mirror of
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119 lines
No EOL
3.7 KiB
Python
119 lines
No EOL
3.7 KiB
Python
"""
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@file Message.py
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@author 30hours
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"""
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import socket
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import threading
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import asyncio
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class Message:
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"""
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@class Message
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@brief A class for simple TCP messaging using a listener and sender.
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"""
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def __init__(self, host, port):
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"""
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@brief Constructor for Message.
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@param host (str): The host to bind the listener to.
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@param port (int): The port to bind the listener to.
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"""
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self.host = host
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self.port = port
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self.server_socket = None
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self.callback_message_received = None
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def start_listener(self):
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"""
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@brief Start the TCP listener to accept incoming connections.
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@details Ensure this function is run in a separate thread.
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@return None.
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"""
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self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.server_socket.bind((self.host, self.port))
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self.server_socket.listen()
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print(f"Listener is waiting for connections on {self.host}:{self.port}")
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while True:
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conn, addr = self.server_socket.accept()
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thread = threading.Thread(target=self.handle_client, args=(conn, addr))
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thread.start()
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def handle_client(self, conn, addr):
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"""
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Handle communication with a connected client.
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:param conn (socket.socket): The socket object for the connected client.
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:param addr (tuple): The address (host, port) of the connected client.
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:return None.
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"""
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with conn:
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while True:
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data = conn.recv(8096)
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if not data:
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break
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# Process data in chunks
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decoded_data = ""
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while data:
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chunk = data.decode()
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decoded_data += chunk
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data = conn.recv(8096)
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# Call the callback function if set
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if self.callback_message_received:
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reply = asyncio.run(self.callback_message_received(decoded_data))
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if reply:
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# Send the reply in chunks
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for i in range(0, len(reply), 8096):
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conn.sendall(reply[i:i + 8096].encode())
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def send_message(self, message):
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"""
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Send a message to the specified host and port.
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:param message (str): The message to be sent.
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:return generator: A generator yielding chunks of the reply.
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"""
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with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as client_socket:
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client_socket.settimeout(3)
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try:
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client_socket.connect((self.host, self.port))
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# Send the message in chunks
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for i in range(0, len(message), 8096):
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client_socket.sendall(message[i:i + 8096].encode())
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# Indicate the end of transmission
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client_socket.shutdown(socket.SHUT_WR)
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# Receive the reply in chunks
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while True:
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data = client_socket.recv(8096)
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if not data:
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break
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yield data.decode()
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except ConnectionRefusedError:
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print(f"Connection to {self.host}:{self.port} refused.")
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def set_callback_message_received(self, callback):
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"""
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@brief Set callback function when a message is received.
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@param callback (function): The callback function.
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@return None.
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"""
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self.callback_message_received = callback
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def close_listener(self):
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"""
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@brief Close the listener socket.
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@return None.
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"""
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if self.server_socket:
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self.server_socket.close() |