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only try to convert XML files when saving

    1: # The LearningOnline Network
    2: # Convert and save a problem from Daxe.
    3: #
    4: # $Id: daxesave.pm,v 1.5 2016/12/13 21:37:35 damieng 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: 
   30: package Apache::daxesave;
   31: 
   32: use Apache::Constants;
   33: use Apache::lonnet;
   34: use Try::Tiny;
   35: use File::Copy;
   36: 
   37: use Apache::lonacc;
   38: use Apache::loncommon;
   39: use Apache::xml_to_loncapa;
   40: 
   41: sub handler {
   42:     my $request = shift;
   43:     
   44:     $request->content_type('text/plain');
   45:     
   46:     # path should be in the form "/daxeopen/priv/..."
   47:     # or ^/daxeopen/uploaded/[^/]+/[^/]+/.*html?$
   48:     my $path = $env{'form.path'};
   49:     $path =~ s/^\/daxeopen//;
   50:     
   51:     my $allowed = 0;
   52:     if ($path =~ /^\/priv/) {
   53:         my ($ownername,$ownerdom,$ownerhome) = 
   54:             &Apache::lonnet::constructaccess($path, 'setpriv');
   55:         if (($ownername ne '') && ($ownerdom ne '') && ($ownerhome ne '')) {
   56:             unless ($ownerhome eq 'no_host') {
   57:                 my @hosts = &Apache::lonnet::current_machine_ids();
   58:                 if (grep(/^\Q$ownerhome\E$/,@hosts)) {
   59:                     $allowed = 1;
   60:                 }
   61:             }
   62:         }
   63:     } elsif ($path =~ m|^/uploaded/[^/]+/[^/]+/|) {
   64:         if ($env{'user.name'} ne '' && $env{'user.domain'} ne '' && $env{'request.course.id'}) {
   65:             $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
   66:             $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
   67:             if ($path =~ m|^/uploaded/\Q$cdom\E/\Q$cnum\E/| && $path !~ /\.\./) {
   68:                 if (&Apache::lonnet::allowed('mdc', $env{'request.course.id'})) {
   69:                     $allowed = 1;
   70:                 }
   71:             }
   72:         }
   73:     }
   74:     unless ($allowed) {
   75:         $request->log_reason("Unauthorized path: $path", $path);
   76:         $request->print("error\nUnauthorized path: $path");
   77:         $request->status(403);
   78:         return OK;
   79:     }
   80: 
   81:     my $newpath = &Apache::lonnet::filelocation('', $path);
   82: 
   83:     my $contents = $env{'form.file'};
   84:     
   85:     my $mode;
   86:     if ($path =~ /\.(task|problem|exam|quiz|assess|survey|library|xml|html|htm|xhtml|xhtm)$/) {
   87:         try {
   88:             $contents = &Apache::xml_to_loncapa::convert_file($contents);
   89:         } catch {
   90:             $request->print("error\nconvert failed for $path: $_");
   91:             return OK;
   92:         };
   93:         $mode = '>:encoding(UTF-8)';
   94:     } else {
   95:         $mode = '>';
   96:     }
   97:     
   98:     my $filebak = $newpath.".bak";
   99:     if (-e $newpath) {
  100:         copy($newpath, $filebak); # errors ignored
  101:     }
  102:     open my $out, $mode, $newpath;
  103:     print $out $contents;
  104:     close $out;
  105:     
  106:     $request->print("ok\n");
  107:     return OK;
  108: }
  109: 
  110: 1;
  111: __END__