1: # The LearningOnline Network with CAPA
2: # Handler to upload files into construction space
3: #
4: # $Id: lonupload.pm,v 1.10 2001/12/17 00:57:59 harris41 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: $r->print('File copied.');
160: $r->print('<p><font size=+2><a href="'.$fn.
161: '">View file</a></font>');
162: } else {
163: $r->print('Failed to copy: '.$!);
164: }
165: }
166: } else {
167: $r->print(
168: '<font size=+1 color=red>Please pick a filename</font><p>');
169: &phaseone($r,$fn,$uname,$udom);
170: }
171: } else {
172: $r->print(
173: '<font size=+1 color=red>Please pick a filename</font><p>');
174: &phaseone($r,$fn,$uname,$udom);
175: }
176: }
177:
178: # ---------------------------------------------------------------- Main Handler
179: sub handler {
180:
181: my $r=shift;
182:
183: my $uname;
184: my $udom;
185:
186: ($uname,$udom)=
187: &Apache::loncacc::constructaccess(
188: $ENV{'form.filename'},$r->dir_config('lonDefDomain'));
189: unless (($uname) && ($udom)) {
190: $r->log_reason($uname.' at '.$udom.
191: ' trying to publish file '.$ENV{'form.filename'}.
192: ' - not authorized',
193: $r->filename);
194: return HTTP_NOT_ACCEPTABLE;
195: }
196:
197: my $fn;
198:
199: if ($ENV{'form.filename'}) {
200: $fn=$ENV{'form.filename'};
201: $fn=~s/^http\:\/\/[^\/]+\/(\~|priv\/)(\w+)//;
202: } else {
203: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
204: ' unspecified filename for upload', $r->filename);
205: return HTTP_NOT_FOUND;
206: }
207:
208: # ----------------------------------------------------------- Start page output
209:
210:
211: $r->content_type('text/html');
212: $r->send_http_header;
213:
214: $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
215:
216: $r->print(
217: '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
218:
219:
220: $r->print('<h1>Upload file to Construction Space</h1>');
221:
222: if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
223: $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.
224: '</font></h3>');
225: }
226:
227:
228: if ($ENV{'form.phase'} eq 'two') {
229: &phasetwo($r,$fn,$uname,$udom);
230: } else {
231: &phaseone($r,$fn,$uname,$udom);
232: }
233:
234: $r->print('</body></html>');
235: return OK;
236: }
237:
238: 1;
239: __END__
240:
241: =head1 NAME
242:
243: Apache::lonupload - upload files into construction space
244:
245: =head1 SYNOPSIS
246:
247: Invoked by /etc/httpd/conf/srm.conf:
248:
249: <Location /adm/upload>
250: PerlAccessHandler Apache::lonacc
251: SetHandler perl-script
252: PerlHandler Apache::lonupload
253: ErrorDocument 403 /adm/login
254: ErrorDocument 404 /adm/notfound.html
255: ErrorDocument 406 /adm/unauthorized.html
256: ErrorDocument 500 /adm/errorhandler
257: </Location>
258:
259: =head1 INTRODUCTION
260:
261: This module uploads a file sitting on a client computer into
262: library server construction space.
263:
264: This is part of the LearningOnline Network with CAPA project
265: described at http://www.lon-capa.org.
266:
267: =head1 HANDLER SUBROUTINE
268:
269: This routine is called by Apache and mod_perl.
270:
271: =over 4
272:
273: =item *
274:
275: Initialize variables
276:
277: =item *
278:
279: Start page output
280:
281: =item *
282:
283: output relevant interface phase (phaseone or phasetwo)
284:
285: =item *
286:
287: (phase one is to specify upload file; phase two is to handle conditions
288: subsequent to specification--like overwriting an existing file)
289:
290: =back
291:
292: =head1 OTHER SUBROUTINES
293:
294: =over 4
295:
296: =item *
297:
298: phaseone() : Interface for specifying file to upload.
299:
300: =item *
301:
302: phasetwo() : Interface for handling post-conditions about uploading (such
303: as overwriting an existing file).
304:
305: =item *
306:
307: upfile_store() : Store contents of uploaded file into temporary space. Invoked
308: by phaseone subroutine.
309:
310: =back
311:
312: =cut
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