--- loncom/xml/lonxml.pm 2001/08/20 16:12:46 1.120
+++ loncom/xml/lonxml.pm 2001/11/29 21:38:17 1.140
@@ -1,6 +1,41 @@
# The LearningOnline Network with CAPA
# XML Parser Module
#
+# $Id: lonxml.pm,v 1.140 2001/11/29 21:38:17 albertel Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+# Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
+# TtHfunc and TtMfunc (the "Code") may be compiled and linked into
+# binary executable programs or libraries distributed by the
+# Michigan State University (the "Licensee"), but any binaries so
+# distributed are hereby licensed only for use in the context
+# of a program or computational system for which the Licensee is the
+# primary author or distributor, and which performs substantial
+# additional tasks beyond the translation of (La)TeX into HTML.
+# The C source of the Code may not be distributed by the Licensee
+# to any other parties under any circumstances.
+#
# last modified 06/26/00 by Alexander Sakharuk
# 11/6 Gerd Kortemeyer
# 6/1/1 Gerd Kortemeyer
@@ -13,7 +48,10 @@
# 6/12,6/13 H. K. Ng
# 6/16 Gerd Kortemeyer
# 7/27 H. K. Ng
-# 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20 Gerd Kortemeyer
+# 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
+# Guy Albertelli
+# 9/26 Gerd Kortemeyer
+
package Apache::lonxml;
use vars
@@ -46,6 +84,7 @@ use Apache::scripttag;
use Apache::edit;
use Apache::lonnet;
use Apache::File;
+use Apache::loncommon;
#================================================== Main subroutine: xmlparse
#debugging control, to turn on debugging modify the correct handler
@@ -216,16 +255,17 @@ sub maketoken {
}
sub printtokenheader {
- my ($target,$token,$symb,$tuname,$tudom,$tcrsid)=@_;
+ my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
unless ($token) { return ''; }
- unless ($symb) {
- $symb=&Apache::lonnet::symbread();
+ my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+ unless ($tsymb) {
+ $tsymb=$symb;
}
unless ($tuname) {
- $tuname=$ENV{'user.name'};
- $tudom=$ENV{'user.domain'};
- $tcrsid=$ENV{'request.course.id'};
+ $tuname=$name;
+ $tudom=$domain;
+ $tcrsid=$courseid;
}
my %reply=&Apache::lonnet::get('environment',
@@ -245,7 +285,7 @@ sub printtokenheader {
'<br />DocID: '.$token.
'<br />Time: '.localtime().'<hr />';
} else {
- return $token;
+ return $token;
}
}
@@ -260,7 +300,11 @@ sub fontsettings() {
sub registerurl {
my $forcereg=shift;
- if ($Apache::lonxml::registered) { return ''; }
+ if ($ENV{'request.publicaccess'}) {
+ return
+ '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
+ }
+ if ($Apache::lonxml::registered && !$forcereg) { return ''; }
$Apache::lonxml::registered=1;
if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
my $hwkadd='';
@@ -323,7 +367,7 @@ ENDPARM
menu=window.open("","LONCAPAmenu");
menu.currentStale=1;
menu.switchbutton
- (3,1,'reload.gif','return','location','go(currentURL)');
+ (3,1,'reload.gif','return','location','go(currentURL)');
menu.clearbut(7,1);
menu.clearbut(7,2);
menu.clearbut(7,3);
@@ -408,7 +452,9 @@ sub xmlparse {
my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
$safeeval,\%style_for_target);
-
+ if ($ENV{'request.uri'}) {
+ &writeallows($ENV{'request.uri'});
+ }
return $finaloutput;
}
@@ -417,11 +463,11 @@ sub htmlclean {
my $tree = HTML::TreeBuilder->new;
$tree->ignore_unknown(0);
-
+
$tree->parse($raw);
my $output= $tree->as_HTML(undef,' ');
-
+
$output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
$output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
unless ($full) {
@@ -435,7 +481,6 @@ sub htmlclean {
sub inner_xmlparse {
my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
- &Apache::lonxml::debug('Reentrant parser starting, again?');
my $finaloutput = '';
my $result;
my $token;
@@ -450,14 +495,14 @@ sub inner_xmlparse {
$result=$token->[2];
}
} elsif ($token->[0] eq 'S') {
- # add tag to stack
+ # add tag to stack
push (@$stack,$token->[1]);
# add parameters list to another stack
push (@$parstack,&parstring($token));
- &increasedepth($token);
+ &increasedepth($token);
if (exists $$style_for_target{$token->[1]}) {
if ($Apache::lonxml::redirection) {
- $Apache::lonxml::outputstack['-1'] .=
+ $Apache::lonxml::outputstack['-1'] .=
&recurse($$style_for_target{$token->[1]},$target,$safeeval,
$style_for_target,@$parstack);
} else {
@@ -467,15 +512,15 @@ sub inner_xmlparse {
} else {
$result = &callsub("start_$token->[1]", $target, $token, $stack,
$parstack, $pars, $safeeval, $style_for_target);
- }
+ }
} elsif ($token->[0] eq 'E') {
#clear out any tags that didn't end
while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
- &Apache::lonxml::warning("Unbalanced tags in resource $$stack['-1']");
+ &Apache::lonxml::warning('Missing tag </'.$$stack['-1'].'> in file');
&end_tag($stack,$parstack,$token);
}
-
- if (exists $$style_for_target{'/'."$token->[1]"}) {
+
+ if (exists($$style_for_target{'/'."$token->[1]"})) {
if ($Apache::lonxml::redirection) {
$Apache::lonxml::outputstack['-1'] .=
&recurse($$style_for_target{'/'."$token->[1]"},
@@ -485,7 +530,6 @@ sub inner_xmlparse {
$target,$safeeval,$style_for_target,
@$parstack);
}
-
} else {
$result = &callsub("end_$token->[1]", $target, $token, $stack,
$parstack, $pars,$safeeval, $style_for_target);
@@ -536,6 +580,7 @@ sub recurse {
my $partstring = '';
my $output='';
my $decls='';
+ &Apache::lonxml::debug("Recursing");
while ( $#pat > -1 ) {
while ($tokenpat = $pat[$#pat]->get_token) {
if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
@@ -553,7 +598,7 @@ sub recurse {
#clear out any tags that didn't end
while ($tokenpat->[1] ne $innerstack[$#innerstack]
&& ($#innerstack > -1)) {
- &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
+ &Apache::lonxml::warning('Missing tag </'.$innerstack['-1'].'> in style');
&end_tag(\@innerstack,\@innerparstack,$tokenpat);
}
$partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
@@ -587,6 +632,7 @@ sub recurse {
pop @pat;
pop @Apache::lonxml::pwd;
}
+ &Apache::lonxml::debug("Exiting Recursing");
return $output;
}
@@ -657,11 +703,17 @@ sub setup_globals {
my ($target)=@_;
$Apache::lonxml::registered = 0;
@Apache::lonxml::pwd=();
+ @Apache::lonxml::extlinks=();
if ($target eq 'meta') {
$Apache::lonxml::redirection = 0;
$Apache::lonxml::metamode = 1;
$Apache::lonxml::evaluate = 1;
$Apache::lonxml::import = 0;
+ } elsif ($target eq 'answer') {
+ $Apache::lonxml::redirection = 0;
+ $Apache::lonxml::metamode = 1;
+ $Apache::lonxml::evaluate = 1;
+ $Apache::lonxml::import = 1;
} elsif ($target eq 'grade') {
&startredirection;
$Apache::lonxml::metamode = 0;
@@ -738,7 +790,10 @@ sub init_safespace {
#need to inspect this class of ops
# $safeeval->deny(":base_orig");
$safeinit .= ';$external::target="'.$target.'";';
- $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
+ my $rndseed;
+ my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+ $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
+ $safeinit .= ';$external::randomseed='.$rndseed.';';
&Apache::run::run($safeinit,$safeeval);
}
@@ -789,7 +844,7 @@ sub decreasedepth {
$Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
}
if ( $Apache::lonxml::depth < -1) {
- &Apache::lonxml::warning("Unbalanced tags in resource");
+ &Apache::lonxml::warning("Missing tags, unable to properly run file.");
$Apache::lonxml::depth='-1';
}
my $curdepth=join('_',@Apache::lonxml::depthcounter);
@@ -873,6 +928,7 @@ sub parstring {
}
sub writeallows {
+ unless ($#extlinks>=0) { return; }
my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
if ($ENV{'httpref.'.$thisurl}) {
$thisurl=$ENV{'httpref.'.$thisurl};
@@ -882,7 +938,9 @@ sub writeallows {
my %httpref=();
map {
$httpref{'httpref.'.
- &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
+ &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
+ } @extlinks;
+ @extlinks=();
&Apache::lonnet::appenv(%httpref);
}
@@ -986,7 +1044,7 @@ sub handler {
} else {
$request->content_type('text/html');
}
-
+ &Apache::loncommon::no_cache($request);
$request->send_http_header;
return OK if $request->header_only;
@@ -1031,10 +1089,11 @@ ENDNOTFOUND
unless ($ENV{'request.state'} eq 'published') {
$result=&inserteditinfo($result,$filecontents);
}
+
+ writeallows($request->uri);
$request->print($result);
- writeallows($request->uri);
return OK;
}
@@ -1077,7 +1136,25 @@ sub get_param {
if ( ! $context ) { $context = -1; }
my $args ='';
if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
- return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
+ if ( $args =~ /my \$$param=\"/ ) {
+ return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
+ } else {
+ return undef;
+ }
+}
+
+sub get_param_var {
+ my ($param,$parstack,$safeeval,$context) = @_;
+ if ( ! $context ) { $context = -1; }
+ my $args ='';
+ if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
+ if ( $args !~ /my \$$param=\"/ ) { return undef; }
+ my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
+ if ($value =~ /^[\$\@\%]/) {
+ return &Apache::run::run("return $value",$safeeval,1);
+ } else {
+ return $value;
+ }
}
sub register_insert {
@@ -1090,13 +1167,16 @@ sub register_insert {
if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
if ( $line =~ /TABLE/ ) { last; }
my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
- $insertlist{"$tagnum.tag"} = $tag;
- $insertlist{"$tagnum.description"} = $descrip;
- $insertlist{"$tagnum.color"} = $color;
- $insertlist{"$tagnum.function"} = $function;
- $insertlist{"$tagnum.show"}= $show;
- $insertlist{"$tag.num"}=$tagnum;
- $tagnum++;
+ if ($tag) {
+ $insertlist{"$tagnum.tag"} = $tag;
+ $insertlist{"$tagnum.description"} = $descrip;
+ $insertlist{"$tagnum.color"} = $color;
+ $insertlist{"$tagnum.function"} = $function;
+ if (!defined($show)) { $show='yes'; }
+ $insertlist{"$tagnum.show"}= $show;
+ $insertlist{"$tag.num"}=$tagnum;
+ $tagnum++;
+ }
}
$i++; #skipping TABLE line
$tagnum = 0;
@@ -1117,8 +1197,41 @@ sub register_insert {
sub description {
my ($token)=@_;
- return $insertlist{$insertlist{"$token->[1].num"}.'.description'};
+ my $tagnum;
+ my $tag=$token->[1];
+ foreach my $namespace (reverse @Apache::lonxml::namespace) {
+ my $testtag=$namespace.'::'.$tag;
+ $tagnum=$insertlist{"$testtag.num"};
+ if (defined($tagnum)) { last; }
+ }
+ if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
+ return $insertlist{$tagnum.'.description'};
+}
+
+# ----------------------------------------------------------------- whichuser
+# returns a list of $symb, $courseid, $domain, $name that is correct for
+# calls to lonnet functions for this setup.
+# - looks for form.grade_ parameters
+sub whichuser {
+ my ($symb,$courseid,$domain,$name);
+ if (defined($ENV{'form.grade_symb'})) {
+ my $tmp_courseid=$ENV{'form.grade_courseid'};
+ my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
+ if ($allowed) {
+ $symb=$ENV{'form.grade_symb'};
+ $courseid=$ENV{'form.grade_courseid'};
+ $domain=$ENV{'form.grade_domain'};
+ $name=$ENV{'form.grade_username'};
+ }
+ } else {
+ $symb=&Apache::lonnet::symbread();
+ $courseid=$ENV{'request.course.id'};
+ $domain=$ENV{'user.domain'};
+ $name=$ENV{'user.name'};
+ }
+ return ($symb,$courseid,$domain,$name);
}
+
1;
__END__