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Diff for /loncom/publisher/londiff.pm between versions 1.1 and 1.37

version 1.1, 2001/05/02 21:01:47 version 1.37, 2013/06/04 22:20:16
Line 1 Line 1
 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # Handler to show differences between file versions  # Handler to show differences between file versions
 #  #
 # (Handler to retrieve an old version of a file  # $Id$
 #  #
 # (Publication Handler  # Copyright Michigan State University Board of Trustees
 #   
 # (TeX Content Handler  
 #  #
 # 05/29/00,05/30,10/11 Gerd Kortemeyer)  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
 #  #
 # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer  # LON-CAPA is free software; you can redistribute it and/or modify
 # 03/23 Guy Albertelli  # it under the terms of the GNU General Public License as published by
 # 03/24,03/29 Gerd Kortemeyer)  # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
 #  #
 # 03/31,04/03 Gerd Kortemeyer)  # 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.
 #  #
 # 05/02/01 Gerd Kortemeyer  # 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/
   #
   ###
   
   
   
   
 package Apache::londiff;  package Apache::londiff;
   
 use strict;  use strict;
 use Apache::File;  use Apache::File;
 use File::Copy;  use File::Copy;
   use File::Compare;
 use Algorithm::Diff qw(diff);  use Algorithm::Diff qw(diff);
 use Apache::Constants qw(:common :http :methods);  use Apache::Constants qw(:common :http :methods);
   use Apache::lonnet;
   use Apache::loncommon();
   use Apache::lonretrieve();
   use Apache::lonlocal;
   use LONCAPA();
   
   sub get_split_file {
       my ($fn,$style)=@_;
       my $f1;
       my @f1;
       if ($style eq 'local') {
    if (-e $fn) {
       my $fh=Apache::File->new($fn);
       my $line;
       while($line=<$fh>) {
    $f1.=$line;
       }
    }
       } elsif ($style eq 'remote') {
    $f1=&Apache::lonnet::getfile($fn);
       }
       @f1=split(/\r\n|\r|\n/,$f1);
       return @f1;
   }
   
   sub are_different_files {
       my ($fileone,$filetwo)=@_;
       return &compare($fileone,$filetwo);
   }
   
 sub handler {  sub handler {
   
   my $r=shift;      my $r=shift;
   
 # Get query string for limited number of parameters  # Get query string for limited number of parameters
   
     map {      &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
        my ($name, $value) = split(/=/,$_);      ['filename','versiontwo',
        $value =~ tr/+/ /;       'versionone','filetwo']);
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;  
        if (($name eq 'filename') || ($name eq 'versiontwo') ||   # Check permissions
            ($name eq 'versionone')) {      my $allowed=0;
            unless ($ENV{'form.'.$name}) {      my $cuname=$env{'user.name'};
               $ENV{'form.'.$name}=$value;      my $cudom=$env{'user.domain'};
    }  
        }      if ($env{'form.filename'}=~ m{^/res/}) {
     } (split(/&/,$ENV{'QUERY_STRING'}));          if (&Apache::lonnet::allowed('bre',$env{'form.filename'})) {
               if ($env{'request.course.id'}) {
                   if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
                       $allowed = 1;
                   }
               } else {
                   $allowed = 1;
               }
           } elsif (&Apache::lonnet::allowed('bro',$env{'form.filename'})) {
               $allowed = 1;
           }
           if ($allowed) {
               ($cudom,$cuname,$env{'form.filename'})=
                   ($env{'form.filename'}=~m{^/res/($LONCAPA::domain_re)/($LONCAPA::username_re)(/.*)$});
   
               if (($env{'form.versionone'} eq 'priv') || ($env{'form.versiontwo'} eq 'priv')) {
                   my ($cstrname,$cstrdom) =
                       &Apache::lonnet::constructaccess("/priv/$cudom/$cuname".$env{'form.filename'});
                   unless (($cstrname eq $cuname) && ($cstrdom eq $cudom)) {
                       $allowed = 0;
                   }
               }
           }
       } else {
    ($cuname,$cudom)=
       &Apache::lonnet::constructaccess($env{'form.filename'});
           if ($cuname ne '' && $cudom ne '') {
               $allowed = 1;
           } else {
       $r->log_reason($env{'user.name'}.':'.$env{'user.domain'}.
      ' trying to get diffs file '.$env{'form.filename'}.
      '  - not authorized',
      $r->filename);
    }
       }
       unless ($allowed) {
           return HTTP_NOT_ACCEPTABLE;
       }
   
 # Get the files  # Get the files
   
   my @f1=();      my $efn=$env{'form.filename'};
   my @f2=();      $efn=~s{^/priv/$LONCAPA::domain_re/$LONCAPA::username_re}{};
   
       my @f1=();
       my @f2=();
   
   if ($ENV{'form.versionone'} eq 'priv') {      &Apache::loncommon::content_type($r,'text/html');
       my $fn='/home/'.$ENV{'user.name'}.'/public_html/'.$ENV{'form.filename'};      $r->send_http_header;
       if (-e $fn) {  
   my $fh=Apache::File->new($fn);  
           my $line;  
           while($line=<$fh>) {  
              chomp($line);  
              $f1[$#f1+1]=$line;  
  }  
       }  
   } else {  
       my $fn=  
        '/home/httpd/html//res/'.$ENV{'user.domain'}.'/'.$ENV{'user.name'}.'/';  
       if ($ENV{'form.versionone'}) {  
          my ($main,$suffix)=($ENV{'form.filename'}=~/^(.+)\.(\w+)$/);  
          $fn.=$main.'.'.$ENV{'form.versionone'}.'.'.$suffix;  
       } else {  
          $fn.=$ENV{'form.filename'};  
       }  
       @f1=split(/\n/,&Apache::lonnet::getfile($fn));        
   }  
   
   
   if ($ENV{'form.versiontwo'} eq 'priv') {  
       my $fn='/home/'.$ENV{'user.name'}.'/public_html/'.$ENV{'form.filename'};  
       if (-e $fn) {  
   my $fh=Apache::File->new($fn);  
           my $line;  
           while($line=<$fh>) {  
              chomp($line);  
              $f2[$#f2+1]=$line;  
  }  
       }  
   } else {  
       my $fn=  
        '/home/httpd/html/res/'.$ENV{'user.domain'}.'/'.$ENV{'user.name'}.'/';  
       if ($ENV{'form.versiontwo'}) {  
          my ($main,$suffix)=($ENV{'form.filename'}=~/^(.+)\.(\w+)$/);  
          $fn.=$main.'.'.$ENV{'form.versiontwo'}.'.'.$suffix;  
       } else {  
          $fn.=$ENV{'form.filename'};  
       }  
       @f2=split(/\n/,&Apache::lonnet::getfile($fn));        
   }  
   
       $r->print(&Apache::loncommon::start_page('Resource Differences',undef,
                                                {'no_nav_bar'  => 1, }));
     
       $r->print(($env{'form.filetwo'}?'':&mt('Compare versions of')).
         ' <span class="LC_filename">'.$efn.'</span>');
      
       if (($cuname ne $env{'user.name'}) || ($cudom ne $env{'user.domain'})) {
           my $nameshown = &Apache::loncommon::plainname($cuname,$cudom).
                           ' ('.$cuname.':'.$cudom.')';
           $r->print('<p><span class="LC_info">');
           if ($env{'request.role'} =~ /^ca\./) {
               $r->print(&mt('Co-Author in Authoring Space for: [_1]',$nameshown));
           } elsif ($env{'request.role'} =~ /^aa\./) {
               $r->print(&mt('Assistant Author in Authoring Space for: [_1]',$nameshown));
           } else {
               $r->print(&mt('Resource Author is: [_1]',$nameshown));
           }
           $r->print('</span></p>');
       }
   
       if (&Apache::loncommon::fileembstyle(($efn=~/\.(\w+)$/)) eq 'ssi'
    || $efn =~ /\.meta$/) {
    $r->print('<p><span class="LC_diff_removed">');
    if ($env{'form.versionone'} eq 'priv') {
       my $fn=$r->dir_config('lonDocRoot')."/priv/$cudom/$cuname".$efn;
       @f1=&get_split_file($fn,'local');
       $r->print('<b>'.&mt('Authoring Space Version').'</b>');
    } else {
       my $fn=$r->dir_config('lonDocRoot')."/res/$cudom/$cuname";
       if ($env{'form.versionone'}) {
    my ($main,$suffix,$is_meta)=
       &Apache::lonretrieve::get_file_info($efn);
   
    $fn.=($efn =~m|(.*/)[^/]+|)[0];
    # add on to $fn the path information in $efn
    $fn.=$main.'.'.$env{'form.versionone'}.'.'.$suffix;
    $r->print('<b>'.&mt('Version').' '.$env{'form.versionone'}.'</b>');
       } else {
    $fn.=$efn;
    $r->print('<b>'.&mt('Current Version').'</b>');
       }
       @f1=&get_split_file($fn,'remote');
    }
   
    $r->print('</span><br />'.&mt('versus').'<br /><span class="LC_diff_added">');
   
    if ($env{'form.filetwo'}) {
       my $efn2=$env{'form.filetwo'};
       $efn2=~s{^/priv/$LONCAPA::domain_re/$LONCAPA::username_re}{};
       my $fn=$r->dir_config('lonDocRoot')."/priv/$cudom/$cuname".$efn2;
       @f2=&get_split_file($fn,'local');
       $r->print('<tt>'.$efn2.'</tt>');
    } elsif ($env{'form.versiontwo'} eq 'priv') {
       my $fn=$r->dir_config('lonDocRoot')."/priv/$cudom/$cuname".$efn;
       @f2=&get_split_file($fn,'local');
       $r->print('<b>'.&mt('Authoring Space Version').'</b>');
    } else {
       my $fn=$r->dir_config('lonDocRoot')."/res/$cudom/$cuname/";
       if ($env{'form.versiontwo'}) {
    my ($main,$suffix,$is_meta)=
       &Apache::lonretrieve::get_file_info($efn);
    # add on to $fn the path information in $efn
    $fn.=($efn =~m|(.*/)[^/]+|)[0];
    $fn.=$main.'.'.$env{'form.versiontwo'}.'.'.$suffix;
    $r->print('<b>'.&mt('Version').' '.$env{'form.versiontwo'}.'</b>');
       } else {
    $fn.=$efn;
    $r->print('<b>'.&mt('Current Version').'</b>');
       }
       @f2=&get_split_file($fn,'remote');
    }
    $r->print('</span></p>');
 # Run diff  # Run diff
   
   my $diffs = diff(\@f1, \@f2);   my $diffs = diff(\@f1, \@f2);
   
 # Start page output          if (@$diffs) {
               # Start page output
               my $chunk;
               my $line;
               $r->print('<pre>');
               foreach $chunk (@$diffs) {
                   foreach $line (@$chunk) {
                       my ($sign, $lineno, $text) = @$line;
                       $text=&HTML::Entities::encode($text,'<>&"');
                       $lineno=substr($lineno.'        ',0,7);
                       $r->print('<span class="'.(($sign eq '+')?'LC_diff_added'
                                                                :'LC_diff_removed').'">'.
                                 $sign.' '.$lineno.' '.$text."</span>\n");
                   }
                   $r->print("</pre><hr /><pre>\n");
               }
               $r->print('</pre>');
           } else {
               $r->print('<p class="LC_info">'.&mt('No differences found').'</p>');
           }
       } else {
    $r->print('<h1><span class="LC_warning">'.&mt('Binary File').'</span></h1>');
       }
       $r->print(&Apache::loncommon::end_page()); 
       return OK;  
   }
   
   $r->content_type('text/html');  
   $r->send_http_header;  
   
   $r->print('<html><head><title>LON-CAPA Construction Diffs</title></head>');  1;
   __END__
   
   $r->print('<body bgcolor="#FFFFFF">');  
   
     =pod
   $r->print('<h1>Compare versions of <tt>'.$ENV{'form.filename'}.'</tt></h1>');  
   
   my $chunk;  =head1 NAME
   my $line;  
   
   $r->print('<table border=2><tr><th>Version '.$ENV{'form.versionone'}.  Apache::londiff
                     '</th><th>Version '.$ENV{'form.versiontwo'}.'</th>');  
   foreach $chunk (@$diffs) {  
     $r->print('</pre></tr><tr><td><pre>');  
     my $presign='-';    
     foreach $line (@$chunk) {  
       my ($sign, $lineno, $text) = @$line;  
       if ($sign ne $presign) {  
   $r->print('</pre></td><td><pre>');  
           $presign=$sign;  
       }  
       $text=~s/\</\&lt\;/g;  
       $text=~s/\>/\&gt\;/g;  
       $lineno=substr($lineno.'        ',0,8);  
       $r->print($lineno.' '.$text."\n");  
     }  
   }  
   
   $r->print('</tr></table>');  =head1 SYNOPSIS
   
   $r->print('</body></html>');  Handler to show difference between two files.
   return OK;    
 }  
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
 1;  =head1 Subroutines
 __END__  
   =over
   
   =item get_split_file()
   
   =item are_different_files()
   
   =item handler()
   
   =cut
Removed from v.1.1  
changed lines
  Added in v.1.37

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