1:
2: # The LearningOnline Network with CAPA
3: # Handler to upload files into construction space
4: #
5: # $Id: lonupload.pm,v 1.17 2003/07/05 10:07:12 www 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: #
48: ###
49:
50: package Apache::lonupload;
51:
52: use strict;
53: use Apache::File;
54: use File::Copy;
55: use File::Basename;
56: use Apache::Constants qw(:common :http :methods);
57: use Apache::loncacc;
58: use Apache::loncommon();
59: use Apache::Log();
60: use Apache::lonnet;
61: use HTML::Entities();
62:
63: my $DEBUG=0;
64:
65: sub Debug {
66:
67: # Marshall the parameters.
68:
69: my $r = shift;
70: my $log = $r->log;
71: my $message = shift;
72:
73: # Put out the indicated message butonly if DEBUG is false.
74:
75: if ($DEBUG) {
76: $log->debug($message);
77: }
78: }
79:
80: sub upfile_store {
81: my $r=shift;
82:
83: my $fname=$ENV{'form.upfile.filename'};
84: $fname=~s/\W//g;
85:
86: chop($ENV{'form.upfile'});
87:
88: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
89: '_upload_'.$fname.'_'.time.'_'.$$;
90: {
91: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
92: '/tmp/'.$datatoken.'.tmp');
93: print $fh $ENV{'form.upfile'};
94: }
95: return $datatoken;
96: }
97:
98:
99: sub phaseone {
100: my ($r,$fn,$uname,$udom)=@_;
101: $ENV{'form.upfile.filename'}=~s/\\/\//g;
102: $ENV{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
103: if ($ENV{'form.upfile.filename'}) {
104: $fn=~s/\/[^\/]+$//;
105: $fn=~s/([^\/])$/$1\//;
106: $fn.=$ENV{'form.upfile.filename'};
107: $fn=~s/^\///;
108: $fn=~s/(\/)+/\//g;
109:
110: # Fn is the full path to the destination filename.
111: #
112:
113: &Debug($r, "Filename for upload: $fn");
114: if (($fn) && ($fn!~/\/$/)) {
115: $r->print(
116: '<form action=/adm/upload method=post>'.
117: '<input type=hidden name=phase value=two>'.
118: '<input type=hidden name=datatoken value="'.&upfile_store.'">'.
119: 'Store uploaded file as '.
120: '<input type=text size=50 name=filename value="/priv/'.
121: $uname.'/'.$fn.'"><br>'.
122: '<input type=submit value="Store"></form>');
123: # Check for bad extension and warn user
124: if ($fn=~/\.(\w+)$/ &&
125: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
126: $r->print(
127: '<font color=red>'.
128: 'The extension on this file, "'.$1.
129: '", is reserved internally by LON-CAPA. <br \>'.
130: 'Please change the extension.'.
131: '</font>');
132: } elsif($fn=~/\.(\w+)$/ &&
133: !defined(&Apache::loncommon::fileembstyle($1))) {
134: $r->print(
135: '<font color=red>'.
136: 'The extension on this file, "'.$1.
137: '", is not recognized by LON-CAPA. <br \>'.
138: 'Please change the extension.'.
139: '</font>');
140: }
141: } else {
142: $r->print('<font color=red>Illegal filename.</font>');
143: }
144: } else {
145: $r->print('<font color=red>No upload file specified.</font>');
146: }
147: }
148:
149: sub phasetwo {
150: my ($r,$fn,$uname,$udom)=@_;
151: &Debug($r, "Filename is ".$fn);
152: if ($fn=~/^\/priv\/$uname\//) {
153: &Debug($r, "Filename after priv substitution: ".$fn);
154: my $tfn=$fn;
155: $tfn=~s/^\/(\~|priv)\/(\w+)//;
156: &Debug($r, "Filename for tfn = ".$tfn);
157: my $target='/home/'.$uname.'/public_html'.$tfn;
158: &Debug($r, "target -> ".$target);
159: # target is the full filesystem path of the destination file.
160: my $base = &File::Basename::basename($fn);
161: my $path = &File::Basename::dirname($fn);
162: $base = &HTML::Entities::encode($base);
163: my $url = $path."/".$base;
164: &Debug($r, "URL is now ".$url);
165: my $datatoken=$ENV{'form.datatoken'};
166: if (($fn) && ($datatoken)) {
167: if ((-e $target) && ($ENV{'form.override'} ne 'Yes')) {
168: $r->print(
169: '<form action=/adm/upload method=post>'.
170: 'File <tt>'.$fn.'</tt> exists. Overwrite? '.
171: '<input type=hidden name=phase value=two>'.
172: '<input type=hidden name=filename value="'."$url".'">'.
173: '<input type=hidden name=datatoken value="'.$datatoken.'">'.
174: '<input type=submit name=override value="Yes"></form>');
175: } else {
176: my $source=$r->dir_config('lonDaemons').
177: '/tmp/'.$datatoken.'.tmp';
178: # Check for bad extension and disallow upload
179: if ($fn=~/\.(\w+)$/ &&
180: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
181: $r->print(
182: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
183: '<font color=red>'.
184: 'The extension on this file is reserved internally by LON-CAPA.'.
185: '</font>');
186: } elsif ($fn=~/\.(\w+)$/ &&
187: !defined(&Apache::loncommon::fileembstyle($1))) {
188: $r->print(
189: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
190: '<font color=red>'.
191: 'The extension on this file is not recognized by LON-CAPA.'.
192: '</font>');
193: } elsif (copy($source,$target)) {
194: chmod(0660, $target); # Set permissions to rw-rw---.
195: $r->print('File copied.');
196: $r->print('<p><font size=+2><a href="'.$url.
197: '">View file</a></font>');
198: $r->print('<p><font size=+2><a href="'.$path.
199: '">Back to Directory</a></font>');
200: } else {
201: $r->print('Failed to copy: '.$!);
202: }
203: }
204: } else {
205: $r->print(
206: '<font size=+1 color=red>Please pick a filename</font><p>');
207: &phaseone($r,$fn,$uname,$udom);
208: }
209: } else {
210: $r->print(
211: '<font size=+1 color=red>Please pick a filename</font><p>');
212: &phaseone($r,$fn,$uname,$udom);
213: }
214: }
215:
216: # ---------------------------------------------------------------- Main Handler
217: sub handler {
218:
219: my $r=shift;
220:
221: my $uname;
222: my $udom;
223:
224: ($uname,$udom)=
225: &Apache::loncacc::constructaccess(
226: $ENV{'form.filename'},$r->dir_config('lonDefDomain'));
227: unless (($uname) && ($udom)) {
228: $r->log_reason($uname.' at '.$udom.
229: ' trying to publish file '.$ENV{'form.filename'}.
230: ' - not authorized',
231: $r->filename);
232: return HTTP_NOT_ACCEPTABLE;
233: }
234:
235: my $fn;
236:
237: if ($ENV{'form.filename'}) {
238: $fn=$ENV{'form.filename'};
239: $fn=~s/^http\:\/\/[^\/]+\/(\~|priv\/)(\w+)//;
240: } else {
241: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
242: ' unspecified filename for upload', $r->filename);
243: return HTTP_NOT_FOUND;
244: }
245:
246: # ----------------------------------------------------------- Start page output
247:
248:
249: $r->content_type('text/html');
250: $r->send_http_header;
251:
252: $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
253:
254: $r->print(&Apache::loncommon::bodytag('Upload file to Construction Space'));
255:
256: if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
257: $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.
258: '</font></h3>');
259: }
260:
261:
262: if ($ENV{'form.phase'} eq 'two') {
263: &phasetwo($r,$fn,$uname,$udom);
264: } else {
265: &phaseone($r,$fn,$uname,$udom);
266: }
267:
268: $r->print('</body></html>');
269: return OK;
270: }
271:
272: 1;
273: __END__
274:
275: =head1 NAME
276:
277: Apache::lonupload - upload files into construction space
278:
279: =head1 SYNOPSIS
280:
281: Invoked by /etc/httpd/conf/srm.conf:
282:
283: <Location /adm/upload>
284: PerlAccessHandler Apache::lonacc
285: SetHandler perl-script
286: PerlHandler Apache::lonupload
287: ErrorDocument 403 /adm/login
288: ErrorDocument 404 /adm/notfound.html
289: ErrorDocument 406 /adm/unauthorized.html
290: ErrorDocument 500 /adm/errorhandler
291: </Location>
292:
293: =head1 INTRODUCTION
294:
295: This module uploads a file sitting on a client computer into
296: library server construction space.
297:
298: This is part of the LearningOnline Network with CAPA project
299: described at http://www.lon-capa.org.
300:
301: =head1 HANDLER SUBROUTINE
302:
303: This routine is called by Apache and mod_perl.
304:
305: =over 4
306:
307: =item *
308:
309: Initialize variables
310:
311: =item *
312:
313: Start page output
314:
315: =item *
316:
317: output relevant interface phase (phaseone or phasetwo)
318:
319: =item *
320:
321: (phase one is to specify upload file; phase two is to handle conditions
322: subsequent to specification--like overwriting an existing file)
323:
324: =back
325:
326: =head1 OTHER SUBROUTINES
327:
328: =over 4
329:
330: =item *
331:
332: phaseone() : Interface for specifying file to upload.
333:
334: =item *
335:
336: phasetwo() : Interface for handling post-conditions about uploading (such
337: as overwriting an existing file).
338:
339: =item *
340:
341: upfile_store() : Store contents of uploaded file into temporary space. Invoked
342: by phaseone subroutine.
343:
344: =back
345:
346: =cut
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