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Diff for /loncom/publisher/lonretrieve.pm between versions 1.1 and 1.22

version 1.1, 2001/04/01 02:58:51 version 1.22, 2003/05/19 21:53:03
Line 1 Line 1
 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # Handler to retrieve an old version of a file  # Handler to retrieve an old version of a file
 #  #
   # $Id$
   #
   # 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  # (Publication Handler
 #   # 
 # (TeX Content Handler  # (TeX Content Handler
 #  #
   # YEAR=2000
 # 05/29/00,05/30,10/11 Gerd Kortemeyer)  # 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  # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
   # YEAR=2001
 # 03/23 Guy Albertelli  # 03/23 Guy Albertelli
 # 03/24,03/29 Gerd Kortemeyer)  # 03/24,03/29 Gerd Kortemeyer)
 #  #
 # 03/31 Gerd Kortemeyer  # 03/31,04/03,05/02,05/09,06/23,08/20 Gerd Kortemeyer
   #
   ###
   
 package Apache::lonretrieve;  package Apache::lonretrieve;
   
Line 19  use strict; Line 48  use strict;
 use Apache::File;  use Apache::File;
 use File::Copy;  use File::Copy;
 use Apache::Constants qw(:common :http :methods);  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');
   
       my $urldir='/res/'.$udom.'/'.$uname.$fn;
       $urldir=~s/\/[^\/]+$/\//;
   
       my $resfn=$docroot.'/res/'.$udom.'/'.$uname.$fn;
       my $resdir=$resfn;
       $resdir=~s/\/[^\/]+$/\//;
   
       $fn=~/\/([^\/]+)\.(\w+)$/;
       my $main=$1;
       my $suffix=$2;
   
       if (-e $resfn) {  
       $r->print('<form action=/adm/retrieve method=post>'.
         '<input type=hidden name=filename value="/~'.$uname.$fn.'">'.
                 '<input type=hidden name=phase value=two>'.
                 '<table border=2><tr><th>Select</th><th>Version</th>'.
                 '<th>Became this version on ...</th>'.
                 '<th>Metadata</th></tr>');
       my $filename;
       opendir(DIR,$resdir);
       while ($filename=readdir(DIR)) {
           if ($filename=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/) {
      my $version=$1;
              my ($rdev,$rino,$rmode,$rnlink,
                   $ruid,$rgid,$rrdev,$rsize,
                   $ratime,$rmtime,$rctime,
                   $rblksize,$rblocks)=stat($resdir.'/'.$filename);
              $r->print('<tr><td><input type=radio name=version value="'.
                        $version.'"></td><th>'.$version.'</th><td>'.
                        localtime($rmtime).'</td><td>'.
                        '<a href="'.$urldir.$filename.'.meta" target=cat>'.
                        'Metadata Version '.$version.'</a>');
              if (&Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
                  $r->print(
                       '&nbsp;&nbsp;<a target=cat href="/adm/diff?filename=/~'.
                           $uname.$fn.
                           '&versiontwo=priv&versiontwo='.$version.
                           '">Diffs with Version '.$version.'</a>');
              }
              $r->print('</a></td></tr>');
           }
       }
       closedir(DIR);
       my ($rdev,$rino,$rmode,$rnlink,
           $ruid,$rgid,$rrdev,$rsize,
           $ratime,$rmtime,$rctime,
           $rblksize,$rblocks)=stat($resfn);
       $r->print('<tr><td><input type=radio name=version value="new"></td>'.
                 '<th>Current</th><td>'.localtime($rmtime).
              '</td><td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target=cat>'.
                 'Metadata current version</a>');           
              if (&Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
                  $r->print(
                       '&nbsp;&nbsp;<a target=cat href="/adm/diff?filename=/~'.
                           $uname.$fn.
                           '&versiontwo=priv'.
                           '">Diffs with current Version</a>');
              }
              $r->print('</td></tr></table><p>'.
              '<font size=+1 color=red>Retrieval of an old version will '.
              'overwrite the file currently in construction space</font><p>'.
              '<input type=submit value="Retrieve version"></form>');
   } else {
       $r->print('<h3>No previous versions published.</h3>');
   }
   }
   
   # ---------------------------------- 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('<h3>Retrieving current (most recent) version</h3>');
           } else {
               $r->print('<h3>Retrieving old version '.$version.'</h3>');
           }
           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(
            '<font color=red>No write permission to user directory, FAIL</font>');
           }
           print $logfile 
   "\n\n================= Retrieve ".localtime()." ================\n".
   "Version: $version\nSource: $csource\nTarget: $ctarget\n";
           $r->print('<p>Copying file: ');
           if (copy($csource,$ctarget)) {
       $r->print('ok<p>');
               print $logfile "Copied sucessfully.\n\n";
           } else {
               my $error=$!;
       $r->print('fail, '.$error.'<p>');
               print $logfile "Copy failed: $error\n\n";
           }
           $r->print('<font size=+2><a href="/priv/'.$uname.$fn.
                     '">Back to '.$fn.'</a></font>'); 
       } else {
          $r->print(
      '<font size=+1 color=red>Please pick a version to retrieve</font><p>');
          &phaseone($r,$fn,$uname,$udom);
       }
   }
   
   # ---------------------------------------------------------------- Main Handler
 sub handler {  sub handler {
   
   my $r=shift;    my $r=shift;
   
   my $fn;    my $fn;
   
   
   # Get query string for limited number of parameters
   
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
     ['filename']);
   
   if ($ENV{'form.filename'}) {    if ($ENV{'form.filename'}) {
       $fn=$ENV{'form.filename'};        $fn=$ENV{'form.filename'};
       $fn=~s/^http\:\/\/[^\/]+\/\~(\w+)/\/home\/$1\/public_html/;        $fn=~s/^http\:\/\/[^\/]+//;
       $fn=~s/\/[^\/]+$//;  
   } else {    } else {
       $fn=$r->filename();       $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
            ' unspecified filename for retrieval', $r->filename); 
        return HTTP_NOT_FOUND;
   }    }
        
   
   unless ($fn) {     unless ($fn) { 
      $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.       $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
          ' trying to publish empty directory', $r->filename);            ' trying to retrieve non-existing file', $r->filename); 
      return HTTP_NOT_FOUND;       return HTTP_NOT_FOUND;
   }     } 
   
 # ----------------------------------------------------------- Start page output  # ----------------------------------------------------------- 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'};    $fn=~s/\/\~(\w+)//;
   my $udom=$ENV{'user.domain'};  
   
   $r->content_type('text/html');    $r->content_type('text/html');
   $r->send_http_header;    $r->send_http_header;
   
   $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');    $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
   
   $r->print(    $r->print(&Apache::loncommon::bodytag('Retrieve Published Resources'));
    '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');  
   
   my $thisdisfn=$fn;  
   $thisdisfn=~s/^\/home\/$uname\/public_html//;  
       
   $r->print('<h1>Construction Space Directory <tt>'.$thisdisfn.'</tt></h1>');    $r->print('<h1>Retrieve previous versions of <tt>'.$fn.'</tt></h1>');
     
   my $docroot=$r->dir_config('lonDocRoot');    if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
             $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.
                  '</font></h3>');
     }
   
   my $resdir=$docroot.'/res/'.$udom.'/'.$uname.$thisdisfn;  
   my $linkdir='/~'.$uname.$thisdisfn;  
   
     my $filename;  
     opendir(DIR,$fn);  
        while ($filename=readdir(DIR)) {  
            $filename=~/\.(\w+)$/;  
            if (($1 ne 'meta') && ($1 ne 'save') && ($1 ne 'log')) {  
       $r->print($resdir.' - '.$linkdir.' = '.$filename.'<br>');  
    }  
        }  
     closedir(DIR);  
   
     if ($ENV{'form.phase'} eq 'two') {
         &phasetwo($r,$fn,$uname,$udom);
     } else {
         &phaseone($r,$fn,$uname,$udom);
     }
   
   $r->print('</body></html>');    $r->print('</body></html>');
   return OK;      return OK;  
 }  }
   
   1;
   __END__
   
   =head1 NAME
   
   Apache::lonretrieve - retrieves an old version of a file
   
   =head1 SYNOPSIS
   
   Invoked by /etc/httpd/conf/srm.conf:
   
    <Location /adm/retrieve>
    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
    </Location>
   
   =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
Removed from v.1.1  
changed lines
  Added in v.1.22

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