[LON-CAPA-cvs] cvs: loncom /lonnet/perl lonnet.pm

[www]

www		Fri Jan 10 09:50:08 2003 EDT

  Modified files:              
    /loncom/lonnet/perl	lonnet.pm 
  Log:
  Had to implement filename filters for uploaded files (photos, etc). 
  Several users in the workshop had really strange filenames, and LON-CAPA 
  would choke on those, leaving the user rather puzzled.
  
  
Index: loncom/lonnet/perl/lonnet.pm
diff -u loncom/lonnet/perl/lonnet.pm:1.314 loncom/lonnet/perl/lonnet.pm:1.315
--- loncom/lonnet/perl/lonnet.pm:1.314	Thu Jan  9 17:45:51 2003
+++ loncom/lonnet/perl/lonnet.pm	Fri Jan 10 09:50:08 2003
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.314 2003/01/09 22:45:51 www Exp $
+# $Id: lonnet.pm,v 1.315 2003/01/10 14:50:08 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -857,8 +857,15 @@
 sub userfileupload {
     my ($formname,$coursedoc)=@_;
     my $fname=$ENV{'form.'.$formname.'.filename'};
+# Replace Windows backslashes by forward slashes
     $fname=~s/\\/\//g;
+# Get rid of everything but the actual filename
     $fname=~s/^.*\/([^\/]+)$/$1/;
+# Replace spaces by underscores
+    $fname=~s/\s+/\_/g;
+# Replace all other weird characters by nothing
+    $fname=~s/[^\w\.]//g;
+# See if there is anything left
     unless ($fname) { return 'error: no uploaded file'; }
     chop($ENV{'form.'.$formname});
 # Create the directory if not present