Annotation of loncom/publisher/lonretrieve.pm, revision 1.38
1.1 www 1: # The LearningOnline Network with CAPA
2: # Handler to retrieve an old version of a file
3: #
1.38 ! bisitz 4: # $Id: lonretrieve.pm,v 1.37 2008/12/19 03:55:25 raeburn Exp $
1.15 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: #
1.16 harris41 29: ###
1.1 www 30:
1.35 jms 31: =head1 NAME
32:
33: Apache::lonretrieve - retrieves an old version of a file
34:
35: =head1 SYNOPSIS
36:
37: Invoked by /etc/httpd/conf/srm.conf:
38:
39: <Location /adm/retrieve>
40: PerlAccessHandler Apache::lonacc
41: SetHandler perl-script
42: PerlHandler Apache::lonretrieve
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 retrieves an old published version of a file.
52:
53: This is part of the LearningOnline Network with CAPA project
54: described at http://www.lon-capa.org.
55:
56: =head1 HANDLER SUBROUTINE
57:
58: This routine is called by Apache and mod_perl.
59:
60: =over 4
61:
62: =item *
63:
64: Get query string for limited number of parameters
65:
66: =item *
67:
68: Start page output
69:
70: =item *
71:
72: print phase relevant output
73:
74: =item *
75:
76: (phase one is to select version; phase two retrieves version)
77:
78: =back
79:
80: =head1 OTHER SUBROUTINES
81:
82: =over 4
83:
84: =item *
85:
86: phaseone() : Interface for selecting previous version.
87:
88: =item *
89:
90: phasetwo() : Interface for presenting specified version.
91:
92: =back
93:
94: =cut
95:
1.1 www 96: package Apache::lonretrieve;
97:
98: use strict;
99: use Apache::File;
100: use File::Copy;
101: use Apache::Constants qw(:common :http :methods);
1.10 www 102: use Apache::loncacc;
1.16 harris41 103: use Apache::loncommon();
1.23 www 104: use Apache::lonlocal;
1.27 albertel 105: use Apache::lonnet;
1.34 albertel 106: use LONCAPA();
1.1 www 107:
1.16 harris41 108: # ------------------------------------ Interface for selecting previous version
1.2 www 109: sub phaseone {
110: my ($r,$fn,$uname,$udom)=@_;
111: my $docroot=$r->dir_config('lonDocRoot');
112:
1.3 www 113: my $urldir='/res/'.$udom.'/'.$uname.$fn;
114: $urldir=~s/\/[^\/]+$/\//;
115:
116: my $resfn=$docroot.'/res/'.$udom.'/'.$uname.$fn;
117: my $resdir=$resfn;
1.2 www 118: $resdir=~s/\/[^\/]+$/\//;
119:
1.31 albertel 120: my ($main,$suffix,$is_meta) = &get_file_info($fn);
121:
1.6 www 122: if (-e $resfn) {
1.32 albertel 123: $r->print('<form action="/adm/retrieve" method="POST">'.
124: '<input type="hidden" name="filename" value="/~'.$uname.$fn.'" />'.
125: '<input type="hidden" name="phase" value="two" />'.
126: &Apache::loncommon::start_data_table().
127: &Apache::loncommon::start_data_table_header_row().
128: '<th>'.&mt('Select').'</th>'.
129: '<th>'.&mt('Version').'</th>'.
130: '<th>'.&mt('Published on ...').'</th>');
131: if (!$is_meta) {
132: $r->print('<th>'.&mt('Metadata').'</th>');
133: }
134: if ($is_meta
135: || &Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
136: $r->print('<th>'.&mt('Diffs').'</th>');
137: }
138: $r->print(&Apache::loncommon::end_data_table_header_row());
139:
140: opendir(DIR,$resdir);
141: my @files = grep(/^\Q$main\E\.(\d+)\.\Q$suffix\E$/,readdir(DIR));
142: @files = sort {
143: my ($aver) = ($a=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/);
144: my ($bver) = ($b=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/);
145: return $aver <=> $bver;
146: } (@files);
147: closedir(DIR);
148:
149: foreach my $filename (@files) {
150: if ($filename=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/) {
151: my $version=$1;
152: my $rmtime=&Apache::lonnet::metadata($resdir.'/'.$filename,'lastrevisiondate');
153: $r->print(&Apache::loncommon::start_data_table_row().
154: '<td><input type="radio" name="version" value="'.
155: $version.'" /></td><td>'.&mt('Previously published version').' '.$version.'</td><td>'.
156: localtime($rmtime).'</td>');
157:
158: if (!$is_meta) {
1.38 ! bisitz 159: $r->print('<td><a href="'.$urldir.$filename.'.meta" target="cat">'.
1.32 albertel 160: &mt('Metadata Version').' '.$version.'</a></td>');
161: }
162: if ($is_meta
163: || &Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
164: $r->print(
165: '<td><a target="cat" href="/adm/diff?filename=/~'.
166: $uname.$fn.
167: '&versiontwo=priv&versionone='.$version.
168: '">'.&mt('Diffs with Version').' '.$version.
169: '</a></td>');
170: }
171: $r->print(&Apache::loncommon::end_data_table_row());
172: }
173: }
174: closedir(DIR);
175: my $rmtime=&Apache::lonnet::metadata($resfn,'lastrevisiondate');
176: $r->print(&Apache::loncommon::start_data_table_row().
177: '<td><input type="radio" name="version" value="new" /></td>'.
178: '<td><b>'.&mt('Currently published version').'</b></td><td>'.localtime($rmtime).
179: '</td>');
180: if (!$is_meta) {
1.38 ! bisitz 181: $r->print('<td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target="cat">'.
1.32 albertel 182: &mt('Metadata current version').'</a></td>');
183: }
184: if ($is_meta
185: || &Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
186: $r->print(
187: '<td><a target="cat" href="/adm/diff?filename=/~'.
188: $uname.$fn.
189: '&versiontwo=priv'.
190: '">'.&mt('Diffs with current Version').'</a></td>');
191: }
192: $r->print(&Apache::loncommon::end_data_table_row().
193: &Apache::loncommon::end_data_table().
1.33 albertel 194: '<p>'.'<span class="LC_warning">'.
1.36 bisitz 195: &mt('Retrieval of an old version will overwrite the file currently in construction space.').'</span></p>');
1.33 albertel 196: if (!$is_meta) {
197: $r->print('<p>'.'<span class="LC_warning">'.
1.36 bisitz 198: &mt('This will only retrieve the resource. If you want to retrieve the metadata, you will need to do that separately.').
1.33 albertel 199: '</span></p>');
200: }
201: $r->print('<input type="submit" value="'.&mt('Retrieve version').'" /></form>');
1.32 albertel 202: } else {
1.36 bisitz 203: $r->print('<p class="LC_warning">'.&mt('No previous versions published.').'</p>');
1.31 albertel 204: }
1.36 bisitz 205: $r->print('<p><a href="/priv/'.$uname.$fn.'">'
206: .&mt('Back to [_1]','<span class="LC_filename">'.$fn.'</span>')
207: .'</a></p>');
1.2 www 208: }
1.1 www 209:
1.16 harris41 210: # ---------------------------------- Interface for presenting specified version
1.4 www 211: sub phasetwo {
212: my ($r,$fn,$uname,$udom)=@_;
1.27 albertel 213: if ($env{'form.version'}) {
214: my $version=$env{'form.version'};
1.4 www 215: if ($version eq 'new') {
1.23 www 216: $r->print('<h3>'.&mt('Retrieving current (most recent) version').'</h3>');
1.4 www 217: } else {
1.23 www 218: $r->print('<h3>'.&mt('Retrieving old version').' '.$version.'</h3>');
1.4 www 219: }
1.31 albertel 220: my ($main,$suffix,$is_meta) = &get_file_info($fn);
221:
1.4 www 222: my $logfile;
223: my $ctarget='/home/'.$uname.'/public_html'.$fn;
1.5 www 224: my $vfn=$fn;
225: if ($version ne 'new') {
1.31 albertel 226: $vfn=~s/\.(\Q$suffix\E)$/\.$version\.$1/;
1.5 www 227: }
1.31 albertel 228:
1.5 www 229: my $csource=$r->dir_config('lonDocRoot').'/res/'.$udom.'/'.$uname.$vfn;
1.31 albertel 230:
231: my $logname = $ctarget;
232: if ($is_meta) { $logname =~ s/\.meta$//; }
233: $logname = $ctarget.'.log';
234: unless ($logfile=Apache::File->new('>>'.$logname)) {
1.36 bisitz 235: $r->print('<span class="LC_error">'
236: .&mt('No write permission to user directory, FAIL')
237: .'</span>');
1.4 www 238: }
239: print $logfile
240: "\n\n================= Retrieve ".localtime()." ================\n".
1.5 www 241: "Version: $version\nSource: $csource\nTarget: $ctarget\n";
1.23 www 242: $r->print('<p>'.&mt('Copying file').': ');
1.31 albertel 243: if (copy($csource,$ctarget)) {
1.36 bisitz 244: $r->print('<span class="LC_success">'
245: .&mt('ok')
246: .'</span>');
1.5 www 247: print $logfile "Copied sucessfully.\n\n";
248: } else {
249: my $error=$!;
1.36 bisitz 250: $r->print('<span class="LC_error">'
251: .&mt('Copy failed: [_1]',$error)
252: .'</span>');
1.5 www 253: print $logfile "Copy failed: $error\n\n";
254: }
1.36 bisitz 255: $r->print('</p>'
256: .'<p><a href="/priv/'.$uname.$fn.'">'
257: .&mt('Back to [_1]',$fn)
258: .'</a></p>');
1.4 www 259: } else {
1.36 bisitz 260: $r->print('<p class="LC_info">'.&mt('Please pick a version to retrieve:').'</p>');
1.4 www 261: &phaseone($r,$fn,$uname,$udom);
262: }
263: }
264:
1.31 albertel 265: sub get_file_info {
266: my ($fn) = @_;
267: my ($main,$suffix) = ($fn=~/\/([^\/]+)\.(\w+)$/);
268: my $is_meta=0;
269: if ($suffix eq 'meta') {
270: $is_meta = 1;
271: ($main,$suffix) = ($main=~/(.+)\.(\w+)$/);
272: $suffix .= '.meta';
273: }
274: return ($main,$suffix,$is_meta);
275: }
276:
1.16 harris41 277: # ---------------------------------------------------------------- Main Handler
1.1 www 278: sub handler {
279:
280: my $r=shift;
281:
282: my $fn;
1.14 www 283:
284:
285: # Get query string for limited number of parameters
286:
1.17 stredwic 287: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.18 www 288: ['filename']);
1.1 www 289:
1.27 albertel 290: if ($env{'form.filename'}) {
291: $fn=$env{'form.filename'};
1.37 raeburn 292: $fn=~s/^https?\:\/\/[^\/]+//;
1.1 www 293: } else {
1.27 albertel 294: $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
1.2 www 295: ' unspecified filename for retrieval', $r->filename);
296: return HTTP_NOT_FOUND;
1.1 www 297: }
298:
299: unless ($fn) {
1.27 albertel 300: $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
1.2 www 301: ' trying to retrieve non-existing file', $r->filename);
1.1 www 302: return HTTP_NOT_FOUND;
303: }
304:
305: # ----------------------------------------------------------- Start page output
1.10 www 306: my $uname;
307: my $udom;
1.1 www 308:
1.13 www 309: ($uname,$udom)=
310: &Apache::loncacc::constructaccess($fn,$r->dir_config('lonDefDomain'));
311: unless (($uname) && ($udom)) {
1.10 www 312: $r->log_reason($uname.' at '.$udom.
1.27 albertel 313: ' trying to publish file '.$env{'form.filename'}.
1.10 www 314: ' ('.$fn.') - not authorized',
315: $r->filename);
316: return HTTP_NOT_ACCEPTABLE;
317: }
318:
1.34 albertel 319: $fn=~s{/~($LONCAPA::username_re)}{};
1.1 www 320:
1.23 www 321: &Apache::loncommon::content_type($r,'text/html');
1.1 www 322: $r->send_http_header;
323:
1.30 albertel 324: $r->print(&Apache::loncommon::start_page('Retrieve Published Resources'));
1.1 www 325:
326:
1.36 bisitz 327: $r->print('<h1>'
328: .&mt('Retrieve previous versions of [_1]'
329: ,'<span class="LC_filename">'.$fn.'</span>')
330: .'</h1>');
1.10 www 331:
1.27 albertel 332: if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
1.32 albertel 333: $r->print('<h3><span class="LC_diff_coauthor">'.&mt('Co-Author').': '.$uname.
1.23 www 334: &mt(' at ').$udom.
1.32 albertel 335: '</span></h3>');
1.10 www 336: }
337:
1.1 www 338:
1.27 albertel 339: if ($env{'form.phase'} eq 'two') {
1.4 www 340: &phasetwo($r,$fn,$uname,$udom);
1.2 www 341: } else {
342: &phaseone($r,$fn,$uname,$udom);
343: }
1.1 www 344:
1.30 albertel 345: $r->print(&Apache::loncommon::end_page());
1.1 www 346: return OK;
347: }
1.7 www 348:
349: 1;
350: __END__
1.16 harris41 351:
352:
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