def init_servers():
# A container for all thread instances
threads = list()
# Inter-thread communication via FIFO Queues
# DHT ---> kademlia: queue for DHT to send requests to kademlia
request_q = Queue()
# kademlia ---> DHT: queue for kademlia to send responses to DHT
response_q = Queue()
# If an exception/error occurs in any of the threads it is not detectable.
# Therefore we use an additional queue that feeds the mail thread with
# potential exceptions/errors that occured in any of the children threads.
err_q = Queue()
# Create a thread for kademlia server
address = ('', config.KADEM_PORT)
kademlia_server = KademliaProtocolServer(request_q,
response_q,
err_q,
address)
t = Thread(target=kademlia_server.serve_forever)
threads.append(t)
# Create a thread for DHT server
address = ('', config.PORT)
dht_server = DHTAPIServer(request_q,
response_q,
err_q,
address)
t = Thread(target=dht_server.serve_forever)
threads.append(t)
for t in threads:
t.start()
# As long as we haven't received an EXIT signal, read the queue for
# potential exceptions/errors that occured in any of the children threads.
# The reading of the queue is with a blocking 'get', so no CPU cycles are
# wasted while waiting. Also, 'get' is given a timeout, so the SHUT_DOWN
# flag is always checked, even if there's nothing in the queue.
while not config.SHUT_DOWN:
try:
error, thread_name = err_q.get(block=True, timeout=0.05)
# An error/exception occured in a child thread. Update global
# variable to induce all children threads to exit and raise it
config.SHUT_DOWN = 1
wait_threads_exit(threads)
raise error, 'Exception in thread: %s' % thread_name
except Empty:
continue
logger.info('some signal for exit was received')
# shutting down has already been initiated by the signal handler
wait_threads_exit(threads)
exit_gracefully('successful shut down')
def determine_peer_id():
from hashlib import sha256
try:
public_key = open(config.PUBLIC_KEY_PATH, 'rb').read()
except IOError:
message = 'Public key path is set to: %s\n' % config.PUBLIC_KEY_PATH
message += 'If incorrect, please update file: %s' % config.CONFIG_PATH
exit_gracefully(message)
config.PEER_ID = int(sha256(public_key).hexdigest(), 16)
def determine_peer_id():
from hashlib import sha256
try:
public_key = open(config.PUBLIC_KEY_PATH, 'rb').read()
except IOError:
message = 'Public key path is set to: %s\n' % config.PUBLIC_KEY_PATH
message += 'If incorrect, please update file: %s' % config.CONFIG_PATH
exit_gracefully(message)
config.PEER_ID = int(sha256(public_key).hexdigest(), 16)
def check_args():
for i in range(len(sys.argv)):
# configuration file flag
if sys.argv[i] == '-c':
try:
config.CONFIG_PATH = sys.argv[i + 1]
except IndexError:
message = "missing configuration file operand after '-c'\n"
message += "Try '%s --help' for more information." % sys.argv[0]
exit_gracefully(message)
def check_args():
for i in range(len(sys.argv)):
# configuration file flag
if sys.argv[i] == '-c':
try:
config.CONFIG_PATH = sys.argv[i+1]
except IndexError:
message = "missing configuration file operand after '-c'\n"
message += "Try '%s --help' for more information." % sys.argv[0]
exit_gracefully(message)
def init_servers():
# A container for all thread instances
threads = list()
# Inter-thread communication via FIFO Queues
# DHT ---> kademlia: queue for DHT to send requests to kademlia
request_q = Queue()
# kademlia ---> DHT: queue for kademlia to send responses to DHT
response_q = Queue()
# If an exception/error occurs in any of the threads it is not detectable.
# Therefore we use an additional queue that feeds the mail thread with
# potential exceptions/errors that occured in any of the children threads.
err_q = Queue()
# Create a thread for kademlia server
address = ('', config.KADEM_PORT)
kademlia_server = KademliaProtocolServer(request_q, response_q, err_q,
address)
t = Thread(target=kademlia_server.serve_forever)
threads.append(t)
# Create a thread for DHT server
address = ('', config.PORT)
dht_server = DHTAPIServer(request_q, response_q, err_q, address)
t = Thread(target=dht_server.serve_forever)
threads.append(t)
for t in threads:
t.start()
# As long as we haven't received an EXIT signal, read the queue for
# potential exceptions/errors that occured in any of the children threads.
# The reading of the queue is with a blocking 'get', so no CPU cycles are
# wasted while waiting. Also, 'get' is given a timeout, so the SHUT_DOWN
# flag is always checked, even if there's nothing in the queue.
while not config.SHUT_DOWN:
try:
error, thread_name = err_q.get(block=True, timeout=0.05)
# An error/exception occured in a child thread. Update global
# variable to induce all children threads to exit and raise it
config.SHUT_DOWN = 1
wait_threads_exit(threads)
raise error, 'Exception in thread: %s' % thread_name
except Empty:
continue
logger.info('some signal for exit was received')
# shutting down has already been initiated by the signal handler
wait_threads_exit(threads)
exit_gracefully('successful shut down')
def read_conf():
if not os.path.isfile(config.CONFIG_PATH):
exit_gracefully("cannot read '%s': No such file or directory"
% config.CONFIG_PATH)
config_parser = ConfigParser.ConfigParser()
config_parser.read(config.CONFIG_PATH)
logger.debug('detected sections (%s): %s' % (config.CONFIG_PATH,
config_parser.sections()))
dht_properties = config_section_map(config_parser, 'COMMON')
config.PUBLIC_KEY_PATH = dht_properties['public_key_path']
dht_properties = config_section_map(config_parser, 'KX')
config.KX_PORT = int(dht_properties['port'])
config.KX_HOSTNAME = dht_properties['hostname']
dht_properties = config_section_map(config_parser, 'DHT')
config.PORT = int(dht_properties['port'])
config.KADEM_PORT = int(dht_properties['kadem_port'])
config.HOSTNAME = dht_properties['hostname']
def read_conf():
if not os.path.isfile(config.CONFIG_PATH):
exit_gracefully("cannot read '%s': No such file or directory" %
config.CONFIG_PATH)
config_parser = ConfigParser.ConfigParser()
config_parser.read(config.CONFIG_PATH)
logger.debug('detected sections (%s): %s' %
(config.CONFIG_PATH, config_parser.sections()))
dht_properties = config_section_map(config_parser, 'COMMON')
config.PUBLIC_KEY_PATH = dht_properties['public_key_path']
dht_properties = config_section_map(config_parser, 'KX')
config.KX_PORT = int(dht_properties['port'])
config.KX_HOSTNAME = dht_properties['hostname']
dht_properties = config_section_map(config_parser, 'DHT')
config.PORT = int(dht_properties['port'])
config.KADEM_PORT = int(dht_properties['kadem_port'])
config.HOSTNAME = dht_properties['hostname']