Munin contributed plugins

#!/usr/bin/perl -w

#

# Copyright (C) Viktoras Pecia 2010(Based on 2006 Lars Strand "temperatures" code)

#

# Plugin to fetch humidity from weather.noaa.gov

#

# Parameters supported:

#

#       config

#       autoconf

#

# Magic markers:

#%# family=auto

#%# capabilities=autoconf

use strict;

my @wcode = undef;

if (defined($ENV{wcode})) {

    @wcode = split(' ', $ENV{wcode});

} else {

    @wcode = ("EYSA","EYKA","EYPA","EYVI");

}

my $proxy = $ENV{proxy}   || undef;   # Example: "http://proxy.foo.bar:8080/"

my $ret = undef;

if (! eval "require LWP::UserAgent;")

{

    $ret = "LWP::UserAgent not found";

}

if (defined $ARGV[0] and $ARGV[0] eq "autoconf") {

    if (defined $ret) {

	print "no ($ret)\n";

    } else {

	print "yes\n";

    }

    exit 0;

}

my $datasource = "http://weather.noaa.gov/pub/data/observations/metar/decoded/";

my $ua = LWP::UserAgent->new(timeout => 30);

$ua->agent('Munin');

# Use proxy, if defined.

if (defined($proxy)) {

    $ua->proxy(['http'], $proxy);

}

if (defined $ARGV[0] and $ARGV[0] eq "config") {

    print "graph_title Humidity\n";

    print "graph_args --base 1000 -l 0\n";

    print "graph_category sensors\n";

    print "graph_info This graph shows humidity fetched from weather.nooa.gov.\n";

    print "graph_vlabel humidity in %\n";

    for my $station (@wcode) {

	my $url = "$datasource$station.TXT";

	my $response = $ua->request(HTTP::Request->new('GET',$url));

	# New York City, Central Park, NY, United States (KNYC) 40-47-00N 073-58-00W 48M

        if ($response->content =~ /^((.*?),.*\)).*\n/) {

	    print "$station.label $2\n";

	    print "$station.info $1\n";

	} else {

	    print "$station.label $station\n";

	}

    }

}

for my $station (@wcode) {

    my $url = "$datasource$station.TXT";

    my $response = $ua->request(HTTP::Request->new('GET',$url));

    if ($response->content =~ /Relative Humidity:\s*(\d+)\%.*/) {

	    print "$station.value $1\n";

        } else {

	    print "$station.value U\n";

        }

    }