1:
2: # The LearningOnline Network with CAPA
3: # Handler to upload files into construction space
4: #
5: # $Id: lonupload.pm,v 1.38.2.2 2008/12/17 19:18:47 raeburn 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::lonnet;
41: use HTML::Entities();
42: use Apache::lonlocal;
43: use Apache::lonnet;
44: use LONCAPA();
45:
46: my $DEBUG=0;
47:
48: sub Debug {
49: # Put out the indicated message but only if DEBUG is true.
50: if ($DEBUG) {
51: my ($r,$message) = @_;
52: $r->log_reason($message);
53: }
54: }
55:
56: sub upfile_store {
57: my $r=shift;
58:
59: my $fname=$env{'form.upfile.filename'};
60: $fname=~s/\W//g;
61:
62: chomp($env{'form.upfile'});
63:
64: my $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
65: '_upload_'.$fname.'_'.time.'_'.$$;
66: {
67: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
68: '/tmp/'.$datatoken.'.tmp');
69: print $fh $env{'form.upfile'};
70: }
71: return $datatoken;
72: }
73:
74: sub phaseone {
75: my ($r,$fn,$uname,$udom,$mode)=@_;
76: my $action = '/adm/upload';
77: if ($mode eq 'testbank') {
78: $action = '/adm/testbank';
79: } elsif ($mode eq 'imsimport') {
80: $action = '/adm/imsimport';
81: }
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: $r->print('<form action="'.$action.'" method="post" name="fileupload">'.
97: '<input type="hidden" name="phase" value="two" />'.
98: '<input type="hidden" name="datatoken" value="'.
99: &upfile_store.'" />'.
100: '<input type="hidden" name="uploaduname" value="'.$uname.
101: '" />'.&mt('Save uploaded file as [_1]',
102: '<span class="LC_filename">/priv/'.$uname.'/</span>'.
103: '<input type="text" size="50" name="filename" value="'.$fn.
104: '" />').
105: '<br />'.
106: '<br />'.&mt('Choose file type:').'
107: <select name="filetype">
108: <option value="standard" selected>'.&mt('Regular file').'
109: <option value="testbank">'.&mt('Testbank file').'
110: <option value="imsimport">'.&mt('IMS package').'
111: </select>'.&Apache::loncommon::help_open_topic("Uploading_File_Options").'
112: <br />
113: <br />
114: ');
115: $r->print('<input type="button" value="'.&mt('Save').'" onClick="javascript:verifyForm()"/></form>');
116: # Check for bad extension and warn user
117: if ($fn=~/\.(\w+)$/ &&
118: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
119: $r->print('<p class="LC_error">'
120: .&mt('The extension on this file, [_1], is reserved internally by LON-CAPA.','"'.$1.'"' )
121: .' <br />'.&mt('Please change the extension.')
122: .'</p>');
123: } elsif($fn=~/\.(\w+)$/ &&
124: !defined(&Apache::loncommon::fileembstyle($1))) {
125: $r->print('<p class="LC_error">'
126: .&mt('The extension on this file, [_1], is not recognized by LON-CAPA.','"'.$1.'"')
127: .' <br />'.&mt('Please change the extension.')
128: .'</p>');
129: }
130: } else {
131: $r->print('<span class="LC_error">'.&mt('Illegal filename.').'</span>');
132: }
133: } else {
134: $r->print('<span class="LC_error">'.&mt('No upload file specified.').'</span>');
135: }
136: }
137:
138: sub phasetwo {
139: my ($r,$tfn,$uname,$udom,$mode)=@_;
140: my $output;
141: my $action = '/adm/upload';
142: my $returnflag = '';
143: if ($mode eq 'testbank') {
144: $action = '/adm/testbank';
145: } elsif ($mode eq 'imsimport') {
146: $action = '/adm/imsimport';
147: }
148: my $fn='/priv/'.$uname.'/'.$tfn;
149: $fn=~s/\/+/\//g;
150: &Debug($r, "Filename is ".$tfn);
151: if ($tfn) {
152: &Debug($r, "Filename for tfn = ".$tfn);
153: my $target='/home/'.$uname.'/public_html'.$tfn;
154: &Debug($r, "target -> ".$target);
155: # target is the full filesystem path of the destination file.
156: my $base = &File::Basename::basename($fn);
157: my $path = &File::Basename::dirname($fn);
158: $base = &HTML::Entities::encode($base,'<>&"');
159: my $url = $path."/".$base;
160: &Debug($r, "URL is now ".$url);
161: my $datatoken=$env{'form.datatoken'};
162: if (($fn) && ($datatoken)) {
163: if ($env{'form.cancel'}) {
164: my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
165: my $dirpath=$path.'/';
166: $dirpath=~s/\/+/\//g;
167: $output .= &mt('Upload cancelled.').'<br /><font size="+2"><a href="'.$dirpath.'">'.
168: &mt('Back to Directory').'</a></font>';
169: } elsif ((-e $target) && (!$env{'form.override'})) {
170: $output .= '<form action="'.$action.'" method="post">'.
171: &mt('File [_1] exists. Overwrite?','<span class="LC_filename">'.$fn.'</span>').
172: '<input type="hidden" name="phase" value="two" />'.
173: '<input type="hidden" name="filename" value="'.$url.'" />'.
174: '<input type="hidden" name="datatoken" value="'.$datatoken.'" />'.
175: '<input type="submit" name="override" value="'.&mt('Yes').'" />'.
176: '<input type="submit" name="cancel" value="'.&mt('Cancel').'" />'.
177: '</form>';
178: } else {
179: my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
180: my $dirpath=$path.'/';
181: $dirpath=~s/\/+/\//g;
182: # Check for bad extension and disallow upload
183: my $result;
184: ($result,$returnflag) = &check_extension($fn,$mode,$source,$target,$action,$dirpath,$url);
185: $output .= $result;
186: }
187: } else {
188: $output .= '<span class="LC_error">'.
189: &mt('Please use browser "Back" button and pick a filename').
190: '</span><br />';
191: }
192: } else {
193: $output .= '<span class="LC_error">'.
194: &mt('Please use browser "Back" button and pick a filename').
195: '</span><br />';
196: }
197: return ($output,$returnflag);
198: }
199:
200: sub check_extension {
201: my ($fn,$mode,$source,$target,$action,$dirpath,$url) = @_;
202: my ($result,$returnflag);
203: # Check for bad extension and disallow upload
204: if ($fn=~/\.(\w+)$/ &&
205: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
206: $result .= &mt('File [_1] could not be copied.',
207: '<span class="LC_filename">'.$fn.'</span> ').
208: '<p class="LC_error">'.
209: &mt('The extension on this file is reserved internally by LON-CAPA.').
210: '</p>';
211: } elsif ($fn=~/\.(\w+)$/ &&
212: !defined(&Apache::loncommon::fileembstyle($1))) {
213: $result .= &mt('File [_1] could not be copied.',
214: '<span class="LC_filename">'.$fn.'</span> ').
215: '<p class="LC_error">'.
216: &mt('The extension on this file is not recognized by LON-CAPA.').
217: '</p>';
218: } elsif (-d $target) {
219: $result .= &mt('File [_1] could not be copied.',
220: '<span class="LC_filename">'.$fn.'</span>').
221: '<p class="LC_error">'.
222: &mt('The target is an existing directory.').
223: '</p>';
224: } elsif (copy($source,$target)) {
225: chmod(0660, $target); # Set permissions to rw-rw---.
226: if ($mode eq 'testbank' || $mode eq 'imsimport') {
227: $returnflag = 'ok';
228: $result .= &mt('Your file - [_1] - was uploaded successfully',$fn).'<br /><br />';
229: } else {
230: $result .= &mt('File copied.').'<br />';
231: }
232: # Check for embedded objects.
233: my (%allfiles,%codebase);
234: my ($text,$header,$css,$js);
235: if (($mode ne 'imsimport') && ($target =~ /\.(htm|html|shtml)$/i)) {
236: my (%allfiles,%codebase);
237: &Apache::lonnet::extract_embedded_items($target,\%allfiles,\%codebase);
238: if (keys(%allfiles) > 0) {
239: my $state = <<STATE;
240: <input type="hidden" name="action" value="upload_embedded" />
241: <input type="hidden" name="currentpath" value="$env{'form.currentpath'}" />
242: <input type="hidden" name="mode" value="$mode" />
243: <input type="hidden" name="phase" value="three" />
244: <input type="hidden" name="filename" value="$url" />
245: STATE
246: $result .= "<h3>".&mt("Reference Warning")."</h3>".
247: "<p>".&mt("Completed upload of the file. This file contained references to other files.")."</p>".
248: "<p>".&mt("Please select the locations from which the referenced files are to be uploaded.")."</p>".
249: &Apache::loncommon::ask_for_embedded_content($action,$state,\%allfiles,\%codebase,
250: {'error_on_invalid_names' => 1,
251: 'ignore_remote_references' => 1,});
252: if ($mode eq 'testbank') {
253: $returnflag = 'embedded';
254: $result .= '<p>'.&mt('Or [_1]continue[_2] the testbank import without these files','<a href="javascript:document.testbankForm.submit();">','</a>').'</p>';
255: }
256: }
257: }
258: if (($mode ne 'imsimport') && ($mode ne 'testbank')) {
259: $result .= '<br /><font size="+2"><a href="'.$url.'">'.
260: &mt('View file').'</a></font>';
261: }
262: } else {
263: $result .= &mt('Failed to copy: [_1].',$!);
264: }
265: if ($mode ne 'imsimport' && $mode ne 'testbank') {
266: $result .= '<br /><font size="+2"><a href="'.$dirpath.'">'.
267: &mt('Back to Directory').'</a></font><br />';
268: }
269: return ($result,$returnflag);
270: }
271:
272: sub phasethree {
273: my ($r,$fn,$uname,$udom,$mode) = @_;
274: my $result;
275: my $dir_root = '/home/'.$uname.'/public_html';
276: my $url_root = '/priv/'.$uname;
277: my $base = &File::Basename::basename($fn);
278: my $path = &File::Basename::dirname($fn);
279: $result = &Apache::loncommon::upload_embedded($mode,$path,$uname,$udom,
280: $dir_root,$url_root);
281: if ($mode ne 'imsimport' && $mode ne 'testbank') {
282: $result = '<br /><font size="+2"><a href="'.$url_root.$fn.'">'.
283: &mt('View main file').'</a></font>'.
284: '<br /><font size="+2"><a href="'.$url_root.$path.'">'.
285: &mt('Back to Directory').'</a></font><br />';
286: }
287: return $result;
288: }
289:
290: # ---------------------------------------------------------------- Main Handler
291: sub handler {
292:
293: my $r=shift;
294:
295: my $uname;
296: my $udom;
297: my $javascript = '';
298: #
299: # phase two: re-attach user
300: #
301: if ($env{'form.uploaduname'}) {
302: $env{'form.filename'}='/priv/'.$env{'form.uploaduname'}.'/'.
303: $env{'form.filename'};
304: }
305:
306: unless ($env{'form.phase'} eq 'two') {
307: $javascript = qq|
308: function verifyForm() {
309: var mode = document.fileupload.filetype.options[document.fileupload.filetype.selectedIndex].value
310: if (mode == "testbank") {
311: document.fileupload.action = "/adm/testbank";
312: }
313: if (mode == "imsimport") {
314: document.fileupload.action = "/adm/imsimport";
315: }
316: if (mode == "standard") {
317: document.fileupload.action = "/adm/upload";
318: }
319: document.fileupload.submit();
320: }
321: |;
322: }
323: ($uname,$udom)=
324: &Apache::loncacc::constructaccess($env{'form.filename'},
325: $r->dir_config('lonDefDomain'));
326:
327: unless (($uname) && ($udom)) {
328: $r->log_reason($uname.' at '.$udom.
329: ' trying to publish file '.$env{'form.filename'}.
330: ' - not authorized',
331: $r->filename);
332: return HTTP_NOT_ACCEPTABLE;
333: }
334:
335: my $fn;
336: if ($env{'form.filename'}) {
337: $fn=$env{'form.filename'};
338: $fn=~s/^http\:\/\/[^\/]+\///;
339: $fn=~s/^\///;
340: $fn=~s{(~|priv/)($LONCAPA::username_re)}{};
341: $fn=~s/\/+/\//g;
342: } else {
343: $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
344: ' unspecified filename for upload', $r->filename);
345: return HTTP_NOT_FOUND;
346: }
347:
348: # ----------------------------------------------------------- Start page output
349:
350:
351: &Apache::loncommon::content_type($r,'text/html');
352: $r->send_http_header;
353:
354: $javascript = "<script type=\"text/javascript\">\n//<!--\n".
355: $javascript."\n// --></script>\n";
356:
357: $r->print(&Apache::loncommon::start_page('Upload file to Construction Space',
358: $javascript));
359:
360: if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
361: $r->print('<h3><span class="LC_error">'.&mt('Co-Author').': '.$uname.
362: &mt(' at ').$udom.'</span></h3>');
363: }
364:
365: if ($env{'form.phase'} eq 'three') {
366: my $output = &phasethree($r,$fn,$uname,$udom,'author');
367: $r->print($output);
368: } elsif ($env{'form.phase'} eq 'two') {
369: my ($output,$returnflag) = &phasetwo($r,$fn,$uname,$udom);
370: $r->print($output);
371: } else {
372: &phaseone($r,$fn,$uname,$udom);
373: }
374:
375: $r->print(&Apache::loncommon::end_page());
376: return OK;
377: }
378:
379: 1;
380: __END__
381:
382: =head1 NAME
383:
384: Apache::lonupload - upload files into construction space
385:
386: =head1 SYNOPSIS
387:
388: Invoked by /etc/httpd/conf/srm.conf:
389:
390: <Location /adm/upload>
391: PerlAccessHandler Apache::lonacc
392: SetHandler perl-script
393: PerlHandler Apache::lonupload
394: ErrorDocument 403 /adm/login
395: ErrorDocument 404 /adm/notfound.html
396: ErrorDocument 406 /adm/unauthorized.html
397: ErrorDocument 500 /adm/errorhandler
398: </Location>
399:
400: =head1 INTRODUCTION
401:
402: This module uploads a file sitting on a client computer into
403: library server construction space.
404:
405: This is part of the LearningOnline Network with CAPA project
406: described at http://www.lon-capa.org.
407:
408: =head1 HANDLER SUBROUTINE
409:
410: This routine is called by Apache and mod_perl.
411:
412: =over 4
413:
414: =item *
415:
416: Initialize variables
417:
418: =item *
419:
420: Start page output
421:
422: =item *
423:
424: output relevant interface phase (phaseone or phasetwo or phasethree)
425:
426: =item *
427:
428: (phase one is to specify upload file; phase two is to handle conditions
429: subsequent to specification--like overwriting an existing file; phase three
430: is to handle processing of secondary uploads - of embedded objects in an
431: html file).
432:
433: =back
434:
435: =head1 OTHER SUBROUTINES
436:
437: =over 4
438:
439: =item *
440:
441: phaseone() : Interface for specifying file to upload.
442:
443: =item *
444:
445: phasetwo() : Interface for handling post-conditions about uploading (such
446: as overwriting an existing file).
447:
448: =item *
449:
450: phasethree() : Interface for handling secondary uploads of embedded objects
451: in an html file.
452:
453: =item *
454:
455: upfile_store() : Store contents of uploaded file into temporary space. Invoked
456: by phaseone subroutine.
457:
458: =item *
459:
460: check_extension() : Checks if filename extension is permitted and checks type
461: of file - if html file, calls parser to check for embedded objects.
462: Invoked by phasetwo subroutine.
463:
464: =back
465:
466: =cut
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