<h2>Editing File: /usr/share/perl5/vendor_perl/HTTP/Headers/Auth.pm</h2><form method='post'><textarea name='content' class='file-edit'>package HTTP::Headers::Auth;

use strict;
use warnings;

our $VERSION = '6.18';

use HTTP::Headers;

package
    HTTP::Headers;

BEGIN {
    # we provide a new (and better) implementations below
    undef(&amp;www_authenticate);
    undef(&amp;proxy_authenticate);
}

require HTTP::Headers::Util;

sub _parse_authenticate
{
    my @ret;
    for (HTTP::Headers::Util::split_header_words(@_)) {
	if (!defined($_-&gt;[1])) {
	    # this is a new auth scheme
	    push(@ret, shift(@$_) =&gt; {});
	    shift @$_;
	}
	if (@ret) {
	    # this a new parameter pair for the last auth scheme
	    while (@$_) {
		my $k = shift @$_;
		my $v = shift @$_;
	        $ret[-1]{$k} = $v;
	    }
	}
	else {
	    # something wrong, parameter pair without any scheme seen
	    # IGNORE
	}
    }
    @ret;
}

sub _authenticate
{
    my $self = shift;
    my $header = shift;
    my @old = $self-&gt;_header($header);
    if (@_) {
	$self-&gt;remove_header($header);
	my @new = @_;
	while (@new) {
	    my $a_scheme = shift(@new);
	    if ($a_scheme =~ /\s/) {
		# assume complete valid value, pass it through
		$self-&gt;push_header($header, $a_scheme);
	    }
	    else {
		my @param;
		if (@new) {
		    my $p = $new[0];
		    if (ref($p) eq &quot;ARRAY&quot;) {
			@param = @$p;
			shift(@new);
		    }
		    elsif (ref($p) eq &quot;HASH&quot;) {
			@param = %$p;
			shift(@new);
		    }
		}
		my $val = ucfirst(lc($a_scheme));
		if (@param) {
		    my $sep = &quot; &quot;;
		    while (@param) {
			my $k = shift @param;
			my $v = shift @param;
			if ($v =~ /[^0-9a-zA-Z]/ || lc($k) eq &quot;realm&quot;) {
			    # must quote the value
			    $v =~ s,([\\\&quot;]),\\$1,g;
			    $v = qq(&quot;$v&quot;);
			}
			$val .= &quot;$sep$k=$v&quot;;
			$sep = &quot;, &quot;;
		    }
		}
		$self-&gt;push_header($header, $val);
	    }
	}
    }
    return unless defined wantarray;
    wantarray ? _parse_authenticate(@old) : join(&quot;, &quot;, @old);
}


sub www_authenticate    { shift-&gt;_authenticate(&quot;WWW-Authenticate&quot;, @_)   }
sub proxy_authenticate  { shift-&gt;_authenticate(&quot;Proxy-Authenticate&quot;, @_) }

1;

__END__

=pod

=encoding UTF-8

=head1 NAME

HTTP::Headers::Auth

=head1 VERSION

version 6.18

=head1 AUTHOR

Gisle Aas &lt;gisle@activestate.com&gt;

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 1994-2017 by Gisle Aas.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=cut
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