1:
2: # The LearningOnline Network with CAPA
3: # Handler to upload files into construction space
4: #
5: # $Id: lonupload.pm,v 1.43 2008/12/19 03:57:24 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: =head1 NAME
32:
33: Apache::lonupload - upload files into construction space
34:
35: =head1 SYNOPSIS
36:
37: Invoked by /etc/httpd/conf/srm.conf:
38:
39: <Location /adm/upload>
40: PerlAccessHandler Apache::lonacc
41: SetHandler perl-script
42: PerlHandler Apache::lonupload
43: ErrorDocument 403 /adm/login
44: ErrorDocument 404 /adm/notfound.html
45: ErrorDocument 406 /adm/unauthorized.html
46: ErrorDocument 500 /adm/errorhandler
47: </Location>
48:
49: =head1 INTRODUCTION
50:
51: This module uploads a file sitting on a client computer into
52: library server construction space.
53:
54: This is part of the LearningOnline Network with CAPA project
55: described at http://www.lon-capa.org.
56:
57: =head1 HANDLER SUBROUTINE
58:
59: This routine is called by Apache and mod_perl.
60:
61: =over 4
62:
63: =item *
64:
65: Initialize variables
66:
67: =item *
68:
69: Start page output
70:
71: =item *
72:
73: output relevant interface phase (phaseone or phasetwo or phasethree)
74:
75: =item *
76:
77: (phase one is to specify upload file; phase two is to handle conditions
78: subsequent to specification--like overwriting an existing file; phase three
79: is to handle processing of secondary uploads - of embedded objects in an
80: html file).
81:
82: =back
83:
84: =head1 OTHER SUBROUTINES
85:
86: =over
87:
88: =item phaseone()
89:
90: Interface for specifying file to upload.
91:
92: =item phasetwo()
93:
94: Interface for handling post-conditions about uploading (such
95: as overwriting an existing file).
96:
97: =item phasethree()
98:
99: Interface for handling secondary uploads of embedded objects
100: in an html file.
101:
102: =item upfile_store()
103:
104: Store contents of uploaded file into temporary space. Invoked
105: by phaseone subroutine.
106:
107: =item check_extension()
108:
109: Checks if filename extension is permitted and checks type
110: of file - if html file, calls parser to check for embedded objects.
111: Invoked by phasetwo subroutine.
112:
113: =back
114:
115: =cut
116:
117: package Apache::lonupload;
118:
119: use strict;
120: use Apache::File;
121: use File::Copy;
122: use File::Basename;
123: use Apache::Constants qw(:common :http :methods);
124: use Apache::loncacc;
125: use Apache::loncommon();
126: use Apache::lonnet;
127: use HTML::Entities();
128: use Apache::lonlocal;
129: use Apache::lonnet;
130: use LONCAPA();
131:
132: my $DEBUG=0;
133:
134: sub Debug {
135: # Put out the indicated message but only if DEBUG is true.
136: if ($DEBUG) {
137: my ($r,$message) = @_;
138: $r->log_reason($message);
139: }
140: }
141:
142: sub upfile_store {
143: my $r=shift;
144:
145: my $fname=$env{'form.upfile.filename'};
146: $fname=~s/\W//g;
147:
148: chomp($env{'form.upfile'});
149:
150: my $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
151: '_upload_'.$fname.'_'.time.'_'.$$;
152: {
153: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
154: '/tmp/'.$datatoken.'.tmp');
155: print $fh $env{'form.upfile'};
156: }
157: return $datatoken;
158: }
159:
160: sub phaseone {
161: my ($r,$fn,$uname,$udom,$mode)=@_;
162: my $action = '/adm/upload';
163: if ($mode eq 'testbank') {
164: $action = '/adm/testbank';
165: } elsif ($mode eq 'imsimport') {
166: $action = '/adm/imsimport';
167: }
168: $env{'form.upfile.filename'}=~s/\\/\//g;
169: $env{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
170: if ($env{'form.upfile.filename'}) {
171: $fn=~s/\/[^\/]+$//;
172: $fn=~s/([^\/])$/$1\//;
173: $fn.=$env{'form.upfile.filename'};
174: $fn=~s/^\///;
175: $fn=~s/(\/)+/\//g;
176:
177: # Fn is the full path to the destination filename.
178: #
179:
180: &Debug($r, "Filename for upload: $fn");
181: if (($fn) && ($fn!~/\/$/)) {
182: $r->print('<form action="'.$action.'" method="post" name="fileupload">'.
183: '<input type="hidden" name="phase" value="two" />'.
184: '<input type="hidden" name="datatoken" value="'.
185: &upfile_store.'" />'.
186: '<input type="hidden" name="uploaduname" value="'.$uname.
187: '" />'.&mt('Save uploaded file as [_1]',
188: "<span class='LC_filename'>/priv/$uname/</span>".
189: '<input type="text" size="50" name="filename" value="'.$fn.
190: '" />').
191: '<br />'.
192: '<br />'.&mt('Choose file type:').'
193: <select name="filetype">
194: <option value="standard" selected>'.&mt('Regular file').'
195: <option value="testbank">'.&mt('Testbank file').'
196: <option value="imsimport">'.&mt('IMS package').'
197: </select>'.&Apache::loncommon::help_open_topic("Uploading_File_Options").'
198: <br />
199: <br />
200: ');
201: $r->print('<input type="button" value="'.&mt('Save').'" onClick="javascript:verifyForm()"/></form>');
202: # Check for bad extension and warn user
203: if ($fn=~/\.(\w+)$/ &&
204: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
205: $r->print('<p class="LC_error">'
206: .&mt('The extension on this file, [_1], is reserved internally by LON-CAPA.','"'.$1.'"')
207: .' <br />'.&mt('Please change the extension.')
208: .'</p>');
209: } elsif($fn=~/\.(\w+)$/ &&
210: !defined(&Apache::loncommon::fileembstyle($1))) {
211: $r->print('<p class="LC_error">'
212: .&mt('The extension on this file, [_1], is not recognized by LON-CAPA.','"'.$1.'"')
213: .' <br />'.&mt('Please change the extension.')
214: .'</p>');
215: }
216: } else {
217: $r->print('<span class="LC_error">'.&mt('Illegal filename.').'</span>');
218: }
219: } else {
220: $r->print('<span class="LC_error">'.&mt('No upload file specified.').'</span>');
221: }
222: }
223:
224: sub phasetwo {
225: my ($r,$tfn,$uname,$udom,$mode)=@_;
226: my $output;
227: my $action = '/adm/upload';
228: my $returnflag = '';
229: if ($mode eq 'testbank') {
230: $action = '/adm/testbank';
231: } elsif ($mode eq 'imsimport') {
232: $action = '/adm/imsimport';
233: }
234: my $fn='/priv/'.$uname.'/'.$tfn;
235: $fn=~s/\/+/\//g;
236: &Debug($r, "Filename is ".$tfn);
237: if ($tfn) {
238: &Debug($r, "Filename for tfn = ".$tfn);
239: my $target='/home/'.$uname.'/public_html'.$tfn;
240: &Debug($r, "target -> ".$target);
241: # target is the full filesystem path of the destination file.
242: my $base = &File::Basename::basename($fn);
243: my $path = &File::Basename::dirname($fn);
244: $base = &HTML::Entities::encode($base,'<>&"');
245: my $url = $path."/".$base;
246: &Debug($r, "URL is now ".$url);
247: my $datatoken=$env{'form.datatoken'};
248: if (($fn) && ($datatoken)) {
249: if ($env{'form.cancel'}) {
250: my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
251: my $dirpath=$path.'/';
252: $dirpath=~s/\/+/\//g;
253: $output .= &mt('Upload cancelled.').'<br /><font size="+2"><a href="'.$dirpath.'">'.
254: &mt('Back to Directory').'</a></font>';
255: } elsif ((-e $target) && (!$env{'form.override'})) {
256: $output .= '<form action="'.$action.'" method="post">'.
257: &mt('File [_1] exists. Overwrite?','<span class="LC_filename">'.$fn.'</span>').
258: '<input type="hidden" name="phase" value="two" />'.
259: '<input type="hidden" name="filename" value="'.$url.'" />'.
260: '<input type="hidden" name="datatoken" value="'.$datatoken.'" />'.
261: '<input type="submit" name="override" value="'.&mt('Yes').'" />'.
262: '<input type="submit" name="cancel" value="'.&mt('Cancel').'" />'.
263: '</form>';
264: } else {
265: my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
266: my $dirpath=$path.'/';
267: $dirpath=~s/\/+/\//g;
268: # Check for bad extension and disallow upload
269: my $result;
270: ($result,$returnflag) = &check_extension($fn,$mode,$source,$target,$action,$dirpath,$url);
271: $output .= $result;
272: }
273: } else {
274: $output .= '<span class="LC_error">'.
275: &mt('Please use browser "Back" button and pick a filename').
276: '</span><br />';
277: }
278: } else {
279: $output .= '<span class="LC_error">'.
280: &mt('Please use browser "Back" button and pick a filename').
281: '</span><br />';
282: }
283: return ($output,$returnflag);
284: }
285:
286: sub check_extension {
287: my ($fn,$mode,$source,$target,$action,$dirpath,$url) = @_;
288: my ($result,$returnflag);
289: # Check for bad extension and disallow upload
290: if ($fn=~/\.(\w+)$/ &&
291: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
292: $result .= &mt('File [_1] could not be copied.',
293: '<span class="LC_filename">'.$fn.'</span> ').
294: '<p class="LC_error">'.
295: &mt('The extension on this file is reserved internally by LON-CAPA.').
296: '</p>';
297: } elsif ($fn=~/\.(\w+)$/ &&
298: !defined(&Apache::loncommon::fileembstyle($1))) {
299: $result .= &mt('File [_1] could not be copied.',
300: '<span class="LC_filename">'.$fn.'</span> ').
301: '<p class="LC_error">'.
302: &mt('The extension on this file is not recognized by LON-CAPA.').
303: '</p>';
304: } elsif (-d $target) {
305: $result .= &mt('File [_1] could not be copied.',
306: '<span class="LC_filename">'.$fn.'</span>').
307: '<p class="LC_error">'.
308: &mt('The target is an existing directory.').
309: '</p>';
310: } elsif (copy($source,$target)) {
311: chmod(0660, $target); # Set permissions to rw-rw---.
312: if ($mode eq 'testbank' || $mode eq 'imsimport') {
313: $returnflag = 'ok';
314: $result .= &mt('Your file - [_1] - was uploaded successfully',$fn).'<br /><br />';
315: } else {
316: $result .= &mt('File copied.').'<br />';
317: }
318: # Check for embedded objects.
319: my (%allfiles,%codebase);
320: my ($text,$header,$css,$js);
321: if (($mode ne 'imsimport') && ($target =~ /\.(htm|html|shtml)$/i)) {
322: my (%allfiles,%codebase);
323: &Apache::lonnet::extract_embedded_items($target,\%allfiles,\%codebase);
324: if (keys(%allfiles) > 0) {
325: my $state = <<STATE;
326: <input type="hidden" name="action" value="upload_embedded" />
327: <input type="hidden" name="currentpath" value="$env{'form.currentpath'}" />
328: <input type="hidden" name="mode" value="$mode" />
329: <input type="hidden" name="phase" value="three" />
330: <input type="hidden" name="filename" value="$url" />
331: STATE
332: $result .= "<h3>".&mt("Reference Warning")."</h3>".
333: "<p>".&mt("Completed upload of the file. This file contained references to other files.")."</p>".
334: "<p>".&mt("Please select the locations from which the referenced files are to be uploaded.")."</p>".
335: &Apache::loncommon::ask_for_embedded_content($action,$state,\%allfiles,\%codebase,
336: {'error_on_invalid_names' => 1,
337: 'ignore_remote_references' => 1,});
338: if ($mode eq 'testbank') {
339: $returnflag = 'embedded';
340: $result .= '<p>'.&mt('Or [_1]continue[_2] the testbank import without these files','<a href="javascript:document.testbankForm.submit();">','</a>').'</p>';
341: }
342: }
343: }
344: if (($mode ne 'imsimport') && ($mode ne 'testbank')) {
345: $result .= '<br /><font size="+2"><a href="'.$url.'">'.
346: &mt('View file').'</a></font>';
347: }
348: } else {
349: $result .= &mt('Failed to copy: [_1].',$!);
350: }
351: if ($mode ne 'imsimport' && $mode ne 'testbank') {
352: $result .= '<br /><font size="+2"><a href="'.$dirpath.'">'.
353: &mt('Back to Directory').'</a></font><br />';
354: }
355: return ($result,$returnflag);
356: }
357:
358: sub phasethree {
359: my ($r,$fn,$uname,$udom,$mode) = @_;
360: my $result;
361: my $dir_root = '/home/'.$uname.'/public_html';
362: my $url_root = '/priv/'.$uname;
363: my $base = &File::Basename::basename($fn);
364: my $path = &File::Basename::dirname($fn);
365: $result = &Apache::loncommon::upload_embedded($mode,$path,$uname,$udom,
366: $dir_root,$url_root);
367: if ($mode ne 'imsimport' && $mode ne 'testbank') {
368: $result = '<br /><font size="+2"><a href="'.$url_root.$fn.'">'.
369: &mt('View main file').'</a></font>'.
370: '<br /><font size="+2"><a href="'.$url_root.$path.'">'.
371: &mt('Back to Directory').'</a></font><br />';
372: }
373: return $result;
374: }
375:
376: # ---------------------------------------------------------------- Main Handler
377: sub handler {
378:
379: my $r=shift;
380:
381: my $uname;
382: my $udom;
383: my $javascript = '';
384: #
385: # phase two: re-attach user
386: #
387: if ($env{'form.uploaduname'}) {
388: $env{'form.filename'}='/priv/'.$env{'form.uploaduname'}.'/'.
389: $env{'form.filename'};
390: }
391:
392: unless ($env{'form.phase'} eq 'two') {
393: $javascript = qq|
394: function verifyForm() {
395: var mode = document.fileupload.filetype.options[document.fileupload.filetype.selectedIndex].value
396: if (mode == "testbank") {
397: document.fileupload.action = "/adm/testbank";
398: }
399: if (mode == "imsimport") {
400: document.fileupload.action = "/adm/imsimport";
401: }
402: if (mode == "standard") {
403: document.fileupload.action = "/adm/upload";
404: }
405: document.fileupload.submit();
406: }
407: |;
408: }
409: ($uname,$udom)=
410: &Apache::loncacc::constructaccess($env{'form.filename'},
411: $r->dir_config('lonDefDomain'));
412:
413: unless (($uname) && ($udom)) {
414: $r->log_reason($uname.' at '.$udom.
415: ' trying to publish file '.$env{'form.filename'}.
416: ' - not authorized',
417: $r->filename);
418: return HTTP_NOT_ACCEPTABLE;
419: }
420:
421: my $fn;
422: if ($env{'form.filename'}) {
423: $fn=$env{'form.filename'};
424: $fn=~s/^https?\:\/\/[^\/]+\///;
425: $fn=~s/^\///;
426: $fn=~s{(~|priv/)($LONCAPA::username_re)}{};
427: $fn=~s/\/+/\//g;
428: } else {
429: $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
430: ' unspecified filename for upload', $r->filename);
431: return HTTP_NOT_FOUND;
432: }
433:
434: # ----------------------------------------------------------- Start page output
435:
436:
437: &Apache::loncommon::content_type($r,'text/html');
438: $r->send_http_header;
439:
440: $javascript = "<script type=\"text/javascript\">\n//<!--\n".
441: $javascript."\n// --></script>\n";
442:
443: $r->print(&Apache::loncommon::start_page('Upload file to Construction Space',
444: $javascript));
445:
446: if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
447: $r->print('<h3><span class="LC_error">'.&mt('Co-Author').': '.$uname.
448: &mt(' at ').$udom.'</span></h3>');
449: }
450:
451: if ($env{'form.phase'} eq 'three') {
452: my $output = &phasethree($r,$fn,$uname,$udom,'author');
453: $r->print($output);
454: } elsif ($env{'form.phase'} eq 'two') {
455: my ($output,$returnflag) = &phasetwo($r,$fn,$uname,$udom);
456: $r->print($output);
457: } else {
458: &phaseone($r,$fn,$uname,$udom);
459: }
460:
461: $r->print(&Apache::loncommon::end_page());
462: return OK;
463: }
464:
465: 1;
466: __END__
467:
468:
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