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Diff for /loncom/xml/lonxml.pm between versions 1.121 and 1.140

version 1.121, 2001/08/20 23:31:08 version 1.140, 2001/11/29 21:38:17
Line 1 Line 1
 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # XML Parser Module   # XML Parser Module 
 #  #
   # $Id$
   #
   # 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  # last modified 06/26/00 by Alexander Sakharuk
 # 11/6 Gerd Kortemeyer  # 11/6 Gerd Kortemeyer
 # 6/1/1 Gerd Kortemeyer  # 6/1/1 Gerd Kortemeyer
Line 13 Line 48
 # 6/12,6/13 H. K. Ng  # 6/12,6/13 H. K. Ng
 # 6/16 Gerd Kortemeyer  # 6/16 Gerd Kortemeyer
 # 7/27 H. K. Ng  # 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;   package Apache::lonxml; 
 use vars   use vars 
Line 46  use Apache::scripttag; Line 84  use Apache::scripttag;
 use Apache::edit;  use Apache::edit;
 use Apache::lonnet;  use Apache::lonnet;
 use Apache::File;  use Apache::File;
   use Apache::loncommon;
   
 #==================================================   Main subroutine: xmlparse    #==================================================   Main subroutine: xmlparse  
 #debugging control, to turn on debugging modify the correct handler  #debugging control, to turn on debugging modify the correct handler
Line 216  sub maketoken { Line 255  sub maketoken {
 }  }
   
 sub printtokenheader {  sub printtokenheader {
     my ($target,$token,$symb,$tuname,$tudom,$tcrsid)=@_;      my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
     unless ($token) { return ''; }      unless ($token) { return ''; }
   
     unless ($symb) {      my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
  $symb=&Apache::lonnet::symbread();      unless ($tsymb) {
    $tsymb=$symb;
     }      }
     unless ($tuname) {      unless ($tuname) {
  $tuname=$ENV{'user.name'};   $tuname=$name;
         $tudom=$ENV{'user.domain'};          $tudom=$domain;
         $tcrsid=$ENV{'request.course.id'};          $tcrsid=$courseid;
     }      }
   
     my %reply=&Apache::lonnet::get('environment',      my %reply=&Apache::lonnet::get('environment',
Line 260  sub fontsettings() { Line 300  sub fontsettings() {
   
 sub registerurl {  sub registerurl {
     my $forcereg=shift;      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;      $Apache::lonxml::registered=1;
     if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {      if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
         my $hwkadd='';          my $hwkadd='';
Line 323  ENDPARM Line 367  ENDPARM
   menu=window.open("","LONCAPAmenu");    menu=window.open("","LONCAPAmenu");
           menu.currentStale=1;            menu.currentStale=1;
           menu.switchbutton            menu.switchbutton
             (3,1,'reload.gif','return','location','go(currentURL)');               (3,1,'reload.gif','return','location','go(currentURL)');
           menu.clearbut(7,1);            menu.clearbut(7,1);
           menu.clearbut(7,2);            menu.clearbut(7,2);
           menu.clearbut(7,3);            menu.clearbut(7,3);
Line 408  sub xmlparse { Line 452  sub xmlparse {
   
  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,   my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
    $safeeval,\%style_for_target);     $safeeval,\%style_for_target);
    if ($ENV{'request.uri'}) {
       &writeallows($ENV{'request.uri'});
    }
  return $finaloutput;   return $finaloutput;
 }  }
   
Line 417  sub htmlclean { Line 463  sub htmlclean {
   
     my $tree = HTML::TreeBuilder->new;      my $tree = HTML::TreeBuilder->new;
     $tree->ignore_unknown(0);      $tree->ignore_unknown(0);
       
     $tree->parse($raw);      $tree->parse($raw);
   
     my $output= $tree->as_HTML(undef,' ');      my $output= $tree->as_HTML(undef,' ');
        
     $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;      $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
     $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;      $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
     unless ($full) {      unless ($full) {
Line 449  sub inner_xmlparse { Line 495  sub inner_xmlparse {
   $result=$token->[2];    $result=$token->[2];
  }   }
       } elsif ($token->[0] eq 'S') {        } elsif ($token->[0] eq 'S') {
  # 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{$token->[1]}) {
   if ($Apache::lonxml::redirection) {    if ($Apache::lonxml::redirection) {
     $Apache::lonxml::outputstack['-1'] .=        $Apache::lonxml::outputstack['-1'] .=
       &recurse($$style_for_target{$token->[1]},$target,$safeeval,        &recurse($$style_for_target{$token->[1]},$target,$safeeval,
        $style_for_target,@$parstack);         $style_for_target,@$parstack);
   } else {    } else {
Line 466  sub inner_xmlparse { Line 512  sub inner_xmlparse {
  } else {   } else {
   $result = &callsub("start_$token->[1]", $target, $token, $stack,    $result = &callsub("start_$token->[1]", $target, $token, $stack,
      $parstack, $pars, $safeeval, $style_for_target);       $parstack, $pars, $safeeval, $style_for_target);
  }                 }
       } elsif ($token->[0] eq 'E') {        } elsif ($token->[0] eq 'E') {
  #clear out any tags that didn't end   #clear out any tags that didn't end
  while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {   while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
   &Apache::lonxml::warning("Unbalanced tags in resource $$stack['-1']");    &Apache::lonxml::warning('Missing tag &lt;/'.$$stack['-1'].'&gt; in file');
   &end_tag($stack,$parstack,$token);    &end_tag($stack,$parstack,$token);
  }   }
   
  if (exists $$style_for_target{'/'."$token->[1]"}) {   if (exists($$style_for_target{'/'."$token->[1]"})) {
   if ($Apache::lonxml::redirection) {    if ($Apache::lonxml::redirection) {
     $Apache::lonxml::outputstack['-1'] .=        $Apache::lonxml::outputstack['-1'] .=  
       &recurse($$style_for_target{'/'."$token->[1]"},        &recurse($$style_for_target{'/'."$token->[1]"},
Line 484  sub inner_xmlparse { Line 530  sub inner_xmlparse {
      $target,$safeeval,$style_for_target,       $target,$safeeval,$style_for_target,
      @$parstack);       @$parstack);
   }    }
       
  } else {   } else {
   $result = &callsub("end_$token->[1]", $target, $token, $stack,    $result = &callsub("end_$token->[1]", $target, $token, $stack,
      $parstack, $pars,$safeeval, $style_for_target);       $parstack, $pars,$safeeval, $style_for_target);
Line 535  sub recurse { Line 580  sub recurse {
   my $partstring = '';    my $partstring = '';
   my $output='';    my $output='';
   my $decls='';    my $decls='';
     &Apache::lonxml::debug("Recursing");
   while ( $#pat > -1 ) {    while ( $#pat > -1 ) {
     while  ($tokenpat = $pat[$#pat]->get_token) {      while  ($tokenpat = $pat[$#pat]->get_token) {
       if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {        if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
Line 552  sub recurse { Line 598  sub recurse {
  #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] 
        && ($#innerstack > -1)) {         && ($#innerstack > -1)) {
   &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");    &Apache::lonxml::warning('Missing tag &lt;/'.$innerstack['-1'].'&gt; in style');
   &end_tag(\@innerstack,\@innerparstack,$tokenpat);    &end_tag(\@innerstack,\@innerparstack,$tokenpat);
  }   }
  $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,   $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
Line 586  sub recurse { Line 632  sub recurse {
     pop @pat;      pop @pat;
     pop @Apache::lonxml::pwd;      pop @Apache::lonxml::pwd;
   }    }
     &Apache::lonxml::debug("Exiting Recursing");
   return $output;    return $output;
 }  }
   
Line 656  sub setup_globals { Line 703  sub setup_globals {
   my ($target)=@_;    my ($target)=@_;
   $Apache::lonxml::registered = 0;    $Apache::lonxml::registered = 0;
   @Apache::lonxml::pwd=();    @Apache::lonxml::pwd=();
     @Apache::lonxml::extlinks=();
   if ($target eq 'meta') {    if ($target eq 'meta') {
     $Apache::lonxml::redirection = 0;      $Apache::lonxml::redirection = 0;
     $Apache::lonxml::metamode = 1;      $Apache::lonxml::metamode = 1;
     $Apache::lonxml::evaluate = 1;      $Apache::lonxml::evaluate = 1;
     $Apache::lonxml::import = 0;      $Apache::lonxml::import = 0;
     } elsif ($target eq 'answer') {
       $Apache::lonxml::redirection = 0;
       $Apache::lonxml::metamode = 1;
       $Apache::lonxml::evaluate = 1;
       $Apache::lonxml::import = 1;
   } elsif ($target eq 'grade') {    } elsif ($target eq 'grade') {
     &startredirection;      &startredirection;
     $Apache::lonxml::metamode = 0;      $Apache::lonxml::metamode = 0;
Line 738  sub init_safespace { Line 791  sub init_safespace {
 # $safeeval->deny(":base_orig");  # $safeeval->deny(":base_orig");
   $safeinit .= ';$external::target="'.$target.'";';    $safeinit .= ';$external::target="'.$target.'";';
   my $rndseed;    my $rndseed;
   if (exists(&Apache::lonhomework::whichuser)) {    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
     my ($symb,$courseid,$domain,$name) = &Apache::lonhomework::whichuser();    $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
     $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);  
   } else {  
     $rndseed=&Apache::lonnet::rndseed();  
   }  
   $safeinit .= ';$external::randomseed='.$rndseed.';';    $safeinit .= ';$external::randomseed='.$rndseed.';';
   &Apache::run::run($safeinit,$safeeval);    &Apache::run::run($safeinit,$safeeval);
 }  }
Line 795  sub decreasedepth { Line 844  sub decreasedepth {
     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;      $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
   }    }
   if (  $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';      $Apache::lonxml::depth='-1';
   }    }
   my $curdepth=join('_',@Apache::lonxml::depthcounter);    my $curdepth=join('_',@Apache::lonxml::depthcounter);
Line 879  sub parstring { Line 928  sub parstring {
 }  }
   
 sub writeallows {  sub writeallows {
       unless ($#extlinks>=0) { return; }
     my $thisurl='/res/'.&Apache::lonnet::declutter(shift);      my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
     if ($ENV{'httpref.'.$thisurl}) {      if ($ENV{'httpref.'.$thisurl}) {
  $thisurl=$ENV{'httpref.'.$thisurl};   $thisurl=$ENV{'httpref.'.$thisurl};
Line 888  sub writeallows { Line 938  sub writeallows {
     my %httpref=();      my %httpref=();
     map {      map {
        $httpref{'httpref.'.         $httpref{'httpref.'.
          &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;              } @extlinks;           &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
       } @extlinks;
       @extlinks=();
     &Apache::lonnet::appenv(%httpref);      &Apache::lonnet::appenv(%httpref);
 }  }
   
Line 992  sub handler { Line 1044  sub handler {
   } else {    } else {
     $request->content_type('text/html');      $request->content_type('text/html');
   }    }
       &Apache::loncommon::no_cache($request); 
   $request->send_http_header;    $request->send_http_header;
       
   return OK if $request->header_only;    return OK if $request->header_only;
Line 1037  ENDNOTFOUND Line 1089  ENDNOTFOUND
   unless ($ENV{'request.state'} eq 'published') {    unless ($ENV{'request.state'} eq 'published') {
       $result=&inserteditinfo($result,$filecontents);        $result=&inserteditinfo($result,$filecontents);
   }    }
     
     writeallows($request->uri);
   
   $request->print($result);    $request->print($result);
   
   writeallows($request->uri);  
   return OK;    return OK;
 }  }
     
Line 1083  sub get_param { Line 1136  sub get_param {
   if ( ! $context ) { $context = -1; }    if ( ! $context ) { $context = -1; }
   my $args ='';    my $args ='';
   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }    if ( $#$parstack > (-2-$context) ) { $args=$$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 {  sub register_insert {
Line 1096  sub register_insert { Line 1167  sub register_insert {
     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }      if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
     if ( $line =~ /TABLE/ ) { last; }      if ( $line =~ /TABLE/ ) { last; }
     my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);      my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
     $insertlist{"$tagnum.tag"} = $tag;      if ($tag) {
     $insertlist{"$tagnum.description"} = $descrip;        $insertlist{"$tagnum.tag"} = $tag;
     $insertlist{"$tagnum.color"} = $color;        $insertlist{"$tagnum.description"} = $descrip;
     $insertlist{"$tagnum.function"} = $function;        $insertlist{"$tagnum.color"} = $color;
     $insertlist{"$tagnum.show"}= $show;        $insertlist{"$tagnum.function"} = $function;
     $insertlist{"$tag.num"}=$tagnum;        if (!defined($show)) { $show='yes'; }
     $tagnum++;        $insertlist{"$tagnum.show"}= $show;
         $insertlist{"$tag.num"}=$tagnum;
         $tagnum++;
       }
   }    }
   $i++; #skipping TABLE line    $i++; #skipping TABLE line
   $tagnum = 0;    $tagnum = 0;
Line 1123  sub register_insert { Line 1197  sub register_insert {
   
 sub description {  sub description {
   my ($token)=@_;    my ($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;  1;
 __END__  __END__
   
Removed from v.1.121  
changed lines
  Added in v.1.140

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