1:
2: # The LearningOnline Network with CAPA
3: # Handler to upload files into construction space
4: #
5: # $Id: lonupload.pm,v 1.14 2002/09/10 02:31:26 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 File::Basename;
57: use Apache::Constants qw(:common :http :methods);
58: use Apache::loncacc;
59: use Apache::loncommon();
60: use Apache::Log();
61: use Apache::lonnet;
62: use HTML::Entities();
63:
64: my $DEBUG=0;
65:
66: sub Debug {
67:
68: # Marshall the parameters.
69:
70: my $r = shift;
71: my $log = $r->log;
72: my $message = shift;
73:
74: # Put out the indicated message butonly if DEBUG is false.
75:
76: if ($DEBUG) {
77: $log->debug($message);
78: }
79: }
80:
81: sub upfile_store {
82: my $r=shift;
83:
84: my $fname=$ENV{'form.upfile.filename'};
85: $fname=~s/\W//g;
86:
87: chop($ENV{'form.upfile'});
88:
89: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
90: '_upload_'.$fname.'_'.time.'_'.$$;
91: {
92: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
93: '/tmp/'.$datatoken.'.tmp');
94: print $fh $ENV{'form.upfile'};
95: }
96: return $datatoken;
97: }
98:
99:
100: sub phaseone {
101: my ($r,$fn,$uname,$udom)=@_;
102: $ENV{'form.upfile.filename'}=~s/\\/\//g;
103: $ENV{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
104: if ($ENV{'form.upfile.filename'}) {
105: $fn=~s/\/[^\/]+$//;
106: $fn=~s/([^\/])$/$1\//;
107: $fn.=$ENV{'form.upfile.filename'};
108: $fn=~s/^\///;
109: $fn=~s/(\/)+/\//g;
110:
111: # Fn is the full path to the destination filename.
112: #
113:
114: &Debug($r, "Filename for upload: $fn");
115: if (($fn) && ($fn!~/\/$/)) {
116: $r->print(
117: '<form action=/adm/upload method=post>'.
118: '<input type=hidden name=phase value=two>'.
119: '<input type=hidden name=datatoken value="'.&upfile_store.'">'.
120: 'Store uploaded file as '.
121: '<input type=text size=50 name=filename value="/priv/'.
122: $uname.'/'.$fn.'"><br>'.
123: '<input type=submit value="Store"></form>');
124: # Check for bad extension and warn user
125: if ($fn=~/\.(\w+)$/ &&
126: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
127: $r->print(
128: '<font color=red>'.
129: 'The extension on this file, "'.$1.
130: '", is reserved internally by LON-CAPA. <br \>'.
131: 'Please change the extension.'.
132: '</font>');
133: } elsif($fn=~/\.(\w+)$/ &&
134: !defined(&Apache::loncommon::fileembstyle($1))) {
135: $r->print(
136: '<font color=red>'.
137: 'The extension on this file, "'.$1.
138: '", is not recognized by LON-CAPA. <br \>'.
139: 'Please change the extension.'.
140: '</font>');
141: }
142: } else {
143: $r->print('<font color=red>Illegal filename.</font>');
144: }
145: } else {
146: $r->print('<font color=red>No upload file specified.</font>');
147: }
148: }
149:
150: sub phasetwo {
151: my ($r,$fn,$uname,$udom)=@_;
152: &Debug($r, "Filename is ".$fn);
153: if ($fn=~/^\/priv\/$uname\//) {
154: &Debug($r, "Filename after priv substitution: ".$fn);
155: my $tfn=$fn;
156: $tfn=~s/^\/(\~|priv)\/(\w+)//;
157: &Debug($r, "Filename for tfn = ".$tfn);
158: my $target='/home/'.$uname.'/public_html'.$tfn;
159: &Debug($r, "target -> ".$target);
160: # target is the full filesystem path of the destination file.
161: my $base = &File::Basename::basename($fn);
162: my $path = &File::Basename::dirname($fn);
163: $base = &HTML::Entities::encode($base);
164: my $url = $path."/".$base;
165: &Debug($r, "URL is now ".$url);
166: my $datatoken=$ENV{'form.datatoken'};
167: if (($fn) && ($datatoken)) {
168: if ((-e $target) && ($ENV{'form.override'} ne 'Yes')) {
169: $r->print(
170: '<form action=/adm/upload method=post>'.
171: 'File <tt>'.$fn.'</tt> exists. Overwrite? '.
172: '<input type=hidden name=phase value=two>'.
173: '<input type=hidden name=filename value="'."$url".'">'.
174: '<input type=hidden name=datatoken value="'.$datatoken.'">'.
175: '<input type=submit name=override value="Yes"></form>');
176: } else {
177: my $source=$r->dir_config('lonDaemons').
178: '/tmp/'.$datatoken.'.tmp';
179: # Check for bad extension and disallow upload
180: if ($fn=~/\.(\w+)$/ &&
181: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
182: $r->print(
183: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
184: '<font color=red>'.
185: 'The extension on this file is reserved internally by LON-CAPA.'.
186: '</font>');
187: } elsif ($fn=~/\.(\w+)$/ &&
188: !defined(&Apache::loncommon::fileembstyle($1))) {
189: $r->print(
190: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
191: '<font color=red>'.
192: 'The extension on this file is not recognized by LON-CAPA.'.
193: '</font>');
194: } elsif (copy($source,$target)) {
195: chmod(0660, $target); # Set permissions to rw-rw---.
196: $r->print('File copied.');
197: $r->print('<p><font size=+2><a href="'.$url.
198: '">View file</a></font>');
199: } else {
200: $r->print('Failed to copy: '.$!);
201: }
202: }
203: } else {
204: $r->print(
205: '<font size=+1 color=red>Please pick a filename</font><p>');
206: &phaseone($r,$fn,$uname,$udom);
207: }
208: } else {
209: $r->print(
210: '<font size=+1 color=red>Please pick a filename</font><p>');
211: &phaseone($r,$fn,$uname,$udom);
212: }
213: }
214:
215: # ---------------------------------------------------------------- Main Handler
216: sub handler {
217:
218: my $r=shift;
219:
220: my $uname;
221: my $udom;
222:
223: ($uname,$udom)=
224: &Apache::loncacc::constructaccess(
225: $ENV{'form.filename'},$r->dir_config('lonDefDomain'));
226: unless (($uname) && ($udom)) {
227: $r->log_reason($uname.' at '.$udom.
228: ' trying to publish file '.$ENV{'form.filename'}.
229: ' - not authorized',
230: $r->filename);
231: return HTTP_NOT_ACCEPTABLE;
232: }
233:
234: my $fn;
235:
236: if ($ENV{'form.filename'}) {
237: $fn=$ENV{'form.filename'};
238: $fn=~s/^http\:\/\/[^\/]+\/(\~|priv\/)(\w+)//;
239: } else {
240: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
241: ' unspecified filename for upload', $r->filename);
242: return HTTP_NOT_FOUND;
243: }
244:
245: # ----------------------------------------------------------- Start page output
246:
247:
248: $r->content_type('text/html');
249: $r->send_http_header;
250:
251: $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
252:
253: $r->print(
254: '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
255:
256:
257: $r->print('<h1>Upload file to Construction Space</h1>');
258:
259: if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
260: $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.
261: '</font></h3>');
262: }
263:
264:
265: if ($ENV{'form.phase'} eq 'two') {
266: &phasetwo($r,$fn,$uname,$udom);
267: } else {
268: &phaseone($r,$fn,$uname,$udom);
269: }
270:
271: $r->print('</body></html>');
272: return OK;
273: }
274:
275: 1;
276: __END__
277:
278: =head1 NAME
279:
280: Apache::lonupload - upload files into construction space
281:
282: =head1 SYNOPSIS
283:
284: Invoked by /etc/httpd/conf/srm.conf:
285:
286: <Location /adm/upload>
287: PerlAccessHandler Apache::lonacc
288: SetHandler perl-script
289: PerlHandler Apache::lonupload
290: ErrorDocument 403 /adm/login
291: ErrorDocument 404 /adm/notfound.html
292: ErrorDocument 406 /adm/unauthorized.html
293: ErrorDocument 500 /adm/errorhandler
294: </Location>
295:
296: =head1 INTRODUCTION
297:
298: This module uploads a file sitting on a client computer into
299: library server construction space.
300:
301: This is part of the LearningOnline Network with CAPA project
302: described at http://www.lon-capa.org.
303:
304: =head1 HANDLER SUBROUTINE
305:
306: This routine is called by Apache and mod_perl.
307:
308: =over 4
309:
310: =item *
311:
312: Initialize variables
313:
314: =item *
315:
316: Start page output
317:
318: =item *
319:
320: output relevant interface phase (phaseone or phasetwo)
321:
322: =item *
323:
324: (phase one is to specify upload file; phase two is to handle conditions
325: subsequent to specification--like overwriting an existing file)
326:
327: =back
328:
329: =head1 OTHER SUBROUTINES
330:
331: =over 4
332:
333: =item *
334:
335: phaseone() : Interface for specifying file to upload.
336:
337: =item *
338:
339: phasetwo() : Interface for handling post-conditions about uploading (such
340: as overwriting an existing file).
341:
342: =item *
343:
344: upfile_store() : Store contents of uploaded file into temporary space. Invoked
345: by phaseone subroutine.
346:
347: =back
348:
349: =cut
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