X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=lib%2Fperl%2FCGI.pm;h=55e76e1c7fb4b56a79ad20148a80b10b47cb4f11;hb=65ee3e5922412b6a09e6feddb55418bd8edfbbb9;hp=aeb6c50504a52a4c8bdda50fa4e11cd1d087ebd5;hpb=6c2620fb1aa59ee5dae987b11ff038f6f107d5a3;p=libucw.git

diff --git a/lib/perl/CGI.pm b/lib/perl/CGI.pm
index aeb6c505..55e76e1c 100644
--- a/lib/perl/CGI.pm
+++ b/lib/perl/CGI.pm
@@ -1,12 +1,12 @@
 #	Poor Man's CGI Module for Perl
 #
-#	(c) 2002 Martin Mares <mj@ucw.cz>
+#	(c) 2002--2007 Martin Mares <mj@ucw.cz>
 #	Slightly modified by Tomas Valla <tom@ucw.cz>
 #
 #	This software may be freely distributed and used according to the terms
 #	of the GNU Lesser General Public License.
 
-package Sherlock::CGI;
+package UCW::CGI;
 
 use strict;
 use warnings;
@@ -17,17 +17,26 @@ BEGIN {
 	our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
 	$VERSION = 1.0;
 	@ISA = qw(Exporter);
-	@EXPORT = qw(&html_escape &url_escape &self_ref &self_form);
+	@EXPORT = qw(&html_escape &url_escape &url_param_escape &self_ref &self_form);
 	@EXPORT_OK = qw();
 	%EXPORT_TAGS = ();
 }
 
+### Escaping ###
+
 sub url_escape($) {
 	my $x = shift @_;
 	$x =~ s/([^-\$_.!*'(),0-9A-Za-z\x80-\xff])/"%".unpack('H2',$1)/ge;
 	return $x;
 }
 
+sub url_param_escape($) {
+	my $x = shift @_;
+	$x = url_escape($x);
+	$x =~ s/%20/+/g;
+	return $x;
+}
+
 sub html_escape($) {
 	my $x = shift @_;
 	$x =~ s/&/&amp;/g;
@@ -37,6 +46,41 @@ sub html_escape($) {
 	return $x;
 }
 
+### Analysing RFC 822 Style Headers ###
+
+sub rfc822_prepare($) {
+	my $x = shift @_;
+	# Convert all %'s and backslash escapes to %xx escapes
+	$x =~ s/%/%25/g;
+	$x =~ s/\\(.)/"%".unpack("H2",$1)/ge;
+	# Remove all comments, beware, they can be nested (unterminated comments are closed at EOL automatically)
+	while ($x =~ s/^(("[^"]*"|[^"(])*(\([^)]*)*)(\([^()]*(\)|$))/$1 /) { }
+	# Remove quotes and escape dangerous characters inside (again closing at the end automatically)
+	$x =~ s{"([^"]*)("|$)}{my $z=$1; $z =~ s/([^0-9a-zA-Z%_-])/"%".unpack("H2",$1)/ge; $z;}ge;
+	# All control characters are properly escaped, tokens are clearly visible.
+	# Finally remove all unnecessary spaces.
+	$x =~ s/\s+/ /g;
+	$x =~ s/(^ | $)//g;
+	$x =~ s{\s*([()<>@,;:\\"/\[\]?=])\s*}{$1}g;
+	return $x;
+}
+
+sub rfc822_deescape($) {
+	my $x = shift @_;
+	$x =~ s/%(..)/pack("H2",$1)/ge;
+	return $x;
+}
+
+### Reading of HTTP headers ###
+
+sub http_get($) {
+	my $h = shift @_;
+	$h =~ tr/a-z-/A-Z_/;
+	return $ENV{"HTTP_$h"} || $ENV{"$h"};
+}
+
+### Parsing of Arguments ###
+
 our $arg_table;
 
 sub parse_arg_string($) {
@@ -47,14 +91,16 @@ sub parse_arg_string($) {
 		my $arg = $arg_table->{$1} or next;
 		$_ = $2;
 		s/\+/ /g;
-		s/%(..)/pack("c",hex $1)/eg;
-		s/(\r|\n|\t)/ /g;
+		s/%(..)/pack("H2",$1)/eg;
+		s/\r\n/\n/g;
+		s/\r/\n/g;
+		$arg->{'multiline'} || s/(\n|\t)/ /g;
 		s/^\s+//;
 		s/\s+$//;
 		if (my $rx = $arg->{'check'}) {
 			if (!/^$rx$/) { $_ = $arg->{'default'}; }
 		}
-		
+
 		my $r = ref($arg->{'var'});
 		if ($r eq 'SCALAR') {
 			${$arg->{'var'}} = $_;
@@ -93,12 +139,15 @@ sub parse_args($) {
 	}
 }
 
+### Generating Self-ref URL's ###
+
 sub make_out_args($) {
 	my ($overrides) = @_;
 	my $out = {};
 	foreach my $name (keys %$arg_table) {
 		my $arg = $arg_table->{$name};
-		defined $arg->{'pass'} && !$arg->{'pass'} && !exists $overrides->{$name} && next;
+		defined($arg->{'var'}) || next;
+		defined($arg->{'pass'}) && !$arg->{'pass'} && !exists $overrides->{$name} && next;
 		my $value;
 		if (!defined($value = $overrides->{$name})) {
 			if (exists $overrides->{$name}) {
@@ -117,7 +166,7 @@ sub make_out_args($) {
 sub self_ref(@) {
 	my %h = @_;
 	my $out = make_out_args(\%h);
-	return "?" . join(':', map { "$_=" . url_escape($out->{$_}) } sort keys %$out);
+	return "?" . join(':', map { "$_=" . url_param_escape($out->{$_}) } sort keys %$out);
 }
 
 sub self_form(@) {
@@ -126,4 +175,42 @@ sub self_form(@) {
 	return join('', map { "<input type=hidden name=$_ value='" . html_escape($out->{$_}) . "'>\n" } sort keys %$out);
 }
 
+### Cookies
+
+sub cookie_esc($) {
+	my $x = shift @_;
+	if ($x !~ /^[a-zA-Z0-9%]+$/) {
+		$x =~ s/([\\\"])/\\$1/g;
+		$x = "\"$x\"";
+	}
+	return $x;
+}
+
+sub set_cookie($$@) {
+	my $key = shift @_;
+	my $value = shift @_;
+	my %other = @_;
+	$other{'version'} = 1 unless defined $other{'version'};
+	print "Set-Cookie: $key=", cookie_esc($value);
+	foreach my $k (keys %other) {
+		print ";$k=", cookie_esc($other{$k});
+	}
+	print "\n";
+}
+
+sub parse_cookies() {
+	my $h = http_get("Cookie") or return ();
+	my @cook = ();
+	while (my ($padding,$name,$val,$xx,$rest) = ($h =~ /\s*([,;]\s*)*([^ =]+)=([^ =,;\"]*|\"([^\"\\]|\\.)*\")(\s.*|;.*|$)/)) {
+		if ($val =~ /^\"/) {
+			$val =~ s/^\"//;
+			$val =~ s/\"$//;
+			$val =~ s/\\(.)/$1/g;
+		}
+		push @cook, $name, $val;
+		$h = $rest;
+	}
+	return @cook;
+}
+
 1;  # OK