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#!/usr/local/bin/perl
$DIFF = "/usr/bin/diff";
$PERL = "/usr/bin/perl";
use CGI qw(:standard);
use CGI::Carp;
print header;
print start_html("File Diff Example");
print "<strong>Version </strong>$CGI::VERSION<p>";
print <<EOF;
<H1>File Diff Example</H1>
Enter two files. When you press "submit" their diff will be
produced.
EOF
;
# Start a multipart form.
print start_multipart_form;
print "File #1:",filefield(-name=>'file1',-size=>45),"<BR>\n";
print "File #2:",filefield(-name=>'file2',-size=>45),"<BR>\n";
print "Diff type: ",radio_group(-name=>'type',
-value=>['context','normal']),"<br>\n";
print reset,submit(-name=>'submit',-value=>'Do Diff');
print endform;
# Process the form if there is a file name entered
$file1 = param('file1');
$file2 = param('file2');
$|=1; # for buffering
if ($file1 && $file2) {
$realfile1 = tmpFileName($file1);
$realfile2 = tmpFileName($file2);
print "<HR>\n";
print "<H2>$file1 vs $file2</H2>\n";
print "<PRE>\n";
$options = "-c" if param('type') eq 'context';
system "$DIFF $options $realfile1 $realfile2 | $PERL -pe 's/>/>/g; s/</</g;'";
close $file1;
close $file2;
print "</PRE>\n";
}
print <<EOF;
<HR>
<A HREF="../cgi_docs.html">CGI documentation</A>
<HR>
<ADDRESS>
<A HREF="/~lstein">Lincoln D. Stein</A>
</ADDRESS><BR>
Last modified 17 July 1996
EOF
;
print end_html;
sub sanitize {
my $name = shift;
my($safe) = $name=~/([a-zA-Z0-9._~#,]+)/;
unless ($safe) {
print "<strong>$name is not a valid Unix filename -- sorry</strong>";
exit 0;
}
return $safe;
}
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