1: # The LearningOnline Network with CAPA
2: # Handler to upload files into construction space
3: #
4: # $Id: lonupload.pm,v 1.11 2002/08/05 02:22:56 foxr 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: # (Handler to retrieve an old version of a file
29: #
30: # (Publication Handler
31: #
32: # (TeX Content Handler
33: #
34: # YEAR=2000
35: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
36: #
37: # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
38: # YEAR=2001
39: # 03/23 Guy Albertelli
40: # 03/24,03/29 Gerd Kortemeyer)
41: #
42: # 03/31,04/03 Gerd Kortemeyer)
43: #
44: # 04/05,04/09,05/25,06/23,06/24,08/22 Gerd Kortemeyer
45: # 11/29 Matthew Hall
46: # 12/16 Scott Harrison
47: #
48: ###
49:
50: package Apache::lonupload;
51:
52: use strict;
53: use Apache::File;
54: use File::Copy;
55: use Apache::Constants qw(:common :http :methods);
56: use Apache::loncacc;
57: use Apache::loncommon();
58:
59: sub upfile_store {
60: my $r=shift;
61:
62: my $fname=$ENV{'form.upfile.filename'};
63: $fname=~s/\W//g;
64:
65: chop($ENV{'form.upfile'});
66:
67: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
68: '_upload_'.$fname.'_'.time.'_'.$$;
69: {
70: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
71: '/tmp/'.$datatoken.'.tmp');
72: print $fh $ENV{'form.upfile'};
73: }
74: return $datatoken;
75: }
76:
77:
78: sub phaseone {
79: my ($r,$fn,$uname,$udom)=@_;
80: $ENV{'form.upfile.filename'}=~s/\\/\//g;
81: $ENV{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
82: if ($ENV{'form.upfile.filename'}) {
83: $fn=~s/\/[^\/]+$//;
84: $fn=~s/([^\/])$/$1\//;
85: $fn.=$ENV{'form.upfile.filename'};
86: $fn=~s/^\///;
87: $fn=~s/(\/)+/\//g;
88:
89: if (($fn) && ($fn!~/\/$/)) {
90: $r->print(
91: '<form action=/adm/upload method=post>'.
92: '<input type=hidden name=phase value=two>'.
93: '<input type=hidden name=datatoken value="'.&upfile_store.'">'.
94: 'Store uploaded file as '.
95: '<input type=text size=50 name=filename value="/priv/'.
96: $uname.'/'.$fn.'"><br>'.
97: '<input type=submit value="Store"></form>');
98: # Check for bad extension and warn user
99: if ($fn=~/\.(\w+)$/ &&
100: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
101: $r->print(
102: '<font color=red>'.
103: 'The extension on this file, "'.$1.
104: '", is reserved internally by LON-CAPA. <br \>'.
105: 'Please change the extension.'.
106: '</font>');
107: } elsif($fn=~/\.(\w+)$/ &&
108: !defined(&Apache::loncommon::fileembstyle($1))) {
109: $r->print(
110: '<font color=red>'.
111: 'The extension on this file, "'.$1.
112: '", is not recognized by LON-CAPA. <br \>'.
113: 'Please change the extension.'.
114: '</font>');
115: }
116: } else {
117: $r->print('<font color=red>Illegal filename.</font>');
118: }
119: } else {
120: $r->print('<font color=red>No upload file specified.</font>');
121: }
122: }
123:
124: sub phasetwo {
125: my ($r,$fn,$uname,$udom)=@_;
126: if ($fn=~/^\/priv\/$uname\//) {
127: my $tfn=$fn;
128: $tfn=~s/^\/(\~|priv)\/(\w+)//;
129: my $target='/home/'.$uname.'/public_html'.$tfn;
130: my $datatoken=$ENV{'form.datatoken'};
131: if (($fn) && ($datatoken)) {
132: if ((-e $target) && ($ENV{'form.override'} ne 'Yes')) {
133: $r->print(
134: '<form action=/adm/upload method=post>'.
135: 'File <tt>'.$fn.'</tt> exists. Overwrite? '.
136: '<input type=hidden name=phase value=two>'.
137: '<input type=hidden name=filename value="'.$fn.'">'.
138: '<input type=hidden name=datatoken value="'.$datatoken.'">'.
139: '<input type=submit name=override value="Yes"></form>');
140: } else {
141: my $source=$r->dir_config('lonDaemons').
142: '/tmp/'.$datatoken.'.tmp';
143: # Check for bad extension and disallow upload
144: if ($fn=~/\.(\w+)$/ &&
145: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
146: $r->print(
147: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
148: '<font color=red>'.
149: 'The extension on this file is reserved internally by LON-CAPA.'.
150: '</font>');
151: } elsif ($fn=~/\.(\w+)$/ &&
152: !defined(&Apache::loncommon::fileembstyle($1))) {
153: $r->print(
154: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
155: '<font color=red>'.
156: 'The extension on this file is not recognized by LON-CAPA.'.
157: '</font>');
158: } elsif (copy($source,$target)) {
159: chmod(0660, $target); # Set permissions to rw-rw---.
160: $r->print('File copied.');
161: $r->print('<p><font size=+2><a href="'.$fn.
162: '">View file</a></font>');
163: } else {
164: $r->print('Failed to copy: '.$!);
165: }
166: }
167: } else {
168: $r->print(
169: '<font size=+1 color=red>Please pick a filename</font><p>');
170: &phaseone($r,$fn,$uname,$udom);
171: }
172: } else {
173: $r->print(
174: '<font size=+1 color=red>Please pick a filename</font><p>');
175: &phaseone($r,$fn,$uname,$udom);
176: }
177: }
178:
179: # ---------------------------------------------------------------- Main Handler
180: sub handler {
181:
182: my $r=shift;
183:
184: my $uname;
185: my $udom;
186:
187: ($uname,$udom)=
188: &Apache::loncacc::constructaccess(
189: $ENV{'form.filename'},$r->dir_config('lonDefDomain'));
190: unless (($uname) && ($udom)) {
191: $r->log_reason($uname.' at '.$udom.
192: ' trying to publish file '.$ENV{'form.filename'}.
193: ' - not authorized',
194: $r->filename);
195: return HTTP_NOT_ACCEPTABLE;
196: }
197:
198: my $fn;
199:
200: if ($ENV{'form.filename'}) {
201: $fn=$ENV{'form.filename'};
202: $fn=~s/^http\:\/\/[^\/]+\/(\~|priv\/)(\w+)//;
203: } else {
204: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
205: ' unspecified filename for upload', $r->filename);
206: return HTTP_NOT_FOUND;
207: }
208:
209: # ----------------------------------------------------------- Start page output
210:
211:
212: $r->content_type('text/html');
213: $r->send_http_header;
214:
215: $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
216:
217: $r->print(
218: '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
219:
220:
221: $r->print('<h1>Upload file to Construction Space</h1>');
222:
223: if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
224: $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.
225: '</font></h3>');
226: }
227:
228:
229: if ($ENV{'form.phase'} eq 'two') {
230: &phasetwo($r,$fn,$uname,$udom);
231: } else {
232: &phaseone($r,$fn,$uname,$udom);
233: }
234:
235: $r->print('</body></html>');
236: return OK;
237: }
238:
239: 1;
240: __END__
241:
242: =head1 NAME
243:
244: Apache::lonupload - upload files into construction space
245:
246: =head1 SYNOPSIS
247:
248: Invoked by /etc/httpd/conf/srm.conf:
249:
250: <Location /adm/upload>
251: PerlAccessHandler Apache::lonacc
252: SetHandler perl-script
253: PerlHandler Apache::lonupload
254: ErrorDocument 403 /adm/login
255: ErrorDocument 404 /adm/notfound.html
256: ErrorDocument 406 /adm/unauthorized.html
257: ErrorDocument 500 /adm/errorhandler
258: </Location>
259:
260: =head1 INTRODUCTION
261:
262: This module uploads a file sitting on a client computer into
263: library server construction space.
264:
265: This is part of the LearningOnline Network with CAPA project
266: described at http://www.lon-capa.org.
267:
268: =head1 HANDLER SUBROUTINE
269:
270: This routine is called by Apache and mod_perl.
271:
272: =over 4
273:
274: =item *
275:
276: Initialize variables
277:
278: =item *
279:
280: Start page output
281:
282: =item *
283:
284: output relevant interface phase (phaseone or phasetwo)
285:
286: =item *
287:
288: (phase one is to specify upload file; phase two is to handle conditions
289: subsequent to specification--like overwriting an existing file)
290:
291: =back
292:
293: =head1 OTHER SUBROUTINES
294:
295: =over 4
296:
297: =item *
298:
299: phaseone() : Interface for specifying file to upload.
300:
301: =item *
302:
303: phasetwo() : Interface for handling post-conditions about uploading (such
304: as overwriting an existing file).
305:
306: =item *
307:
308: upfile_store() : Store contents of uploaded file into temporary space. Invoked
309: by phaseone subroutine.
310:
311: =back
312:
313: =cut
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