Annotation of rat/lonpage.pm, revision 1.39
1.1 www 1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
1.39 ! www 4: # $Id: lonpage.pm,v 1.38 2002/05/21 02:26:16 albertel Exp $
1.29 www 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: #
1.1 www 28: # (TeX Content Handler
29: #
1.30 harris41 30: # YEAR=2000
1.1 www 31: # 05/29/00,05/30 Gerd Kortemeyer)
1.10 www 32: # 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
1.24 www 33: # 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16,
1.30 harris41 34: # YEAR=2001
1.27 www 35: # 08/13/01,08/30,10/1 Gerd Kortemeyer
1.30 harris41 36: # 12/16 Scott Harrison
1.33 www 37: # YEAR=2002
38: # 03/19 Gerd Kortemeyer
1.30 harris41 39: #
40: ###
1.1 www 41:
42: package Apache::lonpage;
43:
44: use strict;
45: use Apache::Constants qw(:common :http);
46: use Apache::lonnet();
1.30 harris41 47: use Apache::loncommon();
1.21 www 48: use Apache::lonxml();
1.6 www 49: use HTML::TokeParser;
1.1 www 50: use GDBM_File;
1.39 ! www 51: use Apache::lonsequence;
1.1 www 52:
1.2 www 53: # -------------------------------------------------------------- Module Globals
54: my %hash;
55: my @rows;
1.6 www 56:
57: # ------------------------------------------------------------------ Euclid gcd
58:
59: sub euclid {
60: my ($e,$f)=@_;
61: my $a; my $b; my $r;
62: if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
63: while ($r!=0) {
64: $a=$b; $b=$r;
65: $r=$a%$b;
66: }
67: return $b;
68: }
1.2 www 69:
70: # ------------------------------------------------------------ Build page table
71:
72: sub tracetable {
73: my ($sofar,$rid,$beenhere)=@_;
74: my $further=$sofar;
75: unless ($beenhere=~/\&$rid\&/) {
76: $beenhere.=$rid.'&';
77:
78: if (defined($hash{'is_map_'.$rid})) {
79: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
80: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
1.4 www 81: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
82: $sofar=
1.2 www 83: &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
1.3 www 84: '&'.$frid.'&');
1.4 www 85: $sofar++;
86: if ($hash{'src_'.$frid}) {
1.3 www 87: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
88: if (($brepriv eq '2') || ($brepriv eq 'F')) {
89: if (defined($rows[$sofar])) {
90: $rows[$sofar].='&'.$frid;
91: } else {
92: $rows[$sofar]=$frid;
93: }
94: }
1.4 www 95: }
1.2 www 96: }
97: } else {
1.4 www 98: $sofar++;
99: if ($hash{'src_'.$rid}) {
1.3 www 100: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
101: if (($brepriv eq '2') || ($brepriv eq 'F')) {
102: if (defined($rows[$sofar])) {
1.2 www 103: $rows[$sofar].='&'.$rid;
1.3 www 104: } else {
1.2 www 105: $rows[$sofar]=$rid;
1.3 www 106: }
107: }
1.4 www 108: }
1.2 www 109: }
110:
111: if (defined($hash{'to_'.$rid})) {
1.11 www 112: my $mincond=1;
113: my $next='';
1.30 harris41 114: foreach (split(/\,/,$hash{'to_'.$rid})) {
1.11 www 115: my $thiscond=
116: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
117: if ($thiscond>=$mincond) {
118: if ($next) {
119: $next.=','.$_.':'.$thiscond;
120: } else {
121: $next=$_.':'.$thiscond;
122: }
123: if ($thiscond>$mincond) { $mincond=$thiscond; }
124: }
1.30 harris41 125: }
126: foreach (split(/\,/,$next)) {
1.11 www 127: my ($linkid,$condval)=split(/\:/,$_);
128: if ($condval>=$mincond) {
129: my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
130: if ($now>$further) { $further=$now; }
131: }
1.30 harris41 132: }
1.11 www 133:
1.2 www 134: }
135: }
136: return $further;
137: }
138:
1.1 www 139: # ================================================================ Main Handler
140:
141: sub handler {
142: my $r=shift;
143:
1.3 www 144: # ------------------------------------------- Set document type for header only
1.1 www 145:
1.3 www 146: if ($r->header_only) {
147: if ($ENV{'browser.mathml'}) {
148: $r->content_type('text/xml');
149: } else {
150: $r->content_type('text/html');
151: }
152: $r->send_http_header;
153: return OK;
154: }
1.39 ! www 155:
! 156: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
! 157: ['forceselect','launch']);
1.1 www 158:
1.37 sakharuk 159: my $requrl=$r->uri;
160: my $target = $ENV{'form.grade_target'};
1.1 www 161: # ----------------------------------------------------------------- Tie db file
1.39 ! www 162: if (($ENV{'request.course.fn'}) && (!$ENV{'form.forceselect'})) {
1.1 www 163: my $fn=$ENV{'request.course.fn'};
164: if (-e "$fn.db") {
1.7 www 165: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) {
1.1 www 166: # ------------------------------------------------------------------- Hash tied
167: my $firstres=$hash{'map_start_'.$requrl};
168: my $lastres=$hash{'map_finish_'.$requrl};
169: if (($firstres) && ($lastres)) {
170: # ----------------------------------------------------------------- Render page
171:
1.3 www 172: @rows=();
1.2 www 173:
174: &tracetable(0,$firstres,'&'.$lastres.'&');
1.4 www 175: if ($hash{'src_'.$lastres}) {
176: my $brepriv=
177: &Apache::lonnet::allowed('bre',$hash{'src_'.$lastres});
178: if (($brepriv eq '2') || ($brepriv eq 'F')) {
179: $rows[$#rows+1]=''.$lastres;
180: }
181: }
1.2 www 182:
1.9 www 183: # ------------------------------------------------------------ Add to symb list
184:
1.2 www 185: my $i;
1.9 www 186: my %symbhash=();
187: for ($i=0;$i<=$#rows;$i++) {
188: if ($rows[$i]) {
189: my @colcont=split(/\&/,$rows[$i]);
1.30 harris41 190: foreach (@colcont) {
1.9 www 191: $symbhash{$hash{'src_'.$_}}='';
1.30 harris41 192: }
1.9 www 193: }
194: }
195: &Apache::lonnet::symblist($requrl,%symbhash);
196:
197: # ------------------------------------------------------------------ Page parms
198:
1.4 www 199: my $j;
1.6 www 200: my $lcm=1;
201: my $contents=0;
1.7 www 202: my $nforms=0;
1.6 www 203:
204: my %ssibody=();
205: my %ssibgcolor=();
206: my %ssitext=();
207: my %ssilink=();
208: my %ssivlink=();
209: my %ssialink=();
1.14 www 210:
211: my %metalink=();
212:
1.6 www 213: my %cellemb=();
1.3 www 214:
1.7 www 215: my $allscript='';
216: my $allmeta='';
217:
218: my $isxml=0;
219: my $xmlheader='';
220: my $xmlbody='';
221:
1.3 www 222: # --------------------------------------------- Get SSI output, post parameters
223:
1.2 www 224: for ($i=0;$i<=$#rows;$i++) {
1.4 www 225: if ($rows[$i]) {
1.6 www 226: $contents++;
1.3 www 227: my @colcont=split(/\&/,$rows[$i]);
1.6 www 228: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
1.30 harris41 229: foreach (@colcont) {
1.3 www 230: my $src=$hash{'src_'.$_};
1.5 www 231: $src=~/\.(\w+)$/;
1.14 www 232: $metalink{$_}=$src.'.meta';
1.30 harris41 233: $cellemb{$_}=Apache::loncommon::fileembstyle($1);
1.3 www 234: if ($cellemb{$_} eq 'ssi') {
235: # --------------------------------------------------------- This is an SSI cell
1.5 www 236: my $prefix=$_.'_';
237: my %posthash=('request.prefix' => $prefix);
1.8 www 238: if (($ENV{'form.'.$prefix.'submit'})
1.7 www 239: || ($ENV{'form.all_submit'})) {
1.30 harris41 240: foreach (keys %ENV) {
1.5 www 241: if ($_=~/^form.$prefix/) {
242: my $name=$_;
243: $name=~s/^form.$prefix//;
244: $posthash{$name}=$ENV{$_};
245: }
1.30 harris41 246: }
1.7 www 247: }
1.5 www 248: my $output=Apache::lonnet::ssi($src,%posthash);
1.6 www 249: my $parser=HTML::TokeParser->new(\$output);
250: my $token;
1.12 www 251: my $thisdir=$src;
1.6 www 252: my $bodydef=0;
1.7 www 253: my $thisxml=0;
1.12 www 254: my @rlinks=();
1.7 www 255: if ($output=~/\?xml/) {
256: $isxml=1;
257: $thisxml=1;
258: $output=~
259: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
260: $xmlheader=$1;
261: }
1.12 www 262: while ($token=$parser->get_token) {
263: if ($token->[0] eq 'S') {
264: if ($token->[1] eq 'a') {
265: if ($token->[2]->{'href'}) {
266: $rlinks[$#rlinks+1]=
267: $token->[2]->{'href'};
268: }
269: } elsif ($token->[1] eq 'img') {
270: $rlinks[$#rlinks+1]=
271: $token->[2]->{'src'};
272: } elsif ($token->[1] eq 'embed') {
273: $rlinks[$#rlinks+1]=
274: $token->[2]->{'src'};
275: } elsif ($token->[1] eq 'base') {
276: $thisdir=$token->[2]->{'href'};
277: } elsif ($token->[1] eq 'body') {
1.7 www 278: $bodydef=1;
279: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
280: $ssitext{$_}=$token->[2]->{'text'};
281: $ssilink{$_}=$token->[2]->{'link'};
282: $ssivlink{$_}=$token->[2]->{'vlink'};
283: $ssialink{$_}=$token->[2]->{'alink'};
284: if ($thisxml) {
285: $xmlbody=$token->[4];
286: }
1.12 www 287: } elsif ($token->[1] eq 'meta') {
1.28 albertel 288: if ($token->[4] !~ m:/>$:) {
1.7 www 289: $allmeta.="\n".$token->[4].'</meta>';
1.28 albertel 290: } else {
291: $allmeta.="\n".$token->[4];
292: }
1.12 www 293: } elsif (($token->[1] eq 'script') &&
294: ($bodydef==0)) {
1.7 www 295: $allscript.="\n\n"
296: .$parser->get_text('/script');
1.6 www 297: }
1.12 www 298: }
299: }
1.6 www 300: if ($output=~/\<body[^\>]*\>(.*)/si) {
301: $output=$1;
302: }
303: $output=~s/\<\/body\>.*//si;
1.7 www 304: if ($output=~/\<form/si) {
305: $nforms++;
306: $output=~s/\<form[^\>]*\>//gsi;
307: $output=~s/\<\/form[^\>]*\>//gsi;
1.17 www 308: $output=~
1.18 www 309: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([\w\.\:]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
1.7 www 310: }
1.12 www 311: $thisdir=~s/\/[^\/]*$//;
1.30 harris41 312: foreach (@rlinks) {
1.12 www 313: unless (($_=~/^http:\/\//i) ||
1.31 albertel 314: ($_=~/^\//) ||
315: ($_=~/^javascript:/i) ||
316: ($_=~/^mailto:/i) ||
317: ($_=~/^\#/)) {
1.12 www 318: my $newlocation=
319: &Apache::lonnet::hreflocation($thisdir,$_);
320: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
321: }
1.30 harris41 322: }
1.24 www 323: # -------------------------------------------------- Deal with Applet codebases
324: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
1.5 www 325: $ssibody{$_}=$output;
1.3 www 326: # ---------------------------------------------------------------- End SSI cell
327: }
1.30 harris41 328: }
1.4 www 329: }
1.2 www 330: }
1.6 www 331: unless ($contents) {
1.3 www 332: $r->content_type('text/html');
333: $r->send_http_header;
334: $r->print('<html><body>Empty page.</body></html>');
335: } else {
336: # ------------------------------------------------------------------ Build page
1.7 www 337:
338: # ---------------------------------------------------------------- Send headers
1.37 sakharuk 339: unless ($target eq 'tex') {
340: if ($isxml) {
341: $r->content_type('text/xml');
342: $r->send_http_header;
343: $r->print($xmlheader);
344: } else {
345: $r->content_type('text/html');
346: $r->send_http_header;
347: $r->print('<html>');
348: }
1.7 www 349: # ------------------------------------------------------------------------ Head
1.37 sakharuk 350: $r->print("\n<head>\n".$allmeta);
351: $allscript=~
352: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
353: if ($allscript) {
354: $r->print("\n<script language='JavaScript'>\n".
355: $allscript."\n</script>\n");
356: }
357: $r->print(&Apache::lonxml::registerurl(1,undef));
358: $r->print("\n</head>\n");
1.7 www 359: # ------------------------------------------------------------------ Start body
1.37 sakharuk 360: if ($isxml) {
361: $r->print($xmlbody);
362: } else {
363: $r->print('<body bgcolor="#FFFFFF" onLoad="'.&Apache::lonxml::loadevents.'" onUnload="'.&Apache::lonxml::unloadevents.'">');
364: }
1.7 www 365: # ------------------------------------------------------------------ Start form
1.37 sakharuk 366: if ($nforms) {
367: $r->print('<form method="post" action="'.
368: $requrl.'">');
369: }
1.7 www 370: # ----------------------------------------------------------------- Start table
1.37 sakharuk 371: $r->print('<table cols="'.$lcm.'" border="0">');
372: }
1.5 www 373: for ($i=0;$i<=$#rows;$i++) {
374: if ($rows[$i]) {
1.37 sakharuk 375: unless ($target eq 'tex') {
376: $r->print("\n<tr>");
377: }
1.4 www 378: my @colcont=split(/\&/,$rows[$i]);
1.6 www 379: my $avespan=$lcm/($#colcont+1);
380: for ($j=0;$j<=$#colcont;$j++) {
381: my $rid=$colcont[$j];
1.23 www 382: my $metainfo='<a href="'.
383: $metalink{$rid}.'" target="LONcatInfo">'.
384: '<img src="/adm/lonMisc/cat_button.gif" border=0>'.
1.34 www 385: '</img></a><a href="/adm/evaluate?postdata='.
1.35 www 386: &Apache::lonnet::escape(&Apache::lonnet::declutter($hash{'src_'.$rid}))
387: .'" target="LONcatInfo">'.
1.33 www 388: '<img src="/adm/lonMisc/eval_button.gif" border=0>'.
389: '</img></a>';
1.27 www 390: if (
391: ($hash{'src_'.$rid}=~/\.(problem|exam|quiz|assess|survey|form)$/) &&
392: (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'}))) {
393: my ($mapid,$resid)=split(/\./,$rid);
394: my $symb=
395: &Apache::lonnet::declutter($hash{'map_id_'.$mapid}).
396: '___'.$resid.'___'.
397: &Apache::lonnet::declutter($hash{'src_'.$rid});
398: $metainfo.=
1.36 www 399: '<a href="/adm/grades?symb='.&Apache::lonnet::escape($symb).
1.27 www 400: '&command=submission" target="LONcatInfo">'.
401: '<img src="/adm/lonMisc/subm_button.gif" border=0>'.
402: '</img></a>'.
1.36 www 403: '<a href="/adm/grades?symb='.&Apache::lonnet::escape($symb).
1.38 albertel 404: '&command=gradingmenu" target="LONcatInfo">'.
1.27 www 405: '<img src="/adm/lonMisc/pgrd_button.gif" border=0>'.
406: '</img></a>'.
1.36 www 407: '<a href="/adm/parmset?symb='.&Apache::lonnet::escape($symb).
408: '" target="LONcatInfo">'.
1.27 www 409: '<img src="/adm/lonMisc/pprm_button.gif" border=0>'.
410: '</img></a>';
411: }
412: $metainfo.='<br></br>';
1.37 sakharuk 413: unless ($target eq 'tex') {
414: $r->print('<td colspan="'.$avespan.'"');
415: }
1.6 www 416: if ($cellemb{$rid} eq 'ssi') {
1.37 sakharuk 417: unless ($target eq 'tex') {
418: if ($ssibgcolor{$rid}) {
419: $r->print(' bgcolor="'.
420: $ssibgcolor{$rid}.'"');
421: }
422: $r->print('>'.$metainfo.'<font');
423:
424: if ($ssitext{$rid}) {
425: $r->print(' text="'.$ssitext{$rid}.'"');
426: }
427: if ($ssilink{$rid}) {
428: $r->print(' link="'.$ssilink{$rid}.'"');
429: }
430: if ($ssitext{$rid}) {
431: $r->print(' vlink="'.$ssivlink{$rid}.'"');
432: }
433: if ($ssialink{$rid}) {
434: $r->print(' alink="'.$ssialink{$rid}.'"');
435: }
436: $r->print('>');
437: }
438: $r->print($ssibody{$rid});
439: unless ($target eq 'tex') {
440: $r->print('</font>');
441: }
442: } elsif ($cellemb{$rid} eq 'img') {
1.14 www 443: $r->print('>'.$metainfo.'<img src="'.
1.7 www 444: $hash{'src_'.$rid}.'"></img>');
1.13 www 445: } elsif ($cellemb{$rid} eq 'emb') {
1.14 www 446: $r->print('>'.$metainfo.'<embed src="'.
1.13 www 447: $hash{'src_'.$rid}.'"></embed>');
448: }
1.37 sakharuk 449: unless ($target eq 'tex') {
450: $r->print('</td>');
451: }
1.4 www 452: }
1.37 sakharuk 453: unless ($target eq 'tex') {
454: $r->print('</tr>');
455: }
1.5 www 456: }
1.4 www 457: }
1.37 sakharuk 458: unless ($target eq 'tex') {
459: $r->print("\n</table>");
460: }
1.7 www 461: # ---------------------------------------------------------------- Submit, etc.
462: if ($nforms) {
463: $r->print(
464: '<input name="all_submit" value="Submit All" type="'.
465: (($nforms>1)?'submit':'hidden').'"></input></form>');
466: }
1.25 www 467: $r->print('</body>'.&Apache::lonxml::xmlend());
1.3 www 468: # -------------------------------------------------------------------- End page
469: }
1.1 www 470: # ------------------------------------------------------------- End render page
471: } else {
1.3 www 472: $r->content_type('text/html');
473: $r->send_http_header;
1.39 ! www 474: &Apache::lonsequence::viewmap($r,$requrl);
1.1 www 475: }
476: # ------------------------------------------------------------------ Untie hash
477: unless (untie(%hash)) {
478: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
479: "Could not untie coursemap $fn (browse).</font>");
480: }
481: # -------------------------------------------------------------------- All done
482: return OK;
483: # ----------------------------------------------- Errors, hash could no be tied
484: }
485: }
486: }
1.39 ! www 487: $r->content_type('text/html');
! 488: $r->send_http_header;
! 489: &Apache::lonsequence::viewmap($r,$requrl);
! 490: return OK;
1.1 www 491: }
492:
493: 1;
494: __END__
495:
1.30 harris41 496: =head1 NAME
497:
498: Apache::lonpage - Page Handler
499:
500: =head1 SYNOPSIS
501:
502: Invoked by /etc/httpd/conf/srm.conf:
503:
504: <LocationMatch "^/res/.*\.page$>
505: SetHandler perl-script
506: PerlHandler Apache::lonpage
507: </LocationMatch>
508:
509: =head1 INTRODUCTION
510:
511: This module renders a .page resource.
512:
513: This is part of the LearningOnline Network with CAPA project
514: described at http://www.lon-capa.org.
515:
516: =head1 HANDLER SUBROUTINE
517:
518: This routine is called by Apache and mod_perl.
519:
520: =over 4
521:
522: =item *
523:
524: set document type for header only
525:
526: =item *
527:
528: tie db file
529:
530: =item *
531:
532: render page
533:
534: =item *
535:
536: add to symb list
537:
538: =item *
539:
540: page parms
541:
542: =item *
543:
544: Get SSI output, post parameters
545:
546: =item *
547:
548: SSI cell rendering
549:
550: =item *
551:
552: Deal with Applet codebases
553:
554: =item *
555:
556: Build page
557:
558: =item *
559:
560: send headers
561:
562: =item *
563:
564: start body
565:
566: =item *
567:
568: start form
569:
570: =item *
571:
572: start table
573:
574: =item *
575:
576: submit element, etc, render page, untie hash
577:
578: =back
579:
580: =head1 OTHER SUBROUTINES
581:
582: =over 4
583:
584: =item *
585:
586: euclid() : Euclid's method for determining the greatest common denominator.
587:
588: =item *
589:
590: tracetable() : Build page table.
1.1 www 591:
1.30 harris41 592: =back
1.1 www 593:
1.30 harris41 594: =cut
1.1 www 595:
596:
597:
598:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonpage.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / rat