Question

In the next examlpe I have Socket server handled in the thread. In the handle function we create Thread and pass request and client_address.
When we handle the request in run-method of the Thread it’s only possible to receive data, but when I try to send somthing an Exception is raised ([Errno 9] Bad file descriptor)
What’s wrong?

import SocketServer
import threading


class MyServerThread(threading.Thread):

    def __init__(self, channel, details):
        self.channel = channel
        self.details = details
        threading.Thread.__init__(self)

    def run(self):
        print 'Received connection:', self.details[0]
        self.channel.send('(Response)')
        print 'Received:', self.channel.recv(1024)
        self.channel.close()
        print 'Closed connection:', self.details[0]


class MyThreadedSocketServerHandler(SocketServer.BaseRequestHandler):

    def handle(self):
        thread1 = MyServerThread(self.request, self.client_address)
        thread1.start()

if __name__ == '__main__':
    server = SocketServer.TCPServer(('localhost', 8888), MyThreadedSocketServerHandler)
    server.serve_forever()


#---Client to test---
import socket

message = "(Request)"

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
    sock.connect(('localhost', 8888))
    sock.send(message)
    data = sock.recv(1024)
    print 'Sent:     %s' % message
    print 'Received: %s' % data
finally:
    sock.close()




#Working example without "join"
import socket
import threading

class ClientThread(threading.Thread):

    def __init__(self, channel, details):
        self.channel = channel
        self.details = details
        threading.Thread.__init__(self)

    def run(self):
        print 'Received connection:', self.details[0]
        self.channel.send('message')
        print self.channel.recv(1024)
        self.channel.close()
        print 'Closed connection:', self.details[0]

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind(('', 8888))
server.listen(5)

while True:
    channel, details = server.accept()
    ClientThread(channel, details).start()

Answer 1

I think you are looking for ThreadingMixIn:

from SocketServer import TCPServer, ThreadingMixIn

class MyServerThread(ThreadingMixIn, TCPServer): pass