initial commit

README.md

@@ -1,4 +1,30 @@
 check_json
 ==========
 
-Nagios plugin to check JSON attributes via http(s)
+Nagios plugin to check JSON attributes via http(s).
+
+This Plugin is a fork of the existing JSON Plugin from https://github.com/bbuchalter/check_json with the enhancements of using the Nagis::Plugins Perl Module, allowing to use thresholds and performancedata collection from various json attributes.
+
+Usage: check_json [ -v|--verbose ] [-U <URL>] [-t <timeout>] [ -c|--critical <threshold> ] [ -w|--warning <threshold> ] [ -a | --attribute ] <attribute>
+
+ -?, --usage
+   Print usage information
+ -h, --help
+   Print detailed help screen
+ -V, --version
+   Print version information
+ --extra-opts=[section][@file]
+   Read options from an ini file. See http://nagiosplugins.org/extra-opts
+   for usage and examples.
+ -U, --URL http://192.168.5.10:9332/local_stats
+ -a, --attribute {shares}->{dead}
+ -w, --warning INTEGER:INTEGER .  See http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT for the threshold format. 
+ -c, --critical INTEGER:INTEGER .  See http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT for the threshold format. 
+ -t, --timeout=INTEGER
+   Seconds before plugin times out (default: 15)
+ -v, --verbose
+   Show details for command-line debugging (can repeat up to 3 times)
+
+Example: 
+check_json.pl -U http://192.168.5.10:9332/local_stats -a '{shares}->{dead}' -w :5 -c :10
+

check_json.pl

@@ -0,0 +1,88 @@
+#!/usr/bin/env perl
+
+use warnings;
+use strict;
+use LWP::UserAgent;
+use JSON 'decode_json';
+use Nagios::Plugin;
+use Data::Dumper;
+
+my $np = Nagios::Plugin->new(  
+    usage => "Usage: %s [ -v|--verbose ] [-U <URL>] [-t <timeout>] "
+    . "[ -c|--critical <threshold> ] [ -w|--warning <threshold> ] "
+    . "[ -a | --attribute ] <attribute>",
+    version => '0.1',
+    blurb   => 'Nagios plugin to check JSON attributes via http(s)',
+    extra   => "\nExample: \n"
+    . "check_json.pl -U http://192.168.5.10:9332/local_stats -a '{shares}->{dead}' -w :5 -c :10",
+    url     => 'url',
+    license => 'GPLv2',
+    plugin  => 'check_json',
+    timeout => 15,
+);
+
+ # add valid command line options and build them into your usage/help documentation.
+$np->add_arg(
+    spec => 'URL|U=s',
+    help => '-U, --URL http://192.168.5.10:9332/local_stats',
+    required => 1,
+);
+$np->add_arg(
+    spec => 'attribute|a=s',
+    help => '-a, --attribute {shares}->{dead}',
+    required => 1,
+);
+$np->add_arg(
+    spec => 'warning|w=s',
+    help => '-w, --warning INTEGER:INTEGER .  See '
+    . 'http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT '
+    . 'for the threshold format. ',
+);
+$np->add_arg(
+    spec => 'critical|c=s',
+    help => '-c, --critical INTEGER:INTEGER .  See '
+    . 'http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT '
+    . 'for the threshold format. ',
+);
+
+# Parse @ARGV and process standard arguments (e.g. usage, help, version)
+$np->getopts;
+
+
+## GET URL
+my $ua = LWP::UserAgent->new;
+
+$ua->agent('Redirect Bot');
+$ua->protocols_allowed( [ 'http', 'https'] );
+$ua->parse_head(0);
+$ua->timeout($np->opts->timeout);
+
+my $response = $ua->get($np->opts->URL);
+
+if ($response->header("content-type") ne 'application/json') {
+     $np->nagios_exit(UNKNOWN,"Content type is not JSON: ".$response->header("content-type"));
+}
+
+my $json_response = decode_json($response->content) ; #NAG-EXIT;
+if ($np->opts->verbose) { (print Dumper ($json_response))};
+
+my $value;
+my $exec = '$value = $json_response->'.$np->opts->attribute;
+if ($np->opts->verbose) {print "EXEC is: $exec \n"};
+eval $exec;
+
+if (!defined $value) {
+    $np->nagios_exit(UNKNOWN, "No value received");
+}
+
+$np->add_perfdata( 
+    label => 'value',
+    value => $value,
+    #threshold => $threshold,
+);
+
+$np->nagios_exit(
+    return_code => $np->check_threshold($value),
+    message     => $value
+);
+