1: # The LearningOnline Network
2: # Opening converted problems and directory listings for Daxe
3: #
4: # $Id: daxeopen.pm,v 1.1 2015/12/03 20:40:27 damieng 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::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, $request);
54: } else {
55: # Apache should send other files directly
56: return HTTP_NOT_ACCEPTABLE;
57: }
58: }
59:
60: sub convert_problem {
61: my ($uri, $request) = @_;
62:
63: my $file = &Apache::lonnet::filelocation('', $uri);
64: &Apache::lonnet::repcopy($file);
65: if (! -e $file) {
66: return HTTP_NOT_FOUND;
67: }
68: try {
69: my $warnings = 0; # no warning printed
70: my $textref = &Apache::pre_xml::pre_xml($file, $warnings);
71: $textref = &Apache::html_to_xml::html_to_xml($textref, $warnings);
72: my $text = &Apache::post_xml::post_xml($textref, $file, $warnings);
73: &Apache::loncommon::content_type($request, 'text/xml', 'utf-8');
74: $request->print($text);
75: return OK;
76: } catch {
77: die "convert failed for $file: $_";
78: #$request->print('<?xml version="1.0" encoding="UTF-8"?>'."\n");
79: #$request->print("<problem>\n");
80: #$request->print("convert failed for $file: $_");
81: #$request->print("</problem>\n");
82: #return OK;
83: };
84: }
85:
86: sub directory_listing {
87: my ($uri, $request) = @_;
88: my $dirpath = &Apache::lonnet::filelocation('', $uri);
89: if (! -e $dirpath) {
90: return HTTP_NOT_FOUND;
91: }
92: $dirpath =~ s/\/$//;
93: opendir my $dir, $dirpath or die "Cannot open directory: $dirpath";
94: my @files = readdir $dir;
95: closedir $dir;
96: my $res = '<?xml version="1.0" encoding="UTF-8"?>'."\n";
97: my $dirname = $dirpath;
98: $dirname =~ s/^.*\/([^\/]*)$/$1/;
99: $res .= "<directory name=\"$dirname\">\n";
100: foreach my $name (@files) {
101: if ($name eq '.' || $name eq '..') {
102: next;
103: }
104: if ($name =~ /\.(bak|log|meta|save)$/) {
105: next;
106: }
107: $sb = stat($dirpath.'/'.$name);
108: my $mode = $sb->mode;
109: if (S_ISDIR($mode)) {
110: $res .= "<directory name=\"$name\"/>\n";
111: } else {
112: $res .= "<file name=\"$name\"";
113: my $size = $sb->size; # total size of file, in bytes
114: $res .= " size=\"$size\"";
115: my $mtime = $sb->mtime; # last modify time in seconds since the epoch
116: my $dt = DateTime->from_epoch(epoch => $mtime);
117: my $modified = $dt->iso8601().'Z';
118: $res .= " modified=\"$modified\"";
119: $res .= "/>\n";
120: }
121: }
122: $res .= "</directory>\n";
123: &Apache::loncommon::content_type($request, 'text/xml', 'utf-8');
124: $request->print($res);
125: return OK;
126: }
127:
128: # NOTE: binaries should be sent directly be Apache
129: # sub send_binary {
130: # my ($request, $filepath) = @_;
131: #
132: # $buffer = '';
133: # if (!open(FILE, "<", $filepath)) {
134: # return HTTP_NOT_FOUND;
135: # }
136: # binmode(FILE);
137: #
138: # # Read file in 32K blocks
139: # while ((read(FILE, $buffer, 32768)) != 0) {
140: # $request->print($buffer);
141: # }
142: #
143: # if (!close(FILE)) {
144: # &Apache::lonnet::logthis("Error closing the file $filepath");
145: # }
146: # return OK;
147: # }
148:
149: 1;
150: __END__
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