torch-subscriber-simple/torchsub/torch_sub.py

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import argparse
import configparser
import json
import os
import sys
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import threading
import paho.mqtt.subscribe as mqtt
from torchsub import torch_sub_webserver
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database_filename = "clients.json"
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database_lock = threading.Lock()
# noinspection PyUnusedLocal
def update_client_record(client, userdata, message):
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database_lock.acquire()
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with open(database_filename, 'r') as infile:
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database = json.load(infile)
payload = message.payload.decode('utf-8')
response = json.loads(payload)
database[response['clientId']] = response
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with open(database_filename, 'w') as outfile:
json.dump(database, outfile)
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database_lock.release()
def subscribe(broker_hostname, broker_port, topic="torch", tls=None):
mqtt.callback(update_client_record,
topic,
hostname=broker_hostname,
port=broker_port,
tls=tls)
class Config:
def __init__(self):
self.broker_hostname = None
self.broker_port = None
self.topic = None
self.tls = None
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self.database_file = database_filename
self.web_port = 8080
parser = self.do_cli_argument_parsing()
(config_path, config_filename) = self.get_config_path(parser.parse_args())
print("Using torch configuration path: " + config_path)
self.read_configuration_file(config_path, config_filename)
@staticmethod
def do_cli_argument_parsing():
parser = argparse.ArgumentParser(description='Simple Torch Flat-file Database Subscriber')
parser.add_argument('--config-dir',
nargs='?',
dest='configPath',
default='/etc/torch',
help='configuration directory (default: /etc/torch)')
parser.add_argument('--config-filename',
nargs='?',
dest='configFilename',
default='torch-sub.conf',
help='configuration filename (default: torch-sub.conf)')
return parser
@staticmethod
def get_config_path(args):
config_path = args.configPath
if "TORCH_CONFIG_DIR" in os.environ:
config_path = os.environ.get("TORCH_CONFIG_DIR")
if not config_path.endswith("/"):
config_path = config_path + "/"
return config_path, args.configFilename
def read_configuration_file(self, config_dir, config_filename):
config_file_path = os.path.join(config_dir, config_filename)
if not os.path.exists(config_file_path):
print("Unable to locate config file at '%s'" % config_file_path)
sys.exit(1)
config = configparser.ConfigParser()
config.read(config_file_path)
mqtt_config = config['mqtt']
self.broker_hostname = mqtt_config.get('BrokerHost', fallback="localhost")
self.broker_port = mqtt_config.getint('BrokerPort', fallback=1883)
self.topic = mqtt_config.get('Topic', fallback="torch/+/onion_url")
require_certificate = mqtt_config.getboolean('RequireCertificate', fallback=False)
ca_file = config_dir + mqtt_config.get('CaFile', "")
cert_file = config_dir + mqtt_config.get('CertFile', "")
key_file = config_dir + mqtt_config.get('KeyFile', "")
self.tls = None
if require_certificate:
self.tls = {
'ca_certs': ca_file,
'certfile': cert_file,
'keyfile': key_file
}
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if config.has_section('database'):
self.database_file = config['database'].get('Filename', fallback=database_filename)
if config.has_section('web'):
self.web_port = config['web'].getint('Port', fallback=self.web_port)
def main():
config = Config()
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global database_filename
database_filename = config.database_file
if not os.path.exists(database_filename):
with open(database_filename, 'w') as database_blank:
json.dump({}, database_blank)
threading.Thread(target=torch_sub_webserver.app.run,
args=("localhost", config.web_port),
daemon=True).start()
subscribe(config.broker_hostname,
config.broker_port,
config.topic,
config.tls)