--- loncom/publisher/lonretrieve.pm 2001/04/03 21:12:39 1.3
+++ loncom/publisher/lonretrieve.pm 2002/09/16 13:05:50 1.19
@@ -1,17 +1,47 @@
# The LearningOnline Network with CAPA
# Handler to retrieve an old version of a file
#
+# $Id: lonretrieve.pm,v 1.19 2002/09/16 13:05:50 www Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+#
# (Publication Handler
#
# (TeX Content Handler
#
+# YEAR=2000
# 05/29/00,05/30,10/11 Gerd Kortemeyer)
#
# 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
+# YEAR=2001
# 03/23 Guy Albertelli
# 03/24,03/29 Gerd Kortemeyer)
#
-# 03/31,04/03 Gerd Kortemeyer
+# 03/31,04/03,05/02,05/09,06/23,08/20 Gerd Kortemeyer
+# 12/16 Scott Harrison
+#
+###
package Apache::lonretrieve;
@@ -19,7 +49,10 @@ use strict;
use Apache::File;
use File::Copy;
use Apache::Constants qw(:common :http :methods);
+use Apache::loncacc;
+use Apache::loncommon();
+# ------------------------------------ Interface for selecting previous version
sub phaseone {
my ($r,$fn,$uname,$udom)=@_;
my $docroot=$r->dir_config('lonDocRoot');
@@ -31,12 +64,13 @@ sub phaseone {
my $resdir=$resfn;
$resdir=~s/\/[^\/]+$/\//;
- $fn=~/^\/(.+)\.(\w+)$/;
+ $fn=~/\/([^\/]+)\.(\w+)$/;
my $main=$1;
my $suffix=$2;
-
+
+ if (-e $resfn) {
$r->print('');
+} else {
+ $r->print('No previous versions published.
');
+}
}
+# ---------------------------------- Interface for presenting specified version
+sub phasetwo {
+ my ($r,$fn,$uname,$udom)=@_;
+ if ($ENV{'form.version'}) {
+ my $version=$ENV{'form.version'};
+ if ($version eq 'new') {
+ $r->print('Retrieving current (most recent) version
');
+ } else {
+ $r->print('Retrieving old version '.$version.'
');
+ }
+ my $logfile;
+ my $ctarget='/home/'.$uname.'/public_html'.$fn;
+ my $vfn=$fn;
+ if ($version ne 'new') {
+ $vfn=~s/\.(\w+)$/\.$version\.$1/;
+ }
+ my $csource=$r->dir_config('lonDocRoot').'/res/'.$udom.'/'.$uname.$vfn;
+ unless ($logfile=Apache::File->new('>>'.$ctarget.'.log')) {
+ $r->print(
+ 'No write permission to user directory, FAIL');
+ }
+ print $logfile
+"\n\n================= Retrieve ".localtime()." ================\n".
+"Version: $version\nSource: $csource\nTarget: $ctarget\n";
+ $r->print('Copying file: ');
+ if (copy($csource,$ctarget)) {
+ $r->print('ok
');
+ print $logfile "Copied sucessfully.\n\n";
+ } else {
+ my $error=$!;
+ $r->print('fail, '.$error.'
');
+ print $logfile "Copy failed: $error\n\n";
+ }
+ $r->print('Back to '.$fn.'');
+ } else {
+ $r->print(
+ 'Please pick a version to retrieve
');
+ &phaseone($r,$fn,$uname,$udom);
+ }
+}
+
+# ---------------------------------------------------------------- Main Handler
sub handler {
my $r=shift;
my $fn;
+
+# Get query string for limited number of parameters
+
+ &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+ ['filename']);
+
if ($ENV{'form.filename'}) {
$fn=$ENV{'form.filename'};
- $fn=~s/^http\:\/\/[^\/]+\/\~(\w+)//;
+ $fn=~s/^http\:\/\/[^\/]+//;
} else {
$r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
' unspecified filename for retrieval', $r->filename);
@@ -91,22 +195,39 @@ sub handler {
}
# ----------------------------------------------------------- Start page output
+ my $uname;
+ my $udom;
+
+ ($uname,$udom)=
+ &Apache::loncacc::constructaccess($fn,$r->dir_config('lonDefDomain'));
+ unless (($uname) && ($udom)) {
+ $r->log_reason($uname.' at '.$udom.
+ ' trying to publish file '.$ENV{'form.filename'}.
+ ' ('.$fn.') - not authorized',
+ $r->filename);
+ return HTTP_NOT_ACCEPTABLE;
+ }
- my $uname=$ENV{'user.name'};
- my $udom=$ENV{'user.domain'};
+ $fn=~s/\/\~(\w+)//;
$r->content_type('text/html');
$r->send_http_header;
$r->print('
LON-CAPA Construction Space');
- $r->print(
- '
');
+ $r->print(&Apache::loncommon::bodytag('Retrieve Published Resources'));
$r->print('Retrieve previous versions of '.$fn.'
');
+
+ if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
+ $r->print('Co-Author: '.$uname.' at '.$udom.
+ '
');
+ }
+
if ($ENV{'form.phase'} eq 'two') {
+ &phasetwo($r,$fn,$uname,$udom);
} else {
&phaseone($r,$fn,$uname,$udom);
}
@@ -114,3 +235,71 @@ sub handler {
$r->print('');
return OK;
}
+
+1;
+__END__
+
+=head1 NAME
+
+Apache::lonretrieve - retrieves an old version of a file
+
+=head1 SYNOPSIS
+
+Invoked by /etc/httpd/conf/srm.conf:
+
+
+ PerlAccessHandler Apache::lonacc
+ SetHandler perl-script
+ PerlHandler Apache::lonretrieve
+ ErrorDocument 403 /adm/login
+ ErrorDocument 404 /adm/notfound.html
+ ErrorDocument 406 /adm/unauthorized.html
+ ErrorDocument 500 /adm/errorhandler
+
+
+=head1 INTRODUCTION
+
+This module retrieves an old published version of a file.
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+=head1 HANDLER SUBROUTINE
+
+This routine is called by Apache and mod_perl.
+
+=over 4
+
+=item *
+
+Get query string for limited number of parameters
+
+=item *
+
+Start page output
+
+=item *
+
+print phase relevant output
+
+=item *
+
+(phase one is to select version; phase two retrieves version)
+
+=back
+
+=head1 OTHER SUBROUTINES
+
+=over 4
+
+=item *
+
+phaseone() : Interface for selecting previous version.
+
+=item *
+
+phasetwo() : Interface for presenting specified version.
+
+=back
+
+=cut