File:
[LON-CAPA] /
rat /
lonwrapper.pm
Revision
1.49:
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Tue Jun 17 23:22:21 2014 UTC (9 years, 11 months ago) by
raeburn
Branches:
MAIN
CVS tags:
version_2_11_X,
version_2_11_1,
version_2_11_0,
HEAD
- On Apache/SSL servers syllabus should always be served by http:// to avoid
"mixed content" issue when syllabus is an external resource on http:// server).
- Set $env{'request.use_absolute'} and pass in args to start page so postdata
is preserved. (bug 6662).
- Code used for same purpose in rat/lonwrapper.pm rev. 1.44 for external
resources moved to lonacc.pm to facilitate re-use.
- Detect if syllabus template replaced with uploaded PDF or link to external
PDF file, and send as arg in call to lonwrapper.pm, to circumvent lack of
scrolling for multi-page PDFs in iframes on iOS.
1: # The LearningOnline Network with CAPA
2: # Wrapper for external and binary files as standalone resources
3: #
4: # $Id: lonwrapper.pm,v 1.49 2014/06/17 23:22:21 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 $noiframe = &Apache::loncommon::modal_link($url,$lt{'show'},500,400);
56: my $args = {'bgcolor' => '#FFFFFF'};
57: if ($forcereg) {
58: $args->{'force_register'} = $forcereg;
59: }
60: if (ref($brcrum) eq 'ARRAY') {
61: $args->{'bread_crumbs'} = $brcrum;
62: }
63: if ($absolute) {
64: $args->{'use_absolute'} = $absolute;
65: }
66:
67: my $startpage = &Apache::loncommon::start_page('Menu',undef,$args);
68: my $endpage = &Apache::loncommon::end_page();
69:
70: if ($env{'browser.mobile'}) {
71: my $output = $startpage;
72: if ($is_pdf) {
73: if ($title eq '') {
74: $title = $env{'form.title'};
75: if ($title eq '') {
76: unless ($env{'request.enc'}) {
77: ($title) = ($url =~ m{/([^/]+)$});
78: $title =~ s/(\?[^\?]+)$//;
79: }
80: }
81: }
82: unless ($title eq '') {
83: $output .= $title.'<br />';
84: }
85: $output .= '<a href="'.$url.'">'.&mt('Link to PDF (for mobile devices)').'</a>';
86: } else {
87: $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
88: '<iframe src="'.$url.'" height="100%" width="100%" frameborder="0">'."\n".
89: "$lt{'noif'} $noiframe\n".
90: "</iframe>\n".
91: "</div>\n";
92: }
93: $output .= $endpage;
94: return $output;
95: } else {
96: my $script = &Apache::lonhtmlcommon::scripttag(<<SCRIPT);
97: \$(document).ready( function() {
98: \$(window).unbind('resize').resize(function(){
99: var header;
100: var offset = 5;
101: var height = 0;
102: var hdrtop = 0;
103: if (\$('div.LC_head_subbox:first').length) {
104: header = \$('div.LC_head_subbox:first');
105: offset = 9;
106: } else {
107: if (\$('#LC_breadcrumbs').length) {
108: header = \$('#LC_breadcrumbs');
109: }
110: }
111: if (header.length) {
112: height = header.height();
113: hdrtop = header.position().top;
114: }
115: var pos = height + hdrtop + offset;
116: \$('.LC_iframecontainer').css('top', pos);
117: });
118: });
119: window.onload = function(){ \$(window).trigger('resize') };
120: SCRIPT
121: # javascript will position the iframe if window was resized (or zoomed)
122: return <<ENDFRAME;
123: $startpage
124: $script
125: <div class="LC_iframecontainer">
126: <iframe src="$url">$lt{'noif'} $noiframe</iframe>
127: </div>
128: $endpage
129: ENDFRAME
130: }
131: }
132:
133: sub handler {
134: my $r=shift;
135: &Apache::loncommon::content_type($r,'text/html');
136: $r->send_http_header;
137:
138: return OK if $r->header_only;
139:
140: my $url = $r->uri;
141: my ($is_ext,$brcrum,$absolute,$is_pdf);
142:
143: for ($url){
144: s|^/adm/wrapper||;
145: $is_ext = $_ =~ s|^/ext/|http://|;
146: s|http://https://|https://|;
147: s|:|:|g;
148: }
149:
150: if ($url =~ /\.pdf$/i) {
151: $is_pdf = 1;
152: }
153:
154: if ($is_ext) {
155: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
156: ['forceedit','register','folderpath','symb','idx','title']);
157: if (($env{'form.forceedit'}) &&
158: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
159: (($env{'form.folderpath'} =~ /^supplemental/) ||
160: ($env{'form.symb'} =~ /^uploaded/))) {
161: $r->print(
162: &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
163: $env{'form.symb'},
164: $env{'form.idx'}));
165: return OK;
166: } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
167: my $crstype = &Apache::loncommon::course_type();
168: my $title = $env{'form.title'};
169: if ($title eq '') {
170: $title = &mt('External Resource');
171: }
172: $brcrum =
173: &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
174: }
175: }
176:
177: #
178: # Actual URL
179: #
180: if ($url=~/$LONCAPA::assess_re/) {
181: #
182: # This is uploaded homework
183: #
184: $env{'request.state'}='uploaded';
185: &Apache::lonhomework::renderpage($r,$url);
186: } else {
187: #
188: # This is not homework
189: #
190: if ($is_ext) {
191: $absolute = $env{'request.use_absolute'};
192: $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
193: $ENV{'QUERY_STRING'} =~ s/\&$//;
194: }
195:
196: unless ($ENV{'QUERY_STRING'} eq '') {
197: $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
198: }
199:
200: # encrypt url if not external
201: &Apache::lonenc::check_encrypt(\$url) if $url !~ /^https?\:/ ;
202:
203: $r->print( wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf) );
204:
205: } # not just the menu
206:
207: return OK;
208: } # handler
209:
210: 1;
211: __END__
212:
213: =pod
214:
215: =head1 NAME
216:
217: Apache::lonwrapper - External and binary file management.
218:
219: =head1 SYNOPSIS
220:
221: Wrapper for external and binary files as standalone resources. Edit handler for rat maps; TeX content handler.
222:
223: This is part of the LearningOnline Network with CAPA project
224: described at http://www.lon-capa.org.
225:
226: =head1 Subroutines
227:
228: =over
229:
230: =item wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$title))
231:
232: =over
233:
234: =item $url
235:
236: url to display by including in an iframe within a
237: LON-CAPA page which has a standard LON-CAPA inline menu.
238:
239: =item $brcrum
240:
241: breadcrumbs for unregistered urls
242: (i.e., external resources in Supplemental Content).
243:
244: =item $absolute
245:
246: contains protocol (http or https) followed by
247: the hostname, if menu items in the standard LON-CAPA
248: interface created by the call to loncommon::start_page()
249: within &wrapper() need to use absolute URLs rather than
250: relative URLs.
251:
252: That will be the case where an external resource has been
253: served from port 80, when the server customarily serves
254: requests using Apache/SSL (i.e., port 443). mod_rewrite
255: is used to switch requests for external resources and
256: the syllabus: /public/<domain>/<courseid>/syllabus
257: (which might also point at an external resource)
258: from https:// to http:// where the the URL of the remote site
259: specified in the resource itself is http://.
260:
261: This is done to avoid default mixed content blocking
262: in Firefox 23 and later, when serving from Apache/SSL.
263:
264: =item $is_ext
265:
266: true if URL is for an external resource.
267:
268: =item $is_pdf
269:
270: true if URL is for a PDF (based on file extension).
271:
272: =item $title
273:
274: optional. If wrapped item is a PDF, and $env{'browser.mobile'}
275: is true, a link to a PDF is shown. The "title" will be displayed
276: above the link, but if not provided as an arg, $env{'form.title'}
277: will be used, otherwise, the filename will be displayed (unless
278: hidden URL set for the resource).
279:
280: =back
281:
282: Returns markup for the entire page.
283:
284: =item handler()
285:
286: =back
287:
288: =cut
289:
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