1:
2: # The LearningOnline Network with CAPA
3: # Handler to upload files into construction space
4: #
5: # $Id: lonupload.pm,v 1.12 2002/08/08 02:30:39 foxr Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: # (Handler to retrieve an old version of a file
30: #
31: # (Publication Handler
32: #
33: # (TeX Content Handler
34: #
35: # YEAR=2000
36: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
37: #
38: # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
39: # YEAR=2001
40: # 03/23 Guy Albertelli
41: # 03/24,03/29 Gerd Kortemeyer)
42: #
43: # 03/31,04/03 Gerd Kortemeyer)
44: #
45: # 04/05,04/09,05/25,06/23,06/24,08/22 Gerd Kortemeyer
46: # 11/29 Matthew Hall
47: # 12/16 Scott Harrison
48: #
49: ###
50:
51: package Apache::lonupload;
52:
53: use strict;
54: use Apache::File;
55: use File::Copy;
56: use Apache::Constants qw(:common :http :methods);
57: use Apache::loncacc;
58: use Apache::loncommon();
59: use Apache::Log();
60:
61: my $DEBUG=0;
62:
63: sub Debug {
64:
65: # Marshall the parameters.
66:
67: my $r = shift;
68: my $log = $r->log;
69: my $message = shift;
70:
71: # Put out the indicated message butonly if DEBUG is false.
72:
73: if ($DEBUG) {
74: $log->debug($message);
75: }
76: }
77:
78: sub upfile_store {
79: my $r=shift;
80:
81: my $fname=$ENV{'form.upfile.filename'};
82: $fname=~s/\W//g;
83:
84: chop($ENV{'form.upfile'});
85:
86: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
87: '_upload_'.$fname.'_'.time.'_'.$$;
88: {
89: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
90: '/tmp/'.$datatoken.'.tmp');
91: print $fh $ENV{'form.upfile'};
92: }
93: return $datatoken;
94: }
95:
96:
97: sub phaseone {
98: my ($r,$fn,$uname,$udom)=@_;
99: $ENV{'form.upfile.filename'}=~s/\\/\//g;
100: $ENV{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
101: if ($ENV{'form.upfile.filename'}) {
102: $fn=~s/\/[^\/]+$//;
103: $fn=~s/([^\/])$/$1\//;
104: $fn.=$ENV{'form.upfile.filename'};
105: $fn=~s/^\///;
106: $fn=~s/(\/)+/\//g;
107: $fn=~s/%20/ /g;
108: &Debug($r, "Filename for upload: $fn");
109: if (($fn) && ($fn!~/\/$/)) {
110: $r->print(
111: '<form action=/adm/upload method=post>'.
112: '<input type=hidden name=phase value=two>'.
113: '<input type=hidden name=datatoken value="'.&upfile_store.'">'.
114: 'Store uploaded file as '.
115: '<input type=text size=50 name=filename value="/priv/'.
116: $uname.'/'.$fn.'"><br>'.
117: '<input type=submit value="Store"></form>');
118: # Check for bad extension and warn user
119: if ($fn=~/\.(\w+)$/ &&
120: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
121: $r->print(
122: '<font color=red>'.
123: 'The extension on this file, "'.$1.
124: '", is reserved internally by LON-CAPA. <br \>'.
125: 'Please change the extension.'.
126: '</font>');
127: } elsif($fn=~/\.(\w+)$/ &&
128: !defined(&Apache::loncommon::fileembstyle($1))) {
129: $r->print(
130: '<font color=red>'.
131: 'The extension on this file, "'.$1.
132: '", is not recognized by LON-CAPA. <br \>'.
133: 'Please change the extension.'.
134: '</font>');
135: }
136: } else {
137: $r->print('<font color=red>Illegal filename.</font>');
138: }
139: } else {
140: $r->print('<font color=red>No upload file specified.</font>');
141: }
142: }
143:
144: sub phasetwo {
145: my ($r,$fn,$uname,$udom)=@_;
146: if ($fn=~/^\/priv\/$uname\//) {
147: my $tfn=$fn;
148: $tfn=~s/^\/(\~|priv)\/(\w+)//;
149: my $target='/home/'.$uname.'/public_html'.$tfn;
150: my $datatoken=$ENV{'form.datatoken'};
151: if (($fn) && ($datatoken)) {
152: if ((-e $target) && ($ENV{'form.override'} ne 'Yes')) {
153: $r->print(
154: '<form action=/adm/upload method=post>'.
155: 'File <tt>'.$fn.'</tt> exists. Overwrite? '.
156: '<input type=hidden name=phase value=two>'.
157: '<input type=hidden name=filename value="'.$fn.'">'.
158: '<input type=hidden name=datatoken value="'.$datatoken.'">'.
159: '<input type=submit name=override value="Yes"></form>');
160: } else {
161: my $source=$r->dir_config('lonDaemons').
162: '/tmp/'.$datatoken.'.tmp';
163: # Check for bad extension and disallow upload
164: if ($fn=~/\.(\w+)$/ &&
165: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
166: $r->print(
167: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
168: '<font color=red>'.
169: 'The extension on this file is reserved internally by LON-CAPA.'.
170: '</font>');
171: } elsif ($fn=~/\.(\w+)$/ &&
172: !defined(&Apache::loncommon::fileembstyle($1))) {
173: $r->print(
174: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
175: '<font color=red>'.
176: 'The extension on this file is not recognized by LON-CAPA.'.
177: '</font>');
178: } elsif (copy($source,$target)) {
179: chmod(0660, $target); # Set permissions to rw-rw---.
180: $r->print('File copied.');
181: $r->print('<p><font size=+2><a href="'.$fn.
182: '">View file</a></font>');
183: } else {
184: $r->print('Failed to copy: '.$!);
185: }
186: }
187: } else {
188: $r->print(
189: '<font size=+1 color=red>Please pick a filename</font><p>');
190: &phaseone($r,$fn,$uname,$udom);
191: }
192: } else {
193: $r->print(
194: '<font size=+1 color=red>Please pick a filename</font><p>');
195: &phaseone($r,$fn,$uname,$udom);
196: }
197: }
198:
199: # ---------------------------------------------------------------- Main Handler
200: sub handler {
201:
202: my $r=shift;
203:
204: my $uname;
205: my $udom;
206:
207: ($uname,$udom)=
208: &Apache::loncacc::constructaccess(
209: $ENV{'form.filename'},$r->dir_config('lonDefDomain'));
210: unless (($uname) && ($udom)) {
211: $r->log_reason($uname.' at '.$udom.
212: ' trying to publish file '.$ENV{'form.filename'}.
213: ' - not authorized',
214: $r->filename);
215: return HTTP_NOT_ACCEPTABLE;
216: }
217:
218: my $fn;
219:
220: if ($ENV{'form.filename'}) {
221: $fn=$ENV{'form.filename'};
222: $fn=~s/^http\:\/\/[^\/]+\/(\~|priv\/)(\w+)//;
223: } else {
224: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
225: ' unspecified filename for upload', $r->filename);
226: return HTTP_NOT_FOUND;
227: }
228:
229: # ----------------------------------------------------------- Start page output
230:
231:
232: $r->content_type('text/html');
233: $r->send_http_header;
234:
235: $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
236:
237: $r->print(
238: '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
239:
240:
241: $r->print('<h1>Upload file to Construction Space</h1>');
242:
243: if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
244: $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.
245: '</font></h3>');
246: }
247:
248:
249: if ($ENV{'form.phase'} eq 'two') {
250: &phasetwo($r,$fn,$uname,$udom);
251: } else {
252: &phaseone($r,$fn,$uname,$udom);
253: }
254:
255: $r->print('</body></html>');
256: return OK;
257: }
258:
259: 1;
260: __END__
261:
262: =head1 NAME
263:
264: Apache::lonupload - upload files into construction space
265:
266: =head1 SYNOPSIS
267:
268: Invoked by /etc/httpd/conf/srm.conf:
269:
270: <Location /adm/upload>
271: PerlAccessHandler Apache::lonacc
272: SetHandler perl-script
273: PerlHandler Apache::lonupload
274: ErrorDocument 403 /adm/login
275: ErrorDocument 404 /adm/notfound.html
276: ErrorDocument 406 /adm/unauthorized.html
277: ErrorDocument 500 /adm/errorhandler
278: </Location>
279:
280: =head1 INTRODUCTION
281:
282: This module uploads a file sitting on a client computer into
283: library server construction space.
284:
285: This is part of the LearningOnline Network with CAPA project
286: described at http://www.lon-capa.org.
287:
288: =head1 HANDLER SUBROUTINE
289:
290: This routine is called by Apache and mod_perl.
291:
292: =over 4
293:
294: =item *
295:
296: Initialize variables
297:
298: =item *
299:
300: Start page output
301:
302: =item *
303:
304: output relevant interface phase (phaseone or phasetwo)
305:
306: =item *
307:
308: (phase one is to specify upload file; phase two is to handle conditions
309: subsequent to specification--like overwriting an existing file)
310:
311: =back
312:
313: =head1 OTHER SUBROUTINES
314:
315: =over 4
316:
317: =item *
318:
319: phaseone() : Interface for specifying file to upload.
320:
321: =item *
322:
323: phasetwo() : Interface for handling post-conditions about uploading (such
324: as overwriting an existing file).
325:
326: =item *
327:
328: upfile_store() : Store contents of uploaded file into temporary space. Invoked
329: by phaseone subroutine.
330:
331: =back
332:
333: =cut
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