1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.391 2005/12/06 10:21:18 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40:
41: package Apache::lonxml;
42: use vars
43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount @htmlareafields);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54: use Time::HiRes qw( gettimeofday tv_interval );
55:
56: sub register {
57: my ($space,@taglist) = @_;
58: foreach my $temptag (@taglist) {
59: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
60: }
61: }
62:
63: sub deregister {
64: my ($space,@taglist) = @_;
65: foreach my $temptag (@taglist) {
66: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
67: if ($tempspace eq $space) {
68: pop(@{ $Apache::lonxml::alltags{$temptag} });
69: }
70: }
71: #&printalltags();
72: }
73:
74: use Apache::Constants qw(:common);
75: use Apache::lontexconvert();
76: use Apache::style();
77: use Apache::run();
78: use Apache::londefdef();
79: use Apache::scripttag();
80: use Apache::languagetags();
81: use Apache::edit();
82: use Apache::inputtags();
83: use Apache::outputtags();
84: use Apache::lonnet;
85: use Apache::File();
86: use Apache::loncommon();
87: use Apache::lonfeedback();
88: use Apache::lonmsg();
89: use Apache::loncacc();
90: use Apache::lonlocal;
91:
92: #================================================== Main subroutine: xmlparse
93: #debugging control, to turn on debugging modify the correct handler
94: $Apache::lonxml::debug=0;
95:
96: # keeps count of the number of warnings and errors generated in a parse
97: $warningcount=0;
98: $errorcount=0;
99:
100: #path to the directory containing the file currently being processed
101: @pwd=();
102:
103: #these two are used for capturing a subset of the output for later processing,
104: #don't touch them directly use &startredirection and &endredirection
105: @outputstack = ();
106: $redirection = 0;
107:
108: #controls wheter the <import> tag actually does
109: $import = 1;
110: @extlinks=();
111:
112: # meta mode is a bit weird only some output is to be turned off
113: #<output> tag turns metamode off (defined in londefdef.pm)
114: $metamode = 0;
115:
116: # turns on and of run::evaluate actually derefencing var refs
117: $evaluate = 1;
118:
119: # data structure for eidt mode, determines what tags can go into what other tags
120: %insertlist=();
121:
122: # stores the list of active tag namespaces
123: @namespace=();
124:
125: # has the dynamic menu been updated to know about this resource
126: $Apache::lonxml::registered=0;
127:
128: # a pointer the the Apache request object
129: $Apache::lonxml::request='';
130:
131: # a problem number counter, and check on ether it is used
132: $Apache::lonxml::counter=1;
133: $Apache::lonxml::counter_changed=0;
134:
135: #internal check on whether to look at style defs
136: $Apache::lonxml::usestyle=1;
137:
138: #locations used to store the parameter string for style substitutions
139: $Apache::lonxml::style_values='';
140: $Apache::lonxml::style_end_values='';
141:
142: #array of ssi calls that need to occur after we are done parsing
143: @Apache::lonxml::ssi_info=();
144:
145: #should we do the postag variable interpolation
146: $Apache::lonxml::post_evaluate=1;
147:
148: #a header message to emit in the case of any generated warning or errors
149: $Apache::lonxml::warnings_error_header='';
150:
151: sub xmlbegin {
152: my ($style)=@_;
153: my $output='';
154: @htmlareafields=();
155: if ($env{'browser.mathml'}) {
156: $output='<?xml version="1.0"?>'
157: #.'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'."\n"
158: # .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
159:
160: # .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" [<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">] >'
161: .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">'
162: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
163: .'xmlns="http://www.w3.org/1999/xhtml">';
164: } else {
165: $output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>';
166: }
167: if ($style eq 'encode') {
168: $output=&HTML::Entities::encode($output,'<>&"');
169: }
170: return $output;
171: }
172:
173: sub xmlend {
174: my ($target,$parser)=@_;
175: my $mode='xml';
176: my $status='OPEN';
177: if ($Apache::lonhomework::parsing_a_problem ||
178: $Apache::lonhomework::parsing_a_task ) {
179: $mode='problem';
180: $status=$Apache::inputtags::status[-1];
181: }
182: my $discussion;
183: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
184: ['LONCAPA_INTERNAL_no_discussion']);
185: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
186: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
187: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
188: }
189: if ($target eq 'tex') {
190: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
191: &Apache::lonxml::newparser($parser,\$discussion,'');
192: return '';
193: } else {
194: return $discussion.&Apache::loncommon::endbodytag();
195: }
196: }
197:
198: sub tokeninputfield {
199: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
200: $defhost=~tr/a-z/A-Z/;
201: return (<<ENDINPUTFIELD)
202: <script type="text/javascript">
203: function updatetoken() {
204: var comp=new Array;
205: var barcode=unescape(document.tokeninput.barcode.value);
206: comp=barcode.split('*');
207: if (typeof(comp[0])!="undefined") {
208: document.tokeninput.codeone.value=comp[0];
209: }
210: if (typeof(comp[1])!="undefined") {
211: document.tokeninput.codetwo.value=comp[1];
212: }
213: if (typeof(comp[2])!="undefined") {
214: comp[2]=comp[2].toUpperCase();
215: document.tokeninput.codethree.value=comp[2];
216: }
217: document.tokeninput.barcode.value='';
218: }
219: </script>
220: <form method="post" name="tokeninput">
221: <table border="2" bgcolor="#FFFFBB">
222: <tr><th>DocID Checkin</th></tr>
223: <tr><td>
224: <table>
225: <tr>
226: <td>Scan in Barcode</td>
227: <td><input type="text" size="22" name="barcode"
228: onChange="updatetoken()"/></td>
229: </tr>
230: <tr><td><i>or</i> Type in DocID</td>
231: <td>
232: <input type="text" size="5" name="codeone" />
233: <b><font size="+2">*</font></b>
234: <input type="text" size="5" name="codetwo" />
235: <b><font size="+2">*</font></b>
236: <input type="text" size="10" name="codethree" value="$defhost"
237: onChange="this.value=this.value.toUpperCase()" />
238: </td></tr>
239: </table>
240: </td></tr>
241: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
242: </table>
243: </form>
244: ENDINPUTFIELD
245: }
246:
247: sub maketoken {
248: my ($symb,$tuname,$tudom,$tcrsid)=@_;
249: unless ($symb) {
250: $symb=&Apache::lonnet::symbread();
251: }
252: unless ($tuname) {
253: $tuname=$env{'user.name'};
254: $tudom=$env{'user.domain'};
255: $tcrsid=$env{'request.course.id'};
256: }
257:
258: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
259: }
260:
261: sub printtokenheader {
262: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
263: unless ($token) { return ''; }
264:
265: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
266: unless ($tsymb) {
267: $tsymb=$symb;
268: }
269: unless ($tuname) {
270: $tuname=$name;
271: $tudom=$domain;
272: $tcrsid=$courseid;
273: }
274:
275: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
276:
277: if ($target eq 'web') {
278: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
279: return
280: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
281: &mt('Checked out for').' '.$plainname.
282: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
283: '<br />'.&mt('ID').': '.$idhash{$tuname}.
284: '<br />'.&mt('CourseID').': '.$tcrsid.
285: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
286: '<br />'.&mt('DocID').': '.$token.
287: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
288: } else {
289: return $token;
290: }
291: }
292:
293: sub fontsettings {
294: my $headerstring='';
295: if (($env{'browser.os'} eq 'mac') && (!$env{'browser.mathml'})) {
296: $headerstring.=
297: '<meta Content-Type="text/html; charset=x-mac-roman" />';
298: } elsif (!$env{'browser.mathml'} && $env{'browser.unicode'}) {
299: $headerstring.=
300: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
301: }
302: return $headerstring;
303: }
304:
305: sub printalltags {
306: my $temp;
307: foreach $temp (sort keys %Apache::lonxml::alltags) {
308: &Apache::lonxml::debug("$temp -- ".
309: join(',',@{ $Apache::lonxml::alltags{$temp} }));
310: }
311: }
312:
313: sub xmlparse {
314: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
315:
316: &setup_globals($request,$target);
317: &Apache::inputtags::initialize_inputtags();
318: &Apache::bridgetask::initialize_bridgetask();
319: &Apache::outputtags::initialize_outputtags();
320: &Apache::edit::initialize_edit();
321: &Apache::londefdef::initialize_londefdef();
322:
323: #
324: # do we have a course style file?
325: #
326:
327: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
328: my $bodytext=
329: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
330: if ($bodytext) {
331: foreach my $file (split(',',$bodytext)) {
332: my $location=&Apache::lonnet::filelocation('',$file);
333: my $styletext=&Apache::lonnet::getfile($location);
334: if ($styletext ne '-1') {
335: %style_for_target = (%style_for_target,
336: &Apache::style::styleparser($target,$styletext));
337: }
338: }
339: }
340: } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
341: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
342: my $styletext=&Apache::lonnet::getfile($location);
343: if ($styletext ne '-1') {
344: %style_for_target = (%style_for_target,
345: &Apache::style::styleparser($target,$styletext));
346: }
347: }
348: #&printalltags();
349: my @pars = ();
350: my $pwd=$env{'request.filename'};
351: $pwd =~ s:/[^/]*$::;
352: &newparser(\@pars,\$content_file_string,$pwd);
353:
354: my $safeeval = new Safe;
355: my $safehole = new Safe::Hole;
356: &init_safespace($target,$safeeval,$safehole,$safeinit);
357: #-------------------- Redefinition of the target in the case of compound target
358:
359: ($target, my @tenta) = split('&&',$target);
360:
361: my @stack = ();
362: my @parstack = ();
363: &initdepth();
364: &init_alarm();
365: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
366: $safeeval,\%style_for_target);
367:
368: if ($env{'request.uri'}) {
369: &writeallows($env{'request.uri'});
370: }
371: &do_registered_ssi();
372: if ($Apache::lonxml::counter_changed) { &store_counter() }
373: if ($env{'form.return_only_error_and_warning_counts'}) {
374: return "$errorcount:$warningcount";
375: }
376: return $finaloutput;
377: }
378:
379: sub latex_special_symbols {
380: my ($string,$where)=@_;
381: if ($where eq 'header') {
382: $string =~ s/(\\|_|\^)/ /g;
383: $string =~ s/(\$|%|\{|\})/\\$1/g;
384: $string =~ s/_/ /g;
385: $string=&Apache::lonprintout::character_chart($string);
386: # any & or # leftover should be safe to just escape
387: $string=~s/([^\\])\&/$1\\\&/g;
388: $string=~s/([^\\])\#/$1\\\#/g;
389: } else {
390: $string=~s/\\/\\ensuremath{\\backslash}/g;
391: $string=~s/\\\%|\%/\\\%/g;
392: $string=~s/\\{|{/\\{/g;
393: $string=~s/\\}|}/\\}/g;
394: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
395: $string=~s/\\\$|\$/\\\$/g;
396: $string=~s/\\\_|\_/\\\_/g;
397: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
398: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
399: $string=&Apache::lonprintout::character_chart($string);
400: # any & or # leftover should be safe to just escape
401: $string=~s/\\\&|\&/\\\&/g;
402: $string=~s/\\\#|\#/\\\#/g;
403: $string=~s/\|/\$\\mid\$/g;
404: #single { or } How to escape?
405: }
406: return $string;
407: }
408:
409: sub inner_xmlparse {
410: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
411: my $finaloutput = '';
412: my $result;
413: my $token;
414: my $dontpop=0;
415: my $startredirection = $Apache::lonxml::redirection;
416: while ( $#$pars > -1 ) {
417: while ($token = $$pars['-1']->get_token) {
418: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
419: if ($metamode<1) {
420: my $text=$token->[1];
421: if ($token->[0] eq 'C' && $target eq 'tex') {
422: $text = '';
423: # $text = '%'.$text."\n";
424: }
425: $result.=$text;
426: }
427: } elsif (($token->[0] eq 'D')) {
428: if ($metamode<1 && $target eq 'web') {
429: my $text=$token->[1];
430: $result.=$text;
431: }
432: } elsif ($token->[0] eq 'PI') {
433: if ($metamode<1 && $target eq 'web') {
434: $result=$token->[2];
435: }
436: } elsif ($token->[0] eq 'S') {
437: # add tag to stack
438: push (@$stack,$token->[1]);
439: # add parameters list to another stack
440: push (@$parstack,&parstring($token));
441: &increasedepth($token);
442: if ($Apache::lonxml::usestyle &&
443: exists($$style_for_target{$token->[1]})) {
444: $Apache::lonxml::usestyle=0;
445: my $string=$$style_for_target{$token->[1]}.
446: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
447: &Apache::lonxml::newparser($pars,\$string);
448: $Apache::lonxml::style_values=$$parstack[-1];
449: $Apache::lonxml::style_end_values=$$parstack[-1];
450: } else {
451: $result = &callsub("start_$token->[1]", $target, $token, $stack,
452: $parstack, $pars, $safeeval, $style_for_target);
453: }
454: } elsif ($token->[0] eq 'E') {
455: if ($Apache::lonxml::usestyle &&
456: exists($$style_for_target{'/'."$token->[1]"})) {
457: $Apache::lonxml::usestyle=0;
458: my $string=$$style_for_target{'/'.$token->[1]}.
459: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
460: &Apache::lonxml::newparser($pars,\$string);
461: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
462: $Apache::lonxml::style_end_values='';
463: $dontpop=1;
464: } else {
465: #clear out any tags that didn't end
466: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
467: my $lasttag=$$stack[-1];
468: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
469: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
470: last;
471: } else {
472: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
473: &end_tag($stack,$parstack,$token);
474: }
475: }
476: $result = &callsub("end_$token->[1]", $target, $token, $stack,
477: $parstack, $pars,$safeeval, $style_for_target);
478: }
479: } else {
480: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
481: }
482: #evaluate variable refs in result
483: if ($Apache::lonxml::post_evaluate &&$result ne "") {
484: my $extras;
485: if (!$Apache::lonxml::usestyle) {
486: $extras=$Apache::lonxml::style_values;
487: }
488: if ( $#$parstack > -1 ) {
489: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
490: } else {
491: $result= &Apache::run::evaluate($result,$safeeval,$extras);
492: }
493: }
494: $Apache::lonxml::post_evaluate=1;
495:
496: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
497: #Style file definitions should be correct
498: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
499: $result=&latex_special_symbols($result);
500: }
501: }
502:
503: if ($Apache::lonxml::redirection) {
504: $Apache::lonxml::outputstack['-1'] .= $result;
505: } else {
506: $finaloutput.=$result;
507: }
508: $result = '';
509:
510: if ($token->[0] eq 'E' && !$dontpop) {
511: &end_tag($stack,$parstack,$token);
512: }
513: $dontpop=0;
514: }
515: if ($#$pars > -1) {
516: pop @$pars;
517: pop @Apache::lonxml::pwd;
518: }
519: }
520:
521: # if ($target eq 'meta') {
522: # $finaloutput.=&endredirection;
523: # }
524:
525: if ($target eq 'grade') { &endredirection(); }
526: if ( $Apache::lonxml::redirection > $startredirection) {
527: while ($Apache::lonxml::redirection > $startredirection) {
528: $finaloutput .= &endredirection();
529: }
530: }
531: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
532: $finaloutput=&afterburn($finaloutput);
533: }
534: return $finaloutput;
535: }
536:
537: ##
538: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
539: ## otherwise do not call it as we do not know what it is.
540: ##
541: sub callsub {
542: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
543: my $currentstring='';
544: my $nodefault;
545: {
546: my $sub1;
547: no strict 'refs';
548: my $tag=$token->[1];
549: # get utterly rid of extended html tags
550: if ($tag=~/^x\-/i) { return ''; }
551: my $space=$Apache::lonxml::alltags{$tag}[-1];
552: if (!$space) {
553: $tag=~tr/A-Z/a-z/;
554: $sub=~tr/A-Z/a-z/;
555: $space=$Apache::lonxml::alltags{$tag}[-1]
556: }
557:
558: my $deleted=0;
559: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
560: if (($token->[0] eq 'S') && ($target eq 'modified')) {
561: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
562: $parstack,$parser,$safeeval,
563: $style);
564: }
565: if (!$deleted) {
566: if ($space) {
567: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
568: $sub1="$space\:\:$sub";
569: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
570: $parstack,$parser,$safeeval,
571: $style);
572: } else {
573: if ($target eq 'tex') {
574: # throw away tag name
575: return '';
576: }
577: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
578: if ($metamode <1) {
579: if (defined($token->[4]) && ($metamode < 1)) {
580: $currentstring = $token->[4];
581: } else {
582: $currentstring = $token->[2];
583: }
584: }
585: }
586: # &Apache::lonxml::debug("nodefalt:$nodefault:");
587: if ($currentstring eq '' && $nodefault eq '') {
588: if ($target eq 'edit') {
589: #&Apache::lonxml::debug("doing default edit for $token->[1]");
590: if ($token->[0] eq 'S') {
591: $currentstring = &Apache::edit::tag_start($target,$token);
592: } elsif ($token->[0] eq 'E') {
593: $currentstring = &Apache::edit::tag_end($target,$token);
594: }
595: } elsif ($target eq 'modified') {
596: if ($token->[0] eq 'S') {
597: $currentstring = $token->[4];
598: $currentstring.=&Apache::edit::handle_insert();
599: } elsif ($token->[0] eq 'E') {
600: $currentstring = $token->[2];
601: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
602: } else {
603: $currentstring = $token->[2];
604: }
605: }
606: }
607: }
608: use strict 'refs';
609: }
610: return $currentstring;
611: }
612:
613: sub setup_globals {
614: my ($request,$target)=@_;
615: $Apache::lonxml::request=$request;
616: $Apache::lonxml::registered = 0;
617: @Apache::lonxml::htmlareafields=();
618: $errorcount=0;
619: $warningcount=0;
620: $Apache::lonxml::default_homework_loaded=0;
621: $Apache::lonxml::usestyle=1;
622: &init_counter();
623: @Apache::lonxml::pwd=();
624: @Apache::lonxml::extlinks=();
625: @Apache::lonxml::ssi_info=();
626: $Apache::lonxml::post_evaluate=1;
627: $Apache::lonxml::warnings_error_header='';
628: if ($target eq 'meta') {
629: $Apache::lonxml::redirection = 0;
630: $Apache::lonxml::metamode = 1;
631: $Apache::lonxml::evaluate = 1;
632: $Apache::lonxml::import = 0;
633: } elsif ($target eq 'answer') {
634: $Apache::lonxml::redirection = 0;
635: $Apache::lonxml::metamode = 1;
636: $Apache::lonxml::evaluate = 1;
637: $Apache::lonxml::import = 1;
638: } elsif ($target eq 'grade') {
639: &startredirection(); #ended in inner_xmlparse on exit
640: $Apache::lonxml::metamode = 0;
641: $Apache::lonxml::evaluate = 1;
642: $Apache::lonxml::import = 1;
643: } elsif ($target eq 'modified') {
644: $Apache::lonxml::redirection = 0;
645: $Apache::lonxml::metamode = 0;
646: $Apache::lonxml::evaluate = 0;
647: $Apache::lonxml::import = 0;
648: } elsif ($target eq 'edit') {
649: $Apache::lonxml::redirection = 0;
650: $Apache::lonxml::metamode = 0;
651: $Apache::lonxml::evaluate = 0;
652: $Apache::lonxml::import = 0;
653: } elsif ($target eq 'analyze') {
654: $Apache::lonxml::redirection = 0;
655: $Apache::lonxml::metamode = 0;
656: $Apache::lonxml::evaluate = 1;
657: $Apache::lonxml::import = 1;
658: } else {
659: $Apache::lonxml::redirection = 0;
660: $Apache::lonxml::metamode = 0;
661: $Apache::lonxml::evaluate = 1;
662: $Apache::lonxml::import = 1;
663: }
664: }
665:
666: sub init_safespace {
667: my ($target,$safeeval,$safehole,$safeinit) = @_;
668: $safeeval->deny_only(':dangerous');
669: $safeeval->reval('use Math::Complex;');
670: $safeeval->permit_only(":default");
671: $safeeval->permit("entereval");
672: $safeeval->permit(":base_math");
673: $safeeval->permit("sort");
674: $safeeval->permit("time");
675: $safeeval->deny("rand");
676: $safeeval->deny("srand");
677: $safeeval->deny(":base_io");
678: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
679: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
680: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
681: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
682: '&chem_standard_order');
683: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
684:
685: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
686: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
687: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
688: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
689: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
690: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
691: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
692: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
693: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
694: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
695: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
696: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
697: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
698: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
699: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
700: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
701: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
702: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
703: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
704:
705: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
706: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
707: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
708: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
709: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
710: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
711: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
712: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
713: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
714: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
715: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
716: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
717: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
718: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
719: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
720: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
721: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
722: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
723: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
724: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
725: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
726: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
727:
728: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
729: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
730: '&Math::Cephes::Matrix::new');
731: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
732: '&Math::Cephes::Matrix::coef');
733: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
734: '&Math::Cephes::Matrix::clr');
735: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
736: '&Math::Cephes::Matrix::add');
737: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
738: '&Math::Cephes::Matrix::sub');
739: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
740: '&Math::Cephes::Matrix::mul');
741: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
742: '&Math::Cephes::Matrix::div');
743: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
744: '&Math::Cephes::Matrix::inv');
745: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
746: '&Math::Cephes::Matrix::transp');
747: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
748: '&Math::Cephes::Matrix::simq');
749: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
750: '&Math::Cephes::Matrix::mat_to_vec');
751: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
752: '&Math::Cephes::Matrix::vec_to_mat');
753: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
754: '&Math::Cephes::Matrix::check');
755: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
756: '&Math::Cephes::Matrix::check');
757:
758: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
759: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
760: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
761: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
762: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
763: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
764:
765: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
766: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
767: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
768: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
769: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
770: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
771: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
772: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
773: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
774: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
775: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
776: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
777: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
778: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
779: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
780: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
781: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
782: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
783: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
784: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
785: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
786: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
787: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
788: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
789:
790: #need to inspect this class of ops
791: # $safeeval->deny(":base_orig");
792: $safeeval->permit("require");
793: $safeinit .= ';$external::target="'.$target.'";';
794: &Apache::run::run($safeinit,$safeeval);
795: &initialize_rndseed($safeeval);
796: }
797:
798: sub initialize_rndseed {
799: my ($safeeval)=@_;
800: my $rndseed;
801: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
802: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
803: my $safeinit = '$external::randomseed="'.$rndseed.'";';
804: &Apache::lonxml::debug("Setting rndseed to $rndseed");
805: &Apache::run::run($safeinit,$safeeval);
806: }
807:
808: sub default_homework_load {
809: my ($safeeval)=@_;
810: &Apache::lonxml::debug('Loading default_homework');
811: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
812: if ($default eq -1) {
813: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
814: } else {
815: &Apache::run::run($default,$safeeval);
816: $Apache::lonxml::default_homework_loaded=1;
817: }
818: }
819:
820: {
821: my $alarm_depth;
822: sub init_alarm {
823: alarm(0);
824: $alarm_depth=0;
825: }
826:
827: sub start_alarm {
828: if ($alarm_depth<1) {
829: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
830: if ($old) {
831: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
832: }
833: }
834: $alarm_depth++;
835: }
836:
837: sub end_alarm {
838: $alarm_depth--;
839: if ($alarm_depth<1) { alarm(0); }
840: }
841: }
842: my $metamode_was;
843: sub startredirection {
844: if (!$Apache::lonxml::redirection) {
845: $metamode_was=$Apache::lonxml::metamode;
846: }
847: $Apache::lonxml::metamode=0;
848: $Apache::lonxml::redirection++;
849: push (@Apache::lonxml::outputstack, '');
850: }
851:
852: sub endredirection {
853: if (!$Apache::lonxml::redirection) {
854: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
855: return '';
856: }
857: $Apache::lonxml::redirection--;
858: if (!$Apache::lonxml::redirection) {
859: $Apache::lonxml::metamode=$metamode_was;
860: }
861: pop @Apache::lonxml::outputstack;
862: }
863:
864: sub end_tag {
865: my ($tagstack,$parstack,$token)=@_;
866: pop(@$tagstack);
867: pop(@$parstack);
868: &decreasedepth($token);
869: }
870:
871: sub initdepth {
872: @Apache::lonxml::depthcounter=();
873: $Apache::lonxml::depth=-1;
874: $Apache::lonxml::olddepth=-1;
875: }
876:
877: my @timers;
878: my $lasttime;
879: sub increasedepth {
880: my ($token) = @_;
881: $Apache::lonxml::depth++;
882: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
883: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
884: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
885: }
886: my $time;
887: if ($Apache::lonxml::debug eq "1") {
888: push(@timers,[&gettimeofday()]);
889: $time=&tv_interval($lasttime);
890: $lasttime=[&gettimeofday()];
891: }
892: my $spacing=' 'x($Apache::lonxml::depth-1);
893: my $curdepth=join('_',@Apache::lonxml::depthcounter);
894: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
895: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
896: }
897:
898: sub decreasedepth {
899: my ($token) = @_;
900: $Apache::lonxml::depth--;
901: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
902: $#Apache::lonxml::depthcounter--;
903: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
904: }
905: if ( $Apache::lonxml::depth < -1) {
906: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
907: $Apache::lonxml::depth='-1';
908: }
909: my ($timer,$time);
910: if ($Apache::lonxml::debug eq "1") {
911: $timer=pop(@timers);
912: $time=&tv_interval($lasttime);
913: $lasttime=[&gettimeofday()];
914: }
915: my $spacing=' 'x$Apache::lonxml::depth;
916: my $curdepth=join('_',@Apache::lonxml::depthcounter);
917: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
918: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
919: }
920:
921: sub get_all_text_unbalanced {
922: #there is a copy of this in lonpublisher.pm
923: my($tag,$pars)= @_;
924: my $token;
925: my $result='';
926: $tag='<'.$tag.'>';
927: while ($token = $$pars[-1]->get_token) {
928: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
929: if ($token->[0] eq 'T' && $token->[2]) {
930: $result.='<![CDATA['.$token->[1].']]>';
931: } else {
932: $result.=$token->[1];
933: }
934: } elsif ($token->[0] eq 'PI') {
935: $result.=$token->[2];
936: } elsif ($token->[0] eq 'S') {
937: $result.=$token->[4];
938: } elsif ($token->[0] eq 'E') {
939: $result.=$token->[2];
940: }
941: if ($result =~ /\Q$tag\E/is) {
942: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
943: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
944: #&Apache::lonxml::debug('Result is :'.$1);
945: $redo=$tag.$redo;
946: &Apache::lonxml::newparser($pars,\$redo);
947: last;
948: }
949: }
950: return $result
951: }
952:
953: sub increment_counter {
954: my ($increment) = @_;
955: if (defined($increment) && $increment gt 0) {
956: $Apache::lonxml::counter+=$increment;
957: } else {
958: $Apache::lonxml::counter++;
959: }
960: $Apache::lonxml::counter_changed=1;
961: }
962:
963: sub init_counter {
964: if ($env{'request.state'} eq 'construct') {
965: $Apache::lonxml::counter=1;
966: $Apache::lonxml::counter_changed=1;
967: } elsif (defined($env{'form.counter'})) {
968: $Apache::lonxml::counter=$env{'form.counter'};
969: $Apache::lonxml::counter_changed=0;
970: } else {
971: $Apache::lonxml::counter=1;
972: $Apache::lonxml::counter_changed=1;
973: }
974: }
975:
976: sub store_counter {
977: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
978: return '';
979: }
980:
981: sub get_all_text {
982: my($tag,$pars,$style)= @_;
983: my $gotfullstack=1;
984: if (ref($pars) ne 'ARRAY') {
985: $gotfullstack=0;
986: $pars=[$pars];
987: }
988: if (ref($style) ne 'HASH') {
989: $style={};
990: }
991: my $depth=0;
992: my $token;
993: my $result='';
994: if ( $tag =~ m:^/: ) {
995: my $tag=substr($tag,1);
996: #&Apache::lonxml::debug("have:$tag:");
997: my $top_empty=0;
998: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
999: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1000: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1001: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1002: if ($token->[2]) {
1003: $result.='<![CDATA['.$token->[1].']]>';
1004: } else {
1005: $result.=$token->[1];
1006: }
1007: } elsif ($token->[0] eq 'PI') {
1008: $result.=$token->[2];
1009: } elsif ($token->[0] eq 'S') {
1010: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1011: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1012: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1013: $result.=$token->[4];
1014: } elsif ($token->[0] eq 'E') {
1015: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1016: #skip sending back the last end tag
1017: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1018: my $string=
1019: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1020: $$style{'/'.$token->[1]}.
1021: $token->[2].
1022: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1023: &Apache::lonxml::newparser($pars,\$string);
1024: #&Apache::lonxml::debug("reParsing $string");
1025: next;
1026: }
1027: if ($depth > -1) {
1028: $result.=$token->[2];
1029: } else {
1030: $$pars[-1]->unget_token($token);
1031: }
1032: }
1033: }
1034: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1035: if (($depth >=0) && ($#$pars > 0) ) {
1036: pop(@$pars);
1037: pop(@Apache::lonxml::pwd);
1038: }
1039: }
1040: if ($top_empty && $depth >= 0) {
1041: #never found the end tag ran out of text, throw error send back blank
1042: &error('Never found end tag for <'.$tag.
1043: '> current string <pre>'.
1044: &HTML::Entities::encode($result,'<>&"').
1045: '</pre>');
1046: if ($gotfullstack) {
1047: my $newstring='</'.$tag.'>'.$result;
1048: &Apache::lonxml::newparser($pars,\$newstring);
1049: }
1050: $result='';
1051: }
1052: } else {
1053: while ($#$pars > -1) {
1054: while ($token = $$pars[-1]->get_token) {
1055: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1056: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1057: ($token->[0] eq 'D')) {
1058: if ($token->[2]) {
1059: $result.='<![CDATA['.$token->[1].']]>';
1060: } else {
1061: $result.=$token->[1];
1062: }
1063: } elsif ($token->[0] eq 'PI') {
1064: $result.=$token->[2];
1065: } elsif ($token->[0] eq 'S') {
1066: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1067: $$pars[-1]->unget_token($token); last;
1068: } else {
1069: $result.=$token->[4];
1070: }
1071: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1072: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1073: } elsif ($token->[0] eq 'E') {
1074: $result.=$token->[2];
1075: }
1076: }
1077: if (($#$pars > 0) ) {
1078: pop(@$pars);
1079: pop(@Apache::lonxml::pwd);
1080: } else { last; }
1081: }
1082: }
1083: #&Apache::lonxml::debug("Exit:$result:");
1084: return $result
1085: }
1086:
1087: sub newparser {
1088: my ($parser,$contentref,$dir) = @_;
1089: push (@$parser,HTML::LCParser->new($contentref));
1090: $$parser[-1]->xml_mode(1);
1091: $$parser[-1]->marked_sections(1);
1092: if ( $dir eq '' ) {
1093: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1094: } else {
1095: push (@Apache::lonxml::pwd, $dir);
1096: }
1097: }
1098:
1099: sub parstring {
1100: my ($token) = @_;
1101: my $temp='';
1102: foreach (@{$token->[3]}) {
1103: unless ($_=~/\W/) {
1104: my $val=$token->[2]->{$_};
1105: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1106: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1107: $val =~ s/(\$)$/\\$1/;
1108: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1109: $temp .= "my \$$_=\"$val\";";
1110: }
1111: }
1112: return $temp;
1113: }
1114:
1115: sub extlink {
1116: my ($res,$exact)=@_;
1117: if (!$exact) {
1118: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1119: }
1120: push(@Apache::lonxml::extlinks,$res)
1121: }
1122:
1123: sub writeallows {
1124: unless ($#extlinks>=0) { return; }
1125: my $thisurl = &Apache::lonnet::clutter(shift);
1126: if ($env{'httpref.'.$thisurl}) {
1127: $thisurl=$env{'httpref.'.$thisurl};
1128: }
1129: my $thisdir=$thisurl;
1130: $thisdir=~s/\/[^\/]+$//;
1131: my %httpref=();
1132: foreach (@extlinks) {
1133: $httpref{'httpref.'.
1134: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1135: }
1136: @extlinks=();
1137: &Apache::lonnet::appenv(%httpref);
1138: }
1139:
1140: sub register_ssi {
1141: my ($url,%form)=@_;
1142: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1143: return '';
1144: }
1145:
1146: sub do_registered_ssi {
1147: foreach my $info (@Apache::lonxml::ssi_info) {
1148: my %form=%{ $info->{'form'}};
1149: my $url=$info->{'url'};
1150: &Apache::lonnet::ssi($url,%form);
1151: }
1152: }
1153: #
1154: # Afterburner handles anchors, highlights and links
1155: #
1156: sub afterburn {
1157: my $result=shift;
1158: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1159: ['highlight','anchor','link']);
1160: if ($env{'form.highlight'}) {
1161: foreach (split(/\,/,$env{'form.highlight'})) {
1162: my $anchorname=$_;
1163: my $matchthis=$anchorname;
1164: $matchthis=~s/\_+/\\s\+/g;
1165: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1166: }
1167: }
1168: if ($env{'form.link'}) {
1169: foreach (split(/\,/,$env{'form.link'})) {
1170: my ($anchorname,$linkurl)=split(/\>/,$_);
1171: my $matchthis=$anchorname;
1172: $matchthis=~s/\_+/\\s\+/g;
1173: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1174: }
1175: }
1176: if ($env{'form.anchor'}) {
1177: my $anchorname=$env{'form.anchor'};
1178: my $matchthis=$anchorname;
1179: $matchthis=~s/\_+/\\s\+/g;
1180: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1181: $result.=(<<"ENDSCRIPT");
1182: <script type="text/javascript">
1183: document.location.hash='$anchorname';
1184: </script>
1185: ENDSCRIPT
1186: }
1187: return $result;
1188: }
1189:
1190: sub storefile {
1191: my ($file,$contents)=@_;
1192: &Apache::lonnet::correct_line_ends(\$contents);
1193: if (my $fh=Apache::File->new('>'.$file)) {
1194: print $fh $contents;
1195: $fh->close();
1196: return 1;
1197: } else {
1198: &warning("Unable to save file $file");
1199: return 0;
1200: }
1201: }
1202:
1203: sub createnewhtml {
1204: my $title=&mt('Title of document goes here');
1205: my $body=&mt('Body of document goes here');
1206: my $filecontents=(<<SIMPLECONTENT);
1207: <html>
1208: <head>
1209: <title>$title</title>
1210: </head>
1211: <body bgcolor="#FFFFFF">
1212: $body
1213: </body>
1214: </html>
1215: SIMPLECONTENT
1216: return $filecontents;
1217: }
1218:
1219: sub createnewsty {
1220: my $filecontents=(<<SIMPLECONTENT);
1221: <definetag name="">
1222: <render>
1223: <web></web>
1224: <tex></tex>
1225: </render>
1226: </definetag>
1227: SIMPLECONTENT
1228: return $filecontents;
1229: }
1230:
1231:
1232: sub inserteditinfo {
1233: my ($result,$filecontents,$filetype)=@_;
1234: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1235: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1236: my $xml_help = '';
1237: my $initialize='';
1238: if ($filetype eq 'html') {
1239: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1240: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1241: &Apache::lonhtmlcommon::spellheader();
1242: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1243: &Apache::lonhtmlcommon::htmlareabrowser()) {
1244: $initialize.=(<<FULLPAGE);
1245: <script type="text/javascript">
1246: $addbuttons
1247:
1248: HTMLArea.loadPlugin("FullPage");
1249:
1250: function initDocument() {
1251: var editor=new HTMLArea("filecont",config);
1252: editor.registerPlugin(FullPage);
1253: editor.generate();
1254: }
1255: </script>
1256: FULLPAGE
1257: } else {
1258: $initialize.=(<<FULLPAGE);
1259: <script type="text/javascript">
1260: $addbuttons
1261: function initDocument() {
1262: }
1263: </script>
1264: FULLPAGE
1265: }
1266: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1267: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1268: }
1269: my $cleanbut = '';
1270:
1271: my $titledisplay=&display_title();
1272: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1273: 'vi' => 'View',
1274: 'ed' => 'Edit');
1275: my $buttons=(<<BUTTONS);
1276: $cleanbut
1277: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1278: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1279: BUTTONS
1280: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1281: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1282: my $editfooter=(<<ENDFOOTER);
1283: $initialize
1284: <hr />
1285: <a name="editsection" />
1286: <form method="post" name="xmledit">
1287: $xml_help
1288: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1289: $buttons<br />
1290: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1291: <br />$buttons
1292: <br />
1293: </form>
1294: $titledisplay
1295: </body>
1296: ENDFOOTER
1297: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1298: $result=~s/(\<\/body\>)/$editfooter/is;
1299: return $result;
1300: }
1301:
1302: sub get_target {
1303: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1304: if ( $env{'request.state'} eq 'published') {
1305: if ( defined($env{'form.grade_target'})
1306: && ($viewgrades == 'F' )) {
1307: return ($env{'form.grade_target'});
1308: } elsif (defined($env{'form.grade_target'})) {
1309: if (($env{'form.grade_target'} eq 'web') ||
1310: ($env{'form.grade_target'} eq 'tex') ) {
1311: return $env{'form.grade_target'}
1312: } else {
1313: return 'web';
1314: }
1315: } else {
1316: return 'web';
1317: }
1318: } elsif ($env{'request.state'} eq 'construct') {
1319: if ( defined($env{'form.grade_target'})) {
1320: return ($env{'form.grade_target'});
1321: } else {
1322: return 'web';
1323: }
1324: } else {
1325: return 'web';
1326: }
1327: }
1328:
1329: sub handler {
1330: my $request=shift;
1331:
1332: my $target=&get_target();
1333:
1334: $Apache::lonxml::debug=$env{'user.debug'};
1335:
1336: &Apache::loncommon::content_type($request,'text/html');
1337: &Apache::loncommon::no_cache($request);
1338: if ($env{'request.state'} eq 'published') {
1339: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1340: 'lastrevisiondate'));
1341: }
1342: $request->send_http_header;
1343:
1344: return OK if $request->header_only;
1345:
1346:
1347: my $file=&Apache::lonnet::filelocation("",$request->uri);
1348: my $filetype;
1349: if ($file =~ /\.sty$/) {
1350: $filetype='sty';
1351: } else {
1352: $filetype='html';
1353: }
1354: #
1355: # Edit action? Save file.
1356: #
1357: unless ($env{'request.state'} eq 'published') {
1358: if ($env{'form.savethisfile'}) {
1359: if (&storefile($file,$env{'form.filecont'})) {
1360: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1361: &mt('Updated').": ".
1362: &Apache::lonlocal::locallocaltime(time).
1363: " </font>");
1364: }
1365: }
1366: }
1367: my %mystyle;
1368: my $result = '';
1369: my $filecontents=&Apache::lonnet::getfile($file);
1370: if ($filecontents eq -1) {
1371: my $bodytag=&Apache::loncommon::bodytag('File Error');
1372: my $fnf=&mt('File not found');
1373: $result=(<<ENDNOTFOUND);
1374: <html>
1375: <head>
1376: <title>$fnf</title>
1377: </head>
1378: $bodytag
1379: <b>$fnf: $file</b>
1380: </body>
1381: </html>
1382: ENDNOTFOUND
1383: $filecontents='';
1384: if ($env{'request.state'} ne 'published') {
1385: if ($filetype eq 'sty') {
1386: $filecontents=&createnewsty();
1387: } else {
1388: $filecontents=&createnewhtml();
1389: }
1390: $env{'form.editmode'}='Edit'; #force edit mode
1391: }
1392: } else {
1393: unless ($env{'request.state'} eq 'published') {
1394: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1395: &Apache::lonxml::error(&mt('This file appears to be a rendering of a LON-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1396: }
1397: #
1398: # we are in construction space, see if edit mode forced
1399: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1400: ['editmode']);
1401: }
1402: if (!$env{'form.editmode'} || $env{'form.viewmode'}) {
1403: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1404: '',%mystyle);
1405: undef($Apache::lonhomework::parsing_a_task);
1406: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1407: ['rawmode']);
1408: if ($env{'rawmode'}) { $result = $filecontents; }
1409: }
1410: }
1411:
1412: #
1413: # Edit action? Insert editing commands
1414: #
1415: unless ($env{'request.state'} eq 'published') {
1416: if ($env{'form.editmode'} && (!($env{'form.viewmode'}))) {
1417: my $displayfile=$request->uri;
1418: $displayfile=~s/^\/[^\/]*//;
1419: my $bodytag='<body bgcolor="#FFFFFF">';
1420: if ($env{'environment.remote'} eq 'off') {
1421: $bodytag=&Apache::loncommon::bodytag();
1422: }
1423: $result='<html>'.$bodytag.
1424: &Apache::lonxml::message_location().'<h3>'.
1425: $displayfile.
1426: '</h3></body></html>';
1427: $result=&inserteditinfo($result,$filecontents,$filetype);
1428: }
1429: }
1430: if ($filetype eq 'html') { writeallows($request->uri); }
1431:
1432:
1433: &Apache::lonxml::add_messages(\$result);
1434: $request->print($result);
1435:
1436: return OK;
1437: }
1438:
1439: sub display_title {
1440: my $result;
1441: if ($env{'request.state'} eq 'construct') {
1442: my $title=&Apache::lonnet::gettitle();
1443: if (!defined($title) || $title eq '') {
1444: $title = $env{'request.filename'};
1445: $title = substr($title, rindex($title, '/') + 1);
1446: }
1447: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1448: }
1449: return $result;
1450: }
1451:
1452: sub debug {
1453: if ($Apache::lonxml::debug eq "1") {
1454: $|=1;
1455: my $request=$Apache::lonxml::request;
1456: if (!$request) {
1457: eval { $request=Apache->request; };
1458: }
1459: if (!$request) {
1460: eval { $request=Apache2::RequestUtil->request; };
1461: }
1462: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1463: #&Apache::lonnet::logthis($_[0]);
1464: }
1465: }
1466:
1467: sub show_error_warn_msg {
1468: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1469: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1470: return 1;
1471: }
1472: return (($Apache::lonxml::debug eq 1) ||
1473: ($env{'request.state'} eq 'construct') ||
1474: ($Apache::lonhomework::browse eq 'F'
1475: &&
1476: $env{'form.show_errors'} eq 'on'));
1477: }
1478:
1479: sub error {
1480: $errorcount++;
1481: if ( &show_error_warn_msg() ) {
1482: # If printing in construction space, put the error inside <pre></pre>
1483: push(@Apache::lonxml::error_messages,
1484: $Apache::lonxml::warnings_error_header.
1485: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1486: $Apache::lonxml::warnings_error_header='';
1487: } else {
1488: my $errormsg;
1489: my ($symb)=&Apache::lonnet::symbread();
1490: if ( !$symb ) {
1491: #public or browsers
1492: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1493: }
1494: #notify author
1495: &Apache::lonmsg::author_res_msg($env{'request.filename'},join('<br />',@_));
1496: #notify course
1497: if ( $symb && $env{'request.course.id'} ) {
1498: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1499: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1500: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1501: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1502: my @userlist;
1503: foreach (keys %users) {
1504: my ($user,$domain) = split(/:/, $_);
1505: push(@userlist,"$user\@$domain");
1506: my $key=$declutter.'_'.$user.'_'.$domain;
1507: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1508: [$key],
1509: $cdom,$cnum);
1510: my $now=time;
1511: if ($now-$lastnotified{$key}>86400) {
1512: &Apache::lonmsg::user_normal_msg($user,$domain,
1513: "Error [$declutter]",join('<br />',@_));
1514: &Apache::lonnet::put('nohist_xmlerrornotifications',
1515: {$key => $now},
1516: $cdom,$cnum);
1517: }
1518: }
1519: if ($env{'request.role.adv'}) {
1520: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1521: } else {
1522: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1523: }
1524: }
1525: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1526: }
1527: }
1528:
1529: sub warning {
1530: $warningcount++;
1531:
1532: if ($env{'form.grade_target'} ne 'tex') {
1533: if ( &show_error_warn_msg() ) {
1534: push(@Apache::lonxml::warning_messages,
1535: $Apache::lonxml::warnings_error_header.
1536: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1537: $Apache::lonxml::warnings_error_header='';
1538: }
1539: }
1540: }
1541:
1542: sub info {
1543: if ($env{'form.grade_target'} ne 'tex'
1544: && $env{'request.state'} eq 'construct') {
1545: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1546: }
1547: }
1548:
1549: sub message_location {
1550: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1551: }
1552:
1553: sub add_messages {
1554: my ($msg)=@_;
1555: my $result=join(' ',
1556: @Apache::lonxml::info_messages,
1557: @Apache::lonxml::error_messages,
1558: @Apache::lonxml::warning_messages);
1559: undef(@Apache::lonxml::info_messages);
1560: undef(@Apache::lonxml::error_messages);
1561: undef(@Apache::lonxml::warning_messages);
1562: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1563: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1564: }
1565:
1566: sub get_param {
1567: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1568: if ( ! $context ) { $context = -1; }
1569: my $args ='';
1570: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1571: if ( ! $Apache::lonxml::usestyle ) {
1572: $args=$Apache::lonxml::style_values.$args;
1573: }
1574: if ( ! $args ) { return undef; }
1575: if ( $case_insensitive ) {
1576: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1577: return &Apache::run::run("{$args;".'return $'.$param.'}',
1578: $safeeval); #'
1579: } else {
1580: return undef;
1581: }
1582: } else {
1583: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1584: return &Apache::run::run("{$args;".'return $'.$param.'}',
1585: $safeeval); #'
1586: } else {
1587: return undef;
1588: }
1589: }
1590: }
1591:
1592: sub get_param_var {
1593: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1594: if ( ! $context ) { $context = -1; }
1595: my $args ='';
1596: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1597: if ( ! $Apache::lonxml::usestyle ) {
1598: $args=$Apache::lonxml::style_values.$args;
1599: }
1600: &Apache::lonxml::debug("Args are $args param is $param");
1601: if ($case_insensitive) {
1602: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1603: return undef;
1604: }
1605: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1606: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1607: &Apache::lonxml::debug("first run is $value");
1608: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1609: &Apache::lonxml::debug("doing second");
1610: my @result=&Apache::run::run("return $value",$safeeval,1);
1611: if (!defined($result[0])) {
1612: return $value
1613: } else {
1614: if (wantarray) { return @result; } else { return $result[0]; }
1615: }
1616: } else {
1617: return $value;
1618: }
1619: }
1620:
1621: sub register_insert {
1622: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1623: my $i;
1624: my $tagnum=0;
1625: my @order;
1626: for ($i=0;$i < $#data; $i++) {
1627: my $line = $data[$i];
1628: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1629: if ( $line =~ /TABLE/ ) { last; }
1630: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1631: if ($tag) {
1632: $insertlist{"$tagnum.tag"} = $tag;
1633: $insertlist{"$tagnum.description"} = $descrip;
1634: $insertlist{"$tagnum.color"} = $color;
1635: $insertlist{"$tagnum.function"} = $function;
1636: if (!defined($show)) { $show='yes'; }
1637: $insertlist{"$tagnum.show"}= $show;
1638: $insertlist{"$tagnum.helpfile"} = $helpfile;
1639: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1640: $insertlist{"$tag.num"}=$tagnum;
1641: $tagnum++;
1642: }
1643: }
1644: $i++; #skipping TABLE line
1645: $tagnum = 0;
1646: for (;$i < $#data;$i++) {
1647: my $line = $data[$i];
1648: my ($mnemonic,@which) = split(/ +/,$line);
1649: my $tag = $insertlist{"$tagnum.tag"};
1650: for (my $j=0;$j <=$#which;$j++) {
1651: if ( $which[$j] eq 'Y' ) {
1652: if ($insertlist{"$j.show"} ne 'no') {
1653: push(@{ $insertlist{"$tag.which"} },$j);
1654: }
1655: }
1656: }
1657: $tagnum++;
1658: }
1659: }
1660:
1661: sub description {
1662: my ($token)=@_;
1663: my $tagnum;
1664: my $tag=$token->[1];
1665: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1666: my $testtag=$namespace.'::'.$tag;
1667: $tagnum=$insertlist{"$testtag.num"};
1668: if (defined($tagnum)) { last; }
1669: }
1670: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1671: return $insertlist{$tagnum.'.description'};
1672: }
1673:
1674: # Returns a list containing the help file, and the description
1675: sub helpinfo {
1676: my ($token)=@_;
1677: my $tagnum;
1678: my $tag=$token->[1];
1679: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1680: my $testtag=$namespace.'::'.$tag;
1681: $tagnum=$insertlist{"$testtag.num"};
1682: if (defined($tagnum)) { last; }
1683: }
1684: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1685: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1686: }
1687:
1688: # ----------------------------------------------------------------- whichuser
1689: # returns a list of $symb, $courseid, $domain, $name that is correct for
1690: # calls to lonnet functions for this setup.
1691: # - looks for form.grade_ parameters
1692: sub whichuser {
1693: my ($passedsymb)=@_;
1694: my ($symb,$courseid,$domain,$name,$publicuser);
1695: if (defined($env{'form.grade_symb'})) {
1696: my ($tmp_courseid)=
1697: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1698: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1699: if (!$allowed &&
1700: exists($env{'request.course.sec'}) &&
1701: $env{'request.course.sec'} !~ /^\s*$/) {
1702: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1703: '/'.$env{'request.course.sec'});
1704: }
1705: if ($allowed) {
1706: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1707: $courseid=$tmp_courseid;
1708: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1709: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1710: return ($symb,$courseid,$domain,$name,$publicuser);
1711: }
1712: }
1713: if (!$passedsymb) {
1714: $symb=&Apache::lonnet::symbread();
1715: } else {
1716: $symb=$passedsymb;
1717: }
1718: $courseid=$env{'request.course.id'};
1719: $domain=$env{'user.domain'};
1720: $name=$env{'user.name'};
1721: if ($name eq 'public' && $domain eq 'public') {
1722: if (!defined($env{'form.username'})) {
1723: $env{'form.username'}.=time.rand(10000000);
1724: }
1725: $name.=$env{'form.username'};
1726: }
1727: return ($symb,$courseid,$domain,$name,$publicuser);
1728: }
1729:
1730: 1;
1731: __END__
1732:
1733:
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