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Full Discussion: Perl array / json
Top Forums Programming Perl array / json Post 302822223 by ab52 on Monday 17th of June 2013 06:57:40 AM
Old 06-17-2013
Perl array / json
Hi All

I have used the below code to print the dumper of a json

Code:
#!/usr/bin/perl

use LWP::Simple;                
use JSON qw( decode_json );     
use Data::Dumper;               
use strict;                     
use warnings;

my (%list);                 

my $trendsurl = "http://sensu:4567/events";

my $json = get( $trendsurl );
die "Could not get $trendsurl!" unless defined $json;

my $decoded_json = decode_json( $json );




print Dumper $decoded_json;


which gives me the following

Code:
$VAR1 = [                                                                                                                                                                                           
          {                                                                                                                                                                                         
            'client' => 'es1.',                                                                                                                                                            
            'flapping' => bless( do{\(my $o = 0)}, 'JSON::XS::Boolean' ),
            'check' => 'disk_usage',
            'occurrences' => 2160,
            'issued' => 1371466494,
            'status' => 1,
            'handlers' => [
                            'default'
                          ],
            'output' => 'com.dneg.es1.df.boot.df_complex.free OK
WARNING: com.dneg.es1.df.opt-elasticsearch.df_complex.free will run out of space in 10 days at current rate
com.dneg.es1.df.root.df_complex.free OK
'
          },
          {
            'client' => 'graphite1.',
            'flapping' => $VAR1->[0]{'flapping'},
            'check' => 'disk_usage',
            'occurrences' => 7028,
            'issued' => 1371466494,
            'status' => 1,
            'handlers' => [
                            'default'
                          ],
            'output' => 'com.dneg.graphite1.df.boot.df_complex.free OK
com.dneg.graphite1.df.root.df_complex.free OK
WARNING: com.dneg.graphite1.df.user_data.df_complex.free will run out of space in 12 days at current rate
'
          },


I am now stuck in how to use that data, i want to extract the client and the Warning

i.e

client' => 'graphite1.
WARNING: fee will run out of space in 12 days at current rate

any pointers would be great

Thanks
ADam
 

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LEARN ABOUT DEBIAN

mojo::json

Mojo::JSON(3pm) 					User Contributed Perl Documentation					   Mojo::JSON(3pm)

NAME

       Mojo::JSON - Minimalistic JSON

SYNOPSIS

	 use Mojo::JSON;

	 my $json  = Mojo::JSON->new;
	 my $bytes = $json->encode({foo => [1, 2], bar => 'hello!'});
	 my $hash  = $json->decode($bytes);

DESCRIPTION

       Mojo::JSON is a minimalistic and relaxed implementation of RFC 4627. While it is possibly the fastest pure-Perl JSON parser available, you
       should not use it for validation.

       It supports normal Perl data types like "Scalar", "Array" reference, "Hash" reference and will try to call the "TO_JSON" method on blessed
       references, or stringify them if it doesn't exist.

	 [1, -2, 3]	-> [1, -2, 3]
	 {"foo": "bar"} -> {foo => 'bar'}

       Literal names will be translated to and from Mojo::JSON constants or a similar native Perl value.

	 true  -> Mojo::JSON->true
	 false -> Mojo::JSON->false
	 null  -> undef

       Decoding UTF-16 (LE/BE) and UTF-32 (LE/BE) will be handled transparently, encoding will only generate UTF-8. The two unicode whitespace
       characters "u2028" and "u2029" will always be escaped to make JSONP easier.

ATTRIBUTES

       Mojo::JSON implements the following attributes.

   "error"
	 my $err = $json->error;
	 $json	 = $json->error('Oops!');

       Parser errors.

METHODS

       Mojo::JSON inherits all methods from Mojo::Base and implements the following new ones.

   "decode"
	 my $array = $json->decode($bytes);
	 my $hash  = $json->decode($bytes);

       Decode JSON.

   "encode"
	 my $bytes = $json->encode({foo => 'bar'});

       Encode Perl structure.

   "false"
	 my $false = Mojo::JSON->false;
	 my $false = $json->false;

       False value, used because Perl has no native equivalent.

   "true"
	 my $true = Mojo::JSON->true;
	 my $true = $json->true;

       True value, used because Perl has no native equivalent.

SEE ALSO

       Mojolicious, Mojolicious::Guides, <http://mojolicio.us>.

perl v5.14.2							    2012-09-05							   Mojo::JSON(3pm)
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