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- package CGI::Util;
-
- use strict;
- use vars qw($VERSION @EXPORT_OK @ISA $EBCDIC @A2E @E2A);
- require Exporter;
- @ISA = qw(Exporter);
- @EXPORT_OK = qw(rearrange make_attributes unescape escape expires);
-
- $VERSION = '1.3';
-
- $EBCDIC = "\t" ne "\011";
- if ($EBCDIC) {
- # (ord('^') == 95) for codepage 1047 as on os390, vmesa
- @A2E = (
- 0, 1, 2, 3, 55, 45, 46, 47, 22, 5, 21, 11, 12, 13, 14, 15,
- 16, 17, 18, 19, 60, 61, 50, 38, 24, 25, 63, 39, 28, 29, 30, 31,
- 64, 90,127,123, 91,108, 80,125, 77, 93, 92, 78,107, 96, 75, 97,
- 240,241,242,243,244,245,246,247,248,249,122, 94, 76,126,110,111,
- 124,193,194,195,196,197,198,199,200,201,209,210,211,212,213,214,
- 215,216,217,226,227,228,229,230,231,232,233,173,224,189, 95,109,
- 121,129,130,131,132,133,134,135,136,137,145,146,147,148,149,150,
- 151,152,153,162,163,164,165,166,167,168,169,192, 79,208,161, 7,
- 32, 33, 34, 35, 36, 37, 6, 23, 40, 41, 42, 43, 44, 9, 10, 27,
- 48, 49, 26, 51, 52, 53, 54, 8, 56, 57, 58, 59, 4, 20, 62,255,
- 65,170, 74,177,159,178,106,181,187,180,154,138,176,202,175,188,
- 144,143,234,250,190,160,182,179,157,218,155,139,183,184,185,171,
- 100,101, 98,102, 99,103,158,104,116,113,114,115,120,117,118,119,
- 172,105,237,238,235,239,236,191,128,253,254,251,252,186,174, 89,
- 68, 69, 66, 70, 67, 71,156, 72, 84, 81, 82, 83, 88, 85, 86, 87,
- 140, 73,205,206,203,207,204,225,112,221,222,219,220,141,142,223
- );
- @E2A = (
- 0, 1, 2, 3,156, 9,134,127,151,141,142, 11, 12, 13, 14, 15,
- 16, 17, 18, 19,157, 10, 8,135, 24, 25,146,143, 28, 29, 30, 31,
- 128,129,130,131,132,133, 23, 27,136,137,138,139,140, 5, 6, 7,
- 144,145, 22,147,148,149,150, 4,152,153,154,155, 20, 21,158, 26,
- 32,160,226,228,224,225,227,229,231,241,162, 46, 60, 40, 43,124,
- 38,233,234,235,232,237,238,239,236,223, 33, 36, 42, 41, 59, 94,
- 45, 47,194,196,192,193,195,197,199,209,166, 44, 37, 95, 62, 63,
- 248,201,202,203,200,205,206,207,204, 96, 58, 35, 64, 39, 61, 34,
- 216, 97, 98, 99,100,101,102,103,104,105,171,187,240,253,254,177,
- 176,106,107,108,109,110,111,112,113,114,170,186,230,184,198,164,
- 181,126,115,116,117,118,119,120,121,122,161,191,208, 91,222,174,
- 172,163,165,183,169,167,182,188,189,190,221,168,175, 93,180,215,
- 123, 65, 66, 67, 68, 69, 70, 71, 72, 73,173,244,246,242,243,245,
- 125, 74, 75, 76, 77, 78, 79, 80, 81, 82,185,251,252,249,250,255,
- 92,247, 83, 84, 85, 86, 87, 88, 89, 90,178,212,214,210,211,213,
- 48, 49, 50, 51, 52, 53, 54, 55, 56, 57,179,219,220,217,218,159
- );
- if (ord('^') == 106) { # as in the BS2000 posix-bc coded character set
- $A2E[91] = 187; $A2E[92] = 188; $A2E[94] = 106; $A2E[96] = 74;
- $A2E[123] = 251; $A2E[125] = 253; $A2E[126] = 255; $A2E[159] = 95;
- $A2E[162] = 176; $A2E[166] = 208; $A2E[168] = 121; $A2E[172] = 186;
- $A2E[175] = 161; $A2E[217] = 224; $A2E[219] = 221; $A2E[221] = 173;
- $A2E[249] = 192;
-
- $E2A[74] = 96; $E2A[95] = 159; $E2A[106] = 94; $E2A[121] = 168;
- $E2A[161] = 175; $E2A[173] = 221; $E2A[176] = 162; $E2A[186] = 172;
- $E2A[187] = 91; $E2A[188] = 92; $E2A[192] = 249; $E2A[208] = 166;
- $E2A[221] = 219; $E2A[224] = 217; $E2A[251] = 123; $E2A[253] = 125;
- $E2A[255] = 126;
- }
- elsif (ord('^') == 176) { # as in codepage 037 on os400
- $A2E[10] = 37; $A2E[91] = 186; $A2E[93] = 187; $A2E[94] = 176;
- $A2E[133] = 21; $A2E[168] = 189; $A2E[172] = 95; $A2E[221] = 173;
-
- $E2A[21] = 133; $E2A[37] = 10; $E2A[95] = 172; $E2A[173] = 221;
- $E2A[176] = 94; $E2A[186] = 91; $E2A[187] = 93; $E2A[189] = 168;
- }
- }
-
- # Smart rearrangement of parameters to allow named parameter
- # calling. We do the rearangement if:
- # the first parameter begins with a -
- sub rearrange {
- my($order,@param) = @_;
- return () unless @param;
-
- if (ref($param[0]) eq 'HASH') {
- @param = %{$param[0]};
- } else {
- return @param
- unless (defined($param[0]) && substr($param[0],0,1) eq '-');
- }
-
- # map parameters into positional indices
- my ($i,%pos);
- $i = 0;
- foreach (@$order) {
- foreach (ref($_) eq 'ARRAY' ? @$_ : $_) { $pos{lc($_)} = $i; }
- $i++;
- }
-
- my (@result,%leftover);
- $#result = $#$order; # preextend
- while (@param) {
- my $key = lc(shift(@param));
- $key =~ s/^\-//;
- if (exists $pos{$key}) {
- $result[$pos{$key}] = shift(@param);
- } else {
- $leftover{$key} = shift(@param);
- }
- }
-
- push (@result,make_attributes(\%leftover,1)) if %leftover;
- @result;
- }
-
- sub make_attributes {
- my $attr = shift;
- return () unless $attr && ref($attr) && ref($attr) eq 'HASH';
- my $escape = shift || 0;
- my(@att);
- foreach (keys %{$attr}) {
- my($key) = $_;
- $key=~s/^\-//; # get rid of initial - if present
-
- # old way: breaks EBCDIC!
- # $key=~tr/A-Z_/a-z-/; # parameters are lower case, use dashes
-
- ($key="\L$key") =~ tr/_/-/; # parameters are lower case, use dashes
-
- my $value = $escape ? simple_escape($attr->{$_}) : $attr->{$_};
- push(@att,defined($attr->{$_}) ? qq/$key="$value"/ : qq/$key/);
- }
- return @att;
- }
-
- sub simple_escape {
- return unless defined(my $toencode = shift);
- $toencode =~ s{&}{&}gso;
- $toencode =~ s{<}{<}gso;
- $toencode =~ s{>}{>}gso;
- $toencode =~ s{\"}{"}gso;
- # Doesn't work. Can't work. forget it.
- # $toencode =~ s{\x8b}{}gso;
- # $toencode =~ s{\x9b}{}gso;
- $toencode;
- }
-
- sub utf8_chr ($) {
- my $c = shift(@_);
-
- if ($c < 0x80) {
- return sprintf("%c", $c);
- } elsif ($c < 0x800) {
- return sprintf("%c%c", 0xc0 | ($c >> 6), 0x80 | ($c & 0x3f));
- } elsif ($c < 0x10000) {
- return sprintf("%c%c%c",
- 0xe0 | ($c >> 12),
- 0x80 | (($c >> 6) & 0x3f),
- 0x80 | ( $c & 0x3f));
- } elsif ($c < 0x200000) {
- return sprintf("%c%c%c%c",
- 0xf0 | ($c >> 18),
- 0x80 | (($c >> 12) & 0x3f),
- 0x80 | (($c >> 6) & 0x3f),
- 0x80 | ( $c & 0x3f));
- } elsif ($c < 0x4000000) {
- return sprintf("%c%c%c%c%c",
- 0xf8 | ($c >> 24),
- 0x80 | (($c >> 18) & 0x3f),
- 0x80 | (($c >> 12) & 0x3f),
- 0x80 | (($c >> 6) & 0x3f),
- 0x80 | ( $c & 0x3f));
-
- } elsif ($c < 0x80000000) {
- return sprintf("%c%c%c%c%c%c",
- 0xfe | ($c >> 30),
- 0x80 | (($c >> 24) & 0x3f),
- 0x80 | (($c >> 18) & 0x3f),
- 0x80 | (($c >> 12) & 0x3f),
- 0x80 | (($c >> 6) & 0x3f),
- 0x80 | ( $c & 0x3f));
- } else {
- return utf8(0xfffd);
- }
- }
-
- # unescape URL-encoded data
- sub unescape {
- shift() if @_ > 1 and (ref($_[0]) || (defined $_[1] && $_[0] eq $CGI::DefaultClass));
- my $todecode = shift;
- return undef unless defined($todecode);
- $todecode =~ tr/+/ /; # pluses become spaces
- $EBCDIC = "\t" ne "\011";
- if ($EBCDIC) {
- $todecode =~ s/%([0-9a-fA-F]{2})/chr $A2E[hex($1)]/ge;
- } else {
- $todecode =~ s/%(?:([0-9a-fA-F]{2})|u([0-9a-fA-F]{4}))/
- defined($1)? chr hex($1) : utf8_chr(hex($2))/ge;
- }
- return $todecode;
- }
-
- # URL-encode data
- sub escape {
- shift() if @_ > 1 and ( ref($_[0]) || (defined $_[1] && $_[0] eq $CGI::DefaultClass));
- my $toencode = shift;
- return undef unless defined($toencode);
- if ($EBCDIC) {
- $toencode=~s/([^a-zA-Z0-9_.-])/uc sprintf("%%%02x",$E2A[ord($1)])/eg;
- } else {
- $toencode=~s/([^a-zA-Z0-9_.-])/uc sprintf("%%%02x",ord($1))/eg;
- }
- return $toencode;
- }
-
- # This internal routine creates date strings suitable for use in
- # cookies and HTTP headers. (They differ, unfortunately.)
- # Thanks to Mark Fisher for this.
- sub expires {
- my($time,$format) = @_;
- $format ||= 'http';
-
- my(@MON)=qw/Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec/;
- my(@WDAY) = qw/Sun Mon Tue Wed Thu Fri Sat/;
-
- # pass through preformatted dates for the sake of expire_calc()
- $time = expire_calc($time);
- return $time unless $time =~ /^\d+$/;
-
- # make HTTP/cookie date string from GMT'ed time
- # (cookies use '-' as date separator, HTTP uses ' ')
- my($sc) = ' ';
- $sc = '-' if $format eq "cookie";
- my($sec,$min,$hour,$mday,$mon,$year,$wday) = gmtime($time);
- $year += 1900;
- return sprintf("%s, %02d$sc%s$sc%04d %02d:%02d:%02d GMT",
- $WDAY[$wday],$mday,$MON[$mon],$year,$hour,$min,$sec);
- }
-
- # This internal routine creates an expires time exactly some number of
- # hours from the current time. It incorporates modifications from
- # Mark Fisher.
- sub expire_calc {
- my($time) = @_;
- my(%mult) = ('s'=>1,
- 'm'=>60,
- 'h'=>60*60,
- 'd'=>60*60*24,
- 'M'=>60*60*24*30,
- 'y'=>60*60*24*365);
- # format for time can be in any of the forms...
- # "now" -- expire immediately
- # "+180s" -- in 180 seconds
- # "+2m" -- in 2 minutes
- # "+12h" -- in 12 hours
- # "+1d" -- in 1 day
- # "+3M" -- in 3 months
- # "+2y" -- in 2 years
- # "-3m" -- 3 minutes ago(!)
- # If you don't supply one of these forms, we assume you are
- # specifying the date yourself
- my($offset);
- if (!$time || (lc($time) eq 'now')) {
- $offset = 0;
- } elsif ($time=~/^\d+/) {
- return $time;
- } elsif ($time=~/^([+-]?(?:\d+|\d*\.\d*))([mhdMy]?)/) {
- $offset = ($mult{$2} || 1)*$1;
- } else {
- return $time;
- }
- return (time+$offset);
- }
-
- 1;
-
- __END__
-
- =head1 NAME
-
- CGI::Util - Internal utilities used by CGI module
-
- =head1 SYNOPSIS
-
- none
-
- =head1 DESCRIPTION
-
- no public subroutines
-
- =head1 AUTHOR INFORMATION
-
- Copyright 1995-1998, Lincoln D. Stein. All rights reserved.
-
- This library is free software; you can redistribute it and/or modify
- it under the same terms as Perl itself.
-
- Address bug reports and comments to: lstein@cshl.org. When sending
- bug reports, please provide the version of CGI.pm, the version of
- Perl, the name and version of your Web server, and the name and
- version of the operating system you are using. If the problem is even
- remotely browser dependent, please provide information about the
- affected browers as well.
-
- =head1 SEE ALSO
-
- L<CGI>
-
- =cut
-