1: # The LearningOnline Network with CAPA
2: # Wrapper for external and binary files as standalone resources
3: #
4: # $Id: lonwrapper.pm,v 1.63 2017/05/10 13:49:21 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: 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,$linktext,$explanation,
46: $title,$width,$height) = @_;
47:
48: my $forcereg;
49: unless ($env{'form.folderpath'}) {
50: $forcereg = 1;
51: }
52: my %lt = &Apache::lonlocal::texthash(
53: 'noif' => 'No iframe support.',
54: 'show' => 'Show content in pop-up window',
55: );
56:
57: my $anchor;
58: if ($is_ext) {
59: if ($env{'form.symb'}) {
60: (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
61: if ($res =~ /(#[^#]+)$/) {
62: $anchor = $1;
63: }
64: } elsif ($env{'form.anchor'} ne '') {
65: $anchor = '#'.$env{'form.anchor'};
66: }
67: }
68:
69: my $noiframe = &Apache::loncommon::modal_link($url.$anchor,$lt{'show'},500,400);
70: my $args = {'bgcolor' => '#FFFFFF'};
71: if ($forcereg) {
72: $args->{'force_register'} = $forcereg;
73: }
74: if (ref($brcrum) eq 'ARRAY') {
75: $args->{'bread_crumbs'} = $brcrum;
76: }
77: if ($absolute) {
78: $args->{'use_absolute'} = $absolute;
79: }
80: if ($env{'form.only_body'}) {
81: $args->{'only_body'} = $env{'form.only_body'};
82: }
83:
84: my $startpage = &Apache::loncommon::start_page('Menu',undef,$args);
85: my $endpage = &Apache::loncommon::end_page();
86:
87: if (($env{'browser.mobile'}) || ($exttool eq 'window') || ($exttool eq 'tab')) {
88: my $output = $startpage;
89: if ($is_pdf) {
90: if ($title eq '') {
91: $title = $env{'form.title'};
92: if ($title eq '') {
93: unless ($env{'request.enc'}) {
94: ($title) = ($url =~ m{/([^/]+)$});
95: $title =~ s/(\?[^\?]+)$//;
96: }
97: }
98: }
99: unless ($title eq '') {
100: $output .= $title.'<br />';
101: }
102: $output .= '<a href="'.$url.'">'.&mt('Link to PDF (for mobile devices)').'</a>';
103: } elsif (($exttool eq 'window') || ($exttool eq 'tab')) {
104: if ($linktext eq '') {
105: $linktext = &mt('Launch External Tool');
106: }
107: if ($exttool eq 'tab') {
108: $output .= '<div>'.
109: '<a href="'.$url.'" target="LCExternalToolTab" style="padding:0;clear:both;margin:0;border:0">'.
110: $linktext.'</a>'.
111: '</div>';
112: } else {
113: $output .= <<"ENDLINK";
114: <script type="text/javascript">
115: var windowObjectReference = null;
116: var PreviousUrl;
117:
118: function openSinglePopup(strUrl) {
119: if (windowObjectReference == null || windowObjectReference.closed) {
120: windowObjectReference = window.open(strUrl, "LCExternalToolPopUp",
121: "height=$height,width=$width,scrollbars=yes,resizable=yes,status=yes,menubar=no,location=no'");
122: } else if(PreviousUrl != strUrl) {
123: windowObjectReference = window.open(strUrl, "LCExternalToolPopUp",
124: "height=$height,width=$width,scrollbars=yes,resizable=yes,status=yes,menubar=no,location=no'");
125: windowObjectReference.focus();
126: } else {
127: windowObjectReference.focus();
128: };
129: PreviousUrl = strUrl;
130: }
131: </script>
132: <div>
133: <a href="$url" target="LCExternalToolPopUp" onclick="openSinglePopup(this.href); return false;">
134: $linktext</a>
135: </div>
136: ENDLINK
137: }
138: if ($explanation ne '') {
139: $output .= '<div>'.$explanation.'</div>';
140: }
141: } else {
142: $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
143: '<iframe src="'.$url.$anchor.'" height="100%" width="100%" frameborder="0">'."\n".
144: "$lt{'noif'} $noiframe\n".
145: "</iframe>\n".
146: "</div>\n";
147: }
148: $output .= $endpage;
149: return $output;
150: } else {
151: my $offset = 5;
152: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['inhibitmenu']);
153: if ($env{'form.inhibitmenu'} eq 'yes') {
154: $offset = 0;
155: }
156: my $script = &Apache::lonhtmlcommon::scripttag(<<SCRIPT);
157: \$(document).ready( function() {
158: \$(window).unbind('resize').resize(function(){
159: var header = null;
160: var offset = $offset;
161: var height = 0;
162: var hdrtop = 0;
163: if (\$('div.LC_head_subbox:first').length) {
164: header = \$('div.LC_head_subbox:first');
165: offset = 9;
166: } else {
167: if (\$('#LC_breadcrumbs').length) {
168: header = \$('#LC_breadcrumbs');
169: }
170: }
171: if (header != null && header.length) {
172: height = header.height();
173: hdrtop = header.position().top;
174: }
175: var pos = height + hdrtop + offset;
176: \$('.LC_iframecontainer').css('top', pos);
177: });
178: });
179: window.onload = function(){ \$(window).trigger('resize') };
180: SCRIPT
181: # javascript will position the iframe if window was resized (or zoomed)
182: return <<ENDFRAME;
183: $startpage
184: $script
185: <div class="LC_iframecontainer">
186: <iframe src="$url$anchor">$lt{'noif'} $noiframe</iframe>
187: </div>
188: $endpage
189: ENDFRAME
190: }
191: }
192:
193: sub handler {
194: my $r=shift;
195: &Apache::loncommon::content_type($r,'text/html');
196: $r->send_http_header;
197:
198: return OK if $r->header_only;
199:
200: my $url = $r->uri;
201: my ($is_ext,$brcrum,$absolute,$is_pdf,$exttool,$cdom,$cnum,$hostname,
202: $linktext,$explanation,$width,$height);
203:
204: for ($url){
205: s|^/adm/wrapper||;
206: $is_ext = $_ =~ s|^/ext/|http://|;
207: s|http://https://|https://|;
208: s|:|:|g;
209: }
210:
211:
212: if ($url =~ /\.pdf$/i) {
213: $is_pdf = 1;
214: } elsif ($url =~ m{^/adm/($match_domain)/($match_courseid)/(\d+)/ext\.tool$}) {
215: $cdom = $1;
216: $cnum = $2;
217: my $marker = $3;
218: $exttool = 'iframe';
219: my $exttoolremote;
220: my %toolhash = &Apache::lonnet::get('exttool_'.$marker,['target','linktext','explanation','id','width','height'],
221: $cdom,$cnum);
222: if ($toolhash{'id'}) {
223: my %ltitools = &Apache::lonnet::get_domain_ltitools($cdom);
224: if (ref($ltitools{$toolhash{'id'}}) eq 'HASH') {
225: $exttoolremote = $ltitools{$toolhash{'id'}}{'url'};
226: }
227: }
228: if ($toolhash{'target'} eq 'window') {
229: $exttool = 'window';
230: $width = $toolhash{'width'};
231: $height = $toolhash{'height'};
232: } elsif ($toolhash{'target'} eq 'tab') {
233: $exttool = 'tab';
234: }
235: if (($exttool eq 'window') || ($exttool eq 'tab')) {
236: $linktext = $toolhash{'linktext'};
237: $explanation = $toolhash{'explanation'};
238: } elsif (($exttoolremote =~ /^http:/) && ($ENV{'SERVER_PORT'} == 443)) {
239: $exttool = 'tab';
240: }
241: }
242: if (($is_ext) || ($exttool)) {
243: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
244: ['forceedit','register','folderpath','symb','idx','title','anchor']);
245: if (($env{'form.forceedit'}) &&
246: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
247: (($env{'form.folderpath'} =~ /^supplemental/) ||
248: ($env{'form.symb'} =~ /^uploaded/))) {
249: if ($env{'form.symb'}) {
250: (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
251: if ($res =~ /(#[^#]+)$/) {
252: $url .= $1;
253: }
254: } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
255: if ($env{'form.anchor'} ne '') {
256: $url .= '#'.$env{'form.anchor'};
257: }
258: }
259: my $type = 'ext';
260: if ($exttool) {
261: $type = 'tool';
262: } elsif (($url =~ /^http:/) && ($ENV{'SERVER_PORT'} == 443)) {
263: $hostname = $r->hostname();
264: }
265: $r->print(
266: &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
267: $env{'form.symb'},
268: $env{'form.idx'},$type,$cdom,
269: $cnum,$hostname));
270: return OK;
271: } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
272: my $crstype = &Apache::loncommon::course_type();
273: my $title = $env{'form.title'};
274: if ($title eq '') {
275: if ($is_ext) {
276: $title = &mt('External Resource');
277: } else {
278: $title = &mt('External Tool');
279: }
280: }
281: $brcrum =
282: &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
283: }
284: }
285:
286: #
287: # Actual URL
288: #
289: if (($url=~/$LONCAPA::assess_re/) && (!$exttool)) {
290: #
291: # This is uploaded homework
292: #
293: $env{'request.state'}='uploaded';
294: &Apache::lonhomework::renderpage($r,$url);
295: } else {
296: #
297: # This is not homework
298: #
299: if (($is_ext) || ($exttool)) {
300: $absolute = $env{'request.use_absolute'};
301: $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
302: $ENV{'QUERY_STRING'} =~ s/\&$//;
303: }
304:
305: unless ($ENV{'QUERY_STRING'} eq '') {
306: $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
307: }
308:
309: # encrypt url if not external
310: unless ($is_ext) {
311: &Apache::lonenc::check_encrypt(\$url);
312: }
313:
314: $r->print( wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$exttool,
315: $linktext,$explanation,undef,$width,$height) );
316:
317: } # not just the menu
318:
319: return OK;
320: } # handler
321:
322: 1;
323: __END__
324:
325: =pod
326:
327: =head1 NAME
328:
329: Apache::lonwrapper - External and binary file management.
330:
331: =head1 SYNOPSIS
332:
333: Wrapper for external and binary files as standalone resources. Edit handler for rat maps; TeX content handler.
334:
335: This is part of the LearningOnline Network with CAPA project
336: described at http://www.lon-capa.org.
337:
338: =head1 Subroutines
339:
340: =over
341:
342: =item wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$title))
343:
344: =over
345:
346: =item $url
347:
348: url to display by including in an iframe within a
349: LON-CAPA page which has a standard LON-CAPA inline menu.
350:
351: =item $brcrum
352:
353: breadcrumbs for unregistered urls
354: (i.e., external resources in Supplemental Content).
355:
356: =item $absolute
357:
358: contains protocol (http or https) followed by
359: the hostname, if menu items in the standard LON-CAPA
360: interface created by the call to loncommon::start_page()
361: within &wrapper() need to use absolute URLs rather than
362: relative URLs.
363:
364: That will be the case where an external resource has been
365: served from port 80, when the server customarily serves
366: requests using Apache/SSL (i.e., port 443). mod_rewrite
367: is used to switch requests for external resources and
368: the syllabus: /public/<domain>/<courseid>/syllabus
369: (which might also point at an external resource)
370: from https:// to http:// where the the URL of the remote site
371: specified in the resource itself is http://.
372:
373: This is done to avoid default mixed content blocking
374: in Firefox 23 and later, when serving from Apache/SSL.
375:
376: =item $is_ext
377:
378: true if URL is for an external resource.
379:
380: =item $is_pdf
381:
382: true if URL is for a PDF (based on file extension).
383:
384: =item $title
385:
386: optional. If wrapped item is a PDF, and $env{'browser.mobile'}
387: is true, a link to a PDF is shown. The "title" will be displayed
388: above the link, but if not provided as an arg, $env{'form.title'}
389: will be used, otherwise, the filename will be displayed (unless
390: hidden URL set for the resource).
391:
392: =back
393:
394: Returns markup for the entire page.
395:
396: =item handler()
397:
398: =back
399:
400: =cut
401:
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