How to completely exit a server in python?

Question

How to exit a server completely in Python? Code like server.shutdown() just shuts down the incoming requests. Can anyone suggest any code for complete exit of server? It's a simple socketserver.

This is my code for server:

#!/usr/bin/python
import socket
from threading import Thread

class sockServer:

    def __init__(self,port):
        self.socket= socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.socket.bind(port)
        self.socket.listen(5)

    def _run(self):
        while True:
            request, client_address =self.socket.accept()
            counter=self.req_thread(self,request)
            counter.start()

    class req_thread(Thread):
        def __init__(self,controller,request):
            Thread.__init__(self)
            self.controller=controller
            self.request=request
            self.setDaemon(True)

        def run(self):
            input=self.request.makefile('rb',0)
            output=self.request.makefile('wb',0)
            l=True
            i=0
            try:
                while l:
            l=input.readline()
            if l!="exit\r\n":
                        print "x"
                        output.write(bytes('hello\n'))
                    else:
            print "y"
                        self.request.shutdown(2)
            run=False

            except socket.error:
                pass


if __name__ == '__main__':

    import sys
    if len(sys.argv) < 3:
        print('Usage: %s [hostname] [port number]' % sys.argv[0])
        sys.exit(1)
    hostname = sys.argv[1]
    port = int(sys.argv[2])
    global run
    run=True
    while run:
        server=sockServer((hostname,port))
        server._run()

The method using the variable run isn't doing any good!

score 2 · Answer 1 · edited Nov 12 '19 at 12:20

If you are just trying to exit the program completely then you can always add import sys and then in do this:

class req_thread(Thread):
    def __init__(self,controller,request):
        Thread.__init__(self)
        self.controller=controller
        self.request=request
        self.setDaemon(True)

    def run(self):
        input=self.request.makefile('rb',0)
        output=self.request.makefile('wb',0)
        l=True
        i=0
        try:
            while l:
                l=input.readline()
                if l!="exit\r\n":
                    print "x"
                    output.write(bytes('hello\n'))
                else:
                    print "y"
                    self.request.shutdown(2)
                    sys.exit(0)
                    run=False

        except socket.error:
            pass

score 2 · Accepted Answer · edited May 23 '17 at 11:51

2

If sys.exit isn't working then you can use a more extreme version which directly calls the os.

import os
os._exit()

You will have to do this if the server has forked a new process or thread. Which is what you are doing and why sys.exit isn't working as you expect. See this explanation of the difference between the two calls: What is difference between sys.exit(0) and os._exit(0)

edited May 23 '17 at 11:51

Community

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answered Sep 06 '12 at 07:59

aychedee

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How to completely exit a server in python?

2 Answers2