1Mojo::JSON(3) User Contributed Perl Documentation Mojo::JSON(3)
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6 Mojo::JSON - Minimalistic JSON
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9 use Mojo::JSON qw(decode_json encode_json);
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11 my $bytes = encode_json {foo => [1, 2], bar => 'hello!', baz => \1};
12 my $hash = decode_json $bytes;
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15 Mojo::JSON is a minimalistic and possibly the fastest pure-Perl
16 implementation of RFC 8259 <http://tools.ietf.org/html/rfc8259>.
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18 It supports normal Perl data types like scalar, array reference, hash
19 reference and will try to call the "TO_JSON" method on blessed
20 references, or stringify them if it doesn't exist. Differentiating
21 between strings and numbers in Perl is hard, depending on how it has
22 been used, a scalar can be both at the same time. The string value has
23 a higher precedence unless both representations are equivalent.
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25 [1, -2, 3] -> [1, -2, 3]
26 {"foo": "bar"} -> {foo => 'bar'}
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28 Literal names will be translated to and from Mojo::JSON constants or a
29 similar native Perl value.
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31 true -> Mojo::JSON->true
32 false -> Mojo::JSON->false
33 null -> undef
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35 In addition scalar references will be used to generate booleans, based
36 on if their values are true or false.
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38 \1 -> true
39 \0 -> false
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41 The character "/" will always be escaped to prevent XSS attacks.
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43 "</script>" -> "<\/script>"
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45 For better performance the optional module Cpanel::JSON::XS (4.09+)
46 will be used automatically if possible. This can also be disabled with
47 the "MOJO_NO_JSON_XS" environment variable.
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50 Mojo::JSON implements the following functions, which can be imported
51 individually.
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53 decode_json
54 my $value = decode_json $bytes;
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56 Decode JSON to Perl value and die if decoding fails.
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58 encode_json
59 my $bytes = encode_json {i => '♥ mojolicious'};
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61 Encode Perl value to JSON.
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63 false
64 my $false = false;
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66 False value, used because Perl has no native equivalent.
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68 from_json
69 my $value = from_json $chars;
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71 Decode JSON text that is not "UTF-8" encoded to Perl value and die if
72 decoding fails.
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74 j
75 my $bytes = j [1, 2, 3];
76 my $bytes = j {i => '♥ mojolicious'};
77 my $value = j $bytes;
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79 Encode Perl data structure (which may only be an array reference or
80 hash reference) or decode JSON, an "undef" return value indicates a
81 bare "null" or that decoding failed.
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83 to_json
84 my $chars = to_json {i => '♥ mojolicious'};
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86 Encode Perl value to JSON text without "UTF-8" encoding it.
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88 true
89 my $true = true;
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91 True value, used because Perl has no native equivalent.
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94 Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.
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98perl v5.30.1 2020-01-30 Mojo::JSON(3)