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File:  [LON-CAPA] / loncom / publisher / lonretrieve.pm
Revision 1.2: download - view: text, annotated - select for diffs
Tue Apr 3 18:12:57 2001 UTC (23 years, 2 months ago) by www
Branches: MAIN
CVS tags: HEAD
Lists previous versions, that's a start

    1: # The LearningOnline Network with CAPA
    2: # Handler to retrieve an old version of a file
    3: #
    4: # (Publication Handler
    5: # 
    6: # (TeX Content Handler
    7: #
    8: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
    9: #
   10: # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
   11: # 03/23 Guy Albertelli
   12: # 03/24,03/29 Gerd Kortemeyer)
   13: #
   14: # 03/31 Gerd Kortemeyer
   15: 
   16: package Apache::lonretrieve;
   17: 
   18: use strict;
   19: use Apache::File;
   20: use File::Copy;
   21: use Apache::Constants qw(:common :http :methods);
   22: 
   23: sub phaseone {
   24:     my ($r,$fn,$uname,$udom)=@_;
   25:     my $docroot=$r->dir_config('lonDocRoot');
   26: 
   27:     my $resdir=$docroot.'/res/'.$udom.'/'.$uname.$fn;
   28:     $resdir=~s/\/[^\/]+$/\//;
   29: 
   30:     $fn=~/^\/(.+)\.(\w+)$/;
   31:     my $main=$1;
   32:     my $suffix=$2;
   33:     
   34:     my $filename;
   35:     opendir(DIR,$resdir);
   36:     while ($filename=readdir(DIR)) {
   37:         if ($filename=~/^$main\.(\d+)\.$suffix$/) {
   38:            $r->print($resdir.' = '.$filename.'<br>');
   39:         }
   40:     }
   41:     closedir(DIR);
   42: }
   43: 
   44: sub handler {
   45: 
   46:   my $r=shift;
   47: 
   48:   my $fn;
   49: 
   50:   if ($ENV{'form.filename'}) {
   51:       $fn=$ENV{'form.filename'};
   52:       $fn=~s/^http\:\/\/[^\/]+\/\~(\w+)//;
   53:   } else {
   54:      $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
   55:          ' unspecified filename for retrieval', $r->filename); 
   56:      return HTTP_NOT_FOUND;
   57:   }
   58: 
   59:   unless ($fn) { 
   60:      $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
   61:          ' trying to retrieve non-existing file', $r->filename); 
   62:      return HTTP_NOT_FOUND;
   63:   } 
   64: 
   65: # ----------------------------------------------------------- Start page output
   66: 
   67:   my $uname=$ENV{'user.name'};
   68:   my $udom=$ENV{'user.domain'};
   69: 
   70:   $r->content_type('text/html');
   71:   $r->send_http_header;
   72: 
   73:   $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
   74: 
   75:   $r->print(
   76:    '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
   77: 
   78:   
   79:   $r->print('<h1>Retrieve previous versions of <tt>'.$fn.'</tt></h1>');
   80: 
   81:   if ($ENV{'form.phase'} eq 'two') {
   82:   } else {
   83:       &phaseone($r,$fn,$uname,$udom);
   84:   }
   85: 
   86:   $r->print('</body></html>');
   87:   return OK;  
   88: }
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