Annotation of loncom/interface/loncommon.pm, revision 1.81
1.10 albertel 1: # The LearningOnline Network with CAPA
1.1 albertel 2: # a pile of common routines
1.10 albertel 3: #
1.81 ! albertel 4: # $Id: loncommon.pm,v 1.80 2003/02/13 21:35:50 albertel Exp $
1.10 albertel 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: #
1.12 harris41 28: # YEAR=2001
29: # 2/13-12/7 Guy Albertelli
1.18 www 30: # 12/21 Gerd Kortemeyer
1.22 www 31: # 12/25,12/28 Gerd Kortemeyer
1.23 www 32: # YEAR=2002
33: # 1/4 Gerd Kortemeyer
1.43 ng 34: # 6/24,7/2 H. K. Ng
1.1 albertel 35:
36: # Makes a table out of the previous attempts
1.2 albertel 37: # Inputs result_from_symbread, user, domain, course_id
1.16 harris41 38: # Reads in non-network-related .tab files
1.1 albertel 39:
1.35 matthew 40: # POD header:
41:
1.45 matthew 42: =pod
43:
1.35 matthew 44: =head1 NAME
45:
46: Apache::loncommon - pile of common routines
47:
48: =head1 SYNOPSIS
49:
50: Referenced by other mod_perl Apache modules.
51:
52: Invocation:
53: &Apache::loncommon::SUBROUTINENAME(ARGUMENTS);
54:
55: =head1 INTRODUCTION
56:
57: Common collection of used subroutines. This collection helps remove
58: redundancy from other modules and increase efficiency of memory usage.
59:
60: Current things done:
61:
62: Makes a table out of the previous homework attempts
63: Inputs result_from_symbread, user, domain, course_id
64: Reads in non-network-related .tab files
65:
66: This is part of the LearningOnline Network with CAPA project
67: described at http://www.lon-capa.org.
68:
1.41 ng 69: =head2 General Subroutines
1.35 matthew 70:
71: =over 4
72:
73: =cut
74:
75: # End of POD header
1.1 albertel 76: package Apache::loncommon;
77:
78: use strict;
1.22 www 79: use Apache::lonnet();
1.46 matthew 80: use GDBM_File;
1.51 www 81: use POSIX qw(strftime mktime);
1.1 albertel 82: use Apache::Constants qw(:common);
83: use Apache::lonmsg();
1.22 www 84: my $readit;
85:
1.46 matthew 86: =pod
87:
88: =item Global Variables
89:
90: =over 4
91:
92: =cut
1.20 www 93: # ----------------------------------------------- Filetypes/Languages/Copyright
1.12 harris41 94: my %language;
95: my %cprtag;
96: my %fe; my %fd;
1.41 ng 97: my %category_extensions;
1.12 harris41 98:
1.63 www 99: # ---------------------------------------------- Designs
100:
101: my %designhash;
102:
1.46 matthew 103: # ---------------------------------------------- Thesaurus variables
104:
105: =pod
106:
107: =item %Keywords
108:
109: A hash used by &keyword to determine if a word is considered a keyword.
110:
111: =item $thesaurus_db_file
112:
113: Scalar containing the full path to the thesaurus database.
114:
115: =cut
116:
117: my %Keywords;
118: my $thesaurus_db_file;
119:
120:
121: =pod
122:
123: =back
124:
125: =cut
1.20 www 126:
1.12 harris41 127: # ----------------------------------------------------------------------- BEGIN
1.41 ng 128:
129: =pod
130:
1.35 matthew 131: =item BEGIN()
132:
133: Initialize values from language.tab, copyright.tab, filetypes.tab,
1.45 matthew 134: thesaurus.tab, and filecategories.tab.
1.35 matthew 135:
136: =cut
1.45 matthew 137:
1.35 matthew 138: # ----------------------------------------------------------------------- BEGIN
139:
1.18 www 140: BEGIN {
1.46 matthew 141: # Variable initialization
142: $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
143: #
1.22 www 144: unless ($readit) {
1.12 harris41 145: # ------------------------------------------------------------------- languages
146: {
147: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
148: '/language.tab');
1.16 harris41 149: if ($fh) {
150: while (<$fh>) {
151: next if /^\#/;
152: chomp;
153: my ($key,$val)=(split(/\s+/,$_,2));
154: $language{$key}=$val;
155: }
1.12 harris41 156: }
157: }
158: # ------------------------------------------------------------------ copyrights
159: {
1.16 harris41 160: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
161: '/copyright.tab');
162: if ($fh) {
163: while (<$fh>) {
164: next if /^\#/;
165: chomp;
166: my ($key,$val)=(split(/\s+/,$_,2));
167: $cprtag{$key}=$val;
168: }
1.12 harris41 169: }
170: }
1.63 www 171:
172: # -------------------------------------------------------------- domain designs
173:
174: my $filename;
175: my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
176: opendir(DIR,$designdir);
177: while ($filename=readdir(DIR)) {
178: my ($domain)=($filename=~/^(\w+)\./);
179: {
180: my $fh=Apache::File->new($designdir.'/'.$filename);
181: if ($fh) {
182: while (<$fh>) {
183: next if /^\#/;
184: chomp;
185: my ($key,$val)=(split(/\=/,$_));
186: if ($val) { $designhash{$domain.'.'.$key}=$val; }
187: }
188: }
189: }
190:
191: }
192: closedir(DIR);
193:
194:
1.15 harris41 195: # ------------------------------------------------------------- file categories
196: {
197: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
1.16 harris41 198: '/filecategories.tab');
199: if ($fh) {
200: while (<$fh>) {
201: next if /^\#/;
202: chomp;
1.41 ng 203: my ($extension,$category)=(split(/\s+/,$_,2));
204: push @{$category_extensions{lc($category)}},$extension;
1.16 harris41 205: }
1.15 harris41 206: }
207: }
1.12 harris41 208: # ------------------------------------------------------------------ file types
209: {
1.16 harris41 210: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
211: '/filetypes.tab');
212: if ($fh) {
213: while (<$fh>) {
214: next if (/^\#/);
215: chomp;
216: my ($ending,$emb,$descr)=split(/\s+/,$_,3);
217: if ($descr ne '') {
218: $fe{$ending}=lc($emb);
219: $fd{$ending}=$descr;
220: }
1.12 harris41 221: }
222: }
223: }
1.22 www 224: &Apache::lonnet::logthis(
1.46 matthew 225: "<font color=yellow>INFO: Read file types</font>");
1.22 www 226: $readit=1;
1.46 matthew 227: } # end of unless($readit)
1.32 matthew 228:
229: }
230: # ============================================================= END BEGIN BLOCK
1.42 matthew 231: ###############################################################
232: ## HTML and Javascript Helper Functions ##
233: ###############################################################
234:
235: =pod
236:
237: =item browser_and_searcher_javascript
238:
239: Returns scalar containing javascript to open a browser window
240: or a searcher window. Also creates
241:
242: =over 4
243:
244: =item openbrowser(formname,elementname,only,omit) [javascript]
245:
246: inputs: formname, elementname, only, omit
247:
248: formname and elementname indicate the name of the html form and name of
249: the element that the results of the browsing selection are to be placed in.
250:
251: Specifying 'only' will restrict the browser to displaying only files
252: with the given extension. Can be a comma seperated list.
253:
254: Specifying 'omit' will restrict the browser to NOT displaying files
255: with the given extension. Can be a comma seperated list.
256:
257: =item opensearcher(formname, elementname) [javascript]
258:
259: Inputs: formname, elementname
260:
261: formname and elementname specify the name of the html form and the name
262: of the element the selection from the search results will be placed in.
263:
264: =back
265:
266: =cut
267:
268: ###############################################################
269: sub browser_and_searcher_javascript {
270: return <<END;
1.50 matthew 271: var editbrowser = null;
1.42 matthew 272: function openbrowser(formname,elementname,only,omit) {
273: var url = '/res/?';
274: if (editbrowser == null) {
275: url += 'launch=1&';
276: }
277: url += 'catalogmode=interactive&';
278: url += 'mode=edit&';
279: url += 'form=' + formname + '&';
280: if (only != null) {
281: url += 'only=' + only + '&';
282: }
283: if (omit != null) {
284: url += 'omit=' + omit + '&';
285: }
286: url += 'element=' + elementname + '';
287: var title = 'Browser';
288: var options = 'scrollbars=1,resizable=1,menubar=0';
289: options += ',width=700,height=600';
290: editbrowser = open(url,title,options,'1');
291: editbrowser.focus();
292: }
293: var editsearcher;
294: function opensearcher(formname,elementname) {
295: var url = '/adm/searchcat?';
296: if (editsearcher == null) {
297: url += 'launch=1&';
298: }
299: url += 'catalogmode=interactive&';
300: url += 'mode=edit&';
301: url += 'form=' + formname + '&';
302: url += 'element=' + elementname + '';
303: var title = 'Search';
304: var options = 'scrollbars=1,resizable=1,menubar=0';
305: options += ',width=700,height=600';
306: editsearcher = open(url,title,options,'1');
307: editsearcher.focus();
308: }
309: END
310: }
311:
1.74 www 312: sub studentbrowser_javascript {
313: unless ($ENV{'request.course.id'}) { return ''; }
314: unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
315: return '';
316: }
317: return (<<'ENDSTDBRW');
318: <script type="text/javascript" language="Javascript" >
319: var stdeditbrowser;
320: function openstdbrowser(formname,uname,udom) {
321: var url = '/adm/pickstudent?';
322: var filter;
323: eval('filter=document.'+formname+'.'+uname+'.value;');
324: if (filter != null) {
325: if (filter != '') {
326: url += 'filter='+filter+'&';
327: }
328: }
329: url += 'form=' + formname + '&unameelement='+uname+
330: '&udomelement='+udom;
331: var title = 'Student Browser';
332: var options = 'scrollbars=1,resizable=1,menubar=0';
333: options += ',width=700,height=600';
334: stdeditbrowser = open(url,title,options,'1');
335: stdeditbrowser.focus();
336: }
337: </script>
338: ENDSTDBRW
339: }
1.42 matthew 340:
1.74 www 341: sub selectstudent_link {
342: my ($form,$unameele,$udomele)=@_;
343: unless ($ENV{'request.course.id'}) { return ''; }
344: unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
345: return '';
346: }
347: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
348: '","'.$udomele.'");'."'>Select</a>";
349: }
1.42 matthew 350:
351: ###############################################################
352:
353: =pod
1.36 matthew 354:
355: =item linked_select_forms(...)
356:
357: linked_select_forms returns a string containing a <script></script> block
358: and html for two <select> menus. The select menus will be linked in that
359: changing the value of the first menu will result in new values being placed
360: in the second menu. The values in the select menu will appear in alphabetical
361: order.
362:
363: linked_select_forms takes the following ordered inputs:
364:
365: =over 4
366:
367: =item $formname, the name of the <form> tag
368:
369: =item $middletext, the text which appears between the <select> tags
370:
371: =item $firstdefault, the default value for the first menu
372:
373: =item $firstselectname, the name of the first <select> tag
374:
375: =item $secondselectname, the name of the second <select> tag
376:
377: =item $hashref, a reference to a hash containing the data for the menus.
378:
1.41 ng 379: =back
380:
1.36 matthew 381: Below is an example of such a hash. Only the 'text', 'default', and
382: 'select2' keys must appear as stated. keys(%menu) are the possible
383: values for the first select menu. The text that coincides with the
1.41 ng 384: first menu value is given in $menu{$choice1}->{'text'}. The values
1.36 matthew 385: and text for the second menu are given in the hash pointed to by
386: $menu{$choice1}->{'select2'}.
387:
1.41 ng 388: my %menu = ( A1 => { text =>"Choice A1" ,
1.36 matthew 389: default => "B3",
390: select2 => {
391: B1 => "Choice B1",
392: B2 => "Choice B2",
393: B3 => "Choice B3",
394: B4 => "Choice B4"
395: }
396: },
397: A2 => { text =>"Choice A2" ,
398: default => "C2",
399: select2 => {
400: C1 => "Choice C1",
401: C2 => "Choice C2",
402: C3 => "Choice C3"
403: }
404: },
405: A3 => { text =>"Choice A3" ,
406: default => "D6",
407: select2 => {
408: D1 => "Choice D1",
409: D2 => "Choice D2",
410: D3 => "Choice D3",
411: D4 => "Choice D4",
412: D5 => "Choice D5",
413: D6 => "Choice D6",
414: D7 => "Choice D7"
415: }
416: }
417: );
418:
419: =cut
420:
421: # ------------------------------------------------
422:
423: sub linked_select_forms {
424: my ($formname,
425: $middletext,
426: $firstdefault,
427: $firstselectname,
428: $secondselectname,
429: $hashref
430: ) = @_;
431: my $second = "document.$formname.$secondselectname";
432: my $first = "document.$formname.$firstselectname";
433: # output the javascript to do the changing
434: my $result = '';
435: $result.="<script>\n";
436: $result.="var select2data = new Object();\n";
437: $" = '","';
438: my $debug = '';
439: foreach my $s1 (sort(keys(%$hashref))) {
440: $result.="select2data.d_$s1 = new Object();\n";
441: $result.="select2data.d_$s1.def = new String('".
442: $hashref->{$s1}->{'default'}."');\n";
443: $result.="select2data.d_$s1.values = new Array(";
444: my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
445: $result.="\"@s2values\");\n";
446: $result.="select2data.d_$s1.texts = new Array(";
447: my @s2texts;
448: foreach my $value (@s2values) {
449: push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
450: }
451: $result.="\"@s2texts\");\n";
452: }
453: $"=' ';
454: $result.= <<"END";
455:
456: function select1_changed() {
457: // Determine new choice
458: var newvalue = "d_" + $first.value;
459: // update select2
460: var values = select2data[newvalue].values;
461: var texts = select2data[newvalue].texts;
462: var select2def = select2data[newvalue].def;
463: var i;
464: // out with the old
465: for (i = 0; i < $second.options.length; i++) {
466: $second.options[i] = null;
467: }
468: // in with the nuclear
469: for (i=0;i<values.length; i++) {
470: $second.options[i] = new Option(values[i]);
471: $second.options[i].text = texts[i];
472: if (values[i] == select2def) {
473: $second.options[i].selected = true;
474: }
475: }
476: }
477: </script>
478: END
479: # output the initial values for the selection lists
480: $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
481: foreach my $value (sort(keys(%$hashref))) {
482: $result.=" <option value=\"$value\" ";
483: $result.=" selected=\"true\" " if ($value eq $firstdefault);
484: $result.=">$hashref->{$value}->{'text'}</option>\n";
485: }
486: $result .= "</select>\n";
487: my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
488: $result .= $middletext;
489: $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
490: my $seconddefault = $hashref->{$firstdefault}->{'default'};
491: foreach my $value (sort(keys(%select2))) {
492: $result.=" <option value=\"$value\" ";
493: $result.=" selected=\"true\" " if ($value eq $seconddefault);
494: $result.=">$select2{$value}</option>\n";
495: }
496: $result .= "</select>\n";
497: # return $debug;
498: return $result;
499: } # end of sub linked_select_forms {
500:
1.33 matthew 501: ###############################################################
1.44 bowersj2 502:
1.45 matthew 503: =pod
1.44 bowersj2 504:
1.48 bowersj2 505: =item help_open_topic($topic, $text, $stayOnPage, $width, $height)
1.44 bowersj2 506:
507: Returns a string corresponding to an HTML link to the given help $topic, where $topic corresponds to the name of a .tex file in /home/httpd/html/adm/help/tex, with underscores replaced by spaces.
508:
1.48 bowersj2 509: $text will optionally be linked to the same topic, allowing you to link text in addition to the graphic. If you do not want to link text, but wish to specify one of the later parameters, pass an empty string.
510:
1.44 bowersj2 511: $stayOnPage is a value that will be interpreted as a boolean. If true, the link will not open a new window. If false, the link will open a new window using Javascript. (Default is false.)
512:
513: $width and $height are optional numerical parameters that will override the width and height of the popped up window, which may be useful for certain help topics with big pictures included.
514:
515: =cut
516:
517: sub help_open_topic {
1.48 bowersj2 518: my ($topic, $text, $stayOnPage, $width, $height) = @_;
519: $text = "" if (not defined $text);
1.44 bowersj2 520: $stayOnPage = 0 if (not defined $stayOnPage);
1.79 www 521: if ($ENV{'browser.interface'} eq 'textual') {
522: $stayOnPage=1;
523: }
1.44 bowersj2 524: $width = 350 if (not defined $width);
525: $height = 400 if (not defined $height);
526: my $filename = $topic;
527: $filename =~ s/ /_/g;
528:
1.48 bowersj2 529: my $template = "";
530: my $link;
1.44 bowersj2 531:
532: if (!$stayOnPage)
533: {
1.72 bowersj2 534: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
1.44 bowersj2 535: }
536: else
537: {
1.48 bowersj2 538: $link = "/adm/help/${filename}.hlp";
539: }
540:
541: # Add the text
542: if ($text ne "")
543: {
1.77 www 544: $template .=
545: "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
1.78 www 546: "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
1.48 bowersj2 547: }
548:
549: # Add the graphic
550: $template .= <<"ENDTEMPLATE";
1.77 www 551: <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
1.44 bowersj2 552: ENDTEMPLATE
1.78 www 553: if ($text ne '') { $template.='</td></tr></table>' };
1.44 bowersj2 554: return $template;
555:
556: }
1.37 matthew 557:
1.45 matthew 558: =pod
559:
1.37 matthew 560: =item csv_translate($text)
561:
562: Translate $text to allow it to be output as a 'comma seperated values'
563: format.
564:
565: =cut
566:
567: sub csv_translate {
568: my $text = shift;
569: $text =~ s/\"/\"\"/g;
570: $text =~ s/\n//g;
571: return $text;
572: }
573:
574: ###############################################################
1.33 matthew 575: ## Home server <option> list generating code ##
576: ###############################################################
1.35 matthew 577: #-------------------------------------------
578:
1.45 matthew 579: =pod
580:
1.35 matthew 581: =item get_domains()
582:
583: Returns an array containing each of the domains listed in the hosts.tab
584: file.
585:
586: =cut
587:
588: #-------------------------------------------
1.34 matthew 589: sub get_domains {
590: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
591: my @domains;
592: my %seen;
593: foreach (sort values(%Apache::lonnet::hostdom)) {
594: push (@domains,$_) unless $seen{$_}++;
595: }
596: return @domains;
597: }
598:
1.35 matthew 599: #-------------------------------------------
600:
1.45 matthew 601: =pod
602:
1.35 matthew 603: =item select_dom_form($defdom,$name)
604:
605: Returns a string containing a <select name='$name' size='1'> form to
606: allow a user to select the domain to preform an operation in.
607: See loncreateuser.pm for an example invocation and use.
608:
609: =cut
610:
611: #-------------------------------------------
1.34 matthew 612: sub select_dom_form {
613: my ($defdom,$name) = @_;
614: my @domains = get_domains();
615: my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
616: foreach (@domains) {
617: $selectdomain.="<option value=\"$_\" ".
618: ($_ eq $defdom ? 'selected' : '').
619: ">$_</option>\n";
620: }
621: $selectdomain.="</select>";
622: return $selectdomain;
623: }
624:
1.35 matthew 625: #-------------------------------------------
626:
1.45 matthew 627: =pod
628:
1.52 matthew 629: =item get_library_servers($domain)
1.35 matthew 630:
631: Returns a hash which contains keys like '103l3' and values like
632: 'kirk.lite.msu.edu'. All of the keys will be for machines in the
633: given $domain.
634:
635: =cut
636:
637: #-------------------------------------------
1.52 matthew 638: sub get_library_servers {
1.33 matthew 639: my $domain = shift;
1.52 matthew 640: my %library_servers;
1.33 matthew 641: foreach (keys(%Apache::lonnet::libserv)) {
642: if ($Apache::lonnet::hostdom{$_} eq $domain) {
1.52 matthew 643: $library_servers{$_} = $Apache::lonnet::hostname{$_};
1.33 matthew 644: }
645: }
1.52 matthew 646: return %library_servers;
1.33 matthew 647: }
648:
1.35 matthew 649: #-------------------------------------------
650:
1.45 matthew 651: =pod
652:
1.35 matthew 653: =item home_server_option_list($domain)
654:
655: returns a string which contains an <option> list to be used in a
656: <select> form input. See loncreateuser.pm for an example.
657:
658: =cut
659:
660: #-------------------------------------------
1.33 matthew 661: sub home_server_option_list {
662: my $domain = shift;
1.52 matthew 663: my %servers = &get_library_servers($domain);
1.33 matthew 664: my $result = '';
665: foreach (sort keys(%servers)) {
666: $result.=
667: '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
668: }
669: return $result;
670: }
671: ###############################################################
672: ## End of home server <option> list generating code ##
673: ###############################################################
1.32 matthew 674:
675: ###############################################################
676: ## Authentication changing form generation subroutines ##
677: ###############################################################
678: ##
679: ## All of the authform_xxxxxxx subroutines take their inputs in a
680: ## hash, and have reasonable default values.
681: ##
682: ## formname = the name given in the <form> tag.
1.35 matthew 683: #-------------------------------------------
684:
1.45 matthew 685: =pod
686:
1.35 matthew 687: =item authform_xxxxxx
688:
689: The authform_xxxxxx subroutines provide javascript and html forms which
690: handle some of the conveniences required for authentication forms.
691: This is not an optimal method, but it works.
692:
693: See loncreateuser.pm for invocation and use examples.
694:
695: =over 4
696:
697: =item authform_header
698:
699: =item authform_authorwarning
700:
701: =item authform_nochange
702:
703: =item authform_kerberos
704:
705: =item authform_internal
706:
707: =item authform_filesystem
708:
709: =back
710:
711: =cut
712:
713: #-------------------------------------------
1.32 matthew 714: sub authform_header{
715: my %in = (
716: formname => 'cu',
1.80 albertel 717: kerb_def_dom => '',
1.32 matthew 718: @_,
719: );
720: $in{'formname'} = 'document.' . $in{'formname'};
721: my $result='';
1.80 albertel 722:
723: #---------------------------------------------- Code for upper case translation
724: my $Javascript_toUpperCase;
725: unless ($in{kerb_def_dom}) {
726: $Javascript_toUpperCase =<<"END";
727: switch (choice) {
728: case 'krb': currentform.elements[choicearg].value =
729: currentform.elements[choicearg].value.toUpperCase();
730: break;
731: default:
732: }
733: END
734: } else {
735: $Javascript_toUpperCase = "";
736: }
737:
1.32 matthew 738: $result.=<<"END";
739: var current = new Object();
740: current.radiovalue = 'nochange';
741: current.argfield = null;
742:
743: function changed_radio(choice,currentform) {
744: var choicearg = choice + 'arg';
745: // If a radio button in changed, we need to change the argfield
746: if (current.radiovalue != choice) {
747: current.radiovalue = choice;
748: if (current.argfield != null) {
749: currentform.elements[current.argfield].value = '';
750: }
751: if (choice == 'nochange') {
752: current.argfield = null;
753: } else {
754: current.argfield = choicearg;
755: switch(choice) {
756: case 'krb':
757: currentform.elements[current.argfield].value =
758: "$in{'kerb_def_dom'}";
759: break;
760: default:
761: break;
762: }
763: }
764: }
765: return;
766: }
1.22 www 767:
1.32 matthew 768: function changed_text(choice,currentform) {
769: var choicearg = choice + 'arg';
770: if (currentform.elements[choicearg].value !='') {
1.80 albertel 771: $Javascript_toUpperCase
1.32 matthew 772: // clear old field
773: if ((current.argfield != choicearg) && (current.argfield != null)) {
774: currentform.elements[current.argfield].value = '';
775: }
776: current.argfield = choicearg;
777: }
778: set_auth_radio_buttons(choice,currentform);
779: return;
1.20 www 780: }
1.32 matthew 781:
782: function set_auth_radio_buttons(newvalue,currentform) {
783: var i=0;
784: while (i < currentform.login.length) {
785: if (currentform.login[i].value == newvalue) { break; }
786: i++;
787: }
788: if (i == currentform.login.length) {
789: return;
790: }
791: current.radiovalue = newvalue;
792: currentform.login[i].checked = true;
793: return;
794: }
795: END
796: return $result;
797: }
798:
799: sub authform_authorwarning{
800: my $result='';
801: $result=<<"END";
802: <i>As a general rule, only authors or co-authors should be filesystem
803: authenticated (which allows access to the server filesystem).</i>
804: END
805: return $result;
806: }
807:
808: sub authform_nochange{
809: my %in = (
810: formname => 'document.cu',
811: kerb_def_dom => 'MSU.EDU',
812: @_,
813: );
814: my $result='';
815: $result.=<<"END";
816: <input type="radio" name="login" value="nochange" checked="checked"
1.57 albertel 817: onclick="javascript:changed_radio('nochange',$in{'formname'});" />
1.32 matthew 818: Do not change login data
819: END
820: return $result;
821: }
822:
823: sub authform_kerberos{
824: my %in = (
825: formname => 'document.cu',
826: kerb_def_dom => 'MSU.EDU',
1.80 albertel 827: kerb_def_auth => 'krb4',
1.32 matthew 828: @_,
829: );
830: my $result='';
1.80 albertel 831: my $check4;
832: my $check5;
833: if ($in{'kerb_def_auth'} eq 'krb5') {
834: $check5 = " checked=\"on\"";
835: } else {
836: $check4 = " checked=\"on\"";
837: }
1.32 matthew 838: $result.=<<"END";
839: <input type="radio" name="login" value="krb"
840: onclick="javascript:changed_radio('krb',$in{'formname'});"
1.57 albertel 841: onchange="javascript:changed_radio('krb',$in{'formname'});" />
1.32 matthew 842: Kerberos authenticated with domain
1.80 albertel 843: <input type="text" size="10" name="krbarg" value="$in{'kerb_def_dom'}"
1.57 albertel 844: onchange="javascript:changed_text('krb',$in{'formname'});" />
1.80 albertel 845: <input type="radio" name="krbver" value="4" $check4 />Version 4
846: <input type="radio" name="krbver" value="5" $check5 />Version 5
1.32 matthew 847: END
848: return $result;
849: }
850:
851: sub authform_internal{
852: my %args = (
853: formname => 'document.cu',
854: kerb_def_dom => 'MSU.EDU',
855: @_,
856: );
857: my $result='';
858: $result.=<<"END";
859: <input type="radio" name="login" value="int"
860: onchange="javascript:changed_radio('int',$args{'formname'});"
1.57 albertel 861: onclick="javascript:changed_radio('int',$args{'formname'});" />
1.32 matthew 862: Internally authenticated (with initial password
863: <input type="text" size="10" name="intarg" value=""
1.75 www 864: onchange="javascript:changed_text('int',$args{'formname'});" />)
1.32 matthew 865: END
866: return $result;
867: }
868:
869: sub authform_local{
870: my %in = (
871: formname => 'document.cu',
872: kerb_def_dom => 'MSU.EDU',
873: @_,
874: );
875: my $result='';
876: $result.=<<"END";
877: <input type="radio" name="login" value="loc"
878: onchange="javascript:changed_radio('loc',$in{'formname'});"
1.57 albertel 879: onclick="javascript:changed_radio('loc',$in{'formname'});" />
1.32 matthew 880: Local Authentication with argument
881: <input type="text" size="10" name="locarg" value=""
1.57 albertel 882: onchange="javascript:changed_text('loc',$in{'formname'});" />
1.32 matthew 883: END
884: return $result;
885: }
886:
887: sub authform_filesystem{
888: my %in = (
889: formname => 'document.cu',
890: kerb_def_dom => 'MSU.EDU',
891: @_,
892: );
893: my $result='';
894: $result.=<<"END";
895: <input type="radio" name="login" value="fsys"
896: onchange="javascript:changed_radio('fsys',$in{'formname'});"
1.57 albertel 897: onclick="javascript:changed_radio('fsys',$in{'formname'});" />
1.32 matthew 898: Filesystem authenticated (with initial password
899: <input type="text" size="10" name="fsysarg" value=""
1.75 www 900: onchange="javascript:changed_text('fsys',$in{'formname'});">)
1.32 matthew 901: END
902: return $result;
903: }
904:
905: ###############################################################
906: ## End Authentication changing form generation functions ##
1.80 albertel 907: ###############################################################
908:
909: ###############################################################
910: ## Get Authentication Defaults for Domain ##
911: ###############################################################
912: ##
913: ## Returns default authentication type and an associated argument
914: ## as listed in file domain.tab
915: ##
916: #-------------------------------------------
917:
918: =pod
919:
920: =item get_auth_defaults
921:
922: get_auth_defaults($target_domain) returns the default authentication
923: type and an associated argument (initial password or a kerberos domain).
924: These values are stored in lonTabs/domain.tab
925:
926: ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
927:
928: If target_domain is not found in domain.tab, returns nothing ('').
929:
930: =over 4
931:
932: =item get_auth_defaults
933:
934: =back
935:
936: =cut
937:
938: #-------------------------------------------
939: sub get_auth_defaults {
940: my $domain=shift;
941: return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
942: }
943: ###############################################################
944: ## End Get Authentication Defaults for Domain ##
945: ###############################################################
946:
947: ###############################################################
948: ## Get Kerberos Defaults for Domain ##
949: ###############################################################
950: ##
951: ## Returns default kerberos version and an associated argument
952: ## as listed in file domain.tab. If not listed, provides
953: ## appropriate default domain and kerberos version.
954: ##
955: #-------------------------------------------
956:
957: =pod
958:
959: =item get_kerberos_defaults
960:
961: get_kerberos_defaults($target_domain) returns the default kerberos
962: version and domain. If not found in domain.tabs, it defaults to
963: version 4 and the domain of the server.
964:
965: ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
966:
967: =over 4
968:
969: =item get_kerberos_defaults
970:
971: =back
972:
973: =cut
974:
975: #-------------------------------------------
976: sub get_kerberos_defaults {
977: my $domain=shift;
978: my ($krbdef,$krbdefdom) =
979: &Apache::loncommon::get_auth_defaults($domain);
980: unless ($krbdef =~/^krb/ && $krbdefdom) {
981: $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
982: my $krbdefdom=$1;
983: $krbdefdom=~tr/a-z/A-Z/;
984: $krbdef = "krb4";
985: }
986: return ($krbdef,$krbdefdom);
987: }
988: ###############################################################
989: ## End Get Kerberos Defaults for Domain ##
1.32 matthew 990: ###############################################################
991:
1.46 matthew 992: ###############################################################
993: ## Thesaurus Functions ##
994: ###############################################################
1.20 www 995:
1.46 matthew 996: =pod
1.20 www 997:
1.46 matthew 998: =item initialize_keywords
999:
1000: Initializes the package variable %Keywords if it is empty. Uses the
1001: package variable $thesaurus_db_file.
1002:
1003: =cut
1004:
1005: ###################################################
1006:
1007: sub initialize_keywords {
1008: return 1 if (scalar keys(%Keywords));
1009: # If we are here, %Keywords is empty, so fill it up
1010: # Make sure the file we need exists...
1011: if (! -e $thesaurus_db_file) {
1012: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
1013: " failed because it does not exist");
1014: return 0;
1015: }
1016: # Set up the hash as a database
1017: my %thesaurus_db;
1018: if (! tie(%thesaurus_db,'GDBM_File',
1.53 albertel 1019: $thesaurus_db_file,&GDBM_READER(),0640)){
1.46 matthew 1020: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
1021: $thesaurus_db_file);
1022: return 0;
1023: }
1024: # Get the average number of appearances of a word.
1025: my $avecount = $thesaurus_db{'average.count'};
1026: # Put keywords (those that appear > average) into %Keywords
1027: while (my ($word,$data)=each (%thesaurus_db)) {
1028: my ($count,undef) = split /:/,$data;
1029: $Keywords{$word}++ if ($count > $avecount);
1030: }
1031: untie %thesaurus_db;
1032: # Remove special values from %Keywords.
1033: foreach ('total.count','average.count') {
1034: delete($Keywords{$_}) if (exists($Keywords{$_}));
1035: }
1036: return 1;
1037: }
1038:
1039: ###################################################
1040:
1041: =pod
1042:
1043: =item keyword($word)
1044:
1045: Returns true if $word is a keyword. A keyword is a word that appears more
1046: than the average number of times in the thesaurus database. Calls
1047: &initialize_keywords
1048:
1049: =cut
1050:
1051: ###################################################
1.20 www 1052:
1053: sub keyword {
1.46 matthew 1054: return if (!&initialize_keywords());
1055: my $word=lc(shift());
1056: $word=~s/\W//g;
1057: return exists($Keywords{$word});
1.20 www 1058: }
1.46 matthew 1059:
1060: ###############################################################
1061:
1062: =pod
1.20 www 1063:
1.46 matthew 1064: =item get_related_words
1065:
1066: Look up a word in the thesaurus. Takes a scalar arguement and returns
1067: an array of words. If the keyword is not in the thesaurus, an empty array
1068: will be returned. The order of the words returned is determined by the
1069: database which holds them.
1070:
1071: Uses global $thesaurus_db_file.
1072:
1073: =cut
1074:
1075: ###############################################################
1076: sub get_related_words {
1077: my $keyword = shift;
1078: my %thesaurus_db;
1079: if (! -e $thesaurus_db_file) {
1080: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
1081: "failed because the file does not exist");
1082: return ();
1083: }
1084: if (! tie(%thesaurus_db,'GDBM_File',
1.53 albertel 1085: $thesaurus_db_file,&GDBM_READER(),0640)){
1.46 matthew 1086: return ();
1087: }
1088: my @Words=();
1089: if (exists($thesaurus_db{$keyword})) {
1090: $_ = $thesaurus_db{$keyword};
1091: (undef,@Words) = split/:/; # The first element is the number of times
1092: # the word appears. We do not need it now.
1093: for (my $i=0;$i<=$#Words;$i++) {
1094: ($Words[$i],undef)= split/\,/,$Words[$i];
1.20 www 1095: }
1096: }
1.46 matthew 1097: untie %thesaurus_db;
1098: return @Words;
1.14 harris41 1099: }
1.46 matthew 1100:
1101: ###############################################################
1102: ## End Thesaurus Functions ##
1103: ###############################################################
1.61 www 1104:
1105: # -------------------------------------------------------------- Plaintext name
1.81 ! albertel 1106: =pod
! 1107:
! 1108: =item plainname($uname,$udom)
! 1109:
! 1110: Gets a users name and returns it as a string in
! 1111: "first middle last generation"
! 1112: form
! 1113:
! 1114: =cut
1.61 www 1115:
1.81 ! albertel 1116: ###############################################################
1.61 www 1117: sub plainname {
1118: my ($uname,$udom)=@_;
1119: my %names=&Apache::lonnet::get('environment',
1120: ['firstname','middlename','lastname','generation'],
1121: $udom,$uname);
1.62 www 1122: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1.61 www 1123: $names{'lastname'}.' '.$names{'generation'};
1.62 www 1124: $name=~s/\s+$//;
1125: $name=~s/\s+/ /g;
1126: return $name;
1.61 www 1127: }
1.66 www 1128:
1129: # -------------------------------------------------------------------- Nickname
1.81 ! albertel 1130: =pod
! 1131:
! 1132: =item nickname($uname,$udom)
! 1133:
! 1134: Gets a users name and returns it as a string as
! 1135:
! 1136: ""nickname""
1.66 www 1137:
1.81 ! albertel 1138: if the user has a nickname or
! 1139:
! 1140: "first middle last generation"
! 1141:
! 1142: if the user does not
! 1143:
! 1144: =cut
1.66 www 1145:
1146: sub nickname {
1147: my ($uname,$udom)=@_;
1148: my %names=&Apache::lonnet::get('environment',
1149: ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
1.68 albertel 1150: my $name=$names{'nickname'};
1.66 www 1151: if ($name) {
1152: $name='"'.$name.'"';
1153: } else {
1154: $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1155: $names{'lastname'}.' '.$names{'generation'};
1156: $name=~s/\s+$//;
1157: $name=~s/\s+/ /g;
1158: }
1159: return $name;
1160: }
1161:
1.61 www 1162:
1163: # ------------------------------------------------------------------ Screenname
1.81 ! albertel 1164:
! 1165: =pod
! 1166:
! 1167: =item screenname($uname,$udom)
! 1168:
! 1169: Gets a users screenname and returns it as a string
! 1170:
! 1171: =cut
1.61 www 1172:
1173: sub screenname {
1174: my ($uname,$udom)=@_;
1175: my %names=
1176: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1.68 albertel 1177: return $names{'screenname'};
1.62 www 1178: }
1179:
1180: # ------------------------------------------------------------- Message Wrapper
1181:
1182: sub messagewrapper {
1183: my ($link,$un,$do)=@_;
1184: return
1185: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
1.74 www 1186: }
1187: # --------------------------------------------------------------- Notes Wrapper
1188:
1189: sub noteswrapper {
1190: my ($link,$un,$do)=@_;
1191: return
1192: "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
1.62 www 1193: }
1194: # ------------------------------------------------------------- Aboutme Wrapper
1195:
1196: sub aboutmewrapper {
1.69 matthew 1197: my ($link,$username,$domain)=@_;
1198: return "<a href='/adm/$domain/$username/aboutme'>$link</a>";
1.62 www 1199: }
1200:
1201: # ------------------------------------------------------------ Syllabus Wrapper
1202:
1203:
1204: sub syllabuswrapper {
1.73 www 1205: my ($link,$un,$do,$tf)=@_;
1206: if ($tf) { $link='<font color="'.$tf.'">'.$link.'</font>'; }
1.62 www 1207: return "<a href='/public/$do/$un/syllabus'>$link</a>";
1.61 www 1208: }
1.14 harris41 1209:
1210: # ---------------------------------------------------------------- Language IDs
1211: sub languageids {
1.16 harris41 1212: return sort(keys(%language));
1.14 harris41 1213: }
1214:
1215: # -------------------------------------------------------- Language Description
1216: sub languagedescription {
1.16 harris41 1217: return $language{shift(@_)};
1.14 harris41 1218: }
1219:
1220: # --------------------------------------------------------------- Copyright IDs
1221: sub copyrightids {
1.16 harris41 1222: return sort(keys(%cprtag));
1.14 harris41 1223: }
1224:
1225: # ------------------------------------------------------- Copyright Description
1226: sub copyrightdescription {
1.16 harris41 1227: return $cprtag{shift(@_)};
1.14 harris41 1228: }
1229:
1230: # ------------------------------------------------------------- File Categories
1231: sub filecategories {
1.41 ng 1232: return sort(keys(%category_extensions));
1.15 harris41 1233: }
1.14 harris41 1234:
1.17 harris41 1235: # -------------------------------------- File Types within a specified category
1.15 harris41 1236: sub filecategorytypes {
1.41 ng 1237: return @{$category_extensions{lc($_[0])}};
1.14 harris41 1238: }
1239:
1240: # ------------------------------------------------------------------ File Types
1241: sub fileextensions {
1.16 harris41 1242: return sort(keys(%fe));
1.14 harris41 1243: }
1244:
1245: # ------------------------------------------------------------- Embedding Style
1246: sub fileembstyle {
1.16 harris41 1247: return $fe{lc(shift(@_))};
1.14 harris41 1248: }
1249:
1250: # ------------------------------------------------------------ Description Text
1251: sub filedescription {
1.16 harris41 1252: return $fd{lc(shift(@_))};
1253: }
1254:
1255: # ------------------------------------------------------------ Description Text
1256: sub filedescriptionex {
1257: my $ex=shift;
1258: return '.'.$ex.' '.$fd{lc($ex)};
1.12 harris41 1259: }
1.1 albertel 1260:
1.40 ng 1261: # ---- Retrieve attempts by students
1262: # input
1263: # $symb - problem including path
1264: # $username,$domain - that of the student
1265: # $course - course name
1266: # $getattempt - leave blank if want all attempts, else put something.
1.43 ng 1267: # $regexp - regular expression. If string matches regexp send to
1268: # $gradesub - routine that process the string if it matches regexp
1.40 ng 1269: #
1270: # output
1271: # formatted as a table all the attempts, if any.
1272: #
1.1 albertel 1273: sub get_previous_attempt {
1.43 ng 1274: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1.1 albertel 1275: my $prevattempts='';
1.43 ng 1276: no strict 'refs';
1.1 albertel 1277: if ($symb) {
1.3 albertel 1278: my (%returnhash)=
1279: &Apache::lonnet::restore($symb,$course,$domain,$username);
1.1 albertel 1280: if ($returnhash{'version'}) {
1281: my %lasthash=();
1282: my $version;
1283: for ($version=1;$version<=$returnhash{'version'};$version++) {
1.19 harris41 1284: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1.1 albertel 1285: $lasthash{$_}=$returnhash{$version.':'.$_};
1.19 harris41 1286: }
1.1 albertel 1287: }
1.43 ng 1288: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1.40 ng 1289: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1.16 harris41 1290: foreach (sort(keys %lasthash)) {
1.31 albertel 1291: my ($ign,@parts) = split(/\./,$_);
1.41 ng 1292: if ($#parts > 0) {
1.31 albertel 1293: my $data=$parts[-1];
1294: pop(@parts);
1.40 ng 1295: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1.31 albertel 1296: } else {
1.41 ng 1297: if ($#parts == 0) {
1298: $prevattempts.='<th>'.$parts[0].'</th>';
1299: } else {
1300: $prevattempts.='<th>'.$ign.'</th>';
1301: }
1.31 albertel 1302: }
1.16 harris41 1303: }
1.40 ng 1304: if ($getattempt eq '') {
1305: for ($version=1;$version<=$returnhash{'version'};$version++) {
1306: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1307: foreach (sort(keys %lasthash)) {
1308: my $value;
1309: if ($_ =~ /timestamp/) {
1310: $value=scalar(localtime($returnhash{$version.':'.$_}));
1311: } else {
1312: $value=$returnhash{$version.':'.$_};
1313: }
1314: $prevattempts.='<td>'.$value.' </td>';
1315: }
1316: }
1.1 albertel 1317: }
1.40 ng 1318: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1.16 harris41 1319: foreach (sort(keys %lasthash)) {
1.5 albertel 1320: my $value;
1321: if ($_ =~ /timestamp/) {
1322: $value=scalar(localtime($lasthash{$_}));
1323: } else {
1324: $value=$lasthash{$_};
1325: }
1.49 ng 1326: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1.40 ng 1327: $prevattempts.='<td>'.$value.' </td>';
1.16 harris41 1328: }
1.40 ng 1329: $prevattempts.='</tr></table></td></tr></table>';
1.1 albertel 1330: } else {
1331: $prevattempts='Nothing submitted - no attempts.';
1332: }
1333: } else {
1334: $prevattempts='No data.';
1335: }
1.10 albertel 1336: }
1337:
1338: sub get_student_view {
1.64 sakharuk 1339: my ($symb,$username,$domain,$courseid,$target) = @_;
1.10 albertel 1340: my ($map,$id,$feedurl) = split(/___/,$symb);
1341: my (%old,%moreenv);
1342: my @elements=('symb','courseid','domain','username');
1343: foreach my $element (@elements) {
1344: $old{$element}=$ENV{'form.grade_'.$element};
1345: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1346: }
1.64 sakharuk 1347: if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
1.11 albertel 1348: &Apache::lonnet::appenv(%moreenv);
1349: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
1350: &Apache::lonnet::delenv('form.grade_');
1351: foreach my $element (@elements) {
1352: $ENV{'form.grade_'.$element}=$old{$element};
1353: }
1354: $userview=~s/\<body[^\>]*\>//gi;
1355: $userview=~s/\<\/body\>//gi;
1356: $userview=~s/\<html\>//gi;
1357: $userview=~s/\<\/html\>//gi;
1358: $userview=~s/\<head\>//gi;
1359: $userview=~s/\<\/head\>//gi;
1360: $userview=~s/action\s*\=/would_be_action\=/gi;
1361: return $userview;
1362: }
1363:
1364: sub get_student_answers {
1365: my ($symb,$username,$domain,$courseid) = @_;
1366: my ($map,$id,$feedurl) = split(/___/,$symb);
1367: my (%old,%moreenv);
1368: my @elements=('symb','courseid','domain','username');
1369: foreach my $element (@elements) {
1370: $old{$element}=$ENV{'form.grade_'.$element};
1371: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1372: }
1373: $moreenv{'form.grade_target'}='answer';
1.10 albertel 1374: &Apache::lonnet::appenv(%moreenv);
1375: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
1376: &Apache::lonnet::delenv('form.grade_');
1377: foreach my $element (@elements) {
1378: $ENV{'form.grade_'.$element}=$old{$element};
1379: }
1380: return $userview;
1.1 albertel 1381: }
1.37 matthew 1382:
1383: ###############################################
1.51 www 1384:
1385:
1386: sub timehash {
1387: my @ltime=localtime(shift);
1388: return ( 'seconds' => $ltime[0],
1389: 'minutes' => $ltime[1],
1390: 'hours' => $ltime[2],
1391: 'day' => $ltime[3],
1392: 'month' => $ltime[4]+1,
1393: 'year' => $ltime[5]+1900,
1394: 'weekday' => $ltime[6],
1395: 'dayyear' => $ltime[7]+1,
1396: 'dlsav' => $ltime[8] );
1397: }
1398:
1399: sub maketime {
1400: my %th=@_;
1401: return POSIX::mktime(
1402: ($th{'seconds'},$th{'minutes'},$th{'hours'},
1403: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
1404: }
1405:
1.70 www 1406:
1407: #########################################
1408: #
1409: # Retro-fixing of un-backward-compatible time format
1410:
1411: sub unsqltime {
1412: my $timestamp=shift;
1413: if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
1414: $timestamp=&maketime(
1415: 'year'=>$1,'month'=>$2,'day'=>$3,
1416: 'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
1417: }
1418: return $timestamp;
1419: }
1420:
1421: #########################################
1.51 www 1422:
1423: sub findallcourses {
1424: my %courses=();
1425: my $now=time;
1426: foreach (keys %ENV) {
1427: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
1428: my ($starttime,$endtime)=$ENV{$_};
1429: my $active=1;
1430: if ($starttime) {
1431: if ($now<$starttime) { $active=0; }
1432: }
1433: if ($endtime) {
1434: if ($now>$endtime) { $active=0; }
1435: }
1436: if ($active) { $courses{$1.'_'.$2}=1; }
1437: }
1438: }
1439: return keys %courses;
1440: }
1.37 matthew 1441:
1.54 www 1442: ###############################################
1.60 matthew 1443: ###############################################
1444:
1445: =pod
1446:
1.63 www 1447: =item &determinedomain()
1.60 matthew 1448:
1449: Inputs: $domain (usually will be undef)
1450:
1.63 www 1451: Returns: Determines which domain should be used for designs
1.60 matthew 1452:
1453: =cut
1.54 www 1454:
1.60 matthew 1455: ###############################################
1.63 www 1456: sub determinedomain {
1457: my $domain=shift;
1458: if (! $domain) {
1.60 matthew 1459: # Determine domain if we have not been given one
1460: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1461: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
1462: if ($ENV{'request.role.domain'}) {
1463: $domain=$ENV{'request.role.domain'};
1464: }
1465: }
1.63 www 1466: return $domain;
1467: }
1468: ###############################################
1469: =pod
1470:
1471: =item &domainlogo()
1472:
1473: Inputs: $domain (usually will be undef)
1474:
1475: Returns: A link to a domain logo, if the domain logo exists.
1476: If the domain logo does not exist, a description of the domain.
1477:
1478: =cut
1479: ###############################################
1480: sub domainlogo {
1481: my $domain = &determinedomain(shift);
1482: # See if there is a logo
1.59 www 1483: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
1.71 www 1484: return '<img src="http://'.$ENV{'HTTP_HOST'}.':8080/adm/lonDomLogos/'.
1485: $domain.'.gif" />';
1.60 matthew 1486: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
1487: return $Apache::lonnet::domaindescription{$domain};
1.59 www 1488: } else {
1.60 matthew 1489: return '';
1.59 www 1490: }
1491: }
1.63 www 1492: ##############################################
1493:
1494: =pod
1495:
1496: =item &designparm()
1497:
1498: Inputs: $which parameter; $domain (usually will be undef)
1499:
1500: Returns: value of designparamter $which
1501:
1502: =cut
1503: ##############################################
1504: sub designparm {
1505: my ($which,$domain)=@_;
1506: $domain=&determinedomain($domain);
1507: if ($designhash{$domain.'.'.$which}) {
1508: return $designhash{$domain.'.'.$which};
1509: } else {
1510: return $designhash{'default.'.$which};
1511: }
1512: }
1.59 www 1513:
1.60 matthew 1514: ###############################################
1515: ###############################################
1516:
1517: =pod
1518:
1519: =item &bodytag()
1520:
1521: Returns a uniform header for LON-CAPA web pages.
1522:
1523: Inputs:
1524:
1525: $title, A title to be displayed on the page.
1526: $function, the current role (can be undef).
1527: $addentries, extra parameters for the <body> tag.
1528: $bodyonly, if defined, only return the <body> tag.
1529: $domain, if defined, force a given domain.
1530:
1531: Returns: A uniform header for LON-CAPA web pages.
1532: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
1533: If $bodyonly is undef or zero, an html string containing a <body> tag and
1534: other decorations will be returned.
1535:
1536: =cut
1537:
1538: ###############################################
1.63 www 1539:
1540:
1.60 matthew 1541: ###############################################
1.54 www 1542: sub bodytag {
1.60 matthew 1543: my ($title,$function,$addentries,$bodyonly,$domain)=@_;
1.55 www 1544: unless ($function) {
1545: $function='student';
1546: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
1547: $function='coordinator';
1548: }
1549: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
1550: $function='admin';
1551: }
1552: if (($ENV{'request.role'}=~/^(au|ca)/) ||
1553: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
1554: $function='author';
1555: }
1556: }
1.63 www 1557: my $img=&designparm($function.'.img',$domain);
1558: my $pgbg=&designparm($function.'.pgbg',$domain);
1559: my $tabbg=&designparm($function.'.tabbg',$domain);
1560: my $font=&designparm($function.'.font',$domain);
1561: my $link=&designparm($function.'.link',$domain);
1562: my $alink=&designparm($function.'.alink',$domain);
1563: my $vlink=&designparm($function.'.vlink',$domain);
1564: my $sidebg=&designparm($function.'.sidebg',$domain);
1565:
1566: # role and realm
1.55 www 1567: my ($role,$realm)
1568: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
1569: # realm
1.54 www 1570: if ($ENV{'request.course.id'}) {
1.55 www 1571: $realm=
1572: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1.54 www 1573: }
1.55 www 1574: unless ($realm) { $realm=' '; }
1575: # Set messages
1.60 matthew 1576: my $messages=&domainlogo($domain);
1.55 www 1577: # Output
1.60 matthew 1578: my $bodytag = <<END;
1.54 www 1579: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
1580: $addentries>
1.60 matthew 1581: END
1582: if ($bodyonly) {
1583: return $bodytag;
1.79 www 1584: } elsif ($ENV{'browser.interface'} eq 'textual') {
1585: return $bodytag.'<h1>LON-CAPA: '.$title.
1586: '</h1><a href="/adm/menu">Main Menu</a><hr />';
1.60 matthew 1587: } else {
1588: return(<<ENDBODY);
1589: $bodytag
1.55 www 1590: <table width="100%" cellspacing="0" border="0" cellpadding="0">
1591: <tr><td bgcolor="$font">
1.71 www 1592: <img src="http://$ENV{'HTTP_HOST'}:8080/$img" /></td>
1.63 www 1593: <td bgcolor="$font"><font color='$sidebg'>$messages</font></td>
1.55 www 1594: </tr>
1.54 www 1595: <tr>
1.55 www 1596: <td rowspan="3" bgcolor="$tabbg">
1597: <font size="5"><b>$title</b></font>
1.54 www 1598: <td bgcolor="$tabbg" align="right">
1599: <font size="2">
1600: $ENV{'environment.firstname'}
1601: $ENV{'environment.middlename'}
1602: $ENV{'environment.lastname'}
1603: $ENV{'environment.generation'}
1.55 www 1604: </font>
1.54 www 1605: </td>
1606: </tr>
1607: <tr><td bgcolor="$tabbg" align="right">
1.55 www 1608: <font size="2">$role</font>
1.54 www 1609: </td></tr>
1.55 www 1610: <tr>
1611: <td bgcolor="$tabbg" align="right"><font size="2">$realm</font> </td></tr>
1.54 www 1612: </table><br>
1613: ENDBODY
1.60 matthew 1614: }
1.54 www 1615: }
1.37 matthew 1616: ###############################################
1.1 albertel 1617:
1.6 albertel 1618: sub get_unprocessed_cgi {
1.25 albertel 1619: my ($query,$possible_names)= @_;
1.26 matthew 1620: # $Apache::lonxml::debug=1;
1.16 harris41 1621: foreach (split(/&/,$query)) {
1.6 albertel 1622: my ($name, $value) = split(/=/,$_);
1.25 albertel 1623: $name = &Apache::lonnet::unescape($name);
1624: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
1625: $value =~ tr/+/ /;
1626: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1627: &Apache::lonxml::debug("Seting :$name: to :$value:");
1.30 albertel 1628: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
1.25 albertel 1629: }
1.16 harris41 1630: }
1.6 albertel 1631: }
1632:
1.7 albertel 1633: sub cacheheader {
1.23 www 1634: unless ($ENV{'request.method'} eq 'GET') { return ''; }
1.8 albertel 1635: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
1.7 albertel 1636: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
1637: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
1638: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
1639: return $output;
1640: }
1641:
1.9 albertel 1642: sub no_cache {
1643: my ($r) = @_;
1.23 www 1644: unless ($ENV{'request.method'} eq 'GET') { return ''; }
1.24 albertel 1645: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
1.9 albertel 1646: $r->no_cache(1);
1647: $r->header_out("Pragma" => "no-cache");
1.24 albertel 1648: #$r->header_out("Expires" => $date);
1.9 albertel 1649: }
1.25 albertel 1650:
1651: sub add_to_env {
1652: my ($name,$value)=@_;
1.28 albertel 1653: if (defined($ENV{$name})) {
1.27 albertel 1654: if (ref($ENV{$name})) {
1.25 albertel 1655: #already have multiple values
1656: push(@{ $ENV{$name} },$value);
1657: } else {
1658: #first time seeing multiple values, convert hash entry to an arrayref
1659: my $first=$ENV{$name};
1660: undef($ENV{$name});
1661: push(@{ $ENV{$name} },$first,$value);
1662: }
1663: } else {
1664: $ENV{$name}=$value;
1665: }
1.31 albertel 1666: }
1667:
1.41 ng 1668: =pod
1.45 matthew 1669:
1670: =back
1.41 ng 1671:
1672: =head2 CSV Upload/Handling functions
1.38 albertel 1673:
1.41 ng 1674: =over 4
1675:
1676: =item upfile_store($r)
1677:
1678: Store uploaded file, $r should be the HTTP Request object,
1679: needs $ENV{'form.upfile'}
1680: returns $datatoken to be put into hidden field
1681:
1682: =cut
1.31 albertel 1683:
1684: sub upfile_store {
1685: my $r=shift;
1686: $ENV{'form.upfile'}=~s/\r/\n/gs;
1687: $ENV{'form.upfile'}=~s/\f/\n/gs;
1688: $ENV{'form.upfile'}=~s/\n+/\n/gs;
1689: $ENV{'form.upfile'}=~s/\n+$//gs;
1690:
1691: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
1692: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
1693: {
1694: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
1695: '/tmp/'.$datatoken.'.tmp');
1696: print $fh $ENV{'form.upfile'};
1697: }
1698: return $datatoken;
1699: }
1700:
1.56 matthew 1701: =pod
1702:
1.41 ng 1703: =item load_tmp_file($r)
1704:
1705: Load uploaded file from tmp, $r should be the HTTP Request object,
1706: needs $ENV{'form.datatoken'},
1707: sets $ENV{'form.upfile'} to the contents of the file
1708:
1709: =cut
1.31 albertel 1710:
1711: sub load_tmp_file {
1712: my $r=shift;
1713: my @studentdata=();
1714: {
1715: my $fh;
1716: if ($fh=Apache::File->new($r->dir_config('lonDaemons').
1717: '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
1718: @studentdata=<$fh>;
1719: }
1720: }
1721: $ENV{'form.upfile'}=join('',@studentdata);
1722: }
1723:
1.56 matthew 1724: =pod
1725:
1.41 ng 1726: =item upfile_record_sep()
1727:
1728: Separate uploaded file into records
1729: returns array of records,
1730: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
1731:
1732: =cut
1.31 albertel 1733:
1734: sub upfile_record_sep {
1735: if ($ENV{'form.upfiletype'} eq 'xml') {
1736: } else {
1737: return split(/\n/,$ENV{'form.upfile'});
1738: }
1739: }
1740:
1.56 matthew 1741: =pod
1742:
1.41 ng 1743: =item record_sep($record)
1744:
1745: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
1746:
1747: =cut
1748:
1.31 albertel 1749: sub record_sep {
1750: my $record=shift;
1751: my %components=();
1752: if ($ENV{'form.upfiletype'} eq 'xml') {
1753: } elsif ($ENV{'form.upfiletype'} eq 'space') {
1754: my $i=0;
1755: foreach (split(/\s+/,$record)) {
1756: my $field=$_;
1757: $field=~s/^(\"|\')//;
1758: $field=~s/(\"|\')$//;
1759: $components{$i}=$field;
1760: $i++;
1761: }
1762: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
1763: my $i=0;
1764: foreach (split(/\t+/,$record)) {
1765: my $field=$_;
1766: $field=~s/^(\"|\')//;
1767: $field=~s/(\"|\')$//;
1768: $components{$i}=$field;
1769: $i++;
1770: }
1771: } else {
1772: my @allfields=split(/\,/,$record);
1773: my $i=0;
1774: my $j;
1775: for ($j=0;$j<=$#allfields;$j++) {
1776: my $field=$allfields[$j];
1777: if ($field=~/^\s*(\"|\')/) {
1778: my $delimiter=$1;
1779: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
1780: $j++;
1781: $field.=','.$allfields[$j];
1782: }
1783: $field=~s/^\s*$delimiter//;
1784: $field=~s/$delimiter\s*$//;
1785: }
1786: $components{$i}=$field;
1787: $i++;
1788: }
1789: }
1790: return %components;
1791: }
1792:
1.56 matthew 1793: =pod
1794:
1.41 ng 1795: =item upfile_select_html()
1796:
1797: return HTML code to select file and specify its type
1798:
1799: =cut
1800:
1.31 albertel 1801: sub upfile_select_html {
1802: return (<<'ENDUPFORM');
1.57 albertel 1803: <input type="file" name="upfile" size="50" />
1.31 albertel 1804: <br />Type: <select name="upfiletype">
1805: <option value="csv">CSV (comma separated values, spreadsheet)</option>
1806: <option value="space">Space separated</option>
1807: <option value="tab">Tabulator separated</option>
1808: <option value="xml">HTML/XML</option>
1809: </select>
1810: ENDUPFORM
1811: }
1812:
1.56 matthew 1813: =pod
1814:
1.41 ng 1815: =item csv_print_samples($r,$records)
1816:
1817: Prints a table of sample values from each column uploaded $r is an
1818: Apache Request ref, $records is an arrayref from
1819: &Apache::loncommon::upfile_record_sep
1820:
1821: =cut
1822:
1.31 albertel 1823: sub csv_print_samples {
1824: my ($r,$records) = @_;
1825: my (%sone,%stwo,%sthree);
1826: %sone=&record_sep($$records[0]);
1827: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
1828: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
1829:
1830: $r->print('Samples<br /><table border="2"><tr>');
1831: foreach (sort({$a <=> $b} keys(%sone))) { $r->print('<th>Column '.($_+1).'</th>'); }
1832: $r->print('</tr>');
1833: foreach my $hash (\%sone,\%stwo,\%sthree) {
1834: $r->print('<tr>');
1835: foreach (sort({$a <=> $b} keys(%sone))) {
1836: $r->print('<td>');
1837: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
1838: $r->print('</td>');
1839: }
1840: $r->print('</tr>');
1841: }
1842: $r->print('</tr></table><br />'."\n");
1843: }
1844:
1.56 matthew 1845: =pod
1846:
1.41 ng 1847: =item csv_print_select_table($r,$records,$d)
1848:
1849: Prints a table to create associations between values and table columns.
1850: $r is an Apache Request ref,
1851: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
1852: $d is an array of 2 element arrays (internal name, displayed name)
1853:
1854: =cut
1855:
1.31 albertel 1856: sub csv_print_select_table {
1857: my ($r,$records,$d) = @_;
1858: my $i=0;my %sone;
1859: %sone=&record_sep($$records[0]);
1860: $r->print('Associate columns with student attributes.'."\n".
1861: '<table border="2"><tr><th>Attribute</th><th>Column</th></tr>'."\n");
1862: foreach (@$d) {
1863: my ($value,$display)=@{ $_ };
1864: $r->print('<tr><td>'.$display.'</td>');
1865:
1866: $r->print('<td><select name=f'.$i.
1.32 matthew 1867: ' onchange="javascript:flip(this.form,'.$i.');">');
1.31 albertel 1868: $r->print('<option value="none"></option>');
1869: foreach (sort({$a <=> $b} keys(%sone))) {
1870: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
1871: }
1872: $r->print('</select></td></tr>'."\n");
1873: $i++;
1874: }
1875: $i--;
1876: return $i;
1877: }
1.56 matthew 1878:
1879: =pod
1.31 albertel 1880:
1.41 ng 1881: =item csv_samples_select_table($r,$records,$d)
1882:
1883: Prints a table of sample values from the upload and can make associate samples to internal names.
1884:
1885: $r is an Apache Request ref,
1886: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
1887: $d is an array of 2 element arrays (internal name, displayed name)
1888:
1889: =cut
1890:
1.31 albertel 1891: sub csv_samples_select_table {
1892: my ($r,$records,$d) = @_;
1893: my %sone; my %stwo; my %sthree;
1894: my $i=0;
1895:
1896: $r->print('<table border=2><tr><th>Field</th><th>Samples</th></tr>');
1897: %sone=&record_sep($$records[0]);
1898: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
1899: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
1900:
1901: foreach (sort keys %sone) {
1902: $r->print('<tr><td><select name=f'.$i.
1.32 matthew 1903: ' onchange="javascript:flip(this.form,'.$i.');">');
1.31 albertel 1904: foreach (@$d) {
1905: my ($value,$display)=@{ $_ };
1906: $r->print('<option value='.$value.'>'.$display.'</option>');
1907: }
1908: $r->print('</select></td><td>');
1909: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
1910: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
1911: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
1912: $r->print('</td></tr>');
1913: $i++;
1914: }
1915: $i--;
1916: return($i);
1.25 albertel 1917: }
1.1 albertel 1918: 1;
1919: __END__;
1.17 harris41 1920:
1.41 ng 1921: =pod
1922:
1923: =back
1924:
1925: =head2 Access .tab File Data
1926:
1927: =over 4
1928:
1.35 matthew 1929: =item languageids()
1.17 harris41 1930:
1.35 matthew 1931: returns list of all language ids
1.17 harris41 1932:
1.35 matthew 1933: =item languagedescription()
1.17 harris41 1934:
1.35 matthew 1935: returns description of a specified language id
1.17 harris41 1936:
1.35 matthew 1937: =item copyrightids()
1.17 harris41 1938:
1.35 matthew 1939: returns list of all copyrights
1.17 harris41 1940:
1.35 matthew 1941: =item copyrightdescription()
1.17 harris41 1942:
1.35 matthew 1943: returns description of a specified copyright id
1.17 harris41 1944:
1.35 matthew 1945: =item filecategories()
1.17 harris41 1946:
1.35 matthew 1947: returns list of all file categories
1.17 harris41 1948:
1.35 matthew 1949: =item filecategorytypes()
1.17 harris41 1950:
1.35 matthew 1951: returns list of file types belonging to a given file
1.17 harris41 1952: category
1953:
1.35 matthew 1954: =item fileembstyle()
1.17 harris41 1955:
1.35 matthew 1956: returns embedding style for a specified file type
1.17 harris41 1957:
1.35 matthew 1958: =item filedescription()
1.17 harris41 1959:
1.35 matthew 1960: returns description for a specified file type
1.17 harris41 1961:
1.35 matthew 1962: =item filedescriptionex()
1.17 harris41 1963:
1.35 matthew 1964: returns description for a specified file type with
1.17 harris41 1965: extra formatting
1966:
1.41 ng 1967: =back
1968:
1969: =head2 Alternate Problem Views
1970:
1971: =over 4
1972:
1.35 matthew 1973: =item get_previous_attempt()
1.17 harris41 1974:
1.35 matthew 1975: return string with previous attempt on problem
1.17 harris41 1976:
1.35 matthew 1977: =item get_student_view()
1.17 harris41 1978:
1.35 matthew 1979: show a snapshot of what student was looking at
1.17 harris41 1980:
1.35 matthew 1981: =item get_student_answers()
1.17 harris41 1982:
1.35 matthew 1983: show a snapshot of how student was answering problem
1.17 harris41 1984:
1.41 ng 1985: =back
1986:
1987: =head2 HTTP Helper
1988:
1989: =over 4
1990:
1991: =item get_unprocessed_cgi($query,$possible_names)
1992:
1993: Modify the %ENV hash to contain unprocessed CGI form parameters held in
1994: $query. The parameters listed in $possible_names (an array reference),
1995: will be set in $ENV{'form.name'} if they do not already exist.
1.17 harris41 1996:
1.41 ng 1997: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
1998: $possible_names is an ref to an array of form element names. As an example:
1999: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
2000: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
1.17 harris41 2001:
1.35 matthew 2002: =item cacheheader()
1.17 harris41 2003:
1.35 matthew 2004: returns cache-controlling header code
1.17 harris41 2005:
1.65 matthew 2006: =item no_cache($r)
1.17 harris41 2007:
1.35 matthew 2008: specifies header code to not have cache
1.25 albertel 2009:
1.35 matthew 2010: =item add_to_env($name,$value)
1.25 albertel 2011:
1.35 matthew 2012: adds $name to the %ENV hash with value
1.25 albertel 2013: $value, if $name already exists, the entry is converted to an array
2014: reference and $value is added to the array.
1.17 harris41 2015:
2016: =back
2017:
2018: =cut
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