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.\" ========================================================================
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.IX Title "Mojo::JSON 3pm"
.TH Mojo::JSON 3pm "2017-01-24" "perl v5.24.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
Mojo::JSON \- Minimalistic JSON
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Mojo::JSON qw(decode_json encode_json);
\&
\&  my $bytes = encode_json {foo => [1, 2], bar => \*(Aqhello!\*(Aq, baz => \e1};
\&  my $hash  = decode_json $bytes;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Mojo::JSON is a minimalistic and possibly the fastest pure-Perl
implementation of \s-1RFC 7159\s0 <http://tools.ietf.org/html/rfc7159>.
.PP
It supports normal Perl data types like scalar, array reference, hash reference
and will try to call the \f(CW\*(C`TO_JSON\*(C'\fR method on blessed references, or stringify
them if it doesn't exist. Differentiating between strings and numbers in Perl
is hard, depending on how it has been used, a scalar can be both at the same
time. The string value has a higher precedence unless both representations are
equivalent.
.PP
.Vb 2
\&  [1, \-2, 3]     \-> [1, \-2, 3]
\&  {"foo": "bar"} \-> {foo => \*(Aqbar\*(Aq}
.Ve
.PP
Literal names will be translated to and from Mojo::JSON constants or a
similar native Perl value.
.PP
.Vb 3
\&  true  \-> Mojo::JSON\->true
\&  false \-> Mojo::JSON\->false
\&  null  \-> undef
.Ve
.PP
In addition scalar references will be used to generate booleans, based on if
their values are true or false.
.PP
.Vb 2
\&  \e1 \-> true
\&  \e0 \-> false
.Ve
.PP
The two Unicode whitespace characters \f(CW\*(C`u2028\*(C'\fR and \f(CW\*(C`u2029\*(C'\fR will always be
escaped to make \s-1JSONP\s0 easier, and the character \f(CW\*(C`/\*(C'\fR to prevent \s-1XSS\s0 attacks.
.PP
.Vb 1
\&  "\ex{2028}\ex{2029}</script>" \-> "\eu2028\eu2029<\e/script>"
.Ve
.SH "FUNCTIONS"
.IX Header "FUNCTIONS"
Mojo::JSON implements the following functions, which can be imported
individually.
.SS "decode_json"
.IX Subsection "decode_json"
.Vb 1
\&  my $value = decode_json $bytes;
.Ve
.PP
Decode \s-1JSON\s0 to Perl value and die if decoding fails.
.SS "encode_json"
.IX Subsection "encode_json"
.Vb 1
\&  my $bytes = encode_json {i => \*(Aq♥ mojolicious\*(Aq};
.Ve
.PP
Encode Perl value to \s-1JSON.\s0
.SS "false"
.IX Subsection "false"
.Vb 1
\&  my $false = false;
.Ve
.PP
False value, used because Perl has no native equivalent.
.SS "from_json"
.IX Subsection "from_json"
.Vb 1
\&  my $value = from_json $chars;
.Ve
.PP
Decode \s-1JSON\s0 text that is not \f(CW\*(C`UTF\-8\*(C'\fR encoded to Perl value and die if decoding
fails.
.SS "j"
.IX Subsection "j"
.Vb 3
\&  my $bytes = j [1, 2, 3];
\&  my $bytes = j {i => \*(Aq♥ mojolicious\*(Aq};
\&  my $value = j $bytes;
.Ve
.PP
Encode Perl data structure (which may only be an array reference or hash
reference) or decode \s-1JSON,\s0 an \f(CW\*(C`undef\*(C'\fR return value indicates a bare \f(CW\*(C`null\*(C'\fR or
that decoding failed.
.SS "to_json"
.IX Subsection "to_json"
.Vb 1
\&  my $chars = to_json {i => \*(Aq♥ mojolicious\*(Aq};
.Ve
.PP
Encode Perl value to \s-1JSON\s0 text without \f(CW\*(C`UTF\-8\*(C'\fR encoding it.
.SS "true"
.IX Subsection "true"
.Vb 1
\&  my $true = true;
.Ve
.PP
True value, used because Perl has no native equivalent.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, <http://mojolicious.org>.