1: # The LearningOnline Network with CAPA
2: # Wrapper for external and binary files as standalone resources
3: #
4: # $Id: lonwrapper.pm,v 1.49.2.1 2016/08/05 21:34:54 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:
41: # ================================================================ Main Handler
42: sub wrapper {
43: my ($url,$brcrum,$absolute,$is_ext,$is_pdf,$title) = @_;
44:
45: my $forcereg;
46: unless ($env{'form.folderpath'}) {
47: $forcereg = 1;
48: }
49:
50: my %lt = &Apache::lonlocal::texthash(
51: 'noif' => 'No iframe support.',
52: 'show' => 'Show content in pop-up window',
53: );
54:
55: my $anchor;
56: if (($is_ext) && ($env{'form.symb'})) {
57: (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
58: if ($res =~ /(\#.+)$/) {
59: $anchor = $1;
60: }
61: }
62:
63: my $noiframe = &Apache::loncommon::modal_link($url.$anchor,$lt{'show'},500,400);
64: my $args = {'bgcolor' => '#FFFFFF'};
65: if ($forcereg) {
66: $args->{'force_register'} = $forcereg;
67: }
68: if (ref($brcrum) eq 'ARRAY') {
69: $args->{'bread_crumbs'} = $brcrum;
70: }
71: if ($absolute) {
72: $args->{'use_absolute'} = $absolute;
73: }
74:
75: my $startpage = &Apache::loncommon::start_page('Menu',undef,$args);
76: my $endpage = &Apache::loncommon::end_page();
77:
78: if ($env{'browser.mobile'}) {
79: my $output = $startpage;
80: if ($is_pdf) {
81: if ($title eq '') {
82: $title = $env{'form.title'};
83: if ($title eq '') {
84: unless ($env{'request.enc'}) {
85: ($title) = ($url =~ m{/([^/]+)$});
86: $title =~ s/(\?[^\?]+)$//;
87: }
88: }
89: }
90: unless ($title eq '') {
91: $output .= $title.'<br />';
92: }
93: $output .= '<a href="'.$url.'">'.&mt('Link to PDF (for mobile devices)').'</a>';
94: } else {
95: $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
96: '<iframe src="'.$url.$anchor.'" height="100%" width="100%" frameborder="0">'."\n".
97: "$lt{'noif'} $noiframe\n".
98: "</iframe>\n".
99: "</div>\n";
100: }
101: $output .= $endpage;
102: return $output;
103: } else {
104: my $script = &Apache::lonhtmlcommon::scripttag(<<SCRIPT);
105: \$(document).ready( function() {
106: \$(window).unbind('resize').resize(function(){
107: var header;
108: var offset = 5;
109: var height = 0;
110: var hdrtop = 0;
111: if (\$('div.LC_head_subbox:first').length) {
112: header = \$('div.LC_head_subbox:first');
113: offset = 9;
114: } else {
115: if (\$('#LC_breadcrumbs').length) {
116: header = \$('#LC_breadcrumbs');
117: }
118: }
119: if (header.length) {
120: height = header.height();
121: hdrtop = header.position().top;
122: }
123: var pos = height + hdrtop + offset;
124: \$('.LC_iframecontainer').css('top', pos);
125: });
126: });
127: window.onload = function(){ \$(window).trigger('resize') };
128: SCRIPT
129: # javascript will position the iframe if window was resized (or zoomed)
130: return <<ENDFRAME;
131: $startpage
132: $script
133: <div class="LC_iframecontainer">
134: <iframe src="$url$anchor">$lt{'noif'} $noiframe</iframe>
135: </div>
136: $endpage
137: ENDFRAME
138: }
139: }
140:
141: sub handler {
142: my $r=shift;
143: &Apache::loncommon::content_type($r,'text/html');
144: $r->send_http_header;
145:
146: return OK if $r->header_only;
147:
148: my $url = $r->uri;
149: my ($is_ext,$brcrum,$absolute,$is_pdf);
150:
151: for ($url){
152: s|^/adm/wrapper||;
153: $is_ext = $_ =~ s|^/ext/|http://|;
154: s|http://https://|https://|;
155: s|:|:|g;
156: }
157:
158: if ($url =~ /\.pdf$/i) {
159: $is_pdf = 1;
160: }
161:
162: if ($is_ext) {
163: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
164: ['forceedit','register','folderpath','symb','idx','title']);
165: if (($env{'form.forceedit'}) &&
166: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
167: (($env{'form.folderpath'} =~ /^supplemental/) ||
168: ($env{'form.symb'} =~ /^uploaded/))) {
169: $r->print(
170: &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
171: $env{'form.symb'},
172: $env{'form.idx'}));
173: return OK;
174: } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
175: my $crstype = &Apache::loncommon::course_type();
176: my $title = $env{'form.title'};
177: if ($title eq '') {
178: $title = &mt('External Resource');
179: }
180: $brcrum =
181: &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
182: }
183: }
184:
185: #
186: # Actual URL
187: #
188: if ($url=~/$LONCAPA::assess_re/) {
189: #
190: # This is uploaded homework
191: #
192: $env{'request.state'}='uploaded';
193: &Apache::lonhomework::renderpage($r,$url);
194: } else {
195: #
196: # This is not homework
197: #
198: if ($is_ext) {
199: $absolute = $env{'request.use_absolute'};
200: $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
201: $ENV{'QUERY_STRING'} =~ s/\&$//;
202: }
203:
204: unless ($ENV{'QUERY_STRING'} eq '') {
205: $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
206: }
207:
208: # encrypt url if not external
209: &Apache::lonenc::check_encrypt(\$url) if $url !~ /^https?\:/ ;
210:
211: $r->print( wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf) );
212:
213: } # not just the menu
214:
215: return OK;
216: } # handler
217:
218: 1;
219: __END__
220:
221: =pod
222:
223: =head1 NAME
224:
225: Apache::lonwrapper - External and binary file management.
226:
227: =head1 SYNOPSIS
228:
229: Wrapper for external and binary files as standalone resources. Edit handler for rat maps; TeX content handler.
230:
231: This is part of the LearningOnline Network with CAPA project
232: described at http://www.lon-capa.org.
233:
234: =head1 Subroutines
235:
236: =over
237:
238: =item wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$title))
239:
240: =over
241:
242: =item $url
243:
244: url to display by including in an iframe within a
245: LON-CAPA page which has a standard LON-CAPA inline menu.
246:
247: =item $brcrum
248:
249: breadcrumbs for unregistered urls
250: (i.e., external resources in Supplemental Content).
251:
252: =item $absolute
253:
254: contains protocol (http or https) followed by
255: the hostname, if menu items in the standard LON-CAPA
256: interface created by the call to loncommon::start_page()
257: within &wrapper() need to use absolute URLs rather than
258: relative URLs.
259:
260: That will be the case where an external resource has been
261: served from port 80, when the server customarily serves
262: requests using Apache/SSL (i.e., port 443). mod_rewrite
263: is used to switch requests for external resources and
264: the syllabus: /public/<domain>/<courseid>/syllabus
265: (which might also point at an external resource)
266: from https:// to http:// where the the URL of the remote site
267: specified in the resource itself is http://.
268:
269: This is done to avoid default mixed content blocking
270: in Firefox 23 and later, when serving from Apache/SSL.
271:
272: =item $is_ext
273:
274: true if URL is for an external resource.
275:
276: =item $is_pdf
277:
278: true if URL is for a PDF (based on file extension).
279:
280: =item $title
281:
282: optional. If wrapped item is a PDF, and $env{'browser.mobile'}
283: is true, a link to a PDF is shown. The "title" will be displayed
284: above the link, but if not provided as an arg, $env{'form.title'}
285: will be used, otherwise, the filename will be displayed (unless
286: hidden URL set for the resource).
287:
288: =back
289:
290: Returns markup for the entire page.
291:
292: =item handler()
293:
294: =back
295:
296: =cut
297:
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