1 # Poor Man's CGI Module for Perl
3 # (c) 2002 Martin Mares <mj@ucw.cz>
4 # Slightly modified by Tomas Valla <tom@ucw.cz>
6 # This software may be freely distributed and used according to the terms
7 # of the GNU Lesser General Public License.
15 # The somewhat hairy Perl export mechanism
17 our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
20 @EXPORT = qw(&html_escape &url_escape &self_ref &self_form);
27 $x =~ s/([^-\$_.!*'(),0-9A-Za-z\x80-\xff])/"%".unpack('H2',$1)/ge;
42 sub parse_arg_string($) {
45 foreach $_ (split /[&:]/,$s) {
46 (/^([^=]+)=(.*)$/) or next;
47 my $arg = $arg_table->{$1} or next;
50 s/%(..)/pack("c",hex $1)/eg;
54 if (my $rx = $arg->{'check'}) {
55 if (!/^$rx$/) { $_ = $arg->{'default'}; }
58 my $r = ref($arg->{'var'});
60 ${$arg->{'var'}} = $_;
61 } elsif ($r eq 'ARRAY') {
62 push @{$arg->{'var'}}, $_;
68 $arg_table = shift @_;
69 foreach my $a (values %$arg_table) {
70 my $r = ref($a->{'var'});
71 defined($a->{'default'}) or $a->{'default'}="";
73 ${$a->{'var'}} = $a->{'default'};
74 } elsif ($r eq 'ARRAY') {
78 defined $ENV{"GATEWAY_INTERFACE"} or die "Not called as a CGI script";
79 my $method = $ENV{"REQUEST_METHOD"};
80 if ($method eq "GET") {
81 parse_arg_string($ENV{"QUERY_STRING"});
82 } elsif ($method eq "POST") {
83 if ($ENV{"CONTENT_TYPE"} =~ /^application\/x-www-form-urlencoded\b/i) {
89 return "Unknown content type for POST data";
92 return "Unknown request method";
96 sub make_out_args($) {
99 foreach my $name (keys %$arg_table) {
100 my $arg = $arg_table->{$name};
101 defined $arg->{'pass'} && !$arg->{'pass'} && !exists $overrides->{$name} && next;
103 if (!defined($value = $overrides->{$name})) {
104 if (exists $overrides->{$name}) {
105 $value = $arg->{'default'};
107 $value = ${$arg->{'var'}};
110 if ($value ne $arg->{'default'}) {
111 $out->{$name} = $value;
119 my $out = make_out_args(\%h);
120 return "?" . join(':', map { "$_=" . url_escape($out->{$_}) } sort keys %$out);
125 my $out = make_out_args(\%h);
126 return join('', map { "<input type=hidden name=$_ value='" . html_escape($out->{$_}) . "'>\n" } sort keys %$out);