| Index: third_party/JSON/JSON-2.59/blib/lib/JSON/backportPP.pm
|
| diff --git a/third_party/JSON/JSON-2.59/blib/lib/JSON/backportPP.pm b/third_party/JSON/JSON-2.59/blib/lib/JSON/backportPP.pm
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..cdf0c76df1b9c2871f9c4321d97ed13ca624fc7a
|
| --- /dev/null
|
| +++ b/third_party/JSON/JSON-2.59/blib/lib/JSON/backportPP.pm
|
| @@ -0,0 +1,2803 @@
|
| +package # This is JSON::backportPP
|
| + JSON::PP;
|
| +
|
| +# JSON-2.0
|
| +
|
| +use 5.005;
|
| +use strict;
|
| +use base qw(Exporter);
|
| +use overload ();
|
| +
|
| +use Carp ();
|
| +use B ();
|
| +#use Devel::Peek;
|
| +
|
| +use vars qw($VERSION);
|
| +$VERSION = '2.27202';
|
| +
|
| +@JSON::PP::EXPORT = qw(encode_json decode_json from_json to_json);
|
| +
|
| +# instead of hash-access, i tried index-access for speed.
|
| +# but this method is not faster than what i expected. so it will be changed.
|
| +
|
| +use constant P_ASCII => 0;
|
| +use constant P_LATIN1 => 1;
|
| +use constant P_UTF8 => 2;
|
| +use constant P_INDENT => 3;
|
| +use constant P_CANONICAL => 4;
|
| +use constant P_SPACE_BEFORE => 5;
|
| +use constant P_SPACE_AFTER => 6;
|
| +use constant P_ALLOW_NONREF => 7;
|
| +use constant P_SHRINK => 8;
|
| +use constant P_ALLOW_BLESSED => 9;
|
| +use constant P_CONVERT_BLESSED => 10;
|
| +use constant P_RELAXED => 11;
|
| +
|
| +use constant P_LOOSE => 12;
|
| +use constant P_ALLOW_BIGNUM => 13;
|
| +use constant P_ALLOW_BAREKEY => 14;
|
| +use constant P_ALLOW_SINGLEQUOTE => 15;
|
| +use constant P_ESCAPE_SLASH => 16;
|
| +use constant P_AS_NONBLESSED => 17;
|
| +
|
| +use constant P_ALLOW_UNKNOWN => 18;
|
| +
|
| +use constant OLD_PERL => $] < 5.008 ? 1 : 0;
|
| +
|
| +BEGIN {
|
| + my @xs_compati_bit_properties = qw(
|
| + latin1 ascii utf8 indent canonical space_before space_after allow_nonref shrink
|
| + allow_blessed convert_blessed relaxed allow_unknown
|
| + );
|
| + my @pp_bit_properties = qw(
|
| + allow_singlequote allow_bignum loose
|
| + allow_barekey escape_slash as_nonblessed
|
| + );
|
| +
|
| + # Perl version check, Unicode handling is enable?
|
| + # Helper module sets @JSON::PP::_properties.
|
| + if ($] < 5.008 ) {
|
| + my $helper = $] >= 5.006 ? 'JSON::backportPP::Compat5006' : 'JSON::backportPP::Compat5005';
|
| + eval qq| require $helper |;
|
| + if ($@) { Carp::croak $@; }
|
| + }
|
| +
|
| + for my $name (@xs_compati_bit_properties, @pp_bit_properties) {
|
| + my $flag_name = 'P_' . uc($name);
|
| +
|
| + eval qq/
|
| + sub $name {
|
| + my \$enable = defined \$_[1] ? \$_[1] : 1;
|
| +
|
| + if (\$enable) {
|
| + \$_[0]->{PROPS}->[$flag_name] = 1;
|
| + }
|
| + else {
|
| + \$_[0]->{PROPS}->[$flag_name] = 0;
|
| + }
|
| +
|
| + \$_[0];
|
| + }
|
| +
|
| + sub get_$name {
|
| + \$_[0]->{PROPS}->[$flag_name] ? 1 : '';
|
| + }
|
| + /;
|
| + }
|
| +
|
| +}
|
| +
|
| +
|
| +
|
| +# Functions
|
| +
|
| +my %encode_allow_method
|
| + = map {($_ => 1)} qw/utf8 pretty allow_nonref latin1 self_encode escape_slash
|
| + allow_blessed convert_blessed indent indent_length allow_bignum
|
| + as_nonblessed
|
| + /;
|
| +my %decode_allow_method
|
| + = map {($_ => 1)} qw/utf8 allow_nonref loose allow_singlequote allow_bignum
|
| + allow_barekey max_size relaxed/;
|
| +
|
| +
|
| +my $JSON; # cache
|
| +
|
| +sub encode_json ($) { # encode
|
| + ($JSON ||= __PACKAGE__->new->utf8)->encode(@_);
|
| +}
|
| +
|
| +
|
| +sub decode_json { # decode
|
| + ($JSON ||= __PACKAGE__->new->utf8)->decode(@_);
|
| +}
|
| +
|
| +# Obsoleted
|
| +
|
| +sub to_json($) {
|
| + Carp::croak ("JSON::PP::to_json has been renamed to encode_json.");
|
| +}
|
| +
|
| +
|
| +sub from_json($) {
|
| + Carp::croak ("JSON::PP::from_json has been renamed to decode_json.");
|
| +}
|
| +
|
| +
|
| +# Methods
|
| +
|
| +sub new {
|
| + my $class = shift;
|
| + my $self = {
|
| + max_depth => 512,
|
| + max_size => 0,
|
| + indent => 0,
|
| + FLAGS => 0,
|
| + fallback => sub { encode_error('Invalid value. JSON can only reference.') },
|
| + indent_length => 3,
|
| + };
|
| +
|
| + bless $self, $class;
|
| +}
|
| +
|
| +
|
| +sub encode {
|
| + return $_[0]->PP_encode_json($_[1]);
|
| +}
|
| +
|
| +
|
| +sub decode {
|
| + return $_[0]->PP_decode_json($_[1], 0x00000000);
|
| +}
|
| +
|
| +
|
| +sub decode_prefix {
|
| + return $_[0]->PP_decode_json($_[1], 0x00000001);
|
| +}
|
| +
|
| +
|
| +# accessor
|
| +
|
| +
|
| +# pretty printing
|
| +
|
| +sub pretty {
|
| + my ($self, $v) = @_;
|
| + my $enable = defined $v ? $v : 1;
|
| +
|
| + if ($enable) { # indent_length(3) for JSON::XS compatibility
|
| + $self->indent(1)->indent_length(3)->space_before(1)->space_after(1);
|
| + }
|
| + else {
|
| + $self->indent(0)->space_before(0)->space_after(0);
|
| + }
|
| +
|
| + $self;
|
| +}
|
| +
|
| +# etc
|
| +
|
| +sub max_depth {
|
| + my $max = defined $_[1] ? $_[1] : 0x80000000;
|
| + $_[0]->{max_depth} = $max;
|
| + $_[0];
|
| +}
|
| +
|
| +
|
| +sub get_max_depth { $_[0]->{max_depth}; }
|
| +
|
| +
|
| +sub max_size {
|
| + my $max = defined $_[1] ? $_[1] : 0;
|
| + $_[0]->{max_size} = $max;
|
| + $_[0];
|
| +}
|
| +
|
| +
|
| +sub get_max_size { $_[0]->{max_size}; }
|
| +
|
| +
|
| +sub filter_json_object {
|
| + $_[0]->{cb_object} = defined $_[1] ? $_[1] : 0;
|
| + $_[0]->{F_HOOK} = ($_[0]->{cb_object} or $_[0]->{cb_sk_object}) ? 1 : 0;
|
| + $_[0];
|
| +}
|
| +
|
| +sub filter_json_single_key_object {
|
| + if (@_ > 1) {
|
| + $_[0]->{cb_sk_object}->{$_[1]} = $_[2];
|
| + }
|
| + $_[0]->{F_HOOK} = ($_[0]->{cb_object} or $_[0]->{cb_sk_object}) ? 1 : 0;
|
| + $_[0];
|
| +}
|
| +
|
| +sub indent_length {
|
| + if (!defined $_[1] or $_[1] > 15 or $_[1] < 0) {
|
| + Carp::carp "The acceptable range of indent_length() is 0 to 15.";
|
| + }
|
| + else {
|
| + $_[0]->{indent_length} = $_[1];
|
| + }
|
| + $_[0];
|
| +}
|
| +
|
| +sub get_indent_length {
|
| + $_[0]->{indent_length};
|
| +}
|
| +
|
| +sub sort_by {
|
| + $_[0]->{sort_by} = defined $_[1] ? $_[1] : 1;
|
| + $_[0];
|
| +}
|
| +
|
| +sub allow_bigint {
|
| + Carp::carp("allow_bigint() is obsoleted. use allow_bignum() insted.");
|
| +}
|
| +
|
| +###############################
|
| +
|
| +###
|
| +### Perl => JSON
|
| +###
|
| +
|
| +
|
| +{ # Convert
|
| +
|
| + my $max_depth;
|
| + my $indent;
|
| + my $ascii;
|
| + my $latin1;
|
| + my $utf8;
|
| + my $space_before;
|
| + my $space_after;
|
| + my $canonical;
|
| + my $allow_blessed;
|
| + my $convert_blessed;
|
| +
|
| + my $indent_length;
|
| + my $escape_slash;
|
| + my $bignum;
|
| + my $as_nonblessed;
|
| +
|
| + my $depth;
|
| + my $indent_count;
|
| + my $keysort;
|
| +
|
| +
|
| + sub PP_encode_json {
|
| + my $self = shift;
|
| + my $obj = shift;
|
| +
|
| + $indent_count = 0;
|
| + $depth = 0;
|
| +
|
| + my $idx = $self->{PROPS};
|
| +
|
| + ($ascii, $latin1, $utf8, $indent, $canonical, $space_before, $space_after, $allow_blessed,
|
| + $convert_blessed, $escape_slash, $bignum, $as_nonblessed)
|
| + = @{$idx}[P_ASCII .. P_SPACE_AFTER, P_ALLOW_BLESSED, P_CONVERT_BLESSED,
|
| + P_ESCAPE_SLASH, P_ALLOW_BIGNUM, P_AS_NONBLESSED];
|
| +
|
| + ($max_depth, $indent_length) = @{$self}{qw/max_depth indent_length/};
|
| +
|
| + $keysort = $canonical ? sub { $a cmp $b } : undef;
|
| +
|
| + if ($self->{sort_by}) {
|
| + $keysort = ref($self->{sort_by}) eq 'CODE' ? $self->{sort_by}
|
| + : $self->{sort_by} =~ /\D+/ ? $self->{sort_by}
|
| + : sub { $a cmp $b };
|
| + }
|
| +
|
| + encode_error("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)")
|
| + if(!ref $obj and !$idx->[ P_ALLOW_NONREF ]);
|
| +
|
| + my $str = $self->object_to_json($obj);
|
| +
|
| + $str .= "\n" if ( $indent ); # JSON::XS 2.26 compatible
|
| +
|
| + unless ($ascii or $latin1 or $utf8) {
|
| + utf8::upgrade($str);
|
| + }
|
| +
|
| + if ($idx->[ P_SHRINK ]) {
|
| + utf8::downgrade($str, 1);
|
| + }
|
| +
|
| + return $str;
|
| + }
|
| +
|
| +
|
| + sub object_to_json {
|
| + my ($self, $obj) = @_;
|
| + my $type = ref($obj);
|
| +
|
| + if($type eq 'HASH'){
|
| + return $self->hash_to_json($obj);
|
| + }
|
| + elsif($type eq 'ARRAY'){
|
| + return $self->array_to_json($obj);
|
| + }
|
| + elsif ($type) { # blessed object?
|
| + if (blessed($obj)) {
|
| +
|
| + return $self->value_to_json($obj) if ( $obj->isa('JSON::PP::Boolean') );
|
| +
|
| + if ( $convert_blessed and $obj->can('TO_JSON') ) {
|
| + my $result = $obj->TO_JSON();
|
| + if ( defined $result and ref( $result ) ) {
|
| + if ( refaddr( $obj ) eq refaddr( $result ) ) {
|
| + encode_error( sprintf(
|
| + "%s::TO_JSON method returned same object as was passed instead of a new one",
|
| + ref $obj
|
| + ) );
|
| + }
|
| + }
|
| +
|
| + return $self->object_to_json( $result );
|
| + }
|
| +
|
| + return "$obj" if ( $bignum and _is_bignum($obj) );
|
| + return $self->blessed_to_json($obj) if ($allow_blessed and $as_nonblessed); # will be removed.
|
| +
|
| + encode_error( sprintf("encountered object '%s', but neither allow_blessed "
|
| + . "nor convert_blessed settings are enabled", $obj)
|
| + ) unless ($allow_blessed);
|
| +
|
| + return 'null';
|
| + }
|
| + else {
|
| + return $self->value_to_json($obj);
|
| + }
|
| + }
|
| + else{
|
| + return $self->value_to_json($obj);
|
| + }
|
| + }
|
| +
|
| +
|
| + sub hash_to_json {
|
| + my ($self, $obj) = @_;
|
| + my @res;
|
| +
|
| + encode_error("json text or perl structure exceeds maximum nesting level (max_depth set too low?)")
|
| + if (++$depth > $max_depth);
|
| +
|
| + my ($pre, $post) = $indent ? $self->_up_indent() : ('', '');
|
| + my $del = ($space_before ? ' ' : '') . ':' . ($space_after ? ' ' : '');
|
| +
|
| + for my $k ( _sort( $obj ) ) {
|
| + if ( OLD_PERL ) { utf8::decode($k) } # key for Perl 5.6 / be optimized
|
| + push @res, string_to_json( $self, $k )
|
| + . $del
|
| + . ( $self->object_to_json( $obj->{$k} ) || $self->value_to_json( $obj->{$k} ) );
|
| + }
|
| +
|
| + --$depth;
|
| + $self->_down_indent() if ($indent);
|
| +
|
| + return '{' . ( @res ? $pre : '' ) . ( @res ? join( ",$pre", @res ) . $post : '' ) . '}';
|
| + }
|
| +
|
| +
|
| + sub array_to_json {
|
| + my ($self, $obj) = @_;
|
| + my @res;
|
| +
|
| + encode_error("json text or perl structure exceeds maximum nesting level (max_depth set too low?)")
|
| + if (++$depth > $max_depth);
|
| +
|
| + my ($pre, $post) = $indent ? $self->_up_indent() : ('', '');
|
| +
|
| + for my $v (@$obj){
|
| + push @res, $self->object_to_json($v) || $self->value_to_json($v);
|
| + }
|
| +
|
| + --$depth;
|
| + $self->_down_indent() if ($indent);
|
| +
|
| + return '[' . ( @res ? $pre : '' ) . ( @res ? join( ",$pre", @res ) . $post : '' ) . ']';
|
| + }
|
| +
|
| +
|
| + sub value_to_json {
|
| + my ($self, $value) = @_;
|
| +
|
| + return 'null' if(!defined $value);
|
| +
|
| + my $b_obj = B::svref_2object(\$value); # for round trip problem
|
| + my $flags = $b_obj->FLAGS;
|
| +
|
| + return $value # as is
|
| + if $flags & ( B::SVp_IOK | B::SVp_NOK ) and !( $flags & B::SVp_POK ); # SvTYPE is IV or NV?
|
| +
|
| + my $type = ref($value);
|
| +
|
| + if(!$type){
|
| + return string_to_json($self, $value);
|
| + }
|
| + elsif( blessed($value) and $value->isa('JSON::PP::Boolean') ){
|
| + return $$value == 1 ? 'true' : 'false';
|
| + }
|
| + elsif ($type) {
|
| + if ((overload::StrVal($value) =~ /=(\w+)/)[0]) {
|
| + return $self->value_to_json("$value");
|
| + }
|
| +
|
| + if ($type eq 'SCALAR' and defined $$value) {
|
| + return $$value eq '1' ? 'true'
|
| + : $$value eq '0' ? 'false'
|
| + : $self->{PROPS}->[ P_ALLOW_UNKNOWN ] ? 'null'
|
| + : encode_error("cannot encode reference to scalar");
|
| + }
|
| +
|
| + if ( $self->{PROPS}->[ P_ALLOW_UNKNOWN ] ) {
|
| + return 'null';
|
| + }
|
| + else {
|
| + if ( $type eq 'SCALAR' or $type eq 'REF' ) {
|
| + encode_error("cannot encode reference to scalar");
|
| + }
|
| + else {
|
| + encode_error("encountered $value, but JSON can only represent references to arrays or hashes");
|
| + }
|
| + }
|
| +
|
| + }
|
| + else {
|
| + return $self->{fallback}->($value)
|
| + if ($self->{fallback} and ref($self->{fallback}) eq 'CODE');
|
| + return 'null';
|
| + }
|
| +
|
| + }
|
| +
|
| +
|
| + my %esc = (
|
| + "\n" => '\n',
|
| + "\r" => '\r',
|
| + "\t" => '\t',
|
| + "\f" => '\f',
|
| + "\b" => '\b',
|
| + "\"" => '\"',
|
| + "\\" => '\\\\',
|
| + "\'" => '\\\'',
|
| + );
|
| +
|
| +
|
| + sub string_to_json {
|
| + my ($self, $arg) = @_;
|
| +
|
| + $arg =~ s/([\x22\x5c\n\r\t\f\b])/$esc{$1}/g;
|
| + $arg =~ s/\//\\\//g if ($escape_slash);
|
| + $arg =~ s/([\x00-\x08\x0b\x0e-\x1f])/'\\u00' . unpack('H2', $1)/eg;
|
| +
|
| + if ($ascii) {
|
| + $arg = JSON_PP_encode_ascii($arg);
|
| + }
|
| +
|
| + if ($latin1) {
|
| + $arg = JSON_PP_encode_latin1($arg);
|
| + }
|
| +
|
| + if ($utf8) {
|
| + utf8::encode($arg);
|
| + }
|
| +
|
| + return '"' . $arg . '"';
|
| + }
|
| +
|
| +
|
| + sub blessed_to_json {
|
| + my $reftype = reftype($_[1]) || '';
|
| + if ($reftype eq 'HASH') {
|
| + return $_[0]->hash_to_json($_[1]);
|
| + }
|
| + elsif ($reftype eq 'ARRAY') {
|
| + return $_[0]->array_to_json($_[1]);
|
| + }
|
| + else {
|
| + return 'null';
|
| + }
|
| + }
|
| +
|
| +
|
| + sub encode_error {
|
| + my $error = shift;
|
| + Carp::croak "$error";
|
| + }
|
| +
|
| +
|
| + sub _sort {
|
| + defined $keysort ? (sort $keysort (keys %{$_[0]})) : keys %{$_[0]};
|
| + }
|
| +
|
| +
|
| + sub _up_indent {
|
| + my $self = shift;
|
| + my $space = ' ' x $indent_length;
|
| +
|
| + my ($pre,$post) = ('','');
|
| +
|
| + $post = "\n" . $space x $indent_count;
|
| +
|
| + $indent_count++;
|
| +
|
| + $pre = "\n" . $space x $indent_count;
|
| +
|
| + return ($pre,$post);
|
| + }
|
| +
|
| +
|
| + sub _down_indent { $indent_count--; }
|
| +
|
| +
|
| + sub PP_encode_box {
|
| + {
|
| + depth => $depth,
|
| + indent_count => $indent_count,
|
| + };
|
| + }
|
| +
|
| +} # Convert
|
| +
|
| +
|
| +sub _encode_ascii {
|
| + join('',
|
| + map {
|
| + $_ <= 127 ?
|
| + chr($_) :
|
| + $_ <= 65535 ?
|
| + sprintf('\u%04x', $_) : sprintf('\u%x\u%x', _encode_surrogates($_));
|
| + } unpack('U*', $_[0])
|
| + );
|
| +}
|
| +
|
| +
|
| +sub _encode_latin1 {
|
| + join('',
|
| + map {
|
| + $_ <= 255 ?
|
| + chr($_) :
|
| + $_ <= 65535 ?
|
| + sprintf('\u%04x', $_) : sprintf('\u%x\u%x', _encode_surrogates($_));
|
| + } unpack('U*', $_[0])
|
| + );
|
| +}
|
| +
|
| +
|
| +sub _encode_surrogates { # from perlunicode
|
| + my $uni = $_[0] - 0x10000;
|
| + return ($uni / 0x400 + 0xD800, $uni % 0x400 + 0xDC00);
|
| +}
|
| +
|
| +
|
| +sub _is_bignum {
|
| + $_[0]->isa('Math::BigInt') or $_[0]->isa('Math::BigFloat');
|
| +}
|
| +
|
| +
|
| +
|
| +#
|
| +# JSON => Perl
|
| +#
|
| +
|
| +my $max_intsize;
|
| +
|
| +BEGIN {
|
| + my $checkint = 1111;
|
| + for my $d (5..64) {
|
| + $checkint .= 1;
|
| + my $int = eval qq| $checkint |;
|
| + if ($int =~ /[eE]/) {
|
| + $max_intsize = $d - 1;
|
| + last;
|
| + }
|
| + }
|
| +}
|
| +
|
| +{ # PARSE
|
| +
|
| + my %escapes = ( # by Jeremy Muhlich <jmuhlich [at] bitflood.org>
|
| + b => "\x8",
|
| + t => "\x9",
|
| + n => "\xA",
|
| + f => "\xC",
|
| + r => "\xD",
|
| + '\\' => '\\',
|
| + '"' => '"',
|
| + '/' => '/',
|
| + );
|
| +
|
| + my $text; # json data
|
| + my $at; # offset
|
| + my $ch; # 1chracter
|
| + my $len; # text length (changed according to UTF8 or NON UTF8)
|
| + # INTERNAL
|
| + my $depth; # nest counter
|
| + my $encoding; # json text encoding
|
| + my $is_valid_utf8; # temp variable
|
| + my $utf8_len; # utf8 byte length
|
| + # FLAGS
|
| + my $utf8; # must be utf8
|
| + my $max_depth; # max nest number of objects and arrays
|
| + my $max_size;
|
| + my $relaxed;
|
| + my $cb_object;
|
| + my $cb_sk_object;
|
| +
|
| + my $F_HOOK;
|
| +
|
| + my $allow_bigint; # using Math::BigInt
|
| + my $singlequote; # loosely quoting
|
| + my $loose; #
|
| + my $allow_barekey; # bareKey
|
| +
|
| + # $opt flag
|
| + # 0x00000001 .... decode_prefix
|
| + # 0x10000000 .... incr_parse
|
| +
|
| + sub PP_decode_json {
|
| + my ($self, $opt); # $opt is an effective flag during this decode_json.
|
| +
|
| + ($self, $text, $opt) = @_;
|
| +
|
| + ($at, $ch, $depth) = (0, '', 0);
|
| +
|
| + if ( !defined $text or ref $text ) {
|
| + decode_error("malformed JSON string, neither array, object, number, string or atom");
|
| + }
|
| +
|
| + my $idx = $self->{PROPS};
|
| +
|
| + ($utf8, $relaxed, $loose, $allow_bigint, $allow_barekey, $singlequote)
|
| + = @{$idx}[P_UTF8, P_RELAXED, P_LOOSE .. P_ALLOW_SINGLEQUOTE];
|
| +
|
| + if ( $utf8 ) {
|
| + utf8::downgrade( $text, 1 ) or Carp::croak("Wide character in subroutine entry");
|
| + }
|
| + else {
|
| + utf8::upgrade( $text );
|
| + }
|
| +
|
| + $len = length $text;
|
| +
|
| + ($max_depth, $max_size, $cb_object, $cb_sk_object, $F_HOOK)
|
| + = @{$self}{qw/max_depth max_size cb_object cb_sk_object F_HOOK/};
|
| +
|
| + if ($max_size > 1) {
|
| + use bytes;
|
| + my $bytes = length $text;
|
| + decode_error(
|
| + sprintf("attempted decode of JSON text of %s bytes size, but max_size is set to %s"
|
| + , $bytes, $max_size), 1
|
| + ) if ($bytes > $max_size);
|
| + }
|
| +
|
| + # Currently no effect
|
| + # should use regexp
|
| + my @octets = unpack('C4', $text);
|
| + $encoding = ( $octets[0] and $octets[1]) ? 'UTF-8'
|
| + : (!$octets[0] and $octets[1]) ? 'UTF-16BE'
|
| + : (!$octets[0] and !$octets[1]) ? 'UTF-32BE'
|
| + : ( $octets[2] ) ? 'UTF-16LE'
|
| + : (!$octets[2] ) ? 'UTF-32LE'
|
| + : 'unknown';
|
| +
|
| + white(); # remove head white space
|
| +
|
| + my $valid_start = defined $ch; # Is there a first character for JSON structure?
|
| +
|
| + my $result = value();
|
| +
|
| + return undef if ( !$result && ( $opt & 0x10000000 ) ); # for incr_parse
|
| +
|
| + decode_error("malformed JSON string, neither array, object, number, string or atom") unless $valid_start;
|
| +
|
| + if ( !$idx->[ P_ALLOW_NONREF ] and !ref $result ) {
|
| + decode_error(
|
| + 'JSON text must be an object or array (but found number, string, true, false or null,'
|
| + . ' use allow_nonref to allow this)', 1);
|
| + }
|
| +
|
| + Carp::croak('something wrong.') if $len < $at; # we won't arrive here.
|
| +
|
| + my $consumed = defined $ch ? $at - 1 : $at; # consumed JSON text length
|
| +
|
| + white(); # remove tail white space
|
| +
|
| + if ( $ch ) {
|
| + return ( $result, $consumed ) if ($opt & 0x00000001); # all right if decode_prefix
|
| + decode_error("garbage after JSON object");
|
| + }
|
| +
|
| + ( $opt & 0x00000001 ) ? ( $result, $consumed ) : $result;
|
| + }
|
| +
|
| +
|
| + sub next_chr {
|
| + return $ch = undef if($at >= $len);
|
| + $ch = substr($text, $at++, 1);
|
| + }
|
| +
|
| +
|
| + sub value {
|
| + white();
|
| + return if(!defined $ch);
|
| + return object() if($ch eq '{');
|
| + return array() if($ch eq '[');
|
| + return string() if($ch eq '"' or ($singlequote and $ch eq "'"));
|
| + return number() if($ch =~ /[0-9]/ or $ch eq '-');
|
| + return word();
|
| + }
|
| +
|
| + sub string {
|
| + my ($i, $s, $t, $u);
|
| + my $utf16;
|
| + my $is_utf8;
|
| +
|
| + ($is_valid_utf8, $utf8_len) = ('', 0);
|
| +
|
| + $s = ''; # basically UTF8 flag on
|
| +
|
| + if($ch eq '"' or ($singlequote and $ch eq "'")){
|
| + my $boundChar = $ch;
|
| +
|
| + OUTER: while( defined(next_chr()) ){
|
| +
|
| + if($ch eq $boundChar){
|
| + next_chr();
|
| +
|
| + if ($utf16) {
|
| + decode_error("missing low surrogate character in surrogate pair");
|
| + }
|
| +
|
| + utf8::decode($s) if($is_utf8);
|
| +
|
| + return $s;
|
| + }
|
| + elsif($ch eq '\\'){
|
| + next_chr();
|
| + if(exists $escapes{$ch}){
|
| + $s .= $escapes{$ch};
|
| + }
|
| + elsif($ch eq 'u'){ # UNICODE handling
|
| + my $u = '';
|
| +
|
| + for(1..4){
|
| + $ch = next_chr();
|
| + last OUTER if($ch !~ /[0-9a-fA-F]/);
|
| + $u .= $ch;
|
| + }
|
| +
|
| + # U+D800 - U+DBFF
|
| + if ($u =~ /^[dD][89abAB][0-9a-fA-F]{2}/) { # UTF-16 high surrogate?
|
| + $utf16 = $u;
|
| + }
|
| + # U+DC00 - U+DFFF
|
| + elsif ($u =~ /^[dD][c-fC-F][0-9a-fA-F]{2}/) { # UTF-16 low surrogate?
|
| + unless (defined $utf16) {
|
| + decode_error("missing high surrogate character in surrogate pair");
|
| + }
|
| + $is_utf8 = 1;
|
| + $s .= JSON_PP_decode_surrogates($utf16, $u) || next;
|
| + $utf16 = undef;
|
| + }
|
| + else {
|
| + if (defined $utf16) {
|
| + decode_error("surrogate pair expected");
|
| + }
|
| +
|
| + if ( ( my $hex = hex( $u ) ) > 127 ) {
|
| + $is_utf8 = 1;
|
| + $s .= JSON_PP_decode_unicode($u) || next;
|
| + }
|
| + else {
|
| + $s .= chr $hex;
|
| + }
|
| + }
|
| +
|
| + }
|
| + else{
|
| + unless ($loose) {
|
| + $at -= 2;
|
| + decode_error('illegal backslash escape sequence in string');
|
| + }
|
| + $s .= $ch;
|
| + }
|
| + }
|
| + else{
|
| +
|
| + if ( ord $ch > 127 ) {
|
| + if ( $utf8 ) {
|
| + unless( $ch = is_valid_utf8($ch) ) {
|
| + $at -= 1;
|
| + decode_error("malformed UTF-8 character in JSON string");
|
| + }
|
| + else {
|
| + $at += $utf8_len - 1;
|
| + }
|
| + }
|
| + else {
|
| + utf8::encode( $ch );
|
| + }
|
| +
|
| + $is_utf8 = 1;
|
| + }
|
| +
|
| + if (!$loose) {
|
| + if ($ch =~ /[\x00-\x1f\x22\x5c]/) { # '/' ok
|
| + $at--;
|
| + decode_error('invalid character encountered while parsing JSON string');
|
| + }
|
| + }
|
| +
|
| + $s .= $ch;
|
| + }
|
| + }
|
| + }
|
| +
|
| + decode_error("unexpected end of string while parsing JSON string");
|
| + }
|
| +
|
| +
|
| + sub white {
|
| + while( defined $ch ){
|
| + if($ch le ' '){
|
| + next_chr();
|
| + }
|
| + elsif($ch eq '/'){
|
| + next_chr();
|
| + if(defined $ch and $ch eq '/'){
|
| + 1 while(defined(next_chr()) and $ch ne "\n" and $ch ne "\r");
|
| + }
|
| + elsif(defined $ch and $ch eq '*'){
|
| + next_chr();
|
| + while(1){
|
| + if(defined $ch){
|
| + if($ch eq '*'){
|
| + if(defined(next_chr()) and $ch eq '/'){
|
| + next_chr();
|
| + last;
|
| + }
|
| + }
|
| + else{
|
| + next_chr();
|
| + }
|
| + }
|
| + else{
|
| + decode_error("Unterminated comment");
|
| + }
|
| + }
|
| + next;
|
| + }
|
| + else{
|
| + $at--;
|
| + decode_error("malformed JSON string, neither array, object, number, string or atom");
|
| + }
|
| + }
|
| + else{
|
| + if ($relaxed and $ch eq '#') { # correctly?
|
| + pos($text) = $at;
|
| + $text =~ /\G([^\n]*(?:\r\n|\r|\n|$))/g;
|
| + $at = pos($text);
|
| + next_chr;
|
| + next;
|
| + }
|
| +
|
| + last;
|
| + }
|
| + }
|
| + }
|
| +
|
| +
|
| + sub array {
|
| + my $a = $_[0] || []; # you can use this code to use another array ref object.
|
| +
|
| + decode_error('json text or perl structure exceeds maximum nesting level (max_depth set too low?)')
|
| + if (++$depth > $max_depth);
|
| +
|
| + next_chr();
|
| + white();
|
| +
|
| + if(defined $ch and $ch eq ']'){
|
| + --$depth;
|
| + next_chr();
|
| + return $a;
|
| + }
|
| + else {
|
| + while(defined($ch)){
|
| + push @$a, value();
|
| +
|
| + white();
|
| +
|
| + if (!defined $ch) {
|
| + last;
|
| + }
|
| +
|
| + if($ch eq ']'){
|
| + --$depth;
|
| + next_chr();
|
| + return $a;
|
| + }
|
| +
|
| + if($ch ne ','){
|
| + last;
|
| + }
|
| +
|
| + next_chr();
|
| + white();
|
| +
|
| + if ($relaxed and $ch eq ']') {
|
| + --$depth;
|
| + next_chr();
|
| + return $a;
|
| + }
|
| +
|
| + }
|
| + }
|
| +
|
| + decode_error(", or ] expected while parsing array");
|
| + }
|
| +
|
| +
|
| + sub object {
|
| + my $o = $_[0] || {}; # you can use this code to use another hash ref object.
|
| + my $k;
|
| +
|
| + decode_error('json text or perl structure exceeds maximum nesting level (max_depth set too low?)')
|
| + if (++$depth > $max_depth);
|
| + next_chr();
|
| + white();
|
| +
|
| + if(defined $ch and $ch eq '}'){
|
| + --$depth;
|
| + next_chr();
|
| + if ($F_HOOK) {
|
| + return _json_object_hook($o);
|
| + }
|
| + return $o;
|
| + }
|
| + else {
|
| + while (defined $ch) {
|
| + $k = ($allow_barekey and $ch ne '"' and $ch ne "'") ? bareKey() : string();
|
| + white();
|
| +
|
| + if(!defined $ch or $ch ne ':'){
|
| + $at--;
|
| + decode_error("':' expected");
|
| + }
|
| +
|
| + next_chr();
|
| + $o->{$k} = value();
|
| + white();
|
| +
|
| + last if (!defined $ch);
|
| +
|
| + if($ch eq '}'){
|
| + --$depth;
|
| + next_chr();
|
| + if ($F_HOOK) {
|
| + return _json_object_hook($o);
|
| + }
|
| + return $o;
|
| + }
|
| +
|
| + if($ch ne ','){
|
| + last;
|
| + }
|
| +
|
| + next_chr();
|
| + white();
|
| +
|
| + if ($relaxed and $ch eq '}') {
|
| + --$depth;
|
| + next_chr();
|
| + if ($F_HOOK) {
|
| + return _json_object_hook($o);
|
| + }
|
| + return $o;
|
| + }
|
| +
|
| + }
|
| +
|
| + }
|
| +
|
| + $at--;
|
| + decode_error(", or } expected while parsing object/hash");
|
| + }
|
| +
|
| +
|
| + sub bareKey { # doesn't strictly follow Standard ECMA-262 3rd Edition
|
| + my $key;
|
| + while($ch =~ /[^\x00-\x23\x25-\x2F\x3A-\x40\x5B-\x5E\x60\x7B-\x7F]/){
|
| + $key .= $ch;
|
| + next_chr();
|
| + }
|
| + return $key;
|
| + }
|
| +
|
| +
|
| + sub word {
|
| + my $word = substr($text,$at-1,4);
|
| +
|
| + if($word eq 'true'){
|
| + $at += 3;
|
| + next_chr;
|
| + return $JSON::PP::true;
|
| + }
|
| + elsif($word eq 'null'){
|
| + $at += 3;
|
| + next_chr;
|
| + return undef;
|
| + }
|
| + elsif($word eq 'fals'){
|
| + $at += 3;
|
| + if(substr($text,$at,1) eq 'e'){
|
| + $at++;
|
| + next_chr;
|
| + return $JSON::PP::false;
|
| + }
|
| + }
|
| +
|
| + $at--; # for decode_error report
|
| +
|
| + decode_error("'null' expected") if ($word =~ /^n/);
|
| + decode_error("'true' expected") if ($word =~ /^t/);
|
| + decode_error("'false' expected") if ($word =~ /^f/);
|
| + decode_error("malformed JSON string, neither array, object, number, string or atom");
|
| + }
|
| +
|
| +
|
| + sub number {
|
| + my $n = '';
|
| + my $v;
|
| +
|
| + # According to RFC4627, hex or oct digits are invalid.
|
| + if($ch eq '0'){
|
| + my $peek = substr($text,$at,1);
|
| + my $hex = $peek =~ /[xX]/; # 0 or 1
|
| +
|
| + if($hex){
|
| + decode_error("malformed number (leading zero must not be followed by another digit)");
|
| + ($n) = ( substr($text, $at+1) =~ /^([0-9a-fA-F]+)/);
|
| + }
|
| + else{ # oct
|
| + ($n) = ( substr($text, $at) =~ /^([0-7]+)/);
|
| + if (defined $n and length $n > 1) {
|
| + decode_error("malformed number (leading zero must not be followed by another digit)");
|
| + }
|
| + }
|
| +
|
| + if(defined $n and length($n)){
|
| + if (!$hex and length($n) == 1) {
|
| + decode_error("malformed number (leading zero must not be followed by another digit)");
|
| + }
|
| + $at += length($n) + $hex;
|
| + next_chr;
|
| + return $hex ? hex($n) : oct($n);
|
| + }
|
| + }
|
| +
|
| + if($ch eq '-'){
|
| + $n = '-';
|
| + next_chr;
|
| + if (!defined $ch or $ch !~ /\d/) {
|
| + decode_error("malformed number (no digits after initial minus)");
|
| + }
|
| + }
|
| +
|
| + while(defined $ch and $ch =~ /\d/){
|
| + $n .= $ch;
|
| + next_chr;
|
| + }
|
| +
|
| + if(defined $ch and $ch eq '.'){
|
| + $n .= '.';
|
| +
|
| + next_chr;
|
| + if (!defined $ch or $ch !~ /\d/) {
|
| + decode_error("malformed number (no digits after decimal point)");
|
| + }
|
| + else {
|
| + $n .= $ch;
|
| + }
|
| +
|
| + while(defined(next_chr) and $ch =~ /\d/){
|
| + $n .= $ch;
|
| + }
|
| + }
|
| +
|
| + if(defined $ch and ($ch eq 'e' or $ch eq 'E')){
|
| + $n .= $ch;
|
| + next_chr;
|
| +
|
| + if(defined($ch) and ($ch eq '+' or $ch eq '-')){
|
| + $n .= $ch;
|
| + next_chr;
|
| + if (!defined $ch or $ch =~ /\D/) {
|
| + decode_error("malformed number (no digits after exp sign)");
|
| + }
|
| + $n .= $ch;
|
| + }
|
| + elsif(defined($ch) and $ch =~ /\d/){
|
| + $n .= $ch;
|
| + }
|
| + else {
|
| + decode_error("malformed number (no digits after exp sign)");
|
| + }
|
| +
|
| + while(defined(next_chr) and $ch =~ /\d/){
|
| + $n .= $ch;
|
| + }
|
| +
|
| + }
|
| +
|
| + $v .= $n;
|
| +
|
| + if ($v !~ /[.eE]/ and length $v > $max_intsize) {
|
| + if ($allow_bigint) { # from Adam Sussman
|
| + require Math::BigInt;
|
| + return Math::BigInt->new($v);
|
| + }
|
| + else {
|
| + return "$v";
|
| + }
|
| + }
|
| + elsif ($allow_bigint) {
|
| + require Math::BigFloat;
|
| + return Math::BigFloat->new($v);
|
| + }
|
| +
|
| + return 0+$v;
|
| + }
|
| +
|
| +
|
| + sub is_valid_utf8 {
|
| +
|
| + $utf8_len = $_[0] =~ /[\x00-\x7F]/ ? 1
|
| + : $_[0] =~ /[\xC2-\xDF]/ ? 2
|
| + : $_[0] =~ /[\xE0-\xEF]/ ? 3
|
| + : $_[0] =~ /[\xF0-\xF4]/ ? 4
|
| + : 0
|
| + ;
|
| +
|
| + return unless $utf8_len;
|
| +
|
| + my $is_valid_utf8 = substr($text, $at - 1, $utf8_len);
|
| +
|
| + return ( $is_valid_utf8 =~ /^(?:
|
| + [\x00-\x7F]
|
| + |[\xC2-\xDF][\x80-\xBF]
|
| + |[\xE0][\xA0-\xBF][\x80-\xBF]
|
| + |[\xE1-\xEC][\x80-\xBF][\x80-\xBF]
|
| + |[\xED][\x80-\x9F][\x80-\xBF]
|
| + |[\xEE-\xEF][\x80-\xBF][\x80-\xBF]
|
| + |[\xF0][\x90-\xBF][\x80-\xBF][\x80-\xBF]
|
| + |[\xF1-\xF3][\x80-\xBF][\x80-\xBF][\x80-\xBF]
|
| + |[\xF4][\x80-\x8F][\x80-\xBF][\x80-\xBF]
|
| + )$/x ) ? $is_valid_utf8 : '';
|
| + }
|
| +
|
| +
|
| + sub decode_error {
|
| + my $error = shift;
|
| + my $no_rep = shift;
|
| + my $str = defined $text ? substr($text, $at) : '';
|
| + my $mess = '';
|
| + my $type = $] >= 5.008 ? 'U*'
|
| + : $] < 5.006 ? 'C*'
|
| + : utf8::is_utf8( $str ) ? 'U*' # 5.6
|
| + : 'C*'
|
| + ;
|
| +
|
| + for my $c ( unpack( $type, $str ) ) { # emulate pv_uni_display() ?
|
| + $mess .= $c == 0x07 ? '\a'
|
| + : $c == 0x09 ? '\t'
|
| + : $c == 0x0a ? '\n'
|
| + : $c == 0x0d ? '\r'
|
| + : $c == 0x0c ? '\f'
|
| + : $c < 0x20 ? sprintf('\x{%x}', $c)
|
| + : $c == 0x5c ? '\\\\'
|
| + : $c < 0x80 ? chr($c)
|
| + : sprintf('\x{%x}', $c)
|
| + ;
|
| + if ( length $mess >= 20 ) {
|
| + $mess .= '...';
|
| + last;
|
| + }
|
| + }
|
| +
|
| + unless ( length $mess ) {
|
| + $mess = '(end of string)';
|
| + }
|
| +
|
| + Carp::croak (
|
| + $no_rep ? "$error" : "$error, at character offset $at (before \"$mess\")"
|
| + );
|
| +
|
| + }
|
| +
|
| +
|
| + sub _json_object_hook {
|
| + my $o = $_[0];
|
| + my @ks = keys %{$o};
|
| +
|
| + if ( $cb_sk_object and @ks == 1 and exists $cb_sk_object->{ $ks[0] } and ref $cb_sk_object->{ $ks[0] } ) {
|
| + my @val = $cb_sk_object->{ $ks[0] }->( $o->{$ks[0]} );
|
| + if (@val == 1) {
|
| + return $val[0];
|
| + }
|
| + }
|
| +
|
| + my @val = $cb_object->($o) if ($cb_object);
|
| + if (@val == 0 or @val > 1) {
|
| + return $o;
|
| + }
|
| + else {
|
| + return $val[0];
|
| + }
|
| + }
|
| +
|
| +
|
| + sub PP_decode_box {
|
| + {
|
| + text => $text,
|
| + at => $at,
|
| + ch => $ch,
|
| + len => $len,
|
| + depth => $depth,
|
| + encoding => $encoding,
|
| + is_valid_utf8 => $is_valid_utf8,
|
| + };
|
| + }
|
| +
|
| +} # PARSE
|
| +
|
| +
|
| +sub _decode_surrogates { # from perlunicode
|
| + my $uni = 0x10000 + (hex($_[0]) - 0xD800) * 0x400 + (hex($_[1]) - 0xDC00);
|
| + my $un = pack('U*', $uni);
|
| + utf8::encode( $un );
|
| + return $un;
|
| +}
|
| +
|
| +
|
| +sub _decode_unicode {
|
| + my $un = pack('U', hex shift);
|
| + utf8::encode( $un );
|
| + return $un;
|
| +}
|
| +
|
| +#
|
| +# Setup for various Perl versions (the code from JSON::PP58)
|
| +#
|
| +
|
| +BEGIN {
|
| +
|
| + unless ( defined &utf8::is_utf8 ) {
|
| + require Encode;
|
| + *utf8::is_utf8 = *Encode::is_utf8;
|
| + }
|
| +
|
| + if ( $] >= 5.008 ) {
|
| + *JSON::PP::JSON_PP_encode_ascii = \&_encode_ascii;
|
| + *JSON::PP::JSON_PP_encode_latin1 = \&_encode_latin1;
|
| + *JSON::PP::JSON_PP_decode_surrogates = \&_decode_surrogates;
|
| + *JSON::PP::JSON_PP_decode_unicode = \&_decode_unicode;
|
| + }
|
| +
|
| + if ($] >= 5.008 and $] < 5.008003) { # join() in 5.8.0 - 5.8.2 is broken.
|
| + package # hide from PAUSE
|
| + JSON::PP;
|
| + require subs;
|
| + subs->import('join');
|
| + eval q|
|
| + sub join {
|
| + return '' if (@_ < 2);
|
| + my $j = shift;
|
| + my $str = shift;
|
| + for (@_) { $str .= $j . $_; }
|
| + return $str;
|
| + }
|
| + |;
|
| + }
|
| +
|
| +
|
| + sub JSON::PP::incr_parse {
|
| + local $Carp::CarpLevel = 1;
|
| + ( $_[0]->{_incr_parser} ||= JSON::PP::IncrParser->new )->incr_parse( @_ );
|
| + }
|
| +
|
| +
|
| + sub JSON::PP::incr_skip {
|
| + ( $_[0]->{_incr_parser} ||= JSON::PP::IncrParser->new )->incr_skip;
|
| + }
|
| +
|
| +
|
| + sub JSON::PP::incr_reset {
|
| + ( $_[0]->{_incr_parser} ||= JSON::PP::IncrParser->new )->incr_reset;
|
| + }
|
| +
|
| + eval q{
|
| + sub JSON::PP::incr_text : lvalue {
|
| + $_[0]->{_incr_parser} ||= JSON::PP::IncrParser->new;
|
| +
|
| + if ( $_[0]->{_incr_parser}->{incr_parsing} ) {
|
| + Carp::croak("incr_text can not be called when the incremental parser already started parsing");
|
| + }
|
| + $_[0]->{_incr_parser}->{incr_text};
|
| + }
|
| + } if ( $] >= 5.006 );
|
| +
|
| +} # Setup for various Perl versions (the code from JSON::PP58)
|
| +
|
| +
|
| +###############################
|
| +# Utilities
|
| +#
|
| +
|
| +BEGIN {
|
| + eval 'require Scalar::Util';
|
| + unless($@){
|
| + *JSON::PP::blessed = \&Scalar::Util::blessed;
|
| + *JSON::PP::reftype = \&Scalar::Util::reftype;
|
| + *JSON::PP::refaddr = \&Scalar::Util::refaddr;
|
| + }
|
| + else{ # This code is from Scalar::Util.
|
| + # warn $@;
|
| + eval 'sub UNIVERSAL::a_sub_not_likely_to_be_here { ref($_[0]) }';
|
| + *JSON::PP::blessed = sub {
|
| + local($@, $SIG{__DIE__}, $SIG{__WARN__});
|
| + ref($_[0]) ? eval { $_[0]->a_sub_not_likely_to_be_here } : undef;
|
| + };
|
| + my %tmap = qw(
|
| + B::NULL SCALAR
|
| + B::HV HASH
|
| + B::AV ARRAY
|
| + B::CV CODE
|
| + B::IO IO
|
| + B::GV GLOB
|
| + B::REGEXP REGEXP
|
| + );
|
| + *JSON::PP::reftype = sub {
|
| + my $r = shift;
|
| +
|
| + return undef unless length(ref($r));
|
| +
|
| + my $t = ref(B::svref_2object($r));
|
| +
|
| + return
|
| + exists $tmap{$t} ? $tmap{$t}
|
| + : length(ref($$r)) ? 'REF'
|
| + : 'SCALAR';
|
| + };
|
| + *JSON::PP::refaddr = sub {
|
| + return undef unless length(ref($_[0]));
|
| +
|
| + my $addr;
|
| + if(defined(my $pkg = blessed($_[0]))) {
|
| + $addr .= bless $_[0], 'Scalar::Util::Fake';
|
| + bless $_[0], $pkg;
|
| + }
|
| + else {
|
| + $addr .= $_[0]
|
| + }
|
| +
|
| + $addr =~ /0x(\w+)/;
|
| + local $^W;
|
| + #no warnings 'portable';
|
| + hex($1);
|
| + }
|
| + }
|
| +}
|
| +
|
| +
|
| +# shamelessly copied and modified from JSON::XS code.
|
| +
|
| +$JSON::PP::true = do { bless \(my $dummy = 1), "JSON::backportPP::Boolean" };
|
| +$JSON::PP::false = do { bless \(my $dummy = 0), "JSON::backportPP::Boolean" };
|
| +
|
| +sub is_bool { defined $_[0] and UNIVERSAL::isa($_[0], "JSON::PP::Boolean"); }
|
| +
|
| +sub true { $JSON::PP::true }
|
| +sub false { $JSON::PP::false }
|
| +sub null { undef; }
|
| +
|
| +###############################
|
| +
|
| +package JSON::backportPP::Boolean;
|
| +
|
| +@JSON::backportPP::Boolean::ISA = ('JSON::PP::Boolean');
|
| +use overload (
|
| + "0+" => sub { ${$_[0]} },
|
| + "++" => sub { $_[0] = ${$_[0]} + 1 },
|
| + "--" => sub { $_[0] = ${$_[0]} - 1 },
|
| + fallback => 1,
|
| +);
|
| +
|
| +
|
| +###############################
|
| +
|
| +package # hide from PAUSE
|
| + JSON::PP::IncrParser;
|
| +
|
| +use strict;
|
| +
|
| +use constant INCR_M_WS => 0; # initial whitespace skipping
|
| +use constant INCR_M_STR => 1; # inside string
|
| +use constant INCR_M_BS => 2; # inside backslash
|
| +use constant INCR_M_JSON => 3; # outside anything, count nesting
|
| +use constant INCR_M_C0 => 4;
|
| +use constant INCR_M_C1 => 5;
|
| +
|
| +use vars qw($VERSION);
|
| +$VERSION = '1.01';
|
| +
|
| +my $unpack_format = $] < 5.006 ? 'C*' : 'U*';
|
| +
|
| +sub new {
|
| + my ( $class ) = @_;
|
| +
|
| + bless {
|
| + incr_nest => 0,
|
| + incr_text => undef,
|
| + incr_parsing => 0,
|
| + incr_p => 0,
|
| + }, $class;
|
| +}
|
| +
|
| +
|
| +sub incr_parse {
|
| + my ( $self, $coder, $text ) = @_;
|
| +
|
| + $self->{incr_text} = '' unless ( defined $self->{incr_text} );
|
| +
|
| + if ( defined $text ) {
|
| + if ( utf8::is_utf8( $text ) and !utf8::is_utf8( $self->{incr_text} ) ) {
|
| + utf8::upgrade( $self->{incr_text} ) ;
|
| + utf8::decode( $self->{incr_text} ) ;
|
| + }
|
| + $self->{incr_text} .= $text;
|
| + }
|
| +
|
| +
|
| + my $max_size = $coder->get_max_size;
|
| +
|
| + if ( defined wantarray ) {
|
| +
|
| + $self->{incr_mode} = INCR_M_WS unless defined $self->{incr_mode};
|
| +
|
| + if ( wantarray ) {
|
| + my @ret;
|
| +
|
| + $self->{incr_parsing} = 1;
|
| +
|
| + do {
|
| + push @ret, $self->_incr_parse( $coder, $self->{incr_text} );
|
| +
|
| + unless ( !$self->{incr_nest} and $self->{incr_mode} == INCR_M_JSON ) {
|
| + $self->{incr_mode} = INCR_M_WS if $self->{incr_mode} != INCR_M_STR;
|
| + }
|
| +
|
| + } until ( length $self->{incr_text} >= $self->{incr_p} );
|
| +
|
| + $self->{incr_parsing} = 0;
|
| +
|
| + return @ret;
|
| + }
|
| + else { # in scalar context
|
| + $self->{incr_parsing} = 1;
|
| + my $obj = $self->_incr_parse( $coder, $self->{incr_text} );
|
| + $self->{incr_parsing} = 0 if defined $obj; # pointed by Martin J. Evans
|
| + return $obj ? $obj : undef; # $obj is an empty string, parsing was completed.
|
| + }
|
| +
|
| + }
|
| +
|
| +}
|
| +
|
| +
|
| +sub _incr_parse {
|
| + my ( $self, $coder, $text, $skip ) = @_;
|
| + my $p = $self->{incr_p};
|
| + my $restore = $p;
|
| +
|
| + my @obj;
|
| + my $len = length $text;
|
| +
|
| + if ( $self->{incr_mode} == INCR_M_WS ) {
|
| + while ( $len > $p ) {
|
| + my $s = substr( $text, $p, 1 );
|
| + $p++ and next if ( 0x20 >= unpack($unpack_format, $s) );
|
| + $self->{incr_mode} = INCR_M_JSON;
|
| + last;
|
| + }
|
| + }
|
| +
|
| + while ( $len > $p ) {
|
| + my $s = substr( $text, $p++, 1 );
|
| +
|
| + if ( $s eq '"' ) {
|
| + if (substr( $text, $p - 2, 1 ) eq '\\' ) {
|
| + next;
|
| + }
|
| +
|
| + if ( $self->{incr_mode} != INCR_M_STR ) {
|
| + $self->{incr_mode} = INCR_M_STR;
|
| + }
|
| + else {
|
| + $self->{incr_mode} = INCR_M_JSON;
|
| + unless ( $self->{incr_nest} ) {
|
| + last;
|
| + }
|
| + }
|
| + }
|
| +
|
| + if ( $self->{incr_mode} == INCR_M_JSON ) {
|
| +
|
| + if ( $s eq '[' or $s eq '{' ) {
|
| + if ( ++$self->{incr_nest} > $coder->get_max_depth ) {
|
| + Carp::croak('json text or perl structure exceeds maximum nesting level (max_depth set too low?)');
|
| + }
|
| + }
|
| + elsif ( $s eq ']' or $s eq '}' ) {
|
| + last if ( --$self->{incr_nest} <= 0 );
|
| + }
|
| + elsif ( $s eq '#' ) {
|
| + while ( $len > $p ) {
|
| + last if substr( $text, $p++, 1 ) eq "\n";
|
| + }
|
| + }
|
| +
|
| + }
|
| +
|
| + }
|
| +
|
| + $self->{incr_p} = $p;
|
| +
|
| + return if ( $self->{incr_mode} == INCR_M_STR and not $self->{incr_nest} );
|
| + return if ( $self->{incr_mode} == INCR_M_JSON and $self->{incr_nest} > 0 );
|
| +
|
| + return '' unless ( length substr( $self->{incr_text}, 0, $p ) );
|
| +
|
| + local $Carp::CarpLevel = 2;
|
| +
|
| + $self->{incr_p} = $restore;
|
| + $self->{incr_c} = $p;
|
| +
|
| + my ( $obj, $tail ) = $coder->PP_decode_json( substr( $self->{incr_text}, 0, $p ), 0x10000001 );
|
| +
|
| + $self->{incr_text} = substr( $self->{incr_text}, $p );
|
| + $self->{incr_p} = 0;
|
| +
|
| + return $obj or '';
|
| +}
|
| +
|
| +
|
| +sub incr_text {
|
| + if ( $_[0]->{incr_parsing} ) {
|
| + Carp::croak("incr_text can not be called when the incremental parser already started parsing");
|
| + }
|
| + $_[0]->{incr_text};
|
| +}
|
| +
|
| +
|
| +sub incr_skip {
|
| + my $self = shift;
|
| + $self->{incr_text} = substr( $self->{incr_text}, $self->{incr_c} );
|
| + $self->{incr_p} = 0;
|
| +}
|
| +
|
| +
|
| +sub incr_reset {
|
| + my $self = shift;
|
| + $self->{incr_text} = undef;
|
| + $self->{incr_p} = 0;
|
| + $self->{incr_mode} = 0;
|
| + $self->{incr_nest} = 0;
|
| + $self->{incr_parsing} = 0;
|
| +}
|
| +
|
| +###############################
|
| +
|
| +
|
| +1;
|
| +__END__
|
| +=pod
|
| +
|
| +=head1 NAME
|
| +
|
| +JSON::PP - JSON::XS compatible pure-Perl module.
|
| +
|
| +=head1 SYNOPSIS
|
| +
|
| + use JSON::PP;
|
| +
|
| + # exported functions, they croak on error
|
| + # and expect/generate UTF-8
|
| +
|
| + $utf8_encoded_json_text = encode_json $perl_hash_or_arrayref;
|
| + $perl_hash_or_arrayref = decode_json $utf8_encoded_json_text;
|
| +
|
| + # OO-interface
|
| +
|
| + $coder = JSON::PP->new->ascii->pretty->allow_nonref;
|
| +
|
| + $json_text = $json->encode( $perl_scalar );
|
| + $perl_scalar = $json->decode( $json_text );
|
| +
|
| + $pretty_printed = $json->pretty->encode( $perl_scalar ); # pretty-printing
|
| +
|
| + # Note that JSON version 2.0 and above will automatically use
|
| + # JSON::XS or JSON::PP, so you should be able to just:
|
| +
|
| + use JSON;
|
| +
|
| +
|
| +=head1 VERSION
|
| +
|
| + 2.27200
|
| +
|
| +L<JSON::XS> 2.27 (~2.30) compatible.
|
| +
|
| +=head1 DESCRIPTION
|
| +
|
| +This module is L<JSON::XS> compatible pure Perl module.
|
| +(Perl 5.8 or later is recommended)
|
| +
|
| +JSON::XS is the fastest and most proper JSON module on CPAN.
|
| +It is written by Marc Lehmann in C, so must be compiled and
|
| +installed in the used environment.
|
| +
|
| +JSON::PP is a pure-Perl module and has compatibility to JSON::XS.
|
| +
|
| +
|
| +=head2 FEATURES
|
| +
|
| +=over
|
| +
|
| +=item * correct unicode handling
|
| +
|
| +This module knows how to handle Unicode (depending on Perl version).
|
| +
|
| +See to L<JSON::XS/A FEW NOTES ON UNICODE AND PERL> and
|
| +L<UNICODE HANDLING ON PERLS>.
|
| +
|
| +
|
| +=item * round-trip integrity
|
| +
|
| +When you serialise a perl data structure using only data types
|
| +supported by JSON and Perl, the deserialised data structure is
|
| +identical on the Perl level. (e.g. the string "2.0" doesn't suddenly
|
| +become "2" just because it looks like a number). There I<are> minor
|
| +exceptions to this, read the MAPPING section below to learn about
|
| +those.
|
| +
|
| +
|
| +=item * strict checking of JSON correctness
|
| +
|
| +There is no guessing, no generating of illegal JSON texts by default,
|
| +and only JSON is accepted as input by default (the latter is a
|
| +security feature). But when some options are set, loose checking
|
| +features are available.
|
| +
|
| +=back
|
| +
|
| +=head1 FUNCTIONAL INTERFACE
|
| +
|
| +Some documents are copied and modified from L<JSON::XS/FUNCTIONAL INTERFACE>.
|
| +
|
| +=head2 encode_json
|
| +
|
| + $json_text = encode_json $perl_scalar
|
| +
|
| +Converts the given Perl data structure to a UTF-8 encoded, binary string.
|
| +
|
| +This function call is functionally identical to:
|
| +
|
| + $json_text = JSON::PP->new->utf8->encode($perl_scalar)
|
| +
|
| +=head2 decode_json
|
| +
|
| + $perl_scalar = decode_json $json_text
|
| +
|
| +The opposite of C<encode_json>: expects an UTF-8 (binary) string and tries
|
| +to parse that as an UTF-8 encoded JSON text, returning the resulting
|
| +reference.
|
| +
|
| +This function call is functionally identical to:
|
| +
|
| + $perl_scalar = JSON::PP->new->utf8->decode($json_text)
|
| +
|
| +=head2 JSON::PP::is_bool
|
| +
|
| + $is_boolean = JSON::PP::is_bool($scalar)
|
| +
|
| +Returns true if the passed scalar represents either JSON::PP::true or
|
| +JSON::PP::false, two constants that act like C<1> and C<0> respectively
|
| +and are also used to represent JSON C<true> and C<false> in Perl strings.
|
| +
|
| +=head2 JSON::PP::true
|
| +
|
| +Returns JSON true value which is blessed object.
|
| +It C<isa> JSON::PP::Boolean object.
|
| +
|
| +=head2 JSON::PP::false
|
| +
|
| +Returns JSON false value which is blessed object.
|
| +It C<isa> JSON::PP::Boolean object.
|
| +
|
| +=head2 JSON::PP::null
|
| +
|
| +Returns C<undef>.
|
| +
|
| +See L<MAPPING>, below, for more information on how JSON values are mapped to
|
| +Perl.
|
| +
|
| +
|
| +=head1 HOW DO I DECODE A DATA FROM OUTER AND ENCODE TO OUTER
|
| +
|
| +This section supposes that your perl version is 5.8 or later.
|
| +
|
| +If you know a JSON text from an outer world - a network, a file content, and so on,
|
| +is encoded in UTF-8, you should use C<decode_json> or C<JSON> module object
|
| +with C<utf8> enable. And the decoded result will contain UNICODE characters.
|
| +
|
| + # from network
|
| + my $json = JSON::PP->new->utf8;
|
| + my $json_text = CGI->new->param( 'json_data' );
|
| + my $perl_scalar = $json->decode( $json_text );
|
| +
|
| + # from file content
|
| + local $/;
|
| + open( my $fh, '<', 'json.data' );
|
| + $json_text = <$fh>;
|
| + $perl_scalar = decode_json( $json_text );
|
| +
|
| +If an outer data is not encoded in UTF-8, firstly you should C<decode> it.
|
| +
|
| + use Encode;
|
| + local $/;
|
| + open( my $fh, '<', 'json.data' );
|
| + my $encoding = 'cp932';
|
| + my $unicode_json_text = decode( $encoding, <$fh> ); # UNICODE
|
| +
|
| + # or you can write the below code.
|
| + #
|
| + # open( my $fh, "<:encoding($encoding)", 'json.data' );
|
| + # $unicode_json_text = <$fh>;
|
| +
|
| +In this case, C<$unicode_json_text> is of course UNICODE string.
|
| +So you B<cannot> use C<decode_json> nor C<JSON> module object with C<utf8> enable.
|
| +Instead of them, you use C<JSON> module object with C<utf8> disable.
|
| +
|
| + $perl_scalar = $json->utf8(0)->decode( $unicode_json_text );
|
| +
|
| +Or C<encode 'utf8'> and C<decode_json>:
|
| +
|
| + $perl_scalar = decode_json( encode( 'utf8', $unicode_json_text ) );
|
| + # this way is not efficient.
|
| +
|
| +And now, you want to convert your C<$perl_scalar> into JSON data and
|
| +send it to an outer world - a network or a file content, and so on.
|
| +
|
| +Your data usually contains UNICODE strings and you want the converted data to be encoded
|
| +in UTF-8, you should use C<encode_json> or C<JSON> module object with C<utf8> enable.
|
| +
|
| + print encode_json( $perl_scalar ); # to a network? file? or display?
|
| + # or
|
| + print $json->utf8->encode( $perl_scalar );
|
| +
|
| +If C<$perl_scalar> does not contain UNICODE but C<$encoding>-encoded strings
|
| +for some reason, then its characters are regarded as B<latin1> for perl
|
| +(because it does not concern with your $encoding).
|
| +You B<cannot> use C<encode_json> nor C<JSON> module object with C<utf8> enable.
|
| +Instead of them, you use C<JSON> module object with C<utf8> disable.
|
| +Note that the resulted text is a UNICODE string but no problem to print it.
|
| +
|
| + # $perl_scalar contains $encoding encoded string values
|
| + $unicode_json_text = $json->utf8(0)->encode( $perl_scalar );
|
| + # $unicode_json_text consists of characters less than 0x100
|
| + print $unicode_json_text;
|
| +
|
| +Or C<decode $encoding> all string values and C<encode_json>:
|
| +
|
| + $perl_scalar->{ foo } = decode( $encoding, $perl_scalar->{ foo } );
|
| + # ... do it to each string values, then encode_json
|
| + $json_text = encode_json( $perl_scalar );
|
| +
|
| +This method is a proper way but probably not efficient.
|
| +
|
| +See to L<Encode>, L<perluniintro>.
|
| +
|
| +
|
| +=head1 METHODS
|
| +
|
| +Basically, check to L<JSON> or L<JSON::XS>.
|
| +
|
| +=head2 new
|
| +
|
| + $json = JSON::PP->new
|
| +
|
| +Returns a new JSON::PP object that can be used to de/encode JSON
|
| +strings.
|
| +
|
| +All boolean flags described below are by default I<disabled>.
|
| +
|
| +The mutators for flags all return the JSON object again and thus calls can
|
| +be chained:
|
| +
|
| + my $json = JSON::PP->new->utf8->space_after->encode({a => [1,2]})
|
| + => {"a": [1, 2]}
|
| +
|
| +=head2 ascii
|
| +
|
| + $json = $json->ascii([$enable])
|
| +
|
| + $enabled = $json->get_ascii
|
| +
|
| +If $enable is true (or missing), then the encode method will not generate characters outside
|
| +the code range 0..127. Any Unicode characters outside that range will be escaped using either
|
| +a single \uXXXX or a double \uHHHH\uLLLLL escape sequence, as per RFC4627.
|
| +(See to L<JSON::XS/OBJECT-ORIENTED INTERFACE>).
|
| +
|
| +In Perl 5.005, there is no character having high value (more than 255).
|
| +See to L<UNICODE HANDLING ON PERLS>.
|
| +
|
| +If $enable is false, then the encode method will not escape Unicode characters unless
|
| +required by the JSON syntax or other flags. This results in a faster and more compact format.
|
| +
|
| + JSON::PP->new->ascii(1)->encode([chr 0x10401])
|
| + => ["\ud801\udc01"]
|
| +
|
| +=head2 latin1
|
| +
|
| + $json = $json->latin1([$enable])
|
| +
|
| + $enabled = $json->get_latin1
|
| +
|
| +If $enable is true (or missing), then the encode method will encode the resulting JSON
|
| +text as latin1 (or iso-8859-1), escaping any characters outside the code range 0..255.
|
| +
|
| +If $enable is false, then the encode method will not escape Unicode characters
|
| +unless required by the JSON syntax or other flags.
|
| +
|
| + JSON::XS->new->latin1->encode (["\x{89}\x{abc}"]
|
| + => ["\x{89}\\u0abc"] # (perl syntax, U+abc escaped, U+89 not)
|
| +
|
| +See to L<UNICODE HANDLING ON PERLS>.
|
| +
|
| +=head2 utf8
|
| +
|
| + $json = $json->utf8([$enable])
|
| +
|
| + $enabled = $json->get_utf8
|
| +
|
| +If $enable is true (or missing), then the encode method will encode the JSON result
|
| +into UTF-8, as required by many protocols, while the decode method expects to be handled
|
| +an UTF-8-encoded string. Please note that UTF-8-encoded strings do not contain any
|
| +characters outside the range 0..255, they are thus useful for bytewise/binary I/O.
|
| +
|
| +(In Perl 5.005, any character outside the range 0..255 does not exist.
|
| +See to L<UNICODE HANDLING ON PERLS>.)
|
| +
|
| +In future versions, enabling this option might enable autodetection of the UTF-16 and UTF-32
|
| +encoding families, as described in RFC4627.
|
| +
|
| +If $enable is false, then the encode method will return the JSON string as a (non-encoded)
|
| +Unicode string, while decode expects thus a Unicode string. Any decoding or encoding
|
| +(e.g. to UTF-8 or UTF-16) needs to be done yourself, e.g. using the Encode module.
|
| +
|
| +Example, output UTF-16BE-encoded JSON:
|
| +
|
| + use Encode;
|
| + $jsontext = encode "UTF-16BE", JSON::PP->new->encode ($object);
|
| +
|
| +Example, decode UTF-32LE-encoded JSON:
|
| +
|
| + use Encode;
|
| + $object = JSON::PP->new->decode (decode "UTF-32LE", $jsontext);
|
| +
|
| +
|
| +=head2 pretty
|
| +
|
| + $json = $json->pretty([$enable])
|
| +
|
| +This enables (or disables) all of the C<indent>, C<space_before> and
|
| +C<space_after> flags in one call to generate the most readable
|
| +(or most compact) form possible.
|
| +
|
| +Equivalent to:
|
| +
|
| + $json->indent->space_before->space_after
|
| +
|
| +=head2 indent
|
| +
|
| + $json = $json->indent([$enable])
|
| +
|
| + $enabled = $json->get_indent
|
| +
|
| +The default indent space length is three.
|
| +You can use C<indent_length> to change the length.
|
| +
|
| +=head2 space_before
|
| +
|
| + $json = $json->space_before([$enable])
|
| +
|
| + $enabled = $json->get_space_before
|
| +
|
| +If C<$enable> is true (or missing), then the C<encode> method will add an extra
|
| +optional space before the C<:> separating keys from values in JSON objects.
|
| +
|
| +If C<$enable> is false, then the C<encode> method will not add any extra
|
| +space at those places.
|
| +
|
| +This setting has no effect when decoding JSON texts.
|
| +
|
| +Example, space_before enabled, space_after and indent disabled:
|
| +
|
| + {"key" :"value"}
|
| +
|
| +=head2 space_after
|
| +
|
| + $json = $json->space_after([$enable])
|
| +
|
| + $enabled = $json->get_space_after
|
| +
|
| +If C<$enable> is true (or missing), then the C<encode> method will add an extra
|
| +optional space after the C<:> separating keys from values in JSON objects
|
| +and extra whitespace after the C<,> separating key-value pairs and array
|
| +members.
|
| +
|
| +If C<$enable> is false, then the C<encode> method will not add any extra
|
| +space at those places.
|
| +
|
| +This setting has no effect when decoding JSON texts.
|
| +
|
| +Example, space_before and indent disabled, space_after enabled:
|
| +
|
| + {"key": "value"}
|
| +
|
| +=head2 relaxed
|
| +
|
| + $json = $json->relaxed([$enable])
|
| +
|
| + $enabled = $json->get_relaxed
|
| +
|
| +If C<$enable> is true (or missing), then C<decode> will accept some
|
| +extensions to normal JSON syntax (see below). C<encode> will not be
|
| +affected in anyway. I<Be aware that this option makes you accept invalid
|
| +JSON texts as if they were valid!>. I suggest only to use this option to
|
| +parse application-specific files written by humans (configuration files,
|
| +resource files etc.)
|
| +
|
| +If C<$enable> is false (the default), then C<decode> will only accept
|
| +valid JSON texts.
|
| +
|
| +Currently accepted extensions are:
|
| +
|
| +=over 4
|
| +
|
| +=item * list items can have an end-comma
|
| +
|
| +JSON I<separates> array elements and key-value pairs with commas. This
|
| +can be annoying if you write JSON texts manually and want to be able to
|
| +quickly append elements, so this extension accepts comma at the end of
|
| +such items not just between them:
|
| +
|
| + [
|
| + 1,
|
| + 2, <- this comma not normally allowed
|
| + ]
|
| + {
|
| + "k1": "v1",
|
| + "k2": "v2", <- this comma not normally allowed
|
| + }
|
| +
|
| +=item * shell-style '#'-comments
|
| +
|
| +Whenever JSON allows whitespace, shell-style comments are additionally
|
| +allowed. They are terminated by the first carriage-return or line-feed
|
| +character, after which more white-space and comments are allowed.
|
| +
|
| + [
|
| + 1, # this comment not allowed in JSON
|
| + # neither this one...
|
| + ]
|
| +
|
| +=back
|
| +
|
| +=head2 canonical
|
| +
|
| + $json = $json->canonical([$enable])
|
| +
|
| + $enabled = $json->get_canonical
|
| +
|
| +If C<$enable> is true (or missing), then the C<encode> method will output JSON objects
|
| +by sorting their keys. This is adding a comparatively high overhead.
|
| +
|
| +If C<$enable> is false, then the C<encode> method will output key-value
|
| +pairs in the order Perl stores them (which will likely change between runs
|
| +of the same script).
|
| +
|
| +This option is useful if you want the same data structure to be encoded as
|
| +the same JSON text (given the same overall settings). If it is disabled,
|
| +the same hash might be encoded differently even if contains the same data,
|
| +as key-value pairs have no inherent ordering in Perl.
|
| +
|
| +This setting has no effect when decoding JSON texts.
|
| +
|
| +If you want your own sorting routine, you can give a code reference
|
| +or a subroutine name to C<sort_by>. See to C<JSON::PP OWN METHODS>.
|
| +
|
| +=head2 allow_nonref
|
| +
|
| + $json = $json->allow_nonref([$enable])
|
| +
|
| + $enabled = $json->get_allow_nonref
|
| +
|
| +If C<$enable> is true (or missing), then the C<encode> method can convert a
|
| +non-reference into its corresponding string, number or null JSON value,
|
| +which is an extension to RFC4627. Likewise, C<decode> will accept those JSON
|
| +values instead of croaking.
|
| +
|
| +If C<$enable> is false, then the C<encode> method will croak if it isn't
|
| +passed an arrayref or hashref, as JSON texts must either be an object
|
| +or array. Likewise, C<decode> will croak if given something that is not a
|
| +JSON object or array.
|
| +
|
| + JSON::PP->new->allow_nonref->encode ("Hello, World!")
|
| + => "Hello, World!"
|
| +
|
| +=head2 allow_unknown
|
| +
|
| + $json = $json->allow_unknown ([$enable])
|
| +
|
| + $enabled = $json->get_allow_unknown
|
| +
|
| +If $enable is true (or missing), then "encode" will *not* throw an
|
| +exception when it encounters values it cannot represent in JSON (for
|
| +example, filehandles) but instead will encode a JSON "null" value.
|
| +Note that blessed objects are not included here and are handled
|
| +separately by c<allow_nonref>.
|
| +
|
| +If $enable is false (the default), then "encode" will throw an
|
| +exception when it encounters anything it cannot encode as JSON.
|
| +
|
| +This option does not affect "decode" in any way, and it is
|
| +recommended to leave it off unless you know your communications
|
| +partner.
|
| +
|
| +=head2 allow_blessed
|
| +
|
| + $json = $json->allow_blessed([$enable])
|
| +
|
| + $enabled = $json->get_allow_blessed
|
| +
|
| +If C<$enable> is true (or missing), then the C<encode> method will not
|
| +barf when it encounters a blessed reference. Instead, the value of the
|
| +B<convert_blessed> option will decide whether C<null> (C<convert_blessed>
|
| +disabled or no C<TO_JSON> method found) or a representation of the
|
| +object (C<convert_blessed> enabled and C<TO_JSON> method found) is being
|
| +encoded. Has no effect on C<decode>.
|
| +
|
| +If C<$enable> is false (the default), then C<encode> will throw an
|
| +exception when it encounters a blessed object.
|
| +
|
| +=head2 convert_blessed
|
| +
|
| + $json = $json->convert_blessed([$enable])
|
| +
|
| + $enabled = $json->get_convert_blessed
|
| +
|
| +If C<$enable> is true (or missing), then C<encode>, upon encountering a
|
| +blessed object, will check for the availability of the C<TO_JSON> method
|
| +on the object's class. If found, it will be called in scalar context
|
| +and the resulting scalar will be encoded instead of the object. If no
|
| +C<TO_JSON> method is found, the value of C<allow_blessed> will decide what
|
| +to do.
|
| +
|
| +The C<TO_JSON> method may safely call die if it wants. If C<TO_JSON>
|
| +returns other blessed objects, those will be handled in the same
|
| +way. C<TO_JSON> must take care of not causing an endless recursion cycle
|
| +(== crash) in this case. The name of C<TO_JSON> was chosen because other
|
| +methods called by the Perl core (== not by the user of the object) are
|
| +usually in upper case letters and to avoid collisions with the C<to_json>
|
| +function or method.
|
| +
|
| +This setting does not yet influence C<decode> in any way.
|
| +
|
| +If C<$enable> is false, then the C<allow_blessed> setting will decide what
|
| +to do when a blessed object is found.
|
| +
|
| +=head2 filter_json_object
|
| +
|
| + $json = $json->filter_json_object([$coderef])
|
| +
|
| +When C<$coderef> is specified, it will be called from C<decode> each
|
| +time it decodes a JSON object. The only argument passed to the coderef
|
| +is a reference to the newly-created hash. If the code references returns
|
| +a single scalar (which need not be a reference), this value
|
| +(i.e. a copy of that scalar to avoid aliasing) is inserted into the
|
| +deserialised data structure. If it returns an empty list
|
| +(NOTE: I<not> C<undef>, which is a valid scalar), the original deserialised
|
| +hash will be inserted. This setting can slow down decoding considerably.
|
| +
|
| +When C<$coderef> is omitted or undefined, any existing callback will
|
| +be removed and C<decode> will not change the deserialised hash in any
|
| +way.
|
| +
|
| +Example, convert all JSON objects into the integer 5:
|
| +
|
| + my $js = JSON::PP->new->filter_json_object (sub { 5 });
|
| + # returns [5]
|
| + $js->decode ('[{}]'); # the given subroutine takes a hash reference.
|
| + # throw an exception because allow_nonref is not enabled
|
| + # so a lone 5 is not allowed.
|
| + $js->decode ('{"a":1, "b":2}');
|
| +
|
| +=head2 filter_json_single_key_object
|
| +
|
| + $json = $json->filter_json_single_key_object($key [=> $coderef])
|
| +
|
| +Works remotely similar to C<filter_json_object>, but is only called for
|
| +JSON objects having a single key named C<$key>.
|
| +
|
| +This C<$coderef> is called before the one specified via
|
| +C<filter_json_object>, if any. It gets passed the single value in the JSON
|
| +object. If it returns a single value, it will be inserted into the data
|
| +structure. If it returns nothing (not even C<undef> but the empty list),
|
| +the callback from C<filter_json_object> will be called next, as if no
|
| +single-key callback were specified.
|
| +
|
| +If C<$coderef> is omitted or undefined, the corresponding callback will be
|
| +disabled. There can only ever be one callback for a given key.
|
| +
|
| +As this callback gets called less often then the C<filter_json_object>
|
| +one, decoding speed will not usually suffer as much. Therefore, single-key
|
| +objects make excellent targets to serialise Perl objects into, especially
|
| +as single-key JSON objects are as close to the type-tagged value concept
|
| +as JSON gets (it's basically an ID/VALUE tuple). Of course, JSON does not
|
| +support this in any way, so you need to make sure your data never looks
|
| +like a serialised Perl hash.
|
| +
|
| +Typical names for the single object key are C<__class_whatever__>, or
|
| +C<$__dollars_are_rarely_used__$> or C<}ugly_brace_placement>, or even
|
| +things like C<__class_md5sum(classname)__>, to reduce the risk of clashing
|
| +with real hashes.
|
| +
|
| +Example, decode JSON objects of the form C<< { "__widget__" => <id> } >>
|
| +into the corresponding C<< $WIDGET{<id>} >> object:
|
| +
|
| + # return whatever is in $WIDGET{5}:
|
| + JSON::PP
|
| + ->new
|
| + ->filter_json_single_key_object (__widget__ => sub {
|
| + $WIDGET{ $_[0] }
|
| + })
|
| + ->decode ('{"__widget__": 5')
|
| +
|
| + # this can be used with a TO_JSON method in some "widget" class
|
| + # for serialisation to json:
|
| + sub WidgetBase::TO_JSON {
|
| + my ($self) = @_;
|
| +
|
| + unless ($self->{id}) {
|
| + $self->{id} = ..get..some..id..;
|
| + $WIDGET{$self->{id}} = $self;
|
| + }
|
| +
|
| + { __widget__ => $self->{id} }
|
| + }
|
| +
|
| +=head2 shrink
|
| +
|
| + $json = $json->shrink([$enable])
|
| +
|
| + $enabled = $json->get_shrink
|
| +
|
| +In JSON::XS, this flag resizes strings generated by either
|
| +C<encode> or C<decode> to their minimum size possible.
|
| +It will also try to downgrade any strings to octet-form if possible.
|
| +
|
| +In JSON::PP, it is noop about resizing strings but tries
|
| +C<utf8::downgrade> to the returned string by C<encode>.
|
| +See to L<utf8>.
|
| +
|
| +See to L<JSON::XS/OBJECT-ORIENTED INTERFACE>
|
| +
|
| +=head2 max_depth
|
| +
|
| + $json = $json->max_depth([$maximum_nesting_depth])
|
| +
|
| + $max_depth = $json->get_max_depth
|
| +
|
| +Sets the maximum nesting level (default C<512>) accepted while encoding
|
| +or decoding. If a higher nesting level is detected in JSON text or a Perl
|
| +data structure, then the encoder and decoder will stop and croak at that
|
| +point.
|
| +
|
| +Nesting level is defined by number of hash- or arrayrefs that the encoder
|
| +needs to traverse to reach a given point or the number of C<{> or C<[>
|
| +characters without their matching closing parenthesis crossed to reach a
|
| +given character in a string.
|
| +
|
| +If no argument is given, the highest possible setting will be used, which
|
| +is rarely useful.
|
| +
|
| +See L<JSON::XS/SSECURITY CONSIDERATIONS> for more info on why this is useful.
|
| +
|
| +When a large value (100 or more) was set and it de/encodes a deep nested object/text,
|
| +it may raise a warning 'Deep recursion on subroutine' at the perl runtime phase.
|
| +
|
| +=head2 max_size
|
| +
|
| + $json = $json->max_size([$maximum_string_size])
|
| +
|
| + $max_size = $json->get_max_size
|
| +
|
| +Set the maximum length a JSON text may have (in bytes) where decoding is
|
| +being attempted. The default is C<0>, meaning no limit. When C<decode>
|
| +is called on a string that is longer then this many bytes, it will not
|
| +attempt to decode the string but throw an exception. This setting has no
|
| +effect on C<encode> (yet).
|
| +
|
| +If no argument is given, the limit check will be deactivated (same as when
|
| +C<0> is specified).
|
| +
|
| +See L<JSON::XS/SECURITY CONSIDERATIONS> for more info on why this is useful.
|
| +
|
| +=head2 encode
|
| +
|
| + $json_text = $json->encode($perl_scalar)
|
| +
|
| +Converts the given Perl data structure (a simple scalar or a reference
|
| +to a hash or array) to its JSON representation. Simple scalars will be
|
| +converted into JSON string or number sequences, while references to arrays
|
| +become JSON arrays and references to hashes become JSON objects. Undefined
|
| +Perl values (e.g. C<undef>) become JSON C<null> values.
|
| +References to the integers C<0> and C<1> are converted into C<true> and C<false>.
|
| +
|
| +=head2 decode
|
| +
|
| + $perl_scalar = $json->decode($json_text)
|
| +
|
| +The opposite of C<encode>: expects a JSON text and tries to parse it,
|
| +returning the resulting simple scalar or reference. Croaks on error.
|
| +
|
| +JSON numbers and strings become simple Perl scalars. JSON arrays become
|
| +Perl arrayrefs and JSON objects become Perl hashrefs. C<true> becomes
|
| +C<1> (C<JSON::true>), C<false> becomes C<0> (C<JSON::false>) and
|
| +C<null> becomes C<undef>.
|
| +
|
| +=head2 decode_prefix
|
| +
|
| + ($perl_scalar, $characters) = $json->decode_prefix($json_text)
|
| +
|
| +This works like the C<decode> method, but instead of raising an exception
|
| +when there is trailing garbage after the first JSON object, it will
|
| +silently stop parsing there and return the number of characters consumed
|
| +so far.
|
| +
|
| + JSON->new->decode_prefix ("[1] the tail")
|
| + => ([], 3)
|
| +
|
| +=head1 INCREMENTAL PARSING
|
| +
|
| +Most of this section are copied and modified from L<JSON::XS/INCREMENTAL PARSING>.
|
| +
|
| +In some cases, there is the need for incremental parsing of JSON texts.
|
| +This module does allow you to parse a JSON stream incrementally.
|
| +It does so by accumulating text until it has a full JSON object, which
|
| +it then can decode. This process is similar to using C<decode_prefix>
|
| +to see if a full JSON object is available, but is much more efficient
|
| +(and can be implemented with a minimum of method calls).
|
| +
|
| +This module will only attempt to parse the JSON text once it is sure it
|
| +has enough text to get a decisive result, using a very simple but
|
| +truly incremental parser. This means that it sometimes won't stop as
|
| +early as the full parser, for example, it doesn't detect parenthesis
|
| +mismatches. The only thing it guarantees is that it starts decoding as
|
| +soon as a syntactically valid JSON text has been seen. This means you need
|
| +to set resource limits (e.g. C<max_size>) to ensure the parser will stop
|
| +parsing in the presence if syntax errors.
|
| +
|
| +The following methods implement this incremental parser.
|
| +
|
| +=head2 incr_parse
|
| +
|
| + $json->incr_parse( [$string] ) # void context
|
| +
|
| + $obj_or_undef = $json->incr_parse( [$string] ) # scalar context
|
| +
|
| + @obj_or_empty = $json->incr_parse( [$string] ) # list context
|
| +
|
| +This is the central parsing function. It can both append new text and
|
| +extract objects from the stream accumulated so far (both of these
|
| +functions are optional).
|
| +
|
| +If C<$string> is given, then this string is appended to the already
|
| +existing JSON fragment stored in the C<$json> object.
|
| +
|
| +After that, if the function is called in void context, it will simply
|
| +return without doing anything further. This can be used to add more text
|
| +in as many chunks as you want.
|
| +
|
| +If the method is called in scalar context, then it will try to extract
|
| +exactly I<one> JSON object. If that is successful, it will return this
|
| +object, otherwise it will return C<undef>. If there is a parse error,
|
| +this method will croak just as C<decode> would do (one can then use
|
| +C<incr_skip> to skip the erroneous part). This is the most common way of
|
| +using the method.
|
| +
|
| +And finally, in list context, it will try to extract as many objects
|
| +from the stream as it can find and return them, or the empty list
|
| +otherwise. For this to work, there must be no separators between the JSON
|
| +objects or arrays, instead they must be concatenated back-to-back. If
|
| +an error occurs, an exception will be raised as in the scalar context
|
| +case. Note that in this case, any previously-parsed JSON texts will be
|
| +lost.
|
| +
|
| +Example: Parse some JSON arrays/objects in a given string and return them.
|
| +
|
| + my @objs = JSON->new->incr_parse ("[5][7][1,2]");
|
| +
|
| +=head2 incr_text
|
| +
|
| + $lvalue_string = $json->incr_text
|
| +
|
| +This method returns the currently stored JSON fragment as an lvalue, that
|
| +is, you can manipulate it. This I<only> works when a preceding call to
|
| +C<incr_parse> in I<scalar context> successfully returned an object. Under
|
| +all other circumstances you must not call this function (I mean it.
|
| +although in simple tests it might actually work, it I<will> fail under
|
| +real world conditions). As a special exception, you can also call this
|
| +method before having parsed anything.
|
| +
|
| +This function is useful in two cases: a) finding the trailing text after a
|
| +JSON object or b) parsing multiple JSON objects separated by non-JSON text
|
| +(such as commas).
|
| +
|
| + $json->incr_text =~ s/\s*,\s*//;
|
| +
|
| +In Perl 5.005, C<lvalue> attribute is not available.
|
| +You must write codes like the below:
|
| +
|
| + $string = $json->incr_text;
|
| + $string =~ s/\s*,\s*//;
|
| + $json->incr_text( $string );
|
| +
|
| +=head2 incr_skip
|
| +
|
| + $json->incr_skip
|
| +
|
| +This will reset the state of the incremental parser and will remove the
|
| +parsed text from the input buffer. This is useful after C<incr_parse>
|
| +died, in which case the input buffer and incremental parser state is left
|
| +unchanged, to skip the text parsed so far and to reset the parse state.
|
| +
|
| +=head2 incr_reset
|
| +
|
| + $json->incr_reset
|
| +
|
| +This completely resets the incremental parser, that is, after this call,
|
| +it will be as if the parser had never parsed anything.
|
| +
|
| +This is useful if you want to repeatedly parse JSON objects and want to
|
| +ignore any trailing data, which means you have to reset the parser after
|
| +each successful decode.
|
| +
|
| +See to L<JSON::XS/INCREMENTAL PARSING> for examples.
|
| +
|
| +
|
| +=head1 JSON::PP OWN METHODS
|
| +
|
| +=head2 allow_singlequote
|
| +
|
| + $json = $json->allow_singlequote([$enable])
|
| +
|
| +If C<$enable> is true (or missing), then C<decode> will accept
|
| +JSON strings quoted by single quotations that are invalid JSON
|
| +format.
|
| +
|
| + $json->allow_singlequote->decode({"foo":'bar'});
|
| + $json->allow_singlequote->decode({'foo':"bar"});
|
| + $json->allow_singlequote->decode({'foo':'bar'});
|
| +
|
| +As same as the C<relaxed> option, this option may be used to parse
|
| +application-specific files written by humans.
|
| +
|
| +
|
| +=head2 allow_barekey
|
| +
|
| + $json = $json->allow_barekey([$enable])
|
| +
|
| +If C<$enable> is true (or missing), then C<decode> will accept
|
| +bare keys of JSON object that are invalid JSON format.
|
| +
|
| +As same as the C<relaxed> option, this option may be used to parse
|
| +application-specific files written by humans.
|
| +
|
| + $json->allow_barekey->decode('{foo:"bar"}');
|
| +
|
| +=head2 allow_bignum
|
| +
|
| + $json = $json->allow_bignum([$enable])
|
| +
|
| +If C<$enable> is true (or missing), then C<decode> will convert
|
| +the big integer Perl cannot handle as integer into a L<Math::BigInt>
|
| +object and convert a floating number (any) into a L<Math::BigFloat>.
|
| +
|
| +On the contrary, C<encode> converts C<Math::BigInt> objects and C<Math::BigFloat>
|
| +objects into JSON numbers with C<allow_blessed> enable.
|
| +
|
| + $json->allow_nonref->allow_blessed->allow_bignum;
|
| + $bigfloat = $json->decode('2.000000000000000000000000001');
|
| + print $json->encode($bigfloat);
|
| + # => 2.000000000000000000000000001
|
| +
|
| +See to L<JSON::XS/MAPPING> about the normal conversion of JSON number.
|
| +
|
| +=head2 loose
|
| +
|
| + $json = $json->loose([$enable])
|
| +
|
| +The unescaped [\x00-\x1f\x22\x2f\x5c] strings are invalid in JSON strings
|
| +and the module doesn't allow to C<decode> to these (except for \x2f).
|
| +If C<$enable> is true (or missing), then C<decode> will accept these
|
| +unescaped strings.
|
| +
|
| + $json->loose->decode(qq|["abc
|
| + def"]|);
|
| +
|
| +See L<JSON::XS/SSECURITY CONSIDERATIONS>.
|
| +
|
| +=head2 escape_slash
|
| +
|
| + $json = $json->escape_slash([$enable])
|
| +
|
| +According to JSON Grammar, I<slash> (U+002F) is escaped. But default
|
| +JSON::PP (as same as JSON::XS) encodes strings without escaping slash.
|
| +
|
| +If C<$enable> is true (or missing), then C<encode> will escape slashes.
|
| +
|
| +=head2 indent_length
|
| +
|
| + $json = $json->indent_length($length)
|
| +
|
| +JSON::XS indent space length is 3 and cannot be changed.
|
| +JSON::PP set the indent space length with the given $length.
|
| +The default is 3. The acceptable range is 0 to 15.
|
| +
|
| +=head2 sort_by
|
| +
|
| + $json = $json->sort_by($function_name)
|
| + $json = $json->sort_by($subroutine_ref)
|
| +
|
| +If $function_name or $subroutine_ref are set, its sort routine are used
|
| +in encoding JSON objects.
|
| +
|
| + $js = $pc->sort_by(sub { $JSON::PP::a cmp $JSON::PP::b })->encode($obj);
|
| + # is($js, q|{"a":1,"b":2,"c":3,"d":4,"e":5,"f":6,"g":7,"h":8,"i":9}|);
|
| +
|
| + $js = $pc->sort_by('own_sort')->encode($obj);
|
| + # is($js, q|{"a":1,"b":2,"c":3,"d":4,"e":5,"f":6,"g":7,"h":8,"i":9}|);
|
| +
|
| + sub JSON::PP::own_sort { $JSON::PP::a cmp $JSON::PP::b }
|
| +
|
| +As the sorting routine runs in the JSON::PP scope, the given
|
| +subroutine name and the special variables C<$a>, C<$b> will begin
|
| +'JSON::PP::'.
|
| +
|
| +If $integer is set, then the effect is same as C<canonical> on.
|
| +
|
| +=head1 INTERNAL
|
| +
|
| +For developers.
|
| +
|
| +=over
|
| +
|
| +=item PP_encode_box
|
| +
|
| +Returns
|
| +
|
| + {
|
| + depth => $depth,
|
| + indent_count => $indent_count,
|
| + }
|
| +
|
| +
|
| +=item PP_decode_box
|
| +
|
| +Returns
|
| +
|
| + {
|
| + text => $text,
|
| + at => $at,
|
| + ch => $ch,
|
| + len => $len,
|
| + depth => $depth,
|
| + encoding => $encoding,
|
| + is_valid_utf8 => $is_valid_utf8,
|
| + };
|
| +
|
| +=back
|
| +
|
| +=head1 MAPPING
|
| +
|
| +This section is copied from JSON::XS and modified to C<JSON::PP>.
|
| +JSON::XS and JSON::PP mapping mechanisms are almost equivalent.
|
| +
|
| +See to L<JSON::XS/MAPPING>.
|
| +
|
| +=head2 JSON -> PERL
|
| +
|
| +=over 4
|
| +
|
| +=item object
|
| +
|
| +A JSON object becomes a reference to a hash in Perl. No ordering of object
|
| +keys is preserved (JSON does not preserver object key ordering itself).
|
| +
|
| +=item array
|
| +
|
| +A JSON array becomes a reference to an array in Perl.
|
| +
|
| +=item string
|
| +
|
| +A JSON string becomes a string scalar in Perl - Unicode codepoints in JSON
|
| +are represented by the same codepoints in the Perl string, so no manual
|
| +decoding is necessary.
|
| +
|
| +=item number
|
| +
|
| +A JSON number becomes either an integer, numeric (floating point) or
|
| +string scalar in perl, depending on its range and any fractional parts. On
|
| +the Perl level, there is no difference between those as Perl handles all
|
| +the conversion details, but an integer may take slightly less memory and
|
| +might represent more values exactly than floating point numbers.
|
| +
|
| +If the number consists of digits only, C<JSON> will try to represent
|
| +it as an integer value. If that fails, it will try to represent it as
|
| +a numeric (floating point) value if that is possible without loss of
|
| +precision. Otherwise it will preserve the number as a string value (in
|
| +which case you lose roundtripping ability, as the JSON number will be
|
| +re-encoded to a JSON string).
|
| +
|
| +Numbers containing a fractional or exponential part will always be
|
| +represented as numeric (floating point) values, possibly at a loss of
|
| +precision (in which case you might lose perfect roundtripping ability, but
|
| +the JSON number will still be re-encoded as a JSON number).
|
| +
|
| +Note that precision is not accuracy - binary floating point values cannot
|
| +represent most decimal fractions exactly, and when converting from and to
|
| +floating point, C<JSON> only guarantees precision up to but not including
|
| +the least significant bit.
|
| +
|
| +When C<allow_bignum> is enable, the big integers
|
| +and the numeric can be optionally converted into L<Math::BigInt> and
|
| +L<Math::BigFloat> objects.
|
| +
|
| +=item true, false
|
| +
|
| +These JSON atoms become C<JSON::PP::true> and C<JSON::PP::false>,
|
| +respectively. They are overloaded to act almost exactly like the numbers
|
| +C<1> and C<0>. You can check whether a scalar is a JSON boolean by using
|
| +the C<JSON::is_bool> function.
|
| +
|
| + print JSON::PP::true . "\n";
|
| + => true
|
| + print JSON::PP::true + 1;
|
| + => 1
|
| +
|
| + ok(JSON::true eq '1');
|
| + ok(JSON::true == 1);
|
| +
|
| +C<JSON> will install these missing overloading features to the backend modules.
|
| +
|
| +
|
| +=item null
|
| +
|
| +A JSON null atom becomes C<undef> in Perl.
|
| +
|
| +C<JSON::PP::null> returns C<undef>.
|
| +
|
| +=back
|
| +
|
| +
|
| +=head2 PERL -> JSON
|
| +
|
| +The mapping from Perl to JSON is slightly more difficult, as Perl is a
|
| +truly typeless language, so we can only guess which JSON type is meant by
|
| +a Perl value.
|
| +
|
| +=over 4
|
| +
|
| +=item hash references
|
| +
|
| +Perl hash references become JSON objects. As there is no inherent ordering
|
| +in hash keys (or JSON objects), they will usually be encoded in a
|
| +pseudo-random order that can change between runs of the same program but
|
| +stays generally the same within a single run of a program. C<JSON>
|
| +optionally sort the hash keys (determined by the I<canonical> flag), so
|
| +the same data structure will serialise to the same JSON text (given same
|
| +settings and version of JSON::XS), but this incurs a runtime overhead
|
| +and is only rarely useful, e.g. when you want to compare some JSON text
|
| +against another for equality.
|
| +
|
| +
|
| +=item array references
|
| +
|
| +Perl array references become JSON arrays.
|
| +
|
| +=item other references
|
| +
|
| +Other unblessed references are generally not allowed and will cause an
|
| +exception to be thrown, except for references to the integers C<0> and
|
| +C<1>, which get turned into C<false> and C<true> atoms in JSON. You can
|
| +also use C<JSON::false> and C<JSON::true> to improve readability.
|
| +
|
| + to_json [\0,JSON::PP::true] # yields [false,true]
|
| +
|
| +=item JSON::PP::true, JSON::PP::false, JSON::PP::null
|
| +
|
| +These special values become JSON true and JSON false values,
|
| +respectively. You can also use C<\1> and C<\0> directly if you want.
|
| +
|
| +JSON::PP::null returns C<undef>.
|
| +
|
| +=item blessed objects
|
| +
|
| +Blessed objects are not directly representable in JSON. See the
|
| +C<allow_blessed> and C<convert_blessed> methods on various options on
|
| +how to deal with this: basically, you can choose between throwing an
|
| +exception, encoding the reference as if it weren't blessed, or provide
|
| +your own serialiser method.
|
| +
|
| +See to L<convert_blessed>.
|
| +
|
| +=item simple scalars
|
| +
|
| +Simple Perl scalars (any scalar that is not a reference) are the most
|
| +difficult objects to encode: JSON::XS and JSON::PP will encode undefined scalars as
|
| +JSON C<null> values, scalars that have last been used in a string context
|
| +before encoding as JSON strings, and anything else as number value:
|
| +
|
| + # dump as number
|
| + encode_json [2] # yields [2]
|
| + encode_json [-3.0e17] # yields [-3e+17]
|
| + my $value = 5; encode_json [$value] # yields [5]
|
| +
|
| + # used as string, so dump as string
|
| + print $value;
|
| + encode_json [$value] # yields ["5"]
|
| +
|
| + # undef becomes null
|
| + encode_json [undef] # yields [null]
|
| +
|
| +You can force the type to be a string by stringifying it:
|
| +
|
| + my $x = 3.1; # some variable containing a number
|
| + "$x"; # stringified
|
| + $x .= ""; # another, more awkward way to stringify
|
| + print $x; # perl does it for you, too, quite often
|
| +
|
| +You can force the type to be a number by numifying it:
|
| +
|
| + my $x = "3"; # some variable containing a string
|
| + $x += 0; # numify it, ensuring it will be dumped as a number
|
| + $x *= 1; # same thing, the choice is yours.
|
| +
|
| +You can not currently force the type in other, less obscure, ways.
|
| +
|
| +Note that numerical precision has the same meaning as under Perl (so
|
| +binary to decimal conversion follows the same rules as in Perl, which
|
| +can differ to other languages). Also, your perl interpreter might expose
|
| +extensions to the floating point numbers of your platform, such as
|
| +infinities or NaN's - these cannot be represented in JSON, and it is an
|
| +error to pass those in.
|
| +
|
| +=item Big Number
|
| +
|
| +When C<allow_bignum> is enable,
|
| +C<encode> converts C<Math::BigInt> objects and C<Math::BigFloat>
|
| +objects into JSON numbers.
|
| +
|
| +
|
| +=back
|
| +
|
| +=head1 UNICODE HANDLING ON PERLS
|
| +
|
| +If you do not know about Unicode on Perl well,
|
| +please check L<JSON::XS/A FEW NOTES ON UNICODE AND PERL>.
|
| +
|
| +=head2 Perl 5.8 and later
|
| +
|
| +Perl can handle Unicode and the JSON::PP de/encode methods also work properly.
|
| +
|
| + $json->allow_nonref->encode(chr hex 3042);
|
| + $json->allow_nonref->encode(chr hex 12345);
|
| +
|
| +Returns C<"\u3042"> and C<"\ud808\udf45"> respectively.
|
| +
|
| + $json->allow_nonref->decode('"\u3042"');
|
| + $json->allow_nonref->decode('"\ud808\udf45"');
|
| +
|
| +Returns UTF-8 encoded strings with UTF8 flag, regarded as C<U+3042> and C<U+12345>.
|
| +
|
| +Note that the versions from Perl 5.8.0 to 5.8.2, Perl built-in C<join> was broken,
|
| +so JSON::PP wraps the C<join> with a subroutine. Thus JSON::PP works slow in the versions.
|
| +
|
| +
|
| +=head2 Perl 5.6
|
| +
|
| +Perl can handle Unicode and the JSON::PP de/encode methods also work.
|
| +
|
| +=head2 Perl 5.005
|
| +
|
| +Perl 5.005 is a byte semantics world -- all strings are sequences of bytes.
|
| +That means the unicode handling is not available.
|
| +
|
| +In encoding,
|
| +
|
| + $json->allow_nonref->encode(chr hex 3042); # hex 3042 is 12354.
|
| + $json->allow_nonref->encode(chr hex 12345); # hex 12345 is 74565.
|
| +
|
| +Returns C<B> and C<E>, as C<chr> takes a value more than 255, it treats
|
| +as C<$value % 256>, so the above codes are equivalent to :
|
| +
|
| + $json->allow_nonref->encode(chr 66);
|
| + $json->allow_nonref->encode(chr 69);
|
| +
|
| +In decoding,
|
| +
|
| + $json->decode('"\u00e3\u0081\u0082"');
|
| +
|
| +The returned is a byte sequence C<0xE3 0x81 0x82> for UTF-8 encoded
|
| +japanese character (C<HIRAGANA LETTER A>).
|
| +And if it is represented in Unicode code point, C<U+3042>.
|
| +
|
| +Next,
|
| +
|
| + $json->decode('"\u3042"');
|
| +
|
| +We ordinary expect the returned value is a Unicode character C<U+3042>.
|
| +But here is 5.005 world. This is C<0xE3 0x81 0x82>.
|
| +
|
| + $json->decode('"\ud808\udf45"');
|
| +
|
| +This is not a character C<U+12345> but bytes - C<0xf0 0x92 0x8d 0x85>.
|
| +
|
| +
|
| +=head1 TODO
|
| +
|
| +=over
|
| +
|
| +=item speed
|
| +
|
| +=item memory saving
|
| +
|
| +=back
|
| +
|
| +
|
| +=head1 SEE ALSO
|
| +
|
| +Most of the document are copied and modified from JSON::XS doc.
|
| +
|
| +L<JSON::XS>
|
| +
|
| +RFC4627 (L<http://www.ietf.org/rfc/rfc4627.txt>)
|
| +
|
| +=head1 AUTHOR
|
| +
|
| +Makamaka Hannyaharamitu, E<lt>makamaka[at]cpan.orgE<gt>
|
| +
|
| +
|
| +=head1 COPYRIGHT AND LICENSE
|
| +
|
| +Copyright 2007-2012 by Makamaka Hannyaharamitu
|
| +
|
| +This library is free software; you can redistribute it and/or modify
|
| +it under the same terms as Perl itself.
|
| +
|
| +=cut
|
|
|
Chromium Code Reviews
Issue 15736030:
Add JSON.pm to third_party (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src