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mowas_mqtt.py
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mowas_mqtt.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*
import os # using the OS
import requests # requesting information
import json # working with JSON
import configparser # working with INI
from requests.exceptions import ConnectionError # errors in requests
# read settings from mowas_mqtt.ini
ApplicationDir = os.path.dirname(os.path.abspath(__file__))
ReadSettings = os.path.join(ApplicationDir, 'mowas_mqtt.ini')
Settings = configparser.ConfigParser()
Settings.read(ReadSettings)
# Log-Level
loglevel = Settings.get("General", "loglevel")
# MQTT-Settings
mqtt_paho = eval(Settings.get("MQTT", "Paho"))
mqtt_ipaddress = Settings.get("MQTT", "Broker")
mqtt_user = Settings.get("MQTT", "User")
mqtt_pass = Settings.get("MQTT", "Password")
mqtt_topic = Settings.get("MQTT", "Topic")
mqtt_port = int(Settings.get("MQTT", "Port"))
mqtt_qos = int(Settings.get("MQTT", "QOS"))
mqtt_retain = eval(Settings.get("MQTT", "Retain"))
mqtt_clientid = Settings.get("MQTT", "ClientID")
# Landkreis AGS
landkreis_ags=Settings.get("AGS", "AGScode")
# setting API information sort of from https://warnung.bund.de/bbk.config/config_rel.json
landkreis_status = 'https://warnung.bund.de/bbk.status/status_{}.json'.format(landkreis_ags)
json_URLs = {
'mowas': 'https://warnung.bund.de/bbk.mowas/gefahrendurchsagen.json',
'biwapp': 'https://warnung.bund.de/bbk.biwapp/warnmeldungen.json',
'katwarn': 'https://warnung.bund.de/bbk.katwarn/warnmeldungen.json',
'lhp': 'https://warnung.bund.de/bbk.lhp/hochwassermeldungen.json',
'dwd': 'https://warnung.bund.de/bbk.dwd/unwetter.json'
}
# start variables
buckets_live = {}
JSONreturn = {}
def on_connect(client, userdata, flags, rc):
# Connect to MQTT-Broker
if rc==0:
print("Connected to broker using Paho with result code " + str(rc))
else:
print("Connection Error to broker using Paho with result code "+ str(rc))
def send_mqtt_paho(message, topic):
# send MQTT message
print ("Sending JSON using Paho-Client with Broker '{}' to Topic '{}'".format(mqtt_ipaddress,topic))
if (loglevel == "DEBUG"):
print ("Broker with Client-ID '{}', Port '{}', User '{}', Passwort '{}' and QOS '{}', Retain '{}'".format(mqtt_clientid, mqtt_port, mqtt_user, mqtt_pass, mqtt_qos, mqtt_retain))
print ("Sending message: " + message)
mqttclient = mqtt.Client(mqtt_clientid)
mqttclient.on_connect = on_connect
if mqtt_user != "":
mqttclient.username_pw_set(mqtt_user, mqtt_pass)
mqttclient.connect(mqtt_ipaddress, mqtt_port, 60)
mqttclient.loop_start()
mqttpub = mqttclient.publish(topic, payload=message, qos=mqtt_qos, retain=mqtt_retain)
mqttclient.loop_stop()
mqttclient.disconnect()
def send_mqtt_os(message, topic):
# send MQTT message
print ("Sending JSON using os.system and mosquitto_pub and Broker '{}' to Topic '{}'".format(mqtt_ipaddress,topic))
os.system("mosquitto_pub -h " + mqtt_ipaddress + " -u '" + mqtt_user + "' -P '" + mqtt_pass + "' -t '" + topic + "' -m '" + message + "'")
def get_json_as_dict(url):
# GET JSON from URL
global requestError
headers = {'Accept': '*/*',
'Content-Type': 'application/json; charset=utf-8',
'User-Agent': 'MOWAS-MQTT'}
# make request, gracefully with error
try:
if (loglevel == "DEBUG"):
print("request URL: {} - {}".format(str(url),str(headers)))
r = requests.get(url, headers=headers)
except ConnectionError as e:
requestError = True
print("Connection Error")
print(e)
return json.loads('{"data": {"Connection Error": 1, "URL": "'+url+'", "error": "'+e+'"}}')
# wenn HTTP-StatusCode not 200
if r.status_code != 200:
requestError = True
print("HTTP Error")
print(str(r.status_code))
return json.loads('{"data": {"HTTP Error": 1, "URL": "'+url+'", "error": "'+str(r.status_code)+'"}}')
# JSON to dict, gracefully with error
try:
data = json.loads(r.content.decode())
except ValueError as e:
requestError = True
print("JSON Error")
print(e)
return json.loads('{"data": {"JSON Error": 1, "URL": "'+url+'", "error": "'+e+'"}}')
requestError = False
return data
def search_in_dict (values, searchterm):
# find a term in a dict
for k in values:
print (values)
print (k)
for v in values[k]:
if searchterm in v:
return True
return False
if __name__ == "__main__":
# get JSON from Landkreis as dict
landkreis_meldungen = get_json_as_dict(landkreis_status)
# check, if there's an error with the JSON
if (requestError == True):
send_mqtt(json.dumps(landkreis_meldungen), mqtt_topic)
if loglevel == "DEBUG":
print(landkreis_meldungen)
quit('Error in URL: ' + landkreis_status)
# check, if there's announcements for the Landkreis
i = 0
for bucket in landkreis_meldungen:
# MOWAS JSON has multiple buckets, currently:
# 0: bkk.mowas
# 1: bbk.biwapp
# 3: bkk.katwarn
# 4: bkk.lhp
# 5: bkk.dwd
keys = bucket['bucketname'].split(".")
buckets_live[keys[1]] = {}
if (loglevel == "DEBUG"):
print("Find Buckets #" + str(i))
for ref in bucket['ref']:
# call the URL and find message
if (loglevel == "DEBUG"):
print("Add Bucket to JSON: " + ref)
buckets_live[keys[1]]['ref'+str(i)] = ref
i = i + 1
# get the announcements information
if (loglevel == "DEBUG"):
print("Add Bucket to JSON: " + ref)
i = 0
for buckets in buckets_live:
if (len(buckets_live[buckets]) > 0):
# There's announcements for that bucket!
if (loglevel == "DEBUG"):
print("open JSON for Bucket: " + json_URLs[buckets])
announcementJSON = get_json_as_dict(json_URLs[buckets])
if (loglevel == "DEBUG"):
print("Found Announcements in: " + json_URLs[buckets])
for meldung, meldewert in (buckets_live[buckets].items()):
j = 0
while (j < len(announcementJSON)):
if (loglevel == "DEBUG"):
print("search Announcement for: " + meldewert)
if (announcementJSON[j]["identifier"] == meldewert):
if (loglevel == "DEBUG"):
print("Added Announcement for: " + meldewert)
JSONreturn[i] = announcementJSON[j]
JSONreturn[i]["info"][0]["area"][0].pop("polygon")
j = j+1
i = i + 1
# Sending final JSON with MQTT
if loglevel == "DEBUG":
print ("Sending MQTT")
# if Paho is active use this, else use mosquitto_pub with .os
if mqtt_paho == True:
import paho.mqtt.client as mqtt # using MQTT-client
send_mqtt_paho(json.dumps(JSONreturn), mqtt_topic)
else:
send_mqtt_os(json.dumps(JSONreturn), mqtt_topic)