1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
package URI::QueryParam;
use strict;
use warnings;
our $VERSION = '1.76';
sub URI::_query::query_param {
my $self = shift;
my @old = $self->query_form;
if (@_ == 0) {
# get keys
my (%seen, $i);
return grep !($i++ % 2 || $seen{$_}++), @old;
}
my $key = shift;
my @i = grep $_ % 2 == 0 && $old[$_] eq $key, 0 .. $#old;
if (@_) {
my @new = @old;
my @new_i = @i;
my @vals = map { ref($_) eq 'ARRAY' ? @$_ : $_ } @_;
while (@new_i > @vals) {
splice @new, pop @new_i, 2;
}
if (@vals > @new_i) {
my $i = @new_i ? $new_i[-1] + 2 : @new;
my @splice = splice @vals, @new_i, @vals - @new_i;
splice @new, $i, 0, map { $key => $_ } @splice;
}
if (@vals) {
#print "SET $new_i[0]\n";
@new[ map $_ + 1, @new_i ] = @vals;
}
$self->query_form(\@new);
}
return wantarray ? @old[map $_+1, @i] : @i ? $old[$i[0]+1] : undef;
}
sub URI::_query::query_param_append {
my $self = shift;
my $key = shift;
my @vals = map { ref $_ eq 'ARRAY' ? @$_ : $_ } @_;
$self->query_form($self->query_form, $key => \@vals); # XXX
return;
}
sub URI::_query::query_param_delete {
my $self = shift;
my $key = shift;
my @old = $self->query_form;
my @vals;
for (my $i = @old - 2; $i >= 0; $i -= 2) {
next if $old[$i] ne $key;
push(@vals, (splice(@old, $i, 2))[1]);
}
$self->query_form(\@old) if @vals;
return wantarray ? reverse @vals : $vals[-1];
}
sub URI::_query::query_form_hash {
my $self = shift;
my @old = $self->query_form;
if (@_) {
$self->query_form(@_ == 1 ? %{shift(@_)} : @_);
}
my %hash;
while (my($k, $v) = splice(@old, 0, 2)) {
if (exists $hash{$k}) {
for ($hash{$k}) {
$_ = [$_] unless ref($_) eq "ARRAY";
push(@$_, $v);
}
}
else {
$hash{$k} = $v;
}
}
return \%hash;
}
1;
__END__
=head1 NAME
URI::QueryParam - Additional query methods for URIs
=head1 SYNOPSIS
use URI;
use URI::QueryParam;
$u = URI->new("", "http");
$u->query_param(foo => 1, 2, 3);
print $u->query; # prints foo=1&foo=2&foo=3
for my $key ($u->query_param) {
print "$key: ", join(", ", $u->query_param($key)), "\n";
}
=head1 DESCRIPTION
Loading the C<URI::QueryParam> module adds some extra methods to
URIs that support query methods. These methods provide an alternative
interface to the $u->query_form data.
The query_param_* methods have deliberately been made identical to the
interface of the corresponding C<CGI.pm> methods.
The following additional methods are made available:
=over
=item @keys = $u->query_param
=item @values = $u->query_param( $key )
=item $first_value = $u->query_param( $key )
=item $u->query_param( $key, $value,... )
If $u->query_param is called with no arguments, it returns all the
distinct parameter keys of the URI. In a scalar context it returns the
number of distinct keys.
When a $key argument is given, the method returns the parameter values with the
given key. In a scalar context, only the first parameter value is
returned.
If additional arguments are given, they are used to update successive
parameters with the given key. If any of the values provided are
array references, then the array is dereferenced to get the actual
values.
Please note that you can supply multiple values to this method, but you cannot
supply multiple keys.
Do this:
$uri->query_param( widget_id => 1, 5, 9 );
Do NOT do this:
$uri->query_param( widget_id => 1, frobnicator_id => 99 );
=item $u->query_param_append($key, $value,...)
Adds new parameters with the given
key without touching any old parameters with the same key. It
can be explained as a more efficient version of:
$u->query_param($key,
$u->query_param($key),
$value,...);
One difference is that this expression would return the old values
of $key, whereas the query_param_append() method does not.
=item @values = $u->query_param_delete($key)
=item $first_value = $u->query_param_delete($key)
Deletes all key/value pairs with the given key.
The old values are returned. In a scalar context, only the first value
is returned.
Using the query_param_delete() method is slightly more efficient than
the equivalent:
$u->query_param($key, []);
=item $hashref = $u->query_form_hash
=item $u->query_form_hash( \%new_form )
Returns a reference to a hash that represents the
query form's key/value pairs. If a key occurs multiple times, then the hash
value becomes an array reference.
Note that sequence information is lost. This means that:
$u->query_form_hash($u->query_form_hash);
is not necessarily a no-op, as it may reorder the key/value pairs.
The values returned by the query_param() method should stay the same
though.
=back
=head1 SEE ALSO
L<URI>, L<CGI>
=head1 COPYRIGHT
Copyright 2002 Gisle Aas.
=cut
|
