Annotation of loncom/publisher/lonretrieve.pm, revision 1.22
1.1 www 1: # The LearningOnline Network with CAPA
2: # Handler to retrieve an old version of a file
3: #
1.22 ! albertel 4: # $Id: lonretrieve.pm,v 1.21 2003/02/03 18:03:53 harris41 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: #
1.1 www 29: # (Publication Handler
30: #
31: # (TeX Content Handler
32: #
1.16 harris41 33: # YEAR=2000
1.1 www 34: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
35: #
36: # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
1.16 harris41 37: # YEAR=2001
1.1 www 38: # 03/23 Guy Albertelli
39: # 03/24,03/29 Gerd Kortemeyer)
40: #
1.14 www 41: # 03/31,04/03,05/02,05/09,06/23,08/20 Gerd Kortemeyer
1.16 harris41 42: #
43: ###
1.1 www 44:
45: package Apache::lonretrieve;
46:
47: use strict;
48: use Apache::File;
49: use File::Copy;
50: use Apache::Constants qw(:common :http :methods);
1.10 www 51: use Apache::loncacc;
1.16 harris41 52: use Apache::loncommon();
1.1 www 53:
1.16 harris41 54: # ------------------------------------ Interface for selecting previous version
1.2 www 55: sub phaseone {
56: my ($r,$fn,$uname,$udom)=@_;
57: my $docroot=$r->dir_config('lonDocRoot');
58:
1.3 www 59: my $urldir='/res/'.$udom.'/'.$uname.$fn;
60: $urldir=~s/\/[^\/]+$/\//;
61:
62: my $resfn=$docroot.'/res/'.$udom.'/'.$uname.$fn;
63: my $resdir=$resfn;
1.2 www 64: $resdir=~s/\/[^\/]+$/\//;
65:
1.6 www 66: $fn=~/\/([^\/]+)\.(\w+)$/;
1.2 www 67: my $main=$1;
68: my $suffix=$2;
1.6 www 69:
70: if (-e $resfn) {
1.3 www 71: $r->print('<form action=/adm/retrieve method=post>'.
1.12 www 72: '<input type=hidden name=filename value="/~'.$uname.$fn.'">'.
1.3 www 73: '<input type=hidden name=phase value=two>'.
74: '<table border=2><tr><th>Select</th><th>Version</th>'.
75: '<th>Became this version on ...</th>'.
76: '<th>Metadata</th></tr>');
1.2 www 77: my $filename;
78: opendir(DIR,$resdir);
79: while ($filename=readdir(DIR)) {
1.22 ! albertel 80: if ($filename=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/) {
1.3 www 81: my $version=$1;
82: my ($rdev,$rino,$rmode,$rnlink,
83: $ruid,$rgid,$rrdev,$rsize,
84: $ratime,$rmtime,$rctime,
85: $rblksize,$rblocks)=stat($resdir.'/'.$filename);
86: $r->print('<tr><td><input type=radio name=version value="'.
87: $version.'"></td><th>'.$version.'</th><td>'.
88: localtime($rmtime).'</td><td>'.
89: '<a href="'.$urldir.$filename.'.meta" target=cat>'.
1.9 www 90: 'Metadata Version '.$version.'</a>');
1.16 harris41 91: if (&Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
1.8 www 92: $r->print(
1.11 www 93: ' <a target=cat href="/adm/diff?filename=/~'.
94: $uname.$fn.
1.20 albertel 95: '&versiontwo=priv&versiontwo='.$version.
1.8 www 96: '">Diffs with Version '.$version.'</a>');
97: }
98: $r->print('</a></td></tr>');
1.2 www 99: }
100: }
101: closedir(DIR);
1.3 www 102: my ($rdev,$rino,$rmode,$rnlink,
103: $ruid,$rgid,$rrdev,$rsize,
104: $ratime,$rmtime,$rctime,
105: $rblksize,$rblocks)=stat($resfn);
106: $r->print('<tr><td><input type=radio name=version value="new"></td>'.
107: '<th>Current</th><td>'.localtime($rmtime).
108: '</td><td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target=cat>'.
1.9 www 109: 'Metadata current version</a>');
1.16 harris41 110: if (&Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
1.9 www 111: $r->print(
1.11 www 112: ' <a target=cat href="/adm/diff?filename=/~'.
113: $uname.$fn.
1.20 albertel 114: '&versiontwo=priv'.
1.9 www 115: '">Diffs with current Version</a>');
116: }
117: $r->print('</td></tr></table><p>'.
1.4 www 118: '<font size=+1 color=red>Retrieval of an old version will '.
119: 'overwrite the file currently in construction space</font><p>'.
1.3 www 120: '<input type=submit value="Retrieve version"></form>');
1.6 www 121: } else {
122: $r->print('<h3>No previous versions published.</h3>');
123: }
1.2 www 124: }
1.1 www 125:
1.16 harris41 126: # ---------------------------------- Interface for presenting specified version
1.4 www 127: sub phasetwo {
128: my ($r,$fn,$uname,$udom)=@_;
129: if ($ENV{'form.version'}) {
130: my $version=$ENV{'form.version'};
131: if ($version eq 'new') {
132: $r->print('<h3>Retrieving current (most recent) version</h3>');
133: } else {
134: $r->print('<h3>Retrieving old version '.$version.'</h3>');
135: }
136: my $logfile;
137: my $ctarget='/home/'.$uname.'/public_html'.$fn;
1.5 www 138: my $vfn=$fn;
139: if ($version ne 'new') {
140: $vfn=~s/\.(\w+)$/\.$version\.$1/;
141: }
142: my $csource=$r->dir_config('lonDocRoot').'/res/'.$udom.'/'.$uname.$vfn;
1.4 www 143: unless ($logfile=Apache::File->new('>>'.$ctarget.'.log')) {
144: $r->print(
145: '<font color=red>No write permission to user directory, FAIL</font>');
146: }
147: print $logfile
148: "\n\n================= Retrieve ".localtime()." ================\n".
1.5 www 149: "Version: $version\nSource: $csource\nTarget: $ctarget\n";
150: $r->print('<p>Copying file: ');
151: if (copy($csource,$ctarget)) {
152: $r->print('ok<p>');
153: print $logfile "Copied sucessfully.\n\n";
154: } else {
155: my $error=$!;
156: $r->print('fail, '.$error.'<p>');
157: print $logfile "Copy failed: $error\n\n";
158: }
159: $r->print('<font size=+2><a href="/priv/'.$uname.$fn.
160: '">Back to '.$fn.'</a></font>');
1.4 www 161: } else {
162: $r->print(
163: '<font size=+1 color=red>Please pick a version to retrieve</font><p>');
164: &phaseone($r,$fn,$uname,$udom);
165: }
166: }
167:
1.16 harris41 168: # ---------------------------------------------------------------- Main Handler
1.1 www 169: sub handler {
170:
171: my $r=shift;
172:
173: my $fn;
1.14 www 174:
175:
176: # Get query string for limited number of parameters
177:
1.17 stredwic 178: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.18 www 179: ['filename']);
1.1 www 180:
181: if ($ENV{'form.filename'}) {
182: $fn=$ENV{'form.filename'};
1.10 www 183: $fn=~s/^http\:\/\/[^\/]+//;
1.1 www 184: } else {
1.2 www 185: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
186: ' unspecified filename for retrieval', $r->filename);
187: return HTTP_NOT_FOUND;
1.1 www 188: }
189:
190: unless ($fn) {
191: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
1.2 www 192: ' trying to retrieve non-existing file', $r->filename);
1.1 www 193: return HTTP_NOT_FOUND;
194: }
195:
196: # ----------------------------------------------------------- Start page output
1.10 www 197: my $uname;
198: my $udom;
1.1 www 199:
1.13 www 200: ($uname,$udom)=
201: &Apache::loncacc::constructaccess($fn,$r->dir_config('lonDefDomain'));
202: unless (($uname) && ($udom)) {
1.10 www 203: $r->log_reason($uname.' at '.$udom.
204: ' trying to publish file '.$ENV{'form.filename'}.
205: ' ('.$fn.') - not authorized',
206: $r->filename);
207: return HTTP_NOT_ACCEPTABLE;
208: }
209:
210: $fn=~s/\/\~(\w+)//;
1.1 www 211:
212: $r->content_type('text/html');
213: $r->send_http_header;
214:
215: $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
216:
1.19 www 217: $r->print(&Apache::loncommon::bodytag('Retrieve Published Resources'));
1.1 www 218:
219:
1.2 www 220: $r->print('<h1>Retrieve previous versions of <tt>'.$fn.'</tt></h1>');
1.10 www 221:
222: if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
223: $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.
224: '</font></h3>');
225: }
226:
1.1 www 227:
1.2 www 228: if ($ENV{'form.phase'} eq 'two') {
1.4 www 229: &phasetwo($r,$fn,$uname,$udom);
1.2 www 230: } else {
231: &phaseone($r,$fn,$uname,$udom);
232: }
1.1 www 233:
234: $r->print('</body></html>');
235: return OK;
236: }
1.7 www 237:
238: 1;
239: __END__
1.16 harris41 240:
241: =head1 NAME
242:
243: Apache::lonretrieve - retrieves an old version of a file
244:
245: =head1 SYNOPSIS
246:
247: Invoked by /etc/httpd/conf/srm.conf:
248:
249: <Location /adm/retrieve>
250: PerlAccessHandler Apache::lonacc
251: SetHandler perl-script
252: PerlHandler Apache::lonretrieve
253: ErrorDocument 403 /adm/login
254: ErrorDocument 404 /adm/notfound.html
255: ErrorDocument 406 /adm/unauthorized.html
256: ErrorDocument 500 /adm/errorhandler
257: </Location>
258:
259: =head1 INTRODUCTION
260:
261: This module retrieves an old published version of a file.
262:
263: This is part of the LearningOnline Network with CAPA project
264: described at http://www.lon-capa.org.
265:
266: =head1 HANDLER SUBROUTINE
267:
268: This routine is called by Apache and mod_perl.
269:
270: =over 4
271:
272: =item *
273:
274: Get query string for limited number of parameters
275:
276: =item *
277:
278: Start page output
279:
280: =item *
281:
282: print phase relevant output
283:
284: =item *
285:
286: (phase one is to select version; phase two retrieves version)
287:
288: =back
289:
290: =head1 OTHER SUBROUTINES
291:
292: =over 4
293:
294: =item *
295:
296: phaseone() : Interface for selecting previous version.
297:
298: =item *
299:
300: phasetwo() : Interface for presenting specified version.
301:
302: =back
303:
304: =cut
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