--- loncom/publisher/lonupload.pm	2001/06/24 18:40:58	1.6
+++ loncom/publisher/lonupload.pm	2001/12/17 00:57:59	1.10
@@ -1,21 +1,51 @@
 # The LearningOnline Network with CAPA
 # Handler to upload files into construction space
 #
+# $Id: lonupload.pm,v 1.10 2001/12/17 00:57:59 harris41 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
 # 
 # (TeX Content Handler
 #
+# YEAR=2000
 # 05/29/00,05/30,10/11 Gerd Kortemeyer)
 #
 # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
+# YEAR=2001
 # 03/23 Guy Albertelli
 # 03/24,03/29 Gerd Kortemeyer)
 #
 # 03/31,04/03 Gerd Kortemeyer)
 #
-# 04/05,04/09,05/25,06/23,06/24 Gerd Kortemeyer
+# 04/05,04/09,05/25,06/23,06/24,08/22 Gerd Kortemeyer
+# 11/29 Matthew Hall
+# 12/16 Scott Harrison
+#
+###
 
 package Apache::lonupload;
 
@@ -24,6 +54,7 @@ use Apache::File;
 use File::Copy;
 use Apache::Constants qw(:common :http :methods);
 use Apache::loncacc;
+use Apache::loncommon();
 
 sub upfile_store {
     my $r=shift;
@@ -54,6 +85,7 @@ 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 +95,24 @@ sub phaseone {
  '<input type=text size=50 name=filename value="/priv/'.
   $uname.'/'.$fn.'"><br>'.
  '<input type=submit value="Store"></form>');
+      # Check for bad extension and warn user
+      if ($fn=~/\.(\w+)$/ && 
+	  (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
+	  $r->print(
+ '<font color=red>'.
+ 'The extension on this file, "'.$1.
+ '", is reserved internally by LON-CAPA. <br \>'.
+ 'Please change the extension.'.
+ '</font>');
+      } elsif($fn=~/\.(\w+)$/ && 
+	      !defined(&Apache::loncommon::fileembstyle($1))) {
+	  $r->print(
+ '<font color=red>'.
+ 'The extension on this file, "'.$1.
+ '", is not recognized by LON-CAPA. <br \>'.
+ 'Please change the extension.'.
+ '</font>');
+      }
   } else {
       $r->print('<font color=red>Illegal filename.</font>');
   }
@@ -90,7 +140,22 @@ sub phasetwo {
        } else {
            my $source=$r->dir_config('lonDaemons').
 	                             '/tmp/'.$datatoken.'.tmp';
-           if (copy($source,$target)) {
+           # Check for bad extension and disallow upload
+	   if ($fn=~/\.(\w+)$/ && 
+	       (&Apache::loncommon::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 ($fn=~/\.(\w+)$/ && 
+		    !defined(&Apache::loncommon::fileembstyle($1))) {
+	       $r->print(
+ 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
+ '<font color=red>'.
+ 'The extension on this file is not recognized 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>');
@@ -110,6 +175,7 @@ sub phasetwo {
   }
 }
 
+# ---------------------------------------------------------------- Main Handler
 sub handler {
 
   my $r=shift;
@@ -168,3 +234,79 @@ sub handler {
   $r->print('</body></html>');
   return OK;  
 }
+
+1;
+__END__
+
+=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)
+
+=item *
+
+(phase one is to specify upload file; phase two is to handle conditions
+subsequent to specification--like overwriting an existing file)
+
+=back
+
+=head1 OTHER SUBROUTINES
+
+=over 4
+
+=item *
+
+phaseone() : Interface for specifying file to upload.
+
+=item *
+
+phasetwo() : Interface for handling post-conditions about uploading (such
+as overwriting an existing file).
+
+=item *
+
+upfile_store() : Store contents of uploaded file into temporary space.  Invoked
+by phaseone subroutine.
+
+=back
+
+=cut