import select

import socket

 

EPOLLIN = select.EPOLLIN

EPOLLOUT = select.EPOLLOUT

 

epoll = select.epoll(60000)

connections = {}

 

class Server(object):

    def __init__(self):

        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

        sock.setblocking(0)

        sock.bind((”, 8050))

        sock.listen(60000)

        self.socket = sock

 

        fileno = sock.fileno()

        connections[fileno] = self

        epoll.register(fileno, EPOLLIN)

 

    def onInput(self):

        sock, address = self.socket.accept()

        Client(sock)

 

class Client(object):

    input  = ”

    output = "HTTP/1.0 200 OK\r\nContent-Length: 5\r\n\r\nPong!\r\n"

 

    def __init__(self, sock):

        sock.setblocking(0)

        fileno = sock.fileno()

        epoll.register(fileno, EPOLLIN|EPOLLOUT)

        connections[fileno] = self

        self.socket = sock

 

    def onInput(self):

        newdata = self.socket.recv(1024)

        if len(newdata) is 0:

            self.close()

        self.input += newdata

 

    def onOutput(self):

        sent = self.socket.send(self.output)

        self.output = self.output[sent:]

        if len(self.output) is 0:

            self.close()

 

    def close(self):

        fileno = self.socket.fileno()

        del connections[fileno]

        epoll.unregister(fileno)

        self.socket.close()

 

Server()

 

while 1:

    for fd, event in epoll.poll():

        if event & EPOLLIN:

            connections[fd].onInput()

 

        if event & EPOLLOUT:

            connections[fd].onOutput()