… | |
… | |
261 | The concept of "valid UTF-8" used is perl's concept, which is a superset |
261 | The concept of "valid UTF-8" used is perl's concept, which is a superset |
262 | of the official UTF-8. |
262 | of the official UTF-8. |
263 | |
263 | |
264 | If C<$enable> is false (the default), then C<decode> will blindly accept |
264 | If C<$enable> is false (the default), then C<decode> will blindly accept |
265 | UTF-8 data, marking them as valid UTF-8 in the resulting data structure |
265 | UTF-8 data, marking them as valid UTF-8 in the resulting data structure |
266 | regardless of whether thats true or not. |
266 | regardless of whether that's true or not. |
267 | |
267 | |
268 | Perl isn't too happy about corrupted UTF-8 in strings, but should |
268 | Perl isn't too happy about corrupted UTF-8 in strings, but should |
269 | generally not crash or do similarly evil things. Extensions might be not |
269 | generally not crash or do similarly evil things. Extensions might be not |
270 | so forgiving, so it's recommended to turn on this setting if you receive |
270 | so forgiving, so it's recommended to turn on this setting if you receive |
271 | untrusted CBOR. |
271 | untrusted CBOR. |
… | |
… | |
481 | |
481 | |
482 | =item hash references |
482 | =item hash references |
483 | |
483 | |
484 | Perl hash references become CBOR maps. As there is no inherent ordering in |
484 | Perl hash references become CBOR maps. As there is no inherent ordering in |
485 | hash keys (or CBOR maps), they will usually be encoded in a pseudo-random |
485 | hash keys (or CBOR maps), they will usually be encoded in a pseudo-random |
486 | order. This order can be different each time a hahs is encoded. |
486 | order. This order can be different each time a hash is encoded. |
487 | |
487 | |
488 | Currently, tied hashes will use the indefinite-length format, while normal |
488 | Currently, tied hashes will use the indefinite-length format, while normal |
489 | hashes will use the fixed-length format. |
489 | hashes will use the fixed-length format. |
490 | |
490 | |
491 | =item array references |
491 | =item array references |
… | |
… | |
804 | additional tags (such as base64url). |
804 | additional tags (such as base64url). |
805 | |
805 | |
806 | =head2 ENFORCED TAGS |
806 | =head2 ENFORCED TAGS |
807 | |
807 | |
808 | These tags are always handled when decoding, and their handling cannot be |
808 | These tags are always handled when decoding, and their handling cannot be |
809 | overriden by the user. |
809 | overridden by the user. |
810 | |
810 | |
811 | =over 4 |
811 | =over 4 |
812 | |
812 | |
813 | =item 26 (perl-object, L<http://cbor.schmorp.de/perl-object>) |
813 | =item 26 (perl-object, L<http://cbor.schmorp.de/perl-object>) |
814 | |
814 | |
… | |
… | |
842 | encoded, however, when C<pack_strings> is enabled. |
842 | encoded, however, when C<pack_strings> is enabled. |
843 | |
843 | |
844 | =item 22098 (indirection, L<http://cbor.schmorp.de/indirection>) |
844 | =item 22098 (indirection, L<http://cbor.schmorp.de/indirection>) |
845 | |
845 | |
846 | This tag is automatically generated when a reference are encountered (with |
846 | This tag is automatically generated when a reference are encountered (with |
847 | the exception of hash and array refernces). It is converted to a reference |
847 | the exception of hash and array references). It is converted to a reference |
848 | when decoding. |
848 | when decoding. |
849 | |
849 | |
850 | =item 55799 (self-describe CBOR, RFC 7049) |
850 | =item 55799 (self-describe CBOR, RFC 7049) |
851 | |
851 | |
852 | This value is not generated on encoding (unless explicitly requested by |
852 | This value is not generated on encoding (unless explicitly requested by |
… | |
… | |
855 | =back |
855 | =back |
856 | |
856 | |
857 | =head2 NON-ENFORCED TAGS |
857 | =head2 NON-ENFORCED TAGS |
858 | |
858 | |
859 | These tags have default filters provided when decoding. Their handling can |
859 | These tags have default filters provided when decoding. Their handling can |
860 | be overriden by changing the C<%CBOR::XS::FILTER> entry for the tag, or by |
860 | be overridden by changing the C<%CBOR::XS::FILTER> entry for the tag, or by |
861 | providing a custom C<filter> callback when decoding. |
861 | providing a custom C<filter> callback when decoding. |
862 | |
862 | |
863 | When they result in decoding into a specific Perl class, the module |
863 | When they result in decoding into a specific Perl class, the module |
864 | usually provides a corresponding C<TO_CBOR> method as well. |
864 | usually provides a corresponding C<TO_CBOR> method as well. |
865 | |
865 | |
… | |
… | |
907 | C<URI::TO_CBOR> method again results in a CBOR URI value. |
907 | C<URI::TO_CBOR> method again results in a CBOR URI value. |
908 | |
908 | |
909 | =back |
909 | =back |
910 | |
910 | |
911 | =cut |
911 | =cut |
912 | |
|
|
913 | our %FILTER = ( |
|
|
914 | # 0 # rfc4287 datetime, utf-8 |
|
|
915 | # 1 # unix timestamp, any |
|
|
916 | |
|
|
917 | 2 => sub { # pos bigint |
|
|
918 | require Math::BigInt; |
|
|
919 | Math::BigInt->new ("0x" . unpack "H*", pop) |
|
|
920 | }, |
|
|
921 | |
|
|
922 | 3 => sub { # neg bigint |
|
|
923 | require Math::BigInt; |
|
|
924 | -Math::BigInt->new ("0x" . unpack "H*", pop) |
|
|
925 | }, |
|
|
926 | |
|
|
927 | 4 => sub { # decimal fraction, array |
|
|
928 | require Math::BigFloat; |
|
|
929 | Math::BigFloat->new ($_[1][1] . "E" . $_[1][0]) |
|
|
930 | }, |
|
|
931 | |
|
|
932 | 5 => sub { # bigfloat, array |
|
|
933 | require Math::BigFloat; |
|
|
934 | scalar Math::BigFloat->new ($_[1][1])->blsft ($_[1][0], 2) |
|
|
935 | }, |
|
|
936 | |
|
|
937 | 21 => sub { pop }, # expected conversion to base64url encoding |
|
|
938 | 22 => sub { pop }, # expected conversion to base64 encoding |
|
|
939 | 23 => sub { pop }, # expected conversion to base16 encoding |
|
|
940 | |
|
|
941 | # 24 # embedded cbor, byte string |
|
|
942 | |
|
|
943 | 32 => sub { |
|
|
944 | require URI; |
|
|
945 | URI->new (pop) |
|
|
946 | }, |
|
|
947 | |
|
|
948 | # 33 # base64url rfc4648, utf-8 |
|
|
949 | # 34 # base64 rfc46484, utf-8 |
|
|
950 | # 35 # regex pcre/ecma262, utf-8 |
|
|
951 | # 36 # mime message rfc2045, utf-8 |
|
|
952 | ); |
|
|
953 | |
|
|
954 | |
912 | |
955 | =head1 CBOR and JSON |
913 | =head1 CBOR and JSON |
956 | |
914 | |
957 | CBOR is supposed to implement a superset of the JSON data model, and is, |
915 | CBOR is supposed to implement a superset of the JSON data model, and is, |
958 | with some coercion, able to represent all JSON texts (something that other |
916 | with some coercion, able to represent all JSON texts (something that other |
… | |
… | |
1096 | Math::BigFloat->new ($_[1][1] . "E" . $_[1][0]) |
1054 | Math::BigFloat->new ($_[1][1] . "E" . $_[1][0]) |
1097 | }, |
1055 | }, |
1098 | |
1056 | |
1099 | 5 => sub { # bigfloat, array |
1057 | 5 => sub { # bigfloat, array |
1100 | require Math::BigFloat; |
1058 | require Math::BigFloat; |
1101 | scalar Math::BigFloat->new ($_[1][1])->blsft ($_[1][0], 2) |
1059 | scalar Math::BigFloat->new ($_[1][1]) * Math::BigFloat->new (2)->bpow ($_[1][0]) |
1102 | }, |
1060 | }, |
1103 | |
1061 | |
1104 | 21 => sub { pop }, # expected conversion to base64url encoding |
1062 | 21 => sub { pop }, # expected conversion to base64url encoding |
1105 | 22 => sub { pop }, # expected conversion to base64 encoding |
1063 | 22 => sub { pop }, # expected conversion to base64 encoding |
1106 | 23 => sub { pop }, # expected conversion to base16 encoding |
1064 | 23 => sub { pop }, # expected conversion to base16 encoding |