使用python中的SocketServer框架创建多线程服务器

Question

#!/usr/bin/env python
#-*- coding: utf-8 -*-

import sys
sys.dont_write_bytecode = True
import shlex
import subprocess
import SocketServer

sess = []

class TCPHandler(SocketServer.BaseRequestHandler):
    def handle(self):
        global sess
        sess.append(self.request)
        ip,port = self.client_address
        print "#%d: client %s:%d"%(len(sess),ip,port)
        while True:
            cmd = self.request.recv(8192)
            out = subprocess.check_output(shlex.split(cmd),stderr=subprocess.STDOUT,shell=True)
            self.request.send(out)
        self.request.close()
class ThreadedTCPServer(SocketServer.ThreadingMixIn,SocketServer.TCPServer): pass

if __name__ == "__main__":
    port = 4242
    svr = ThreadedTCPServer(("",port),TCPHandler)
    print ":%d"%port
    svr.serve_forever()

Answer 1

#!/usr/bin/env python
#-*- coding: utf-8 -*-

import sys
sys.dont_write_bytecode = True
import shlex
import subprocess
import SocketServer

sess = []

class TCPHandler(SocketServer.BaseRequestHandler):
    def handle(self):
        global sess
        sess.append(self.request)
        ip,port = self.client_address
        print "#%d: client %s:%d"%(len(sess),ip,port)
        while True:
            cmd = self.request.recv(8192)
            out = subprocess.check_output(shlex.split(cmd),stderr=subprocess.STDOUT,shell=True)
            self.request.send(out)
        self.request.close()
class ThreadedTCPServer(SocketServer.ThreadingMixIn,SocketServer.TCPServer): pass

if __name__ == "__main__":
    port = 4242
    svr = ThreadedTCPServer(("",port),TCPHandler)
    print ":%d"%port
    svr.serve_forever()

Answer 2

你不应该循环

server = SocketServer.TCPServer(('',1520), service)
t = Thread(target=server.serve_forever())
t.start()

只是一个猜测。。

Answer 3

这比你想象的要简单得多：

class ThreadedTCPServer(SocketServer.ThreadingMixIn,SocketServer.TCPServer): pass

而不是使用新的ThreadedTCPServer而不是TCPServer。

有关详细信息，请阅读some doc。

但是在代码中您犯了一些错误：

1. 参数target必须是callable对象，而不是“已调用”对象。
2. 要处理许多请求，需要构建线程池。如果您只使用一个线程，那么如果它是主线程或“子”线程，则没有任何区别。