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Annotation of loncom/homework/daxesave.pm, revision 1.6

1.1       damieng     1: # The LearningOnline Network
                      2: # Convert and save a problem from Daxe.
                      3: #
1.6     ! raeburn     4: # $Id: daxesave.pm,v 1.5 2016/12/13 21:37:35 damieng Exp $
1.1       damieng     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;
1.6     ! raeburn    31: use strict;
1.1       damieng    32: 
1.6     ! raeburn    33: use Apache::Constants qw(:common);
1.1       damieng    34: use Apache::lonnet;
                     35: use Try::Tiny;
                     36: use File::Copy;
                     37: 
                     38: use Apache::lonacc;
                     39: use Apache::loncommon;
                     40: use Apache::xml_to_loncapa;
                     41: 
                     42: sub handler {
                     43:     my $request = shift;
                     44:     
1.2       damieng    45:     $request->content_type('text/plain');
                     46:     
1.3       damieng    47:     # path should be in the form "/daxeopen/priv/..."
1.4       damieng    48:     # or ^/daxeopen/uploaded/[^/]+/[^/]+/.*html?$
1.3       damieng    49:     my $path = $env{'form.path'};
1.1       damieng    50:     $path =~ s/^\/daxeopen//;
                     51:     
1.3       damieng    52:     my $allowed = 0;
                     53:     if ($path =~ /^\/priv/) {
                     54:         my ($ownername,$ownerdom,$ownerhome) = 
                     55:             &Apache::lonnet::constructaccess($path, 'setpriv');
                     56:         if (($ownername ne '') && ($ownerdom ne '') && ($ownerhome ne '')) {
                     57:             unless ($ownerhome eq 'no_host') {
                     58:                 my @hosts = &Apache::lonnet::current_machine_ids();
                     59:                 if (grep(/^\Q$ownerhome\E$/,@hosts)) {
                     60:                     $allowed = 1;
                     61:                 }
                     62:             }
                     63:         }
1.4       damieng    64:     } elsif ($path =~ m|^/uploaded/[^/]+/[^/]+/|) {
1.3       damieng    65:         if ($env{'user.name'} ne '' && $env{'user.domain'} ne '' && $env{'request.course.id'}) {
                     66:             $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
                     67:             $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1.4       damieng    68:             if ($path =~ m|^/uploaded/\Q$cdom\E/\Q$cnum\E/| && $path !~ /\.\./) {
1.3       damieng    69:                 if (&Apache::lonnet::allowed('mdc', $env{'request.course.id'})) {
                     70:                     $allowed = 1;
                     71:                 }
1.1       damieng    72:             }
                     73:         }
                     74:     }
                     75:     unless ($allowed) {
1.2       damieng    76:         $request->log_reason("Unauthorized path: $path", $path);
                     77:         $request->print("error\nUnauthorized path: $path");
                     78:         $request->status(403);
                     79:         return OK;
1.1       damieng    80:     }
                     81: 
                     82:     my $newpath = &Apache::lonnet::filelocation('', $path);
                     83: 
                     84:     my $contents = $env{'form.file'};
                     85:     
1.5       damieng    86:     my $mode;
                     87:     if ($path =~ /\.(task|problem|exam|quiz|assess|survey|library|xml|html|htm|xhtml|xhtm)$/) {
                     88:         try {
                     89:             $contents = &Apache::xml_to_loncapa::convert_file($contents);
                     90:         } catch {
                     91:             $request->print("error\nconvert failed for $path: $_");
                     92:             return OK;
                     93:         };
                     94:         $mode = '>:encoding(UTF-8)';
                     95:     } else {
                     96:         $mode = '>';
                     97:     }
1.1       damieng    98:     
                     99:     my $filebak = $newpath.".bak";
                    100:     if (-e $newpath) {
                    101:         copy($newpath, $filebak); # errors ignored
                    102:     }
1.6     ! raeburn   103:     if (open(my $out, $mode, $newpath)) {
        !           104:         print $out $contents;
        !           105:         close $out;
        !           106:         $request->print("ok\n");
        !           107:     } else {
        !           108:         $request->print("error\nFailed to open file to save $path");
        !           109:     }
1.1       damieng   110:     return OK;
                    111: }
                    112: 
                    113: 1;
                    114: __END__