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Postings from January 2002
On Thursday 31 January 2002 11:45 am, you wrote:
> > >> If you want to loop over all the form fields, you'd do:
> > >>
> > >> for $field (param()) {
> > >> print "$field => ", param($field), "<br>\n";
> > >> }
> > >
> > >How can the param's be placed into a new hash?
> >
> > CGI.pm has a Vars() method, I believe, which returns a hash.
> >
> > use CGI;
> > my $q = CGI->new;
> > $data = $q->Vars;
> >
> > print $data->{field}; # etc.
> >
> > But note that this can cause annoyances when you have multiple fields of
> > the same name (like checkboxes). The values will be \0-separated.
>
> Fields are all unique. I read the Vars section of 'perldoc CGI', but
> didn't figure out how to use it. Wound up with below, maybe some sort of
> better way, not sure. Reasons for wanting to do this:
>
> 1. Rumored CGI has solid security.
> 2. Looks a lot cleaner.
> 3. Script contains $data{'something'} = "foo"; # redefinitions I don't
> think can be done with param('something') = "foo"; (primary reason).
>
> The problem with this is that it is slower than the old routine due to the
> 'for' loop.
>
> sub get_data {
>
> $t0 = new Benchmark;
>
> # local($string);
> # if ($ENV{'REQUEST_METHOD'} eq 'GET') {
> # $_ = $string = $ENV{'QUERY_STRING'};
> # tr/\"~;/_/;
> # $string = $_;
> # } else {
> # read(STDIN, $string, $ENV{'CONTENT_LENGTH'});
> # $_ = $string;
> # $OK_CHARS='a-zA-Z0-9=&%\n\/_\-\.@';
> # tr/\"~;/_/;
> # $string = $_;
> # }
> # @data = split(/&/, $string);
> # foreach (@data)
> # {
> # split(/=/, $_);
> # $_[0] =~ s/\+/ /g;
> # $_[0] =~ s/%(..)/pack("c", hex($1))/ge;
> # $data{"$_[0]"} = $_[1];
> # }
> # foreach (keys %data)
> # {
> # $data{"$_"} =~ s/\+/ /g;
> # $data{"$_"} =~ s/%(..)/pack("c", hex($1))/ge;
> # }
>
> use CGI 'param'; # These lines replace those above.
> for (param()) {
> $data{$_} = param($_);
> }
>
> $t1 = new Benchmark;
> $td = timediff($t1, $t0);
> print "Code took: ", timestr($td), "\n\n";
>
> %data;
>
> # Benchmark results:
> # Old routine: Code took: 0 wallclock secs ( 0.01 usr + 0.00 sys = 0.01
> CPU) # CGI: Code took: 0 wallclock secs ( 0.08 usr + 0.00 sys =
> 0.08 CPU) }
>
> /g
--
Jan Gruber Primacom AG
Central Systems
Office: +49 (341) 609 524 53
Fax: +49 (341) 609 525 17
cat /dev/world | perl -e "while (<>) {(/(^.*? \?) 42 \!/) && (print $1)}"
errors->(c)
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