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Annotation of loncom/homework/daxeopen.pm, revision 1.2

1.1       damieng     1: # The LearningOnline Network
                      2: # Opening converted problems and directory listings for Daxe
                      3: #
1.2     ! damieng     4: # $Id: daxeopen.pm,v 1.1 2015/12/03 20:40:27 damieng Exp $
1.1       damieng     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::daxeopen;
                     31: 
                     32: use Apache::Constants;
                     33: use DateTime;
                     34: use Try::Tiny;
                     35: use File::stat;
                     36: use Fcntl ':mode';
                     37: 
                     38: use Apache::loncommon;
                     39: use Apache::lonnet;
                     40: use Apache::pre_xml;
                     41: use Apache::html_to_xml;
                     42: use Apache::post_xml;
                     43: 
                     44: 
                     45: sub handler {
                     46:     my $request = shift;
                     47:     my $uri = $request->uri;
                     48:     $uri =~ s/^\/daxeopen//;
                     49:     &Apache::loncommon::no_cache($request);
                     50:     if ($uri =~ /\/$/) {
                     51:         return directory_listing($uri, $request);
                     52:     } elsif ($uri =~ /\.(task|problem|exam|quiz|assess|survey|library)$/) {
                     53:         return convert_problem($uri, $request);
                     54:     } else {
                     55:         # Apache should send other files directly
1.2     ! damieng    56:         $request->status(406);
        !            57:         return OK;
1.1       damieng    58:     }
                     59: }
                     60: 
                     61: sub convert_problem {
                     62:     my ($uri, $request) = @_;
                     63:     
                     64:     my $file = &Apache::lonnet::filelocation('', $uri);
                     65:     &Apache::lonnet::repcopy($file);
                     66:     if (! -e $file) {
1.2     ! damieng    67:         $request->status(404);
        !            68:         return OK;
1.1       damieng    69:     }
                     70:     try {
                     71:         my $warnings = 0; # no warning printed
                     72:         my $textref = &Apache::pre_xml::pre_xml($file, $warnings);
                     73:         $textref = &Apache::html_to_xml::html_to_xml($textref, $warnings);
                     74:         my $text = &Apache::post_xml::post_xml($textref, $file, $warnings);
                     75:         &Apache::loncommon::content_type($request, 'text/xml', 'utf-8');
                     76:         $request->print($text);
                     77:         return OK;
                     78:     } catch {
1.2     ! damieng    79:         $request->content_type('text/plain');
        !            80:         $request->print("convert failed for $file: $_");
        !            81:         $request->status(406);
        !            82:         return OK;
1.1       damieng    83:     };
                     84: }
                     85: 
                     86: sub directory_listing {
                     87:     my ($uri, $request) = @_;
                     88:     my $dirpath = &Apache::lonnet::filelocation('', $uri);
                     89:     if (! -e $dirpath) {
1.2     ! damieng    90:         $request->status(404);
        !            91:         return OK;
1.1       damieng    92:     }
                     93:     $dirpath =~ s/\/$//;
                     94:     opendir my $dir, $dirpath or die "Cannot open directory: $dirpath";
                     95:     my @files = readdir $dir;
                     96:     closedir $dir;
                     97:     my $res = '<?xml version="1.0" encoding="UTF-8"?>'."\n";
                     98:     my $dirname = $dirpath;
                     99:     $dirname =~ s/^.*\/([^\/]*)$/$1/;
                    100:     $res .= "<directory name=\"$dirname\">\n";
                    101:     foreach my $name (@files) {
                    102:         if ($name eq '.' || $name eq '..') {
                    103:             next;
                    104:         }
                    105:         if ($name =~ /\.(bak|log|meta|save)$/) {
                    106:             next;
                    107:         }
                    108:         $sb = stat($dirpath.'/'.$name);
                    109:         my $mode = $sb->mode;
                    110:         if (S_ISDIR($mode)) {
                    111:             $res .= "<directory name=\"$name\"/>\n";
                    112:         } else {
                    113:             $res .= "<file name=\"$name\"";
                    114:             my $size = $sb->size; # total size of file, in bytes
                    115:             $res .= " size=\"$size\"";
                    116:             my $mtime = $sb->mtime; # last modify time in seconds since the epoch
                    117:             my $dt = DateTime->from_epoch(epoch => $mtime);
                    118:             my $modified = $dt->iso8601().'Z';
                    119:             $res .= " modified=\"$modified\"";
                    120:             $res .= "/>\n";
                    121:         }
                    122:     }
                    123:     $res .= "</directory>\n";
                    124:     &Apache::loncommon::content_type($request, 'text/xml', 'utf-8');
                    125:     $request->print($res);
                    126:     return OK;
                    127: }
                    128: 
                    129: 1;
                    130: __END__