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path: root/lab_control/test/mock_sds1000xe_server.py
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import socket
import threading
import atexit

IP = "0.0.0.0"
PORT = 5025

# Bind server socket when this module is included
_serverSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
_serverSocket.bind((IP, PORT))
_serverSocket.listen(1)

# Close it when the program exits
atexit.register(_serverSocket.close)

class MockSDS1000XEServer:
    MOTD = "Hello".encode()

    def __init__(self):
        self._stopFlag = False
        self._clientSocket = None
        self._mainThread = threading.Thread(target=self._mainLoop)
        self._mainThread.start()

    def _mainLoop(self) -> None:
        self._clientSocket, _ = _serverSocket.accept()
        self._clientSocket.settimeout(0.1)
        self._clientSocket.send(MockSDS1000XEServer.MOTD)

        try:
            while not self._stopFlag:
                request = self._clientSocket.recv(4096).decode()
                if request != "":
                    print(f"** Received request: {request}")
                    response = self._handleRequest(request)
                    self._clientSocket.send(response.encode())
        except TimeoutError as e:
            pass
        finally:
            self._clientSocket.close()
    
    def _handleRequest(self, request: str) -> str:
        return "NOP"

    def stop(self):
        self._stopFlag = True
        self._mainThread.join()