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File:  [LON-CAPA] / loncom / publisher / londiff.pm
Revision 1.8: download - view: text, annotated - select for diffs
Wed May 29 18:23:58 2002 UTC (22 years ago) by stredwic
Branches: MAIN
CVS tags: version_0_5_1, version_0_5, version_0_4, stable_2002_july, STABLE, HEAD
See Bug 90.  Update QUERY_STRING updates to using get_unprocessed_cgi.

    1: # The LearningOnline Network with CAPA
    2: # Handler to show differences between file versions
    3: #
    4: # $Id: londiff.pm,v 1.8 2002/05/29 18:23:58 stredwic Exp $
    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: #
   29: # (Handler to retrieve an old version of a file
   30: #
   31: # (Publication Handler
   32: # 
   33: # (TeX Content Handler
   34: #
   35: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
   36: #
   37: # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
   38: # 03/23 Guy Albertelli
   39: # 03/24,03/29 Gerd Kortemeyer)
   40: #
   41: # 03/31,04/03 Gerd Kortemeyer)
   42: #
   43: # 05/02/01,05/09 Gerd Kortemeyer
   44: # 12/13 Scott Harrison
   45: #
   46: ###
   47: 
   48: package Apache::londiff;
   49: 
   50: use strict;
   51: use Apache::File;
   52: use File::Copy;
   53: use Algorithm::Diff qw(diff);
   54: use Apache::Constants qw(:common :http :methods);
   55: use Apache::loncacc;
   56: use Apache::lonnet();
   57: use Apache::loncommon();
   58: 
   59: sub handler {
   60: 
   61:   my $r=shift;
   62: 
   63: # Get query string for limited number of parameters
   64: 
   65:    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
   66:                                        ['filename','versiontwo','versionone']);
   67: # Get the files
   68: 
   69:   my $cuname=$ENV{'user.name'};
   70:   my $cudom=$ENV{'user.domain'};
   71: 
   72:   unless (($cuname,$cudom)=
   73:     &Apache::loncacc::constructaccess($ENV{'form.filename'},
   74:                                       $r->dir_config('lonDefDomain'))) {
   75:      $r->log_reason($cuname.' at '.$cudom.
   76:          ' trying to get diffs file '.$ENV{'form.filename'}.
   77:          '  - not authorized', 
   78:          $r->filename); 
   79:      return HTTP_NOT_ACCEPTABLE;
   80:   }
   81: 
   82:   my $efn=$ENV{'form.filename'};
   83: 
   84:   $efn=~s/\/\~(\w+)//g;
   85: 
   86:   my @f1=();
   87:   my @f2=();
   88: 
   89:   $r->content_type('text/html');
   90:   $r->send_http_header;
   91: 
   92:   $r->print('<html><head><title>LON-CAPA Construction Diffs</title></head>');
   93: 
   94:   $r->print('<body bgcolor="#FFFFFF">');
   95: 
   96:   
   97:   $r->print('<h1>Compare versions of <tt>'.$efn.'</tt></h1>');
   98:    
   99:        if (($cuname ne $ENV{'user.name'}) || ($cudom ne $ENV{'user.domain'})) {
  100:           $r->print('<h3><font color=red>Co-Author: '.$cuname.' at '.$cudom.
  101:                '</font></h3>');
  102:       }
  103: 
  104: 
  105:  if (&Apache::loncommon::fileembstyle(($efn=~/\.(\w+)$/)) eq
  106:       'ssi') {
  107:   if ($ENV{'form.versionone'} eq 'priv') {
  108:       my $fn='/home/'.$cuname.'/public_html/'.$efn;
  109:       if (-e $fn) {
  110: 	  my $fh=Apache::File->new($fn);
  111:           my $line;
  112:           while($line=<$fh>) {
  113:              chomp($line);
  114:              $f1[$#f1+1]=$line;
  115: 	 }
  116:       }
  117:       $r->print('<h3>Construction Space Version</h3>');
  118:   } else {
  119:       my $fn=
  120:        '/home/httpd/html//res/'.$cudom.'/'.$cuname.'/';
  121:       if ($ENV{'form.versionone'}) {
  122:          my ($main,$suffix)=($efn=~/^(.+)\.(\w+)$/);
  123:          $fn.=$main.'.'.$ENV{'form.versionone'}.'.'.$suffix;
  124: 	 $r->print('<h3>Version '.$ENV{'form.versionone'}.'</h3>');
  125:       } else {
  126:          $fn.=$efn;
  127: 	 $r->print('<h3>Current Version</h3>');
  128:       }
  129:       @f1=split(/\n/,&Apache::lonnet::getfile($fn));      
  130:   }
  131: 
  132:   $r->print('versus');
  133: 
  134:   if ($ENV{'form.versiontwo'} eq 'priv') {
  135:       my $fn='/home/'.$cuname.'/public_html/'.$efn;
  136:       if (-e $fn) {
  137: 	  my $fh=Apache::File->new($fn);
  138:           my $line;
  139:           while($line=<$fh>) {
  140:              chomp($line);
  141:              $f2[$#f2+1]=$line;
  142: 	 }
  143:       }
  144:       $r->print('<h3>Construction Space Version</h3>');
  145:   } else {
  146:       my $fn=
  147:        '/home/httpd/html/res/'.$cudom.'/'.$cuname.'/';
  148:       if ($ENV{'form.versiontwo'}) {
  149:          my ($main,$suffix)=($efn=~/^(.+)\.(\w+)$/);
  150:          $fn.=$main.'.'.$ENV{'form.versiontwo'}.'.'.$suffix;
  151: 	 $r->print('<h3>Version '.$ENV{'form.versiontwo'}.'</h3>');
  152:       } else {
  153:          $fn.=$efn;
  154: 	 $r->print('<h3>Current Version</h3>');
  155:       }
  156:       @f2=split(/\n/,&Apache::lonnet::getfile($fn));      
  157:   }
  158: 
  159: # Run diff
  160: 
  161:   my $diffs = diff(\@f1, \@f2);
  162: 
  163: # Start page output
  164: 
  165:   my $chunk;
  166:   my $line;
  167: 
  168:   $r->print('<pre>');
  169: 
  170:   foreach $chunk (@$diffs) {
  171: 
  172:     foreach $line (@$chunk) {
  173:       my ($sign, $lineno, $text) = @$line;
  174:       $text=~s/\</\&lt\;/g;
  175:       $text=~s/\>/\&gt\;/g;
  176:       $lineno=substr($lineno.'        ',0,7);
  177:       $r->print('<font color='.(($sign eq '+')?'green':'red').'>'.
  178:                 $sign.' '.$lineno.' '.$text."</font>\n");
  179:     }
  180:     $r->print("<hr>\n");
  181:   }
  182:   $r->print('</pre>');
  183: 
  184: } else {
  185:     $r->print('<h1><font color=red>Binary File</font></h1>');
  186: }
  187:   $r->print('</body></html>');
  188:   return OK;  
  189: }
  190: 
  191: 
  192: 1;
  193: __END__
  194: 
  195: 
  196: 
  197:
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