1: # The LearningOnline Network with CAPA
2: # Wrapper for external and binary files as standalone resources
3: #
4: # $Id: lonwrapper.pm,v 1.45 2013/10/15 10:17:19 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) = @_;
44:
45: my $forcereg;
46: unless ($env{'form.folderpath'}) {
47: $forcereg = 1;
48: }
49:
50: my $args = {'bgcolor' => '#FFFFFF'};
51: if ($forcereg) {
52: $args->{'force_register'} = $forcereg;
53: }
54: if (ref($brcrum) eq 'ARRAY') {
55: $args->{'bread_crumbs'} = $brcrum;
56: }
57: if ($absolute) {
58: $args->{'use_absolute'} = $absolute;
59: }
60:
61: my $startpage = Apache::loncommon::start_page('Menu',undef,$args);
62: my $endpage = Apache::loncommon::end_page();
63:
64: my $script = Apache::lonhtmlcommon::scripttag(<<SCRIPT );
65: \$(document).ready( function() {
66: \$(window).unbind('resize').resize(function(){
67: var header;
68: var offset = 5;
69: var height = 0;
70: var hdrtop = 0;
71: if (\$('div.LC_head_subbox:first').length) {
72: header = \$('div.LC_head_subbox:first');
73: offset = 9;
74: } else {
75: if (\$('#LC_breadcrumbs').length) {
76: header = \$('#LC_breadcrumbs');
77: }
78: }
79: if (header.length) {
80: height = header.height();
81: hdrtop = header.position().top;
82: }
83: var pos = height + hdrtop + offset;
84: \$('.LC_iframecontainer').css('top', pos);
85: });
86: });
87: window.onload = function(){ \$(window).trigger('resize') };
88: SCRIPT
89:
90: # javascript will position the iframe if window was resized (or zoomed)
91: return <<ENDFRAME;
92: $startpage
93: $script
94: <div class="LC_iframecontainer">
95: <iframe src="$url">No iframe support!</iframe>
96: </div>
97: $endpage
98: ENDFRAME
99: }
100:
101: sub handler {
102: my $r=shift;
103: &Apache::loncommon::content_type($r,'text/html');
104: $r->send_http_header;
105:
106: return OK if $r->header_only;
107:
108: my $url = $r->uri;
109: my ($is_ext,$brcrum,$absolute);
110:
111: for ($url){
112: s|^/adm/wrapper||;
113: $is_ext = $_ =~ s|^/ext/|http://|;
114: s|http://https://|https://|;
115: s|:|:|g;
116: }
117:
118: if ($is_ext) {
119: my $hostname = $r->hostname();
120: my $lonhost = &Apache::lonnet::host_from_dns($hostname);
121: if ($lonhost) {
122: my $actual = &Apache::lonnet::absolute_url($hostname);
123: my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
124: unless ($actual eq $expected) {
125: $absolute = $expected;
126: }
127: }
128: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
129: ['forceedit','register','folderpath','symb','idx','title']);
130: if (($env{'form.forceedit'}) &&
131: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
132: (($env{'form.folderpath'} =~ /^supplemental/) ||
133: ($env{'form.symb'} =~ /^uploaded/))) {
134: $r->print(
135: &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
136: $env{'form.symb'},
137: $env{'form.idx'}));
138: return OK;
139: } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
140: my $crstype = &Apache::loncommon::course_type();
141: my $title = $env{'form.title'};
142: if ($title eq '') {
143: $title = &mt('External Resource');
144: }
145: $brcrum =
146: &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
147: }
148: }
149:
150: #
151: # Actual URL
152: #
153: if ($url=~/$LONCAPA::assess_re/) {
154: #
155: # This is uploaded homework
156: #
157: $env{'request.state'}='uploaded';
158: &Apache::lonhomework::renderpage($r,$url);
159: } else {
160: #
161: # This is not homework
162: #
163: if ($is_ext) {
164: $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
165: $ENV{'QUERY_STRING'} =~ s/\&$//;
166: }
167:
168: unless ($ENV{'QUERY_STRING'} eq '') {
169: $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
170: }
171:
172: # encrypt url if not external
173: &Apache::lonenc::check_encrypt(\$url) if $url !~ /^https?\:/ ;
174:
175: $r->print( wrapper($url,$brcrum,$absolute,$is_ext) );
176:
177: } # not just the menu
178:
179: return OK;
180: } # handler
181:
182: 1;
183: __END__
184:
185: =pod
186:
187: =head1 NAME
188:
189: Apache::lonwrapper - External and binary file management.
190:
191: =head1 SYNOPSIS
192:
193: Wrapper for external and binary files as standalone resources. Edit handler for rat maps; TeX content handler.
194:
195: This is part of the LearningOnline Network with CAPA project
196: described at http://www.lon-capa.org.
197:
198: =head1 Subroutines
199:
200: =over
201:
202: =item wrapper($url,$brcrum,$absolute,$is_ext)
203:
204: =over
205:
206: =item $url
207:
208: url to display by including in an iframe within a
209: LON-CAPA page which has a standard LON-CAPA inline menu.
210:
211: =item $brcrum
212:
213: breadcrumbs for unregistered urls
214: (i.e., external resources in Supplemental Content).
215:
216: =item $absolute
217:
218: contains protocol (http or https) followed by
219: the hostname, if menu items in the standard LON-CAPA
220: interface created by the call to loncommon::start_page()
221: within &wrapper() need to use absolute URLs rather than
222: relative URLs.
223:
224: That will be the case where an external resource has been
225: served from port 80, when the server customarily serves
226: requests using Apache/SSL (i.e., port 443). mod_rewrite
227: is used to switch requests for external resources
228: from https:// to http:// where the the URL of the remote site
229: specified in the resource itself is http://.
230:
231: This is done to avoid default mixed content blocking
232: in Firefox 23 and later, when serving from Apache/SSL.
233:
234: =item $is_ext
235:
236: true if URL is for an external resource.
237:
238: =back
239:
240: Returns markup for the entire page.
241:
242: =item handler()
243:
244: =back
245:
246: =cut
247:
248:
249:
250:
251:
252:
253:
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