[英]Python SocketServer deadlock issue
当我对SocketServer实例进行线程化( serve_forever
方法)时,可以在发送文本“关闭”时轻松退出它,这正是我所期望的。 但是,如果它没有线程化,那么我会遇到它锁定的问题,我不知道该如何解决。
服务器本身的基本流程是开始->侦听->获取数据->从中获取命令->运行命令(这是一个插件)->返回结果。 这是我使用的代码:
import SocketServer as SS
NULL_RESP = {"status" : False, "data" : "No data received."}
class ASWCP_Daemon(SS.BaseRequestHandler):
def handle(self):
self.data = self.request.recv(1024).strip()
if self.data == "":
self.request.sendall(json.dumps(NULL_RESP))
return None
tmp = self.data.split(" ", 1)
cmd = tmp[0]
args = ""
try:
args = str(tmp[1]).split(conf.command_parse)
except:
pass
plugin = plugins["cmd"][cmd]['ref'].init(conf=conf, socket=self)
try:
if args[0] == "help":
self.request.sendall(plugin.help)
except IndexError:
status,data = plugin.run(args)
resp = {"status" : status, "data" : data}
self.request.sendall(json.dumps(resp))
if __name__ == "__main__":
# Log is created here; conf = config file (irrelevant to this issue)
try:
if conf.tcp:
if conf.threaded:
import threading
class ThreadedTCPServer(SS.ThreadingMixIn, SS.TCPServer):
pass
server = ThreadedTCPServer((conf.host, conf.listen_port), ASWCP_Daemon)
else:
server = SS.TCPServer((conf.host, conf.listen_port), ASWCP_Daemon)
else:
server = SS.UDPServer((conf.host, conf.listen_port), ASWCP_Daemon)
if conf.threaded:
sthread = threading.Thread(target=server.serve_forever)
#sthread.daemon = True
sthread.start()
else:
server.serve_forever()
except KeyboardInterrupt:
pass
关闭插件的运行方法是这样的:
def run(self, *args, **kwargs):
if self.socket == None:
print "> No socket available"
return (False,"")
else:
self.socket.log.info("Shutting down daemon")
self.socket.server.shutdown()
return (True,"")
如果使用线程,这很好,如果不是,则达到插件中的self.socket.server.shutdown()
方法。 self.socket
是ASWCP_Daemon类的实例。
# Do shutdown() if threaded, else execute server_close()
if self.sysconf.threaded:
self.socket.server.shutdown()
else:
self.socket.server.server_close()
return (True,"")
self.sysconf
是守护程序的配置(问题代码中的conf
), self.socket
是对流处理程序的引用。
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