1: # The LearningOnline Network with CAPA
2: # Wrapper for external and binary files as standalone resources
3: #
4: # $Id: lonwrapper.pm,v 1.49.2.2 2016/10/31 21:31:42 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) {
57: if ($env{'form.symb'}) {
58: (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
59: if ($res =~ /(\#.+)$/) {
60: $anchor = $1;
61: }
62: } elsif ($env{'form.anchor'} ne '') {
63: $anchor = '#'.$env{'form.anchor'};
64: }
65: }
66:
67: my $noiframe = &Apache::loncommon::modal_link($url.$anchor,$lt{'show'},500,400);
68: my $args = {'bgcolor' => '#FFFFFF'};
69: if ($forcereg) {
70: $args->{'force_register'} = $forcereg;
71: }
72: if (ref($brcrum) eq 'ARRAY') {
73: $args->{'bread_crumbs'} = $brcrum;
74: }
75: if ($absolute) {
76: $args->{'use_absolute'} = $absolute;
77: }
78:
79: my $startpage = &Apache::loncommon::start_page('Menu',undef,$args);
80: my $endpage = &Apache::loncommon::end_page();
81:
82: if ($env{'browser.mobile'}) {
83: my $output = $startpage;
84: if ($is_pdf) {
85: if ($title eq '') {
86: $title = $env{'form.title'};
87: if ($title eq '') {
88: unless ($env{'request.enc'}) {
89: ($title) = ($url =~ m{/([^/]+)$});
90: $title =~ s/(\?[^\?]+)$//;
91: }
92: }
93: }
94: unless ($title eq '') {
95: $output .= $title.'<br />';
96: }
97: $output .= '<a href="'.$url.'">'.&mt('Link to PDF (for mobile devices)').'</a>';
98: } else {
99: $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
100: '<iframe src="'.$url.$anchor.'" height="100%" width="100%" frameborder="0">'."\n".
101: "$lt{'noif'} $noiframe\n".
102: "</iframe>\n".
103: "</div>\n";
104: }
105: $output .= $endpage;
106: return $output;
107: } else {
108: my $script = &Apache::lonhtmlcommon::scripttag(<<SCRIPT);
109: \$(document).ready( function() {
110: \$(window).unbind('resize').resize(function(){
111: var header;
112: var offset = 5;
113: var height = 0;
114: var hdrtop = 0;
115: if (\$('div.LC_head_subbox:first').length) {
116: header = \$('div.LC_head_subbox:first');
117: offset = 9;
118: } else {
119: if (\$('#LC_breadcrumbs').length) {
120: header = \$('#LC_breadcrumbs');
121: }
122: }
123: if (header.length) {
124: height = header.height();
125: hdrtop = header.position().top;
126: }
127: var pos = height + hdrtop + offset;
128: \$('.LC_iframecontainer').css('top', pos);
129: });
130: });
131: window.onload = function(){ \$(window).trigger('resize') };
132: SCRIPT
133: # javascript will position the iframe if window was resized (or zoomed)
134: return <<ENDFRAME;
135: $startpage
136: $script
137: <div class="LC_iframecontainer">
138: <iframe src="$url$anchor">$lt{'noif'} $noiframe</iframe>
139: </div>
140: $endpage
141: ENDFRAME
142: }
143: }
144:
145: sub handler {
146: my $r=shift;
147: &Apache::loncommon::content_type($r,'text/html');
148: $r->send_http_header;
149:
150: return OK if $r->header_only;
151:
152: my $url = $r->uri;
153: my ($is_ext,$brcrum,$absolute,$is_pdf);
154:
155: for ($url){
156: s|^/adm/wrapper||;
157: $is_ext = $_ =~ s|^/ext/|http://|;
158: s|http://https://|https://|;
159: s|:|:|g;
160: }
161:
162: if ($url =~ /\.pdf$/i) {
163: $is_pdf = 1;
164: }
165:
166: if ($is_ext) {
167: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
168: ['forceedit','register','folderpath','symb','idx','title','anchor']);
169: if (($env{'form.forceedit'}) &&
170: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
171: (($env{'form.folderpath'} =~ /^supplemental/) ||
172: ($env{'form.symb'} =~ /^uploaded/))) {
173: if ($env{'form.symb'}) {
174: (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
175: if ($res =~ /(#[^#]+)$/) {
176: $url .= $1;
177: }
178: } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
179: if ($env{'form.anchor'} ne '') {
180: $url .= '#'.$env{'form.anchor'};
181: }
182: }
183: $r->print(
184: &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
185: $env{'form.symb'},
186: $env{'form.idx'}));
187: return OK;
188: } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
189: my $crstype = &Apache::loncommon::course_type();
190: my $title = $env{'form.title'};
191: if ($title eq '') {
192: $title = &mt('External Resource');
193: }
194: $brcrum =
195: &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
196: }
197: }
198:
199: #
200: # Actual URL
201: #
202: if ($url=~/$LONCAPA::assess_re/) {
203: #
204: # This is uploaded homework
205: #
206: $env{'request.state'}='uploaded';
207: &Apache::lonhomework::renderpage($r,$url);
208: } else {
209: #
210: # This is not homework
211: #
212: if ($is_ext) {
213: $absolute = $env{'request.use_absolute'};
214: $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
215: $ENV{'QUERY_STRING'} =~ s/\&$//;
216: }
217:
218: unless ($ENV{'QUERY_STRING'} eq '') {
219: $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
220: }
221:
222: # encrypt url if not external
223: &Apache::lonenc::check_encrypt(\$url) if $url !~ /^https?\:/ ;
224:
225: $r->print( wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf) );
226:
227: } # not just the menu
228:
229: return OK;
230: } # handler
231:
232: 1;
233: __END__
234:
235: =pod
236:
237: =head1 NAME
238:
239: Apache::lonwrapper - External and binary file management.
240:
241: =head1 SYNOPSIS
242:
243: Wrapper for external and binary files as standalone resources. Edit handler for rat maps; TeX content handler.
244:
245: This is part of the LearningOnline Network with CAPA project
246: described at http://www.lon-capa.org.
247:
248: =head1 Subroutines
249:
250: =over
251:
252: =item wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$title))
253:
254: =over
255:
256: =item $url
257:
258: url to display by including in an iframe within a
259: LON-CAPA page which has a standard LON-CAPA inline menu.
260:
261: =item $brcrum
262:
263: breadcrumbs for unregistered urls
264: (i.e., external resources in Supplemental Content).
265:
266: =item $absolute
267:
268: contains protocol (http or https) followed by
269: the hostname, if menu items in the standard LON-CAPA
270: interface created by the call to loncommon::start_page()
271: within &wrapper() need to use absolute URLs rather than
272: relative URLs.
273:
274: That will be the case where an external resource has been
275: served from port 80, when the server customarily serves
276: requests using Apache/SSL (i.e., port 443). mod_rewrite
277: is used to switch requests for external resources and
278: the syllabus: /public/<domain>/<courseid>/syllabus
279: (which might also point at an external resource)
280: from https:// to http:// where the the URL of the remote site
281: specified in the resource itself is http://.
282:
283: This is done to avoid default mixed content blocking
284: in Firefox 23 and later, when serving from Apache/SSL.
285:
286: =item $is_ext
287:
288: true if URL is for an external resource.
289:
290: =item $is_pdf
291:
292: true if URL is for a PDF (based on file extension).
293:
294: =item $title
295:
296: optional. If wrapped item is a PDF, and $env{'browser.mobile'}
297: is true, a link to a PDF is shown. The "title" will be displayed
298: above the link, but if not provided as an arg, $env{'form.title'}
299: will be used, otherwise, the filename will be displayed (unless
300: hidden URL set for the resource).
301:
302: =back
303:
304: Returns markup for the entire page.
305:
306: =item handler()
307:
308: =back
309:
310: =cut
311:
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