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version 1.4, 2001/05/25 17:03:58 version 1.40, 2008/11/18 19:14:40
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 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # Handler to upload files into construction space  # Handler to upload files into construction space
 #  #
 # (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).
 #  #
 # (Publication Handler  # 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
 # (TeX Content Handler  # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
 #  #
 # 05/29/00,05/30,10/11 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.
 #  #
 # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer  # You should have received a copy of the GNU General Public License
 # 03/23 Guy Albertelli  # along with LON-CAPA; if not, write to the Free Software
 # 03/24,03/29 Gerd Kortemeyer)  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #  #
 # 03/31,04/03 Gerd Kortemeyer)  # /home/httpd/html/adm/gpl.txt
 #  #
 # 04/05,04/09,05/25 Gerd Kortemeyer  # http://www.lon-capa.org/
   #
   ###
   
   =head1 NAME
   
   Apache::lonupload - upload files into construction space
   
   =head1 SYNOPSIS
   
   Invoked by /etc/httpd/conf/srm.conf:
   
    <Location /adm/upload>
    PerlAccessHandler       Apache::lonacc
    SetHandler perl-script
    PerlHandler Apache::lonupload
    ErrorDocument     403 /adm/login
    ErrorDocument     404 /adm/notfound.html
    ErrorDocument     406 /adm/unauthorized.html
    ErrorDocument  500 /adm/errorhandler
    </Location>
   
   =head1 INTRODUCTION
   
   This module uploads a file sitting on a client computer into 
   library server construction space.
   
   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 *
   
   Initialize variables
   
   =item *
   
   Start page output
   
   =item *
   
   output relevant interface phase (phaseone or phasetwo or phasethree)
   
   =item *
   
   (phase one is to specify upload file; phase two is to handle conditions
   subsequent to specification--like overwriting an existing file; phase three
   is to handle processing of secondary uploads - of embedded objects in an
   html file).
   
   =back
   
   =head1 OTHER SUBROUTINES
   
   =over
   
   =item phaseone()
   
   Interface for specifying file to upload.
   
   =item phasetwo()
   
   Interface for handling post-conditions about uploading (such
   as overwriting an existing file).
   
   =item phasethree()
   
   Interface for handling secondary uploads of embedded objects
   in an html file.
   
   =item upfile_store()
   
   Store contents of uploaded file into temporary space.  Invoked
   by phaseone subroutine.
   
   =item check_extension()
   
   Checks if filename extension is permitted and checks type
    of file - if html file, calls parser to check for embedded objects.
    Invoked by phasetwo subroutine.
   
   =back
   
   =cut
   
 package Apache::lonupload;  package Apache::lonupload;
   
 use strict;  use strict;
 use Apache::File;  use Apache::File;
 use File::Copy;  use File::Copy;
   use File::Basename;
 use Apache::Constants qw(:common :http :methods);  use Apache::Constants qw(:common :http :methods);
 use Apache::loncacc;  use Apache::loncacc;
   use Apache::loncommon();
   use Apache::lonnet;
   use HTML::Entities();
   use Apache::lonlocal;
   use Apache::lonnet;
   use LONCAPA();
   
   my $DEBUG=0;
   
   sub Debug {
       # Put out the indicated message but only if DEBUG is true.
       if ($DEBUG) {
    my ($r,$message) = @_;
    $r->log_reason($message);
       }
   }
   
 sub upfile_store {  sub upfile_store {
     my $r=shift;      my $r=shift;
   
     my $fname=$ENV{'form.upfile.filename'};      my $fname=$env{'form.upfile.filename'};
     $fname=~s/\W//g;      $fname=~s/\W//g;
           
     chop($ENV{'form.upfile'});      chomp($env{'form.upfile'});
       
     my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.      my $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
   '_upload_'.$fname.'_'.time.'_'.$$;    '_upload_'.$fname.'_'.time.'_'.$$;
     {      {
        my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').         my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
                                    '/tmp/'.$datatoken.'.tmp');                                     '/tmp/'.$datatoken.'.tmp');
        print $fh $ENV{'form.upfile'};         print $fh $env{'form.upfile'};
     }      }
     return $datatoken;      return $datatoken;
 }  }
   
   
 sub phaseone {  sub phaseone {
     my ($r,$fn,$uname,$udom)=@_;      my ($r,$fn,$uname,$udom,$mode)=@_;
     $fn=~s/\/[^\/]+$//;      my $action = '/adm/upload';
     $fn=~s/([^\/])$/$1\//;      if ($mode eq 'testbank') {
     $fn.=$ENV{'form.upfile.filename'};          $action = '/adm/testbank';
     $fn=~s/^\///;      } elsif ($mode eq 'imsimport') {
     $fn=~s/(\/)+/\//g;          $action = '/adm/imsimport';
       }
     if (($fn) && ($fn!~/\/$/)) {      $env{'form.upfile.filename'}=~s/\\/\//g;
       $r->print(      $env{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
  '<form action=/adm/upload method=post>'.      if ($env{'form.upfile.filename'}) {
  '<input type=hidden name=phase value=two>'.   $fn=~s/\/[^\/]+$//;
  '<input type=hidden name=datatoken value="'.&upfile_store.'">'.   $fn=~s/([^\/])$/$1\//;
  'Store uploaded file as '.   $fn.=$env{'form.upfile.filename'};
  '<input type=text size=50 name=filename value="/priv/'.   $fn=~s/^\///;
   $uname.'/'.$fn.'"><br>'.   $fn=~s/(\/)+/\//g;
  '<input type=submit value="Store"></form>');  
   } else {  #    Fn is the full path to the destination filename.
       $r->print('<font color=red>Illegal filename.</font>');  #    
   }  
    &Debug($r, "Filename for upload: $fn");
    if (($fn) && ($fn!~/\/$/)) {
       $r->print('<form action="'.$action.'" method="post" name="fileupload">'.
         '<input type="hidden" name="phase" value="two" />'.
         '<input type="hidden" name="datatoken" value="'.
         &upfile_store.'" />'.
         '<input type="hidden" name="uploaduname" value="'.$uname.
         '" />'.&mt('Save uploaded file as ').
                         "<span class='LC_filename'>/priv/$uname/</span>".
                         '<input type="text" size="50" name="filename" value="'.$fn.
                         '" /><br />'.
         '<br />'.&mt('Choose file type:').'
   <select name="filetype">
    <option value="standard" selected>'.&mt('Regular file').'
    <option value="testbank">'.&mt('Testbank file').'
    <option value="imsimport">'.&mt('IMS package').'
   </select>'.&Apache::loncommon::help_open_topic("Uploading_File_Options").'
   <br />
   <br />
   ');
               $r->print('<input type="button" value="'.&mt('Save').'" onClick="javascript:verifyForm()"/></form>');
       # Check for bad extension and warn user
       if ($fn=~/\.(\w+)$/ && 
    (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
    $r->print('<span class="LC_error">'.&mt('The extension on this file,').
     ' "'.$1.'"'.&mt(', is reserved internally by LON-CAPA.').
     ' <br />'.&mt('Please change the extension.').'</span>');
       } elsif($fn=~/\.(\w+)$/ && 
       !defined(&Apache::loncommon::fileembstyle($1))) {
    $r->print('<span class="LC_error">'.&mt('The extension on this file,').
     ' "'.$1.'"'.&mt(', is not recognized by LON-CAPA.').
     ' <br />'.&mt('Please change the extension.').
     '</span>');
       }
    } else {
       $r->print('<span class="LC_error">'.&mt('Illegal filename.').'</span>');
    }
       } else {
    $r->print('<span class="LC_error">'.&mt('No upload file specified.').'</span>');
       }
 }  }
   
 sub phasetwo {  sub phasetwo {
    my ($r,$fn,$uname,$udom)=@_;      my ($r,$tfn,$uname,$udom,$mode)=@_;
    if ($fn=~/^\/priv\/$uname\//) {       my $output;
     my $tfn=$fn;      my $action = '/adm/upload';
     $tfn=~s/^\/(\~|priv)\/(\w+)//;      my $returnflag = '';
     my $target='/home/'.$uname.'/public_html'.$tfn;      if ($mode eq 'testbank') {
     my $datatoken=$ENV{'form.datatoken'};          $action = '/adm/testbank';
     if (($fn) && ($datatoken)) {      } elsif ($mode eq 'imsimport') {
  if ((-e $target) && ($ENV{'form.override'} ne 'Yes')) {          $action = '/adm/imsimport';
            $r->print(      }
  '<form action=/adm/upload method=post>'.      my $fn='/priv/'.$uname.'/'.$tfn;
  'File <tt>'.$fn.'</tt> exists. Overwrite? '.      $fn=~s/\/+/\//g;
  '<input type=hidden name=phase value=two>'.      &Debug($r, "Filename is ".$tfn);
  '<input type=hidden name=filename value="'.$fn.'">'.      if ($tfn) {
  '<input type=hidden name=datatoken value="'.$datatoken.'">'.   &Debug($r, "Filename for tfn = ".$tfn);
  '<input type=submit name=override value="Yes"></form>');   my $target='/home/'.$uname.'/public_html'.$tfn;
        } else {   &Debug($r, "target -> ".$target);
            my $source=$r->dir_config('lonDaemons').  #     target is the full filesystem path of the destination file.
                              '/tmp/'.$datatoken.'.tmp';   my $base = &File::Basename::basename($fn);
            if (copy($source,$target)) {   my $path = &File::Basename::dirname($fn);
       $r->print('File copied.');   $base    = &HTML::Entities::encode($base,'<>&"');
               $r->print('<p><font size=+2><a href="'.$fn.   my $url  = $path."/".$base; 
                         '">View file</a></font>');   &Debug($r, "URL is now ".$url);
    } else {   my $datatoken=$env{'form.datatoken'};
               $r->print('Failed to copy: '.$!);   if (($fn) && ($datatoken)) {
    }              if ($env{'form.cancel'}) {
        }                  my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
                   my $dirpath=$path.'/';
                   $dirpath=~s/\/+/\//g;
                   $output .= &mt('Upload cancelled.').'<br /><font size="+2"><a href="'.$dirpath.'">'.
                             &mt('Back to Directory').'</a></font>';
       } elsif ((-e $target) && (!$env{'form.override'})) {
    $output .= '<form action="'.$action.'" method="post">'.
     &mt('File [_1] exists. Overwrite?','<span class="LC_filename">'.$fn.'</span>').
     '<input type="hidden" name="phase" value="two" />'.
     '<input type="hidden" name="filename" value="'.$url.'" />'.
     '<input type="hidden" name="datatoken" value="'.$datatoken.'" />'.
     '<input type="submit" name="override" value="'.&mt('Yes').'" />'.
                             '<input type="submit" name="cancel" value="'.&mt('Cancel').'" />'.
                             '</form>';
               } else {
    my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
    my $dirpath=$path.'/';
    $dirpath=~s/\/+/\//g;
    # Check for bad extension and disallow upload
                   my $result;
                   ($result,$returnflag) = &check_extension($fn,$mode,$source,$target,$action,$dirpath,$url);
                   $output .= $result;
       }
    } else {
       $output .= '<span class="LC_error">'.
         &mt('Please use browser "Back" button and pick a filename').
         '</span><br />';
    }
     } else {      } else {
        $r->print(   $output .= '<span class="LC_error">'.
    '<font size=+1 color=red>Please pick a filename</font><p>');     &mt('Please use browser "Back" button and pick a filename').
        &phaseone($r,$fn,$uname,$udom);     '</span><br />';
     }      }
   } else {      return ($output,$returnflag);
     $r->print(  
    '<font size=+1 color=red>Please pick a filename</font><p>');  
     &phaseone($r,$fn,$uname,$udom);  
   }  
 }  }
   
   sub check_extension {
       my ($fn,$mode,$source,$target,$action,$dirpath,$url) = @_;
       my ($result,$returnflag);
       # Check for bad extension and disallow upload
       if ($fn=~/\.(\w+)$/ &&
           (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
           $result .= &mt('File [_1] could not be copied.',
                         '<span class="LC_filename">'.$fn.'</span> ').
                     '<br /><span class="LC_error">'.
                     &mt('The extension on this file is reserved internally by LON-CAPA.').
                     '</span>';
       } elsif ($fn=~/\.(\w+)$/ &&
                !defined(&Apache::loncommon::fileembstyle($1))) {
           $result .= &mt('File [_1] could not be copied.',
                         '<span class="LC_filename">'.$fn.'</span> ').
                     '<br /><span class="LC_error">'.
                     &mt('The extension on this file is not recognized by LON-CAPA.').
                     '</span>';
       } elsif (-d $target) {
           $result .= &mt('File [_1] could not be copied.',
                         '<span class="LC_filename">'.$fn.'</span>').
                     '<br /><span class="LC_error">'.
                     &mt('The target is an existing directory.').
                     '</span>';
       } elsif (copy($source,$target)) {
           chmod(0660, $target); # Set permissions to rw-rw---.
           if ($mode eq 'testbank' || $mode eq 'imsimport') {
               $returnflag = 'ok';
               $result .= &mt('Your file - [_1] - was uploaded successfully',$fn).'<br /><br />';
           } else {
               $result .= &mt('File copied.').'<br />';
           }
           # Check for embedded objects.
           my (%allfiles,%codebase);
           my ($text,$header,$css,$js);
           if (($mode ne 'imsimport') && ($target =~ /\.(htm|html|shtml)$/i)) {
               my (%allfiles,%codebase);
               &Apache::lonnet::extract_embedded_items($target,\%allfiles,\%codebase);
               if (keys(%allfiles) > 0) {
                   my $state = <<STATE;
       <input type="hidden" name="action"      value="upload_embedded" />
       <input type="hidden" name="currentpath" value="$env{'form.currentpath'}" />
       <input type="hidden" name="mode"        value="$mode" />
       <input type="hidden" name="phase"       value="three" />
       <input type="hidden" name="filename" value="$url" />
   STATE
                   $result .= "<h3>".&mt("Reference Warning")."</h3>".
                              "<p>".&mt("Completed upload of the file. This file contained references to other files.")."</p>".
                             "<p>".&mt("Please select the locations from which the referenced files are to be uploaded.")."</p>".
                             &Apache::loncommon::ask_for_embedded_content($action,$state,\%allfiles,\%codebase,
                                         {'error_on_invalid_names'   => 1,
                                          'ignore_remote_references' => 1,});
                   if ($mode eq 'testbank') {
                       $returnflag = 'embedded';
                       $result .=  '<p>'.&mt('Or [_1]continue[_2] the testbank import without these files','<a href="javascript:document.testbankForm.submit();">','</a>').'</p>';
                   }
               }
           }
           if (($mode ne 'imsimport') && ($mode ne 'testbank')) {
               $result .= '<br /><font size="+2"><a href="'.$url.'">'.
                           &mt('View file').'</a></font>';
           }
       } else {
           $result .= &mt('Failed to copy: [_1].',$!);
       }
       if ($mode ne 'imsimport' && $mode ne 'testbank') {
           $result .= '<br /><font size="+2"><a href="'.$dirpath.'">'.
                      &mt('Back to Directory').'</a></font><br />';
       }
       return ($result,$returnflag);
   }
   
   sub phasethree {
       my ($r,$fn,$uname,$udom,$mode) = @_;
       my $result;
       my $dir_root = '/home/'.$uname.'/public_html';
       my $url_root = '/priv/'.$uname;
       my $base = &File::Basename::basename($fn);
       my $path = &File::Basename::dirname($fn);
       $result = &Apache::loncommon::upload_embedded($mode,$path,$uname,$udom,
                                                     $dir_root,$url_root);
       if ($mode ne 'imsimport' && $mode ne 'testbank') {
           $result = '<br /><font size="+2"><a href="'.$url_root.$fn.'">'.
                     &mt('View main file').'</a></font>'.
                     '<br /><font size="+2"><a href="'.$url_root.$path.'">'.
                     &mt('Back to Directory').'</a></font><br />';
       }
       return $result;
   }
   
   # ---------------------------------------------------------------- Main Handler
 sub handler {  sub handler {
   
   my $r=shift;      my $r=shift;
   
   my $uname;      my $uname;
   my $udom;      my $udom;
       my $javascript = '';
   #
   # phase two: re-attach user
   #
       if ($env{'form.uploaduname'}) {
    $env{'form.filename'}='/priv/'.$env{'form.uploaduname'}.'/'.
       $env{'form.filename'};
       }
   
   unless (($uname,$udom)=      unless ($env{'form.phase'} eq 'two') {
     &Apache::loncacc::constructaccess(          $javascript = qq|
              $ENV{'form.filename'},$r->dir_config('lonDefDomain'))) {  function verifyForm() {
      $r->log_reason($uname.' at '.$udom.      var mode = document.fileupload.filetype.options[document.fileupload.filetype.selectedIndex].value
          ' trying to publish file '.$ENV{'form.filename'}.      if (mode == "testbank") {
          ' - not authorized',           document.fileupload.action = "/adm/testbank";
          $r->filename);       }
      return HTTP_NOT_ACCEPTABLE;      if (mode == "imsimport") {
   }          document.fileupload.action = "/adm/imsimport";
       }
   my $fn;      if (mode == "standard") {
           document.fileupload.action = "/adm/upload";
   if ($ENV{'form.filename'}) {      }
       $fn=$ENV{'form.filename'};      document.fileupload.submit();
       $fn=~s/^http\:\/\/[^\/]+\/(\~|priv\/)(\w+)//;  }
   } else {   |;
      $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.      }
          ' unspecified filename for upload', $r->filename);       ($uname,$udom)=
      return HTTP_NOT_FOUND;   &Apache::loncacc::constructaccess($env{'form.filename'},
   }    $r->dir_config('lonDefDomain'));
   
       unless (($uname) && ($udom)) {
    $r->log_reason($uname.' at '.$udom.
          ' trying to publish file '.$env{'form.filename'}.
          ' - not authorized', 
          $r->filename); 
    return HTTP_NOT_ACCEPTABLE;
       }
       
       my $fn;
       if ($env{'form.filename'}) {
    $fn=$env{'form.filename'};
    $fn=~s/^http\:\/\/[^\/]+\///;
    $fn=~s/^\///;
    $fn=~s{(~|priv/)($LONCAPA::username_re)}{};
    $fn=~s/\/+/\//g;
       } else {
    $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
          ' unspecified filename for upload', $r->filename); 
    return HTTP_NOT_FOUND;
       }
   
 # ----------------------------------------------------------- Start page output  # ----------------------------------------------------------- Start page output
   
   
   $r->content_type('text/html');      &Apache::loncommon::content_type($r,'text/html');
   $r->send_http_header;      $r->send_http_header;
   
   $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');     $javascript = "<script type=\"text/javascript\">\n//<!--\n".
    $javascript."\n// --></script>\n";
   
   $r->print(      $r->print(&Apache::loncommon::start_page('Upload file to Construction Space',
    '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');       $javascript));
   
     
   $r->print('<h1>Upload file to Construction Space</h1>');  
       
   if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {      if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
           $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.   $r->print('<h3><span class="LC_error">'.&mt('Co-Author').': '.$uname.
                '</font></h3>');    &mt(' at ').$udom.'</span></h3>');
   }      }
   
   
   if ($ENV{'form.phase'} eq 'two') {      if ($env{'form.phase'} eq 'three') {
       &phasetwo($r,$fn,$uname,$udom);          my $output = &phasethree($r,$fn,$uname,$udom,'author');
   } else {          $r->print($output);
       &phaseone($r,$fn,$uname,$udom);      } elsif ($env{'form.phase'} eq 'two') {
   }   my ($output,$returnflag) = &phasetwo($r,$fn,$uname,$udom);
           $r->print($output);
       } else {
    &phaseone($r,$fn,$uname,$udom);
       }
   
   $r->print('</body></html>');      $r->print(&Apache::loncommon::end_page());
   return OK;        return OK;  
 }  }
   
   1;
   __END__
   
   
Removed from v.1.4  
changed lines
  Added in v.1.40

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