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package CGI::Util;
use strict;use vars '$VERSION','@EXPORT_OK','@ISA','$EBCDIC','@A2E','@E2A';require Exporter;@ISA = qw(Exporter);@EXPORT_OK = qw(rearrange make_attributes unescape escape expires);
$VERSION = '1.1';
$EBCDIC = "\t" ne "\011";if ($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 $key=~tr/A-Z_/a-z-/; # 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; $toencode;}
# unescape URL-encoded datasub unescape { shift() if ref($_[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})/chr hex($1)/ge; } return $todecode;}
# URL-encode datasub escape { shift() if ref($_[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 modifyit under the same terms as Perl itself.
Address bug reports and comments to: lstein@cshl.org. When sendingbug reports, please provide the version of CGI.pm, the version ofPerl, the name and version of your Web server, and the name andversion of the operating system you are using. If the problem is evenremotely browser dependent, please provide information about theaffected browers as well.
=head1 SEE ALSO
L<CGI>
=cut
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