def run(self):
"""线程主函数
循环运行，接受新的客户端的连接。
"""
log.info('server thread: start, port: %d' % self.port)
try:
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server.bind(('0.0.0.0', self.port))
server.listen(1)
server.settimeout(3) # timeout: 3s
while self.running:
try:
conn, address = server.accept()
conn.settimeout(3)
self.got_client_cb(conn, address)
log.debug('new client from: %s' % str(address))
except socket.timeout:
pass
server.close()
log.info('server thread: bye')
except Exception as e:
log.error('server thread error: %s' % e)
self.running = False
def run(self):
"""线程主函数
循环运行，接受到控制端口的 socket 连接（唯一），接收命令。
"""
log.info('control thread: start, port: %d' % self.port)
try:
# 开始监听
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server.bind(('0.0.0.0', self.port))
server.listen(1)
server.settimeout(3) # timeout: 3s
# 循环运行，监听端口，接收命令
while self.running:
self.accept_client(server)
self.receive_command()
self.resolve_command()
self.send_message()
server.close()
self.disconnect_client()
log.info('control thread: bye')
except Exception as e:
log.error('control thread error: %s' % e)
self.running = False
def receive_data(self):
"""建立连接并循环接收数据
在超时时重连，在出错时返回。
"""
client = self.connect()
log.info('client thread: connected')
timeout_count = 0
while self.running:
try:
# 接收数据
data = client.recv(BUFFER_SIZE)
# 连接失败的处理
if len(data) == 0:
raise RuntimeError('socket connection broken')
# 收到数据后的处理
self.rcv_count += 1
log.debug('rcv %d bytes. id: %d' % (len(data), self.rcv_count))
self.got_data_cb(data, self.rcv_count)
timeout_count = 0
except socket.timeout:
# 超时处理，超时5次时主动重连
# 超时时间短是为了在需要时能快速退出
timeout_count += 1
if timeout_count >= 5:
timeout_count = 0
client = self.reconnect(client)
log.debug('client timeout, reconnect')
try:
client.close()
except socket.error:
pass
except Exception as e:
log.error('client exception when close: %s' % e)
def run(self):
"""线程主函数
循环运行，建立连接、接收数据，并在连接出错时重连。
"""
log.info('client thread: start')
while self.running:
try:
self.receive_data()
except Exception as e:
log.error('client thread error: %s' % e)
time.sleep(3)
log.info('client thread: bye')
def accept_client(self, server):
"""监听控制端口
尝试接受连接，如果有新连接，就关闭旧的连接。
Args:
server: server socket
"""
try:
conn, address = server.accept()
self.disconnect_client()
self.client = conn
self.client.settimeout(3)
log.info('new control client from: %s' % str(address))
except socket.timeout:
pass
def run(self):
"""线程主函数
循环运行，不断把 self.data_queue 中的数据包分发给各 SenderThread
"""
log.info('dispatcher thread: start')
while self.running:
try:
data, rcv_count = self.data_queue.get(timeout=1)
try:
num_clients = self.send_data(data)
self.data_queue.task_done()
log.debug('send %d bytes to %d clients. id: %d' % (len(data), num_clients, rcv_count))
except Exception as e:
log.error('dispatcher thread error: %s' % e)
except queue.Empty:
pass
self.stop_all_clients()
log.info('dispatcher thread: bye')
def main(self):
# config
config_file_name = os.path.join(sys.path[0], 'conf/config.json')
try:
with open(config_file_name) as config_fp:
configs = json.load(config_fp)
except:
print('failed to load config from config.json.')
return
# log init
log.initialize_logging(configs['enableLog'].lower() == 'true')
log.info('main: start')
# threads
self.server = ServerThread(configs['listenPort'], self.got_client_cb)
self.controller = ControlThread(configs['controlPort'],
self.got_command_cb)
self.dispatcher = DispatcherThread(self.pcb_manager.on_recv_heartbeat)
self.client = ClientThread(configs['serverIpAddress'],
configs['serverPort'], self.got_data_cb)
self.server.start()
self.controller.start()
self.dispatcher.start()
self.client.start()
# wait
self.wait_for_keyboard()
# quit & clean up
self.controller.running = False
self.controller.join()
self.client.running = False
self.client.join()
self.server.running = False
self.server.join()
self.dispatcher.running = False
self.dispatcher.join()
log.info('main: bye')
def resolve_command(self):
"""解析来自控制端口的数据
首先寻找指令起始标记，找不到就从 buffer 头删除一个字节，再继续寻找。
然后调用 resolve_command_from_begin() 从 buffer 的开头开始解析，直到遇到结尾标记为止。
"""
while len(self.buffer) >= 4:
# 解析指令
try:
if self.is_in_command: # 指令从 buffer[0] 开始
command = self.resolve_command_from_begin()
if self.is_in_command: # 没有遇到结尾，收到的指令还不完整
break
elif isinstance(command, str): # 收到了指令
log.info('control command: %s' % command)
self.got_command_cb(command)
elif self.buffer[:4] == CMD_BEGIN: # begin of command
self.is_in_command = True
else:
del self.buffer[0] # 出队一个字节
except Exception as e:
log.warning('control thread resolve: %s' % e)
def run(self):
"""线程主函数
循环运行，接收来自客户端的数据并丢弃，向客户端发送 data_queue 中的数据包。
当 data_queue 过长时，丢弃旧的数据包。
"""
log.info('sender thread %d: start, %s' %
(self.sender_id, self.address))
while self.running:
try:
# ignore old data
if self.data_queue.qsize() > 10:
self.data_queue.empty()
# send data
try:
data = self.data_queue.get(timeout=1)
self.client_socket.settimeout(5)
self.client_socket.sendall(data)
self.send_count += 1
self.data_queue.task_done()
except queue.Empty:
pass
except ValueError as e:
log.warning('sender thread %d ValueError: %s' %
(self.sender_id, e))
# rcv heartbeat data
try:
self.client_socket.settimeout(1)
new_recv_data = self.client_socket.recv(1024)
if len(new_recv_data) > 0:
self.data_received += new_recv_data
self.parse_heartbeat_recv_buffer() # 分包
except socket.timeout:
pass
except Exception as e:
log.error('sender thread %d error: %s' % (self.sender_id, e))
self.running = False
self.disconnect()
log.info('sender thread %d: bye' % self.sender_id)