1:
2: # The LearningOnline Network with CAPA
3: # Handler to upload files into construction space
4: #
5: # $Id: lonupload.pm,v 1.19 2003/08/04 18:22:55 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: ###
30:
31: package Apache::lonupload;
32:
33: use strict;
34: use Apache::File;
35: use File::Copy;
36: use File::Basename;
37: use Apache::Constants qw(:common :http :methods);
38: use Apache::loncacc;
39: use Apache::loncommon();
40: use Apache::Log();
41: use Apache::lonnet;
42: use HTML::Entities();
43:
44: my $DEBUG=0;
45:
46: sub Debug {
47:
48: # Marshall the parameters.
49:
50: my $r = shift;
51: my $log = $r->log;
52: my $message = shift;
53:
54: # Put out the indicated message butonly if DEBUG is false.
55:
56: if ($DEBUG) {
57: $log->debug($message);
58: }
59: }
60:
61: sub upfile_store {
62: my $r=shift;
63:
64: my $fname=$ENV{'form.upfile.filename'};
65: $fname=~s/\W//g;
66:
67: chomp($ENV{'form.upfile'});
68:
69: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
70: '_upload_'.$fname.'_'.time.'_'.$$;
71: {
72: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
73: '/tmp/'.$datatoken.'.tmp');
74: print $fh $ENV{'form.upfile'};
75: }
76: return $datatoken;
77: }
78:
79:
80: sub phaseone {
81: my ($r,$fn,$uname,$udom)=@_;
82: $ENV{'form.upfile.filename'}=~s/\\/\//g;
83: $ENV{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
84: if ($ENV{'form.upfile.filename'}) {
85: $fn=~s/\/[^\/]+$//;
86: $fn=~s/([^\/])$/$1\//;
87: $fn.=$ENV{'form.upfile.filename'};
88: $fn=~s/^\///;
89: $fn=~s/(\/)+/\//g;
90:
91: # Fn is the full path to the destination filename.
92: #
93:
94: &Debug($r, "Filename for upload: $fn");
95: if (($fn) && ($fn!~/\/$/)) {
96: $r->print(
97: '<form action=/adm/upload method=post>'.
98: '<input type=hidden name=phase value=two>'.
99: '<input type=hidden name=datatoken value="'.&upfile_store.'">'.
100: '<input type=hidden name=uploaduname value="'.$uname.'">'.
101: 'Store uploaded file as '.
102: '<input type=text size=50 name=filename value="'.$fn.'"><br>'.
103: '<input type=submit value="Store"></form>');
104: # Check for bad extension and warn user
105: if ($fn=~/\.(\w+)$/ &&
106: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
107: $r->print(
108: '<font color=red>'.
109: 'The extension on this file, "'.$1.
110: '", is reserved internally by LON-CAPA. <br \>'.
111: 'Please change the extension.'.
112: '</font>');
113: } elsif($fn=~/\.(\w+)$/ &&
114: !defined(&Apache::loncommon::fileembstyle($1))) {
115: $r->print(
116: '<font color=red>'.
117: 'The extension on this file, "'.$1.
118: '", is not recognized by LON-CAPA. <br \>'.
119: 'Please change the extension.'.
120: '</font>');
121: }
122: } else {
123: $r->print('<font color=red>Illegal filename.</font>');
124: }
125: } else {
126: $r->print('<font color=red>No upload file specified.</font>');
127: }
128: }
129:
130: sub phasetwo {
131: my ($r,$tfn,$uname,$udom)=@_;
132: my $fn='/priv/'.$uname.'/'.$tfn;
133: $fn=~s/\/+/\//g;
134: &Debug($r, "Filename is ".$tfn);
135: if ($tfn) {
136: &Debug($r, "Filename for tfn = ".$tfn);
137: my $target='/home/'.$uname.'/public_html'.$tfn;
138: &Debug($r, "target -> ".$target);
139: # target is the full filesystem path of the destination file.
140: my $base = &File::Basename::basename($fn);
141: my $path = &File::Basename::dirname($fn);
142: $base = &HTML::Entities::encode($base);
143: my $url = $path."/".$base;
144: &Debug($r, "URL is now ".$url);
145: my $datatoken=$ENV{'form.datatoken'};
146: if (($fn) && ($datatoken)) {
147: if ((-e $target) && ($ENV{'form.override'} ne 'Yes')) {
148: $r->print(
149: '<form action=/adm/upload method=post>'.
150: 'File <tt>'.$fn.'</tt> exists. Overwrite? '.
151: '<input type=hidden name=phase value=two>'.
152: '<input type=hidden name=filename value="'."$url".'">'.
153: '<input type=hidden name=datatoken value="'.$datatoken.'">'.
154: '<input type=submit name=override value="Yes"></form>');
155: } else {
156: my $source=$r->dir_config('lonDaemons').
157: '/tmp/'.$datatoken.'.tmp';
158: # Check for bad extension and disallow upload
159: if ($fn=~/\.(\w+)$/ &&
160: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
161: $r->print(
162: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
163: '<font color=red>'.
164: 'The extension on this file is reserved internally by LON-CAPA.'.
165: '</font>');
166: $r->print('<p><font size=+2><a href="'.$path.
167: '">Back to Directory</a></font>');
168: } elsif ($fn=~/\.(\w+)$/ &&
169: !defined(&Apache::loncommon::fileembstyle($1))) {
170: $r->print(
171: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
172: '<font color=red>'.
173: 'The extension on this file is not recognized by LON-CAPA.'.
174: '</font>');
175: $r->print('<p><font size=+2><a href="'.$path.
176: '">Back to Directory</a></font>');
177: } elsif (-d $target) {
178: $r->print(
179: 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
180: '<font color=red>'.
181: 'The target is an existing directory.'.
182: '</font>');
183: $r->print('<p><font size=+2><a href="'.$path.
184: '">Back to Directory</a></font>');
185: } elsif (copy($source,$target)) {
186: chmod(0660, $target); # Set permissions to rw-rw---.
187: $r->print('File copied.');
188: $r->print('<p><font size=+2><a href="'.$url.
189: '">View file</a></font>');
190: $r->print('<p><font size=+2><a href="'.$path.
191: '">Back to Directory</a></font>');
192: } else {
193: $r->print('Failed to copy: '.$!);
194: $r->print('<p><font size=+2><a href="'.$path.
195: '">Back to Directory</a></font>');
196: }
197: }
198: } else {
199: $r->print(
200: '<font size=+1 color=red>Please use browser "Back" button and pick a filename</font><p>');
201: }
202: } else {
203: $r->print(
204: '<font size=+1 color=red>Please use browser "Back" button and pick a filename</font><p>');
205: }
206: }
207:
208: # ---------------------------------------------------------------- Main Handler
209: sub handler {
210:
211: my $r=shift;
212:
213: my $uname;
214: my $udom;
215: #
216: # phase two: re-attach user
217: #
218: if ($ENV{'form.uploaduname'}) {
219: $ENV{'form.filename'}='/priv/'.$ENV{'form.uploaduname'}.'/'.
220: $ENV{'form.filename'};
221: }
222: #
223:
224: ($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 $fn;
236: if ($ENV{'form.filename'}) {
237: $fn=$ENV{'form.filename'};
238: $fn=~s/^http\:\/\/[^\/]+\///;
239: $fn=~s/^\///;
240: $fn=~s/(\~|priv\/)(\w+)//;
241: $fn=~s/\/+/\//g;
242: } else {
243: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
244: ' unspecified filename for upload', $r->filename);
245: return HTTP_NOT_FOUND;
246: }
247:
248: # ----------------------------------------------------------- Start page output
249:
250:
251: $r->content_type('text/html');
252: $r->send_http_header;
253:
254: $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
255:
256: $r->print(&Apache::loncommon::bodytag('Upload file to Construction Space'));
257:
258: if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
259: $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.
260: '</font></h3>');
261: }
262:
263:
264: if ($ENV{'form.phase'} eq 'two') {
265: &phasetwo($r,$fn,$uname,$udom);
266: } else {
267: &phaseone($r,$fn,$uname,$udom);
268: }
269:
270: $r->print('</body></html>');
271: return OK;
272: }
273:
274: 1;
275: __END__
276:
277: =head1 NAME
278:
279: Apache::lonupload - upload files into construction space
280:
281: =head1 SYNOPSIS
282:
283: Invoked by /etc/httpd/conf/srm.conf:
284:
285: <Location /adm/upload>
286: PerlAccessHandler Apache::lonacc
287: SetHandler perl-script
288: PerlHandler Apache::lonupload
289: ErrorDocument 403 /adm/login
290: ErrorDocument 404 /adm/notfound.html
291: ErrorDocument 406 /adm/unauthorized.html
292: ErrorDocument 500 /adm/errorhandler
293: </Location>
294:
295: =head1 INTRODUCTION
296:
297: This module uploads a file sitting on a client computer into
298: library server construction space.
299:
300: This is part of the LearningOnline Network with CAPA project
301: described at http://www.lon-capa.org.
302:
303: =head1 HANDLER SUBROUTINE
304:
305: This routine is called by Apache and mod_perl.
306:
307: =over 4
308:
309: =item *
310:
311: Initialize variables
312:
313: =item *
314:
315: Start page output
316:
317: =item *
318:
319: output relevant interface phase (phaseone or phasetwo)
320:
321: =item *
322:
323: (phase one is to specify upload file; phase two is to handle conditions
324: subsequent to specification--like overwriting an existing file)
325:
326: =back
327:
328: =head1 OTHER SUBROUTINES
329:
330: =over 4
331:
332: =item *
333:
334: phaseone() : Interface for specifying file to upload.
335:
336: =item *
337:
338: phasetwo() : Interface for handling post-conditions about uploading (such
339: as overwriting an existing file).
340:
341: =item *
342:
343: upfile_store() : Store contents of uploaded file into temporary space. Invoked
344: by phaseone subroutine.
345:
346: =back
347:
348: =cut
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