-roman">'
- ."\n</head>\n";
- }
- $request->print($headerstring.'<body bgcolor="#FFFFFF">'."\n");
+ $request->content_type('text/xml');
+ } else {
+ $request->content_type('text/html');
}
+
# $request->print(<<ENDHEADER);
#<html>
#<head>
@@ -325,47 +377,67 @@ sub handler {
#<body bgcolor="#FFFFFF">
#ENDHEADER
# &Apache::lonhomework::send_header($request);
- my $file = "/home/httpd/html".$request->uri;
+ $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 = '';
- $result = Apache::lonxml::xmlparse($target, &Apache::lonnet::getfile($file),'',%mystyle);
-# $request->print("Result follows:");
+ 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(":Result ends");
+
+
+ $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:".$_[0]."<br>\n";
+ print "DEBUG:".$_[0]."<br />\n";
}
}
+
sub error {
- print "ERROR:".$_[0]."<br>\n";
+ if ($Apache::lonxml::debug eq 1) {
+ print "<b>ERROR:</b>".$_[0]."<br />\n";
+ } else {
+ print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
+ #notify author
+ &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
+ #notify course
+ if ( $ENV{'request.course.id'} ) {
+ my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
+ foreach my $user (split /\,/, $users) {
+ ($user,my $domain) = split /:/, $user;
+ &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
+ }
+ }
+
+ #FIXME probably shouldn't have me get everything forever.
+ &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
+ #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
+ }
}
+
sub warning {
if ($Apache::lonxml::debug eq 1) {
- print "WARNING:".$_[0]."<br>\n";
+ print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
}
}
1;
__END__
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