Annotation of rat/lonwrapper.pm, revision 1.57

1.1       www         1: # The LearningOnline Network with CAPA
                      2: # Wrapper for external and binary files as standalone resources
                      3: #
1.57    ! raeburn     4: # $Id: lonwrapper.pm,v 1.56 2017/02/07 02:07:28 raeburn Exp $
1.4       www         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: #
1.1       www        28: 
1.29      jms        29: 
1.1       www        30: package Apache::lonwrapper;
                     31: 
                     32: use strict;
                     33: use Apache::Constants qw(:common);
1.38      droeschl   34: use Apache::lonenc();
1.18      albertel   35: use Apache::lonnet;
1.42      raeburn    36: use Apache::lonlocal;
                     37: use Apache::loncommon();
                     38: use Apache::lonhtmlcommon();
                     39: use Apache::lonextresedit();
1.50      raeburn    40: use Apache::lonexttool();
                     41: use LONCAPA qw(:DEFAULT :match);;
1.1       www        42: 
                     43: # ================================================================ Main Handler
1.21      albertel   44: sub wrapper {
1.50      raeburn    45:     my ($url,$brcrum,$absolute,$is_ext,$is_pdf,$exttool,$title) = @_;
1.23      albertel   46: 
1.42      raeburn    47:     my $forcereg;
                     48:     unless ($env{'form.folderpath'}) {
                     49:         $forcereg = 1;
                     50:     }
1.46      raeburn    51:     my %lt = &Apache::lonlocal::texthash(
                     52:                                           'noif' => 'No iframe support.',
                     53:                                           'show' => 'Show content in pop-up window',
                     54:                                         );
                     55: 
1.51      raeburn    56:     my $anchor;
1.53      raeburn    57:     if ($is_ext) {
                     58:         if ($env{'form.symb'}) {
                     59:             (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
                     60:             if ($res =~ /(#[^#]+)$/) {
                     61:                 $anchor = $1;
                     62:             }
                     63:         } elsif ($env{'form.anchor'} ne '') {
                     64:             $anchor = '#'.$env{'form.anchor'};
1.51      raeburn    65:         }
                     66:     }
                     67: 
                     68:     my $noiframe = &Apache::loncommon::modal_link($url.$anchor,$lt{'show'},500,400);
1.42      raeburn    69:     my $args = {'bgcolor' => '#FFFFFF'};
                     70:     if ($forcereg) {
                     71:         $args->{'force_register'} = $forcereg;
                     72:     }
                     73:     if (ref($brcrum) eq 'ARRAY') {
1.45      raeburn    74:         $args->{'bread_crumbs'} = $brcrum;
1.42      raeburn    75:     }
1.44      raeburn    76:     if ($absolute) {
1.57    ! raeburn    77:         $args->{'use_absolute'} = $absolute;
1.44      raeburn    78:     }
1.56      raeburn    79:     if ($env{'form.only_body'}) {
                     80:         $args->{'only_body'} = $env{'form.only_body'};
                     81:     }
1.42      raeburn    82: 
1.46      raeburn    83:     my $startpage = &Apache::loncommon::start_page('Menu',undef,$args);
                     84:     my $endpage = &Apache::loncommon::end_page();
1.50      raeburn    85:     
                     86:     if (($env{'browser.mobile'}) || ($exttool eq 'window')) {
1.47      raeburn    87:         my $output = $startpage;
                     88:         if ($is_pdf) {
                     89:             if ($title eq '') {
1.49      raeburn    90:                 $title = $env{'form.title'};
                     91:                 if ($title eq '') {
                     92:                     unless ($env{'request.enc'}) {
                     93:                         ($title) = ($url =~ m{/([^/]+)$});
                     94:                         $title =~ s/(\?[^\?]+)$//;
                     95:                     }
1.47      raeburn    96:                 }
                     97:             }
                     98:             unless ($title eq '') {
                     99:                 $output .= $title.'<br />';
                    100:             }
                    101:             $output .= '<a href="'.$url.'">'.&mt('Link to PDF (for mobile devices)').'</a>';
1.50      raeburn   102:         } elsif ($exttool eq 'window') {
                    103:             $output .= '<div>'.
                    104:                        '<a href="'.$url.'" target="LC_LTI" style="padding:0;clear:both;margin:0;border:0">'.
                    105:                        &mt('Launch External Tool').'</a>'.
                    106:                        '</div>';
1.47      raeburn   107:         } else {
                    108:             $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
1.51      raeburn   109:                        '<iframe src="'.$url.$anchor.'" height="100%" width="100%" frameborder="0">'."\n".
1.47      raeburn   110:                        "$lt{'noif'} $noiframe\n".
                    111:                        "</iframe>\n".
                    112:                        "</div>\n";
                    113:         }
                    114:         $output .= $endpage;
                    115:         return $output;
1.46      raeburn   116:     } else {
1.55      raeburn   117:         my $offset = 5;
                    118:         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['inhibitmenu']);
                    119:         if ($env{'form.inhibitmenu'} eq 'yes') {
                    120:             $offset = 0;
                    121:         }
1.46      raeburn   122:         my $script = &Apache::lonhtmlcommon::scripttag(<<SCRIPT);
                    123:         \$(document).ready( function() {
                    124:             \$(window).unbind('resize').resize(function(){
1.54      damieng   125:                 var header = null;
1.55      raeburn   126:                 var offset = $offset;
1.46      raeburn   127:                 var height = 0;
                    128:                 var hdrtop = 0;
                    129:                 if (\$('div.LC_head_subbox:first').length) {
                    130:                     header = \$('div.LC_head_subbox:first');
                    131:                     offset = 9;
                    132:                 } else {
                    133:                     if (\$('#LC_breadcrumbs').length) {
                    134:                         header = \$('#LC_breadcrumbs');
                    135:                     }
                    136:                 }
1.54      damieng   137:                 if (header != null && header.length) {
1.46      raeburn   138:                     height = header.height();
                    139:                     hdrtop = header.position().top;
1.42      raeburn   140:                 }
1.46      raeburn   141:                 var pos = height + hdrtop + offset;
                    142:                 \$('.LC_iframecontainer').css('top', pos);
                    143:             });
1.38      droeschl  144:         });
1.46      raeburn   145:         window.onload = function(){  \$(window).trigger('resize') };
1.39      droeschl  146: SCRIPT
1.46      raeburn   147:         # javascript will position the iframe if window was resized (or zoomed)
                    148:         return <<ENDFRAME;
                    149:         $startpage
                    150:         $script
                    151:         <div class="LC_iframecontainer">
1.51      raeburn   152:             <iframe src="$url$anchor">$lt{'noif'} $noiframe</iframe>
1.46      raeburn   153:         </div>
                    154:         $endpage
1.38      droeschl  155: ENDFRAME
1.46      raeburn   156:     }
1.21      albertel  157: }
                    158: 
                    159: sub handler {
                    160:     my $r=shift;
                    161:     &Apache::loncommon::content_type($r,'text/html');
                    162:     $r->send_http_header;
                    163: 
                    164:     return OK if $r->header_only;
                    165: 
1.38      droeschl  166:     my $url = $r->uri;
1.50      raeburn   167:     my ($is_ext,$brcrum,$absolute,$is_pdf,$exttool,$cdom,$cnum);
1.38      droeschl  168: 
                    169:     for ($url){
                    170:         s|^/adm/wrapper||;
                    171:         $is_ext = $_ =~ s|^/ext/|http://|;         
                    172:         s|http://https://|https://|;
                    173:         s|&colon;|:|g;              
1.21      albertel  174:     }
                    175: 
1.50      raeburn   176: 
1.47      raeburn   177:     if ($url =~ /\.pdf$/i) {
                    178:         $is_pdf = 1;
1.50      raeburn   179:     } elsif ($url =~ m{^/adm/($match_domain)/($match_courseid)/(\d+)/exttools?$}) {
                    180:         $cdom = $1;
                    181:         $cnum = $2;
                    182:         my $marker = $3;
                    183:         $exttool = 'iframe';
                    184:         my %toolhash = &Apache::lonnet::get('exttool_'.$marker,['target'],$cdom,$cnum);
                    185:         if ($toolhash{'target'} eq 'window') {
                    186:            $exttool = 'window'; 
                    187:         }
1.47      raeburn   188:     }
1.50      raeburn   189:     if (($is_ext) || ($exttool)) {
1.42      raeburn   190:         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.53      raeburn   191:             ['forceedit','register','folderpath','symb','idx','title','anchor']);
1.42      raeburn   192:         if (($env{'form.forceedit'}) &&
                    193:             (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
                    194:             (($env{'form.folderpath'} =~ /^supplemental/) ||
                    195:              ($env{'form.symb'} =~ /^uploaded/))) {
1.53      raeburn   196:             if ($env{'form.symb'}) {
                    197:                 (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
                    198:                 if ($res =~ /(#[^#]+)$/) {
                    199:                     $url .= $1;
                    200:                 }
                    201:             } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
                    202:                 if ($env{'form.anchor'} ne '') {
                    203:                     $url .= '#'.$env{'form.anchor'};
                    204:                 }
1.52      raeburn   205:             }
1.50      raeburn   206:             my $type = 'ext';
                    207:             my %ltitools;
                    208:             if ($exttool) {
                    209:                 $type = 'tool';
                    210:                 %ltitools = &Apache::lonnet::get_domain_ltitools($cdom);
                    211:             }
1.42      raeburn   212:             $r->print(
                    213:                 &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
                    214:                                                        $env{'form.symb'},
1.50      raeburn   215:                                                        $env{'form.idx'},$type,$cdom,
                    216:                                                        $cnum,\%ltitools));
1.42      raeburn   217:             return OK;
                    218:         } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
                    219:             my $crstype = &Apache::loncommon::course_type();
1.43      raeburn   220:             my $title = $env{'form.title'};
                    221:             if ($title eq '') {
1.50      raeburn   222:                 if ($is_ext) {
                    223:                     $title = &mt('External Resource');
                    224:                 } else {
                    225:                     $title = &mt('External Tool');
                    226:                 }
1.43      raeburn   227:             }
1.42      raeburn   228:             $brcrum =
1.43      raeburn   229:                 &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
1.42      raeburn   230:         }
                    231:     }
                    232: 
1.21      albertel  233: #
                    234: # Actual URL
                    235: #
1.41      www       236:     if ($url=~/$LONCAPA::assess_re/) {
1.21      albertel  237: #
                    238: # This is uploaded homework
                    239: #
1.38      droeschl  240:         $env{'request.state'}='uploaded';
                    241:         &Apache::lonhomework::renderpage($r,$url);
1.21      albertel  242:     } else {
                    243: #
                    244: # This is not homework
                    245: #
1.50      raeburn   246:         if (($is_ext) || ($exttool)) {
1.49      raeburn   247:             $absolute = $env{'request.use_absolute'};
1.38      droeschl  248:             $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
1.42      raeburn   249:             $ENV{'QUERY_STRING'} =~ s/\&$//;
1.38      droeschl  250:         }
                    251: 
1.35      raeburn   252:         unless ($ENV{'QUERY_STRING'} eq '') {
1.38      droeschl  253:             $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
1.35      raeburn   254:         }
1.38      droeschl  255: 
                    256:         # encrypt url if not external
1.50      raeburn   257:         unless ($is_ext || $exttool) {
                    258:             &Apache::lonenc::check_encrypt(\$url);
                    259:         }
1.38      droeschl  260: 
1.50      raeburn   261:         $r->print( wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$exttool) );
1.38      droeschl  262: 
1.21      albertel  263:     } # not just the menu
1.38      droeschl  264:     
1.21      albertel  265:     return OK;
1.13      www       266: } # handler
1.1       www       267: 
                    268: 1;
                    269: __END__
                    270: 
1.30      jms       271: =pod
1.1       www       272: 
1.30      jms       273: =head1 NAME
                    274: 
                    275: Apache::lonwrapper - External and binary file management.
                    276: 
                    277: =head1 SYNOPSIS
                    278: 
                    279: Wrapper for external and binary files as standalone resources. Edit handler for rat maps; TeX content handler.
                    280: 
                    281: This is part of the LearningOnline Network with CAPA project
                    282: described at http://www.lon-capa.org.
                    283: 
                    284: =head1 Subroutines
                    285: 
                    286: =over
                    287: 
1.49      raeburn   288: =item wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$title))
1.30      jms       289: 
1.45      raeburn   290: =over
                    291: 
1.46      raeburn   292: =item $url
                    293: 
1.45      raeburn   294: url to display by including in an iframe within a
                    295: LON-CAPA page which has a standard LON-CAPA inline menu.
                    296: 
                    297: =item $brcrum
                    298: 
                    299: breadcrumbs for unregistered urls
1.42      raeburn   300: (i.e., external resources in Supplemental Content).
1.45      raeburn   301: 
1.46      raeburn   302: =item $absolute
1.45      raeburn   303: 
                    304: contains protocol (http or https) followed by
                    305: the hostname, if menu items in the standard LON-CAPA
                    306: interface created by the call to loncommon::start_page()
                    307: within &wrapper() need to use absolute URLs rather than
                    308: relative URLs.
                    309: 
                    310: That will be the case where an external resource has been 
                    311: served from port 80, when the server customarily serves
                    312: requests using Apache/SSL (i.e., port 443). mod_rewrite 
1.49      raeburn   313: is used to switch requests for external resources and
                    314: the syllabus: /public/<domain>/<courseid>/syllabus
                    315: (which might also point at an external resource)
1.45      raeburn   316: from https:// to http:// where the the URL of the remote site 
                    317: specified in the resource itself is http://.
                    318: 
                    319: This is done to avoid default mixed content blocking
                    320: in Firefox 23 and later, when serving from Apache/SSL.
                    321: 
                    322: =item $is_ext
                    323: 
                    324: true if URL is for an external resource.
                    325: 
1.47      raeburn   326: =item $is_pdf
                    327: 
                    328: true if URL is for a PDF (based on file extension).
                    329: 
1.49      raeburn   330: =item $title
                    331: 
                    332: optional. If wrapped item is a PDF, and $env{'browser.mobile'} 
                    333: is true, a link to a PDF is shown. The "title" will be displayed
                    334: above the link, but if not provided as an arg, $env{'form.title'}
                    335: will be used, otherwise, the filename will be displayed (unless
                    336: hidden URL set for the resource).
                    337: 
1.45      raeburn   338: =back
                    339: 
1.38      droeschl  340: Returns markup for the entire page.
1.30      jms       341: 
                    342: =item handler()
                    343: 
                    344: =back
                    345: 
                    346: =cut
1.1       www       347: 

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