[24921] | 1 | package JSON::PP;
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| 2 |
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| 3 | # JSON-2.0
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| 4 |
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| 5 | use 5.005;
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| 6 | use strict;
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| 7 | use base qw(Exporter);
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| 8 | use overload ();
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| 9 |
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| 10 | use Carp ();
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| 11 | use B ();
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| 12 | #use Devel::Peek;
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| 13 |
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| 14 | $JSON::PP::VERSION = '2.27008';
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| 15 |
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| 16 | @JSON::PP::EXPORT = qw(encode_json decode_json from_json to_json);
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| 17 |
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| 18 | # instead of hash-access, i tried index-access for speed.
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| 19 | # but this method is not faster than what i expected. so it will be changed.
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| 20 |
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| 21 | use constant P_ASCII => 0;
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| 22 | use constant P_LATIN1 => 1;
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| 23 | use constant P_UTF8 => 2;
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| 24 | use constant P_INDENT => 3;
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| 25 | use constant P_CANONICAL => 4;
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| 26 | use constant P_SPACE_BEFORE => 5;
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| 27 | use constant P_SPACE_AFTER => 6;
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| 28 | use constant P_ALLOW_NONREF => 7;
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| 29 | use constant P_SHRINK => 8;
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| 30 | use constant P_ALLOW_BLESSED => 9;
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| 31 | use constant P_CONVERT_BLESSED => 10;
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| 32 | use constant P_RELAXED => 11;
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| 33 |
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| 34 | use constant P_LOOSE => 12;
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| 35 | use constant P_ALLOW_BIGNUM => 13;
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| 36 | use constant P_ALLOW_BAREKEY => 14;
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| 37 | use constant P_ALLOW_SINGLEQUOTE => 15;
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| 38 | use constant P_ESCAPE_SLASH => 16;
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| 39 | use constant P_AS_NONBLESSED => 17;
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| 40 |
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| 41 | use constant P_ALLOW_UNKNOWN => 18;
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| 42 |
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| 43 | use constant OLD_PERL => $] < 5.008 ? 1 : 0;
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| 44 |
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| 45 | BEGIN {
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| 46 | my @xs_compati_bit_properties = qw(
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| 47 | latin1 ascii utf8 indent canonical space_before space_after allow_nonref shrink
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| 48 | allow_blessed convert_blessed relaxed allow_unknown
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| 49 | );
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| 50 | my @pp_bit_properties = qw(
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| 51 | allow_singlequote allow_bignum loose
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| 52 | allow_barekey escape_slash as_nonblessed
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| 53 | );
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| 54 |
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| 55 | # Perl version check, Unicode handling is enable?
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| 56 | # Helper module sets @JSON::PP::_properties.
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| 57 |
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| 58 | my $helper = $] >= 5.008 ? 'JSON::PP58'
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| 59 | : $] >= 5.006 ? 'JSON::PP56'
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| 60 | : 'JSON::PP5005'
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| 61 | ;
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| 62 |
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| 63 | eval qq| require $helper |;
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| 64 | if ($@) { Carp::croak $@; }
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| 65 |
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| 66 | for my $name (@xs_compati_bit_properties, @pp_bit_properties) {
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| 67 | my $flag_name = 'P_' . uc($name);
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| 68 |
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| 69 | eval qq/
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| 70 | sub $name {
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| 71 | my \$enable = defined \$_[1] ? \$_[1] : 1;
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| 72 |
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| 73 | if (\$enable) {
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| 74 | \$_[0]->{PROPS}->[$flag_name] = 1;
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| 75 | }
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| 76 | else {
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| 77 | \$_[0]->{PROPS}->[$flag_name] = 0;
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| 78 | }
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| 79 |
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| 80 | \$_[0];
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| 81 | }
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| 82 |
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| 83 | sub get_$name {
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| 84 | \$_[0]->{PROPS}->[$flag_name] ? 1 : '';
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| 85 | }
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| 86 | /;
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| 87 | }
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| 88 |
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| 89 | }
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| 90 |
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| 91 |
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| 92 |
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| 93 | # Functions
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| 94 |
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| 95 | my %encode_allow_method
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| 96 | = map {($_ => 1)} qw/utf8 pretty allow_nonref latin1 self_encode escape_slash
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| 97 | allow_blessed convert_blessed indent indent_length allow_bignum
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| 98 | as_nonblessed
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| 99 | /;
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| 100 | my %decode_allow_method
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| 101 | = map {($_ => 1)} qw/utf8 allow_nonref loose allow_singlequote allow_bignum
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| 102 | allow_barekey max_size relaxed/;
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| 103 |
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| 104 |
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| 105 | my $JSON; # cache
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| 106 |
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| 107 | sub encode_json ($) { # encode
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| 108 | ($JSON ||= __PACKAGE__->new->utf8)->encode(@_);
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| 109 | }
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| 110 |
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| 111 |
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| 112 | sub decode_json { # decode
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| 113 | ($JSON ||= __PACKAGE__->new->utf8)->decode(@_);
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| 114 | }
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| 115 |
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| 116 | # Obsoleted
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| 117 |
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| 118 | sub to_json($) {
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| 119 | Carp::croak ("JSON::PP::to_json has been renamed to encode_json.");
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| 120 | }
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| 121 |
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| 122 |
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| 123 | sub from_json($) {
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| 124 | Carp::croak ("JSON::PP::from_json has been renamed to decode_json.");
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| 125 | }
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| 126 |
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| 127 |
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| 128 | # Methods
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| 129 |
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| 130 | sub new {
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| 131 | my $class = shift;
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| 132 | my $self = {
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| 133 | max_depth => 512,
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| 134 | max_size => 0,
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| 135 | indent => 0,
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| 136 | FLAGS => 0,
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| 137 | fallback => sub { encode_error('Invalid value. JSON can only reference.') },
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| 138 | indent_length => 3,
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| 139 | };
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| 140 |
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| 141 | bless $self, $class;
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| 142 | }
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| 143 |
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| 144 |
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| 145 | sub encode {
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| 146 | return $_[0]->PP_encode_json($_[1]);
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| 147 | }
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| 148 |
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| 149 |
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| 150 | sub decode {
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| 151 | return $_[0]->PP_decode_json($_[1], 0x00000000);
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| 152 | }
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| 153 |
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| 154 |
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| 155 | sub decode_prefix {
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| 156 | return $_[0]->PP_decode_json($_[1], 0x00000001);
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| 157 | }
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| 158 |
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| 159 |
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| 160 | # accessor
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| 161 |
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| 162 |
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| 163 | # pretty printing
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| 164 |
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| 165 | sub pretty {
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| 166 | my ($self, $v) = @_;
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| 167 | my $enable = defined $v ? $v : 1;
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| 168 |
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| 169 | if ($enable) { # indent_length(3) for JSON::XS compatibility
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| 170 | $self->indent(1)->indent_length(3)->space_before(1)->space_after(1);
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| 171 | }
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| 172 | else {
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| 173 | $self->indent(0)->space_before(0)->space_after(0);
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| 174 | }
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| 175 |
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| 176 | $self;
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| 177 | }
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| 178 |
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| 179 | # etc
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| 180 |
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| 181 | sub max_depth {
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| 182 | my $max = defined $_[1] ? $_[1] : 0x80000000;
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| 183 | $_[0]->{max_depth} = $max;
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| 184 | $_[0];
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| 185 | }
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| 186 |
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| 187 |
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| 188 | sub get_max_depth { $_[0]->{max_depth}; }
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| 189 |
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| 190 |
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| 191 | sub max_size {
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| 192 | my $max = defined $_[1] ? $_[1] : 0;
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| 193 | $_[0]->{max_size} = $max;
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| 194 | $_[0];
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| 195 | }
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| 196 |
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| 197 |
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| 198 | sub get_max_size { $_[0]->{max_size}; }
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| 199 |
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| 200 |
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| 201 | sub filter_json_object {
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| 202 | $_[0]->{cb_object} = defined $_[1] ? $_[1] : 0;
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| 203 | $_[0]->{F_HOOK} = ($_[0]->{cb_object} or $_[0]->{cb_sk_object}) ? 1 : 0;
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| 204 | $_[0];
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| 205 | }
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| 206 |
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| 207 | sub filter_json_single_key_object {
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| 208 | if (@_ > 1) {
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| 209 | $_[0]->{cb_sk_object}->{$_[1]} = $_[2];
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| 210 | }
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| 211 | $_[0]->{F_HOOK} = ($_[0]->{cb_object} or $_[0]->{cb_sk_object}) ? 1 : 0;
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| 212 | $_[0];
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| 213 | }
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| 214 |
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| 215 | sub indent_length {
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| 216 | if (!defined $_[1] or $_[1] > 15 or $_[1] < 0) {
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| 217 | Carp::carp "The acceptable range of indent_length() is 0 to 15.";
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| 218 | }
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| 219 | else {
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| 220 | $_[0]->{indent_length} = $_[1];
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| 221 | }
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| 222 | $_[0];
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| 223 | }
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| 224 |
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| 225 | sub get_indent_length {
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| 226 | $_[0]->{indent_length};
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| 227 | }
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| 228 |
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| 229 | sub sort_by {
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| 230 | $_[0]->{sort_by} = defined $_[1] ? $_[1] : 1;
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| 231 | $_[0];
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| 232 | }
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| 233 |
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| 234 | sub allow_bigint {
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| 235 | Carp::carp("allow_bigint() is obsoleted. use allow_bignum() insted.");
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| 236 | }
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| 237 |
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| 238 | ###############################
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| 239 |
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| 240 | ###
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| 241 | ### Perl => JSON
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| 242 | ###
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| 243 |
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| 244 |
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| 245 | { # Convert
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| 246 |
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| 247 | my $max_depth;
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| 248 | my $indent;
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| 249 | my $ascii;
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| 250 | my $latin1;
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| 251 | my $utf8;
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| 252 | my $space_before;
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| 253 | my $space_after;
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| 254 | my $canonical;
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| 255 | my $allow_blessed;
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| 256 | my $convert_blessed;
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| 257 |
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| 258 | my $indent_length;
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| 259 | my $escape_slash;
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| 260 | my $bignum;
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| 261 | my $as_nonblessed;
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| 262 |
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| 263 | my $depth;
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| 264 | my $indent_count;
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| 265 | my $keysort;
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| 266 |
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| 267 |
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| 268 | sub PP_encode_json {
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| 269 | my $self = shift;
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| 270 | my $obj = shift;
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| 271 |
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| 272 | $indent_count = 0;
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| 273 | $depth = 0;
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| 274 |
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| 275 | my $idx = $self->{PROPS};
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| 276 |
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| 277 | ($ascii, $latin1, $utf8, $indent, $canonical, $space_before, $space_after, $allow_blessed,
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| 278 | $convert_blessed, $escape_slash, $bignum, $as_nonblessed)
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| 279 | = @{$idx}[P_ASCII .. P_SPACE_AFTER, P_ALLOW_BLESSED, P_CONVERT_BLESSED,
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| 280 | P_ESCAPE_SLASH, P_ALLOW_BIGNUM, P_AS_NONBLESSED];
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| 281 |
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| 282 | ($max_depth, $indent_length) = @{$self}{qw/max_depth indent_length/};
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| 283 |
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| 284 | $keysort = $canonical ? sub { $a cmp $b } : undef;
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| 285 |
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| 286 | if ($self->{sort_by}) {
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| 287 | $keysort = ref($self->{sort_by}) eq 'CODE' ? $self->{sort_by}
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| 288 | : $self->{sort_by} =~ /\D+/ ? $self->{sort_by}
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| 289 | : sub { $a cmp $b };
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| 290 | }
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| 291 |
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| 292 | encode_error("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)")
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| 293 | if(!ref $obj and !$idx->[ P_ALLOW_NONREF ]);
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| 294 |
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| 295 | my $str = $self->object_to_json($obj);
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| 296 |
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| 297 | $str .= "\n" if ( $indent ); # JSON::XS 2.26 compatible
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| 298 |
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| 299 | unless ($ascii or $latin1 or $utf8) {
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| 300 | utf8::upgrade($str);
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| 301 | }
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| 302 |
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| 303 | if ($idx->[ P_SHRINK ]) {
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| 304 | utf8::downgrade($str, 1);
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| 305 | }
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| 306 |
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| 307 | return $str;
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| 308 | }
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| 309 |
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| 310 |
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| 311 | sub object_to_json {
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| 312 | my ($self, $obj) = @_;
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| 313 | my $type = ref($obj);
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| 314 |
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| 315 | if($type eq 'HASH'){
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| 316 | return $self->hash_to_json($obj);
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| 317 | }
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| 318 | elsif($type eq 'ARRAY'){
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| 319 | return $self->array_to_json($obj);
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| 320 | }
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| 321 | elsif ($type) { # blessed object?
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| 322 | if (blessed($obj)) {
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| 323 |
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| 324 | return $self->value_to_json($obj) if ( $obj->isa('JSON::PP::Boolean') );
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| 325 |
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| 326 | if ( $convert_blessed and $obj->can('TO_JSON') ) {
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| 327 | my $result = $obj->TO_JSON();
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| 328 | if ( defined $result and overload::Overloaded( $obj ) ) {
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| 329 | if ( overload::StrVal( $obj ) eq $result ) {
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| 330 | encode_error( sprintf(
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| 331 | "%s::TO_JSON method returned same object as was passed instead of a new one",
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| 332 | ref $obj
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| 333 | ) );
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| 334 | }
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| 335 | }
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| 336 |
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| 337 | return $self->object_to_json( $result );
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| 338 | }
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| 339 |
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| 340 | return "$obj" if ( $bignum and _is_bignum($obj) );
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| 341 | return $self->blessed_to_json($obj) if ($allow_blessed and $as_nonblessed); # will be removed.
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| 342 |
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| 343 | encode_error( sprintf("encountered object '%s', but neither allow_blessed "
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| 344 | . "nor convert_blessed settings are enabled", $obj)
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| 345 | ) unless ($allow_blessed);
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| 346 |
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| 347 | return 'null';
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| 348 | }
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| 349 | else {
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| 350 | return $self->value_to_json($obj);
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| 351 | }
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| 352 | }
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| 353 | else{
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| 354 | return $self->value_to_json($obj);
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| 355 | }
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| 356 | }
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| 357 |
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| 358 |
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| 359 | sub hash_to_json {
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| 360 | my ($self, $obj) = @_;
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| 361 | my @res;
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| 362 |
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| 363 | encode_error("json text or perl structure exceeds maximum nesting level (max_depth set too low?)")
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| 364 | if (++$depth > $max_depth);
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| 365 |
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| 366 | my ($pre, $post) = $indent ? $self->_up_indent() : ('', '');
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| 367 | my $del = ($space_before ? ' ' : '') . ':' . ($space_after ? ' ' : '');
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| 368 |
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| 369 | for my $k ( _sort( $obj ) ) {
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| 370 | if ( OLD_PERL ) { utf8::decode($k) } # key for Perl 5.6 / be optimized
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| 371 | push @res, string_to_json( $self, $k )
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| 372 | . $del
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| 373 | . ( $self->object_to_json( $obj->{$k} ) || $self->value_to_json( $obj->{$k} ) );
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| 374 | }
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| 375 |
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| 376 | --$depth;
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| 377 | $self->_down_indent() if ($indent);
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| 378 |
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| 379 | return '{' . ( @res ? $pre : '' ) . ( @res ? join( ",$pre", @res ) . $post : '' ) . '}';
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| 380 | }
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| 381 |
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| 382 |
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| 383 | sub array_to_json {
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| 384 | my ($self, $obj) = @_;
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| 385 | my @res;
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| 386 |
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| 387 | encode_error("json text or perl structure exceeds maximum nesting level (max_depth set too low?)")
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| 388 | if (++$depth > $max_depth);
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| 389 |
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| 390 | my ($pre, $post) = $indent ? $self->_up_indent() : ('', '');
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| 391 |
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| 392 | for my $v (@$obj){
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| 393 | push @res, $self->object_to_json($v) || $self->value_to_json($v);
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| 394 | }
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| 395 |
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| 396 | --$depth;
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| 397 | $self->_down_indent() if ($indent);
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| 398 |
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| 399 | return '[' . ( @res ? $pre : '' ) . ( @res ? join( ",$pre", @res ) . $post : '' ) . ']';
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| 400 | }
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| 401 |
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| 402 |
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| 403 | sub value_to_json {
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| 404 | my ($self, $value) = @_;
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| 405 |
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| 406 | return 'null' if(!defined $value);
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| 407 |
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| 408 | my $b_obj = B::svref_2object(\$value); # for round trip problem
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| 409 | my $flags = $b_obj->FLAGS;
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| 410 |
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| 411 | return $value # as is
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| 412 | if $flags & ( B::SVp_IOK | B::SVp_NOK ) and !( $flags & B::SVp_POK ); # SvTYPE is IV or NV?
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| 413 |
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| 414 | my $type = ref($value);
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| 415 |
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| 416 | if(!$type){
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| 417 | return string_to_json($self, $value);
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| 418 | }
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| 419 | elsif( blessed($value) and $value->isa('JSON::PP::Boolean') ){
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| 420 | return $$value == 1 ? 'true' : 'false';
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| 421 | }
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| 422 | elsif ($type) {
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| 423 | if ((overload::StrVal($value) =~ /=(\w+)/)[0]) {
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| 424 | return $self->value_to_json("$value");
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| 425 | }
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| 426 |
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| 427 | if ($type eq 'SCALAR' and defined $$value) {
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| 428 | return $$value eq '1' ? 'true'
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| 429 | : $$value eq '0' ? 'false'
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| 430 | : $self->{PROPS}->[ P_ALLOW_UNKNOWN ] ? 'null'
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| 431 | : encode_error("cannot encode reference to scalar");
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| 432 | }
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| 433 |
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| 434 | if ( $self->{PROPS}->[ P_ALLOW_UNKNOWN ] ) {
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| 435 | return 'null';
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| 436 | }
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| 437 | else {
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| 438 | if ( $type eq 'SCALAR' or $type eq 'REF' ) {
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| 439 | encode_error("cannot encode reference to scalar");
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| 440 | }
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| 441 | else {
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| 442 | encode_error("encountered $value, but JSON can only represent references to arrays or hashes");
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| 443 | }
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| 444 | }
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| 445 |
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| 446 | }
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| 447 | else {
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| 448 | return $self->{fallback}->($value)
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| 449 | if ($self->{fallback} and ref($self->{fallback}) eq 'CODE');
|
---|
| 450 | return 'null';
|
---|
| 451 | }
|
---|
| 452 |
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 |
|
---|
| 456 | my %esc = (
|
---|
| 457 | "\n" => '\n',
|
---|
| 458 | "\r" => '\r',
|
---|
| 459 | "\t" => '\t',
|
---|
| 460 | "\f" => '\f',
|
---|
| 461 | "\b" => '\b',
|
---|
| 462 | "\"" => '\"',
|
---|
| 463 | "\\" => '\\\\',
|
---|
| 464 | "\'" => '\\\'',
|
---|
| 465 | );
|
---|
| 466 |
|
---|
| 467 |
|
---|
| 468 | sub string_to_json {
|
---|
| 469 | my ($self, $arg) = @_;
|
---|
| 470 |
|
---|
| 471 | $arg =~ s/([\x22\x5c\n\r\t\f\b])/$esc{$1}/g;
|
---|
| 472 | $arg =~ s/\//\\\//g if ($escape_slash);
|
---|
| 473 | $arg =~ s/([\x00-\x08\x0b\x0e-\x1f])/'\\u00' . unpack('H2', $1)/eg;
|
---|
| 474 |
|
---|
| 475 | if ($ascii) {
|
---|
| 476 | $arg = JSON_PP_encode_ascii($arg);
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | if ($latin1) {
|
---|
| 480 | $arg = JSON_PP_encode_latin1($arg);
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 | if ($utf8) {
|
---|
| 484 | utf8::encode($arg);
|
---|
| 485 | }
|
---|
| 486 |
|
---|
| 487 | return '"' . $arg . '"';
|
---|
| 488 | }
|
---|
| 489 |
|
---|
| 490 |
|
---|
| 491 | sub blessed_to_json {
|
---|
| 492 | my $reftype = reftype($_[1]) || '';
|
---|
| 493 | if ($reftype eq 'HASH') {
|
---|
| 494 | return $_[0]->hash_to_json($_[1]);
|
---|
| 495 | }
|
---|
| 496 | elsif ($reftype eq 'ARRAY') {
|
---|
| 497 | return $_[0]->array_to_json($_[1]);
|
---|
| 498 | }
|
---|
| 499 | else {
|
---|
| 500 | return 'null';
|
---|
| 501 | }
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 |
|
---|
| 505 | sub encode_error {
|
---|
| 506 | my $error = shift;
|
---|
| 507 | Carp::croak "$error";
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 |
|
---|
| 511 | sub _sort {
|
---|
| 512 | defined $keysort ? (sort $keysort (keys %{$_[0]})) : keys %{$_[0]};
|
---|
| 513 | }
|
---|
| 514 |
|
---|
| 515 |
|
---|
| 516 | sub _up_indent {
|
---|
| 517 | my $self = shift;
|
---|
| 518 | my $space = ' ' x $indent_length;
|
---|
| 519 |
|
---|
| 520 | my ($pre,$post) = ('','');
|
---|
| 521 |
|
---|
| 522 | $post = "\n" . $space x $indent_count;
|
---|
| 523 |
|
---|
| 524 | $indent_count++;
|
---|
| 525 |
|
---|
| 526 | $pre = "\n" . $space x $indent_count;
|
---|
| 527 |
|
---|
| 528 | return ($pre,$post);
|
---|
| 529 | }
|
---|
| 530 |
|
---|
| 531 |
|
---|
| 532 | sub _down_indent { $indent_count--; }
|
---|
| 533 |
|
---|
| 534 |
|
---|
| 535 | sub PP_encode_box {
|
---|
| 536 | {
|
---|
| 537 | depth => $depth,
|
---|
| 538 | indent_count => $indent_count,
|
---|
| 539 | };
|
---|
| 540 | }
|
---|
| 541 |
|
---|
| 542 | } # Convert
|
---|
| 543 |
|
---|
| 544 |
|
---|
| 545 | sub _encode_ascii {
|
---|
| 546 | join('',
|
---|
| 547 | map {
|
---|
| 548 | $_ <= 127 ?
|
---|
| 549 | chr($_) :
|
---|
| 550 | $_ <= 65535 ?
|
---|
| 551 | sprintf('\u%04x', $_) : sprintf('\u%x\u%x', _encode_surrogates($_));
|
---|
| 552 | } unpack('U*', $_[0])
|
---|
| 553 | );
|
---|
| 554 | }
|
---|
| 555 |
|
---|
| 556 |
|
---|
| 557 | sub _encode_latin1 {
|
---|
| 558 | join('',
|
---|
| 559 | map {
|
---|
| 560 | $_ <= 255 ?
|
---|
| 561 | chr($_) :
|
---|
| 562 | $_ <= 65535 ?
|
---|
| 563 | sprintf('\u%04x', $_) : sprintf('\u%x\u%x', _encode_surrogates($_));
|
---|
| 564 | } unpack('U*', $_[0])
|
---|
| 565 | );
|
---|
| 566 | }
|
---|
| 567 |
|
---|
| 568 |
|
---|
| 569 | sub _encode_surrogates { # from perlunicode
|
---|
| 570 | my $uni = $_[0] - 0x10000;
|
---|
| 571 | return ($uni / 0x400 + 0xD800, $uni % 0x400 + 0xDC00);
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 |
|
---|
| 575 | sub _is_bignum {
|
---|
| 576 | $_[0]->isa('Math::BigInt') or $_[0]->isa('Math::BigFloat');
|
---|
| 577 | }
|
---|
| 578 |
|
---|
| 579 |
|
---|
| 580 |
|
---|
| 581 | #
|
---|
| 582 | # JSON => Perl
|
---|
| 583 | #
|
---|
| 584 |
|
---|
| 585 | my $max_intsize;
|
---|
| 586 |
|
---|
| 587 | BEGIN {
|
---|
| 588 | my $checkint = 1111;
|
---|
| 589 | for my $d (5..64) {
|
---|
| 590 | $checkint .= 1;
|
---|
| 591 | my $int = eval qq| $checkint |;
|
---|
| 592 | if ($int =~ /[eE]/) {
|
---|
| 593 | $max_intsize = $d - 1;
|
---|
| 594 | last;
|
---|
| 595 | }
|
---|
| 596 | }
|
---|
| 597 | }
|
---|
| 598 |
|
---|
| 599 | { # PARSE
|
---|
| 600 |
|
---|
| 601 | my %escapes = ( # by Jeremy Muhlich <jmuhlich [at] bitflood.org>
|
---|
| 602 | b => "\x8",
|
---|
| 603 | t => "\x9",
|
---|
| 604 | n => "\xA",
|
---|
| 605 | f => "\xC",
|
---|
| 606 | r => "\xD",
|
---|
| 607 | '\\' => '\\',
|
---|
| 608 | '"' => '"',
|
---|
| 609 | '/' => '/',
|
---|
| 610 | );
|
---|
| 611 |
|
---|
| 612 | my $text; # json data
|
---|
| 613 | my $at; # offset
|
---|
| 614 | my $ch; # 1chracter
|
---|
| 615 | my $len; # text length (changed according to UTF8 or NON UTF8)
|
---|
| 616 | # INTERNAL
|
---|
| 617 | my $depth; # nest counter
|
---|
| 618 | my $encoding; # json text encoding
|
---|
| 619 | my $is_valid_utf8; # temp variable
|
---|
| 620 | my $utf8_len; # utf8 byte length
|
---|
| 621 | # FLAGS
|
---|
| 622 | my $utf8; # must be utf8
|
---|
| 623 | my $max_depth; # max nest nubmer of objects and arrays
|
---|
| 624 | my $max_size;
|
---|
| 625 | my $relaxed;
|
---|
| 626 | my $cb_object;
|
---|
| 627 | my $cb_sk_object;
|
---|
| 628 |
|
---|
| 629 | my $F_HOOK;
|
---|
| 630 |
|
---|
| 631 | my $allow_bigint; # using Math::BigInt
|
---|
| 632 | my $singlequote; # loosely quoting
|
---|
| 633 | my $loose; #
|
---|
| 634 | my $allow_barekey; # bareKey
|
---|
| 635 |
|
---|
| 636 | # $opt flag
|
---|
| 637 | # 0x00000001 .... decode_prefix
|
---|
| 638 | # 0x10000000 .... incr_parse
|
---|
| 639 |
|
---|
| 640 | sub PP_decode_json {
|
---|
| 641 | my ($self, $opt); # $opt is an effective flag during this decode_json.
|
---|
| 642 |
|
---|
| 643 | ($self, $text, $opt) = @_;
|
---|
| 644 |
|
---|
| 645 | ($at, $ch, $depth) = (0, '', 0);
|
---|
| 646 |
|
---|
| 647 | if ( !defined $text or ref $text ) {
|
---|
| 648 | decode_error("malformed JSON string, neither array, object, number, string or atom");
|
---|
| 649 | }
|
---|
| 650 |
|
---|
| 651 | my $idx = $self->{PROPS};
|
---|
| 652 |
|
---|
| 653 | ($utf8, $relaxed, $loose, $allow_bigint, $allow_barekey, $singlequote)
|
---|
| 654 | = @{$idx}[P_UTF8, P_RELAXED, P_LOOSE .. P_ALLOW_SINGLEQUOTE];
|
---|
| 655 |
|
---|
| 656 | if ( $utf8 ) {
|
---|
| 657 | utf8::downgrade( $text, 1 ) or Carp::croak("Wide character in subroutine entry");
|
---|
| 658 | }
|
---|
| 659 | else {
|
---|
| 660 | utf8::upgrade( $text );
|
---|
| 661 | }
|
---|
| 662 |
|
---|
| 663 | $len = length $text;
|
---|
| 664 |
|
---|
| 665 | ($max_depth, $max_size, $cb_object, $cb_sk_object, $F_HOOK)
|
---|
| 666 | = @{$self}{qw/max_depth max_size cb_object cb_sk_object F_HOOK/};
|
---|
| 667 |
|
---|
| 668 | if ($max_size > 1) {
|
---|
| 669 | use bytes;
|
---|
| 670 | my $bytes = length $text;
|
---|
| 671 | decode_error(
|
---|
| 672 | sprintf("attempted decode of JSON text of %s bytes size, but max_size is set to %s"
|
---|
| 673 | , $bytes, $max_size), 1
|
---|
| 674 | ) if ($bytes > $max_size);
|
---|
| 675 | }
|
---|
| 676 |
|
---|
| 677 | # Currently no effect
|
---|
| 678 | # should use regexp
|
---|
| 679 | my @octets = unpack('C4', $text);
|
---|
| 680 | $encoding = ( $octets[0] and $octets[1]) ? 'UTF-8'
|
---|
| 681 | : (!$octets[0] and $octets[1]) ? 'UTF-16BE'
|
---|
| 682 | : (!$octets[0] and !$octets[1]) ? 'UTF-32BE'
|
---|
| 683 | : ( $octets[2] ) ? 'UTF-16LE'
|
---|
| 684 | : (!$octets[2] ) ? 'UTF-32LE'
|
---|
| 685 | : 'unknown';
|
---|
| 686 |
|
---|
| 687 | white(); # remove head white space
|
---|
| 688 |
|
---|
| 689 | my $valid_start = defined $ch; # Is there a first character for JSON structure?
|
---|
| 690 |
|
---|
| 691 | my $result = value();
|
---|
| 692 |
|
---|
| 693 | return undef if ( !$result && ( $opt & 0x10000000 ) ); # for incr_parse
|
---|
| 694 |
|
---|
| 695 | decode_error("malformed JSON string, neither array, object, number, string or atom") unless $valid_start;
|
---|
| 696 |
|
---|
| 697 | if ( !$idx->[ P_ALLOW_NONREF ] and !ref $result ) {
|
---|
| 698 | decode_error(
|
---|
| 699 | 'JSON text must be an object or array (but found number, string, true, false or null,'
|
---|
| 700 | . ' use allow_nonref to allow this)', 1);
|
---|
| 701 | }
|
---|
| 702 |
|
---|
| 703 | Carp::croak('something wrong.') if $len < $at; # we won't arrive here.
|
---|
| 704 |
|
---|
| 705 | my $consumed = defined $ch ? $at - 1 : $at; # consumed JSON text length
|
---|
| 706 |
|
---|
| 707 | white(); # remove tail white space
|
---|
| 708 |
|
---|
| 709 | if ( $ch ) {
|
---|
| 710 | return ( $result, $consumed ) if ($opt & 0x00000001); # all right if decode_prefix
|
---|
| 711 | decode_error("garbage after JSON object");
|
---|
| 712 | }
|
---|
| 713 |
|
---|
| 714 | ( $opt & 0x00000001 ) ? ( $result, $consumed ) : $result;
|
---|
| 715 | }
|
---|
| 716 |
|
---|
| 717 |
|
---|
| 718 | sub next_chr {
|
---|
| 719 | return $ch = undef if($at >= $len);
|
---|
| 720 | $ch = substr($text, $at++, 1);
|
---|
| 721 | }
|
---|
| 722 |
|
---|
| 723 |
|
---|
| 724 | sub value {
|
---|
| 725 | white();
|
---|
| 726 | return if(!defined $ch);
|
---|
| 727 | return object() if($ch eq '{');
|
---|
| 728 | return array() if($ch eq '[');
|
---|
| 729 | return string() if($ch eq '"' or ($singlequote and $ch eq "'"));
|
---|
| 730 | return number() if($ch =~ /[0-9]/ or $ch eq '-');
|
---|
| 731 | return word();
|
---|
| 732 | }
|
---|
| 733 |
|
---|
| 734 | sub string {
|
---|
| 735 | my ($i, $s, $t, $u);
|
---|
| 736 | my $utf16;
|
---|
| 737 | my $is_utf8;
|
---|
| 738 |
|
---|
| 739 | ($is_valid_utf8, $utf8_len) = ('', 0);
|
---|
| 740 |
|
---|
| 741 | $s = ''; # basically UTF8 flag on
|
---|
| 742 |
|
---|
| 743 | if($ch eq '"' or ($singlequote and $ch eq "'")){
|
---|
| 744 | my $boundChar = $ch;
|
---|
| 745 |
|
---|
| 746 | OUTER: while( defined(next_chr()) ){
|
---|
| 747 |
|
---|
| 748 | if($ch eq $boundChar){
|
---|
| 749 | next_chr();
|
---|
| 750 |
|
---|
| 751 | if ($utf16) {
|
---|
| 752 | decode_error("missing low surrogate character in surrogate pair");
|
---|
| 753 | }
|
---|
| 754 |
|
---|
| 755 | utf8::decode($s) if($is_utf8);
|
---|
| 756 |
|
---|
| 757 | return $s;
|
---|
| 758 | }
|
---|
| 759 | elsif($ch eq '\\'){
|
---|
| 760 | next_chr();
|
---|
| 761 | if(exists $escapes{$ch}){
|
---|
| 762 | $s .= $escapes{$ch};
|
---|
| 763 | }
|
---|
| 764 | elsif($ch eq 'u'){ # UNICODE handling
|
---|
| 765 | my $u = '';
|
---|
| 766 |
|
---|
| 767 | for(1..4){
|
---|
| 768 | $ch = next_chr();
|
---|
| 769 | last OUTER if($ch !~ /[0-9a-fA-F]/);
|
---|
| 770 | $u .= $ch;
|
---|
| 771 | }
|
---|
| 772 |
|
---|
| 773 | # U+D800 - U+DBFF
|
---|
| 774 | if ($u =~ /^[dD][89abAB][0-9a-fA-F]{2}/) { # UTF-16 high surrogate?
|
---|
| 775 | $utf16 = $u;
|
---|
| 776 | }
|
---|
| 777 | # U+DC00 - U+DFFF
|
---|
| 778 | elsif ($u =~ /^[dD][c-fC-F][0-9a-fA-F]{2}/) { # UTF-16 low surrogate?
|
---|
| 779 | unless (defined $utf16) {
|
---|
| 780 | decode_error("missing high surrogate character in surrogate pair");
|
---|
| 781 | }
|
---|
| 782 | $is_utf8 = 1;
|
---|
| 783 | $s .= JSON_PP_decode_surrogates($utf16, $u) || next;
|
---|
| 784 | $utf16 = undef;
|
---|
| 785 | }
|
---|
| 786 | else {
|
---|
| 787 | if (defined $utf16) {
|
---|
| 788 | decode_error("surrogate pair expected");
|
---|
| 789 | }
|
---|
| 790 |
|
---|
| 791 | if ( ( my $hex = hex( $u ) ) > 127 ) {
|
---|
| 792 | $is_utf8 = 1;
|
---|
| 793 | $s .= JSON_PP_decode_unicode($u) || next;
|
---|
| 794 | }
|
---|
| 795 | else {
|
---|
| 796 | $s .= chr $hex;
|
---|
| 797 | }
|
---|
| 798 | }
|
---|
| 799 |
|
---|
| 800 | }
|
---|
| 801 | else{
|
---|
| 802 | unless ($loose) {
|
---|
| 803 | $at -= 2;
|
---|
| 804 | decode_error('illegal backslash escape sequence in string');
|
---|
| 805 | }
|
---|
| 806 | $s .= $ch;
|
---|
| 807 | }
|
---|
| 808 | }
|
---|
| 809 | else{
|
---|
| 810 |
|
---|
| 811 | if ( ord $ch > 127 ) {
|
---|
| 812 | if ( $utf8 ) {
|
---|
| 813 | unless( $ch = is_valid_utf8($ch) ) {
|
---|
| 814 | $at -= 1;
|
---|
| 815 | decode_error("malformed UTF-8 character in JSON string");
|
---|
| 816 | }
|
---|
| 817 | else {
|
---|
| 818 | $at += $utf8_len - 1;
|
---|
| 819 | }
|
---|
| 820 | }
|
---|
| 821 | else {
|
---|
| 822 | utf8::encode( $ch );
|
---|
| 823 | }
|
---|
| 824 |
|
---|
| 825 | $is_utf8 = 1;
|
---|
| 826 | }
|
---|
| 827 |
|
---|
| 828 | if (!$loose) {
|
---|
| 829 | if ($ch =~ /[\x00-\x1f\x22\x5c]/) { # '/' ok
|
---|
| 830 | $at--;
|
---|
| 831 | decode_error('invalid character encountered while parsing JSON string');
|
---|
| 832 | }
|
---|
| 833 | }
|
---|
| 834 |
|
---|
| 835 | $s .= $ch;
|
---|
| 836 | }
|
---|
| 837 | }
|
---|
| 838 | }
|
---|
| 839 |
|
---|
| 840 | decode_error("unexpected end of string while parsing JSON string");
|
---|
| 841 | }
|
---|
| 842 |
|
---|
| 843 |
|
---|
| 844 | sub white {
|
---|
| 845 | while( defined $ch ){
|
---|
| 846 | if($ch le ' '){
|
---|
| 847 | next_chr();
|
---|
| 848 | }
|
---|
| 849 | elsif($ch eq '/'){
|
---|
| 850 | next_chr();
|
---|
| 851 | if(defined $ch and $ch eq '/'){
|
---|
| 852 | 1 while(defined(next_chr()) and $ch ne "\n" and $ch ne "\r");
|
---|
| 853 | }
|
---|
| 854 | elsif(defined $ch and $ch eq '*'){
|
---|
| 855 | next_chr();
|
---|
| 856 | while(1){
|
---|
| 857 | if(defined $ch){
|
---|
| 858 | if($ch eq '*'){
|
---|
| 859 | if(defined(next_chr()) and $ch eq '/'){
|
---|
| 860 | next_chr();
|
---|
| 861 | last;
|
---|
| 862 | }
|
---|
| 863 | }
|
---|
| 864 | else{
|
---|
| 865 | next_chr();
|
---|
| 866 | }
|
---|
| 867 | }
|
---|
| 868 | else{
|
---|
| 869 | decode_error("Unterminated comment");
|
---|
| 870 | }
|
---|
| 871 | }
|
---|
| 872 | next;
|
---|
| 873 | }
|
---|
| 874 | else{
|
---|
| 875 | $at--;
|
---|
| 876 | decode_error("malformed JSON string, neither array, object, number, string or atom");
|
---|
| 877 | }
|
---|
| 878 | }
|
---|
| 879 | else{
|
---|
| 880 | if ($relaxed and $ch eq '#') { # correctly?
|
---|
| 881 | pos($text) = $at;
|
---|
| 882 | $text =~ /\G([^\n]*(?:\r\n|\r|\n|$))/g;
|
---|
| 883 | $at = pos($text);
|
---|
| 884 | next_chr;
|
---|
| 885 | next;
|
---|
| 886 | }
|
---|
| 887 |
|
---|
| 888 | last;
|
---|
| 889 | }
|
---|
| 890 | }
|
---|
| 891 | }
|
---|
| 892 |
|
---|
| 893 |
|
---|
| 894 | sub array {
|
---|
| 895 | my $a = [];
|
---|
| 896 |
|
---|
| 897 | decode_error('json text or perl structure exceeds maximum nesting level (max_depth set too low?)')
|
---|
| 898 | if (++$depth > $max_depth);
|
---|
| 899 |
|
---|
| 900 | next_chr();
|
---|
| 901 | white();
|
---|
| 902 |
|
---|
| 903 | if(defined $ch and $ch eq ']'){
|
---|
| 904 | --$depth;
|
---|
| 905 | next_chr();
|
---|
| 906 | return $a;
|
---|
| 907 | }
|
---|
| 908 | else {
|
---|
| 909 | while(defined($ch)){
|
---|
| 910 | push @$a, value();
|
---|
| 911 |
|
---|
| 912 | white();
|
---|
| 913 |
|
---|
| 914 | if (!defined $ch) {
|
---|
| 915 | last;
|
---|
| 916 | }
|
---|
| 917 |
|
---|
| 918 | if($ch eq ']'){
|
---|
| 919 | --$depth;
|
---|
| 920 | next_chr();
|
---|
| 921 | return $a;
|
---|
| 922 | }
|
---|
| 923 |
|
---|
| 924 | if($ch ne ','){
|
---|
| 925 | last;
|
---|
| 926 | }
|
---|
| 927 |
|
---|
| 928 | next_chr();
|
---|
| 929 | white();
|
---|
| 930 |
|
---|
| 931 | if ($relaxed and $ch eq ']') {
|
---|
| 932 | --$depth;
|
---|
| 933 | next_chr();
|
---|
| 934 | return $a;
|
---|
| 935 | }
|
---|
| 936 |
|
---|
| 937 | }
|
---|
| 938 | }
|
---|
| 939 |
|
---|
| 940 | decode_error(", or ] expected while parsing array");
|
---|
| 941 | }
|
---|
| 942 |
|
---|
| 943 |
|
---|
| 944 | sub object {
|
---|
| 945 | my $o = {};
|
---|
| 946 | my $k;
|
---|
| 947 |
|
---|
| 948 | decode_error('json text or perl structure exceeds maximum nesting level (max_depth set too low?)')
|
---|
| 949 | if (++$depth > $max_depth);
|
---|
| 950 | next_chr();
|
---|
| 951 | white();
|
---|
| 952 |
|
---|
| 953 | if(defined $ch and $ch eq '}'){
|
---|
| 954 | --$depth;
|
---|
| 955 | next_chr();
|
---|
| 956 | if ($F_HOOK) {
|
---|
| 957 | return _json_object_hook($o);
|
---|
| 958 | }
|
---|
| 959 | return $o;
|
---|
| 960 | }
|
---|
| 961 | else {
|
---|
| 962 | while (defined $ch) {
|
---|
| 963 | $k = ($allow_barekey and $ch ne '"' and $ch ne "'") ? bareKey() : string();
|
---|
| 964 | white();
|
---|
| 965 |
|
---|
| 966 | if(!defined $ch or $ch ne ':'){
|
---|
| 967 | $at--;
|
---|
| 968 | decode_error("':' expected");
|
---|
| 969 | }
|
---|
| 970 |
|
---|
| 971 | next_chr();
|
---|
| 972 | $o->{$k} = value();
|
---|
| 973 | white();
|
---|
| 974 |
|
---|
| 975 | last if (!defined $ch);
|
---|
| 976 |
|
---|
| 977 | if($ch eq '}'){
|
---|
| 978 | --$depth;
|
---|
| 979 | next_chr();
|
---|
| 980 | if ($F_HOOK) {
|
---|
| 981 | return _json_object_hook($o);
|
---|
| 982 | }
|
---|
| 983 | return $o;
|
---|
| 984 | }
|
---|
| 985 |
|
---|
| 986 | if($ch ne ','){
|
---|
| 987 | last;
|
---|
| 988 | }
|
---|
| 989 |
|
---|
| 990 | next_chr();
|
---|
| 991 | white();
|
---|
| 992 |
|
---|
| 993 | if ($relaxed and $ch eq '}') {
|
---|
| 994 | --$depth;
|
---|
| 995 | next_chr();
|
---|
| 996 | if ($F_HOOK) {
|
---|
| 997 | return _json_object_hook($o);
|
---|
| 998 | }
|
---|
| 999 | return $o;
|
---|
| 1000 | }
|
---|
| 1001 |
|
---|
| 1002 | }
|
---|
| 1003 |
|
---|
| 1004 | }
|
---|
| 1005 |
|
---|
| 1006 | $at--;
|
---|
| 1007 | decode_error(", or } expected while parsing object/hash");
|
---|
| 1008 | }
|
---|
| 1009 |
|
---|
| 1010 |
|
---|
| 1011 | sub bareKey { # doesn't strictly follow Standard ECMA-262 3rd Edition
|
---|
| 1012 | my $key;
|
---|
| 1013 | while($ch =~ /[^\x00-\x23\x25-\x2F\x3A-\x40\x5B-\x5E\x60\x7B-\x7F]/){
|
---|
| 1014 | $key .= $ch;
|
---|
| 1015 | next_chr();
|
---|
| 1016 | }
|
---|
| 1017 | return $key;
|
---|
| 1018 | }
|
---|
| 1019 |
|
---|
| 1020 |
|
---|
| 1021 | sub word {
|
---|
| 1022 | my $word = substr($text,$at-1,4);
|
---|
| 1023 |
|
---|
| 1024 | if($word eq 'true'){
|
---|
| 1025 | $at += 3;
|
---|
| 1026 | next_chr;
|
---|
| 1027 | return $JSON::PP::true;
|
---|
| 1028 | }
|
---|
| 1029 | elsif($word eq 'null'){
|
---|
| 1030 | $at += 3;
|
---|
| 1031 | next_chr;
|
---|
| 1032 | return undef;
|
---|
| 1033 | }
|
---|
| 1034 | elsif($word eq 'fals'){
|
---|
| 1035 | $at += 3;
|
---|
| 1036 | if(substr($text,$at,1) eq 'e'){
|
---|
| 1037 | $at++;
|
---|
| 1038 | next_chr;
|
---|
| 1039 | return $JSON::PP::false;
|
---|
| 1040 | }
|
---|
| 1041 | }
|
---|
| 1042 |
|
---|
| 1043 | $at--; # for decode_error report
|
---|
| 1044 |
|
---|
| 1045 | decode_error("'null' expected") if ($word =~ /^n/);
|
---|
| 1046 | decode_error("'true' expected") if ($word =~ /^t/);
|
---|
| 1047 | decode_error("'false' expected") if ($word =~ /^f/);
|
---|
| 1048 | decode_error("malformed JSON string, neither array, object, number, string or atom");
|
---|
| 1049 | }
|
---|
| 1050 |
|
---|
| 1051 |
|
---|
| 1052 | sub number {
|
---|
| 1053 | my $n = '';
|
---|
| 1054 | my $v;
|
---|
| 1055 |
|
---|
| 1056 | # According to RFC4627, hex or oct digts are invalid.
|
---|
| 1057 | if($ch eq '0'){
|
---|
| 1058 | my $peek = substr($text,$at,1);
|
---|
| 1059 | my $hex = $peek =~ /[xX]/; # 0 or 1
|
---|
| 1060 |
|
---|
| 1061 | if($hex){
|
---|
| 1062 | decode_error("malformed number (leading zero must not be followed by another digit)");
|
---|
| 1063 | ($n) = ( substr($text, $at+1) =~ /^([0-9a-fA-F]+)/);
|
---|
| 1064 | }
|
---|
| 1065 | else{ # oct
|
---|
| 1066 | ($n) = ( substr($text, $at) =~ /^([0-7]+)/);
|
---|
| 1067 | if (defined $n and length $n > 1) {
|
---|
| 1068 | decode_error("malformed number (leading zero must not be followed by another digit)");
|
---|
| 1069 | }
|
---|
| 1070 | }
|
---|
| 1071 |
|
---|
| 1072 | if(defined $n and length($n)){
|
---|
| 1073 | if (!$hex and length($n) == 1) {
|
---|
| 1074 | decode_error("malformed number (leading zero must not be followed by another digit)");
|
---|
| 1075 | }
|
---|
| 1076 | $at += length($n) + $hex;
|
---|
| 1077 | next_chr;
|
---|
| 1078 | return $hex ? hex($n) : oct($n);
|
---|
| 1079 | }
|
---|
| 1080 | }
|
---|
| 1081 |
|
---|
| 1082 | if($ch eq '-'){
|
---|
| 1083 | $n = '-';
|
---|
| 1084 | next_chr;
|
---|
| 1085 | if (!defined $ch or $ch !~ /\d/) {
|
---|
| 1086 | decode_error("malformed number (no digits after initial minus)");
|
---|
| 1087 | }
|
---|
| 1088 | }
|
---|
| 1089 |
|
---|
| 1090 | while(defined $ch and $ch =~ /\d/){
|
---|
| 1091 | $n .= $ch;
|
---|
| 1092 | next_chr;
|
---|
| 1093 | }
|
---|
| 1094 |
|
---|
| 1095 | if(defined $ch and $ch eq '.'){
|
---|
| 1096 | $n .= '.';
|
---|
| 1097 |
|
---|
| 1098 | next_chr;
|
---|
| 1099 | if (!defined $ch or $ch !~ /\d/) {
|
---|
| 1100 | decode_error("malformed number (no digits after decimal point)");
|
---|
| 1101 | }
|
---|
| 1102 | else {
|
---|
| 1103 | $n .= $ch;
|
---|
| 1104 | }
|
---|
| 1105 |
|
---|
| 1106 | while(defined(next_chr) and $ch =~ /\d/){
|
---|
| 1107 | $n .= $ch;
|
---|
| 1108 | }
|
---|
| 1109 | }
|
---|
| 1110 |
|
---|
| 1111 | if(defined $ch and ($ch eq 'e' or $ch eq 'E')){
|
---|
| 1112 | $n .= $ch;
|
---|
| 1113 | next_chr;
|
---|
| 1114 |
|
---|
| 1115 | if(defined($ch) and ($ch eq '+' or $ch eq '-')){
|
---|
| 1116 | $n .= $ch;
|
---|
| 1117 | next_chr;
|
---|
| 1118 | if (!defined $ch or $ch =~ /\D/) {
|
---|
| 1119 | decode_error("malformed number (no digits after exp sign)");
|
---|
| 1120 | }
|
---|
| 1121 | $n .= $ch;
|
---|
| 1122 | }
|
---|
| 1123 | elsif(defined($ch) and $ch =~ /\d/){
|
---|
| 1124 | $n .= $ch;
|
---|
| 1125 | }
|
---|
| 1126 | else {
|
---|
| 1127 | decode_error("malformed number (no digits after exp sign)");
|
---|
| 1128 | }
|
---|
| 1129 |
|
---|
| 1130 | while(defined(next_chr) and $ch =~ /\d/){
|
---|
| 1131 | $n .= $ch;
|
---|
| 1132 | }
|
---|
| 1133 |
|
---|
| 1134 | }
|
---|
| 1135 |
|
---|
| 1136 | $v .= $n;
|
---|
| 1137 |
|
---|
| 1138 | if ($v !~ /[.eE]/ and length $v > $max_intsize) {
|
---|
| 1139 | if ($allow_bigint) { # from Adam Sussman
|
---|
| 1140 | require Math::BigInt;
|
---|
| 1141 | return Math::BigInt->new($v);
|
---|
| 1142 | }
|
---|
| 1143 | else {
|
---|
| 1144 | return "$v";
|
---|
| 1145 | }
|
---|
| 1146 | }
|
---|
| 1147 | elsif ($allow_bigint) {
|
---|
| 1148 | require Math::BigFloat;
|
---|
| 1149 | return Math::BigFloat->new($v);
|
---|
| 1150 | }
|
---|
| 1151 |
|
---|
| 1152 | return 0+$v;
|
---|
| 1153 | }
|
---|
| 1154 |
|
---|
| 1155 |
|
---|
| 1156 | sub is_valid_utf8 {
|
---|
| 1157 |
|
---|
| 1158 | $utf8_len = $_[0] =~ /[\x00-\x7F]/ ? 1
|
---|
| 1159 | : $_[0] =~ /[\xC2-\xDF]/ ? 2
|
---|
| 1160 | : $_[0] =~ /[\xE0-\xEF]/ ? 3
|
---|
| 1161 | : $_[0] =~ /[\xF0-\xF4]/ ? 4
|
---|
| 1162 | : 0
|
---|
| 1163 | ;
|
---|
| 1164 |
|
---|
| 1165 | return unless $utf8_len;
|
---|
| 1166 |
|
---|
| 1167 | my $is_valid_utf8 = substr($text, $at - 1, $utf8_len);
|
---|
| 1168 |
|
---|
| 1169 | return ( $is_valid_utf8 =~ /^(?:
|
---|
| 1170 | [\x00-\x7F]
|
---|
| 1171 | |[\xC2-\xDF][\x80-\xBF]
|
---|
| 1172 | |[\xE0][\xA0-\xBF][\x80-\xBF]
|
---|
| 1173 | |[\xE1-\xEC][\x80-\xBF][\x80-\xBF]
|
---|
| 1174 | |[\xED][\x80-\x9F][\x80-\xBF]
|
---|
| 1175 | |[\xEE-\xEF][\x80-\xBF][\x80-\xBF]
|
---|
| 1176 | |[\xF0][\x90-\xBF][\x80-\xBF][\x80-\xBF]
|
---|
| 1177 | |[\xF1-\xF3][\x80-\xBF][\x80-\xBF][\x80-\xBF]
|
---|
| 1178 | |[\xF4][\x80-\x8F][\x80-\xBF][\x80-\xBF]
|
---|
| 1179 | )$/x ) ? $is_valid_utf8 : '';
|
---|
| 1180 | }
|
---|
| 1181 |
|
---|
| 1182 |
|
---|
| 1183 | sub decode_error {
|
---|
| 1184 | my $error = shift;
|
---|
| 1185 | my $no_rep = shift;
|
---|
| 1186 | my $str = defined $text ? substr($text, $at) : '';
|
---|
| 1187 | my $mess = '';
|
---|
| 1188 | my $type = $] >= 5.008 ? 'U*'
|
---|
| 1189 | : $] < 5.006 ? 'C*'
|
---|
| 1190 | : utf8::is_utf8( $str ) ? 'U*' # 5.6
|
---|
| 1191 | : 'C*'
|
---|
| 1192 | ;
|
---|
| 1193 |
|
---|
| 1194 | for my $c ( unpack( $type, $str ) ) { # emulate pv_uni_display() ?
|
---|
| 1195 | $mess .= $c == 0x07 ? '\a'
|
---|
| 1196 | : $c == 0x09 ? '\t'
|
---|
| 1197 | : $c == 0x0a ? '\n'
|
---|
| 1198 | : $c == 0x0d ? '\r'
|
---|
| 1199 | : $c == 0x0c ? '\f'
|
---|
| 1200 | : $c < 0x20 ? sprintf('\x{%x}', $c)
|
---|
| 1201 | : $c == 0x5c ? '\\\\'
|
---|
| 1202 | : $c < 0x80 ? chr($c)
|
---|
| 1203 | : sprintf('\x{%x}', $c)
|
---|
| 1204 | ;
|
---|
| 1205 | if ( length $mess >= 20 ) {
|
---|
| 1206 | $mess .= '...';
|
---|
| 1207 | last;
|
---|
| 1208 | }
|
---|
| 1209 | }
|
---|
| 1210 |
|
---|
| 1211 | unless ( length $mess ) {
|
---|
| 1212 | $mess = '(end of string)';
|
---|
| 1213 | }
|
---|
| 1214 |
|
---|
| 1215 | Carp::croak (
|
---|
| 1216 | $no_rep ? "$error" : "$error, at character offset $at (before \"$mess\")"
|
---|
| 1217 | );
|
---|
| 1218 |
|
---|
| 1219 | }
|
---|
| 1220 |
|
---|
| 1221 |
|
---|
| 1222 | sub _json_object_hook {
|
---|
| 1223 | my $o = $_[0];
|
---|
| 1224 | my @ks = keys %{$o};
|
---|
| 1225 |
|
---|
| 1226 | if ( $cb_sk_object and @ks == 1 and exists $cb_sk_object->{ $ks[0] } and ref $cb_sk_object->{ $ks[0] } ) {
|
---|
| 1227 | my @val = $cb_sk_object->{ $ks[0] }->( $o->{$ks[0]} );
|
---|
| 1228 | if (@val == 1) {
|
---|
| 1229 | return $val[0];
|
---|
| 1230 | }
|
---|
| 1231 | }
|
---|
| 1232 |
|
---|
| 1233 | my @val = $cb_object->($o) if ($cb_object);
|
---|
| 1234 | if (@val == 0 or @val > 1) {
|
---|
| 1235 | return $o;
|
---|
| 1236 | }
|
---|
| 1237 | else {
|
---|
| 1238 | return $val[0];
|
---|
| 1239 | }
|
---|
| 1240 | }
|
---|
| 1241 |
|
---|
| 1242 |
|
---|
| 1243 | sub PP_decode_box {
|
---|
| 1244 | {
|
---|
| 1245 | text => $text,
|
---|
| 1246 | at => $at,
|
---|
| 1247 | ch => $ch,
|
---|
| 1248 | len => $len,
|
---|
| 1249 | depth => $depth,
|
---|
| 1250 | encoding => $encoding,
|
---|
| 1251 | is_valid_utf8 => $is_valid_utf8,
|
---|
| 1252 | };
|
---|
| 1253 | }
|
---|
| 1254 |
|
---|
| 1255 | } # PARSE
|
---|
| 1256 |
|
---|
| 1257 |
|
---|
| 1258 | sub _decode_surrogates { # from perlunicode
|
---|
| 1259 | my $uni = 0x10000 + (hex($_[0]) - 0xD800) * 0x400 + (hex($_[1]) - 0xDC00);
|
---|
| 1260 | my $un = pack('U*', $uni);
|
---|
| 1261 | utf8::encode( $un );
|
---|
| 1262 | return $un;
|
---|
| 1263 | }
|
---|
| 1264 |
|
---|
| 1265 |
|
---|
| 1266 | sub _decode_unicode {
|
---|
| 1267 | my $un = pack('U', hex shift);
|
---|
| 1268 | utf8::encode( $un );
|
---|
| 1269 | return $un;
|
---|
| 1270 | }
|
---|
| 1271 |
|
---|
| 1272 |
|
---|
| 1273 |
|
---|
| 1274 |
|
---|
| 1275 |
|
---|
| 1276 | ###############################
|
---|
| 1277 | # Utilities
|
---|
| 1278 | #
|
---|
| 1279 |
|
---|
| 1280 | BEGIN {
|
---|
| 1281 | eval 'require Scalar::Util';
|
---|
| 1282 | unless($@){
|
---|
| 1283 | *JSON::PP::blessed = \&Scalar::Util::blessed;
|
---|
| 1284 | *JSON::PP::reftype = \&Scalar::Util::reftype;
|
---|
| 1285 | }
|
---|
| 1286 | else{ # This code is from Sclar::Util.
|
---|
| 1287 | # warn $@;
|
---|
| 1288 | eval 'sub UNIVERSAL::a_sub_not_likely_to_be_here { ref($_[0]) }';
|
---|
| 1289 | *JSON::PP::blessed = sub {
|
---|
| 1290 | local($@, $SIG{__DIE__}, $SIG{__WARN__});
|
---|
| 1291 | ref($_[0]) ? eval { $_[0]->a_sub_not_likely_to_be_here } : undef;
|
---|
| 1292 | };
|
---|
| 1293 | my %tmap = qw(
|
---|
| 1294 | B::NULL SCALAR
|
---|
| 1295 | B::HV HASH
|
---|
| 1296 | B::AV ARRAY
|
---|
| 1297 | B::CV CODE
|
---|
| 1298 | B::IO IO
|
---|
| 1299 | B::GV GLOB
|
---|
| 1300 | B::REGEXP REGEXP
|
---|
| 1301 | );
|
---|
| 1302 | *JSON::PP::reftype = sub {
|
---|
| 1303 | my $r = shift;
|
---|
| 1304 |
|
---|
| 1305 | return undef unless length(ref($r));
|
---|
| 1306 |
|
---|
| 1307 | my $t = ref(B::svref_2object($r));
|
---|
| 1308 |
|
---|
| 1309 | return
|
---|
| 1310 | exists $tmap{$t} ? $tmap{$t}
|
---|
| 1311 | : length(ref($$r)) ? 'REF'
|
---|
| 1312 | : 'SCALAR';
|
---|
| 1313 | };
|
---|
| 1314 | }
|
---|
| 1315 | }
|
---|
| 1316 |
|
---|
| 1317 |
|
---|
| 1318 | # shamely copied and modified from JSON::XS code.
|
---|
| 1319 |
|
---|
| 1320 | $JSON::PP::true = do { bless \(my $dummy = 1), "JSON::PP::Boolean" };
|
---|
| 1321 | $JSON::PP::false = do { bless \(my $dummy = 0), "JSON::PP::Boolean" };
|
---|
| 1322 |
|
---|
| 1323 | sub is_bool { defined $_[0] and UNIVERSAL::isa($_[0], "JSON::PP::Boolean"); }
|
---|
| 1324 |
|
---|
| 1325 | sub true { $JSON::PP::true }
|
---|
| 1326 | sub false { $JSON::PP::false }
|
---|
| 1327 | sub null { undef; }
|
---|
| 1328 |
|
---|
| 1329 | ###############################
|
---|
| 1330 |
|
---|
| 1331 | package JSON::PP::Boolean;
|
---|
| 1332 |
|
---|
| 1333 |
|
---|
| 1334 | use overload (
|
---|
| 1335 | "0+" => sub { ${$_[0]} },
|
---|
| 1336 | "++" => sub { $_[0] = ${$_[0]} + 1 },
|
---|
| 1337 | "--" => sub { $_[0] = ${$_[0]} - 1 },
|
---|
| 1338 | fallback => 1,
|
---|
| 1339 | );
|
---|
| 1340 |
|
---|
| 1341 |
|
---|
| 1342 | ###############################
|
---|
| 1343 |
|
---|
| 1344 | package JSON::PP::IncrParser;
|
---|
| 1345 |
|
---|
| 1346 | use strict;
|
---|
| 1347 |
|
---|
| 1348 | use constant INCR_M_WS => 0; # initial whitespace skipping
|
---|
| 1349 | use constant INCR_M_STR => 1; # inside string
|
---|
| 1350 | use constant INCR_M_BS => 2; # inside backslash
|
---|
| 1351 | use constant INCR_M_JSON => 3; # outside anything, count nesting
|
---|
| 1352 | use constant INCR_M_C0 => 4;
|
---|
| 1353 | use constant INCR_M_C1 => 5;
|
---|
| 1354 |
|
---|
| 1355 | $JSON::PP::IncrParser::VERSION = '1.01';
|
---|
| 1356 |
|
---|
| 1357 | my $unpack_format = $] < 5.006 ? 'C*' : 'U*';
|
---|
| 1358 |
|
---|
| 1359 | sub new {
|
---|
| 1360 | my ( $class ) = @_;
|
---|
| 1361 |
|
---|
| 1362 | bless {
|
---|
| 1363 | incr_nest => 0,
|
---|
| 1364 | incr_text => undef,
|
---|
| 1365 | incr_parsing => 0,
|
---|
| 1366 | incr_p => 0,
|
---|
| 1367 | }, $class;
|
---|
| 1368 | }
|
---|
| 1369 |
|
---|
| 1370 |
|
---|
| 1371 | sub incr_parse {
|
---|
| 1372 | my ( $self, $coder, $text ) = @_;
|
---|
| 1373 |
|
---|
| 1374 | $self->{incr_text} = '' unless ( defined $self->{incr_text} );
|
---|
| 1375 |
|
---|
| 1376 | if ( defined $text ) {
|
---|
| 1377 | if ( utf8::is_utf8( $text ) and !utf8::is_utf8( $self->{incr_text} ) ) {
|
---|
| 1378 | utf8::upgrade( $self->{incr_text} ) ;
|
---|
| 1379 | utf8::decode( $self->{incr_text} ) ;
|
---|
| 1380 | }
|
---|
| 1381 | $self->{incr_text} .= $text;
|
---|
| 1382 | }
|
---|
| 1383 |
|
---|
| 1384 |
|
---|
| 1385 | my $max_size = $coder->get_max_size;
|
---|
| 1386 |
|
---|
| 1387 | if ( defined wantarray ) {
|
---|
| 1388 |
|
---|
| 1389 | $self->{incr_mode} = INCR_M_WS;
|
---|
| 1390 |
|
---|
| 1391 | if ( wantarray ) {
|
---|
| 1392 | my @ret;
|
---|
| 1393 |
|
---|
| 1394 | $self->{incr_parsing} = 1;
|
---|
| 1395 |
|
---|
| 1396 | do {
|
---|
| 1397 | push @ret, $self->_incr_parse( $coder, $self->{incr_text} );
|
---|
| 1398 |
|
---|
| 1399 | unless ( !$self->{incr_nest} and $self->{incr_mode} == INCR_M_JSON ) {
|
---|
| 1400 | $self->{incr_mode} = INCR_M_WS;
|
---|
| 1401 | }
|
---|
| 1402 |
|
---|
| 1403 | } until ( !$self->{incr_text} );
|
---|
| 1404 |
|
---|
| 1405 | $self->{incr_parsing} = 0;
|
---|
| 1406 |
|
---|
| 1407 | return @ret;
|
---|
| 1408 | }
|
---|
| 1409 | else { # in scalar context
|
---|
| 1410 | $self->{incr_parsing} = 1;
|
---|
| 1411 | my $obj = $self->_incr_parse( $coder, $self->{incr_text} );
|
---|
| 1412 | $self->{incr_parsing} = 0 if defined $obj; # pointed by Martin J. Evans
|
---|
| 1413 | return $obj ? $obj : undef; # $obj is an empty string, parsing was completed.
|
---|
| 1414 | }
|
---|
| 1415 |
|
---|
| 1416 | }
|
---|
| 1417 |
|
---|
| 1418 | }
|
---|
| 1419 |
|
---|
| 1420 |
|
---|
| 1421 | sub _incr_parse {
|
---|
| 1422 | my ( $self, $coder, $text, $skip ) = @_;
|
---|
| 1423 | my $p = $self->{incr_p};
|
---|
| 1424 | my $restore = $p;
|
---|
| 1425 |
|
---|
| 1426 | my @obj;
|
---|
| 1427 | my $len = length $text;
|
---|
| 1428 |
|
---|
| 1429 | if ( $self->{incr_mode} == INCR_M_WS ) {
|
---|
| 1430 | while ( $len > $p ) {
|
---|
| 1431 | my $s = substr( $text, $p, 1 );
|
---|
| 1432 | $p++ and next if ( 0x20 >= unpack($unpack_format, $s) );
|
---|
| 1433 | $self->{incr_mode} = INCR_M_JSON;
|
---|
| 1434 | last;
|
---|
| 1435 | }
|
---|
| 1436 | }
|
---|
| 1437 |
|
---|
| 1438 | while ( $len > $p ) {
|
---|
| 1439 | my $s = substr( $text, $p++, 1 );
|
---|
| 1440 |
|
---|
| 1441 | if ( $s eq '"' ) {
|
---|
| 1442 | if ( $self->{incr_mode} != INCR_M_STR ) {
|
---|
| 1443 | $self->{incr_mode} = INCR_M_STR;
|
---|
| 1444 | }
|
---|
| 1445 | else {
|
---|
| 1446 | $self->{incr_mode} = INCR_M_JSON;
|
---|
| 1447 | unless ( $self->{incr_nest} ) {
|
---|
| 1448 | last;
|
---|
| 1449 | }
|
---|
| 1450 | }
|
---|
| 1451 | }
|
---|
| 1452 |
|
---|
| 1453 | if ( $self->{incr_mode} == INCR_M_JSON ) {
|
---|
| 1454 |
|
---|
| 1455 | if ( $s eq '[' or $s eq '{' ) {
|
---|
| 1456 | if ( ++$self->{incr_nest} > $coder->get_max_depth ) {
|
---|
| 1457 | Carp::croak('json text or perl structure exceeds maximum nesting level (max_depth set too low?)');
|
---|
| 1458 | }
|
---|
| 1459 | }
|
---|
| 1460 | elsif ( $s eq ']' or $s eq '}' ) {
|
---|
| 1461 | last if ( --$self->{incr_nest} <= 0 );
|
---|
| 1462 | }
|
---|
| 1463 | elsif ( $s eq '#' ) {
|
---|
| 1464 | while ( $len > $p ) {
|
---|
| 1465 | last if substr( $text, $p++, 1 ) eq "\n";
|
---|
| 1466 | }
|
---|
| 1467 | }
|
---|
| 1468 |
|
---|
| 1469 | }
|
---|
| 1470 |
|
---|
| 1471 | }
|
---|
| 1472 |
|
---|
| 1473 | $self->{incr_p} = $p;
|
---|
| 1474 |
|
---|
| 1475 | return if ( $self->{incr_mode} == INCR_M_JSON and $self->{incr_nest} > 0 );
|
---|
| 1476 |
|
---|
| 1477 | return '' unless ( length substr( $self->{incr_text}, 0, $p ) );
|
---|
| 1478 |
|
---|
| 1479 | local $Carp::CarpLevel = 2;
|
---|
| 1480 |
|
---|
| 1481 | $self->{incr_p} = $restore;
|
---|
| 1482 | $self->{incr_c} = $p;
|
---|
| 1483 |
|
---|
| 1484 | my ( $obj, $tail ) = $coder->PP_decode_json( substr( $self->{incr_text}, 0, $p ), 0x10000001 );
|
---|
| 1485 |
|
---|
| 1486 | $self->{incr_text} = substr( $self->{incr_text}, $p );
|
---|
| 1487 | $self->{incr_p} = 0;
|
---|
| 1488 |
|
---|
| 1489 | return $obj or '';
|
---|
| 1490 | }
|
---|
| 1491 |
|
---|
| 1492 |
|
---|
| 1493 | sub incr_text {
|
---|
| 1494 | if ( $_[0]->{incr_parsing} ) {
|
---|
| 1495 | Carp::croak("incr_text can not be called when the incremental parser already started parsing");
|
---|
| 1496 | }
|
---|
| 1497 | $_[0]->{incr_text};
|
---|
| 1498 | }
|
---|
| 1499 |
|
---|
| 1500 |
|
---|
| 1501 | sub incr_skip {
|
---|
| 1502 | my $self = shift;
|
---|
| 1503 | $self->{incr_text} = substr( $self->{incr_text}, $self->{incr_c} );
|
---|
| 1504 | $self->{incr_p} = 0;
|
---|
| 1505 | }
|
---|
| 1506 |
|
---|
| 1507 |
|
---|
| 1508 | sub incr_reset {
|
---|
| 1509 | my $self = shift;
|
---|
| 1510 | $self->{incr_text} = undef;
|
---|
| 1511 | $self->{incr_p} = 0;
|
---|
| 1512 | $self->{incr_mode} = 0;
|
---|
| 1513 | $self->{incr_nest} = 0;
|
---|
| 1514 | $self->{incr_parsing} = 0;
|
---|
| 1515 | }
|
---|
| 1516 |
|
---|
| 1517 | ###############################
|
---|
| 1518 |
|
---|
| 1519 |
|
---|
| 1520 | 1;
|
---|
| 1521 | __END__
|
---|
| 1522 | =pod
|
---|
| 1523 |
|
---|
| 1524 | =head1 NAME
|
---|
| 1525 |
|
---|
| 1526 | JSON::PP - JSON::XS compatible pure-Perl module.
|
---|
| 1527 |
|
---|
| 1528 | =head1 SYNOPSIS
|
---|
| 1529 |
|
---|
| 1530 | use JSON::PP;
|
---|
| 1531 |
|
---|
| 1532 | # exported functions, they croak on error
|
---|
| 1533 | # and expect/generate UTF-8
|
---|
| 1534 |
|
---|
| 1535 | $utf8_encoded_json_text = encode_json $perl_hash_or_arrayref;
|
---|
| 1536 | $perl_hash_or_arrayref = decode_json $utf8_encoded_json_text;
|
---|
| 1537 |
|
---|
| 1538 | # OO-interface
|
---|
| 1539 |
|
---|
| 1540 | $coder = JSON::PP->new->ascii->pretty->allow_nonref;
|
---|
| 1541 | $pretty_printed_unencoded = $coder->encode ($perl_scalar);
|
---|
| 1542 | $perl_scalar = $coder->decode ($unicode_json_text);
|
---|
| 1543 |
|
---|
| 1544 | # Note that JSON version 2.0 and above will automatically use
|
---|
| 1545 | # JSON::XS or JSON::PP, so you should be able to just:
|
---|
| 1546 |
|
---|
| 1547 | use JSON;
|
---|
| 1548 |
|
---|
| 1549 | =head1 DESCRIPTION
|
---|
| 1550 |
|
---|
| 1551 | This module is L<JSON::XS> compatible pure Perl module.
|
---|
| 1552 | (Perl 5.8 or later is recommended)
|
---|
| 1553 |
|
---|
| 1554 | JSON::XS is the fastest and most proper JSON module on CPAN.
|
---|
| 1555 | It is written by Marc Lehmann in C, so must be compiled and
|
---|
| 1556 | installed in the used environment.
|
---|
| 1557 |
|
---|
| 1558 | JSON::PP is a pure-Perl module and has compatibility to JSON::XS.
|
---|
| 1559 |
|
---|
| 1560 |
|
---|
| 1561 | =head2 FEATURES
|
---|
| 1562 |
|
---|
| 1563 | =over
|
---|
| 1564 |
|
---|
| 1565 | =item * correct unicode handling
|
---|
| 1566 |
|
---|
| 1567 | This module knows how to handle Unicode (depending on Perl version).
|
---|
| 1568 |
|
---|
| 1569 | See to L<JSON::XS/A FEW NOTES ON UNICODE AND PERL> and L<UNICODE HANDLING ON PERLS>.
|
---|
| 1570 |
|
---|
| 1571 |
|
---|
| 1572 | =item * round-trip integrity
|
---|
| 1573 |
|
---|
| 1574 | When you serialise a perl data structure using only data types supported
|
---|
| 1575 | by JSON and Perl, the deserialised data structure is identical on the Perl
|
---|
| 1576 | level. (e.g. the string "2.0" doesn't suddenly become "2" just because
|
---|
| 1577 | it looks like a number). There I<are> minor exceptions to this, read the
|
---|
| 1578 | MAPPING section below to learn about those.
|
---|
| 1579 |
|
---|
| 1580 |
|
---|
| 1581 | =item * strict checking of JSON correctness
|
---|
| 1582 |
|
---|
| 1583 | There is no guessing, no generating of illegal JSON texts by default,
|
---|
| 1584 | and only JSON is accepted as input by default (the latter is a security feature).
|
---|
| 1585 | But when some options are set, loose chcking features are available.
|
---|
| 1586 |
|
---|
| 1587 | =back
|
---|
| 1588 |
|
---|
| 1589 | =head1 FUNCTIONS
|
---|
| 1590 |
|
---|
| 1591 | Basically, check to L<JSON> or L<JSON::XS>.
|
---|
| 1592 |
|
---|
| 1593 | =head2 encode_json
|
---|
| 1594 |
|
---|
| 1595 | $json_text = encode_json $perl_scalar
|
---|
| 1596 |
|
---|
| 1597 | =head2 decode_json
|
---|
| 1598 |
|
---|
| 1599 | $perl_scalar = decode_json $json_text
|
---|
| 1600 |
|
---|
| 1601 | =head2 JSON::PP::true
|
---|
| 1602 |
|
---|
| 1603 | Returns JSON true value which is blessed object.
|
---|
| 1604 | It C<isa> JSON::PP::Boolean object.
|
---|
| 1605 |
|
---|
| 1606 | =head2 JSON::PP::false
|
---|
| 1607 |
|
---|
| 1608 | Returns JSON false value which is blessed object.
|
---|
| 1609 | It C<isa> JSON::PP::Boolean object.
|
---|
| 1610 |
|
---|
| 1611 | =head2 JSON::PP::null
|
---|
| 1612 |
|
---|
| 1613 | Returns C<undef>.
|
---|
| 1614 |
|
---|
| 1615 | =head1 METHODS
|
---|
| 1616 |
|
---|
| 1617 | Basically, check to L<JSON> or L<JSON::XS>.
|
---|
| 1618 |
|
---|
| 1619 | =head2 new
|
---|
| 1620 |
|
---|
| 1621 | $json = new JSON::PP
|
---|
| 1622 |
|
---|
| 1623 | Rturns a new JSON::PP object that can be used to de/encode JSON
|
---|
| 1624 | strings.
|
---|
| 1625 |
|
---|
| 1626 | =head2 ascii
|
---|
| 1627 |
|
---|
| 1628 | $json = $json->ascii([$enable])
|
---|
| 1629 |
|
---|
| 1630 | $enabled = $json->get_ascii
|
---|
| 1631 |
|
---|
| 1632 | If $enable is true (or missing), then the encode method will not generate characters outside
|
---|
| 1633 | the code range 0..127. Any Unicode characters outside that range will be escaped using either
|
---|
| 1634 | a single \uXXXX or a double \uHHHH\uLLLLL escape sequence, as per RFC4627.
|
---|
| 1635 | (See to L<JSON::XS/OBJECT-ORIENTED INTERFACE>).
|
---|
| 1636 |
|
---|
| 1637 | In Perl 5.005, there is no character having high value (more than 255).
|
---|
| 1638 | See to L<UNICODE HANDLING ON PERLS>.
|
---|
| 1639 |
|
---|
| 1640 | If $enable is false, then the encode method will not escape Unicode characters unless
|
---|
| 1641 | required by the JSON syntax or other flags. This results in a faster and more compact format.
|
---|
| 1642 |
|
---|
| 1643 | JSON::PP->new->ascii(1)->encode([chr 0x10401])
|
---|
| 1644 | => ["\ud801\udc01"]
|
---|
| 1645 |
|
---|
| 1646 | =head2 latin1
|
---|
| 1647 |
|
---|
| 1648 | $json = $json->latin1([$enable])
|
---|
| 1649 |
|
---|
| 1650 | $enabled = $json->get_latin1
|
---|
| 1651 |
|
---|
| 1652 | If $enable is true (or missing), then the encode method will encode the resulting JSON
|
---|
| 1653 | text as latin1 (or iso-8859-1), escaping any characters outside the code range 0..255.
|
---|
| 1654 |
|
---|
| 1655 | If $enable is false, then the encode method will not escape Unicode characters
|
---|
| 1656 | unless required by the JSON syntax or other flags.
|
---|
| 1657 |
|
---|
| 1658 | JSON::XS->new->latin1->encode (["\x{89}\x{abc}"]
|
---|
| 1659 | => ["\x{89}\\u0abc"] # (perl syntax, U+abc escaped, U+89 not)
|
---|
| 1660 |
|
---|
| 1661 | See to L<UNICODE HANDLING ON PERLS>.
|
---|
| 1662 |
|
---|
| 1663 | =head2 utf8
|
---|
| 1664 |
|
---|
| 1665 | $json = $json->utf8([$enable])
|
---|
| 1666 |
|
---|
| 1667 | $enabled = $json->get_utf8
|
---|
| 1668 |
|
---|
| 1669 | If $enable is true (or missing), then the encode method will encode the JSON result
|
---|
| 1670 | into UTF-8, as required by many protocols, while the decode method expects to be handled
|
---|
| 1671 | an UTF-8-encoded string. Please note that UTF-8-encoded strings do not contain any
|
---|
| 1672 | characters outside the range 0..255, they are thus useful for bytewise/binary I/O.
|
---|
| 1673 |
|
---|
| 1674 | (In Perl 5.005, any character outside the range 0..255 does not exist.
|
---|
| 1675 | See to L<UNICODE HANDLING ON PERLS>.)
|
---|
| 1676 |
|
---|
| 1677 | In future versions, enabling this option might enable autodetection of the UTF-16 and UTF-32
|
---|
| 1678 | encoding families, as described in RFC4627.
|
---|
| 1679 |
|
---|
| 1680 | If $enable is false, then the encode method will return the JSON string as a (non-encoded)
|
---|
| 1681 | Unicode string, while decode expects thus a Unicode string. Any decoding or encoding
|
---|
| 1682 | (e.g. to UTF-8 or UTF-16) needs to be done yourself, e.g. using the Encode module.
|
---|
| 1683 |
|
---|
| 1684 | Example, output UTF-16BE-encoded JSON:
|
---|
| 1685 |
|
---|
| 1686 | use Encode;
|
---|
| 1687 | $jsontext = encode "UTF-16BE", JSON::XS->new->encode ($object);
|
---|
| 1688 |
|
---|
| 1689 | Example, decode UTF-32LE-encoded JSON:
|
---|
| 1690 |
|
---|
| 1691 | use Encode;
|
---|
| 1692 | $object = JSON::XS->new->decode (decode "UTF-32LE", $jsontext);
|
---|
| 1693 |
|
---|
| 1694 |
|
---|
| 1695 | =head2 pretty
|
---|
| 1696 |
|
---|
| 1697 | $json = $json->pretty([$enable])
|
---|
| 1698 |
|
---|
| 1699 | This enables (or disables) all of the C<indent>, C<space_before> and
|
---|
| 1700 | C<space_after> flags in one call to generate the most readable
|
---|
| 1701 | (or most compact) form possible.
|
---|
| 1702 |
|
---|
| 1703 | =head2 indent
|
---|
| 1704 |
|
---|
| 1705 | $json = $json->indent([$enable])
|
---|
| 1706 |
|
---|
| 1707 | $enabled = $json->get_indent
|
---|
| 1708 |
|
---|
| 1709 | The default indent space length is three.
|
---|
| 1710 | You can use C<indent_length> to change the length.
|
---|
| 1711 |
|
---|
| 1712 | =head2 space_before
|
---|
| 1713 |
|
---|
| 1714 | $json = $json->space_before([$enable])
|
---|
| 1715 |
|
---|
| 1716 | $enabled = $json->get_space_before
|
---|
| 1717 |
|
---|
| 1718 | =head2 space_after
|
---|
| 1719 |
|
---|
| 1720 | $json = $json->space_after([$enable])
|
---|
| 1721 |
|
---|
| 1722 | $enabled = $json->get_space_after
|
---|
| 1723 |
|
---|
| 1724 | =head2 relaxed
|
---|
| 1725 |
|
---|
| 1726 | $json = $json->relaxed([$enable])
|
---|
| 1727 |
|
---|
| 1728 | $enabled = $json->get_relaxed
|
---|
| 1729 |
|
---|
| 1730 | =head2 canonical
|
---|
| 1731 |
|
---|
| 1732 | $json = $json->canonical([$enable])
|
---|
| 1733 |
|
---|
| 1734 | $enabled = $json->get_canonical
|
---|
| 1735 |
|
---|
| 1736 | If you want your own sorting routine, you can give a code referece
|
---|
| 1737 | or a subroutine name to C<sort_by>. See to C<JSON::PP OWN METHODS>.
|
---|
| 1738 |
|
---|
| 1739 | =head2 allow_nonref
|
---|
| 1740 |
|
---|
| 1741 | $json = $json->allow_nonref([$enable])
|
---|
| 1742 |
|
---|
| 1743 | $enabled = $json->get_allow_nonref
|
---|
| 1744 |
|
---|
| 1745 | =head2 allow_unknown
|
---|
| 1746 |
|
---|
| 1747 | $json = $json->allow_unknown ([$enable])
|
---|
| 1748 |
|
---|
| 1749 | $enabled = $json->get_allow_unknown
|
---|
| 1750 |
|
---|
| 1751 | =head2 allow_blessed
|
---|
| 1752 |
|
---|
| 1753 | $json = $json->allow_blessed([$enable])
|
---|
| 1754 |
|
---|
| 1755 | $enabled = $json->get_allow_blessed
|
---|
| 1756 |
|
---|
| 1757 | =head2 convert_blessed
|
---|
| 1758 |
|
---|
| 1759 | $json = $json->convert_blessed([$enable])
|
---|
| 1760 |
|
---|
| 1761 | $enabled = $json->get_convert_blessed
|
---|
| 1762 |
|
---|
| 1763 | =head2 filter_json_object
|
---|
| 1764 |
|
---|
| 1765 | $json = $json->filter_json_object([$coderef])
|
---|
| 1766 |
|
---|
| 1767 | =head2 filter_json_single_key_object
|
---|
| 1768 |
|
---|
| 1769 | $json = $json->filter_json_single_key_object($key [=> $coderef])
|
---|
| 1770 |
|
---|
| 1771 | =head2 shrink
|
---|
| 1772 |
|
---|
| 1773 | $json = $json->shrink([$enable])
|
---|
| 1774 |
|
---|
| 1775 | $enabled = $json->get_shrink
|
---|
| 1776 |
|
---|
| 1777 | In JSON::XS, this flag resizes strings generated by either
|
---|
| 1778 | C<encode> or C<decode> to their minimum size possible.
|
---|
| 1779 | It will also try to downgrade any strings to octet-form if possible.
|
---|
| 1780 |
|
---|
| 1781 | In JSON::PP, it is noop about resizing strings but tries
|
---|
| 1782 | C<utf8::downgrade> to the returned string by C<encode>.
|
---|
| 1783 | See to L<utf8>.
|
---|
| 1784 |
|
---|
| 1785 | See to L<JSON::XS/OBJECT-ORIENTED INTERFACE>
|
---|
| 1786 |
|
---|
| 1787 | =head2 max_depth
|
---|
| 1788 |
|
---|
| 1789 | $json = $json->max_depth([$maximum_nesting_depth])
|
---|
| 1790 |
|
---|
| 1791 | $max_depth = $json->get_max_depth
|
---|
| 1792 |
|
---|
| 1793 | Sets the maximum nesting level (default C<512>) accepted while encoding
|
---|
| 1794 | or decoding. If a higher nesting level is detected in JSON text or a Perl
|
---|
| 1795 | data structure, then the encoder and decoder will stop and croak at that
|
---|
| 1796 | point.
|
---|
| 1797 |
|
---|
| 1798 | Nesting level is defined by number of hash- or arrayrefs that the encoder
|
---|
| 1799 | needs to traverse to reach a given point or the number of C<{> or C<[>
|
---|
| 1800 | characters without their matching closing parenthesis crossed to reach a
|
---|
| 1801 | given character in a string.
|
---|
| 1802 |
|
---|
| 1803 | If no argument is given, the highest possible setting will be used, which
|
---|
| 1804 | is rarely useful.
|
---|
| 1805 |
|
---|
| 1806 | See L<JSON::XS/SSECURITY CONSIDERATIONS> for more info on why this is useful.
|
---|
| 1807 |
|
---|
| 1808 | When a large value (100 or more) was set and it de/encodes a deep nested object/text,
|
---|
| 1809 | it may raise a warning 'Deep recursion on subroutin' at the perl runtime phase.
|
---|
| 1810 |
|
---|
| 1811 | =head2 max_size
|
---|
| 1812 |
|
---|
| 1813 | $json = $json->max_size([$maximum_string_size])
|
---|
| 1814 |
|
---|
| 1815 | $max_size = $json->get_max_size
|
---|
| 1816 |
|
---|
| 1817 | Set the maximum length a JSON text may have (in bytes) where decoding is
|
---|
| 1818 | being attempted. The default is C<0>, meaning no limit. When C<decode>
|
---|
| 1819 | is called on a string that is longer then this many bytes, it will not
|
---|
| 1820 | attempt to decode the string but throw an exception. This setting has no
|
---|
| 1821 | effect on C<encode> (yet).
|
---|
| 1822 |
|
---|
| 1823 | If no argument is given, the limit check will be deactivated (same as when
|
---|
| 1824 | C<0> is specified).
|
---|
| 1825 |
|
---|
| 1826 | See L<JSON::XS/SSECURITY CONSIDERATIONS> for more info on why this is useful.
|
---|
| 1827 |
|
---|
| 1828 | =head2 encode
|
---|
| 1829 |
|
---|
| 1830 | $json_text = $json->encode($perl_scalar)
|
---|
| 1831 |
|
---|
| 1832 | =head2 decode
|
---|
| 1833 |
|
---|
| 1834 | $perl_scalar = $json->decode($json_text)
|
---|
| 1835 |
|
---|
| 1836 | =head2 decode_prefix
|
---|
| 1837 |
|
---|
| 1838 | ($perl_scalar, $characters) = $json->decode_prefix($json_text)
|
---|
| 1839 |
|
---|
| 1840 |
|
---|
| 1841 | =head1 INCREMENTAL PARSING
|
---|
| 1842 |
|
---|
| 1843 | Most of this section are copied and modified from L<JSON::XS/INCREMENTAL PARSING>.
|
---|
| 1844 |
|
---|
| 1845 | In some cases, there is the need for incremental parsing of JSON texts.
|
---|
| 1846 | This module does allow you to parse a JSON stream incrementally.
|
---|
| 1847 | It does so by accumulating text until it has a full JSON object, which
|
---|
| 1848 | it then can decode. This process is similar to using C<decode_prefix>
|
---|
| 1849 | to see if a full JSON object is available, but is much more efficient
|
---|
| 1850 | (and can be implemented with a minimum of method calls).
|
---|
| 1851 |
|
---|
| 1852 | This module will only attempt to parse the JSON text once it is sure it
|
---|
| 1853 | has enough text to get a decisive result, using a very simple but
|
---|
| 1854 | truly incremental parser. This means that it sometimes won't stop as
|
---|
| 1855 | early as the full parser, for example, it doesn't detect parenthese
|
---|
| 1856 | mismatches. The only thing it guarantees is that it starts decoding as
|
---|
| 1857 | soon as a syntactically valid JSON text has been seen. This means you need
|
---|
| 1858 | to set resource limits (e.g. C<max_size>) to ensure the parser will stop
|
---|
| 1859 | parsing in the presence if syntax errors.
|
---|
| 1860 |
|
---|
| 1861 | The following methods implement this incremental parser.
|
---|
| 1862 |
|
---|
| 1863 | =head2 incr_parse
|
---|
| 1864 |
|
---|
| 1865 | $json->incr_parse( [$string] ) # void context
|
---|
| 1866 |
|
---|
| 1867 | $obj_or_undef = $json->incr_parse( [$string] ) # scalar context
|
---|
| 1868 |
|
---|
| 1869 | @obj_or_empty = $json->incr_parse( [$string] ) # list context
|
---|
| 1870 |
|
---|
| 1871 | This is the central parsing function. It can both append new text and
|
---|
| 1872 | extract objects from the stream accumulated so far (both of these
|
---|
| 1873 | functions are optional).
|
---|
| 1874 |
|
---|
| 1875 | If C<$string> is given, then this string is appended to the already
|
---|
| 1876 | existing JSON fragment stored in the C<$json> object.
|
---|
| 1877 |
|
---|
| 1878 | After that, if the function is called in void context, it will simply
|
---|
| 1879 | return without doing anything further. This can be used to add more text
|
---|
| 1880 | in as many chunks as you want.
|
---|
| 1881 |
|
---|
| 1882 | If the method is called in scalar context, then it will try to extract
|
---|
| 1883 | exactly I<one> JSON object. If that is successful, it will return this
|
---|
| 1884 | object, otherwise it will return C<undef>. If there is a parse error,
|
---|
| 1885 | this method will croak just as C<decode> would do (one can then use
|
---|
| 1886 | C<incr_skip> to skip the errornous part). This is the most common way of
|
---|
| 1887 | using the method.
|
---|
| 1888 |
|
---|
| 1889 | And finally, in list context, it will try to extract as many objects
|
---|
| 1890 | from the stream as it can find and return them, or the empty list
|
---|
| 1891 | otherwise. For this to work, there must be no separators between the JSON
|
---|
| 1892 | objects or arrays, instead they must be concatenated back-to-back. If
|
---|
| 1893 | an error occurs, an exception will be raised as in the scalar context
|
---|
| 1894 | case. Note that in this case, any previously-parsed JSON texts will be
|
---|
| 1895 | lost.
|
---|
| 1896 |
|
---|
| 1897 | Example: Parse some JSON arrays/objects in a given string and return them.
|
---|
| 1898 |
|
---|
| 1899 | my @objs = JSON->new->incr_parse ("[5][7][1,2]");
|
---|
| 1900 |
|
---|
| 1901 | =head2 incr_text
|
---|
| 1902 |
|
---|
| 1903 | $lvalue_string = $json->incr_text
|
---|
| 1904 |
|
---|
| 1905 | This method returns the currently stored JSON fragment as an lvalue, that
|
---|
| 1906 | is, you can manipulate it. This I<only> works when a preceding call to
|
---|
| 1907 | C<incr_parse> in I<scalar context> successfully returned an object. Under
|
---|
| 1908 | all other circumstances you must not call this function (I mean it.
|
---|
| 1909 | although in simple tests it might actually work, it I<will> fail under
|
---|
| 1910 | real world conditions). As a special exception, you can also call this
|
---|
| 1911 | method before having parsed anything.
|
---|
| 1912 |
|
---|
| 1913 | This function is useful in two cases: a) finding the trailing text after a
|
---|
| 1914 | JSON object or b) parsing multiple JSON objects separated by non-JSON text
|
---|
| 1915 | (such as commas).
|
---|
| 1916 |
|
---|
| 1917 | $json->incr_text =~ s/\s*,\s*//;
|
---|
| 1918 |
|
---|
| 1919 | In Perl 5.005, C<lvalue> attribute is not available.
|
---|
| 1920 | You must write codes like the below:
|
---|
| 1921 |
|
---|
| 1922 | $string = $json->incr_text;
|
---|
| 1923 | $string =~ s/\s*,\s*//;
|
---|
| 1924 | $json->incr_text( $string );
|
---|
| 1925 |
|
---|
| 1926 | =head2 incr_skip
|
---|
| 1927 |
|
---|
| 1928 | $json->incr_skip
|
---|
| 1929 |
|
---|
| 1930 | This will reset the state of the incremental parser and will remove the
|
---|
| 1931 | parsed text from the input buffer. This is useful after C<incr_parse>
|
---|
| 1932 | died, in which case the input buffer and incremental parser state is left
|
---|
| 1933 | unchanged, to skip the text parsed so far and to reset the parse state.
|
---|
| 1934 |
|
---|
| 1935 | =head2 incr_reset
|
---|
| 1936 |
|
---|
| 1937 | $json->incr_reset
|
---|
| 1938 |
|
---|
| 1939 | This completely resets the incremental parser, that is, after this call,
|
---|
| 1940 | it will be as if the parser had never parsed anything.
|
---|
| 1941 |
|
---|
| 1942 | This is useful if you want ot repeatedly parse JSON objects and want to
|
---|
| 1943 | ignore any trailing data, which means you have to reset the parser after
|
---|
| 1944 | each successful decode.
|
---|
| 1945 |
|
---|
| 1946 | See to L<JSON::XS/INCREMENTAL PARSING> for examples.
|
---|
| 1947 |
|
---|
| 1948 |
|
---|
| 1949 | =head1 JSON::PP OWN METHODS
|
---|
| 1950 |
|
---|
| 1951 | =head2 allow_singlequote
|
---|
| 1952 |
|
---|
| 1953 | $json = $json->allow_singlequote([$enable])
|
---|
| 1954 |
|
---|
| 1955 | If C<$enable> is true (or missing), then C<decode> will accept
|
---|
| 1956 | JSON strings quoted by single quotations that are invalid JSON
|
---|
| 1957 | format.
|
---|
| 1958 |
|
---|
| 1959 | $json->allow_singlequote->decode({"foo":'bar'});
|
---|
| 1960 | $json->allow_singlequote->decode({'foo':"bar"});
|
---|
| 1961 | $json->allow_singlequote->decode({'foo':'bar'});
|
---|
| 1962 |
|
---|
| 1963 | As same as the C<relaxed> option, this option may be used to parse
|
---|
| 1964 | application-specific files written by humans.
|
---|
| 1965 |
|
---|
| 1966 |
|
---|
| 1967 | =head2 allow_barekey
|
---|
| 1968 |
|
---|
| 1969 | $json = $json->allow_barekey([$enable])
|
---|
| 1970 |
|
---|
| 1971 | If C<$enable> is true (or missing), then C<decode> will accept
|
---|
| 1972 | bare keys of JSON object that are invalid JSON format.
|
---|
| 1973 |
|
---|
| 1974 | As same as the C<relaxed> option, this option may be used to parse
|
---|
| 1975 | application-specific files written by humans.
|
---|
| 1976 |
|
---|
| 1977 | $json->allow_barekey->decode('{foo:"bar"}');
|
---|
| 1978 |
|
---|
| 1979 | =head2 allow_bignum
|
---|
| 1980 |
|
---|
| 1981 | $json = $json->allow_bignum([$enable])
|
---|
| 1982 |
|
---|
| 1983 | If C<$enable> is true (or missing), then C<decode> will convert
|
---|
| 1984 | the big integer Perl cannot handle as integer into a L<Math::BigInt>
|
---|
| 1985 | object and convert a floating number (any) into a L<Math::BigFloat>.
|
---|
| 1986 |
|
---|
| 1987 | On the contary, C<encode> converts C<Math::BigInt> objects and C<Math::BigFloat>
|
---|
| 1988 | objects into JSON numbers with C<allow_blessed> enable.
|
---|
| 1989 |
|
---|
| 1990 | $json->allow_nonref->allow_blessed->allow_bignum;
|
---|
| 1991 | $bigfloat = $json->decode('2.000000000000000000000000001');
|
---|
| 1992 | print $json->encode($bigfloat);
|
---|
| 1993 | # => 2.000000000000000000000000001
|
---|
| 1994 |
|
---|
| 1995 | See to L<JSON::XS/MAPPING> aboout the normal conversion of JSON number.
|
---|
| 1996 |
|
---|
| 1997 | =head2 loose
|
---|
| 1998 |
|
---|
| 1999 | $json = $json->loose([$enable])
|
---|
| 2000 |
|
---|
| 2001 | The unescaped [\x00-\x1f\x22\x2f\x5c] strings are invalid in JSON strings
|
---|
| 2002 | and the module doesn't allow to C<decode> to these (except for \x2f).
|
---|
| 2003 | If C<$enable> is true (or missing), then C<decode> will accept these
|
---|
| 2004 | unescaped strings.
|
---|
| 2005 |
|
---|
| 2006 | $json->loose->decode(qq|["abc
|
---|
| 2007 | def"]|);
|
---|
| 2008 |
|
---|
| 2009 | See L<JSON::XS/SSECURITY CONSIDERATIONS>.
|
---|
| 2010 |
|
---|
| 2011 | =head2 escape_slash
|
---|
| 2012 |
|
---|
| 2013 | $json = $json->escape_slash([$enable])
|
---|
| 2014 |
|
---|
| 2015 | According to JSON Grammar, I<slash> (U+002F) is escaped. But default
|
---|
| 2016 | JSON::PP (as same as JSON::XS) encodes strings without escaping slash.
|
---|
| 2017 |
|
---|
| 2018 | If C<$enable> is true (or missing), then C<encode> will escape slashes.
|
---|
| 2019 |
|
---|
| 2020 | =head2 (OBSOLETED)as_nonblessed
|
---|
| 2021 |
|
---|
| 2022 | $json = $json->as_nonblessed
|
---|
| 2023 |
|
---|
| 2024 | (OBSOLETED) If C<$enable> is true (or missing), then C<encode> will convert
|
---|
| 2025 | a blessed hash reference or a blessed array reference (contains
|
---|
| 2026 | other blessed references) into JSON members and arrays.
|
---|
| 2027 |
|
---|
| 2028 | This feature is effective only when C<allow_blessed> is enable.
|
---|
| 2029 |
|
---|
| 2030 | =head2 indent_length
|
---|
| 2031 |
|
---|
| 2032 | $json = $json->indent_length($length)
|
---|
| 2033 |
|
---|
| 2034 | JSON::XS indent space length is 3 and cannot be changed.
|
---|
| 2035 | JSON::PP set the indent space length with the given $length.
|
---|
| 2036 | The default is 3. The acceptable range is 0 to 15.
|
---|
| 2037 |
|
---|
| 2038 | =head2 sort_by
|
---|
| 2039 |
|
---|
| 2040 | $json = $json->sort_by($function_name)
|
---|
| 2041 | $json = $json->sort_by($subroutine_ref)
|
---|
| 2042 |
|
---|
| 2043 | If $function_name or $subroutine_ref are set, its sort routine are used
|
---|
| 2044 | in encoding JSON objects.
|
---|
| 2045 |
|
---|
| 2046 | $js = $pc->sort_by(sub { $JSON::PP::a cmp $JSON::PP::b })->encode($obj);
|
---|
| 2047 | # is($js, q|{"a":1,"b":2,"c":3,"d":4,"e":5,"f":6,"g":7,"h":8,"i":9}|);
|
---|
| 2048 |
|
---|
| 2049 | $js = $pc->sort_by('own_sort')->encode($obj);
|
---|
| 2050 | # is($js, q|{"a":1,"b":2,"c":3,"d":4,"e":5,"f":6,"g":7,"h":8,"i":9}|);
|
---|
| 2051 |
|
---|
| 2052 | sub JSON::PP::own_sort { $JSON::PP::a cmp $JSON::PP::b }
|
---|
| 2053 |
|
---|
| 2054 | As the sorting routine runs in the JSON::PP scope, the given
|
---|
| 2055 | subroutine name and the special variables C<$a>, C<$b> will begin
|
---|
| 2056 | 'JSON::PP::'.
|
---|
| 2057 |
|
---|
| 2058 | If $integer is set, then the effect is same as C<canonical> on.
|
---|
| 2059 |
|
---|
| 2060 | =head1 INTERNAL
|
---|
| 2061 |
|
---|
| 2062 | For developers.
|
---|
| 2063 |
|
---|
| 2064 | =over
|
---|
| 2065 |
|
---|
| 2066 | =item PP_encode_box
|
---|
| 2067 |
|
---|
| 2068 | Returns
|
---|
| 2069 |
|
---|
| 2070 | {
|
---|
| 2071 | depth => $depth,
|
---|
| 2072 | indent_count => $indent_count,
|
---|
| 2073 | }
|
---|
| 2074 |
|
---|
| 2075 |
|
---|
| 2076 | =item PP_decode_box
|
---|
| 2077 |
|
---|
| 2078 | Returns
|
---|
| 2079 |
|
---|
| 2080 | {
|
---|
| 2081 | text => $text,
|
---|
| 2082 | at => $at,
|
---|
| 2083 | ch => $ch,
|
---|
| 2084 | len => $len,
|
---|
| 2085 | depth => $depth,
|
---|
| 2086 | encoding => $encoding,
|
---|
| 2087 | is_valid_utf8 => $is_valid_utf8,
|
---|
| 2088 | };
|
---|
| 2089 |
|
---|
| 2090 | =back
|
---|
| 2091 |
|
---|
| 2092 | =head1 MAPPING
|
---|
| 2093 |
|
---|
| 2094 | See to L<JSON::XS/MAPPING>.
|
---|
| 2095 |
|
---|
| 2096 |
|
---|
| 2097 | =head1 UNICODE HANDLING ON PERLS
|
---|
| 2098 |
|
---|
| 2099 | If you do not know about Unicode on Perl well,
|
---|
| 2100 | please check L<JSON::XS/A FEW NOTES ON UNICODE AND PERL>.
|
---|
| 2101 |
|
---|
| 2102 | =head2 Perl 5.8 and later
|
---|
| 2103 |
|
---|
| 2104 | Perl can handle Unicode and the JSON::PP de/encode methods also work properly.
|
---|
| 2105 |
|
---|
| 2106 | $json->allow_nonref->encode(chr hex 3042);
|
---|
| 2107 | $json->allow_nonref->encode(chr hex 12345);
|
---|
| 2108 |
|
---|
| 2109 | Reuturns C<"\u3042"> and C<"\ud808\udf45"> respectively.
|
---|
| 2110 |
|
---|
| 2111 | $json->allow_nonref->decode('"\u3042"');
|
---|
| 2112 | $json->allow_nonref->decode('"\ud808\udf45"');
|
---|
| 2113 |
|
---|
| 2114 | Returns UTF-8 encoded strings with UTF8 flag, regarded as C<U+3042> and C<U+12345>.
|
---|
| 2115 |
|
---|
| 2116 | Note that the versions from Perl 5.8.0 to 5.8.2, Perl built-in C<join> was broken,
|
---|
| 2117 | so JSON::PP wraps the C<join> with a subroutine. Thus JSON::PP works slow in the versions.
|
---|
| 2118 |
|
---|
| 2119 |
|
---|
| 2120 | =head2 Perl 5.6
|
---|
| 2121 |
|
---|
| 2122 | Perl can handle Unicode and the JSON::PP de/encode methods also work.
|
---|
| 2123 |
|
---|
| 2124 | =head2 Perl 5.005
|
---|
| 2125 |
|
---|
| 2126 | Perl 5.005 is a byte sementics world -- all strings are sequences of bytes.
|
---|
| 2127 | That means the unicode handling is not available.
|
---|
| 2128 |
|
---|
| 2129 | In encoding,
|
---|
| 2130 |
|
---|
| 2131 | $json->allow_nonref->encode(chr hex 3042); # hex 3042 is 12354.
|
---|
| 2132 | $json->allow_nonref->encode(chr hex 12345); # hex 12345 is 74565.
|
---|
| 2133 |
|
---|
| 2134 | Returns C<B> and C<E>, as C<chr> takes a value more than 255, it treats
|
---|
| 2135 | as C<$value % 256>, so the above codes are equivalent to :
|
---|
| 2136 |
|
---|
| 2137 | $json->allow_nonref->encode(chr 66);
|
---|
| 2138 | $json->allow_nonref->encode(chr 69);
|
---|
| 2139 |
|
---|
| 2140 | In decoding,
|
---|
| 2141 |
|
---|
| 2142 | $json->decode('"\u00e3\u0081\u0082"');
|
---|
| 2143 |
|
---|
| 2144 | The returned is a byte sequence C<0xE3 0x81 0x82> for UTF-8 encoded
|
---|
| 2145 | japanese character (C<HIRAGANA LETTER A>).
|
---|
| 2146 | And if it is represented in Unicode code point, C<U+3042>.
|
---|
| 2147 |
|
---|
| 2148 | Next,
|
---|
| 2149 |
|
---|
| 2150 | $json->decode('"\u3042"');
|
---|
| 2151 |
|
---|
| 2152 | We ordinary expect the returned value is a Unicode character C<U+3042>.
|
---|
| 2153 | But here is 5.005 world. This is C<0xE3 0x81 0x82>.
|
---|
| 2154 |
|
---|
| 2155 | $json->decode('"\ud808\udf45"');
|
---|
| 2156 |
|
---|
| 2157 | This is not a character C<U+12345> but bytes - C<0xf0 0x92 0x8d 0x85>.
|
---|
| 2158 |
|
---|
| 2159 |
|
---|
| 2160 | =head1 TODO
|
---|
| 2161 |
|
---|
| 2162 | =over
|
---|
| 2163 |
|
---|
| 2164 | =item speed
|
---|
| 2165 |
|
---|
| 2166 | =item memory saving
|
---|
| 2167 |
|
---|
| 2168 | =back
|
---|
| 2169 |
|
---|
| 2170 |
|
---|
| 2171 | =head1 SEE ALSO
|
---|
| 2172 |
|
---|
| 2173 | Most of the document are copied and modified from JSON::XS doc.
|
---|
| 2174 |
|
---|
| 2175 | L<JSON::XS>
|
---|
| 2176 |
|
---|
| 2177 | RFC4627 (L<http://www.ietf.org/rfc/rfc4627.txt>)
|
---|
| 2178 |
|
---|
| 2179 | =head1 AUTHOR
|
---|
| 2180 |
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| 2181 | Makamaka Hannyaharamitu, E<lt>makamaka[at]cpan.orgE<gt>
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| 2182 |
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| 2183 |
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| 2184 | =head1 COPYRIGHT AND LICENSE
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| 2185 |
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| 2186 | Copyright 2007-2010 by Makamaka Hannyaharamitu
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| 2187 |
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| 2188 | This library is free software; you can redistribute it and/or modify
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| 2189 | it under the same terms as Perl itself.
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| 2190 |
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| 2191 | =cut
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