VRED freezes when executing a script

Anonymous — Tue, 05 Jan 2021 16:40:17 GMT

Hi,

i am using VRED Pro 2021 [13.0.0.10349] and want to import external data via sockets. Therefore i wrote the following python script:

import socket

import threading

SERVER = socket.gethostbyname(socket.gethostname())

PORT = 5051

ADDR = (SERVER, PORT)

FORMAT = 'utf-8'

DISCONNECT_MESSAGE = "!DISCONNECT"

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

server.bind(ADDR)

def handle_client(conn, addr😞

print(f"[NEW CONNECTION] {addr} connected.")

connected = True

while connected:

msg = conn.recv(8192).decode(FORMAT)

if msg == DISCONNECT_MESSAGE:

connected = False

print(f"[{addr} {msg}]")

conn.close()

def start():

server.listen()

print(f"[LISTENING] Server is listening on {SERVER}")

while True:

conn, addr = server.accept()

thread = threading.Thread(target=handle_client, args=(conn, addr))

thread.start()

print(f"[ACTIVE CONNECTIONS] {threading.activeCount() -1}")

print ("[STARTING] server is starting")

start()

The script works. I tested it seperatly. Whenever i try to run it, the script-editor and VRED itself freeze.

Does anyone know why?

Re: VRED freezes when executing a script

sinje_thiedemann — Tue, 05 Jan 2021 17:51:51 GMT

Hi,

it looks like your start() method is blocking the main thread.

Scripts are executed in VRED's main thread. So the gui and everything will be blocked/frozen if a script blocks it.

Try running start() in a separate thread, as you're already doing for the connections.

Anonymous — Tue, 05 Jan 2021 19:05:15 GMT

Thank you very much. That solved my problem!