Parse the Nagios status.dat and poop out some JSON

status2json.py

#!/usr/bin/python3
""" 
    This script will dump host stats from your Nagios4 status.dat as JSON.

    You can put this in your /usr/lib/cgi-bin/nagios4 directory and chmod +x this file, 
    then, to access it remotely use python requests:
        r = requests.get('https://nagiosinstall-location.com/nagios4/cgi-bin/status2json.py', auth=HTTPDigestAuth(user,pass))
        print(r.json())

    You might need to add .py to your http.conf cgi handlers.

    Right now I output this JSON:
        [
            'Server-Name':
                { 'state': 'UP'
                  'plugin_output': 'PING OK - Packet loss = 0%, RTA = 8.85 ms'
                }
        ]


    Forked from @alexwright
"""
import re
import json

STATUS_FILE_PATH = "/var/lib/nagios4/status.dat"

def read_status():
    hosts = {}
    services = {}

    fh = open(STATUS_FILE_PATH)
    status_raw = fh.read()
    pattern = re.compile('([\w]+)\s+\{([\S\s]*?)\}',re.DOTALL)
    matches = pattern.findall(status_raw)
    for def_type, data in matches:
        lines = [line.strip() for line in data.split("\n")]
        pairs = [line.split("=", 1) for line in lines if line != '']
        data = dict(pairs)

        if def_type == "servicestatus":
            services[data['service_description']] = data
            if 'host_name' in data:
                hosts[data['host_name']]['services'].append(data)

        if def_type == "hoststatus":
            data['services'] = []
            hosts[data['host_name']] = data
    return {
        'hosts': hosts,
        'services': services,
    }

if __name__ == "__main__":
    data = read_status()

    # Readable state table, I'm just displaying it, so dont want integers.
    STATE = { '0': 'UP',
            '1': 'DOWN',
            '2': 'UNREACHABLE',
            }

    hoststats = []
    for d in data.get('hosts'):
        plugin_output = data.get('hosts').get(d).get('plugin_output')
        current_state = data.get('hosts').get(d).get('current_state')
        state = STATE[current_state]
        this_status = { d: { 'state': state, 'plugin_output': plugin_output }}
        hoststats.append(this_status)

    print("Content-Type: application/json;charset=utf-8\n")
    print(json.dumps(hoststats))