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Annotation of loncom/cgi/thumbnail.gif, revision 1.1

1.1     ! www         1: #!/usr/bin/perl
        !             2: 
        !             3: # The LearningOnline Network with CAPA
        !             4: # thumbnail.gif - a CGI script that ships out the thumbnail
        !             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: # Scott Harrison
        !            29: # YEAR=2001
        !            30: # 8/15,9/28,12/11
        !            31: #
        !            32: ###
        !            33: 
        !            34: # Example usage: /cgi-bin/thumbnail.gif?url=...
        !            35: 
        !            36: use strict;
        !            37: 
        !            38: $|=1;   # Autoflush after each print/write
        !            39: foreach (split(/&/,$ENV{'QUERY_STRING'})) {
        !            40:     my ($name, $value) = split(/=/,$_);
        !            41:     $value =~ tr/+/ /;
        !            42:     $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
        !            43:     if ($name eq 'url') {
        !            44: 	$ENV{'form.'.$name}=$value;
        !            45:     }
        !            46: }
        !            47: 
        !            48: # Tell the server we are sending a gif graphic
        !            49: print <<END;
        !            50: Content-type: image/gif
        !            51: 
        !            52: END
        !            53: 
        !            54: my $fn='/home/httpd/html/res/adm/pages/nothumb.gif';
        !            55: open (IN,$fn);
        !            56: binmode(STDOUT);
        !            57: print join('',<IN>); # output image
        !            58: $|=1; # be sure to flush before closing
        !            59: close IN;
        !            60: 
        !            61: 
        !            62: 
        !            63: 
        !            64: 
        !            65: