FreeDATA/modem/websocket_manager.py

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import threading
import json
# websocket multi client support for using with queued information.
# our client set which contains all connected websocket clients
events_client_list = set()
fft_client_list = set()
states_client_list = set()
def handle_connection(sock, client_list, event_queue):
event_queue.put({"type": "hello-client"})
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client_list.add(sock)
while True:
try:
sock.receive(timeout=1)
except Exception as e:
print(f"client connection lost: {e}")
try:
client_list.remove(sock)
except Exception as err:
print(f"error removing client from list: {e} | {err}")
break
return
def transmit_sock_data_worker(client_list, event_queue):
while True:
event = event_queue.get()
if isinstance(event, str):
print(f"WARNING: Queue event:\n'{event}'\n still in string format")
json_event = event
else:
json_event = json.dumps(event)
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clients = client_list.copy()
for client in clients:
try:
client.send(json_event)
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except Exception:
client_list.remove(client)
# start a worker thread for every socket endpoint
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def startThreads(app):
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events_thread = threading.Thread(target=transmit_sock_data_worker, daemon=True, args=(events_client_list, app.modem_events))
events_thread.start()
states_thread = threading.Thread(target=transmit_sock_data_worker, daemon=True, args=(states_client_list, app.state_queue))
states_thread.start()
fft_thread = threading.Thread(target=transmit_sock_data_worker, daemon=True, args=(fft_client_list, app.modem_fft))
fft_thread.start()