1 # Poor Man's CGI Module for Perl
3 # (c) 2002 Martin Mares <mj@ucw.cz>
5 # This software may be freely distributed and used according to the terms
6 # of the GNU Lesser General Public License.
14 # The somewhat hairy Perl export mechanism
16 our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
19 @EXPORT = qw(&html_escape &url_escape &self_ref &self_form);
26 $x =~ s/([^-\$_.!*'(),0-9A-Za-z\x80-\xff])/"%".unpack('H2',$1)/ge;
41 our $value_separator = "&";
43 sub parse_arg_string($) {
46 foreach $_ (split /[&:]/,$s) {
47 (/^([^=]+)=(.*)$/) or next;
48 my $arg = $arg_table->{$1} or next;
51 s/%(..)/pack("c",hex $1)/eg;
55 if (my $rx = $arg->{'check'}) {
56 if (!/^$rx$/) { $_ = $arg->{'default'}; }
58 if (${$arg->{'var'}} eq $arg->{'default'}) {
59 ${$arg->{'var'}} = $_;
61 ${$arg->{'var'}} .= $value_separator.$_;
67 $arg_table = shift @_;
68 foreach my $a (values %$arg_table) {
69 defined($a->{'default'}) or $a->{'default'}="";
70 ${$a->{'var'}} = $a->{'default'};
72 defined $ENV{"GATEWAY_INTERFACE"} or die "Not called as a CGI script";
73 my $method = $ENV{"REQUEST_METHOD"};
74 if ($method eq "GET") {
75 parse_arg_string($ENV{"QUERY_STRING"});
76 } elsif ($method eq "POST") {
77 if ($ENV{"CONTENT_TYPE"} =~ /^application\/x-www-form-urlencoded\b/i) {
83 return "Unknown content type for POST data";
86 return "Unknown request method";
90 sub make_out_args($) {
93 foreach my $name (keys %$arg_table) {
94 my $arg = $arg_table->{$name};
95 defined $arg->{'pass'} && !$arg->{'pass'} && !exists $overrides->{$name} && next;
97 if (!defined($value = $overrides->{$name})) {
98 if (exists $overrides->{$name}) {
99 $value = $arg->{'default'};
101 $value = ${$arg->{'var'}};
104 if ($value ne $arg->{'default'}) {
105 $out->{$name} = $value;
113 my $out = make_out_args(\%h);
114 return "?" . join(':', map { "$_=" . url_escape($out->{$_}) } sort keys %$out);
119 my $out = make_out_args(\%h);
120 return join('', map { "<input type=hidden name=$_ value='" . html_escape($out->{$_}) . "'>\n" } sort keys %$out);