1: # The LearningOnline Network with CAPA
2: # Wrapper for external and binary files as standalone resources
3: #
4: # $Id: lonwrapper.pm,v 1.55 2016/11/30 16:02:27 raeburn 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:
29:
30: package Apache::lonwrapper;
31:
32: use strict;
33: use Apache::Constants qw(:common);
34: use Apache::lonenc();
35: use Apache::lonnet;
36: use Apache::lonlocal;
37: use Apache::loncommon();
38: use Apache::lonhtmlcommon();
39: use Apache::lonextresedit();
40: use Apache::lonexttool();
41: use LONCAPA qw(:DEFAULT :match);;
42:
43: # ================================================================ Main Handler
44: sub wrapper {
45: my ($url,$brcrum,$absolute,$is_ext,$is_pdf,$exttool,$title) = @_;
46:
47: my $forcereg;
48: unless ($env{'form.folderpath'}) {
49: $forcereg = 1;
50: }
51: my %lt = &Apache::lonlocal::texthash(
52: 'noif' => 'No iframe support.',
53: 'show' => 'Show content in pop-up window',
54: );
55:
56: my $anchor;
57: if ($is_ext) {
58: if ($env{'form.symb'}) {
59: (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
60: if ($res =~ /(#[^#]+)$/) {
61: $anchor = $1;
62: }
63: } elsif ($env{'form.anchor'} ne '') {
64: $anchor = '#'.$env{'form.anchor'};
65: }
66: }
67:
68: my $noiframe = &Apache::loncommon::modal_link($url.$anchor,$lt{'show'},500,400);
69: my $args = {'bgcolor' => '#FFFFFF'};
70: if ($forcereg) {
71: $args->{'force_register'} = $forcereg;
72: }
73: if (ref($brcrum) eq 'ARRAY') {
74: $args->{'bread_crumbs'} = $brcrum;
75: }
76: if ($absolute) {
77: $args->{'use_absolute'} = $absolute;
78: }
79:
80: my $startpage = &Apache::loncommon::start_page('Menu',undef,$args);
81: my $endpage = &Apache::loncommon::end_page();
82:
83: if (($env{'browser.mobile'}) || ($exttool eq 'window')) {
84: my $output = $startpage;
85: if ($is_pdf) {
86: if ($title eq '') {
87: $title = $env{'form.title'};
88: if ($title eq '') {
89: unless ($env{'request.enc'}) {
90: ($title) = ($url =~ m{/([^/]+)$});
91: $title =~ s/(\?[^\?]+)$//;
92: }
93: }
94: }
95: unless ($title eq '') {
96: $output .= $title.'<br />';
97: }
98: $output .= '<a href="'.$url.'">'.&mt('Link to PDF (for mobile devices)').'</a>';
99: } elsif ($exttool eq 'window') {
100: $output .= '<div>'.
101: '<a href="'.$url.'" target="LC_LTI" style="padding:0;clear:both;margin:0;border:0">'.
102: &mt('Launch External Tool').'</a>'.
103: '</div>';
104: } else {
105: $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
106: '<iframe src="'.$url.$anchor.'" height="100%" width="100%" frameborder="0">'."\n".
107: "$lt{'noif'} $noiframe\n".
108: "</iframe>\n".
109: "</div>\n";
110: }
111: $output .= $endpage;
112: return $output;
113: } else {
114: my $offset = 5;
115: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['inhibitmenu']);
116: if ($env{'form.inhibitmenu'} eq 'yes') {
117: $offset = 0;
118: }
119: my $script = &Apache::lonhtmlcommon::scripttag(<<SCRIPT);
120: \$(document).ready( function() {
121: \$(window).unbind('resize').resize(function(){
122: var header = null;
123: var offset = $offset;
124: var height = 0;
125: var hdrtop = 0;
126: if (\$('div.LC_head_subbox:first').length) {
127: header = \$('div.LC_head_subbox:first');
128: offset = 9;
129: } else {
130: if (\$('#LC_breadcrumbs').length) {
131: header = \$('#LC_breadcrumbs');
132: }
133: }
134: if (header != null && header.length) {
135: height = header.height();
136: hdrtop = header.position().top;
137: }
138: var pos = height + hdrtop + offset;
139: \$('.LC_iframecontainer').css('top', pos);
140: });
141: });
142: window.onload = function(){ \$(window).trigger('resize') };
143: SCRIPT
144: # javascript will position the iframe if window was resized (or zoomed)
145: return <<ENDFRAME;
146: $startpage
147: $script
148: <div class="LC_iframecontainer">
149: <iframe src="$url$anchor">$lt{'noif'} $noiframe</iframe>
150: </div>
151: $endpage
152: ENDFRAME
153: }
154: }
155:
156: sub handler {
157: my $r=shift;
158: &Apache::loncommon::content_type($r,'text/html');
159: $r->send_http_header;
160:
161: return OK if $r->header_only;
162:
163: my $url = $r->uri;
164: my ($is_ext,$brcrum,$absolute,$is_pdf,$exttool,$cdom,$cnum);
165:
166: for ($url){
167: s|^/adm/wrapper||;
168: $is_ext = $_ =~ s|^/ext/|http://|;
169: s|http://https://|https://|;
170: s|:|:|g;
171: }
172:
173:
174: if ($url =~ /\.pdf$/i) {
175: $is_pdf = 1;
176: } elsif ($url =~ m{^/adm/($match_domain)/($match_courseid)/(\d+)/exttools?$}) {
177: $cdom = $1;
178: $cnum = $2;
179: my $marker = $3;
180: $exttool = 'iframe';
181: my %toolhash = &Apache::lonnet::get('exttool_'.$marker,['target'],$cdom,$cnum);
182: if ($toolhash{'target'} eq 'window') {
183: $exttool = 'window';
184: }
185: }
186: if (($is_ext) || ($exttool)) {
187: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
188: ['forceedit','register','folderpath','symb','idx','title','anchor']);
189: if (($env{'form.forceedit'}) &&
190: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
191: (($env{'form.folderpath'} =~ /^supplemental/) ||
192: ($env{'form.symb'} =~ /^uploaded/))) {
193: if ($env{'form.symb'}) {
194: (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
195: if ($res =~ /(#[^#]+)$/) {
196: $url .= $1;
197: }
198: } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
199: if ($env{'form.anchor'} ne '') {
200: $url .= '#'.$env{'form.anchor'};
201: }
202: }
203: my $type = 'ext';
204: my %ltitools;
205: if ($exttool) {
206: $type = 'tool';
207: %ltitools = &Apache::lonnet::get_domain_ltitools($cdom);
208: }
209: $r->print(
210: &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
211: $env{'form.symb'},
212: $env{'form.idx'},$type,$cdom,
213: $cnum,\%ltitools));
214: return OK;
215: } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
216: my $crstype = &Apache::loncommon::course_type();
217: my $title = $env{'form.title'};
218: if ($title eq '') {
219: if ($is_ext) {
220: $title = &mt('External Resource');
221: } else {
222: $title = &mt('External Tool');
223: }
224: }
225: $brcrum =
226: &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
227: }
228: }
229:
230: #
231: # Actual URL
232: #
233: if ($url=~/$LONCAPA::assess_re/) {
234: #
235: # This is uploaded homework
236: #
237: $env{'request.state'}='uploaded';
238: &Apache::lonhomework::renderpage($r,$url);
239: } else {
240: #
241: # This is not homework
242: #
243: if (($is_ext) || ($exttool)) {
244: $absolute = $env{'request.use_absolute'};
245: $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
246: $ENV{'QUERY_STRING'} =~ s/\&$//;
247: }
248:
249: unless ($ENV{'QUERY_STRING'} eq '') {
250: $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
251: }
252:
253: # encrypt url if not external
254: unless ($is_ext || $exttool) {
255: &Apache::lonenc::check_encrypt(\$url);
256: }
257:
258: $r->print( wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$exttool) );
259:
260: } # not just the menu
261:
262: return OK;
263: } # handler
264:
265: 1;
266: __END__
267:
268: =pod
269:
270: =head1 NAME
271:
272: Apache::lonwrapper - External and binary file management.
273:
274: =head1 SYNOPSIS
275:
276: Wrapper for external and binary files as standalone resources. Edit handler for rat maps; TeX content handler.
277:
278: This is part of the LearningOnline Network with CAPA project
279: described at http://www.lon-capa.org.
280:
281: =head1 Subroutines
282:
283: =over
284:
285: =item wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$title))
286:
287: =over
288:
289: =item $url
290:
291: url to display by including in an iframe within a
292: LON-CAPA page which has a standard LON-CAPA inline menu.
293:
294: =item $brcrum
295:
296: breadcrumbs for unregistered urls
297: (i.e., external resources in Supplemental Content).
298:
299: =item $absolute
300:
301: contains protocol (http or https) followed by
302: the hostname, if menu items in the standard LON-CAPA
303: interface created by the call to loncommon::start_page()
304: within &wrapper() need to use absolute URLs rather than
305: relative URLs.
306:
307: That will be the case where an external resource has been
308: served from port 80, when the server customarily serves
309: requests using Apache/SSL (i.e., port 443). mod_rewrite
310: is used to switch requests for external resources and
311: the syllabus: /public/<domain>/<courseid>/syllabus
312: (which might also point at an external resource)
313: from https:// to http:// where the the URL of the remote site
314: specified in the resource itself is http://.
315:
316: This is done to avoid default mixed content blocking
317: in Firefox 23 and later, when serving from Apache/SSL.
318:
319: =item $is_ext
320:
321: true if URL is for an external resource.
322:
323: =item $is_pdf
324:
325: true if URL is for a PDF (based on file extension).
326:
327: =item $title
328:
329: optional. If wrapped item is a PDF, and $env{'browser.mobile'}
330: is true, a link to a PDF is shown. The "title" will be displayed
331: above the link, but if not provided as an arg, $env{'form.title'}
332: will be used, otherwise, the filename will be displayed (unless
333: hidden URL set for the resource).
334:
335: =back
336:
337: Returns markup for the entire page.
338:
339: =item handler()
340:
341: =back
342:
343: =cut
344:
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