… | |
… | |
101 | |
101 | |
102 | package JSON::XS; |
102 | package JSON::XS; |
103 | |
103 | |
104 | use common::sense; |
104 | use common::sense; |
105 | |
105 | |
106 | our $VERSION = 3.01; |
106 | our $VERSION = 3.02; |
107 | our @ISA = qw(Exporter); |
107 | our @ISA = qw(Exporter); |
108 | |
108 | |
109 | our @EXPORT = qw(encode_json decode_json); |
109 | our @EXPORT = qw(encode_json decode_json); |
110 | |
110 | |
111 | use Exporter; |
111 | use Exporter; |
… | |
… | |
697 | |
697 | |
698 | This is useful if your JSON texts are not delimited by an outer protocol |
698 | This is useful if your JSON texts are not delimited by an outer protocol |
699 | and you need to know where the JSON text ends. |
699 | and you need to know where the JSON text ends. |
700 | |
700 | |
701 | JSON::XS->new->decode_prefix ("[1] the tail") |
701 | JSON::XS->new->decode_prefix ("[1] the tail") |
702 | => ([], 3) |
702 | => ([1], 3) |
703 | |
703 | |
704 | =back |
704 | =back |
705 | |
705 | |
706 | |
706 | |
707 | =head1 INCREMENTAL PARSING |
707 | =head1 INCREMENTAL PARSING |
… | |
… | |
1563 | are browser design bugs, but it is still you who will have to deal with |
1563 | are browser design bugs, but it is still you who will have to deal with |
1564 | it, as major browser developers care only for features, not about getting |
1564 | it, as major browser developers care only for features, not about getting |
1565 | security right). |
1565 | security right). |
1566 | |
1566 | |
1567 | |
1567 | |
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1568 | =head1 "OLD" VS. "NEW" JSON (RFC 4627 VS. RFC 7159) |
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1569 | |
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1570 | TL;DR: Due to security concerns, JSON::XS will not allow scalar data in |
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1571 | JSON texts by default - you need to create your own JSON::XS object and |
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1572 | enable C<allow_nonref>: |
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1573 | |
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1574 | |
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1575 | my $json = JSON::XS->new->allow_nonref; |
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1576 | |
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1577 | $text = $json->encode ($data); |
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1578 | $data = $json->decode ($text); |
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1579 | |
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1580 | The long version: JSON being an important and supposedly stable format, |
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1581 | the IETF standardised it as RFC 4627 in 2006. Unfortunately, the inventor |
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1582 | of JSON, Dougles Crockford, unilaterally changed the definition of JSON in |
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1583 | javascript. Rather than create a fork, the IETF decided to standardise the |
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1584 | new syntax (apparently, so Iw as told, without finding it very amusing). |
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1585 | |
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1586 | The biggest difference between thed original JSON and the new JSON is that |
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1587 | the new JSON supports scalars (anything other than arrays and objects) at |
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1588 | the toplevel of a JSON text. While this is strictly backwards compatible |
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1589 | to older versions, it breaks a number of protocols that relied on sending |
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1590 | JSON back-to-back, and is a minor security concern. |
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1591 | |
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1592 | For example, imagine you have two banks communicating, and on one side, |
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1593 | trhe JSON coder gets upgraded. Two messages, such as C<10> and C<1000> |
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1594 | might then be confused to mean C<101000>, something that couldn't happen |
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1595 | in the original JSON, because niether of these messages would be valid |
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1596 | JSON. |
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1597 | |
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1598 | If one side accepts these messages, then an upgrade in the coder on either |
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1599 | side could result in this becoming exploitable. |
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1600 | |
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1601 | This module has always allowed these messages as an optional extension, by |
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1602 | default disabled. The security concerns are the reason why the default is |
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1603 | still disabled, but future versions might/will likely upgrade to the newer |
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1604 | RFC as default format, so you are advised to check your implementation |
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1605 | and/or override the default with C<< ->allow_nonref (0) >> to ensure that |
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1606 | future versions are safe. |
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1607 | |
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1608 | |
1568 | =head1 INTEROPERABILITY WITH OTHER MODULES |
1609 | =head1 INTEROPERABILITY WITH OTHER MODULES |
1569 | |
1610 | |
1570 | C<JSON::XS> uses the L<Types::Serialiser> module to provide boolean |
1611 | C<JSON::XS> uses the L<Types::Serialiser> module to provide boolean |
1571 | constants. That means that the JSON true and false values will be |
1612 | constants. That means that the JSON true and false values will be |
1572 | comaptible to true and false values of iother modules that do the same, |
1613 | comaptible to true and false values of iother modules that do the same, |