--- loncom/publisher/lonupload.pm	2001/08/22 18:13:20	1.7
+++ loncom/publisher/lonupload.pm	2001/11/29 21:51:40	1.8
@@ -1,6 +1,30 @@
 # The LearningOnline Network with CAPA
 # Handler to upload files into construction space
 #
+# $Id: lonupload.pm,v 1.8 2001/11/29 21:51:40 matthew Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# 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
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# 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.
+#
+# 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/
+#
 # (Handler to retrieve an old version of a file
 #
 # (Publication Handler
@@ -16,6 +40,7 @@
 # 03/31,04/03 Gerd Kortemeyer)
 #
 # 04/05,04/09,05/25,06/23,06/24,08/22 Gerd Kortemeyer
+# 11/29 Matthew Hall
 
 package Apache::lonupload;
 
@@ -24,6 +49,7 @@ use Apache::File;
 use File::Copy;
 use Apache::Constants qw(:common :http :methods);
 use Apache::loncacc;
+use Apache::lonnet;
 
 sub upfile_store {
     my $r=shift;
@@ -54,6 +80,7 @@ sub phaseone {
     $fn.=$ENV{'form.upfile.filename'};
     $fn=~s/^\///;
     $fn=~s/(\/)+/\//g;
+
     if (($fn) && ($fn!~/\/$/)) {
       $r->print(
  '<form action=/adm/upload method=post>'.
@@ -63,6 +90,16 @@ sub phaseone {
  '<input type=text size=50 name=filename value="/priv/'.
   $uname.'/'.$fn.'"><br>'.
  '<input type=submit value="Store"></form>');
+      # Check for bad extension
+      if ($fn=~/\.(\w+)$/ && 
+	  (&Apache::lonnet::fileembstyle($1) eq 'hdn')) {
+	  $r->print(
+ '<font color=red>'.
+ 'The extension on this file, "'.$1.
+ '", is reserved internally by LON-CAPA. <br \>'.
+ 'Please change the extension.'.
+ '</font>');
+      }  
   } else {
       $r->print('<font color=red>Illegal filename.</font>');
   }
@@ -90,7 +127,15 @@ sub phasetwo {
        } else {
            my $source=$r->dir_config('lonDaemons').
 	                             '/tmp/'.$datatoken.'.tmp';
-           if (copy($source,$target)) {
+           # Check for bad extension
+	   if ($fn=~/\.(\w+)$/ && 
+	       (&Apache::lonnet::fileembstyle($1) eq 'hdn')) {
+	       $r->print(
+ 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
+ '<font color=red>'.
+ 'The extension on this file is reserved internally by LON-CAPA.'.
+ '</font>');
+	   } elsif (copy($source,$target)) {
 	      $r->print('File copied.');
               $r->print('<p><font size=+2><a href="'.$fn.
                         '">View file</a></font>');