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https://github.com/BOSWatch/BW3-Core.git
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125 lines
4 KiB
Python
125 lines
4 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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"""!
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____ ____ ______ __ __ __ _____
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/ __ )/ __ \/ ___/ | / /___ _/ /______/ /_ |__ /
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/ __ / / / /\__ \| | /| / / __ `/ __/ ___/ __ \ /_ <
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/ /_/ / /_/ /___/ /| |/ |/ / /_/ / /_/ /__/ / / / ___/ /
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/_____/\____//____/ |__/|__/\__,_/\__/\___/_/ /_/ /____/
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German BOS Information Script
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by Bastian Schroll
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@file: client.py
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@date: 09.12.2017
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@author: Bastian Schroll
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@description: Class implementation for a TCP socket client
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"""
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import logging
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import socket
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import select
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from pprint import pformat
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logging.debug("- %s loaded", __name__)
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HEADERSIZE = 10
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class TCPClient:
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"""!TCP client class"""
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def __init__(self, timeout=3):
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"""!Create a new instance
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@param timeout: timeout for the client in sec. (3)"""
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socket.setdefaulttimeout(timeout)
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self._sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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def connect(self, host="localhost", port=8080):
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"""!Connect to the server
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@param host: Server IP address ("localhost")
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@param port: Server Port (8080)
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@return True or False"""
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try:
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if not self.isConnected:
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self._sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self._sock.connect((host, port))
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logging.debug("connected to %s:%s", host, port)
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return True
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logging.warning("client always connected")
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return True
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except socket.error as e:
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logging.error(e)
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return False
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def disconnect(self):
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"""!Disconnect from the server
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@return True or False"""
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try:
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if self.isConnected:
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self._sock.shutdown()
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self._sock.close()
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logging.debug("disconnected")
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return True
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logging.warning("client always disconnected")
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return True
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except socket.error as e:
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logging.error(e)
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return False
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def transmit(self, data):
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"""!Send a data packet to the server
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@param data: data to send to the server
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@return True or False"""
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try:
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logging.debug("transmitting:\n%s", pformat(data))
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header = str(len(data)).ljust(HEADERSIZE)
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self._sock.sendall(bytes(header + data, "utf-8"))
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logging.debug("transmitted...")
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return True
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except socket.error as e:
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logging.error(e)
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return False
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def receive(self, timeout=1):
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"""!Receive data from the server
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@param: timeout to wait for incoming data in seconds
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@return received data"""
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try:
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read, _, _ = select.select([self._sock], [], [], timeout)
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if not read: # check if there is something to read
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return False
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header = self._sock.recv(HEADERSIZE)
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if not len(header): # check if there data
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return False
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logging.debug("recv header: %s", header)
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length = int(header.decode("utf-8").strip())
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received = self._sock.recv(length).decode("utf-8")
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logging.debug("received %d bytes: %s", len(received), received)
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return received
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except socket.error as e:
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logging.error(e)
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return False
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@property
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def isConnected(self):
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"""!Property of client connected state"""
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try:
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if self._sock:
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_, write, _ = select.select([], [self._sock], [], 0.1)
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if write:
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data = "<keep-alive>"
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header = str(len(data)).ljust(HEADERSIZE)
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self._sock.sendall(bytes(header + data, "utf-8"))
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return True
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return False
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except socket.error as e:
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if e.errno != 32:
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logging.exception(e)
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return False
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except ValueError:
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return False
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